* {
      font-family: 'Noto Sans SC', 'Plus Jakarta Sans', sans-serif;
    }

    /* Swiss Typography */
    .font-cn {
      font-family: 'Noto Sans SC', sans-serif;
    }

    .font-en {
      font-family: 'Plus Jakarta Sans', sans-serif;
    }

    :root,
    html[data-theme="light"] {
      --background: #f7f7f5;
      --foreground: #0b0b0c;
      --surface: #ffffff;
      --surface-elevated: #ffffff;
      --muted-surface: #f3f4f3;
      --border: #d9dad7;
      --subtle-border: #ececea;
      --primary-text: #111111;
      --secondary-text: #52525b;
      --tertiary-text: #797b80;
      --primary-button-bg: #0a0a0a;
      --primary-button-text: #ffffff;
      --secondary-button-bg: #ffffff;
      --secondary-button-text: #18181b;
      --focus-ring: #2563eb;
      --brand-warm: #f59e0b;
      --danger: #dc2626;
      --warning: #b45309;
      --success: #15803d;

      /* Z-index scale — single source of truth for stacking order */
      --z-table-body: 1;
      --z-table-cell-content: 2;
      --z-table-thumb-badge: 3;
      --z-table-clear-btn: 4;
      --z-table-header: 20;
      --z-app-header: 40;
      --z-dropdown: 50;
      --z-history-overlay: 70;
      --z-history-sidebar: 80;
      --z-modal: 100;
      --z-toast: 110;
      --z-modal-confirm: 120;
      --danger-bg: #fef2f2;
      --warning-bg: #fffbeb;
      --success-bg: #f0fdf4;
      --info-bg: #eff6ff;
      --overlay: rgba(10, 10, 10, 0.48);
      --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 12px 30px rgba(15, 23, 42, 0.10);
      --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.18);
      --surfaceElevated: var(--surface-elevated);
      --mutedSurface: var(--muted-surface);
      --subtleBorder: var(--subtle-border);
      --primaryText: var(--primary-text);
      --secondaryText: var(--secondary-text);
      --tertiaryText: var(--tertiary-text);
      --primaryButtonBg: var(--primary-button-bg);
      --primaryButtonText: var(--primary-button-text);
      --secondaryButtonBg: var(--secondary-button-bg);
      --secondaryButtonText: var(--secondary-button-text);
      --focusRing: var(--focus-ring);
      --brandWarm: var(--brand-warm);

      --upload-idle-bg: rgba(255, 255, 255, 0.94);
      --upload-idle-border: rgba(17, 17, 19, 0.30);
      --upload-idle-title: rgba(17, 17, 19, 0.96);
      --upload-idle-text: rgba(55, 58, 66, 0.76);
      --upload-idle-muted: rgba(78, 82, 92, 0.58);
      --upload-icon-bg: rgba(17, 17, 19, 0.035);
      --upload-icon-border: rgba(17, 17, 19, 0.16);
      --upload-icon-color: rgba(17, 17, 19, 0.72);
      --upload-processing-bg:
        radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.72), transparent 30%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(250, 250, 248, 0.90));
      --upload-processing-title: rgba(20, 20, 22, 0.92);
      --upload-processing-text: rgba(69, 72, 82, 0.74);
      --upload-processing-muted: rgba(97, 101, 112, 0.62);
      --upload-state-pending: rgba(112, 116, 126, 0.56);
      --upload-state-success: #16a34a;
      --upload-state-success-bg: rgba(22, 163, 74, 0.10);
      --upload-state-review: #b77905;
      --upload-state-review-bg: rgba(245, 158, 11, 0.12);
      --upload-state-danger: #dc2626;
      --upload-state-danger-bg: rgba(220, 38, 38, 0.10);
      --upload-beam-core: rgba(255, 255, 255, 0.58);
      --upload-beam-warm: rgba(255, 215, 150, 0.20);
      --upload-beam-cool: rgba(176, 210, 255, 0.18);
      --upload-scan-core: rgba(255, 255, 255, 0.44);
      --upload-scan-warm: rgba(255, 214, 142, 0.16);
      --upload-scan-cool: rgba(140, 184, 255, 0.13);
      --upload-text-sheen: rgba(255, 255, 255, 0.96);
      --upload-progress-fill: #0f1012;
      --upload-overlay-bg: rgba(0, 0, 0, 0.56);
      --upload-overlay-text: rgba(255, 255, 255, 0.94);
      --upload-overlay-secondary: rgba(255, 255, 255, 0.76);
      --upload-overlay-card-bg: rgba(255, 255, 255, 0.07);
      --upload-overlay-card-border: rgba(255, 255, 255, 0.12);
      --motion-upload-fast: 180ms;
      --motion-upload-medium: 720ms;
      --motion-upload-overlay: 900ms;
      --motion-upload-text-sheen: 8s;
      --motion-upload-scan: 11.8s;
      --motion-upload-beam: 5.8s;
      --upload-radius: 30px;
    }

    html[data-theme="dark"] {
      --background: #080808;
      --foreground: #f5f5f4;
      --surface: #141414;
      --surface-elevated: #1c1c1c;
      --muted-surface: #202020;
      --border: #2c2c2c;
      --subtle-border: #232323;
      --primary-text: #f4f4f5;
      --secondary-text: #b7b7ba;
      --tertiary-text: #77777c;
      --primary-button-bg: #f5f5f5;
      --primary-button-text: #080808;
      --secondary-button-bg: #1d1d1d;
      --secondary-button-text: #eeeeee;
      --focus-ring: #93c5fd;
      --brand-warm: #fbbf24;
      --danger: #f87171;
      --warning: #facc15;
      --success: #4ade80;
      --danger-bg: rgba(248, 113, 113, 0.12);
      --warning-bg: rgba(250, 204, 21, 0.12);
      --success-bg: rgba(74, 222, 128, 0.12);
      --info-bg: rgba(147, 197, 253, 0.12);
      --overlay: rgba(0, 0, 0, 0.68);
      --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.28);
      --shadow-md: 0 12px 30px rgba(0, 0, 0, 0.34);
      --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.52);
      --surfaceElevated: var(--surface-elevated);
      --mutedSurface: var(--muted-surface);
      --subtleBorder: var(--subtle-border);
      --primaryText: var(--primary-text);
      --secondaryText: var(--secondary-text);
      --tertiaryText: var(--tertiary-text);
      --primaryButtonBg: var(--primary-button-bg);
      --primaryButtonText: var(--primary-button-text);
      --secondaryButtonBg: var(--secondary-button-bg);
      --secondaryButtonText: var(--secondary-button-text);
      --focusRing: var(--focus-ring);
      --brandWarm: var(--brand-warm);

