/* ==========================================================
   Cronopro — Stylesheet
   Design language: timing-board precision. A near-black surface,
   tabular monospace digits treated like a split-flap display, and
   a single signal-green accent (borrowed from race-timing gantries)
   that marks whatever is currently "live".
   ========================================================== */

@font-face {
  /* No external fonts: rely entirely on system font stacks so the
     app never needs network access to render correctly. */
}

:root {
  --font-display: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Consolas, "Liberation Mono", monospace;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;

  --dur-fast: 120ms;
  --dur-med: 220ms;

  /* ---- Accent palettes (selectable in settings) ---- */
  --accent-mint: #00e5a0;
  --accent-amber: #ff9d3d;
  --accent-cobalt: #4d9fff;
  --accent-crimson: #ff5470;

  --accent: var(--accent-mint);
  --accent-contrast: #06110d;

  --danger: #ff5470;
  --warning: #ff9d3d;
  --success: #00e5a0;
}

/* ---------- Dark theme (default) ---------- */
[data-theme="dark"] {
  --bg: #0a0d10;
  --bg-elevated: #12161b;
  --surface: #171c22;
  --surface-2: #1e242b;
  --border: #262d35;
  --text: #eef2f4;
  --text-muted: #8b97a3;
  --text-dim: #5b6672;
  --shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
}

/* ---------- Light theme ---------- */
[data-theme="light"] {
  --bg: #f4f6f7;
  --bg-elevated: #ffffff;
  --surface: #ffffff;
  --surface-2: #eef1f2;
  --border: #dde2e5;
  --text: #10161b;
  --text-muted: #57646d;
  --text-dim: #8a97a1;
  --shadow: 0 8px 24px rgba(20, 30, 35, 0.08);
  --accent-contrast: #06110d;
}

/* ---------- High contrast theme ---------- */
[data-theme="high-contrast"] {
  --bg: #000000;
  --bg-elevated: #000000;
  --surface: #000000;
  --surface-2: #111111;
  --border: #ffffff;
  --text: #ffffff;
  --text-muted: #ffffff;
  --text-dim: #cccccc;
  --shadow: none;
  --accent: #ffff00;
  --accent-contrast: #000000;
  --danger: #ff6666;
  --warning: #ffff00;
  --success: #66ff66;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

[data-theme="high-contrast"] * { border-color: var(--border) !important; }

.tabular { font-variant-numeric: tabular-nums; font-feature-settings: "tnum" 1; }

button { font-family: inherit; }
a { color: inherit; }

/* Reduced motion */
[data-reduce-motion="true"] * {
  animation-duration: 0.001ms !important;
  transition-duration: 0.001ms !important;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

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

/* ---------- App shell ---------- */
#app {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
  position: sticky;
  top: 0;
  z-index: 20;
}
.topbar__back {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.topbar__back.is-visible { display: inline-flex; }
.topbar__title { font-weight: 700; font-size: 1.05rem; flex: 1; }
.topbar__brand { display: flex; align-items: center; gap: var(--space-2); font-weight: 800; letter-spacing: -0.02em; }
.topbar__brand-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.topbar__icon-btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 1.05rem;
}
.topbar__icon-btn:hover { border-color: var(--accent); }

main { flex: 1; display: flex; flex-direction: column; }

.screen { display: none; flex: 1; flex-direction: column; padding: var(--space-4); max-width: 720px; margin: 0 auto; width: 100%; }
.screen.is-active { display: flex; }

/* ---------- Home ---------- */
.home__subtitle { color: var(--text-muted); margin: 0 0 var(--space-5); }
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-3);
}
.mode-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: left;
  cursor: pointer;
  color: var(--text);
  transition: transform var(--dur-fast) ease, border-color var(--dur-fast) ease;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-height: 130px;
}
.mode-card:hover { transform: translateY(-2px); border-color: var(--accent); }
.mode-card__icon { font-size: 1.6rem; }
.mode-card__title { font-weight: 700; font-size: 1.05rem; }
.mode-card__desc { color: var(--text-muted); font-size: 0.88rem; line-height: 1.4; }

.install-banner {
  margin-top: var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.install-banner[hidden] { display: none; }
.install-banner p { margin: 0; color: var(--text-muted); font-size: 0.9rem; }

/* ---------- Buttons ---------- */
.btn {
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  padding: var(--space-3) var(--space-5);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  justify-content: center;
  min-height: 48px;
  transition: transform var(--dur-fast) ease, background var(--dur-fast) ease;
}
.btn:active { transform: scale(0.97); }
.btn--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-contrast); }
.btn--danger { background: var(--danger); border-color: var(--danger); color: #1a0407; }
.btn--ghost { background: transparent; }
.btn--big { min-height: 64px; font-size: 1.15rem; padding: var(--space-4) var(--space-6); }
.btn--icon { min-width: 48px; padding: var(--space-3); }
.btn[disabled] { opacity: 0.4; cursor: not-allowed; }
.btn-row { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.btn-row--center { justify-content: center; }

