:root, [data-theme="light"] {
      --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
      --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
      --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
      --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
      --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);

      --space-1: 0.25rem;
      --space-2: 0.5rem;
      --space-3: 0.75rem;
      --space-4: 1rem;
      --space-5: 1.25rem;
      --space-6: 1.5rem;
      --space-8: 2rem;
      --space-10: 2.5rem;
      --space-12: 3rem;
      --space-16: 4rem;

      --color-bg: #f7f6f2;
      --color-surface: #f9f8f5;
      --color-surface-2: #fbfbf9;
      --color-surface-offset: #f3f0ec;
      --color-surface-dynamic: #e6e4df;
      --color-border: #d4d1ca;
      --color-divider: #dcd9d5;
      --color-text: #28251d;
      --color-text-muted: #6f6b63;
      --color-text-faint: #9d998f;
      --color-text-inverse: #f9f8f4;
      --color-primary: #01696f;
      --color-primary-hover: #0c4e54;
      --color-primary-highlight: #cedcd8;
      --color-success: #437a22;
      --color-error: #a12c7b;
      --color-warning: #964219;
      --radius-sm: 0.5rem;
      --radius-md: 0.75rem;
      --radius-lg: 1rem;
      --radius-xl: 1.25rem;
      --radius-full: 9999px;
      --shadow-sm: 0 1px 2px rgba(40,37,29,0.06);
      --shadow-md: 0 10px 30px rgba(40,37,29,0.08);
      --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
      --font-body: 'Satoshi', Inter, sans-serif;
      --font-display: 'Satoshi', Inter, sans-serif;
      --content-wide: 1100px;
    }

    [data-theme="dark"] {
      --color-bg: #171614;
      --color-surface: #1c1b19;
      --color-surface-2: #201f1d;
      --color-surface-offset: #22201e;
      --color-surface-dynamic: #2d2c2a;
      --color-border: #393836;
      --color-divider: #262523;
      --color-text: #ece7df;
      --color-text-muted: #b9b2a8;
      --color-text-faint: #8a847c;
      --color-text-inverse: #2b2a28;
      --color-primary: #4f98a3;
      --color-primary-hover: #6baab2;
      --color-primary-highlight: #313b3b;
      --color-success: #7bb85a;
      --color-error: #d163a7;
      --color-warning: #d28b55;
      --shadow-sm: 0 1px 2px rgba(0,0,0,0.22);
      --shadow-md: 0 12px 36px rgba(0,0,0,0.34);
    }

    @media (prefers-color-scheme: dark) {
      html:not([data-theme]) {
        --color-bg: #171614;
      }
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html {
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      text-rendering: optimizeLegibility;
      scroll-behavior: smooth;
    }
    body {
      min-height: 100dvh;
      font-family: var(--font-body);
      font-size: var(--text-base);
      line-height: 1.6;
      background:
        radial-gradient(circle at top right, color-mix(in oklab, var(--color-primary) 9%, transparent), transparent 30%),
        var(--color-bg);
      color: var(--color-text);
    }
    img, svg { display: block; max-width: 100%; }
    button, input, textarea { font: inherit; color: inherit; }
    button { cursor: pointer; border: none; background: none; }
    input, textarea {
      width: 100%;
      border: 1px solid color-mix(in oklab, var(--color-text) 12%, transparent);
      background: var(--color-surface-2);
      border-radius: var(--radius-md);
      padding: 0.9rem 1rem;
      min-height: 48px;
      outline: none;
      transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive), background var(--transition-interactive);
    }
    textarea { min-height: 110px; resize: vertical; }
    input:focus, textarea:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 0 4px color-mix(in oklab, var(--color-primary) 18%, transparent);
    }
    :focus-visible {
      outline: 2px solid var(--color-primary);
      outline-offset: 3px;
      border-radius: var(--radius-sm);
    }
    .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;
    }

    .app {
      width: min(calc(100% - 2rem), var(--content-wide));
      margin: 0 auto;
      padding: var(--space-6) 0 var(--space-12);
    }

    .skip-link {
      position: absolute; left: var(--space-4); top: -100%;
      background: var(--color-primary); color: var(--color-text-inverse);
      padding: var(--space-3) var(--space-4); border-radius: var(--radius-sm); z-index: 1000;
    }
    .skip-link:focus { top: var(--space-4); }