      --upload-idle-bg: rgba(18, 18, 18, 0.94);
      --upload-idle-border: rgba(255, 255, 255, 0.38);
      --upload-idle-title: rgba(255, 255, 255, 0.96);
      --upload-idle-text: rgba(255, 255, 255, 0.66);
      --upload-idle-muted: rgba(255, 255, 255, 0.40);
      --upload-icon-bg: rgba(255, 255, 255, 0.055);
      --upload-icon-border: rgba(255, 255, 255, 0.10);
      --upload-icon-color: rgba(255, 255, 255, 0.70);
      --upload-processing-bg:
        radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.08), transparent 30%),
        linear-gradient(180deg, rgba(31, 31, 31, 0.92), rgba(18, 18, 18, 0.92));
      --upload-processing-title: rgba(255, 255, 255, 0.88);
      --upload-processing-text: rgba(255, 255, 255, 0.60);
      --upload-processing-muted: rgba(255, 255, 255, 0.42);
      --upload-state-pending: rgba(255, 255, 255, 0.42);
      --upload-state-success: #4ade80;
      --upload-state-success-bg: rgba(74, 222, 128, 0.12);
      --upload-state-review: #facc15;
      --upload-state-review-bg: rgba(250, 204, 21, 0.11);
      --upload-state-danger: #fb7185;
      --upload-state-danger-bg: rgba(251, 113, 133, 0.12);
      --upload-beam-core: rgba(255, 255, 255, 0.70);
      --upload-beam-warm: rgba(255, 201, 111, 0.38);
      --upload-beam-cool: rgba(164, 199, 255, 0.24);
      --upload-scan-core: rgba(255, 255, 255, 0.12);
      --upload-scan-warm: rgba(255, 222, 170, 0.060);
      --upload-scan-cool: rgba(175, 205, 255, 0.050);
      --upload-text-sheen: rgba(255, 255, 255, 0.96);
      --upload-progress-fill: #ffffff;
      --upload-overlay-bg: rgba(0, 0, 0, 0.56);
      --upload-overlay-text: rgba(255, 255, 255, 0.94);
      --upload-overlay-secondary: rgba(255, 255, 255, 0.76);
      --upload-overlay-card-bg: rgba(255, 255, 255, 0.07);
      --upload-overlay-card-border: rgba(255, 255, 255, 0.12);
    }

    body {
      background: var(--background);
      color: var(--foreground);
    }

    .app-shell {
      min-height: 100vh;
      background:
        radial-gradient(circle at top left, color-mix(in srgb, var(--brand-warm) 10%, transparent), transparent 30rem),
        linear-gradient(180deg, var(--background), color-mix(in srgb, var(--background) 92%, var(--surface) 8%));
      color: var(--foreground);
    }

    :focus-visible {
      outline: 2px solid var(--focus-ring);
      outline-offset: 2px;
      box-shadow: 0 0 0 4px color-mix(in srgb, var(--focus-ring) 18%, transparent);
    }

    .card-modern {
      background: var(--surface);
      border: 1px solid var(--border);
      color: var(--primary-text);
      box-shadow: var(--shadow-sm);
      transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
    }

    .card-modern:hover {
      border-color: var(--border);
      box-shadow: var(--shadow-md);
    }

    input[type="date"]::-webkit-calendar-picker-indicator {
      cursor: pointer;
    }

    html[data-theme="dark"] input[type="date"]::-webkit-calendar-picker-indicator {
      filter: invert(1);
    }

    .input-modern {
      background: var(--muted-surface);
      border: 1px solid var(--border);
      color: var(--primary-text);
      transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
    }

    .input-modern::placeholder {
      color: var(--tertiary-text);
    }

    .input-modern:focus {
      background: var(--surface);
      border-color: var(--focus-ring);
      outline: none;
      box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus-ring) 22%, transparent);
    }

    .btn-primary {
      background: var(--primary-button-bg);
      color: var(--primary-button-text);
      border: 1px solid var(--primary-button-bg);
      font-weight: 600;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: var(--shadow-md);
    }

    .btn-secondary {
      background: var(--secondary-button-bg);
      color: var(--secondary-button-text);
      border: 1px solid var(--border);
      font-weight: 600;
      transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
    }

    .btn-secondary:hover {
      background: var(--muted-surface);
      border-color: color-mix(in srgb, var(--primary-text) 22%, var(--border));
      box-shadow: var(--shadow-sm);
    }

    .btn-ghost {
      background: transparent;
      color: var(--secondary-text);
      border: 1px solid transparent;
      border-radius: 0.625rem;
      transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    }

    .btn-ghost:hover {
      background: var(--muted-surface);
      color: var(--primary-text);
      border-color: var(--subtle-border);
    }

    .icon-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 0.625rem;
      border: 1px solid var(--border);
      background: var(--secondary-button-bg);
      color: var(--secondary-button-text);
      transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    }

    .icon-button:hover {
      background: var(--muted-surface);
      border-color: color-mix(in srgb, var(--primary-text) 22%, var(--border));
      transform: translateY(-1px);
    }

    .app-header {
      background: color-mix(in srgb, var(--surface) 82%, transparent);
      border-bottom: 1px solid var(--border);
      color: var(--primary-text);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      position: sticky;
      top: 0;
      z-index: 40;
    }

    .app-header__brand {
      display: inline-flex;
      align-items: center;
      min-width: 0;
      opacity: 0.92;
      transition: opacity 0.2s ease, transform 0.2s ease;
    }

    .app-header__brand:hover {
      opacity: 1;
      transform: translateY(-1px);
    }

    .app-logo {
      width: clamp(12.5rem, 28.7vw, 19.55rem);
      max-width: min(100%, 19.55rem);
      height: auto;
      flex-shrink: 1;
    }

    .app-logo--dark {
      display: none;
    }

    html[data-theme="dark"] .app-logo--light {
      display: none;
    }

    html[data-theme="dark"] .app-logo--dark {
      display: block;
    }

    .theme-toggle {
      display: inline-flex;
      align-items: center;
      gap: 0.125rem;
      padding: 0.1875rem;
      border: 1px solid var(--border);
      border-radius: 9999px;
      background: var(--muted-surface);
      box-shadow: var(--shadow-sm);
    }

    .theme-toggle__button {
      min-height: 1.875rem;
      border: 1px solid transparent;
      border-radius: 9999px;
      background: transparent;
      color: var(--secondary-text);
      padding: 0.35rem 0.7rem;
      font-size: 0.75rem;
      font-weight: 600;
      line-height: 1;
      transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    }

    .theme-toggle__button:hover {
      color: var(--primary-text);
      background: color-mix(in srgb, var(--surface) 70%, transparent);
    }

    .theme-toggle__button.is-active {
      background: var(--surface-elevated);
      border-color: var(--subtle-border);
      color: var(--primary-text);
      box-shadow: var(--shadow-sm);
    }

    .app-header__history-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.35rem;
      min-height: calc(1.875rem + 0.375rem);
      padding: 0.1875rem 0.85rem;
      border: 1px solid var(--border);
      border-radius: 9999px;
      background: var(--muted-surface);
      color: var(--primary-text);
      box-shadow: var(--shadow-sm);
      font-size: 0.75rem;
      font-weight: 600;
      line-height: 1;
      transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    }

    .app-header__history-button:hover {
      background: color-mix(in srgb, var(--surface) 70%, transparent);
      border-color: var(--subtle-border);
      color: var(--primary-text);
    }

    .app-header__history-button svg {
      flex-shrink: 0;
    }

    .autosave-toggle {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      border-radius: 9999px;
      border: 1px solid transparent;
      background: transparent;
      color: var(--secondary-text);
      padding: 0.25rem 0.35rem;
      transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    }

    .autosave-toggle:hover {
      background: var(--muted-surface);
      color: var(--primary-text);
      border-color: var(--subtle-border);
    }

    .autosave-toggle__track {
      width: 2rem;
      height: 1.125rem;
      padding: 0.125rem;
      border-radius: 9999px;
      background: var(--border);
      transition: background-color 0.2s ease;
    }

    .autosave-toggle__track.is-on {
      background: color-mix(in srgb, var(--primary-text) 82%, var(--brand-warm) 18%);
    }

    .autosave-toggle__thumb {
      display: block;
      width: 0.875rem;
      height: 0.875rem;
      border-radius: 9999px;
      background: var(--surface);
      box-shadow: var(--shadow-sm);
      transform: translateX(0);
      transition: transform 0.2s ease, background-color 0.2s ease;
    }

    .autosave-toggle__thumb.is-on {
      transform: translateX(0.875rem);
      background: var(--background);
    }

    .autosave-toggle__label,
    .save-status__label {
      font-size: 0.6875rem;
      white-space: nowrap;
    }

