/* AtlasPI Timeline — v6.17 */
/* Dark theme matching AtlasPI (#0d1117, #161b22, #58a6ff accent) */

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

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  --border: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --accent: #58a6ff;
  --accent-dim: rgba(88,166,255,.15);
  --red: #f85149;
  --orange: #d29922;
  --green: #3fb950;
  --purple: #bc8cff;
  --pink: #f778ba;
  --cyan: #76e3ea;
  --yellow: #e3b341;

  /* Entity type colors */
  --clr-empire: #f85149;
  --clr-kingdom: #58a6ff;
  --clr-republic: #3fb950;
  --clr-dynasty: #bc8cff;
  --clr-caliphate: #d29922;
  --clr-sultanate: #e3b341;
  --clr-confederation: #76e3ea;
  --clr-city_state: #f778ba;
  --clr-colonial: #ff7b72;
  --clr-other: #8b949e;

  --header-h: 56px;
  --controls-h: 52px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

html, body {
  height: 100%;
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ── HEADER ─────────────────────────────────────── */

.tl-header {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  gap: 12px;
  flex-shrink: 0;
  z-index: 100;
}

.tl-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.tl-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  white-space: nowrap;
}
.tl-logo strong { color: var(--accent); }

.tl-title {
  font-size: 14px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.tl-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.tl-nav-link {
  font-size: 12px;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  transition: color .15s, border-color .15s;
}
.tl-nav-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ── CONTROLS BAR ──────────────────────────────── */

.tl-controls {
  height: var(--controls-h);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

.tl-btn-group {
  display: flex;
  gap: 2px;
}

.tl-btn {
  font-family: var(--font);
  font-size: 12px;
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: color .12s, background .12s, border-color .12s;
}
.tl-btn:hover { color: var(--text-primary); border-color: var(--text-muted); }
.tl-btn.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}

.tl-separator {
  width: 1px;
  height: 24px;
  background: var(--border);
  flex-shrink: 0;
}

/* Layer toggles */
.tl-check {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
}
.tl-check input { accent-color: var(--accent); width: 14px; height: 14px; }

/* Search */
.tl-search {
  position: relative;
  flex-shrink: 1;
  min-width: 0;
}
.tl-search input {
  width: 180px;
  font-family: var(--font);
  font-size: 12px;
  padding: 5px 10px 5px 28px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-primary);
  color: var(--text-primary);
  outline: none;
  transition: border-color .15s;
}
.tl-search input:focus { border-color: var(--accent); }
.tl-search input::placeholder { color: var(--text-muted); }
.tl-search-icon {
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 13px;
  pointer-events: none;
}

/* Zoom slider */
.tl-zoom-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--text-muted);
}
.tl-zoom-wrap input[type=range] {
  width: 80px;
  accent-color: var(--accent);
}

/* ── MAIN TIMELINE AREA ────────────────────────── */

.tl-main {
  flex: 1;
  position: relative;
  overflow: hidden;
  cursor: grab;
}
.tl-main.grabbing { cursor: grabbing; }

.tl-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* ── TOOLTIP ───────────────────────────────────── */

.tl-tooltip {
  position: fixed;
  pointer-events: none;
  z-index: 200;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 14px;
  max-width: 320px;
  font-size: 13px;
  line-height: 1.45;
  color: var(--text-primary);
  box-shadow: 0 8px 24px rgba(0,0,0,.4);
  opacity: 0;
  transition: opacity .12s;
}
.tl-tooltip.visible { opacity: 1; }
.tl-tooltip-title {
  font-weight: 600;
  margin-bottom: 4px;
}
.tl-tooltip-meta {
  font-size: 11px;
  color: var(--text-secondary);
}
.tl-tooltip-type {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: .3px;
  margin-left: 6px;
}

/* ── STATUS BAR ────────────────────────────────── */

.tl-status {
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* ── LEGEND ────────────────────────────────────── */

.tl-legend {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}
.tl-legend-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--text-muted);
}
.tl-legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  flex-shrink: 0;
}

/* ── LOADING OVERLAY ───────────────────────────── */

.tl-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  z-index: 300;
  transition: opacity .3s;
}
.tl-loading.hidden { opacity: 0; pointer-events: none; }

.tl-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: tl-spin .8s linear infinite;
}
@keyframes tl-spin { to { transform: rotate(360deg); } }

.tl-loading-text {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-secondary);
}

/* ── LAYOUT ────────────────────────────────────── */

.tl-app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
}

/* ── RESPONSIVE ────────────────────────────────── */

@media (max-width: 640px) {
  .tl-header { padding: 0 10px; }
  .tl-title { display: none; }
  .tl-controls { padding: 0 8px; gap: 6px; }
  .tl-search input { width: 120px; }
  .tl-zoom-wrap input[type=range] { width: 50px; }
  .tl-legend { display: none; }
}