/* ==========================================================================
   donote · Apple Notes / Finder 风格跨设备剪贴工作台设计系统
   ========================================================================== */

:root {
  /* 统一间距尺度 (4 / 8 / 12 / 16 / 24 / 32px) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;

  /* 字体栈：优先 macOS 中西文，兼顾 Windows 与 Linux */
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* 浅色模式 (Apple HIG + Logo 暖橙绯红基因：温润苹果灰白画布 + 纯白立体阴影卡片 + 苹果系统彩色饱和度五色顶栏) */
  --bg-app: #F5F5F7;
  --bg-app-gradient: radial-gradient(960px 460px at 18% -10%, rgba(255, 111, 26, 0.055), transparent 68%),
                     radial-gradient(900px 440px at 82% -8%, rgba(255, 45, 85, 0.045), transparent 65%),
                     #F5F5F7;
  --bg-topbar: rgba(255, 255, 255, 0.82);
  --bg-topbar-fallback: #FFFFFF;
  --bg-surface: #FFFFFF;
  --bg-surface-elevated: #FFFFFF;
  --bg-subtle: #F2F2F7;
  --bg-code: #F8F8FA;
  --bg-hover: rgba(28, 28, 30, 0.045);
  --bg-active: rgba(28, 28, 30, 0.085);

  --text-primary: #1D1D1F;
  --text-secondary: #48484A;
  --text-muted: #8E8E93;
  --text-inverse: #FFFFFF;

  --border-subtle: rgba(60, 60, 67, 0.08);
  --border-strong: rgba(60, 60, 67, 0.14);
  --border-card: rgba(60, 60, 67, 0.07);

  /* Logo 品牌双色 (左上活力暖橙 #F56F11 + 右下洋红绯红 #E01C41，调校至 Apple HIG 标准彩色饱和度) */
  --brand-orange: #FF6F1A;
  --brand-crimson: #FF2D55;
  --brand-gradient: linear-gradient(135deg, #FF7A1A 0%, #FF582E 52%, #F22952 100%);

  /* Apple HIG 彩色饱和度 5 类语义色板 (融合 Logo 暖橙与绯红基因 + 苹果系统级明快饱和度)
     Text: Apple Notes 暖金黄 | Code: Apple System Blue | Link: Apple System Green | Image: Logo 洋红绯红 (Apple Pink/Red) | File: Logo 活力暖橙 (Apple Orange) */
  --paste-color-text: #F5B000;
  /* 顶部 0% 降至暗琥珀确保白字 3.7:1 对比度，60% 恢复亮黄品牌色 */
  --paste-grad-text: linear-gradient(180deg, #C88200 0%, #FFCC00 62%, #F0A500 100%);
  --paste-color-code: #007AFF;
  /* 顶部压至深蓝，对比度 4.5:1 */
  --paste-grad-code: linear-gradient(180deg, #0055CC 0%, #1A8CFF 62%, #0066E6 100%);
  --paste-color-link: #34C759;
  /* 顶部压至深翠绿，对比度 6.2:1 */
  --paste-grad-link: linear-gradient(180deg, #177A32 0%, #3CD664 62%, #24B248 100%);
  --paste-color-image: #FF2D55;
  /* 顶部压至深绯红，对比度 4.2:1 */
  --paste-grad-image: linear-gradient(180deg, #C4103A 0%, #FF4268 62%, #E01C41 100%);
  --paste-color-file: #FF6F1A;
  /* 顶部压至深橙，对比度 3.6:1 */
  --paste-grad-file: linear-gradient(180deg, #C24800 0%, #FF8524 62%, #F05E0E 100%);

  /* 主强调色：呼应 Logo 主色调的 Apple Vibrant Tangelo (活力暖阳橙)，兼具苹果高饱和通透感与品牌辨识度 */
  --accent: #F56314;
  --accent-hover: #E05206;
  --accent-active: #C24100;
  --accent-soft: rgba(245, 99, 20, 0.11);
  --accent-border: rgba(245, 99, 20, 0.28);
  --focus-ring: 0 0 0 3px rgba(245, 99, 20, 0.22);

  /* 语义状态色 (对齐 Apple System Red / Green / Orange) */
  --danger: #FF3B30;
  --danger-hover: #D7281E;
  --danger-soft: rgba(255, 59, 48, 0.1);

  --success: #34C759;
  --success-hover: #248A3D;
  --success-soft: rgba(52, 199, 89, 0.12);

  --warning: #FF9500;
  --warning-soft: rgba(255, 149, 0, 0.12);
  --warning-text: #B25000;

  /* 圆角规范 (卡片 12–16px) */
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-card: 14px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* 柔和立体阴影，凸显 Paste 官网纯白卡片在浅灰白画布上的悬浮质感 */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-card: 0 10px 26px -6px rgba(15, 23, 42, 0.08), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
  --shadow-card-hover: 0 16px 34px -6px rgba(15, 23, 42, 0.13), 0 4px 10px -2px rgba(15, 23, 42, 0.06);
  --shadow-popover: 0 14px 36px rgba(15, 23, 42, 0.14), 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-modal: 0 24px 52px rgba(15, 23, 42, 0.2), 0 4px 12px rgba(15, 23, 42, 0.07);

  /* 动效时长 (120–200ms) */
  --transition-fast: 140ms cubic-bezier(0.22, 1, 0.36, 1);
  --transition-normal: 180ms cubic-bezier(0.22, 1, 0.36, 1);

  --topbar-height: 52px;
  --card-col-width: 300px;
  --card-scale: 1;
}

/* 深色模式：Apple macOS Dark Mode 深空灰黑画布 + 品牌暖橙绯红微光氛围，衬托苹果高饱和度五色卡片顶栏 */
:root[data-theme="dark"] {
  --bg-app: #111114;
  --bg-app-gradient: radial-gradient(1050px 520px at 16% -10%, rgba(255, 122, 26, 0.11), transparent 65%),
                     radial-gradient(950px 480px at 84% -6%, rgba(255, 55, 95, 0.085), transparent 60%),
                     #111114;
  --bg-topbar: rgba(24, 24, 28, 0.78);
  --bg-topbar-fallback: #18181C;
  --bg-surface: #1C1C1E;
  --bg-surface-elevated: #2C2C2E;
  --bg-subtle: #161618;
  --bg-code: #151518;
  --bg-hover: rgba(255, 255, 255, 0.07);
  --bg-active: rgba(255, 255, 255, 0.12);

  --text-primary: #F5F5F7;
  --text-secondary: #AEAEB2;
  --text-muted: #7C7C80;
  --text-inverse: #111114;

  --border-subtle: rgba(255, 255, 255, 0.085);
  --border-strong: rgba(255, 255, 255, 0.16);
  --border-card: rgba(255, 255, 255, 0.09);

  /* 深色模式下 Apple HIG 标准提亮彩色饱和度 */
  --brand-orange: #FF8533;
  --brand-crimson: #FF375F;
  --brand-gradient: linear-gradient(135deg, #FF8E3C 0%, #FF6438 52%, #FF375F 100%);

  --paste-color-text: #FFD60A;
  --paste-grad-text: linear-gradient(180deg, #FFD60A 0%, #F5B000 100%);
  --paste-color-code: #0A84FF;
  --paste-grad-code: linear-gradient(180deg, #2E96FF 0%, #0070E0 100%);
  --paste-color-link: #30D158;
  --paste-grad-link: linear-gradient(180deg, #3CE065 0%, #24B849 100%);
  --paste-color-image: #FF375F;
  --paste-grad-image: linear-gradient(180deg, #FF4F72 0%, #E62249 100%);
  --paste-color-file: #FF7A1A;
  --paste-grad-file: linear-gradient(180deg, #FF9500 0%, #F06410 100%);

  --accent: #FF7A28;
  --accent-hover: #FF944D;
  --accent-active: #F06210;
  --accent-soft: rgba(255, 122, 40, 0.16);
  --accent-border: rgba(255, 122, 40, 0.36);
  --focus-ring: 0 0 0 3px rgba(255, 122, 40, 0.3);

  --danger: #FF453A;
  --danger-hover: #FF6961;
  --danger-soft: rgba(255, 69, 58, 0.16);

  --success: #30D158;
  --success-hover: #28B84C;
  --success-soft: rgba(48, 209, 88, 0.16);

  --warning: #FFD60A;
  --warning-soft: rgba(255, 214, 10, 0.15);
  --warning-text: #FFE566;

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-card: 0 6px 16px -2px rgba(0, 0, 0, 0.42), 0 2px 6px -1px rgba(0, 0, 0, 0.28);
  --shadow-card-hover: 0 14px 28px -4px rgba(0, 0, 0, 0.56), 0 4px 10px -2px rgba(0, 0, 0, 0.35);
  --shadow-popover: 0 16px 40px rgba(0, 0, 0, 0.62), 0 2px 8px rgba(0, 0, 0, 0.42);
  --shadow-modal: 0 24px 56px rgba(0, 0, 0, 0.72);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg-app: #111114;
    --bg-app-gradient: radial-gradient(1050px 520px at 16% -10%, rgba(255, 122, 26, 0.11), transparent 65%),
                       radial-gradient(950px 480px at 84% -6%, rgba(255, 55, 95, 0.085), transparent 60%),
                       #111114;
    --bg-topbar: rgba(24, 24, 28, 0.78);
    --bg-topbar-fallback: #18181C;
    --bg-surface: #1C1C1E;
    --bg-surface-elevated: #2C2C2E;
    --bg-subtle: #161618;
    --bg-code: #151518;
    --bg-hover: rgba(255, 255, 255, 0.07);
    --bg-active: rgba(255, 255, 255, 0.12);

    --text-primary: #F5F5F7;
    --text-secondary: #AEAEB2;
    --text-muted: #7C7C80;
    --text-inverse: #111114;

    --border-subtle: rgba(255, 255, 255, 0.085);
    --border-strong: rgba(255, 255, 255, 0.16);
    --border-card: rgba(255, 255, 255, 0.09);

    --brand-orange: #FF8533;
    --brand-crimson: #FF375F;
    --brand-gradient: linear-gradient(135deg, #FF8E3C 0%, #FF6438 52%, #FF375F 100%);

    --paste-color-text: #FFD60A;
    --paste-grad-text: linear-gradient(180deg, #FFD60A 0%, #F5B000 100%);
    --paste-color-code: #0A84FF;
    --paste-grad-code: linear-gradient(180deg, #2E96FF 0%, #0070E0 100%);
    --paste-color-link: #30D158;
    --paste-grad-link: linear-gradient(180deg, #3CE065 0%, #24B849 100%);
    --paste-color-image: #FF375F;
    --paste-grad-image: linear-gradient(180deg, #FF4F72 0%, #E62249 100%);
    --paste-color-file: #FF7A1A;
    --paste-grad-file: linear-gradient(180deg, #FF9500 0%, #F06410 100%);