    .save-status {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      border-left: 1px solid var(--border);
      color: var(--tertiary-text);
      padding-left: 0.9rem;
    }

    .save-status__dot {
      width: 0.5rem;
      height: 0.5rem;
      border-radius: 9999px;
      border: 1px solid var(--border);
      background: transparent;
      transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .save-status.is-saving {
      color: var(--secondary-text);
    }

    .save-status.is-saving .save-status__dot {
      border-color: var(--brand-warm);
      background: var(--brand-warm);
      box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand-warm) 14%, transparent);
    }

    .footer-muted {
      color: var(--tertiary-text);
    }

    .footer-link {
      color: var(--secondary-text);
      border-radius: 0.5rem;
      transition: color 0.2s ease, background-color 0.2s ease;
    }

    .footer-link:hover {
      color: var(--primary-text);
      background: var(--muted-surface);
    }

    .version-badge {
      display: inline-flex;
      align-items: center;
      border: 0;
      background: transparent;
      color: var(--secondary-text);
      padding: 0.125rem 0.25rem;
      font-size: 0.75rem;
      font-weight: 600;
      text-decoration: none;
      transition: color 0.2s ease, text-decoration-color 0.2s ease;
    }

    .version-badge:hover {
      color: var(--primary-text);
      text-decoration: underline;
      text-decoration-color: color-mix(in srgb, var(--brand-warm) 55%, transparent);
      text-underline-offset: 0.18rem;
    }

    .version-update-dot {
      background: var(--brand-warm);
    }

    .modal-overlay {
      background: var(--overlay);
    }

    .modal-panel {
      background: var(--surface-elevated);
      border: 1px solid var(--border);
      color: var(--primary-text);
      box-shadow: var(--shadow-lg);
    }

    [role="dialog"] {
      color: var(--primary-text);
    }

    .modal-shell {
      background: var(--surface-elevated);
      border: 1px solid var(--border);
      color: var(--primary-text);
      box-shadow: var(--shadow-lg);
      overscroll-behavior: contain;
    }

    .modal-title {
      color: var(--primary-text);
      text-wrap: balance;
    }

    .modal-description,
    .modal-muted {
      color: var(--secondary-text);
    }

    .modal-subtle {
      color: var(--tertiary-text);
    }

    .modal-divider {
      border-color: var(--border);
    }

    .modal-close {
      background: var(--muted-surface);
      color: var(--secondary-text);
      border: 1px solid var(--border);
      transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
    }

    .modal-close:hover {
      background: var(--surface);
      color: var(--primary-text);
      border-color: color-mix(in srgb, var(--primary-text) 20%, var(--border));
    }

    .modal-step-index {
      background: color-mix(in srgb, var(--brand-warm) 12%, var(--surface));
      border: 1px solid color-mix(in srgb, var(--brand-warm) 24%, var(--border));
      color: var(--primary-text);
    }

    .confirm-dialog__icon--danger {
      background: var(--danger-bg);
      border-color: color-mix(in srgb, var(--danger) 28%, var(--border));
      color: var(--danger);
    }

    .confirm-dialog__icon--warning {
      background: var(--warning-bg);
      border-color: color-mix(in srgb, var(--warning) 28%, var(--border));
      color: var(--warning);
    }

    .confirm-dialog__icon--success {
      background: var(--success-bg);
      border-color: color-mix(in srgb, var(--success) 28%, var(--border));
      color: var(--success);
    }

    /* Reusable illustrated splash modal (upgrade + guide variants) */
    .hero-modal {
      max-width: 36.4rem;
      max-height: min(81vh, 36rem);
    }

    .hero-modal__hero-wrap {
      position: relative;
      line-height: 0;
      background: var(--surface-elevated);
    }

    .hero-modal__hero {
      display: block;
      width: 100%;
      height: auto;
    }

    /* Upgrade hero is cropped to a consistent banner ratio. */
    .hero-modal--upgrade .hero-modal__hero {
      aspect-ratio: 800 / 288;
      object-fit: cover;
      object-position: center;
    }

    /* Guide welcome hero keeps its illustration framing. */
    .hero-modal--guide .hero-modal__hero {
      aspect-ratio: 800 / 360;
      object-fit: cover;
      object-position: center;
    }

    .hero-modal__close {
      background: color-mix(in srgb, var(--surface-elevated) 55%, transparent);
      -webkit-backdrop-filter: blur(6px);
      backdrop-filter: blur(6px);
    }

    .hero-modal__section-heading {
      color: var(--primary-text);
    }

    .hero-modal__body {
      /* Flex column so the scroll area can shrink; anchor for the bottom fade. */
      position: relative;
      flex: 1 1 auto;
      min-height: 0;
      display: flex;
      flex-direction: column;
    }

    /* Guide body is static (no scroll) — sizes to its content. */
    .hero-modal--guide .hero-modal__body {
      display: block;
      flex: 0 0 auto;
    }

    .hero-modal__scroll {
      flex: 1 1 auto;
      min-height: 0;
      overflow-y: auto;
    }

    .hero-modal__content {
      overflow: visible;
    }

    .hero-modal__footer {
      background: var(--surface-elevated);
    }

    .hero-modal__fade {
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 3.5rem;
      pointer-events: none;
      opacity: 0;
      transition: opacity 0.2s ease;
      background: linear-gradient(
        to bottom,
        color-mix(in srgb, var(--surface-elevated) 0%, transparent),
        var(--surface-elevated)
      );
    }

    .hero-modal__fade.is-visible {
      opacity: 1;
    }

    /* Guide quick-start steps: 2x2 on desktop, single column on narrow screens. */
    .hero-modal__steps {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 1rem 1.25rem;
    }

    .hero-modal__step {
      display: flex;
      gap: 0.75rem;
      align-items: flex-start;
    }

    .hero-modal__step-index {
      width: 1.75rem;
      height: 1.75rem;
      border-radius: 9999px;
      border: 1.5px solid color-mix(in srgb, var(--primary-text) 32%, transparent);
      color: var(--primary-text);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-size: 0.8rem;
    }

    .hero-modal__step-text {
      min-width: 0;
    }

    @media (max-width: 480px) {
      .hero-modal__steps {
        grid-template-columns: 1fr;
        gap: 0.75rem;
      }
    }

    .toast {
      border: 1px solid var(--border);
      background: var(--surface-elevated);
      color: var(--primary-text);
      box-shadow: var(--shadow-lg);
    }

    .toast--success {
      border-color: color-mix(in srgb, var(--success) 32%, var(--border));
    }

    .toast--warning {
      border-color: color-mix(in srgb, var(--warning) 32%, var(--border));
    }

    .toast--error {
      border-color: color-mix(in srgb, var(--danger) 32%, var(--border));
    }

    .toast__icon {
      background: var(--muted-surface);
      color: var(--primary-text);
    }

    .toast--success .toast__icon {
      color: var(--success);
    }

    .toast--warning .toast__icon {
      color: var(--warning);
    }

    .toast--error .toast__icon {
      color: var(--danger);
    }

    .export-preview-shell {
      position: relative;
      background: var(--surface-elevated);
      border: 1px solid var(--border);
      color: var(--primary-text);
      box-shadow: var(--shadow-lg);
    }

    .export-preview-close {
      position: absolute;
      top: 1rem;
      right: 1rem;
      z-index: 12;
    }

    .export-preview-header {
      min-height: 4.5rem;
    }

    .export-preview-sidebar,
    .export-preview-main,
    .export-preview-footer,
    .export-preview-header {
      background: var(--surface-elevated);
      border-color: var(--border);
      color: var(--primary-text);
    }

    .export-preview-workspace {
      background: var(--background);
    }

    .export-preview-body {
      min-height: 0;
      background: var(--background);
    }

