/* ---------- Design tokens ---------- */
  :root {
    color-scheme: light;
    --bg: #ffffff;
    --bg-soft: #f5f5f6;
    --bg-sunken: #fafafa;
    --surface: #ffffff;
    --ink: #1a1a1c;
    --ink-secondary: #55555c;
    --ink-muted: #85858e;
    --ink-faint: #a4a4ab;
    --hairline: #e4e4e7;
    --hairline-strong: #cfcfd4;
    --accent: #3d4a63;
    --accent-active: #2c374c;
    --accent-soft: rgba(61,74,99,0.08);
    --accent-ring: rgba(61,74,99,0.18);
    --success: #2f8a5b;
    --success-soft: #eaf6ef;
    --success-border: #c9e6d6;
    --success-ring: rgba(47,138,91,0.35);
    --danger: #b23b34;
    --danger-active: #94302a;
    --danger-soft: #fbeceb;
    --warning: #8a650e;
    --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans", "Yu Gothic", sans-serif;

    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-inout-strong: cubic-bezier(0.83, 0, 0.17, 1);
    --ease-puyo: cubic-bezier(0.34, 1.56, 0.64, 1);
  }

  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
      color-scheme: dark;
      --bg: #17171a;
      --bg-soft: #1c1c20;
      --bg-sunken: #1f1f23;
      --surface: #1f1f23;
      --ink: #f1f1f3;
      --ink-secondary: #c5c5cb;
      --ink-muted: #94949c;
      --ink-faint: #6c6c74;
      --hairline: rgba(255,255,255,0.09);
      --hairline-strong: rgba(255,255,255,0.16);
      --accent: #8b9ac0;
      --accent-active: #a4b1d1;
      --accent-soft: rgba(139,154,192,0.14);
      --accent-ring: rgba(139,154,192,0.28);
      --success: #6fbf91;
      --success-soft: rgba(111,191,145,0.10);
      --success-border: rgba(111,191,145,0.32);
      --success-ring: rgba(111,191,145,0.4);
      --danger: #e28783;
      --danger-active: #e9a09c;
      --danger-soft: rgba(226,135,131,0.12);
      --warning: #e2c36d;
    }
  }

  :root[data-theme="dark"] {
    color-scheme: dark;
    --bg: #17171a;
    --bg-soft: #1c1c20;
    --bg-sunken: #1f1f23;
    --surface: #1f1f23;
    --ink: #f1f1f3;
    --ink-secondary: #c5c5cb;
    --ink-muted: #94949c;
    --ink-faint: #6c6c74;
    --hairline: rgba(255,255,255,0.09);
    --hairline-strong: rgba(255,255,255,0.16);
    --accent: #8b9ac0;
    --accent-active: #a4b1d1;
    --accent-soft: rgba(139,154,192,0.14);
    --accent-ring: rgba(139,154,192,0.28);
    --success: #6fbf91;
    --success-soft: rgba(111,191,145,0.10);
    --success-border: rgba(111,191,145,0.32);
    --success-ring: rgba(111,191,145,0.4);
    --danger: #e28783;
    --danger-active: #e9a09c;
    --danger-soft: rgba(226,135,131,0.12);
    --warning: #e2c36d;
  }

  :root[data-theme="light"] {
    color-scheme: light;
    --bg: #ffffff;
    --bg-soft: #f5f5f6;
    --bg-sunken: #fafafa;
    --surface: #ffffff;
    --ink: #1a1a1c;
    --ink-secondary: #55555c;
    --ink-muted: #85858e;
    --ink-faint: #a4a4ab;
    --hairline: #e4e4e7;
    --hairline-strong: #cfcfd4;
    --accent: #3d4a63;
    --accent-active: #2c374c;
    --accent-soft: rgba(61,74,99,0.08);
    --accent-ring: rgba(61,74,99,0.18);
    --success: #2f8a5b;
    --success-soft: #eaf6ef;
    --success-border: #c9e6d6;
    --success-ring: rgba(47,138,91,0.35);
    --danger: #b23b34;
    --danger-active: #94302a;
    --danger-soft: #fbeceb;
  }

  * { box-sizing: border-box; }

  body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--sans);
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s ease, color 0.3s ease;
  }

  .page {
    max-width: 980px;
    margin: 0 auto;
    padding: 20px 16px 64px;
  }