    --accent: #FF7A28;
    --accent-hover: #FF944D;
    --accent-active: #F06210;
    --accent-soft: rgba(255, 122, 40, 0.16);
    --accent-border: rgba(255, 122, 40, 0.36);
    --focus-ring: 0 0 0 3px rgba(255, 122, 40, 0.3);

    --danger: #FF453A;
    --danger-hover: #FF6961;
    --danger-soft: rgba(255, 69, 58, 0.16);

    --success: #30D158;
    --success-hover: #28B84C;
    --success-soft: rgba(48, 209, 88, 0.16);

    --warning: #FFD60A;
    --warning-soft: rgba(255, 214, 10, 0.15);
    --warning-text: #FFE566;

    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-card: 0 6px 16px -2px rgba(0, 0, 0, 0.42), 0 2px 6px -1px rgba(0, 0, 0, 0.28);
    --shadow-card-hover: 0 14px 28px -4px rgba(0, 0, 0, 0.56), 0 4px 10px -2px rgba(0, 0, 0, 0.35);
    --shadow-popover: 0 16px 40px rgba(0, 0, 0, 0.62), 0 2px 8px rgba(0, 0, 0, 0.42);
    --shadow-modal: 0 24px 56px rgba(0, 0, 0, 0.72);
  }
}

/* 尊重减弱动态效果偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   全局基础与视口布局
   ========================================================================== */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  height: 100dvh;
  overflow: hidden;
  background-color: var(--bg-app);
  background-image: var(--bg-app-gradient);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 防闪烁（Anti-FOUC）：首屏检测到本地有效凭据时直接展示工作台 */
html.preload-auth #auth-section {
  display: none !important;
}
html.preload-auth #chat-section {
  display: flex !important;
}

.container {
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-app);
  position: relative;
  overflow: hidden;
}

.section {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 统一键盘焦点清晰可见 */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible,
[tabindex]:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* ==========================================================================
   认证页 (Auth Screen)
   ========================================================================== */

.auth-screen {
  justify-content: center;
  align-items: center;
  padding: var(--space-6);
  background-color: var(--bg-app);
  overflow-y: auto;
  position: relative;
}

.auth-home-link {
  position: absolute;
  top: 24px;
  left: 28px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
}
.auth-home-link:hover { color: var(--accent); }

@media (max-width: 640px) {
  .auth-home-link { top: 18px; left: 18px; font-size: 12px; }
  .auth-screen { padding-top: 54px; }
}

.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-popover);
  padding: var(--space-8) var(--space-6);
  box-sizing: border-box;
  animation: fadeScaleIn var(--transition-normal);
}

.auth-brand {
  text-align: center;
  margin-bottom: var(--space-6);
}

.auth-logo {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 2px 6px rgba(245, 99, 20, 0.24));
}

.auth-brand h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.auth-brand .subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.auth-form > input:not([type="checkbox"]),
#account-options select,
.auth-form select,
#account-factor-fields input,
#account-options input:not([type="checkbox"]),
#registration-fields input:not([type="checkbox"]) {
  width: 100%;
  min-height: 40px;
  box-sizing: border-box;
  padding: 0 var(--space-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  color: var(--text-primary);
  font: inherit;
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.auth-form > input:not([type="checkbox"]):focus,
#account-factor-fields input:focus,
#account-options input:not([type="checkbox"]):focus,
#account-options select:focus,
#registration-fields input:not([type="checkbox"]):focus {
  outline: none;
  background: var(--bg-surface);
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
}

.auth-form > input::placeholder,
#account-factor-fields input::placeholder,
#account-options input::placeholder,
#registration-fields input::placeholder { color: var(--text-muted); }

.auth-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-2);
}

.password-field-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  margin-bottom: var(--space-4);
}

.password-field-wrapper input {
  width: 100%;
  height: 40px;
  padding: 0 40px 0 var(--space-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  background: var(--bg-subtle);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.password-field-wrapper input:focus {
  outline: none;
  background: var(--bg-surface);
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
}

.password-toggle-btn {
  position: absolute;
  right: 6px;
  width: 30px;
  height: 30px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xs);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.password-toggle-btn:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.login-duration-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  accent-color: var(--accent);
  width: 15px;
  height: 15px;
  cursor: pointer;
}

.login-duration-select {
  height: 30px;
  padding: 0 26px 0 var(--space-2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  background-color: var(--bg-subtle);
  color: var(--text-primary);
  font-size: 0.8rem;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238E8E93' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 7px center;
  background-size: 13px;
}

.login-duration-select:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

#account-factor-fields,
#account-options,
#registration-fields {
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-2);
}
#account-factor-fields:not(.hidden),
#account-options:not(.hidden),
#registration-fields:not(.hidden) { display: flex; }

#account-factor-fields .auth-label,
#account-options .auth-label,
#registration-fields .auth-label { margin-bottom: 0; }

#account-options .checkbox-label {
  align-items: flex-start;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

#account-options .checkbox-label input { margin-top: 3px; flex-shrink: 0; }
#registration-toggle { width: 100%; font-size: 0.9rem; }
#account-options .btn, #account-reset-btn { font-size: 0.82rem; }
.registration-note,
#account-recovery-result, #account-setup-secret {
  font-size: 0.82rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
  color: var(--text-secondary);
}

.auth-submit-btn {
  margin-top: var(--space-2);
  width: 100%;
  height: 40px;
  font-size: 0.92rem;
  font-weight: 600;
}

.error-msg {
  color: var(--danger);
  font-size: 0.82rem;
  margin-top: var(--space-3);
  text-align: center;
}

/* ==========================================================================
   macOS 工具栏风格顶栏 (Top Bar)
   ========================================================================== */

.app-topbar {
  height: var(--topbar-height);
  background-color: var(--bg-topbar-fallback);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 var(--space-6);
  flex-shrink: 0;
  z-index: 100;
}

.app-topbar-inner {
  max-width: 1440px;
  width: 100%;
  height: 100%;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(auto, 1fr) minmax(180px, 280px) minmax(auto, 1fr);
  align-items: center;
  gap: var(--space-4);
}

@supports ((backdrop-filter: blur(16px)) or (-webkit-backdrop-filter: blur(16px))) {
  .app-topbar {
    background-color: var(--bg-topbar);
    backdrop-filter: saturate(180%) blur(18px);
    -webkit-backdrop-filter: saturate(180%) blur(18px);
  }
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-width: 0;
}

.topbar-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  user-select: none;
  flex-shrink: 0;
  cursor: default;
  transition: opacity var(--transition-fast);
}

.topbar-brand:hover .brand-logo-img {
  transform: scale(1.06);
  filter: drop-shadow(0 3px 8px rgba(245, 99, 20, 0.35));
}

.brand-logo {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 2px 6px rgba(245, 99, 20, 0.24));
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.brand-name {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* 分段式视图切换 (Segmented Control Tabs) */
.tabs {
  display: inline-flex;
  align-items: center;
  background: rgba(120, 120, 128, 0.12);
  padding: 2px;
  border-radius: var(--radius-sm);
  gap: 2px;
  flex-shrink: 0;
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 28px;
  padding: 0 var(--space-3);
  background: transparent;
  border: none;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
  white-space: nowrap;
}

.tab:hover {
  color: var(--text-primary);
}

.tab.active {
  color: var(--text-primary);
  background: var(--bg-surface);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
  font-weight: 600;
}

.tab-badge {
  font-size: 0.7rem;
  line-height: 1;
  padding: 2px 5px;
  border-radius: var(--radius-full);
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

/* 居中搜索栏：紧凑精巧，与顶栏左右模块均衡对齐 */
.topbar-search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 280px;
  justify-self: center;
}

.search-icon {
  position: absolute;
  left: 10px;
  color: var(--text-muted);
  pointer-events: none;
  transition: color var(--transition-fast);
}

.topbar-search {
  width: 100%;
  height: 32px;
  padding: 0 58px 0 30px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.81rem;
  font-family: inherit;
  background: var(--bg-surface);
  color: var(--text-primary);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.topbar-search::placeholder {
  color: var(--text-muted);
}

.topbar-search:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
}

.topbar-search-wrapper:focus-within .search-icon {
  color: var(--accent);
}

.topbar-search-wrapper:focus-within .search-kbd {
  opacity: 0;
  pointer-events: none;
}

.search-kbd {
  position: absolute;
  right: 8px;
  padding: 1px 6px;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.topbar-search-clear {
  position: absolute;
  right: 6px;
  width: 24px;
  height: 24px;
  background: transparent;
  border: none;
  border-radius: var(--radius-xs);
  color: var(--text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.topbar-search-clear:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.toolbar-status {
  position: absolute;
  right: 32px;
  font-size: 0.72rem;
  color: var(--text-muted);
  pointer-events: none;
  white-space: nowrap;
}

.toolbar-status.searching {
  color: var(--accent);
  font-weight: 500;
}

/* 右侧轻量状态与工具区 */
.topbar-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
}

/* 顶栏显眼卡片缩放控制器（− 滑块 + 像素徽章） */
.topbar-zoom-control {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 6px 0 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-xs);
  user-select: none;
  flex-shrink: 0;
}

.zoom-step-btn {
  width: 22px;
  height: 22px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.zoom-step-btn:hover:not(:disabled) {
  background: var(--accent-soft);
  color: var(--accent);
}

.zoom-step-btn:active:not(:disabled) {
  transform: scale(0.92);
}

.zoom-step-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.topbar-zoom-control #card-size-slider {
  width: 78px;
  flex: none;
}

.zoom-value-badge {
  height: 22px;
  padding: 0 7px;
  border: none;
  border-radius: var(--radius-full);
  background: var(--accent-soft);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.zoom-value-badge:hover {
  background: var(--accent);
  color: #FFFFFF;
}

.connection-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: var(--text-muted);
  user-select: none;
}

.connection-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  flex-shrink: 0;
}

.connection-dot.disconnected {
  background: var(--danger);
}

.status {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
}

.status.disconnected {
  color: var(--danger);
}

.topbar-icon-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
}

.topbar-icon-btn:hover,
.topbar-icon-btn[aria-expanded="true"] {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* ==========================================================================
   显示与工作台设置面板 (Popover Menu)
   ========================================================================== */