    .topbar {
      display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
      padding: var(--space-4) 0 var(--space-6);
      flex-wrap: wrap;
    }
    .brand-wrap { display: flex; align-items: center; gap: var(--space-3); }
    .brand-mark {
      width: 44px; height: 44px; border-radius: 14px;
      display: grid; place-items: center; background: var(--color-primary-highlight); color: var(--color-primary);
      box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--color-primary) 18%, transparent);
      flex-shrink: 0;
    }
    .brand-copy small { display: block; color: var(--color-text-muted); font-size: var(--text-xs); }
    .brand-copy h1 { font-size: var(--text-xl); line-height: 1.05; font-weight: 700; letter-spacing: -0.03em; }

    .topbar-actions { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
    .theme-toggle, .icon-btn {
      min-width: 44px; min-height: 44px; border-radius: var(--radius-full);
      display: inline-grid; place-items: center; background: var(--color-surface); border: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
      box-shadow: var(--shadow-sm);
    }
    .theme-toggle:hover, .icon-btn:hover { background: var(--color-surface-offset); }

    .hero {
      display: grid; grid-template-columns: 1.3fr 0.9fr; gap: var(--space-6);
      align-items: stretch; margin-bottom: var(--space-6);
    }
    .panel {
      background: color-mix(in oklab, var(--color-surface) 92%, var(--color-bg));
      border: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-md);
    }
    .summary {
      padding: var(--space-6);
      display: grid; gap: var(--space-5);
    }
    .eyebrow {
      display: inline-flex; align-items: center; gap: var(--space-2);
      width: fit-content; padding: 0.35rem 0.7rem; border-radius: var(--radius-full);
      background: var(--color-primary-highlight); color: var(--color-primary); font-size: var(--text-xs); font-weight: 700;
      letter-spacing: 0.04em; text-transform: uppercase;
    }
    .summary p { color: var(--color-text-muted); max-width: 58ch; }
    .summary-grid {
      display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-4);
    }
    .metric {
      padding: var(--space-4); border-radius: var(--radius-lg); background: var(--color-surface-2);
      border: 1px solid color-mix(in oklab, var(--color-text) 8%, transparent);
    }
    .metric strong {
      display: block; font-size: var(--text-lg); font-variant-numeric: tabular-nums lining-nums;
    }
    .metric span { color: var(--color-text-muted); font-size: var(--text-sm); }

    .controls {
      padding: var(--space-5); display: grid; gap: var(--space-4); align-content: start;
    }
    .field-inline { display: grid; gap: var(--space-2); }
    .field-inline label, .field label {
      font-size: var(--text-sm); font-weight: 700;
    }
    .date-input {
      display: flex; align-items: center; gap: var(--space-3);
      padding: var(--space-2); background: var(--color-surface-2); border-radius: var(--radius-lg);
      border: 1px solid color-mix(in oklab, var(--color-text) 8%, transparent);
    }
    .date-input input {
      border: none; background: transparent; box-shadow: none; min-height: 44px; padding: 0.7rem 0.75rem;
    }
    .helper { color: var(--color-text-muted); font-size: var(--text-sm); }

    .btn {
      min-height: 48px; border-radius: var(--radius-full); padding: 0.85rem 1.2rem;
      display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
      font-size: var(--text-sm); font-weight: 700;
      transition: transform var(--transition-interactive), background var(--transition-interactive), border-color var(--transition-interactive);
    }
    .btn:hover { transform: translateY(-1px); }
    .btn-primary { background: var(--color-primary); color: var(--color-text-inverse); }
    .btn-primary:hover { background: var(--color-primary-hover); }
    .btn-secondary {
      background: var(--color-surface-2); color: var(--color-text);
      border: 1px solid color-mix(in oklab, var(--color-text) 10%, transparent);
    }
    .btn-danger {
      background: color-mix(in oklab, var(--color-error) 12%, var(--color-surface));
      color: var(--color-error);
    }

    .agenda {
      display: grid; gap: var(--space-5);
    }
    .section-card {
      padding: var(--space-5);
      display: grid; gap: var(--space-4);
    }
    .section-head {
      display: flex; align-items: center; justify-content: space-between; gap: var(--space-4);
      flex-wrap: wrap; padding-bottom: var(--space-4); border-bottom: 1px solid var(--color-divider);
    }
    .section-id { display: flex; align-items: center; gap: var(--space-3); }
    .section-icon {
      width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center;
      background: color-mix(in oklab, var(--color-primary) 10%, var(--color-surface));
      color: var(--color-primary);
    }
    .section-title h2 { font-size: var(--text-lg); line-height: 1.1; }
    .section-title p, .section-range { color: var(--color-text-muted); font-size: var(--text-sm); }

