/* ==========================================================
   Timekeeper – CSS
   ========================================================== */

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

/* ---------- Theme tokens ---------- */
:root {
  /* Light theme (default) */
  --c-bg: #f8f9fa;
  --c-surface: #ffffff;
  --c-text: #1a1a2e;
  --c-text-muted: #6b7280;
  --c-primary: #3b82f6;
  --c-primary-hover: #2563eb;
  --c-primary-text: #ffffff;
  --c-border: #e5e7eb;
  --c-danger: #ef4444;
  --c-danger-hover: #dc2626;
  --c-warning: #f59e0b;
  --c-info: #06b6d4;
  --c-urgent: #ef4444;
  --c-surface-hover: #f3f4f6;
  --c-shadow: rgba(0, 0, 0, 0.08);

  --radius: 8px;
  --radius-sm: 4px;
  --transition: 0.2s ease;

  color-scheme: light;
}

[data-theme="dark"],
[data-theme="system"]:root:has(no-match) {
  /* dark overrides – applied via JS or media query */
}

/* System preference: dark */
@media (prefers-color-scheme: dark) {
  [data-theme="system"] {
    --c-bg: #0f172a;
    --c-surface: #1e293b;
    --c-text: #e2e8f0;
    --c-text-muted: #94a3b8;
    --c-primary: #60a5fa;
    --c-primary-hover: #3b82f6;
    --c-primary-text: #0f172a;
    --c-border: #334155;
    --c-surface-hover: #334155;
    --c-shadow: rgba(0, 0, 0, 0.3);
    color-scheme: dark;
  }
}

[data-theme="dark"] {
  --c-bg: #0f172a;
  --c-surface: #1e293b;
  --c-text: #e2e8f0;
  --c-text-muted: #94a3b8;
  --c-primary: #60a5fa;
  --c-primary-hover: #3b82f6;
  --c-primary-text: #0f172a;
  --c-border: #334155;
  --c-surface-hover: #334155;
  --c-shadow: rgba(0, 0, 0, 0.3);
  color-scheme: dark;
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* ---------- Body ---------- */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.5;
  min-height: 100dvh;
  transition: background var(--transition), color var(--transition);
}

/* ---------- App shell ---------- */
.app {
  max-width: 540px;
  margin: 0 auto;
  padding: 1rem;
}

/* ---------- Header ---------- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--c-border);
  margin-bottom: 1.5rem;
}

.header__title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header__actions {
  display: flex;
  gap: 0.5rem;
}

/* ---------- Icon button ---------- */
.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-surface);
  color: var(--c-text);
  font-size: 1.25rem;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

.icon-btn:hover {
  background: var(--c-surface-hover);
}

.icon-btn:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

.icon-btn[aria-pressed="true"] {
  background: var(--c-primary);
  color: var(--c-primary-text);
  border-color: var(--c-primary);
}

/* Sound off state */
.icon-btn[aria-pressed="false"] [data-icon="sound"] {
  opacity: 0.4;
}

/* ---------- Timer display ---------- */
.timer-section {
  text-align: center;
  padding: 2rem 0;
}

.timer-display {
  margin-bottom: 1.5rem;
}

.timer-display__value {
  font-size: clamp(2.5rem, 10vw, 6rem);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
  display: block;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  min-width: 44px;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-surface);
  color: var(--c-text);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition),
    opacity var(--transition);
  user-select: none;
}

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

.btn:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

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

.btn--primary {
  background: var(--c-primary);
  color: var(--c-primary-text);
  border-color: var(--c-primary);
}

.btn--primary:hover:not(:disabled) {
  background: var(--c-primary-hover);
  border-color: var(--c-primary-hover);
}

.btn--small {
  min-height: 36px;
  padding: 0.25rem 0.75rem;
  font-size: 0.85rem;
}