.popover-anchor {
  position: relative;
}

.settings-popover,
.display-settings-popover {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 264px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-popover);
  padding: var(--space-3);
  z-index: 300;
  animation: fadeScaleIn var(--transition-fast);
  transform-origin: top right;
}

.popover-section {
  padding: var(--space-1) var(--space-1) var(--space-2);
}

.popover-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-2);
}

.popover-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.popover-link-btn {
  background: transparent;
  border: none;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 500;
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
}

.popover-link-btn:hover {
  background: var(--accent-soft);
}

.segmented-control {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--bg-subtle);
  padding: 2px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  gap: 2px;
}

.segmented-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 28px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.segmented-btn.active {
  background: var(--bg-surface);
  color: var(--text-primary);
  box-shadow: var(--shadow-xs);
  font-weight: 600;
}

.card-size-controller {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.card-size-icon {
  font-size: 0.72rem;
  color: var(--text-muted);
  white-space: nowrap;
}

#card-size-slider,
#popover-card-size-slider {
  flex: 1;
  height: 4px;
  appearance: none;
  -webkit-appearance: none;
  background: var(--border-strong);
  border-radius: var(--radius-full);
  cursor: pointer;
}

#card-size-slider::-webkit-slider-thumb,
#popover-card-size-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-surface);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

#card-size-slider::-webkit-slider-thumb:hover,
#popover-card-size-slider::-webkit-slider-thumb:hover {
  transform: scale(1.12);
}

#card-size-slider::-moz-range-thumb,
#popover-card-size-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-surface);
  cursor: pointer;
}

.popover-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-2) 0;
}

.popover-meta-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: var(--space-1);
}

.popover-meta-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.76rem;
  color: var(--text-muted);
}

.popover-meta-item strong {
  font-weight: 500;
  color: var(--text-secondary);
}

.version-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.popover-actions {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.popover-menu-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 7px var(--space-2);
  border: none;
  border-radius: var(--radius-xs);
  background: transparent;
  color: var(--text-primary);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.popover-menu-btn:hover:not(:disabled) {
  background: var(--bg-hover);
}

.popover-menu-btn.danger {
  color: var(--danger);
}

.popover-menu-btn.danger:hover:not(:disabled) {
  background: var(--danger-soft);
}

.popover-menu-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ==========================================================================
   底部悬浮毛玻璃 Dock (Paste Pinboard 分类筛选胶囊 + 按需展开输入抽屉)
   ========================================================================== */

.floating-dock-wrapper {
  position: fixed;
  bottom: max(16px, env(safe-area-inset-bottom, 16px));
  left: 50%;
  transform: translateX(-50%);
  z-index: 65;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  max-width: calc(100vw - 24px);
  pointer-events: none;
}

.floating-dock-wrapper > * {
  pointer-events: auto;
}

.paste-filter-bar.floating-filter-dock {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 8px;
  background: color-mix(in srgb, var(--bg-surface-elevated) 84%, transparent);
  backdrop-filter: saturate(190%) blur(22px);
  -webkit-backdrop-filter: saturate(190%) blur(22px);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-popover);
  max-width: 100%;
}

.paste-filter-inner {
  display: flex;
  align-items: center;
  gap: 5px;
  overflow-x: auto;
  max-width: 100%;
  scrollbar-width: none;
}

.paste-filter-inner::-webkit-scrollbar {
  display: none;
}

.dock-divider {
  width: 1px;
  height: 18px;
  background: var(--border-strong);
  margin: 0 3px;
  flex-shrink: 0;
}

.dock-compose-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 32px;
  padding: 0 13px;
  border-radius: var(--radius-full);
  border: 1px solid var(--accent-border);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.dock-compose-btn:hover,
.dock-compose-btn.active {
  background: var(--accent);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 3px 10px -2px var(--accent-border);
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 12px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.filter-chip:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.filter-chip.active {
  color: #ffffff;
  border-color: transparent;
  background: var(--brand-gradient);
  box-shadow: 0 3px 10px -2px var(--accent-border);
  font-weight: 600;
}

.filter-chip.active[data-filter="text"] {
  background: var(--paste-grad-text);
  box-shadow: 0 3px 10px -2px rgba(245, 176, 0, 0.42);
}

.filter-chip.active[data-filter="code"] {
  background: var(--paste-grad-code);
  box-shadow: 0 3px 10px -2px rgba(0, 122, 255, 0.4);
}

.filter-chip.active[data-filter="link"] {
  background: var(--paste-grad-link);
  box-shadow: 0 3px 10px -2px rgba(52, 199, 89, 0.4);
}

.filter-chip.active[data-filter="image"] {
  background: var(--paste-grad-image);
  box-shadow: 0 3px 10px -2px rgba(255, 45, 85, 0.4);
}

.filter-chip.active[data-filter="file"] {
  background: var(--paste-grad-file);
  box-shadow: 0 3px 10px -2px rgba(255, 111, 26, 0.42);
}

.filter-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.filter-chip.active .filter-dot {
  background: #ffffff !important;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3);
}

.filter-dot-all {
  background: var(--accent);
}
.filter-dot-text {
  background: var(--paste-color-text);
}
.filter-dot-code {
  background: var(--paste-color-code);
}
.filter-dot-link {
  background: var(--paste-color-link);
}
.filter-dot-image {
  background: var(--paste-color-image);
}
.filter-dot-file {
  background: var(--paste-color-file);
}

/* ==========================================================================
   网络状态横幅 (Network Status Banner)
   ========================================================================== */

.network-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: 6px var(--space-4);
  background: var(--warning-soft);
  color: var(--warning-text);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  flex-shrink: 0;
}

.network-retry-btn {
  background: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xs);
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
}

.network-retry-btn:hover {
  background: var(--bg-hover);
}

/* ==========================================================================
   工作台主内容区与稳定响应式网格
   ========================================================================== */

#chat-section {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.tab-panel {
  display: none;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.tab-panel.active {
  display: flex;
}

.chat-container {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  position: relative;
}

.workspace-scroll,
.favorites-container {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: var(--space-4) var(--space-6) 88px;
  scroll-behavior: smooth;
}

.workspace-inner {
  max-width: 1440px;
  margin: 0 auto;
  width: 100%;
}

.load-older-btn {
  margin: var(--space-4) auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--bg-surface);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 6px 16px;
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-fast);
}

.load-older-btn:hover:not(:disabled) {
  color: var(--accent);
  border-color: var(--accent-border);
  background: var(--bg-surface-elevated);
}

.messages-top-loading {
  padding: 6px var(--space-4);
  margin-bottom: var(--space-3);
  font-size: 0.78rem;
  color: var(--text-muted);
  text-align: center;
}

/* 采用 CSS Grid 实现从左到右、从上到下的稳定等高卡片网格：
   align-items: stretch 保证同一行所有卡片高度严格对齐，间隙随卡片比例无感缩放 */
.messages-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, var(--card-col-width, 300px)), 1fr));
  gap: clamp(6px, calc(12px * var(--card-scale, 1)), 16px);
  align-items: stretch;
  width: 100%;
  position: relative;
  padding-left: 18px;
}

/* 左侧贯穿式垂直时间轴主线 */
.messages-list::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--accent-border) 0%,
    var(--border-strong) 50%,
    transparent 100%
  );
  border-radius: 2px;
  pointer-events: none;
}

/* 单列阅读列表模式 */
.messages-list.layout-list {
  grid-template-columns: minmax(0, 1fr);
  max-width: 760px;
  margin: 0 auto;
}

/* 醒目时间轴日期分割线：左侧锚点圆环 + 居中/左对齐胶囊徽章 + 贯穿横线 */
.timeline-date-divider {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-3) 0 var(--space-1);
  padding: var(--space-1) 0;
  position: relative;
  user-select: none;
  width: 100%;
}

.timeline-date-divider:first-child {
  margin-top: 0;
}

/* 左侧时间轴主线上的发光节点 */
.timeline-date-divider::before {
  content: '';
  position: absolute;
  left: -17px;
  top: 50%;
  transform: translateY(-50%);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg-surface);
  box-shadow: 0 0 0 3px var(--accent-soft);
  z-index: 2;
}

/* 向右延伸的时间分割横线 */
.timeline-date-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border-strong), var(--border-subtle) 70%, transparent);
}

.timeline-date-divider .timeline-date-badge {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-surface);
  padding: 4px 10px 4px 8px;
  border-radius: var(--radius-full);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--accent);
  border: 1px solid var(--accent-border);
  box-shadow: var(--shadow-xs);
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.timeline-date-divider .timeline-date-badge:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.timeline-chevron {
  transition: transform var(--transition-fast);
  color: var(--text-muted);
}

.timeline-date-divider.is-collapsed .timeline-chevron {
  transform: rotate(-90deg);
}

.timeline-date-divider.is-collapsed::before {
  background: var(--bg-surface);
  border-color: var(--border-strong);
  box-shadow: none;
}

.timeline-date-divider.is-collapsed .timeline-date-badge {
  color: var(--text-secondary);
  border-color: var(--border-subtle);
}

.timeline-date-count {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-subtle);
  padding: 1px 6px;
  border-radius: var(--radius-full);
  font-variant-numeric: tabular-nums;
}

.message.timeline-group-collapsed {
  display: none !important;
}

/* 空状态、加载态与错误态 */
.messages-loading,
.messages-empty,
.empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 64px var(--space-6);
  color: var(--text-muted);
}

.empty-state-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-3);
  box-shadow: var(--shadow-xs);
}

.empty-state-title {
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.empty-state-desc {
  font-size: 0.84rem;
  color: var(--text-muted);
  max-width: 360px;
}

/* ==========================================================================
   内容卡片 (Content-First Cards)
   ========================================================================== */

/* ==========================================================================
   Paste 风格卡片 (Paste-Inspired Cards: Colored Header + Full-Bleed Content + Bottom Meta)
   ========================================================================== */

/* Paste 官网原版卡片：近似正方形圆角卡片 (240px × 236px 比例) + 纯净底色与鲜亮顶栏 */
.message.paste-card {
  --paste-header-bg: var(--paste-grad-text);
  --paste-body-bg: var(--bg-surface);
  --paste-border-tint: var(--border-card);
  /* 紧凑彩色头部：保留类型识别，但减少卡片顶部的视觉占位 */
  --header-h: clamp(28px, calc(36px * var(--card-scale, 1)), 40px);
  --card-r: clamp(10px, calc(16px * var(--card-scale, 1)), 20px);
  background: var(--paste-body-bg);
  border: 1px solid var(--paste-border-tint);
  border-radius: var(--card-r);
  padding: 0;
  box-shadow: var(--shadow-card);
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  height: calc(236px * var(--card-scale, 1));
  min-height: calc(236px * var(--card-scale, 1));
  /* 禁用 height/width 过渡，确保拖动滑块时 60fps 零迟滞同比例无感缩放 */
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast), opacity var(--transition-fast);
}