/* ---------- Timer display ---------- */
.timer-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-3);
  text-align: center;
  position: relative;
}
.timer-stage__status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.timer-stage__status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-dim); }
.timer-stage__status.is-running .timer-stage__status-dot { background: var(--success); box-shadow: 0 0 10px var(--success); }
.timer-stage__status.is-paused .timer-stage__status-dot { background: var(--warning); }
.timer-stage__status.is-stopped .timer-stage__status-dot { background: var(--danger); }

.timer-display {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.6rem, 13vw, 5.4rem);
  line-height: 1;
  letter-spacing: -0.01em;
  padding: var(--space-3) 0;
}
[data-timer-size="small"] .timer-display { font-size: clamp(2rem, 9vw, 3.6rem); }
[data-timer-size="huge"] .timer-display { font-size: clamp(3rem, 18vw, 7.5rem); }

.timer-display.is-critical { color: var(--danger); }
.timer-display.is-warning { color: var(--warning); }

.timer-scanline {
  height: 2px;
  width: 64px;
  background: var(--accent);
  border-radius: 2px;
  opacity: 0.5;
}
.timer-stage__status.is-running ~ .timer-scanline,
.timer-display.is-running + .timer-scanline { opacity: 1; box-shadow: 0 0 8px var(--accent); }

.timer-meta {
  display: flex;
  gap: var(--space-5);
  color: var(--text-muted);
  font-size: 0.9rem;
  flex-wrap: wrap;
  justify-content: center;
}
.timer-meta b { color: var(--text); font-family: var(--font-display); }

.lock-overlay {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-4);
  z-index: 50;
  text-align: center;
  padding: var(--space-4);
}
.lock-overlay[hidden] { display: none; }

/* ---------- Laps ---------- */
.laps-section { margin-top: var(--space-5); }
.laps-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-2); }
.laps-header h2 { font-size: 1rem; margin: 0; }
.laps-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-2); }
.lap-row {
  display: grid;
  grid-template-columns: 2.4rem 1fr 1fr auto;
  gap: var(--space-3);
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  font-size: 0.92rem;
}
.lap-row__n { color: var(--text-dim); font-family: var(--font-display); }
.lap-row__time { font-family: var(--font-display); font-weight: 600; }
.lap-row__total { font-family: var(--font-display); color: var(--text-muted); font-size: 0.85rem; }
.lap-row__badge { font-size: 0.72rem; padding: 2px 8px; border-radius: 999px; font-weight: 700; }
.lap-row--best { border-color: var(--success); }
.lap-row--best .lap-row__badge { background: color-mix(in srgb, var(--success) 25%, transparent); color: var(--success); }
.lap-row--worst .lap-row__badge { background: color-mix(in srgb, var(--danger) 25%, transparent); color: var(--danger); }
.empty-state { color: var(--text-dim); text-align: center; padding: var(--space-6) var(--space-3); font-size: 0.92rem; }

/* ---------- Forms ---------- */
.field { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-4); }
.field label { font-size: 0.88rem; font-weight: 600; color: var(--text-muted); }
.field input[type="text"], .field input[type="number"], .field select, .field textarea {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  font-size: 1rem;
  font-family: inherit;
  min-height: 44px;
}
.field textarea { min-height: 80px; resize: vertical; }
.field-row { display: flex; gap: var(--space-3); }
.field-row .field { flex: 1; }

.time-picker { display: flex; gap: var(--space-3); justify-content: center; margin: var(--space-4) 0; }
.time-picker__unit { display: flex; flex-direction: column; align-items: center; gap: var(--space-2); }
.time-picker__unit label { font-size: 0.78rem; color: var(--text-muted); text-transform: uppercase; }
.time-picker__stepper { display: flex; flex-direction: column; align-items: center; gap: var(--space-1); }
.time-picker__value { font-family: var(--font-display); font-size: 2rem; width: 3.2ch; text-align: center; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: var(--space-2) 0; }
.time-picker__step-btn { width: 40px; height: 36px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface-2); color: var(--text); font-size: 1.1rem; cursor: pointer; }

.chip-row { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-4); }
.chip {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  padding: var(--space-2) var(--space-4);
  font-size: 0.86rem;
  cursor: pointer;
}
.chip.is-selected { border-color: var(--accent); color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }

/* ---------- Intervals editor ---------- */
.phase-badge { display: inline-flex; align-items: center; gap: var(--space-2); padding: var(--space-2) var(--space-4); border-radius: 999px; font-weight: 700; font-size: 0.95rem; }
.phase-badge--prepare { background: color-mix(in srgb, var(--warning) 20%, transparent); color: var(--warning); }
.phase-badge--work { background: color-mix(in srgb, var(--success) 20%, transparent); color: var(--success); }
.phase-badge--rest { background: color-mix(in srgb, var(--accent-cobalt) 20%, transparent); color: var(--accent-cobalt); }