  /* ---------- Reveal (page-load choreography, once) ---------- */
  .reveal {
    clip-path: inset(0 100% 0 0);
    transform: translateY(6px);
    opacity: 0;
    animation: reveal-in 0.6s var(--ease-out-expo) forwards;
  }
  @keyframes reveal-in {
    0% { clip-path: inset(0 100% 0 0); transform: translateY(6px); opacity: 0; }
    60% { opacity: 1; }
    100% { clip-path: inset(0 0 0 0); transform: translateY(0); opacity: 1; }
  }
  .reveal-1 { animation-delay: 0ms; }
  .reveal-2 { animation-delay: 90ms; }
  .reveal-3 { animation-delay: 180ms; }
  .reveal-4 { animation-delay: 270ms; }
  .reveal-5 { animation-delay: 360ms; }

  @media (prefers-reduced-motion: reduce) {
    .reveal { animation: none !important; clip-path: none !important; transform: none !important; opacity: 1 !important; }
    * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
  }

  /* ---------- Header ---------- */
  .header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 4px 4px 22px;
    flex-wrap: wrap;
  }
  .header-id {
    display: flex;
    align-items: baseline;
    gap: 10px;
    flex-wrap: wrap;
    min-width: 0;
  }
  .header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .settings-link {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0 14px;
    border: 1px solid var(--hairline);
    border-radius: 999px;
    background: var(--surface);
    color: var(--ink-secondary);
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
  }
  .settings-link:hover { border-color: var(--hairline-strong); color: var(--ink); }
  .settings-link:focus-visible { outline: 3px solid var(--accent-ring); outline-offset: 2px; }
  button.settings-link { appearance: none; cursor: pointer; font-family: inherit; }
  .settings-hint { flex-basis: 100%; margin: 0; padding: 10px 14px; border: 1px solid var(--hairline); border-radius: 8px; background: var(--bg-soft); color: var(--ink-muted); font-size: 12px; line-height: 1.55; }
  .eyebrow {
    display: block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin: 0 0 3px;
  }
  .agent-name {
    font-family: var(--sans);
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 0;
    color: var(--ink);
  }
  .tts-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-sunken);
    border: 1px solid var(--hairline);
    color: var(--ink-secondary);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
    padding: 5px 12px;
    border-radius: 999px;
    white-space: nowrap;
  }

  .theme-toggle {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--surface);
    border: 1px solid var(--hairline);
    border-radius: 999px;
    padding: 6px 8px 6px 12px;
    cursor: pointer;
    font-family: var(--sans);
    color: var(--ink-secondary);
    font-size: 12px;
    font-weight: 600;
    min-height: 44px;
    transition: border-color 0.2s;
  }
  .theme-toggle:hover { border-color: var(--hairline-strong); }
  .switch {
    position: relative;
    width: 36px;
    height: 20px;
    border-radius: 999px;
    background: var(--hairline);
    transition: background 0.25s ease;
    flex-shrink: 0;
  }
  .switch::after {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--surface);
    box-shadow: 0 1px 2px rgba(0,0,0,0.2);
    transition: transform 0.25s var(--ease-out-expo);
  }
  [data-dark="true"] .switch { background: var(--accent); }
  [data-dark="true"] .switch::after { transform: translateX(16px); }

  /* ---------- Layout grid ---------- */
  .grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
  }
  @media (min-width: 760px) {
    .grid { grid-template-columns: 1.15fr 0.85fr; align-items: start; }
  }
  .col-main, .col-side { display: flex; flex-direction: column; gap: 16px; }

  /* ---------- Card base ---------- */
  .card {
    background: var(--surface);
    border: 1px solid var(--hairline);
    border-radius: 10px;
    padding: 22px;
    transition: border-color 0.25s, transform 0.25s;
  }
  .card:hover { border-color: var(--hairline-strong); transform: translateY(-1px); }

  .card-title {
    font-size: 15px;
    font-weight: 700;
    margin: 0 0 4px;
    letter-spacing: -0.005em;
  }
  .card-sub {
    font-size: 13px;
    color: var(--ink-muted);
    margin: 0 0 16px;
  }

  /* ---------- Launch card ---------- */
  label.field-label {
    display: block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-muted);
    margin-bottom: 8px;
  }
  textarea {
    width: 100%;
    min-height: 96px;
    resize: vertical;
    padding: 12px 14px;
    font-family: var(--sans);
    font-size: 15px;
    line-height: 1.55;
    color: var(--ink);
    background: var(--bg-sunken);
    border: 1px solid var(--hairline);
    border-radius: 8px;
    transition: border-color 0.15s, box-shadow 0.15s;
  }
  textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
  }
  .field-status-wrap { margin-top: 8px; min-height: 20px; overflow: hidden; }
  .field-status {
    font-size: 13px;
    color: var(--ink-muted);
    clip-path: inset(0 0 0 0);
  }
  .field-status.animate-in { animation: status-reveal 0.3s var(--ease-inout-strong); }
  @keyframes status-reveal {
    0% { clip-path: inset(0 100% 0 0); }
    100% { clip-path: inset(0 0 0 0); }
  }
  .field-status.detected { color: var(--success); font-weight: 600; }
  .field-status.notfound { color: var(--danger); }