/* Apple HIG 彩色饱和度 + Logo 双色融合 5 类卡片配色：
   Text 备忘录暖金黄 / Code Xcode 苹果蓝 / Link 苹果活力翠绿 / Image Logo 洋红绯红 / File Logo 活力暖橙 */
.message.paste-card.variant-text {
  --paste-header-bg: var(--paste-grad-text);
  --paste-accent-color: var(--paste-color-text);
  --paste-icon-fg: #D48E00;
  --paste-meta-fg: color-mix(in srgb, var(--text-primary) 55%, #B47800 45%);
  --paste-body-bg: color-mix(in srgb, var(--bg-surface) 98.2%, var(--paste-color-text) 1.8%);
  --paste-border-tint: color-mix(in srgb, var(--border-card) 88%, var(--paste-color-text) 12%);
}

.message.paste-card.variant-code {
  --paste-header-bg: var(--paste-grad-code);
  --paste-accent-color: var(--paste-color-code);
  --paste-icon-fg: #0066E6;
  --paste-meta-fg: color-mix(in srgb, var(--text-primary) 55%, #0055B3 45%);
  --paste-body-bg: color-mix(in srgb, var(--bg-surface) 98.5%, var(--paste-color-code) 1.5%);
  --paste-border-tint: color-mix(in srgb, var(--border-card) 88%, var(--paste-color-code) 12%);
}

.message.paste-card.variant-link {
  --paste-header-bg: var(--paste-grad-link);
  --paste-accent-color: var(--paste-color-link);
  --paste-icon-fg: #1F9E40;
  --paste-meta-fg: color-mix(in srgb, var(--text-primary) 55%, #15803D 45%);
  --paste-body-bg: var(--bg-surface);
  --paste-border-tint: color-mix(in srgb, var(--border-card) 88%, var(--paste-color-link) 12%);
}

.message.paste-card.variant-image {
  --paste-header-bg: var(--paste-grad-image);
  --paste-accent-color: var(--paste-color-image);
  --paste-icon-fg: #E01C41;
  --paste-meta-fg: color-mix(in srgb, var(--text-primary) 55%, #BE123C 45%);
  --paste-body-bg: var(--bg-surface);
  --paste-border-tint: color-mix(in srgb, var(--border-card) 88%, var(--paste-color-image) 12%);
}

.message.paste-card.variant-file {
  --paste-header-bg: var(--paste-grad-file);
  --paste-accent-color: var(--paste-color-file);
  --paste-icon-fg: #E0580C;
  --paste-meta-fg: color-mix(in srgb, var(--text-primary) 55%, #C2410C 45%);
  --paste-body-bg: color-mix(in srgb, var(--bg-surface) 98.2%, var(--paste-color-file) 1.8%);
  --paste-border-tint: color-mix(in srgb, var(--border-card) 88%, var(--paste-color-file) 12%);
}

.messages-list.layout-list .message.paste-card {
  height: auto;
  min-height: 132px;
}

.message.paste-card:hover,
.message.paste-card:focus-within {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border-strong);
  transform: translateY(-2px);
  z-index: 6;
}

.message.is-new {
  animation: cardHighlight 1.2s ease-out;
}

@keyframes cardHighlight {
  0% {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow-card);
  }
  100% {
    border-color: var(--border-card);
    box-shadow: var(--shadow-card);
  }
}

.message.deleting {
  opacity: 0;
  transform: scale(0.98);
}

.message.favorited {
  border-color: var(--accent-border);
}

/* 顶部彩色栏：左侧常驻类型名+时间双行，鼠标悬停时工具按钮浮现覆盖左侧文字；右上角常驻出血式 Apple 拟物应用大角标 */
.message-header {
  height: var(--header-h, 44px);
  min-height: var(--header-h, 44px);
  padding: 0 0 0 clamp(6px, calc(10px * var(--card-scale, 1)), 12px);
  background: var(--paste-header-bg);
  color: #ffffff;
  border-radius: calc(var(--card-r, 16px) - 1px) calc(var(--card-r, 16px) - 1px) 0 0;
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: clamp(4px, calc(8px * var(--card-scale, 1)), 10px);
  flex-shrink: 0;
  position: relative;
  z-index: 5;
  user-select: none;
  cursor: pointer;
  transition: filter var(--transition-fast);
}

.message-header:active,
.message-header.header-copied-flash {
  filter: brightness(1.1);
}

.message-header-left {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  flex: 1;
  padding-right: 4px;
  gap: 1px;
}

/* 类型名 + 时间：同一行排列，整体在色带中垂直居中。 */
.paste-card-labels {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 6px;
  min-width: 0;
  flex: 1 1 auto;
  overflow: hidden;
}

/* 标题是头部主信息，保持醒目的显示尺寸；过长时才省略。 */
.paste-card-type-label {
  flex: 0 1 auto;
  min-width: 0;
  max-width: calc(100% - 3.8em);
  font-size: 0.9rem;
  font-weight: 750;
  line-height: 1;
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.28);
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

/* 时间保持单行、不收缩，并略低于标题一级。 */
.paste-card-header-time {
  flex: 0 0 auto;
  min-width: max-content;
  font-size: 0.76rem;
  font-weight: 650;
  line-height: 1;
  color: rgba(255, 255, 255, 0.94);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.22);
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

/* 文本卡片的金色顶栏亮度高，使用深色文字保持标题和时间清晰 */
.message.paste-card.variant-text .paste-card-type-label,
.message.paste-card.variant-text .paste-card-header-time {
  color: #3f2a00;
  text-shadow: none;
}

/* 备注标题在存在时仍覆盖标题区域，保持可点击编辑 */
.paste-card-title {
  font-size: clamp(0.64rem, calc(0.82rem * var(--card-scale, 1)), 0.94rem);
  font-weight: 700;
  line-height: 1.2;
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  cursor: pointer;
  letter-spacing: 0.01em;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.22);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  left: 0;
  right: 0;
}

.paste-card-title:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.message-header-right {
  position: relative;
  display: flex;
  align-items: stretch;
  justify-content: flex-end;
  flex-shrink: 0;
  height: 100%;
}

/* 右上角出血裁切式 (Bleed & Clipped) Apple 拟物应用大角标：常驻展示，100% 撑满顶栏高度，紧贴顶边/右边/底边并沿卡片右上圆角自然裁切；鼠标移入卡片时右上角图标同步灵动缩放 */
.paste-header-corner-app {
  height: 100%;
  aspect-ratio: 60 / 50;
  display: flex;
  align-items: stretch;
  justify-content: flex-end;
  flex-shrink: 0;
  border-top-right-radius: calc(var(--card-r, 16px) - 1px);
  overflow: hidden;
  pointer-events: none;
}

.paste-header-corner-app svg {
  width: 100%;
  height: 100%;
  display: block;
  transform-origin: top right;
  transition: transform 0.24s cubic-bezier(0.22, 1, 0.36, 1), filter 0.24s ease;
}

.message.paste-card:hover .paste-header-corner-app svg,
.message.paste-card:focus-within .paste-header-corner-app svg {
  transform: scale(0.86);
}

/* 顶部左侧高对比度纯白珠光操作胶囊组（仅保留：收藏、复制、删除） */
.message-actions {
  display: inline-flex;
  align-items: center;
  gap: clamp(3px, calc(5px * var(--card-scale, 1)), 6px);
}

.message-header .card-icon-btn {
  width: clamp(18px, calc(24px * var(--card-scale, 1)), 26px);
  height: clamp(18px, calc(24px * var(--card-scale, 1)), 26px);
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.95);
  background: rgba(255, 255, 255, 0.92);
  color: color-mix(in srgb, var(--paste-icon-fg, #1D1D1F) 78%, #0F172A 22%);
  border-radius: clamp(5px, calc(7px * var(--card-scale, 1)), 8px);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.16), 0 1px 2px rgba(15, 23, 42, 0.08);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.18s cubic-bezier(0.22, 1, 0.36, 1), background-color 0.16s ease, color 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
}

.message-header .card-icon-btn svg {
  width: clamp(10px, calc(13px * var(--card-scale, 1)), 14px);
  height: clamp(10px, calc(13px * var(--card-scale, 1)), 14px);
  transition: transform 0.18s cubic-bezier(0.22, 1, 0.36, 1);
}

.message-header .card-icon-btn:hover {
  background: #FFFFFF;
  color: var(--paste-icon-fg, #0066D6);
  transform: translateY(-1px) scale(1.1);
  box-shadow: 0 4px 10px rgba(15, 23, 42, 0.22);
}

.message-header .card-icon-btn:active {
  transform: translateY(0) scale(0.95);
}

/* 收藏按钮激活态：暖金琥珀色高对比显示 */
.message-header .card-icon-btn.message-favorite-action.active {
  background: #FFFBEB;
  border-color: #FDE68A;
  color: #EA580C;
}

.message-header .card-icon-btn.message-favorite-action:hover {
  color: #F59E0B;
}

/* 删除按钮悬停态与展开态：醒目的珊瑚绯红警示色 */
.message-header .card-icon-btn.card-danger-action:hover,
.message-header .card-icon-btn.card-danger-action[aria-expanded="true"] {
  background: #FFF1F2;
  border-color: #FECDD3;
  color: #E11D48;
}

/* 删除按钮内联二次确认弹出胶囊 */
.card-delete-wrapper {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.card-delete-confirm-pop {
  position: absolute;
  left: calc(100% + 5px);
  top: 50%;
  transform: translateY(-50%);
  z-index: 30;
  display: inline-flex;
  align-items: center;
  animation: deletePopSlideIn 0.16s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes deletePopSlideIn {
  from {
    opacity: 0;
    transform: translateY(-50%) translateX(-6px) scale(0.92);
  }
  to {
    opacity: 1;
    transform: translateY(-50%) translateX(0) scale(1);
  }
}

.card-delete-confirm-btn {
  height: clamp(18px, calc(24px * var(--card-scale, 1)), 26px);
  padding: 0 clamp(7px, calc(9px * var(--card-scale, 1)), 11px);
  border-radius: clamp(5px, calc(7px * var(--card-scale, 1)), 8px);
  border: 1px solid rgba(255, 255, 255, 0.92);
  background: linear-gradient(180deg, #FF4752 0%, #E11D48 100%);
  color: #FFFFFF;
  font-size: clamp(0.6rem, calc(0.72rem * var(--card-scale, 1)), 0.78rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: 0 3px 10px rgba(225, 29, 72, 0.35), 0 1px 2px rgba(15, 23, 42, 0.14);
  transition: transform 0.15s cubic-bezier(0.22, 1, 0.36, 1), filter 0.15s ease, box-shadow 0.15s ease;
}