    .export-preview-sidebar {
      width: min(18rem, 32vw);
      max-width: 20rem;
      transition: width 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
    }

    .export-preview-sidebar.is-collapsed {
      width: 0;
      border-right-width: 0;
      opacity: 0;
      overflow: hidden;
      pointer-events: none;
    }

    .export-preview-sidebar-rail {
      width: 3.25rem;
      background: var(--surface-elevated);
      border-right: 1px solid var(--border);
      color: var(--secondary-text);
    }

    .export-compact-summary {
      background: var(--surface-elevated);
      border-bottom: 1px solid var(--border);
      color: var(--primary-text);
    }

    .export-readiness-card,
    .export-stat-card,
    .export-issue-card {
      background: var(--surface);
      border: 1px solid var(--border);
      color: var(--primary-text);
    }

    .export-side-panel {
      background: var(--surface-elevated);
      border-color: var(--border);
      color: var(--primary-text);
      box-shadow: var(--shadow-lg);
    }

    .export-side-backdrop {
      background: color-mix(in srgb, var(--overlay) 70%, transparent);
    }

    .export-preview-canvas {
      min-width: 0;
      background:
        linear-gradient(45deg, color-mix(in srgb, var(--muted-surface) 58%, transparent) 25%, transparent 25%),
        linear-gradient(-45deg, color-mix(in srgb, var(--muted-surface) 58%, transparent) 25%, transparent 25%),
        var(--background);
      background-size: 24px 24px;
      background-position: 0 0, 0 12px;
    }

    .preview-zoom-toolbar {
      background: color-mix(in srgb, var(--surface-elevated) 88%, transparent);
      border: 1px solid var(--border);
      color: var(--secondary-text);
      box-shadow: var(--shadow-sm);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
    }

    .preview-zoom-button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.35rem;
      white-space: nowrap;
      line-height: 1;
    }

    .preview-zoom-value {
      color: var(--primary-text);
      font-variant-numeric: tabular-nums;
    }

    .preview-zoom-stage {
      transform-origin: top center;
      transition: transform 0.18s ease;
      will-change: transform;
    }

    .export-tab-list,
    .column-option {
      background: var(--muted-surface);
      border: 1px solid var(--border);
      color: var(--secondary-text);
    }

    .export-tab {
      color: var(--secondary-text);
      transition: background-color 0.18s ease, color 0.18s ease;
    }

    .export-tab:hover,
    .export-tab.is-active {
      background: var(--surface-elevated);
      color: var(--primary-text);
    }

    .column-option {
      background: transparent;
      transition: background-color 0.18s ease, border-color 0.18s ease, opacity 0.18s ease;
    }

    .column-option:hover,
    .column-option.is-visible {
      background: var(--muted-surface);
      border-color: var(--border);
      color: var(--primary-text);
    }

    .fixed-column-badge {
      background: color-mix(in srgb, var(--brand-warm) 10%, var(--surface));
      border: 1px solid color-mix(in srgb, var(--brand-warm) 24%, var(--border));
      color: var(--secondary-text);
    }

    .export-preview-paper {
      background: #ffffff;
      color: #111111;
      box-shadow: var(--shadow-md);
    }

    .export-preview-paper table {
      font-variant-numeric: tabular-nums;
    }

    .excel-preview-title {
      color: #1f2937;
    }

    .excel-preview-meta {
      color: #4b5563;
    }

    .excel-preview-header {
      border-bottom: 2px solid #1f2937;
    }

    .excel-preview-table {
      border: 1px solid #d1d5db;
    }

    .excel-preview-table th,
    .excel-preview-table td {
      border: 1px solid #d1d5db;
    }

    .excel-preview-table th {
      background: #f9fafb;
      color: #374151;
    }

    .excel-preview-table td {
      color: #4b5563;
    }

    .excel-preview-row-alt {
      background: #f9fafb;
    }

    .excel-preview-empty {
      color: #d1d5db;
    }

    .history-overlay {
      background: var(--overlay);
    }

    .history-sidebar {
      background: var(--surface-elevated);
      border-left: 1px solid var(--border);
      color: var(--primary-text);
      box-shadow: var(--shadow-lg);
    }

    .history-sidebar__header,
    .history-sidebar__footer {
      background: var(--surface-elevated);
      border-color: var(--border);
    }

    .history-card {
      background: var(--surface);
      border: 1px solid var(--border);
      color: var(--primary-text);
      transition: border-color 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
    }

    .history-card:hover {
      border-color: color-mix(in srgb, var(--brand-warm) 35%, var(--border));
      box-shadow: var(--shadow-md);
    }

    .history-card__summary {
      background: var(--muted-surface);
      border: 1px solid var(--border);
    }

    .history-total {
      color: var(--primary-text);
      font-variant-numeric: tabular-nums;
    }

    .history-count-badge {
      background: var(--surface-elevated);
      border: 1px solid var(--border);
      color: var(--secondary-text);
    }

    .history-action {
      background: var(--secondary-button-bg);
      border: 1px solid var(--border);
      color: var(--secondary-button-text);
      transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
    }

    .history-action:hover {
      background: var(--muted-surface);
      border-color: color-mix(in srgb, var(--primary-text) 20%, var(--border));
      color: var(--primary-text);
    }

    .history-action--danger {
      color: var(--danger);
      border-color: color-mix(in srgb, var(--danger) 28%, var(--border));
    }

    .history-action--danger:hover {
      background: var(--danger-bg);
      border-color: var(--danger);
      color: var(--danger);
    }

    .history-clear-button {
      background: var(--secondary-button-bg);
      border: 1px solid var(--border);
      color: var(--secondary-button-text);
      font-weight: 600;
      transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
    }

    .history-clear-button:hover {
      background: var(--danger-bg);
      border-color: color-mix(in srgb, var(--danger) 28%, var(--border));
      color: var(--danger);
    }

    .image-preview-overlay {
      background: var(--overlay);
    }

    .image-preview-shell {
      background: var(--surface-elevated);
      border: 1px solid var(--border);
      color: var(--primary-text);
      box-shadow: var(--shadow-lg);
    }

    .image-preview-header,
    .image-preview-thumbs {
      background: var(--surface-elevated);
      border-color: var(--border);
    }

    .image-preview-viewport {
      background:
        linear-gradient(45deg, color-mix(in srgb, var(--muted-surface) 58%, transparent) 25%, transparent 25%),
        linear-gradient(-45deg, color-mix(in srgb, var(--muted-surface) 58%, transparent) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, color-mix(in srgb, var(--muted-surface) 58%, transparent) 75%),
        linear-gradient(-45deg, transparent 75%, color-mix(in srgb, var(--muted-surface) 58%, transparent) 75%),
        var(--background);
      background-size: 20px 20px;
      background-position: 0 0, 0 10px, 10px -10px, -10px 0;
    }

    .image-preview-toolbar,
    .image-preview-nav {
      background: color-mix(in srgb, var(--surface-elevated) 84%, transparent);
      border: 1px solid var(--border);
      color: var(--primary-text);
      box-shadow: var(--shadow-lg);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
    }

    .image-preview-nav:hover,
    .image-preview-toolbar button:hover {
      background: var(--muted-surface);
    }

    @media (max-width: 900px) {
      .export-preview-sidebar {
        position: absolute;
        inset-block: 0;
        left: 3.25rem;
        z-index: 20;
        width: min(18rem, calc(100vw - 5rem));
        max-width: calc(100vw - 5rem);
        box-shadow: var(--shadow-lg);
      }

      .export-preview-sidebar.is-collapsed {
        transform: translateX(-1rem);
      }
    }