  .readiness-panel { margin: 16px 0 10px; padding: 12px 14px; border: 1px solid var(--hairline); border-radius: 8px; background: var(--bg-soft); }
  .readiness-lines { display: grid; gap: 7px; }
  .readiness-line { margin: 0; font-size: 12px; line-height: 1.55; }
  .readiness-line.blocker, .readiness-line.blocker a { color: var(--danger); }
  .readiness-line.warning { color: var(--warning); }
  .readiness-line.pending { color: var(--ink-muted); }
  .readiness-line.info { color: var(--ink-muted); }
  .readiness-line a { font-weight: 650; text-underline-offset: 2px; }
  .readiness-copy { margin-left: 8px; padding: 2px 7px; border: 1px solid currentColor; border-radius: 999px; color: inherit; background: transparent; cursor: pointer; font-size: 10px; }
  .readiness-recheck { margin-top: 10px; padding: 7px 11px; border: 1px solid var(--hairline-strong); border-radius: 8px; color: var(--ink); background: var(--surface); cursor: pointer; font-size: 11px; font-weight: 700; }
  .readiness-recheck:disabled { cursor: wait; opacity: .55; }
  .field-hint {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: var(--ink-faint);
  }

  /* ---------- Buttons ---------- */
  .btn {
    appearance: none;
    cursor: pointer;
    font-family: var(--sans);
    font-weight: 600;
    font-size: 15px;
    min-height: 46px;
    border-radius: 8px;
    padding: 0 22px;
  }

  .btn-primary {
    position: relative;
    overflow: hidden;
    width: 100%;
    margin-top: 18px;
    background: var(--bg-sunken);
    border: 1px solid var(--hairline-strong);
    color: var(--ink);
    transition: border-color 0.25s, color 0.35s var(--ease-inout-strong), opacity 0.15s;
  }
  .btn-primary::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--ink);
    transform: translateX(-101%);
    transition: transform 0.35s var(--ease-inout-strong);
    z-index: 0;
  }
  .btn-primary .btn-label { position: relative; z-index: 1; }
  .btn-primary:hover:not(:disabled) { border-color: var(--ink); color: var(--bg); }
  .btn-primary:hover:not(:disabled)::before { transform: translateX(0); }
  .btn-primary:active:not(:disabled) { transform: scale(0.97); transition: transform 0.25s var(--ease-puyo); }
  .btn-primary:disabled { background: var(--bg-sunken); border-color: var(--hairline); color: var(--ink-faint); cursor: not-allowed; }
  .btn-primary:disabled::before { display: none; }

  .btn-danger {
    background: var(--danger);
    color: #ffffff;
    border: none;
    min-height: 44px;
    padding: 0 20px;
    transition: background 0.2s, transform 0.15s var(--ease-puyo);
  }
  .btn-danger:hover:not(:disabled) { background: var(--danger-active); }
  .btn-danger:active:not(:disabled) { transform: scale(0.97); }
  .btn-danger:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

  /* ---------- Active session card ---------- */
  .active-card {
    background: var(--success-soft);
    border: 1px solid var(--success-border);
    border-radius: 10px;
    padding: 20px 22px;
    transition: border-color 0.25s, transform 0.25s;
  }
  .active-card:hover { transform: translateY(-1px); }
  .active-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
  }
  .active-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    color: var(--success);
    font-size: 14px;
    letter-spacing: 0.01em;
  }
  .pulse-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--success);
    animation: pulse-ring 2s infinite;
  }
  @keyframes pulse-ring {
    0% { box-shadow: 0 0 0 0 var(--success-ring); }
    70% { box-shadow: 0 0 0 8px rgba(0,0,0,0); }
    100% { box-shadow: 0 0 0 0 rgba(0,0,0,0); }
  }
  .active-timer {
    font-variant-numeric: tabular-nums;
    font-size: 20px;
    font-weight: 700;
    color: var(--ink);
  }
  .active-url {
    margin-top: 10px;
    font-size: 13px;
    color: var(--ink-secondary);
    word-break: break-all;
  }
  .active-meta {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 12px;
    font-size: 13px;
    color: var(--ink-secondary);
  }
  .active-meta span { display: inline-flex; align-items: center; gap: 5px; }
  .active-actions { margin-top: 16px; }
  .active-card.ended { background: var(--bg-sunken); border-color: var(--hairline); }
  .active-card.ended .active-label { color: var(--ink-muted); }
  .active-card.ended .pulse-dot { display: none; }