.card-delete-confirm-btn:hover {
  filter: brightness(1.08);
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(225, 29, 72, 0.45);
}

.card-delete-confirm-btn:active {
  transform: scale(0.96);
}

@media (hover: hover) and (pointer: fine) {
  .message-header .message-actions {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%) translateX(-4px) scale(0.94);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.18s ease, transform 0.2s cubic-bezier(0.22, 1, 0.36, 1);
  }
  /* hover 时双行文字淡出，actions 浮现 */
  .message:hover .paste-card-type-label,
  .message:focus-within .paste-card-type-label,
  .message:hover .paste-card-header-time,
  .message:focus-within .paste-card-header-time {
    opacity: 0;
    pointer-events: none;
  }
  /* 有备注时 hover 隐藏备注标题，actions 浮现 */
  .message:hover .paste-card-title,
  .message:focus-within .paste-card-title {
    opacity: 0;
    pointer-events: none;
  }
  .message:hover .message-header .message-actions,
  .message:focus-within .message-header .message-actions {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(-50%) translateX(0) scale(1);
  }
}

/* 已复制状态反馈：高对比度翠绿白底胶囊 */
.btn-copied {
  background: #ECFDF5 !important;
  border-color: #A7F3D0 !important;
  color: #059669 !important;
}

/* 卡片更多操作下拉菜单（从顶部左侧工具栏向下展开） */
.card-more-wrapper {
  position: relative;
  display: inline-flex;
}

.card-more-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  min-width: 148px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-popover);
  padding: 4px;
  z-index: 95;
  display: flex;
  flex-direction: column;
  gap: 2px;
  animation: fadeScaleIn var(--transition-fast);
  transform-origin: top left;
}

.card-menu-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 6px 10px;
  border: none;
  border-radius: var(--radius-xs);
  background: transparent;
  color: var(--text-primary);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: background-color var(--transition-fast);
}

.card-menu-item:hover {
  background: var(--bg-hover);
}

.card-menu-item.danger {
  color: var(--danger);
}

.card-menu-item.danger:hover {
  background: var(--danger-soft);
}

/* ==========================================================================
   卡片正文：文本、代码、图片与文件
   ========================================================================== */

.message-content {
  word-break: break-word;
  white-space: pre-wrap;
  user-select: none;
  -webkit-user-select: none;
  cursor: pointer;
  flex: 1 1 auto;
  min-height: 0;
}

.message-content.text {
  font-size: clamp(0.55rem, calc(0.86rem * var(--card-scale, 1)), 1.05rem);
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--paste-body-bg, var(--bg-surface));
  position: relative;
  padding: clamp(4px, calc(10px * var(--card-scale, 1)), 14px)
           clamp(5px, calc(12px * var(--card-scale, 1)), 16px);
  border-radius: 0 0 calc(var(--card-r, 14px) - 1px) calc(var(--card-r, 14px) - 1px);
  overflow: hidden;
}

.message-content.text::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: clamp(10px, calc(22px * var(--card-scale, 1)), 28px);
  background: linear-gradient(to bottom, transparent, var(--paste-body-bg, var(--bg-surface)) 92%);
  pointer-events: none;
}

/* 明确独立的展开/收起按钮，避免点击或选中文本时误触 */
.message-expand-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2px;
}

.message-expand-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: transparent;
  border: none;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  padding: 2px 6px;
  margin-left: -6px;
  border-radius: var(--radius-xs);
  transition: background-color var(--transition-fast);
}

.message-expand-btn:hover {
  background: var(--accent-soft);
}

/* 代码块与代码卡片：移除难看的卡片内滚动条，与 Paste 一致采用无滚动条等宽预览 + 底部渐变遮罩 */
.message.paste-card.variant-code .message-content.text {
  font-family: var(--font-mono);
  font-size: clamp(0.52rem, calc(0.78rem * var(--card-scale, 1)), 0.94rem);
  line-height: 1.48;
  background: var(--paste-body-bg);
  tab-size: 2;
}

.message.paste-card.variant-code .message-content.text::after {
  background: linear-gradient(to bottom, transparent, var(--paste-body-bg) 88%);
}

.code-block-wrapper {
  position: relative;
  margin: 4px 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--bg-code);
  overflow: hidden;
}

/* 当卡片本身就是代码卡片时，内部 ``` 代码块无需再套一层内边框和背景，直接铺满卡片更纯粹 */
.message.paste-card.variant-code .code-block-wrapper {
  margin: 0;
  border: none;
  border-radius: 0;
  background: transparent;
}

.code-block {
  background: transparent;
  padding: 8px 10px;
  font-family: var(--font-mono);
  font-size: clamp(0.52rem, calc(0.78rem * var(--card-scale, 1)), 0.94rem);
  line-height: 1.48;
  overflow: hidden;
  scrollbar-width: none;
  margin: 0;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-word;
  tab-size: 2;
}

.message.paste-card.variant-code .code-block {
  padding: 0;
}

.code-block::-webkit-scrollbar {
  display: none;
}

/* 在全文查看弹窗中打开时允许代码块完整滚动阅读 */
.viewer-body .code-block {
  overflow: auto;
  max-height: none;
  white-space: pre;
}

.inline-code {
  background: var(--bg-subtle);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.82em;
}

/* 图片卡片：在彩色标题栏下方零留白满幅铺满 (Paste Full-Bleed Image) */
.message-content.image {
  cursor: zoom-in;
  display: flex;
  justify-content: center;
  align-items: center;
  background: var(--bg-subtle);
  border-radius: 0 0 calc(var(--card-r, 14px) - 1px) calc(var(--card-r, 14px) - 1px);
  border: none;
  overflow: hidden;
  position: relative;
  width: 100%;
  flex: 1 1 auto;
  height: calc(100% - var(--header-h, 44px));
}

.message-content.image.is-loaded {
  height: calc(100% - var(--header-h, 44px));
}

.message-content.image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: opacity var(--transition-fast), transform var(--transition-normal);
}

.message.paste-card:hover .message-content.image img {
  transform: scale(1.02);
}

.message-image.loading {
  opacity: 0;
  position: absolute;
}

.image-placeholder {
  width: 100%;
  height: 100%;
  min-height: 120px;
  padding: var(--space-3);
  background: var(--bg-subtle);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
}

/* 链接卡片：还原 Paste 官网上封面图 + 下方白底加粗标题与域名的结构 */
.message-content.text.is-link-card {
  padding: 0;
  display: flex;
  flex-direction: column;
}

.message-content.text.is-link-card::after {
  display: none;
}

.paste-link-banner {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  background: linear-gradient(135deg, #E0F2FE 0%, #DBEAFE 50%, #F0FDF4 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

:root[data-theme="dark"] .paste-link-banner {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.18) 0%, rgba(40, 200, 80, 0.14) 100%);
}

.paste-link-banner-orb {
  position: absolute;
  width: 120%;
  height: 140%;
  background: radial-gradient(circle at 30% 40%, rgba(40, 200, 80, 0.22), transparent 55%),
              radial-gradient(circle at 75% 65%, rgba(26, 140, 255, 0.24), transparent 60%);
  pointer-events: none;
}

.paste-link-favicon {
  position: relative;
  z-index: 1;
  width: clamp(28px, calc(46px * var(--card-scale, 1)), 54px);
  height: clamp(28px, calc(46px * var(--card-scale, 1)), 54px);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.08);
  color: #1A8CFF;
  display: flex;
  align-items: center;
  justify-content: center;
}

:root[data-theme="dark"] .paste-link-favicon {
  background: rgba(30, 41, 59, 0.88);
  color: #38BDF8;
}

.paste-link-footer {
  padding: clamp(6px, calc(10px * var(--card-scale, 1)), 13px)
           clamp(8px, calc(12px * var(--card-scale, 1)), 15px);
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}

.paste-link-title {
  font-size: clamp(0.6rem, calc(0.82rem * var(--card-scale, 1)), 0.92rem);
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.paste-link-domain {
  font-size: clamp(0.54rem, calc(0.72rem * var(--card-scale, 1)), 0.8rem);
  font-weight: 500;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 文件卡片：还原 Paste 官网第三排第 3 张（微灰底 + 折角立体文档纸页 + 底部居中路径名） */
.message-content.file {
  border: none;
  background: var(--paste-body-bg, var(--bg-surface));
  border-radius: 0 0 calc(var(--card-r, 14px) - 1px) calc(var(--card-r, 14px) - 1px);
  padding: clamp(6px, calc(14px * var(--card-scale, 1)), 18px)
           clamp(6px, calc(14px * var(--card-scale, 1)), 18px)
           clamp(6px, calc(10px * var(--card-scale, 1)), 14px);
  white-space: normal;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  text-align: center;
  gap: clamp(4px, calc(8px * var(--card-scale, 1)), 10px);
  flex: 1 1 auto;
  overflow: hidden;
}

.paste-doc-sheet {
  position: relative;
  width: clamp(36px, calc(66px * var(--card-scale, 1)), 78px);
  height: clamp(44px, calc(80px * var(--card-scale, 1)), 94px);
  margin: auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 4px 10px rgba(15, 23, 42, 0.08));
}

.paste-doc-sheet svg {
  width: 100%;
  height: 100%;
  display: block;
}

.paste-doc-ext {
  position: absolute;
  bottom: clamp(6px, calc(11px * var(--card-scale, 1)), 14px);
  left: 0;
  right: 0;
  text-align: center;
  font-size: clamp(0.5rem, calc(0.76rem * var(--card-scale, 1)), 0.88rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #98A2B3;
}

.file-name {
  font-size: clamp(0.54rem, calc(0.74rem * var(--card-scale, 1)), 0.84rem);
  color: var(--text-muted);
  font-weight: 500;
  word-break: break-all;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* 当缩放到像手机相册那样的超小微缩格 (micro: < 140px / compact: < 210px) 时自动精简次要文字，保持画面干净 */
:root[data-card-density="micro"] .message-time,
:root[data-card-density="micro"] .paste-card-meta,
:root[data-card-density="micro"] .paste-card-title,
:root[data-card-density="micro"] .paste-card-type-label,
:root[data-card-density="micro"] .paste-card-header-time {
  display: none !important;
}

:root[data-card-density="compact"] .message-time,
:root[data-card-density="compact"] .paste-card-header-time {
  font-size: 0.76rem;
}

