/* Anatomy of a Heatwave — dark, map-first layout.
 * Map is full-bleed; timeline docks at the bottom; the detail panel overlays
 * on the right (desktop) or as a bottom sheet (mobile, refined in Phase 4). */

:root {
  color-scheme: dark;
  --bg: #12141c;
  --surface: #1c1f2b;
  --surface-2: #262a3a;
  --text: #f5ede4;
  --muted: #9aa3b2;
  --accent: #ef8a62;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}

#map { position: fixed; inset: 0; }

.load-error { padding: 2rem; color: var(--accent); }

/* ---- header ---------------------------------------------------- */
header {
  position: fixed; top: 0; left: 0; right: 0;
  padding: 0.9rem 1.2rem;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(18,20,28,0.9), transparent);
  z-index: 5;
}
header h1 { margin: 0; font-size: 1.15rem; }
header p { margin: 0.15rem 0 0; font-size: 0.8rem; color: var(--muted); }

/* header has pointer-events:none so the map stays draggable beneath it;
 * the info button opts back in. */
#info-btn {
  pointer-events: auto;
  margin-left: 0.6rem; padding: 0.2rem 0.65rem;
  vertical-align: 2px;
  font-size: 0.72rem; letter-spacing: 0.02em;
  color: var(--text); background: var(--surface-2);
  border: 1px solid #444c63; border-radius: 999px; cursor: pointer;
}
#info-btn:hover { background: #303650; }

/* ---- info modal -------------------------------------------------- */
#info-modal {
  position: fixed; inset: 0; z-index: 30;
  background: rgba(10, 12, 18, 0.7);
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
#info-modal[hidden] { display: none; }
.modal-card {
  position: relative;
  max-width: 44rem; max-height: 86vh; overflow-y: auto;
  background: var(--surface); border: 1px solid #333a4d;
  border-radius: var(--radius); padding: 1.6rem 1.8rem;
  line-height: 1.6; font-size: 0.92rem;
  box-shadow: 0 8px 40px rgba(0,0,0,0.6);
}
.modal-card h2 { margin-top: 0; font-size: 1.2rem; }
.modal-card h3 { font-size: 0.95rem; margin: 1.3rem 0 0.3rem; color: var(--accent); }
.modal-card p { margin: 0.5rem 0; color: #d9d2c7; }
.modal-card a { color: var(--accent); }
.modal-card .modal-foot {
  margin-top: 1.4rem; padding-top: 0.8rem; border-top: 1px solid #333a4d;
  font-size: 0.78rem; color: var(--muted);
}
#info-close {
  position: absolute; top: 0.8rem; right: 0.9rem;
  border: none; background: none; color: var(--muted);
  font-size: 1.15rem; cursor: pointer;
}
#info-close:hover { color: var(--text); }

/* ---- timeline bar ----------------------------------------------- */
#timeline {
  position: fixed; left: 50%; transform: translateX(-50%);
  bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
  width: min(680px, calc(100% - 1.5rem));
  background: var(--surface);
  border: 1px solid #333a4d;
  border-radius: var(--radius);
  padding: 0.7rem 1rem 0.9rem;
  z-index: 10;
  box-shadow: 0 4px 24px rgba(0,0,0,0.5);
}
.timeline-row { display: flex; align-items: center; gap: 0.8rem; }

#play-btn {
  width: 2.2rem; height: 2.2rem; flex: none;
  border-radius: 50%; border: 1px solid #444c63;
  background: var(--surface-2); color: var(--text);
  font-size: 0.9rem; cursor: pointer;
}
#play-btn:hover { background: #303650; }

.slider-wrap { position: relative; flex: 1; }
#date-slider {
  width: 100%; accent-color: var(--accent); cursor: pointer;
  height: 1.4rem; /* generous hit target for touch scrubbing */
  touch-action: none; /* the thumb, not the page, owns horizontal drags */
}

#event-dots { position: absolute; left: 8px; right: 8px; top: -6px; height: 6px; pointer-events: none; }
.event-dot { position: absolute; width: 6px; height: 6px; border-radius: 50%; transform: translateX(-50%); }
.event-dot.has-event { background: var(--accent); }

#date-label {
  min-width: 9.5rem; text-align: right;
  font-variant-numeric: tabular-nums; font-size: 0.9rem;
}