    @property --upload-beam-angle {
      syntax: "<angle>";
      initial-value: 0deg;
      inherits: false;
    }

    @keyframes upload-beam-orbit {
      to { --upload-beam-angle: 360deg; }
    }

    @keyframes upload-frosted-scan {
      0% { transform: translateX(-50%) rotate(-7deg) scaleX(1.22) scaleY(1.08); }
      46% { transform: translateX(18%) rotate(-7deg) scaleX(1.34) scaleY(1.13); }
      100% { transform: translateX(42%) rotate(-7deg) scaleX(1.26) scaleY(1.09); }
    }

    @keyframes upload-text-sheen {
      0% { background-position: 145% 0; opacity: 0; }
      10% { opacity: 0; }
      18% { opacity: 0.86; }
      46% { background-position: -45% 0; opacity: 0.92; }
      56% { opacity: 0; }
      100% { background-position: -45% 0; opacity: 0; }
    }

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

    .upload-workspace {
      --upload-beam-angle: 0deg;
      min-height: 14rem;
      height: 100%;
      position: relative;
      border: 1px solid var(--upload-idle-border);
      border-radius: var(--upload-radius);
      background: var(--upload-idle-bg);
      overflow: hidden;
      isolation: isolate;
      transition:
        border-color 0.2s ease,
        background 0.2s ease,
        box-shadow 0.2s ease,
        transform 0.2s ease;
      box-shadow: var(--shadow-sm);
    }

    .upload-workspace[data-workspace-state="idle"]:hover {
      border: 1px dashed var(--upload-idle-border);
      box-shadow: var(--shadow-md);
      transform: translateY(-1px);
    }

    .upload-workspace.drag-active {
      border: 1px dashed var(--brand-warm);
      box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand-warm) 16%, transparent);
      transform: translateY(-1px);
    }

    .upload-workspace[data-workspace-state="processing"],
    .upload-workspace[data-workspace-state="enhancing"] {
      border-style: solid;
      border-color: transparent;
      background: var(--upload-processing-bg);
      box-shadow: var(--shadow-md);
    }

    .upload-workspace::before,
    .upload-workspace::after {
      content: "";
      position: absolute;
      pointer-events: none;
      opacity: 0;
      transition: opacity var(--motion-upload-overlay) ease, filter var(--motion-upload-overlay) ease;
    }

    .upload-workspace::before {
      inset: -38%;
      z-index: -1;
      background:
        conic-gradient(
          from var(--upload-beam-angle),
          transparent 0deg,
          transparent 52deg,
          var(--upload-beam-cool) 62deg,
          var(--upload-beam-core) 72deg,
          var(--upload-beam-warm) 82deg,
          transparent 98deg,
          transparent 178deg,
          rgba(255, 255, 255, 0.16) 188deg,
          transparent 204deg,
          transparent 360deg
        );
      filter: blur(10px);
      animation: upload-beam-orbit var(--motion-upload-beam) linear infinite;
    }

    .upload-workspace::after {
      inset: 0;
      z-index: 0;
      background:
        radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.06), transparent 34%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.018), transparent 46%, rgba(255, 220, 166, 0.018));
      opacity: 0;
    }

    .upload-workspace[data-workspace-state="processing"]::after,
    .upload-workspace[data-workspace-state="enhancing"]::after {
      opacity: 0.24;
    }

    .upload-workspace[data-workspace-state="processing"]::before,
    .upload-workspace[data-workspace-state="enhancing"]::before {
      opacity: 0.72;
    }

    .upload-workspace[data-workspace-state="complete"]::before,
    .upload-workspace[data-workspace-state="resetting"]::before {
      opacity: 0;
      filter: blur(18px);
    }

    .upload-idle,
    .upload-processing,
    .upload-complete-overlay {
      position: absolute;
      inset: 0;
      z-index: 1;
      transition:
        opacity var(--motion-upload-medium) ease,
        transform var(--motion-upload-medium) cubic-bezier(.2, .8, .2, 1),
        filter var(--motion-upload-medium) ease;
    }

    .upload-idle {
      display: flex;
      opacity: 1;
      transform: scale(1);
    }

    .upload-idle-center {
      flex: 1;
      display: flex;
      width: 100%;
    }

    .upload-trigger {
      appearance: none;
      border: 0;
      background: transparent;
      width: 100%;
      height: 100%;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
      color: inherit;
      cursor: pointer;
      padding: 2rem;
      border-radius: 1rem;
      transition: background-color var(--motion-upload-fast) ease;
    }

    .upload-trigger:hover {
      background: color-mix(in srgb, var(--surface-elevated) 55%, transparent);
    }

    .upload-trigger:focus-visible {
      outline: none;
      box-shadow: 0 0 0 4px color-mix(in srgb, var(--focus-ring) 36%, transparent);
      border-radius: 1rem;
    }

    .upload-icon {
      width: 3.5rem;
      height: 3.5rem;
      border-radius: 999px;
      display: grid;
      place-items: center;
      color: var(--upload-icon-color);
      background: var(--upload-icon-bg);
      border: 1px solid var(--upload-icon-border);
      box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.18),
        0 8px 24px rgba(0, 0, 0, 0.10);
      margin-bottom: 1rem;
      transition: transform 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    }

    .upload-icon__glyph {
      width: 1.75rem;
      height: 1.75rem;
      stroke-width: 1.8;
    }

    .upload-workspace.drag-active .upload-icon,
    .upload-trigger:hover .upload-icon {
      transform: translateY(-2px) scale(1.05);
    }

    .upload-title {
      margin: 0;
      color: var(--upload-idle-title);
      font-size: 0.875rem;
      line-height: 1.4;
      font-weight: 600;
      letter-spacing: -0.01em;
      text-wrap: balance;
    }

    .upload-format {
      margin: 0.5rem 0 0;
      color: var(--upload-idle-text);
      font-size: 0.75rem;
      line-height: 1.4;
      font-weight: 400;
      letter-spacing: 0;
    }

    .upload-hint {
      margin: 0.375rem 0 0;
      color: var(--upload-idle-muted);
      font-size: 0.75rem;
      line-height: 1.45;
      font-weight: 400;
      letter-spacing: 0;
    }

    .upload-workspace[data-workspace-state="processing"] .upload-idle,
    .upload-workspace[data-workspace-state="enhancing"] .upload-idle,
    .upload-workspace[data-workspace-state="complete"] .upload-idle {
      opacity: 0;
      transform: scale(0.985);
      filter: blur(8px);
      pointer-events: none;
    }

    .upload-workspace[data-workspace-state="idle"]:hover .upload-icon {
      transform: translateY(-2px) scale(1.05);
    }

    .upload-processing {
      padding: 1.875rem 2rem;
      opacity: 0;
      transform: translateY(16px) scale(0.985);
      filter: blur(6px);
      pointer-events: none;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .upload-processing::before,
    .upload-processing::after {
      content: "";
      position: absolute;
      pointer-events: none;
      opacity: 0;
      transition: opacity var(--motion-upload-medium) ease;
    }

    .upload-processing::before {
      inset: -44% -30%;
      z-index: 0;
      background:
        radial-gradient(ellipse at 50% 50%, var(--upload-scan-core), transparent 36%),
        linear-gradient(
          108deg,
          transparent 0%,
          transparent 35%,
          rgba(255, 255, 255, 0.00) 42%,
          var(--upload-scan-core) 50%,
          var(--upload-scan-warm) 58%,
          var(--upload-scan-cool) 66%,
          transparent 80%,
          transparent 100%
        );
      filter: blur(38px) saturate(1.04);
      transform: translateX(-42%) rotate(-7deg) scaleX(1.22);
      animation: upload-frosted-scan var(--motion-upload-scan) ease-in-out infinite;
      mix-blend-mode: screen;
    }