/* Paste 底部参数栏：常驻展示，与当前卡片同色调的轻透毛玻璃遮罩（左侧展示字符/分辨率/大小参数） */
.paste-card-meta {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: clamp(22px, calc(28px * var(--card-scale, 1)), 32px);
  padding: 0 clamp(8px, calc(12px * var(--card-scale, 1)), 14px);
  border-radius: 0 0 calc(var(--card-r, 14px) - 1px) calc(var(--card-r, 14px) - 1px);
  background: color-mix(in srgb, var(--paste-body-bg, var(--bg-surface)) 82%, var(--paste-accent-color, #6366F1) 18%);
  border-top: 1px solid color-mix(in srgb, var(--paste-accent-color, #6366F1) 18%, transparent);
  backdrop-filter: saturate(160%) blur(8px);
  -webkit-backdrop-filter: saturate(160%) blur(8px);
  z-index: 4;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  pointer-events: none;
  opacity: 1;
  transition: opacity var(--transition-fast);
}

.paste-card-meta-text {
  font-size: clamp(0.64rem, calc(0.75rem * var(--card-scale, 1)), 0.82rem);
  font-weight: 600;
  color: var(--paste-meta-fg, var(--text-primary));
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

.paste-card-meta .message-time {
  font-size: clamp(0.62rem, calc(0.72rem * var(--card-scale, 1)), 0.78rem);
  font-weight: 600;
  color: var(--paste-meta-fg, var(--text-secondary));
  opacity: 0.88;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  flex-shrink: 0;
  margin-left: auto;
}

.message-audio {
  display: block;
  width: 100%;
  margin-top: 6px;
}

.message-video {
  display: block;
  max-width: 100%;
  max-height: 220px;
  border-radius: var(--radius-xs);
  margin-top: 6px;
  background-color: #000;
}

/* 备注胶囊：悬浮在底部遮罩层左侧 */
.message-remark-box {
  padding: 3px 8px;
  background: color-mix(in srgb, var(--bg-surface-elevated) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-left: 2px solid var(--accent);
  border-radius: var(--radius-xs);
  font-size: 0.72rem;
  line-height: 1.35;
  color: var(--text-secondary);
  cursor: pointer;
  pointer-events: auto;
  max-width: calc(100% - 96px);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: background-color var(--transition-fast);
}

.message-remark-box:hover {
  background: var(--accent-soft);
}

.message-remark-label {
  font-weight: 600;
  color: var(--text-muted);
  margin-right: 4px;
  user-select: none;
}

.message-remark-text {
  color: var(--text-primary);
  white-space: pre-wrap;
}

/* ==========================================================================
   底部输入坞 (Composer Dock) & 上传进度条
   ========================================================================== */

.upload-progress-bar {
  max-width: 760px;
  width: calc(100% - 32px);
  margin: 0 auto var(--space-2);
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  box-shadow: var(--shadow-card);
}

.upload-progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.upload-progress-track {
  width: 100%;
  height: 4px;
  background: var(--bg-subtle);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.upload-progress-fill {
  width: 0%;
  height: 100%;
  background: var(--accent);
  transition: width 120ms linear;
}

.input-area.floating-composer-drawer {
  width: min(640px, calc(100vw - 28px));
  padding: 0;
  background: transparent;
  border: none;
  animation: fadeScaleIn var(--transition-fast);
}

.composer-shell {
  width: 100%;
}

.input-row {
  display: flex;
  gap: var(--space-2);
  align-items: flex-end;
  background: color-mix(in srgb, var(--bg-surface-elevated) 92%, transparent);
  backdrop-filter: saturate(190%) blur(22px);
  -webkit-backdrop-filter: saturate(190%) blur(22px);
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  padding: 6px 8px 6px 14px;
  box-shadow: var(--shadow-popover);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.dock-close-input-btn {
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.dock-close-input-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.input-row:focus-within {
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
}

#text-input {
  flex: 1;
  padding: 5px 0;
  border: none;
  font-size: 0.9rem;
  resize: none;
  font-family: inherit;
  max-height: 110px;
  min-height: 28px;
  height: 28px;
  line-height: 1.45;
  background: transparent;
  color: var(--text-primary);
  outline: none;
}

#text-input:focus-visible {
  box-shadow: none;
}

#text-input::placeholder {
  color: var(--text-muted);
}

.composer-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.send-btn {
  height: 30px;
  padding: 0 14px;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   回到底部 / 新内容浮动提醒按钮
   ========================================================================== */

.scroll-bottom-btn {
  position: absolute;
  bottom: 68px;
  right: var(--space-6);
  background: var(--bg-surface-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-full);
  padding: 6px 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: var(--shadow-popover);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  z-index: 40;
  transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.scroll-bottom-btn:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
  color: var(--accent);
}

.scroll-bottom-btn.has-new {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
}

/* ==========================================================================
   通用按钮系统 (Buttons)
   ========================================================================== */

.btn {
  padding: 7px 14px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
  font-family: inherit;
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  user-select: none;
}

.btn-primary {
  background: var(--accent);
  color: #FFFFFF;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-primary:active:not(:disabled) {
  background: var(--accent-active);
}

.btn-secondary {
  background: var(--bg-subtle);
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--border-strong);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-danger {
  background: var(--danger);
  color: #FFFFFF;
}

.btn-danger:hover:not(:disabled) {
  background: var(--danger-hover);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-icon {
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ==========================================================================
   全屏拖拽层 (Drop Overlay)
   ========================================================================== */

.drop-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 5000;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  animation: fadeIn var(--transition-fast);
}

.drop-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  background: var(--bg-surface);
  padding: var(--space-8) 48px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  border: 1.5px dashed var(--accent);
  text-align: center;
}

.drop-icon {
  color: var(--accent);
  margin-bottom: var(--space-1);
}

.drop-text {
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 600;
}

.drop-subtext {
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* ==========================================================================
   Toast 轻提示（不遮挡主要内容，支持错误重试动作）
   ========================================================================== */

.toast {
  position: fixed;
  bottom: 72px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text-primary);
  color: var(--text-inverse);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  z-index: 6000;
  box-shadow: var(--shadow-popover);
  font-size: 0.82rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  max-width: calc(100vw - 32px);
  animation: toastSlideUp var(--transition-normal);
}

.toast-action {
  background: rgba(255, 255, 255, 0.18);
  color: inherit;
  border: none;
  border-radius: var(--radius-full);
  padding: 3px 10px;
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
}

.toast-action:hover {
  background: rgba(255, 255, 255, 0.28);
}

@keyframes toastSlideUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeScaleIn {
  from {
    opacity: 0;
    transform: scale(0.97) translateY(-2px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* ==========================================================================
   模态弹窗与查看器 (Modals & Viewers)
   ========================================================================== */

.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.22);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 4000;
  padding: var(--space-4);
  animation: fadeIn var(--transition-fast);
}

#text-viewer.modal,
#image-viewer.modal,
#file-viewer.modal {
  background: transparent;
}

.modal-content {
  background: var(--bg-surface);
  border: 1px solid var(--border-strong);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-modal);
  max-width: 380px;
  width: 100%;
  animation: fadeScaleIn var(--transition-normal);
}

.modal-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.modal-content p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.55;
}

.modal-actions {
  display: flex;
  gap: var(--space-2);
  justify-content: flex-end;
}

#enrollment-modal .modal-content, #security-modal .modal-content { max-height: calc(100dvh - 32px); overflow-y: auto; }
#security-modal .modal-content { max-width: 480px; }
#security-modal input, #security-modal select, #enrollment-code {
  width: 100%; min-height: 38px; padding: 8px 10px; border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm); background: var(--bg-subtle); color: var(--text-primary); font: inherit;
}
#security-modal input:focus, #security-modal select:focus, #enrollment-code:focus { outline: none; border-color: var(--accent); box-shadow: var(--focus-ring); }
#security-modal .auth-label { margin: 10px 0 5px; }
#security-modal .modal-actions { flex-wrap: wrap; justify-content: flex-start; margin-top: 12px; }
#security-modal .modal-actions .btn { font-size: 0.8rem; }
#security-modal .modal-content p { margin-bottom: 12px; overflow-wrap: anywhere; }
.verification-preferences { padding: 14px; margin: 12px 0 18px; border: 1px solid var(--border-subtle); border-radius: var(--radius-md); background: var(--bg-subtle); }
.verification-preferences h4 { font-size: 0.9rem; margin-bottom: 6px; }
#security-modal .verification-preferences p { font-size: 0.8rem; color: var(--text-secondary); }
.verification-code-row { display: flex; align-items: center; gap: 8px; }
.verification-code-row input { min-width: 0; flex: 1; }
.verification-code-row .btn { flex-shrink: 0; font-size: 0.78rem; }
#verification-new-email { margin-top: 14px; padding-top: 4px; border-top: 1px solid var(--border-strong); }
#verification-confirm-email, #security-reauth-btn { margin-top: 10px; }
#security-sessions .popover-meta-item { gap: 8px; margin: 8px 0; }
#security-history .popover-meta-item { overflow-wrap: anywhere; }
#enrollment-qr, #security-factor-qr { display: block; max-width: 100%; height: auto; margin: 12px auto; }
#enrollment-secret { overflow-wrap: anywhere; }
#enrollment-codes { font-size: 0.8rem; overflow-x: auto; margin: 12px 0; }

/* 大图上传提示弹窗 */
.image-compress-modal-content {
  max-width: 400px;
}

.image-compress-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.image-compress-actions .btn {
  width: 100%;
}

/* 备注弹窗 */
.remark-modal-content {
  max-width: 460px;
}

.remark-modal-preview {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: var(--space-3) !important;
  padding: 6px 10px;
  background: var(--bg-subtle);
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-subtle);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.remark-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.remark-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  line-height: 1.5;
  resize: vertical;
  min-height: 92px;
  max-height: 220px;
  font-family: inherit;
  background: var(--bg-subtle);
  color: var(--text-primary);
}

.remark-textarea:focus {
  outline: none;
  background: var(--bg-surface);
  border-color: var(--accent);
  box-shadow: var(--focus-ring);
}

.remark-counter-row {
  display: flex;
  justify-content: flex-end;
}

.remark-char-count {
  font-size: 0.74rem;
  color: var(--text-muted);
}

.remark-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.remark-actions .btn-danger {
  margin-right: auto;
}

