/* ============================================================
   style.css — time.lechu.dev
   Retro neon dark theme, BEM-inspired, CSS custom properties
   ============================================================ */

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
ul { list-style: none; }
button { cursor: pointer; font: inherit; }
input { font: inherit; }
svg { display: block; }

/* ── Design tokens — dark (default) ────────────────────────── */
:root,
[data-theme="dark"] {
  /* Background layers */
  --color-bg:           #0a0a0f;
  --color-bg-surface:   #0f0f1a;
  --color-bg-elevated:  #14142a;
  --color-bg-hover:     #1a1a35;

  /* Neon accent palette */
  --color-neon-green:   #00ff9f;
  --color-neon-cyan:    #00e5ff;
  --color-neon-pink:    #ff00aa;
  --color-neon-yellow:  #ffe600;
  --color-neon-purple:  #bf00ff;

  /* Primary accent */
  --color-accent:       var(--color-neon-green);
  --color-accent-dim:   #00cc7f;
  --color-accent-glow:  0 0 8px #00ff9f88, 0 0 20px #00ff9f44;

  /* Text */
  --color-text-primary:   #e0ffe8;
  --color-text-secondary: #7aff9f;
  --color-text-muted:     #5a9a6a;
  --color-text-dim:       #2e5c3a;

  /* Borders */
  --color-border:       #00ff9f33;
  --color-border-focus: var(--color-neon-cyan);

  /* Column accent cycling */
  --col-accent-0: var(--color-neon-green);
  --col-accent-1: var(--color-neon-cyan);
  --col-accent-2: var(--color-neon-pink);
  --col-accent-3: var(--color-neon-yellow);
  --col-accent-4: var(--color-neon-purple);

  /* Hour highlight */
  --color-hour-current: #00ff9f22;
  --color-hour-border:  #00ff9f55;

  /* Scrollbar */
  --color-scrollbar-track: #0f0f1a;
  --color-scrollbar-thumb: #00ff9f44;

  /* Shadows */
  --shadow-card: 0 0 0 1px var(--color-border), 0 0 20px #00ff9f11;
  --shadow-card-hover: 0 0 0 1px var(--color-accent), 0 0 30px #00ff9f22;

  /* Typography */
  --font-mono: 'Courier New', Courier, 'Lucida Console', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  /* Spacing */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  40px;

  /* Sizing */
  --col-min-width: 200px;
  --col-max-width: 260px;
  --header-height: 80px;
  --radius-sm: 2px;
  --radius-md: 4px;

  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-med:  220ms ease;
}

/* ── Design tokens — light ──────────────────────────────────── */
[data-theme="light"] {
  --color-bg:           #f0f4f0;
  --color-bg-surface:   #e8ede8;
  --color-bg-elevated:  #dde5dd;
  --color-bg-hover:     #d0dbd0;

  --color-neon-green:   #007a40;
  --color-neon-cyan:    #006080;
  --color-neon-pink:    #990055;
  --color-neon-yellow:  #806600;
  --color-neon-purple:  #5500aa;

  --color-accent:       #007a40;
  --color-accent-dim:   #005c30;
  --color-accent-glow:  0 0 4px #007a4044;

  --color-text-primary:   #0a1a0f;
  --color-text-secondary: #1a4a28;
  --color-text-muted:     #4a7a5a;
  --color-text-dim:       #8aaa9a;

  --color-border:       #007a4033;
  --color-border-focus: #006080;

  --col-accent-0: #007a40;
  --col-accent-1: #006080;
  --col-accent-2: #990055;
  --col-accent-3: #806600;
  --col-accent-4: #5500aa;

  --color-hour-current: #007a4018;
  --color-hour-border:  #007a4044;

  --color-scrollbar-track: #e8ede8;
  --color-scrollbar-thumb: #007a4066;

  --shadow-card: 0 0 0 1px var(--color-border), 0 2px 8px #00000011;
  --shadow-card-hover: 0 0 0 1px var(--color-accent), 0 4px 16px #00000022;
}

/* ── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--color-scrollbar-track); }
::-webkit-scrollbar-thumb { background: var(--color-scrollbar-thumb); border-radius: 3px; }

/* ── Base ───────────────────────────────────────────────────── */
html {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--color-bg);
  color: var(--color-text-primary);
  min-height: 100vh;
  scroll-behavior: smooth;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--color-bg);
  /* Subtle scanline texture */
  background-image: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 255, 159, 0.015) 2px,
    rgba(0, 255, 159, 0.015) 4px
  );
}

/* ── Utility ────────────────────────────────────────────────── */
.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;
}

/* ── Header ─────────────────────────────────────────────────── */
.site-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-surface);
  flex-shrink: 0;
}

.site-header__ascii {
  overflow-x: auto;
  overflow-y: hidden;
  flex: 1;
  min-width: 0;
}

.site-header__ascii pre {
  font-family: var(--font-mono);
  font-size: 8px;
  line-height: 1.15;
  color: var(--color-accent);
  text-shadow: var(--color-accent-glow);
  white-space: pre;
  user-select: none;
  letter-spacing: 0;
}

.site-header__controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
  padding-top: var(--space-xs);
}

/* ── Local clock widget ─────────────────────────────────────── */
.local-clock {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1px;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  line-height: 1.2;
}

.local-clock__tz {
  font-size: 9px;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.local-clock__time {
  font-size: 18px;
  font-weight: bold;
  color: var(--color-accent);
  text-shadow: var(--color-accent-glow);
  letter-spacing: 0.04em;
}

.local-clock__date {
  font-size: 9px;
  color: var(--color-text-secondary);
  letter-spacing: 0.03em;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.btn:hover,
.btn:focus-visible {
  border-color: var(--color-accent);
  box-shadow: var(--color-accent-glow);
  outline: none;
}

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

.btn--primary {
  border-color: var(--color-accent);
  color: var(--color-accent);
  font-weight: bold;
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--color-accent);
  color: var(--color-bg);
  box-shadow: var(--color-accent-glow);
}

.btn--icon {
  padding: var(--space-xs);
  width: 52px;
  height: 52px;
  justify-content: center;
}

.btn--icon .icon {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Theme toggle icon visibility */
[data-theme="dark"] .icon--moon { display: none; }
[data-theme="dark"] .icon--sun  { display: block; }
[data-theme="light"] .icon--sun  { display: none; }
[data-theme="light"] .icon--moon { display: block; }

.format-label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: bold;
  letter-spacing: 0.05em;
}

/* ── Toolbar / Search ───────────────────────────────────────── */
.toolbar {
  position: relative;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-surface);
}

.search-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  max-width: 600px;
}

.search-wrapper__prefix {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 14px;
  text-shadow: var(--color-accent-glow);
  flex-shrink: 0;
  user-select: none;
}

.search-input {
  flex: 1;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-family: var(--font-mono);
  font-size: 13px;
  caret-color: var(--color-accent);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-input::placeholder {
  color: var(--color-text-muted);
}

.search-input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 2px var(--color-border-focus)44;
}

/* ── Autocomplete suggestions ───────────────────────────────── */
.suggestions {
  position: absolute;
  top: calc(100% - 1px);
  left: var(--space-lg);
  right: var(--space-lg);
  max-width: 600px;
  max-height: 280px;
  overflow-y: auto;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-accent);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  box-shadow: 0 8px 24px #00000066, var(--color-accent-glow);
  z-index: 100;
}

.suggestions[hidden] { display: none; }

.suggestions__item {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  border-bottom: 1px solid var(--color-border);
}

.suggestions__item:last-child { border-bottom: none; }

.suggestions__item:hover,
.suggestions__item[aria-selected="true"] {
  background: var(--color-bg-hover);
  color: var(--color-accent);
}

.suggestions__item:hover .suggestions__tz,
.suggestions__item[aria-selected="true"] .suggestions__tz {
  color: var(--color-accent);
  text-shadow: var(--color-accent-glow);
}

.suggestions__city {
  font-size: 13px;
  color: var(--color-text-primary);
  flex: 1;
}