    .upload-processing::after {
      inset: 0;
      z-index: 0;
      background:
        radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.10), transparent 34%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.028), transparent 46%, rgba(255, 220, 166, 0.028));
      opacity: 0;
    }

    html[data-theme="light"] .upload-processing::before {
      mix-blend-mode: normal;
      background:
        radial-gradient(ellipse at 50% 50%, rgba(255, 255, 255, 0.72), transparent 38%),
        linear-gradient(
          108deg,
          transparent 0%,
          transparent 30%,
          rgba(255, 183, 72, 0.00) 38%,
          rgba(255, 183, 72, 0.22) 46%,
          rgba(255, 255, 255, 0.58) 52%,
          rgba(74, 145, 255, 0.26) 61%,
          rgba(255, 183, 72, 0.12) 69%,
          transparent 84%,
          transparent 100%
        );
      filter: blur(42px) saturate(1.12);
    }

    .upload-workspace[data-workspace-state="processing"] .upload-processing::before,
    .upload-workspace[data-workspace-state="enhancing"] .upload-processing::before {
      opacity: 0.24;
    }

    .upload-workspace[data-workspace-state="processing"] .upload-processing::after,
    .upload-workspace[data-workspace-state="enhancing"] .upload-processing::after {
      opacity: 0.34;
    }

    html[data-theme="light"] .upload-workspace[data-workspace-state="processing"] .upload-processing::before,
    html[data-theme="light"] .upload-workspace[data-workspace-state="enhancing"] .upload-processing::before {
      opacity: 0.82;
    }

    html[data-theme="light"] .upload-workspace[data-workspace-state="processing"] .upload-processing::after,
    html[data-theme="light"] .upload-workspace[data-workspace-state="enhancing"] .upload-processing::after {
      opacity: 0.62;
    }

    .upload-workspace[data-workspace-state="processing"] .upload-processing,
    .upload-workspace[data-workspace-state="enhancing"] .upload-processing {
      opacity: 1;
      transform: translateY(0) scale(1);
      filter: blur(0);
      pointer-events: auto;
    }

    .upload-workspace[data-workspace-state="complete"] .upload-processing {
      opacity: 0.26;
      transform: translateY(0) scale(1);
      filter: blur(4px);
    }

    .upload-processing-header {
      position: relative;
      z-index: 1;
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 1rem;
      margin-bottom: 1.375rem;
    }

    .upload-working-title {
      position: relative;
      margin: 0;
      font-size: 1rem;
      font-weight: 780;
      letter-spacing: -0.02em;
      width: max-content;
      color: var(--upload-processing-muted);
      text-shadow: 0 0 18px rgba(255, 255, 255, 0.06);
    }

    .upload-working-title::before,
    .upload-working-title::after {
      content: attr(data-text);
      position: absolute;
      inset: 0;
      pointer-events: none;
      color: transparent;
      background:
        linear-gradient(
          100deg,
          transparent 0%,
          transparent 42%,
          rgba(255, 255, 255, 0.08) 46%,
          var(--upload-text-sheen) 50%,
          rgba(255, 232, 184, 0.42) 53%,
          transparent 59%,
          transparent 100%
        );
      background-size: 240% 100%;
      background-position: 140% 0;
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      opacity: 0;
      animation: upload-text-sheen var(--motion-upload-text-sheen) cubic-bezier(.42, 0, .58, 1) infinite;
    }

    .upload-working-title::before {
      animation-delay: calc(var(--motion-upload-text-sheen) / -2);
      filter: blur(0.15px);
    }

    .upload-workspace[data-workspace-state="complete"] .upload-working-title::before,
    .upload-workspace[data-workspace-state="complete"] .upload-working-title::after,
    .upload-workspace[data-workspace-state="resetting"] .upload-working-title::before,
    .upload-workspace[data-workspace-state="resetting"] .upload-working-title::after {
      opacity: 0;
      animation-play-state: paused;
    }

    .upload-cancel-all {
      border: 1px solid color-mix(in srgb, var(--danger) 34%, var(--border));
      background: var(--danger-bg);
      color: var(--danger);
      border-radius: 999px;
      padding: 0.35rem 0.65rem;
      font-size: 0.75rem;
      cursor: pointer;
      transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    }

    .upload-cancel-all:hover {
      border-color: var(--danger);
      transform: translateY(-1px);
    }

    .upload-file-list {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: 0.625rem;
      position: relative;
      z-index: 1;
      flex: 1 1 auto;
      overflow-y: auto;
      min-height: 0;
    }

    .upload-file-main {
      display: block;
      min-width: 0;
    }

    .upload-file-row {
      display: grid;
      grid-template-columns: 24px minmax(0, 1fr) auto;
      gap: 0.75rem;
      align-items: start;
      padding: 9px 8px;
      border-radius: 15px;
      transition: background var(--motion-upload-fast) ease, transform var(--motion-upload-fast) ease;
    }

    .upload-file-row:hover {
      background: rgba(127, 127, 127, 0.06);
    }

    .upload-status-icon {
      position: relative;
      width: 18px;
      height: 18px;
      margin-top: 1px;
      border-radius: 999px;
      color: var(--upload-state-pending);
      display: grid;
      place-items: center;
    }

    .upload-status-icon::before {
      content: "";
      position: absolute;
      inset: 0;
      border-radius: inherit;
      border: 1.5px dashed currentColor;
      opacity: 0.78;
    }

    .upload-file-row[data-status="processing"] .upload-status-icon::before,
    .upload-file-row[data-status="auto_reviewing"] .upload-status-icon::before,
    .upload-file-row[data-status="enhancing"] .upload-status-icon::before {
      animation: upload-status-spin 1.4s linear infinite;
    }

    .upload-file-row[data-status="done"] .upload-status-icon {
      color: var(--upload-state-success);
      background: var(--upload-state-success-bg);
    }

    .upload-file-row[data-status="review"] .upload-status-icon,
    .upload-file-row[data-status="auto_reviewing"] .upload-status-icon,
    .upload-file-row[data-status="enhancing"] .upload-status-icon {
      color: var(--upload-state-review);
      background: var(--upload-state-review-bg);
    }

    .upload-file-row[data-status="failed"] .upload-status-icon {
      color: var(--upload-state-danger);
      background: var(--upload-state-danger-bg);
    }

    .upload-file-row[data-status="cancelled"] .upload-status-icon {
      color: var(--upload-state-pending);
      background: rgba(127, 127, 127, 0.08);
    }

    .upload-file-row[data-status="cancelled"] .upload-file-note {
      color: var(--upload-processing-muted);
    }

    .upload-file-row[data-status="done"] .upload-status-icon::before,
    .upload-file-row[data-status="review"] .upload-status-icon::before,
    .upload-file-row[data-status="failed"] .upload-status-icon::before {
      border-style: solid;
      border-color: currentColor;
      opacity: 1;
    }

    .upload-status-icon svg {
      position: relative;
      z-index: 1;
      width: 12px;
      height: 12px;
      stroke-width: 2.55;
    }

    .upload-file-name {
      display: block;
      min-width: 0;
      color: var(--upload-processing-title);
      font-size: 0.875rem;
      font-weight: 660;
      line-height: 1.34;
      letter-spacing: -0.012em;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .upload-file-note {
      display: block;
      margin-top: 4px;
      color: var(--upload-processing-muted);
      font-size: 0.75rem;
      line-height: 1.45;
    }

    .upload-file-row[data-status="done"] .upload-file-note {
      color: var(--upload-state-success);
    }

    .upload-file-row[data-status="review"] .upload-file-note,
    .upload-file-row[data-status="auto_reviewing"] .upload-file-note,
    .upload-file-row[data-status="enhancing"] .upload-file-note {
      color: var(--upload-state-review);
    }