.btn--outline {
  background: transparent;
  border-color: var(--c-border);
}

.btn--danger {
  color: var(--c-danger);
  border-color: var(--c-danger);
}

.btn--danger:hover:not(:disabled) {
  background: var(--c-danger);
  color: #fff;
}

/* ---------- Timer controls ---------- */
.timer-controls {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* ---------- Section title ---------- */
.section-title {
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-text-muted);
  margin-bottom: 0.75rem;
}

/* ---------- Presets ---------- */
.presets-section {
  padding: 1.25rem 0;
  border-top: 1px solid var(--c-border);
}

.preset-list {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.preset-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.5rem 1rem;
  border: 2px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-surface);
  color: var(--c-text);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

.preset-btn:hover {
  border-color: var(--c-primary);
  background: var(--c-surface-hover);
}

.preset-btn:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
}

.preset-btn[aria-checked="true"] {
  border-color: var(--c-primary);
  background: var(--c-primary);
  color: var(--c-primary-text);
}

/* ---------- Volume ---------- */
.volume-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 0;
  border-top: 1px solid var(--c-border);
}

.volume-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.volume-slider {
  flex: 1;
  height: 6px;
  accent-color: var(--c-primary);
  cursor: pointer;
}

.volume-value {
  font-size: 0.85rem;
  color: var(--c-text-muted);
  min-width: 3ch;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ---------- Notifications ---------- */
.notifications-section {
  padding: 1.25rem 0;
  border-top: 1px solid var(--c-border);
}

.notifications-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.notifications-header .section-title {
  margin-bottom: 0;
}

/* Notification list */
.notification-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.notification-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-surface);
  transition: background var(--transition);
}

.notification-item:hover {
  background: var(--c-surface-hover);
}

.notification-item--fired {
  opacity: 0.5;
}

.notification-item__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.notification-item__dot--info {
  background: var(--c-info);
}

.notification-item__dot--warning {
  background: var(--c-warning);
}

.notification-item__dot--urgent {
  background: var(--c-urgent);
}

.notification-item__time {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 0.9rem;
  min-width: 5ch;
}

.notification-item__label {
  flex: 1;
  font-size: 0.9rem;
  color: var(--c-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.notification-item__actions {
  display: flex;
  gap: 0.25rem;
  flex-shrink: 0;
}

.notification-item__actions .btn {
  min-height: 32px;
  min-width: 32px;
  padding: 0.2rem 0.5rem;
  font-size: 0.8rem;
}

/* ---------- Notification form ---------- */
.notification-form {
  padding: 1rem;
  margin-bottom: 0.75rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  background: var(--c-surface);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.notification-form__row {
  display: flex;
  gap: 0.75rem;
}

.notification-form__label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--c-text-muted);
}

.notification-form__label--wide {
  flex: 1;
}

.input {
  height: 40px;
  padding: 0.375rem 0.625rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: var(--c-bg);
  color: var(--c-text);
  font-size: 0.9rem;
  width: 100%;
  transition: border-color var(--transition);
}

.input:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.notification-form__urgency {
  border: none;
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.notification-form__urgency legend {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--c-text-muted);
  margin-right: 0.5rem;
}

.radio-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.9rem;
  cursor: pointer;
  min-height: 44px;
}

.radio-label input[type="radio"] {
  accent-color: var(--c-primary);
}

.notification-form__actions {
  display: flex;
  gap: 0.5rem;
}

/* ---------- Browser notifications ---------- */
.browser-notification-section {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 0;
  border-top: 1px solid var(--c-border);
}

.notification-status {
  font-size: 0.85rem;
  color: var(--c-text-muted);
}

/* ---------- Responsive ---------- */
@media (max-width: 600px) {
  .app {
    padding: 0.75rem;
  }

  .timer-controls {
    gap: 0.5rem;
  }

  .timer-controls .btn {
    flex: 1;
    min-width: 0;
  }

  .preset-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .notification-form__row {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* ---------- Utility ---------- */
[hidden] {
  display: none !important;
}

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