    .appointment-list {
      display: grid; gap: var(--space-3);
      content-visibility: auto;
    }
    .appointment {
      display: grid; grid-template-columns: auto 1fr auto; gap: var(--space-4); align-items: start;
      padding: var(--space-4); border-radius: var(--radius-lg); background: var(--color-surface-2);
      border: 1px solid color-mix(in oklab, var(--color-text) 8%, transparent);
    }
    .appointment-time {
      min-width: 68px; padding: 0.5rem 0.75rem; border-radius: var(--radius-full);
      background: var(--color-primary-highlight); color: var(--color-primary);
      font-weight: 700; text-align: center; font-variant-numeric: tabular-nums lining-nums;
    }
    .appointment-main strong { display: block; font-size: var(--text-base); }
    .appointment-meta {
      color: var(--color-text-muted); font-size: var(--text-sm); display: flex; flex-wrap: wrap; gap: 0.35rem 0.75rem;
      margin-top: var(--space-1);
    }
    .appointment-service {
      margin-top: var(--space-2); color: var(--color-text); font-size: var(--text-sm);
    }
    .delete-btn {
      min-width: 44px; min-height: 44px; width: 44px; border-radius: var(--radius-full);
      display: inline-flex; align-items: center; justify-content: center;
      color: var(--color-error); background: color-mix(in oklab, var(--color-error) 10%, transparent);
      transition: background var(--transition-interactive), transform var(--transition-interactive);
    }
    .delete-btn:hover {
      background: color-mix(in oklab, var(--color-error) 16%, transparent);
      transform: translateY(-1px);
    }

    .helper { margin-top: 0.25rem; }

    .empty-state {
      padding: var(--space-6); border-radius: var(--radius-lg); text-align: center;
      color: var(--color-text-muted); background: color-mix(in oklab, var(--color-surface-offset) 75%, var(--color-surface));
      border: 1px dashed color-mix(in oklab, var(--color-text) 16%, transparent);
    }

    .feedback {
      padding: var(--space-4) var(--space-5); border-radius: var(--radius-lg); font-size: var(--text-sm);
      display: none;
    }
    .feedback.show { display: block; }
    .feedback.success { background: color-mix(in oklab, var(--color-success) 12%, var(--color-surface)); color: var(--color-success); }
    .feedback.error { background: color-mix(in oklab, var(--color-error) 12%, var(--color-surface)); color: var(--color-error); }

    dialog {
      width: min(680px, calc(100% - 1.5rem));
      margin: auto; border: none; border-radius: var(--radius-xl);
      background: var(--color-surface); color: var(--color-text); box-shadow: var(--shadow-md);
      padding: 0;
    }
    dialog::backdrop { background: rgba(10, 10, 10, 0.55); backdrop-filter: blur(4px); }
    .modal {
      padding: var(--space-6); display: grid; gap: var(--space-5);
    }
    .modal-head { display: flex; justify-content: space-between; gap: var(--space-4); align-items: start; }
    .modal-head p { color: var(--color-text-muted); font-size: var(--text-sm); max-width: 48ch; }
    .modal-grid {
      display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4);
    }
    .field { display: grid; gap: var(--space-2); }
    .field.full { grid-column: 1 / -1; }
    .error-message {
      min-height: 1.1rem; color: var(--color-error); font-size: var(--text-xs);
    }
    .field.invalid input, .field.invalid textarea {
      border-color: var(--color-error);
      box-shadow: 0 0 0 4px color-mix(in oklab, var(--color-error) 12%, transparent);
    }
    .modal-actions {
      display: flex; justify-content: flex-end; gap: var(--space-3); flex-wrap: wrap;
      padding-top: var(--space-2); border-top: 1px solid var(--color-divider);
    }

    @media (max-width: 920px) {
      .hero { grid-template-columns: 1fr; }
      .summary-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 700px) {
      .app { width: min(calc(100% - 1rem), var(--content-wide)); padding-top: var(--space-4); }
      .topbar { align-items: stretch; }
      .topbar-actions { width: 100%; justify-content: space-between; }
      .topbar-actions .btn-primary { flex: 1; }
      .appointment { grid-template-columns: 1fr; }
      .appointment-time { width: fit-content; }
      .modal-grid { grid-template-columns: 1fr; }
      .section-head { align-items: start; }
      .modal, .summary, .controls, .section-card { padding: var(--space-4); }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after {
        animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important;
      }
    }