    .upload-file-row[data-status="failed"] .upload-file-note {
      color: var(--upload-state-danger);
    }

    .upload-progress-track,
    .upload-batch-progress-track {
      position: relative;
      z-index: 1;
      height: 4px;
      margin-top: 0.45rem;
      overflow: hidden;
      border-radius: 999px;
      background: rgba(127, 127, 127, 0.18);
      border: 1px solid rgba(127, 127, 127, 0.10);
    }

    html[data-theme="light"] .upload-progress-track,
    html[data-theme="light"] .upload-batch-progress-track {
      background: rgba(17, 17, 19, 0.13);
      border-color: rgba(17, 17, 19, 0.10);
    }

    .upload-batch-progress-track {
      margin-top: 1.125rem;
    }

    .upload-progress-fill,
    .upload-batch-progress-fill {
      width: var(--upload-progress, 0%);
      height: 100%;
      border-radius: inherit;
      background: var(--upload-progress-fill);
      transition: width 420ms cubic-bezier(.2, .8, .2, 1);
      box-shadow: 0 0 18px rgba(255, 255, 255, 0.24);
    }

    html[data-theme="light"] .upload-progress-fill,
    html[data-theme="light"] .upload-batch-progress-fill {
      box-shadow:
        0 0 0 1px rgba(17, 17, 19, 0.08),
        0 0 14px rgba(17, 17, 19, 0.12);
    }

    .upload-batch-line {
      position: relative;
      z-index: 1;
      margin-top: 0.75rem;
      color: var(--upload-processing-muted);
      font-size: 0.75rem;
      font-variant-numeric: tabular-nums;
      text-align: right;
    }

    .upload-item-cancel {
      color: var(--tertiary-text);
      border: 0;
      background: transparent;
      border-radius: 0.35rem;
      padding: 0.2rem;
      cursor: pointer;
      transition: background-color 0.2s ease, color 0.2s ease;
    }

    .upload-item-cancel:hover {
      background: var(--muted-surface);
      color: var(--primary-text);
    }

    .upload-complete-overlay {
      display: grid;
      place-items: center;
      background: rgba(0, 0, 0, 0);
      opacity: 0;
      pointer-events: none;
      z-index: 3;
    }

    .upload-complete-panel {
      width: min(430px, calc(100% - 48px));
      display: grid;
      justify-items: center;
      text-align: center;
      gap: 0.85rem;
      transform: translateY(10px) scale(0.96);
      filter: blur(8px);
      opacity: 0;
      transition:
        transform 760ms cubic-bezier(.2, .8, .2, 1),
        filter 760ms ease,
        opacity 760ms ease;
    }

    .upload-complete-title {
      color: var(--upload-overlay-text);
      font-size: clamp(1.5rem, 4vw, 2.25rem);
      font-weight: 800;
      letter-spacing: -0.04em;
      line-height: 1;
    }

    .upload-complete-summary {
      color: var(--upload-overlay-secondary);
      font-size: 0.95rem;
      font-weight: 680;
      letter-spacing: -0.02em;
      line-height: 1.5;
      margin: 0;
    }

    .upload-issue-list {
      width: 100%;
      display: grid;
      gap: 0.65rem;
      margin: 0.1rem 0 0;
      text-align: left;
    }

    .upload-issue-group {
      border: 1px solid var(--upload-overlay-card-border);
      background: var(--upload-overlay-card-bg);
      border-radius: 1rem;
      padding: 0.65rem 0.75rem;
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }

    .upload-issue-title {
      margin: 0 0 7px;
      font-size: 0.75rem;
      font-weight: 760;
      color: rgba(255, 255, 255, 0.72);
    }

    .upload-issue-file {
      display: block;
      color: rgba(255, 255, 255, 0.92);
      font-size: 0.75rem;
      line-height: 1.55;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .upload-issue-more {
      margin: 0.3rem 0 0;
      color: rgba(255, 255, 255, 0.58);
      font-size: 0.75rem;
    }

    .upload-complete-actions {
      display: flex;
      gap: 0.65rem;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      margin-top: 0.1rem;
    }

    .upload-complete-action {
      appearance: none;
      border: 1px solid rgba(255, 255, 255, 0.18);
      border-radius: 999px;
      padding: 10px 16px;
      color: rgba(255, 255, 255, 0.92);
      background: rgba(255, 255, 255, 0.10);
      font-size: 0.8125rem;
      font-weight: 780;
      cursor: pointer;
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      transition:
        background var(--motion-upload-fast) ease,
        transform var(--motion-upload-fast) ease,
        border-color var(--motion-upload-fast) ease;
    }

    .upload-complete-action:hover {
      background: rgba(255, 255, 255, 0.16);
      border-color: rgba(255, 255, 255, 0.28);
      transform: translateY(-1px);
    }

    .upload-complete-action.primary {
      background: rgba(255, 255, 255, 0.92);
      color: rgba(0, 0, 0, 0.92);
      border-color: rgba(255, 255, 255, 0.92);
    }

    .upload-complete-action.primary:hover {
      background: #ffffff;
      border-color: #ffffff;
    }

    .upload-workspace[data-workspace-state="complete"] .upload-complete-overlay {
      background: var(--upload-overlay-bg);
      opacity: 1;
      pointer-events: auto;
      transition:
        background var(--motion-upload-overlay) ease,
        opacity var(--motion-upload-overlay) ease;
    }

    .upload-workspace[data-workspace-state="complete"] .upload-complete-panel {
      transform: translateY(0) scale(1);
      filter: blur(0);
      opacity: 1;
    }

    .upload-workspace[data-workspace-state="resetting"] .upload-complete-overlay {
      background: rgba(0, 0, 0, 0);
      opacity: 0;
      pointer-events: none;
      transition:
        background var(--motion-upload-medium) ease,
        opacity var(--motion-upload-medium) ease;
    }

    .upload-workspace[data-workspace-state="resetting"] .upload-complete-panel {
      opacity: 0;
      transform: translateY(-4px) scale(0.98);
      filter: blur(7px);
    }

    .upload-issue-list[hidden],
    .upload-complete-actions[hidden] {
      display: none !important;
    }

    @media (prefers-reduced-motion: reduce) {
      .upload-workspace::before,
      .upload-processing::before,
      .upload-working-title::before,
      .upload-working-title::after,
      .upload-file-row[data-status="processing"] .upload-status-icon::before,
      .upload-file-row[data-status="auto_reviewing"] .upload-status-icon::before,
      .upload-file-row[data-status="enhancing"] .upload-status-icon::before {
        animation: none !important;
      }

      .upload-workspace *,
      .upload-workspace *::before,
      .upload-workspace *::after {
        transition-duration: 0.01ms !important;
      }
    }

    .progress-bar {
      background: var(--muted-surface);
      overflow: hidden;
      border-radius: 9999px;
    }

    .progress-fill {
      height: 100%;
      transition: width 0.3s ease;
      background: linear-gradient(90deg, var(--brand-warm), var(--warning));
    }

    /* Table Styles */
    .invoice-table-shell {
      background: var(--surface);
      border: 1px solid var(--border);
      color: var(--primary-text);
      box-shadow: var(--shadow-sm);
    }

    .invoice-table-wrapper {
      background: var(--surface);
    }

    .table-modern {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      background: var(--surface);
      color: var(--primary-text);
    }

    .table-modern th {
      background: var(--surface-elevated);
      color: var(--secondary-text);
      font-weight: 600;
      font-size: 0.75rem;
      padding: 0.95rem 1rem;
      border-bottom: 1px solid var(--border);
      text-align: left;
    }