  /* ---------- Metrics ---------- */
  .stat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .stat {
    background: var(--bg-sunken);
    border: 1px solid var(--hairline);
    border-radius: 8px;
    padding: 14px;
    transition: border-color 0.2s;
  }
  .stat:hover { border-color: var(--hairline-strong); }
  .stat-value {
    font-size: 22px;
    font-weight: 700;
    color: var(--ink);
    line-height: 1.1;
    font-variant-numeric: tabular-nums;
  }
  .stat-label {
    margin-top: 4px;
    font-size: 11px;
    letter-spacing: 0.04em;
    color: var(--ink-muted);
    font-weight: 500;
  }

  .recent-list {
    margin-top: 16px;
    border-top: 1px solid var(--hairline);
    padding-top: 4px;
  }
  .recent-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 9px 0;
    font-size: 13px;
    color: var(--ink-secondary);
  }
  .recent-row + .recent-row { border-top: 1px solid var(--hairline); }
  .recent-time { color: var(--ink-faint); font-variant-numeric: tabular-nums; }
  .recent-status { font-weight: 600; }
  .recent-status.ok { color: var(--success); }
  .recent-status.warn { color: var(--danger); }

  /* ---------- Tool link ---------- */
  .link-button {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    min-height: 46px;
    background: var(--bg-sunken);
    border: 1px solid var(--hairline);
    border-radius: 8px;
    color: var(--ink-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    overflow: hidden;
    transition: border-color 0.2s, color 0.2s;
  }
  .link-button::after {
    content: "";
    position: absolute;
    left: 14px; right: 14px; bottom: 9px;
    height: 1px;
    background: var(--ink);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s var(--ease-inout-strong);
  }
  .link-button:hover { color: var(--ink); border-color: var(--hairline-strong); }
  .link-button:hover::after { transform: scaleX(1); transform-origin: left; }

  a { color: inherit; }

  .install-banner {
    position: fixed;
    left: 16px;
    right: 16px;
    bottom: 16px;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    max-width: 640px;
    margin: 0 auto;
    padding: 12px 14px;
    background: var(--surface);
    border: 1px solid var(--hairline-strong);
    border-radius: 8px;
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
  }
  .install-copy {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 13px;
    color: var(--ink-secondary);
  }
  .install-copy strong {
    color: var(--ink);
    font-size: 14px;
  }
  .install-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
  }
  .install-action,
  .install-dismiss {
    appearance: none;
    cursor: pointer;
    font-family: var(--sans);
    font-weight: 700;
    border-radius: 8px;
    min-height: 38px;
  }
  .install-action {
    padding: 0 14px;
    background: var(--ink);
    color: var(--bg);
    border: 1px solid var(--ink);
  }
  .install-dismiss {
    width: 38px;
    padding: 0;
    background: var(--bg-sunken);
    color: var(--ink-secondary);
    border: 1px solid var(--hairline);
    font-size: 20px;
    line-height: 1;
  }
  .install-action:hover { background: var(--accent-active); border-color: var(--accent-active); }
  .install-dismiss:hover { border-color: var(--hairline-strong); color: var(--ink); }

  @media (max-width: 560px) {
    .install-banner {
      align-items: stretch;
      flex-direction: column;
    }
    .install-actions { justify-content: flex-end; }
  }

  .toast {
    margin-top: 12px;
    font-size: 13px;
    padding: 10px 12px;
    border-radius: 8px;
    background: var(--accent-soft);
    color: var(--accent);
    display: none;
  }
  .toast.visible { display: block; }

  .toast.success {
    background: var(--success-soft);
    color: var(--success);
    border: 1px solid var(--success-border);
  }

  .toast.error {
    background: var(--danger-soft);
    color: var(--danger);
    border: 1px solid rgba(178,59,52,0.22);
  }

  .toast.loading {
    background: var(--accent-soft);
    color: var(--accent);
  }

  .is-hidden {
    display: none !important;
  }

  .tools-title {
    margin-bottom: 12px;
  }

  .empty-state {
    color: var(--ink-muted);
  }

  .empty-state .recent-time {
    color: var(--ink-faint);
  }