.suggestions__tz {
  font-size: 11px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.suggestions__offset {
  font-size: 11px;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  flex-shrink: 0;
}

/* ── Main content ───────────────────────────────────────────── */
.site-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Timezone grid ──────────────────────────────────────────── */
.grid-section {
  flex: 1;
  overflow-x: auto;
  overflow-y: hidden;
  padding: var(--space-lg);
}

.tz-grid {
  display: flex;
  gap: var(--space-md);
  min-height: 520px;
  align-items: stretch;
}

.grid-empty {
  text-align: center;
  padding: var(--space-xl);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  line-height: 2;
}

/* ── Timezone column ────────────────────────────────────────── */
.tz-col {
  display: flex;
  flex-direction: column;
  min-width: var(--col-min-width);
  max-width: var(--col-max-width);
  flex: 0 0 var(--col-min-width);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-med);
  overflow: hidden;
}

.tz-col:hover {
  box-shadow: var(--shadow-card-hover);
}

/* Per-column accent color cycling */
.tz-col:nth-child(5n+1) { --col-accent: var(--col-accent-0); }
.tz-col:nth-child(5n+2) { --col-accent: var(--col-accent-1); }
.tz-col:nth-child(5n+3) { --col-accent: var(--col-accent-2); }
.tz-col:nth-child(5n+4) { --col-accent: var(--col-accent-3); }
.tz-col:nth-child(5n+5) { --col-accent: var(--col-accent-4); }

.tz-col__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  border-bottom: 2px solid var(--col-accent, var(--color-accent));
  background: var(--color-bg-elevated);
  gap: var(--space-xs);
}

.tz-col__city {
  font-size: 13px;
  font-weight: bold;
  color: var(--col-accent, var(--color-accent));
  text-shadow: 0 0 8px var(--col-accent, var(--color-accent));
  text-transform: uppercase;
  letter-spacing: 0.06em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.tz-col__tz-id {
  font-size: 9px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  margin-top: 2px;
}

.tz-col__remove {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1;
  transition: color var(--transition-fast), border-color var(--transition-fast);
  cursor: pointer;
  font-family: var(--font-mono);
}

.tz-col__remove:hover,
.tz-col__remove:focus-visible {
  color: var(--color-neon-pink);
  border-color: var(--color-neon-pink);
  outline: none;
}

.tz-col__clock {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.tz-col__time {
  font-size: 28px;
  font-weight: bold;
  font-family: var(--font-mono);
  color: var(--col-accent, var(--color-accent));
  text-shadow: 0 0 12px var(--col-accent, var(--color-accent));
  letter-spacing: 0.04em;
  line-height: 1;
  display: block;
}

.tz-col__seconds {
  font-size: 16px;
  opacity: 0.7;
}

.tz-col__ampm {
  font-size: 12px;
  margin-left: 4px;
  opacity: 0.8;
}

.tz-col__date {
  font-size: 11px;
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
  letter-spacing: 0.04em;
}

.tz-col__offset {
  font-size: 10px;
  color: var(--color-text-muted);
  margin-top: 2px;
  letter-spacing: 0.04em;
}

/* ── Hour list inside column ────────────────────────────────── */
.tz-col__hours {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-xs) 0;
}

.tz-col__hour-row {
  display: flex;
  align-items: center;
  padding: 2px var(--space-md);
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  border-left: 2px solid transparent;
  transition: background var(--transition-fast), color var(--transition-fast);
  gap: var(--space-sm);
}

.tz-col__hour-row--current {
  background: var(--color-hour-current);
  border-left-color: var(--col-accent, var(--color-accent));
  color: var(--col-accent, var(--color-accent));
  text-shadow: 0 0 6px var(--col-accent, var(--color-accent));
}

.tz-col__hour-label {
  width: 40px;
  flex-shrink: 0;
}

.tz-col__hour-bar-fill {
  flex: 1;
  height: 2px;
  background: var(--color-border);
  border-radius: 1px;
  overflow: hidden;
}

.tz-col__hour-row--current .tz-col__hour-bar-fill {
  background: var(--col-accent, var(--color-accent));
  box-shadow: 0 0 4px var(--col-accent, var(--color-accent));
}