/* ---------- Chess ---------- */
.chess-board { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); flex: 1; }
.chess-player {
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  min-height: 200px;
  background: var(--surface);
  cursor: pointer;
}
.chess-player.is-active { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--surface)); }
.chess-player.is-out { border-color: var(--danger); }
.chess-player__name { font-weight: 700; color: var(--text-muted); }
.chess-player__time { font-family: var(--font-display); font-size: clamp(1.8rem, 8vw, 3rem); }
@media (min-width: 640px) { .chess-board { grid-template-columns: 1fr 1fr; } }

/* ---------- History ---------- */
.history-toolbar { display: flex; gap: var(--space-2); margin-bottom: var(--space-4); flex-wrap: wrap; }
.history-toolbar input[type="search"] {
  flex: 1; min-width: 160px; background: var(--surface); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius-sm); padding: var(--space-3); min-height: 44px;
}
.session-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-3); }
.session-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: var(--space-4); }
.session-card__head { display: flex; justify-content: space-between; gap: var(--space-3); align-items: baseline; }
.session-card__name { font-weight: 700; }
.session-card__time { font-family: var(--font-display); color: var(--accent); }
.session-card__meta { color: var(--text-muted); font-size: 0.85rem; margin-top: var(--space-1); }
.session-card__actions { display: flex; gap: var(--space-2); margin-top: var(--space-3); flex-wrap: wrap; }
.session-card__actions .btn { padding: var(--space-2) var(--space-3); min-height: 38px; font-size: 0.85rem; }

/* ---------- Settings ---------- */
.settings-group { margin-bottom: var(--space-6); }
.settings-group h2 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); margin-bottom: var(--space-3); }
.settings-row {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3);
  padding: var(--space-3) 0; border-bottom: 1px solid var(--border);
}
.settings-row:last-child { border-bottom: none; }
.settings-row__label { font-weight: 600; }
.settings-row__desc { font-size: 0.82rem; color: var(--text-muted); margin-top: 2px; }

.switch { position: relative; width: 46px; height: 26px; flex-shrink: 0; }
.switch input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.switch__track { position: absolute; inset: 0; background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; transition: background var(--dur-fast); }
.switch__thumb { position: absolute; top: 2px; left: 2px; width: 20px; height: 20px; border-radius: 50%; background: var(--text-dim); transition: transform var(--dur-fast); }
.switch input:checked + .switch__track { background: color-mix(in srgb, var(--accent) 35%, var(--surface-2)); border-color: var(--accent); }
.switch input:checked + .switch__track + .switch__thumb { transform: translateX(20px); background: var(--accent); }

.accent-swatches { display: flex; gap: var(--space-2); }
.accent-swatch { width: 32px; height: 32px; border-radius: 50%; border: 2px solid transparent; cursor: pointer; }
.accent-swatch.is-selected { border-color: var(--text); }

/* ---------- Help ---------- */
.kbd { font-family: var(--font-display); background: var(--surface-2); border: 1px solid var(--border); border-radius: 6px; padding: 2px 8px; font-size: 0.85rem; }
.shortcut-row { display: flex; justify-content: space-between; padding: var(--space-2) 0; border-bottom: 1px solid var(--border); align-items: center; }

/* ---------- Toast / modal ---------- */
.toast {
  position: fixed; left: 50%; bottom: var(--space-6); transform: translateX(-50%);
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text);
  padding: var(--space-3) var(--space-5); border-radius: var(--radius-md); box-shadow: var(--shadow);
  z-index: 60; font-size: 0.92rem; max-width: 90vw;
}
.toast[hidden] { display: none; }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55);
  display: flex; align-items: center; justify-content: center; z-index: 70; padding: var(--space-4);
}
.modal-backdrop[hidden] { display: none; }
.modal {
  background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: var(--space-5); max-width: 420px; width: 100%; box-shadow: var(--shadow);
}
.modal h2 { margin-top: 0; }
.modal__actions { display: flex; justify-content: flex-end; gap: var(--space-3); margin-top: var(--space-5); }

/* ---------- Fullscreen mode ---------- */
.is-fullscreen-mode .topbar,
.is-fullscreen-mode .laps-section,
.is-fullscreen-mode .secondary-controls,
.is-fullscreen-mode .home__subtitle {
  display: none !important;
}
.is-fullscreen-mode .timer-display { font-size: clamp(4rem, 22vw, 11rem); }
.is-fullscreen-mode .screen { justify-content: center; }

/* ---------- Responsive ---------- */
@media (max-width: 480px) {
  .lap-row { grid-template-columns: 2rem 1fr auto; }
  .lap-row__total { display: none; }
}

@media (min-width: 860px) {
  .screen { max-width: 860px; }
  .btn--big { min-width: 200px; }
}

.offline-pill {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-size: 0.78rem; color: var(--text-muted); background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 999px; padding: 4px 10px;
}
.offline-pill__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-dim); }
.offline-pill.is-offline .offline-pill__dot { background: var(--warning); }