:root {
  --bg: #ffffff;
  --border: #d9dde1;
  --text: #14181c;
  --text-muted: #5b6670;
  --accent: #1f6feb;
  --ok: #2ea043;
  --error: #d1242f;
  --warning: #bf8700;
  --surface: #f7f9fa;
}

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

html, body { height: 100%; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
}

header {
  flex-shrink: 0;
  padding: 10px 18px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 18px;
}

h1 { font-size: 1.05rem; font-weight: 600; letter-spacing: -0.01em; }

.subtitle { font-size: 0.78rem; color: var(--text-muted); }

#validity {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok);
  flex-shrink: 0;
}

.status-dot.loading { background: var(--warning); animation: pulse 1.2s ease-in-out infinite; }
.status-dot.error { background: var(--error); }

@keyframes pulse { 50% { opacity: 0.35; } }

.nav-links a {
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
}

.nav-links a:hover { text-decoration: underline; }

#map { flex: 1 1 auto; min-height: 0; background: #dfe8f0; }

footer {
  flex-shrink: 0;
  padding: 6px 18px;
  font-size: 0.7rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  background: var(--surface);
}

footer a { color: var(--accent); }

/*
 * Screenshot mode: the renderer captures #map alone, but hiding the chrome
 * removes any chance of a scrollbar or a reflow shifting the canvas mid-capture.
 */
body.screenshot header,
body.screenshot footer { display: none; }
body.screenshot #map { height: 100vh; }

/* ---- Chart viewer (static.html) ---- */

/*
 * The chart is the page. Header, tabs and footer are fixed-height, and the
 * stage takes whatever is left, so the image is always as large as it can be
 * without the window scrolling.
 */
body.charts { overflow: hidden; }

.tabs {
  flex-shrink: 0;
  display: flex;
  gap: 2px;
  padding: 0 18px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  overflow-x: auto;
}

.tab {
  font: inherit;
  font-size: 0.82rem;
  padding: 9px 16px;
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  white-space: nowrap;
}

.tab:hover { color: var(--text); background: rgba(0, 0, 0, 0.03); }

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

.tab.missing { opacity: 0.45; }

.chart-stage {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  background: var(--surface);
}

/*
 * The link fills the stage and the image fits inside it with object-fit.
 *
 * The obvious `max-height: 100%` on the image alone does not work: it resolves
 * against this anchor, whose own height is auto, so it computes to none and the
 * image renders at its natural size and overflows. Giving the anchor a definite
 * height and letting object-fit do the scaling avoids that entirely, and keeps
 * the aspect ratio for both a tall region (WA) and a wide one (Australia).
 */
.chart-stage a {
  display: block;
  width: 100%;
  height: 100%;
  line-height: 0;
}

/*
 * No border or background here on purpose. The element fills the stage and
 * object-fit letterboxes the chart inside it, so a frame would be drawn around
 * the element rather than around the visible chart, leaving empty panels down
 * either side. The chart's own ocean reads as its edge.
 */
.chart-stage img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.placeholder {
  max-width: 44ch;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

footer .spacer { flex: 1 1 auto; }

footer code {
  font-size: 0.68rem;
  padding: 1px 5px;
  border-radius: 3px;
  background: var(--bg);
  border: 1px solid var(--border);
  user-select: all;
}

.link-button {
  font-size: 0.7rem;
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  cursor: pointer;
}

body.charts footer {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}