/*
 * Shared styles for Oil Crisis Analyzer
 * Used by all pages: index.html, map.html, global.html, australia.html, price.html, reserves.html
 * Research data: see /research/ folder
 */

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #232736;
  --border: #2e3347;
  --text: #e2e4eb;
  --text-dim: #8b8fa3;
  --accent: #5b8af5;
  --green: #34d399;
  --amber: #fbbf24;
  --red: #f87171;
  --slider-track: #2e3347;
}

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Background tanker game canvas ── */
#tanker-game {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: auto;
  cursor: crosshair;
}

/* ── Navigation bar ── */
nav {
  background: rgba(26, 29, 39, 0.95);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 0;
  height: 48px;
  position: sticky;
  top: 0;
  z-index: 100;
}

nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  padding: 12px 16px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s;
  white-space: nowrap;
}

nav a:hover {
  color: var(--text);
}

nav a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

nav .nav-title {
  font-weight: 700;
  color: var(--text);
  font-size: 0.85rem;
  margin-right: 8px;
  padding: 12px 16px 12px 0;
  border-right: 1px solid var(--border);
}

/* ── Page layout — sits above game canvas ── */
.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 24px 60px;
  position: relative;
  z-index: 10;
  pointer-events: none; /* let clicks pass through to game canvas */
}

/* Re-enable pointer events on interactive page elements */
.page * {
  pointer-events: auto;
}

.page-header {
  margin-bottom: 28px;
}

.page-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.page-header p {
  color: var(--text-dim);
  font-size: 0.85rem;
  max-width: 720px;
}

/* ── Upstream data indicator ── */
.upstream-banner {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 24px;
  font-size: 0.82rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}

.upstream-banner .upstream-value {
  color: var(--accent);
  font-weight: 700;
}

.upstream-banner .upstream-source {
  color: var(--text-dim);
  font-style: italic;
}

/* ── Section cards ── */
section.card {
  background: rgba(26, 29, 39, 0.92);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
  backdrop-filter: blur(4px);
}

section.card h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 18px;
}

/* ── Slider controls ── */
.control {
  margin-bottom: 18px;
}

.control-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 3px;
}

.control-label {
  font-size: 0.84rem;
  color: var(--text);
  font-weight: 500;
}

.control-value {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.control-hint {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-bottom: 5px;
  font-style: italic;
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.slider-bound {
  font-size: 0.7rem;
  color: var(--text-dim);
  min-width: 36px;
  font-variant-numeric: tabular-nums;
}

.slider-bound.right { text-align: right; }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 6px;
  background: var(--slider-track);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent);
  cursor: pointer;
  transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent);
  cursor: pointer;
}

/* ── Output cards ── */
.output {
  background: var(--surface2);
  border-radius: 8px;
  padding: 14px 16px;
  margin-top: 14px;
}

.output-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 6px 0;
}

.output-row + .output-row {
  border-top: 1px solid var(--border);
}

.output-label {
  font-size: 0.82rem;
  color: var(--text-dim);
}

.output-value {
  font-size: 1.05rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ── Severity colors ── */
.severity-green  { color: var(--green); }
.severity-amber  { color: var(--amber); }
.severity-red    { color: var(--red); }

.severity-bg-green  { background: rgba(52, 211, 153, 0.1); border-color: rgba(52, 211, 153, 0.3); }
.severity-bg-amber  { background: rgba(251, 191, 36, 0.1); border-color: rgba(251, 191, 36, 0.3); }
.severity-bg-red    { background: rgba(248, 113, 113, 0.1); border-color: rgba(248, 113, 113, 0.3); }

/* ── Formula display ── */
.formula {
  font-size: 0.78rem;
  color: var(--text-dim);
  background: var(--bg);
  border-radius: 6px;
  padding: 10px 14px;
  margin-top: 12px;
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  line-height: 1.8;
}

/* ── Dashboard summary cards ── */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.summary-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}

.summary-card .label {
  font-size: 0.72rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.summary-card .value {
  font-size: 1.8rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.summary-card .sub {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ── Two-column layout ── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 720px) {
  .two-col { grid-template-columns: 1fr; }
  nav { overflow-x: auto; }
}

/* ── Note / warning box ── */
.note-box {
  background: var(--surface2);
  border-left: 3px solid var(--amber);
  border-radius: 0 8px 8px 0;
  padding: 14px 18px;
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 20px;
}

/* ── Source links ── */
.sources {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.sources h3 {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.sources a {
  font-size: 0.72rem;
  color: var(--accent);
  text-decoration: none;
  opacity: 0.7;
}

.sources a:hover { opacity: 1; text-decoration: underline; }

.source-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
}