/* Event facts float over the map, clear of the timeline and panel. */
#event-card {
  position: fixed; left: 50%; top: 4.6rem; transform: translateX(-50%);
  z-index: 8; width: min(440px, calc(100% - 1.5rem));
  padding: 0.7rem 1rem;
  background: var(--surface); border: 1px solid #333a4d;
  border-left: 4px solid var(--accent);
  border-radius: var(--radius); font-size: 0.9rem; line-height: 1.45;
  box-shadow: 0 4px 24px rgba(0,0,0,0.5);
}
#event-card .prov { color: var(--muted); font-size: 0.72rem; margin-left: 0.4rem; }
#event-card hr { border: none; border-top: 1px solid #3a4155; margin: 0.4rem 0; }

/* ---- legend ------------------------------------------------------ */
#legend {
  position: fixed; top: 4.2rem; left: 1rem; z-index: 5;
  background: var(--surface); border: 1px solid #333a4d;
  border-radius: var(--radius); padding: 0.55rem 0.8rem;
  font-size: 0.72rem; color: var(--muted);
}
#legend .bar {
  width: 150px; height: 10px; border-radius: 5px; margin: 0.3rem 0;
  background: linear-gradient(to right,
    #2166ac 0%, #67a9cf 12%, #f7f7f7 20%,
    #fddbc7 36%, #ef8a62 52%, #d6604d 68%, #b2182b 84%, #67001f 100%);
}
#legend .ticks { display: flex; justify-content: space-between; }

/* ---- detail panel ------------------------------------------------ */
#panel {
  position: fixed; top: 4.2rem; right: 1rem; z-index: 10;
  width: min(340px, calc(100% - 2rem));
  max-height: calc(100vh - 12rem); overflow-y: auto;
  background: var(--surface); border: 1px solid #333a4d;
  border-radius: var(--radius); padding: 1rem;
  box-shadow: 0 4px 24px rgba(0,0,0,0.5);
}
#panel h2 { margin: 0 1.5rem 0.4rem 0; font-size: 1rem; }
#panel-close {
  position: absolute; top: 0.6rem; right: 0.6rem;
  border: none; background: none; color: var(--muted);
  font-size: 1.1rem; cursor: pointer;
}
#panel-stats { font-size: 0.8rem; color: var(--muted); line-height: 1.5; }
#panel-stats .big { color: var(--accent); font-size: 1.3rem; font-weight: 700; }
#panel h3 { font-size: 0.8rem; margin: 1rem 0 0.3rem; color: var(--muted); }
#panel canvas { width: 100%; height: 110px; }
#tropical-count { font-size: 0.75rem; color: var(--muted); margin: 0.2rem 0 0; }

/* ---- footer credits ---------------------------------------------- */
footer {
  position: fixed; right: 0.6rem; bottom: 0.2rem; z-index: 4;
  font-size: 0.62rem; color: var(--muted); text-align: right;
}
footer a { color: var(--muted); }

/* ---- touch devices ------------------------------------------------ */
@media (pointer: coarse) {
  #play-btn { width: 2.8rem; height: 2.8rem; font-size: 1.05rem; }
  #panel-close, #info-close { padding: 0.5rem; } /* ≥44px effective target */
}

/* ---- mobile: panel becomes a bottom sheet ------------------------- */
@media (max-width: 640px) {
  #legend { display: none; }
  header h1 { font-size: 1rem; }
  #info-btn { display: block; margin: 0.35rem 0 0; }

  #panel {
    top: auto; left: 0; right: 0; bottom: 0; width: auto;
    max-height: 58vh;
    border-radius: var(--radius) var(--radius) 0 0;
    border-bottom: none;
    padding-bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
    z-index: 20; /* sheet slides over the timeline while open */
    box-shadow: 0 -6px 30px rgba(0,0,0,0.6);
  }
  /* drag-handle affordance */
  #panel::before {
    content: ""; display: block; width: 2.4rem; height: 4px;
    margin: -0.35rem auto 0.6rem; border-radius: 2px; background: #444c63;
  }

  #event-card { top: auto; bottom: 8.6rem; font-size: 0.82rem; }
  #timeline { padding: 0.55rem 0.8rem 0.7rem; }
  #date-label { min-width: 6.5rem; font-size: 0.78rem; }
  .modal-card { padding: 1.1rem 1rem; max-height: 92vh; font-size: 0.88rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}