/* ==========================================================================
   五大分类专属背景遮罩层 (Category-Tinted Modal Backdrops - 轻透柔光毛玻璃)
   ========================================================================== */
.image-viewer-backdrop,
.text-viewer-backdrop,
.file-viewer-backdrop {
  position: absolute;
  inset: 0;
  cursor: pointer;
  backdrop-filter: saturate(165%) blur(14px);
  -webkit-backdrop-filter: saturate(165%) blur(14px);
  background: rgba(248, 250, 252, 0.28);
  transition: background-color var(--transition-fast);
}

/* 文本弹窗遮罩：阳光备忘录黄轻透毛玻璃 */
.modal.variant-text .text-viewer-backdrop {
  background: radial-gradient(circle at 50% 35%, rgba(255, 204, 0, 0.2) 0%, rgba(255, 251, 235, 0.34) 100%);
}

/* 代码弹窗遮罩：Xcode 苹果蓝轻透毛玻璃 */
.modal.variant-code .text-viewer-backdrop {
  background: radial-gradient(circle at 50% 35%, rgba(0, 122, 255, 0.18) 0%, rgba(239, 246, 255, 0.34) 100%);
}

/* 链接弹窗遮罩：Apple 翠绿轻透毛玻璃 */
.modal.variant-link .text-viewer-backdrop {
  background: radial-gradient(circle at 50% 35%, rgba(52, 199, 89, 0.18) 0%, rgba(240, 253, 244, 0.34) 100%);
}

/* 图片弹窗遮罩：Logo 洋红绯红轻透毛玻璃 */
.modal.variant-image .image-viewer-backdrop {
  background: radial-gradient(circle at 50% 35%, rgba(255, 45, 85, 0.18) 0%, rgba(255, 241, 242, 0.34) 100%);
}

/* 文件弹窗遮罩：Logo 活力暖橙轻透毛玻璃 */
.modal.variant-file .file-viewer-backdrop {
  background: radial-gradient(circle at 50% 35%, rgba(255, 111, 26, 0.18) 0%, rgba(255, 247, 237, 0.34) 100%);
}

:root[data-theme="dark"] .modal.variant-text .text-viewer-backdrop {
  background: radial-gradient(circle at 50% 35%, rgba(255, 214, 10, 0.2) 0%, rgba(17, 17, 20, 0.38) 100%);
}
:root[data-theme="dark"] .modal.variant-code .text-viewer-backdrop {
  background: radial-gradient(circle at 50% 35%, rgba(10, 132, 255, 0.2) 0%, rgba(17, 17, 20, 0.4) 100%);
}
:root[data-theme="dark"] .modal.variant-link .text-viewer-backdrop {
  background: radial-gradient(circle at 50% 35%, rgba(48, 209, 88, 0.2) 0%, rgba(17, 17, 20, 0.38) 100%);
}
:root[data-theme="dark"] .modal.variant-image .image-viewer-backdrop {
  background: radial-gradient(circle at 50% 35%, rgba(255, 55, 95, 0.22) 0%, rgba(17, 17, 20, 0.4) 100%);
}
:root[data-theme="dark"] .modal.variant-file .file-viewer-backdrop {
  background: radial-gradient(circle at 50% 35%, rgba(255, 122, 26, 0.22) 0%, rgba(17, 17, 20, 0.4) 100%);
}

/* 文本 / 代码 / 链接 / 图片 / 文件 Quick Look 主题查看弹窗（继承卡片的五色渐变头与微色调背景） */
.paste-modal-card {
  --modal-header-bg: var(--paste-grad-text);
  --modal-accent: var(--paste-color-text);
  --modal-body-bg: color-mix(in srgb, var(--bg-surface) 96.5%, var(--paste-color-text) 3.5%);
  --modal-border-tint: color-mix(in srgb, var(--border-strong) 72%, var(--paste-color-text) 28%);
}

.paste-modal-card.variant-code {
  --modal-header-bg: var(--paste-grad-code);
  --modal-accent: var(--paste-color-code);
  --modal-body-bg: color-mix(in srgb, var(--bg-surface) 96%, var(--paste-color-code) 4%);
  --modal-border-tint: color-mix(in srgb, var(--border-strong) 70%, var(--paste-color-code) 30%);
}

.paste-modal-card.variant-link {
  --modal-header-bg: var(--paste-grad-link);
  --modal-accent: var(--paste-color-link);
  --modal-body-bg: color-mix(in srgb, var(--bg-surface) 96%, var(--paste-color-link) 4%);
  --modal-border-tint: color-mix(in srgb, var(--border-strong) 70%, var(--paste-color-link) 30%);
}

.paste-modal-card.variant-image {
  --modal-header-bg: var(--paste-grad-image);
  --modal-accent: var(--paste-color-image);
  --modal-body-bg: color-mix(in srgb, var(--bg-surface) 96%, var(--paste-color-image) 4%);
  --modal-border-tint: color-mix(in srgb, var(--border-strong) 70%, var(--paste-color-image) 30%);
}

.paste-modal-card.variant-file {
  --modal-header-bg: var(--paste-grad-file);
  --modal-accent: var(--paste-color-file);
  --modal-body-bg: color-mix(in srgb, var(--bg-surface) 96%, var(--paste-color-file) 4%);
  --modal-border-tint: color-mix(in srgb, var(--border-strong) 70%, var(--paste-color-file) 30%);
}

.image-viewer-container,
.text-viewer-container,
.file-viewer-container {
  position: relative;
  display: flex;
  flex-direction: column;
  width: 92vw;
  max-width: 820px;
  max-height: 84vh;
  background: var(--modal-body-bg, var(--bg-surface));
  border: 1px solid var(--modal-border-tint, var(--border-strong));
  border-radius: 18px;
  box-shadow: var(--shadow-modal);
  z-index: 1;
  overflow: hidden;
  animation: fadeScaleIn var(--transition-normal);
}

.image-viewer-container {
  max-width: 900px;
}

.image-viewer-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 360px;
  max-height: calc(84vh - 40px);
  padding: 20px;
  overflow: hidden;
  cursor: grab;
  user-select: none;
  background:
    radial-gradient(circle at center, color-mix(in srgb, var(--modal-body-bg) 92%, var(--paste-color-image) 8%) 0%, var(--modal-body-bg) 100%);
}

.image-viewer-stage.is-grabbing {
  cursor: grabbing;
}

.image-viewer-img {
  max-width: 100%;
  max-height: calc(84vh - 80px);
  border-radius: 8px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.16);
  object-fit: contain;
  transform-origin: center center;
  will-change: transform;
  pointer-events: none;
}

.paste-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 40px;
  min-height: 40px;
  padding: 0 14px;
  background: var(--modal-header-bg);
  color: #ffffff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  flex-shrink: 0;
  gap: 10px;
}

.text-viewer-title-info,
.file-viewer-title-info {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  flex: 1;
}

.paste-modal-type-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: #ffffff;
  flex-shrink: 0;
}

.paste-modal-type-icon svg {
  width: 14px;
  height: 14px;
}

.text-viewer-title,
.file-viewer-title {
  margin: 0;
  font-size: 0.86rem;
  font-weight: 600;
  color: #ffffff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.text-viewer-meta,
.file-viewer-meta {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.86);
  background: rgba(0, 0, 0, 0.15);
  padding: 1px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.paste-modal-header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.file-viewer-lang {
  font-size: 0.68rem;
  font-weight: 600;
  color: #ffffff;
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 6px;
  padding: 2px 7px;
}

.paste-modal-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  height: 26px;
  padding: 0 10px;
  border-radius: 7px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.18);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.paste-modal-action-btn.primary {
  background: rgba(0, 0, 0, 0.22);
  border-color: rgba(255, 255, 255, 0.34);
}

.paste-modal-action-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

.paste-modal-action-btn.primary:hover {
  background: rgba(0, 0, 0, 0.34);
}

.text-viewer-body,
.file-viewer-body {
  padding: 22px 24px;
  overflow-y: auto;
  flex-grow: 1;
  background: var(--modal-body-bg, var(--bg-surface));
}

.text-viewer-content {
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text-primary);
  word-break: break-word;
  white-space: pre-wrap;
  user-select: text;
}

/* 代码分类弹窗专属样式：等宽代码块排版 */
.text-viewer-content.is-code-view .viewer-code-pre {
  margin: 0;
  padding: 16px 18px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--bg-code) 90%, var(--paste-color-code) 10%);
  border: 1px solid color-mix(in srgb, var(--border-subtle) 75%, var(--paste-color-code) 25%);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
  tab-size: 2;
}

/* 链接分类弹窗专属样式：域名徽标 + 大号可点击网址卡片 */
.viewer-link-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--bg-surface) 90%, var(--paste-color-link) 10%);
  border: 1px solid color-mix(in srgb, var(--border-subtle) 72%, var(--paste-color-link) 28%);
}

.viewer-link-host {
  display: inline-flex;
  align-self: flex-start;
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #1F9E40;
  background: rgba(52, 199, 89, 0.14);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

:root[data-theme="dark"] .viewer-link-host {
  color: #30D158;
  background: rgba(48, 209, 88, 0.18);
}

.viewer-link-url {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(52, 199, 89, 0.45);
}

.viewer-link-url:hover {
  color: #1F9E40;
}

:root[data-theme="dark"] .viewer-link-url:hover {
  color: #30D158;
}

/* 非文本二进制文件详情卡片展示 */
.file-viewer-card-summary {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 28px 20px;
  gap: 12px;
}

.file-summary-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: color-mix(in srgb, var(--bg-surface) 84%, var(--paste-color-file) 16%);
  border: 1px solid color-mix(in srgb, var(--border-subtle) 68%, var(--paste-color-file) 32%);
  color: var(--paste-color-file);
  display: flex;
  align-items: center;
  justify-content: center;
}

.file-summary-icon svg {
  width: 32px;
  height: 32px;
}

.file-summary-name {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
}

.file-summary-meta {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.file-viewer-content {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-word;
  user-select: text;
}

.file-viewer-content.md-body {
  font-family: var(--font-sans);
  font-size: 0.92rem;
  white-space: normal;
}

.file-viewer-notice {
  padding: 8px var(--space-6);
  background: var(--warning-soft);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--warning-text);
  font-size: 0.78rem;
}

.text-viewer-actions,
.file-viewer-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-top: 1px solid var(--modal-border-tint, var(--border-subtle));
  background: color-mix(in srgb, var(--modal-body-bg, var(--bg-subtle)) 88%, var(--modal-accent, #6366F1) 12%);
  flex-shrink: 0;
}

.paste-modal-card .btn-primary {
  background: var(--modal-header-bg);
  border-color: transparent;
}

/* ==========================================================================
   链接与语法高亮配色
   ========================================================================== */

.message-link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: var(--accent-border);
  word-break: break-all;
}