/* ── Hour reference bar (bottom) ────────────────────────────── */
.hour-bar-section {
  padding: var(--space-sm) var(--space-lg);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-surface);
  overflow-x: auto;
}

.hour-bar {
  display: flex;
  gap: 0;
  min-width: max-content;
}

.hour-bar__cell {
  flex: 1;
  min-width: 28px;
  text-align: center;
  font-size: 9px;
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  padding: 2px 0;
  border-left: 1px solid var(--color-border);
  letter-spacing: 0;
}

.hour-bar__cell--current {
  color: var(--color-accent);
  text-shadow: var(--color-accent-glow);
  background: var(--color-hour-current);
}

/* ── CLI section ─────────────────────────────────────────────── */
.cli-section {
  padding: var(--space-sm) var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.cli-details__summary {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
  cursor: pointer;
  letter-spacing: 0.05em;
  list-style: none;
  user-select: none;
}

.cli-details__summary::before {
  content: '▶ ';
  color: var(--color-accent);
}

.cli-details[open] .cli-details__summary::before {
  content: '▼ ';
}

.cli-details__body {
  margin-top: var(--space-sm);
}

.cli-example {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-sm) var(--space-md);
  overflow-x: auto;
  line-height: 1.7;
}

.cli-example code {
  color: var(--color-accent);
}

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  padding: var(--space-sm) var(--space-lg);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-surface);
  font-size: 10px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  text-align: center;
  flex-shrink: 0;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 600px) {
  .site-header__ascii pre {
    font-size: 6px;
    line-height: 1.2;
  }

  .site-header {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .site-header__controls {
    align-self: flex-end;
  }

  .grid-section {
    padding: var(--space-sm);
  }

  .tz-col {
    min-width: 160px;
    flex-basis: 160px;
  }

  .tz-col__time {
    font-size: 22px;
  }
}

/* ── Animations ─────────────────────────────────────────────── */
@keyframes neon-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.7; }
}

.tz-col__time {
  animation: neon-pulse 3s ease-in-out infinite;
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  .tz-col__time { animation: none; }
  * { transition-duration: 0ms; }
}

/* ── Crosshair hover ────────────────────────────────────────── */

/* Highlight on the hovered hour row across all columns */
.tz-col__hour-row--hover {
  background: var(--color-bg-hover);
  border-left-color: var(--color-neon-cyan);
  color: var(--color-neon-cyan);
}

/* When crosshair is active, dim the current-hour highlight slightly
   so the hover row stands out clearly */
.tz-grid--crosshair .tz-col__hour-row--current:not(.tz-col__hour-row--hover) {
  opacity: 0.45;
}

/* Cursor crosshair on the hours list */
.tz-col__hours:hover {
  cursor: crosshair;
}

/* ── Crosshair tooltip ──────────────────────────────────────── */
.crosshair-tooltip {
  position: fixed;
  z-index: 200;
  pointer-events: none;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-neon-cyan);
  border-radius: var(--radius-md);
  box-shadow: 0 0 0 1px var(--color-neon-cyan)44,
              0 8px 32px #00000088,
              0 0 20px var(--color-neon-cyan)22;
  padding: var(--space-sm) var(--space-md);
  min-width: 180px;
  max-width: 320px;
}

.crosshair-tooltip[hidden] { display: none; }

.crosshair-tooltip__header {
  font-size: 10px;
  color: var(--color-neon-cyan);
  text-shadow: 0 0 6px var(--color-neon-cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-xs);
}

.crosshair-tooltip__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
  padding: 2px 0;
}

.crosshair-tooltip__city {
  font-size: 11px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  flex-shrink: 0;
  min-width: 80px;
}

.crosshair-tooltip__time {
  font-size: 13px;
  font-weight: bold;
  color: var(--color-text-primary);
  font-family: var(--font-mono);
  text-align: right;
}

.crosshair-tooltip__date {
  font-size: 9px;
  color: var(--color-text-muted);
  text-align: right;
  letter-spacing: 0.03em;
}