    .table-modern td {
      padding: 1rem;
      border-bottom: 1px solid var(--subtle-border);
      color: var(--primary-text);
      vertical-align: middle;
      /* Isolate each cell's stacking context so attachment thumbnails,
         badges, and buttons can never escape above the sticky header. */
      isolation: isolate;
    }

    .invoice-table-row {
      background: var(--surface);
      transition: background-color 0.18s ease;
    }

    .invoice-table-row:hover {
      background: var(--muted-surface);
    }

    .invoice-table-header {
      position: sticky;
      top: 0;
      z-index: var(--z-table-header);
      background: var(--surface-elevated);
      color: var(--secondary-text);
    }

    .invoice-sort-button {
      color: var(--secondary-text);
      transition: color 0.18s ease;
    }

    .invoice-sort-button:hover,
    .invoice-sort-button.is-active {
      color: var(--primary-text);
    }

    .invoice-sort-icon {
      color: var(--tertiary-text);
      transition: color 0.18s ease, opacity 0.18s ease;
    }

    .invoice-sort-icon.is-active {
      color: var(--brand-warm);
    }

    .invoice-image-slot {
      background: var(--muted-surface);
      border: 1px dashed var(--border);
      color: var(--tertiary-text);
      transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
    }

    .invoice-image-slot:hover {
      background: var(--surface-elevated);
      border-color: color-mix(in srgb, var(--primary-text) 22%, var(--border));
      color: var(--secondary-text);
    }

    .invoice-thumbnail {
      border: 1px solid var(--border);
      background: var(--muted-surface);
    }

    /* Attachment thumbnail wrapper — creates a local stacking context
       so internal z-index values cannot leak past the sticky table header. */
    .attachment-thumb-wrapper {
      position: relative;
      isolation: isolate;
    }

    .invoice-thumbnail-stack {
      background: var(--muted-surface);
      border: 1px solid var(--border);
      z-index: var(--z-table-body);
    }

    .invoice-thumbnail {
      border: 1px solid var(--border);
      background: var(--muted-surface);
    }

    /* Main image button inside attachment wrapper */
    .attachment-thumb-wrapper > button:not(.modal-close) {
      position: relative;
      z-index: var(--z-table-cell-content);
    }

    .attachment-count-badge {
      background: color-mix(in srgb, var(--brand-warm) 18%, var(--surface));
      border: 1px solid color-mix(in srgb, var(--brand-warm) 36%, var(--border));
      color: var(--primary-text);
      z-index: var(--z-table-thumb-badge);
    }

    /* Clear / delete button inside attachment wrapper */
    .attachment-thumb-wrapper .modal-close {
      z-index: var(--z-table-clear-btn);
    }

    .table-icon-action {
      color: var(--secondary-text);
      transition: background-color 0.18s ease, color 0.18s ease;
    }

    .table-icon-action:hover {
      background: var(--muted-surface);
      color: var(--primary-text);
    }

    .table-icon-action--danger {
      color: var(--danger);
    }

    .table-icon-action--danger:hover {
      background: var(--danger-bg);
      color: var(--danger);
    }

    .status-badge {
      display: inline-flex;
      align-items: center;
      border: 1px solid var(--border);
      background: var(--muted-surface);
      color: var(--secondary-text);
      font-weight: 600;
    }

    .status-badge--processing,
    .status-badge--info,
    .status-badge--manual,
    .status-badge--cached,
    .status-badge--enhanced {
      background: var(--info-bg);
      border-color: color-mix(in srgb, var(--focus-ring) 24%, var(--border));
      color: var(--primary-text);
    }

    .status-badge--review {
      background: var(--warning-bg);
      border-color: color-mix(in srgb, var(--warning) 30%, var(--border));
      color: var(--warning);
    }

    .status-badge--ready {
      background: var(--success-bg);
      border-color: color-mix(in srgb, var(--success) 28%, var(--border));
      color: var(--success);
    }

    .status-badge--failed {
      background: var(--danger-bg);
      border-color: color-mix(in srgb, var(--danger) 28%, var(--border));
      color: var(--danger);
    }

    .status-badge--neutral {
      background: var(--muted-surface);
      border-color: var(--border);
      color: var(--secondary-text);
    }

    .invoice-detail-row {
      background: color-mix(in srgb, var(--muted-surface) 72%, var(--surface) 28%);
    }

    .invoice-detail-panel {
      border-bottom: 1px solid var(--border);
    }

    .invoice-helper-text {
      color: var(--tertiary-text);
    }

    .invoice-warning-list {
      color: var(--warning);
    }

    .row-action {
      border: 1px solid var(--border);
      background: var(--secondary-button-bg);
      color: var(--secondary-button-text);
      font-weight: 600;
      transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
    }

    .row-action:hover {
      background: var(--muted-surface);
      border-color: color-mix(in srgb, var(--primary-text) 20%, var(--border));
      transform: translateY(-1px);
    }

    .row-action--primary {
      background: var(--primary-button-bg);
      border-color: var(--primary-button-bg);
      color: var(--primary-button-text);
    }

    .row-action--danger {
      border-color: color-mix(in srgb, var(--danger) 32%, var(--border));
      background: var(--danger-bg);
      color: var(--danger);
    }

    .table-label {
      color: var(--tertiary-text);
    }

    .invoice-table-summary {
      background: var(--surface-elevated);
      border-top: 1px solid var(--border);
    }

    .invoice-total-label {
      color: var(--secondary-text);
    }

    .money-cell,
    .money-input {
      font-variant-numeric: tabular-nums;
      text-align: right;
    }

    .invoice-total-value {
      color: var(--primary-text);
      font-variant-numeric: tabular-nums;
    }

    .table-empty-state {
      color: var(--secondary-text);
    }

    /* Scrollbar */
    ::-webkit-scrollbar {
      width: 8px;
      height: 8px;
    }

    ::-webkit-scrollbar-track {
      background: var(--background);
    }

    ::-webkit-scrollbar-thumb {
      background: var(--border);
      border-radius: 4px;
    }

    ::-webkit-scrollbar-thumb:hover {
      background: var(--tertiary-text);
    }

    /* PDF Preview Specific Styles */
    .pdf-preview-container {
      background-color: #ffffff;
      color: #000000;
      padding: 20mm;
      box-sizing: border-box;
      font-family: 'Noto Sans SC', sans-serif;
      font-size: 10pt;
      line-height: 1.5;
    }

    .pdf-preview-container h1 {
      font-size: 20pt;
      text-align: center;
      margin-bottom: 20pt;
      font-weight: bold;
    }

    .pdf-preview-container .info-section {
      display: flex;
      justify-content: space-between;
      margin-bottom: 15pt;
      border-bottom: 1px solid #eee;
      padding-bottom: 5pt;
    }

    .pdf-preview-container .info-item {
      flex: 1;
      margin-right: 10pt;
    }

    .pdf-preview-container .info-item:last-child {
      margin-right: 0;
    }

    .pdf-preview-container .info-label {
      font-weight: bold;
      margin-right: 5pt;
    }

    .pdf-preview-container table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 20pt;
    }

    .pdf-preview-container th,
    .pdf-preview-container td {
      border: 1px solid #ddd;
      padding: 8pt;
      text-align: left;
    }

    .pdf-preview-container th {
      background-color: #f2f2f2;
      font-weight: bold;
    }

    .pdf-preview-container .total-row {
      font-weight: bold;
      background-color: #f9f9f9;
    }

    .pdf-preview-container .signature-section {
      display: flex;
      justify-content: space-around;
      margin-top: 40pt;
      text-align: center;
    }

    .pdf-preview-container .signature-item {
      flex: 1;
    }

    .pdf-preview-container .signature-line {
      border-bottom: 1px solid #000;
      width: 80%;
      margin: 10pt auto 0;
    }