.message-link:hover {
  text-decoration-color: var(--accent);
}

/* Paste 官网风格语法高亮配色（紫红关键字 + 蓝绿类型/字符串） */
.tok-key { color: #0284C7; }
.tok-string { color: #0D9488; }
.tok-number { color: #2563EB; }
.tok-keyword { color: #C026D3; font-weight: 600; }
.tok-comment { color: var(--text-muted); font-style: italic; }
.tok-bool { color: #C026D3; }
.tok-fn { color: #0284C7; }
.tok-punct { color: var(--text-secondary); }

:root[data-theme="dark"] .tok-key { color: #FBBF24; }
:root[data-theme="dark"] .tok-string { color: #4ADE80; }
:root[data-theme="dark"] .tok-number { color: #F472B6; }
:root[data-theme="dark"] .tok-bool { color: #FB923C; }
:root[data-theme="dark"] .tok-fn { color: #60A5FA; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .tok-key { color: #FBBF24; }
  :root:not([data-theme="light"]) .tok-string { color: #4ADE80; }
  :root:not([data-theme="light"]) .tok-number { color: #F472B6; }
  :root:not([data-theme="light"]) .tok-bool { color: #FB923C; }
  :root:not([data-theme="light"]) .tok-fn { color: #60A5FA; }
}

.md-body .md-h1, .md-body .md-h2, .md-body .md-h3 {
  color: var(--text-primary);
  margin: 16px 0 8px;
  line-height: 1.3;
}
.md-body .md-h1 { font-size: 1.4rem; border-bottom: 1px solid var(--border-subtle); padding-bottom: 6px; }
.md-body .md-h2 { font-size: 1.2rem; border-bottom: 1px solid var(--border-subtle); padding-bottom: 4px; }
.md-body .md-h3 { font-size: 1.05rem; }
.md-body .md-p { margin: 8px 0; line-height: 1.65; }
.md-body .md-ul { margin: 8px 0; padding-left: 20px; }
.md-body .md-quote {
  margin: 10px 0;
  padding: 6px 14px;
  border-left: 3px solid var(--accent);
  color: var(--text-secondary);
  background: var(--bg-subtle);
}
.md-body .md-pre {
  background: var(--bg-code);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  overflow-x: auto;
  margin: 10px 0;
}

/* ==========================================================================
   平板与移动端响应式适配 (Responsive Breakpoints)
   ========================================================================== */

@media (max-width: 900px) {
  .workspace-scroll,
  .favorites-container {
    padding: var(--space-3) var(--space-4) var(--space-6);
  }

  .app-topbar {
    padding: 0 var(--space-4);
  }

  .app-topbar-inner {
    grid-template-columns: auto minmax(150px, 220px) auto;
    gap: var(--space-3);
  }

  .connection-pill .status {
    display: none;
  }
}

@media (max-width: 640px) {
  :root {
    --topbar-height: auto;
  }

  .app-topbar {
    padding: var(--space-2) var(--space-3);
  }

  .app-topbar-inner {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
  }

  .topbar-left {
    order: 1;
    flex: 1;
    gap: var(--space-2);
  }

  .topbar-right {
    order: 2;
  }

  .topbar-search-wrapper {
    order: 3;
    flex: 1 1 100%;
    max-width: 100%;
  }

  .search-kbd {
    display: none;
  }

  #card-width-section,
  .topbar-zoom-control {
    display: none;
  }

  .workspace-scroll,
  .favorites-container {
    padding: var(--space-3) var(--space-3) calc(148px + env(safe-area-inset-bottom, 0px));
  }

  /* ── 移动端：双列等宽网格，去掉时间轴偏移 ── */
  .messages-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding-left: 0;
  }

  /* 移动端隐藏时间轴主线 */
  .messages-list::before {
    display: none;
  }

  /* 触屏端操作按钮加大点击热区，始终清晰可见 */
  .card-action-btn {
    height: 30px;
    padding: 0 10px;
  }

  .card-icon-btn {
    width: 30px;
    height: 30px;
  }

  .input-area {
    padding: var(--space-2) var(--space-3);
  }

  .scroll-bottom-btn {
    right: var(--space-3);
    bottom: 62px;
  }

  /* ── 移动端卡片：内容驱动高度，去掉固定 height ── */
  .message.paste-card {
    height: auto;
    min-height: auto;
  }

  /* ── 移动端卡片：隐藏彩色头部色带，但保留按钮可访问性 ── */
  .message-header {
    height: 0;
    min-height: 0;
    padding: 0;
    overflow: visible;
    background: none;
    border-radius: 0;
    position: absolute;
    top: 6px;
    left: 6px;
    right: 6px;
    z-index: 8;
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
  }

  /* 移动端头部右侧（角标）也绝对定位到右上 */
  .message-header-right {
    position: absolute;
    right: 0;
    top: 0;
  }

  .paste-card-labels {
    gap: 6px;
    align-items: center;
  }

  .paste-card-type-label {
    max-width: calc(100% - 3.8em);
    font-size: 0.9rem;
  }

  .paste-card-header-time {
    font-size: 0.76rem;
  }

  .message.paste-card.variant-text .paste-card-type-label,
  .message.paste-card.variant-text .paste-card-header-time {
    color: var(--text-secondary);
    text-shadow: none;
  }

  /* 标签定位覆盖移动端内容层时，贴齐左侧并在卡片顶部色带高度内居中 */
  .paste-card-labels {
    position: absolute;
    top: 6px;
    left: 8px;
    right: 42px;
    height: 24px;
    z-index: 6;
    display: flex;
    flex-direction: row;
    align-items: center;
    background: transparent;
    pointer-events: none;
  }

  .paste-card-type-label {
    font-size: 0.9rem;
    font-weight: 750;
    line-height: 1;
  }

  .paste-card-header-time {
    font-size: 0.76rem;
    font-weight: 650;
    line-height: 1;
  }

  /* 纯文本卡：白底/黄底上叠加深色标签 */
  .message.paste-card.variant-text .paste-card-type-label,
  .message.paste-card.variant-text .paste-card-header-time {
    color: var(--text-secondary);
    text-shadow: none;
  }

  /* 移动端右上角 App 图标：从头部挪到内容叠加层 */
  .paste-header-corner-app {
    position: absolute;
    top: 6px;
    right: 6px;
    z-index: 6;
    width: 28px;
    height: 28px;
    aspect-ratio: 1;
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.18);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border: 1px solid rgba(255,255,255,0.28);
    pointer-events: none;
  }

  .paste-header-corner-app svg {
    width: 100%;
    height: 100%;
    transform: none !important;
  }

  /* 移动端卡片文字内容区：去掉内容驱动后的顶部 padding 补偿 */
  .message-content.text {
    padding-top: clamp(28px, 36px, 44px);
    font-size: 0.82rem;
    line-height: 1.5;
    max-height: 160px;
  }

  /* 移动端底部 meta 隐藏（小屏空间紧，信息在叠加标签中已有） */
  .paste-card-meta {
    display: none;
  }

  /* 移动端图片卡：满幅展示图片，圆角从顶部开始 */
  .message-content.image {
    height: 140px;
    min-height: 140px;
    border-radius: var(--card-r);
  }

  /* 移动端链接卡 banner 高度 */
  .paste-link-banner {
    min-height: 100px;
  }

  /* 移动端文件卡 icon 区域 */
  .file-icon-card {
    min-height: 100px;
  }

  /* 移动端操作按钮：始终显示在卡片右下角，使用深色半透明风格 */
  .message-header .message-actions {
    position: absolute;
    bottom: -6px;
    right: 0;
    top: auto;
    left: auto;
    transform: none;
    opacity: 1;
    pointer-events: auto;
    display: flex;
    flex-direction: row;
    gap: 4px;
  }

  /* 移动端操作按钮改为半透明深色风格，适配透明背景 */
  .message-header .card-icon-btn {
    width: 26px;
    height: 26px;
    background: rgba(15, 23, 42, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.22);
    color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
  }

  /* 移动端单列模式（layout-list）保持单列 */
  .messages-list.layout-list {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   移动端 FAB：一键保存剪切板（仅触屏设备显示）
   ══════════════════════════════════════════════════════════════════════════ */
.mobile-fab {
  display: none;
  position: fixed;
  right: 18px;
  bottom: 24px;
  z-index: 60;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  background: var(--accent, #F56314);
  color: #ffffff;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(245, 99, 20, 0.42), 0 2px 6px rgba(15, 23, 42, 0.18);
  transition: transform 0.2s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.2s ease, background-color 0.2s ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.mobile-fab:active {
  transform: scale(0.92);
  box-shadow: 0 2px 8px rgba(245, 99, 20, 0.36);
}

/* 保存中：旋转指示 */
.mobile-fab.fab-loading {
  pointer-events: none;
  opacity: 0.75;
}

.mobile-fab.fab-loading svg {
  animation: fab-spin 0.9s linear infinite;
}

@keyframes fab-spin {
  to { transform: rotate(360deg); }
}

/* 触屏设备（粗指针）才显示 FAB */
@media (hover: none) and (pointer: coarse) {
  .mobile-fab {
    display: flex;
  }
}

/* 小屏也显示（部分安卓平板/折叠屏的 hover 探测不准） */
@media (max-width: 640px) {
  .mobile-fab {
    display: flex;
    bottom: calc(88px + env(safe-area-inset-bottom, 0px));
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   移动端：卡片操作按钮隐藏（单击复制，快速双击查看）
   ══════════════════════════════════════════════════════════════════════════ */
@media (hover: none) and (pointer: coarse) {
  /* 卡片内所有操作按钮默认隐藏 */
  .message.paste-card .message-actions {
    display: none !important;
  }

  /* 卡片右上角 App 角标仍然保留（类型识别用） */
  .message.paste-card .paste-header-corner-app {
    display: flex;
  }
}

/* ══════════════════════════════════════════════════════════════════════════
   移动端筛选条：保证全部 6 个分类都可见（横向可滚动）
   ══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  .paste-filter-bar.floating-filter-dock {
    max-width: calc(100vw - 24px);
    padding: 5px 6px;
  }

  /* 内部横向滚动，确保 all/text/code/link/image/file 全部可达 */
  .paste-filter-inner {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
  }

  .paste-filter-inner::-webkit-scrollbar {
    display: none;
  }

  .filter-chip {
    flex-shrink: 0;
    height: 30px;
    padding: 0 11px;
    font-size: 0.78rem;
  }

  /* 移动端「新建」按钮隐藏（已由 FAB 替代） */
  .dock-divider {
    display: none;
  }

  .dock-compose-btn {
    display: none;
  }
}