/* ═══════════════════════════════════════════════════════════════════════════
   Grid Poet — shared stylesheet
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── 1. Custom properties ── */
:root {
  --bg:            #0d0d0d;
  --bg-subtle:     #111;
  --bg-card:       #141414;
  --border:        #1e1e1e;
  --border-strong: #222;
  --border-faint:  #1a1a1a;
  --text:          #e0e0e0;
  --text-mid:      #c0c0c0;
  --text-muted:    #888;
  --text-dim:      #777;
  --text-dimmer:   #666;
  --text-link:     #999;
  --text-link-hover:#bbb;
  --white:         #fff;
  --green:         #6dbf7e;
  --amber:         #c8a84b;
  --red:           #c86060;
  --blue:          #4a9ede;
  --blue-dark:     #2d7ab5;
  --orange:        #c47c3e;
  --coal:          #666;
  --lignite:       #4a3a2a;
  --solar:         #e8c84a;
  --biomass:       #7db87d;
  --hydro:         #5ab4c4;
  --import-color:  #9ecbe8;
  --export-color:  #7db87d;
  --zone-de:       #e8c84a;
  --zone-fr:       #4a9ede;
  --zone-nl:       #f28c28;
  --zone-at:       #c86060;
  --zone-pl:       #c0c0c0;
  --zone-dk1:      #c47c3e;
  --zone-be:       #9ecbe8;
  --zone-cz:       #6dbf7e;
  --zone-es:       #e07040;
  --zone-pt:       #50a060;
  --zone-gb:       #7070c0;
  --font-serif:    Georgia, serif;
  --font-sans:     system-ui, sans-serif;
  --grid-color:    #161616;
  --axis-color:    #333;
  --tooltip-border:#2a2a2a;
}

/* ── 2. Reset + body ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* Legend toggle button (shared across markets + forecast) */
.legend-toggle { background: none; border: 1px solid var(--border); color: var(--red); padding: 0.15rem 0.5rem; font: 0.65rem var(--font-sans); cursor: pointer; margin-left: 0.5rem; text-transform: lowercase; letter-spacing: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-serif);
  line-height: 1.6;
}

/*
  Typography system:
  - Serif (Georgia): body prose, poems, analysis text, explainers
  - Sans (system-ui): headings, nav, labels, stats, charts, UI controls, metadata
  - Mono (Courier New): ASCII art, code snippets
*/
h1, h2, h3, h4, h5, h6 { font-family: var(--font-sans); }

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

/* ── 3. Navigation ── */
.site-nav {
  display: flex;
  align-items: center;
  padding: 0.85rem 2rem;
  border-bottom: 1px solid var(--border-strong);
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
}
.nav-logo {
  font-size: 1.1rem;
  font-weight: normal;
  letter-spacing: 0.1em;
  color: var(--white);
  text-decoration: none;
  margin-right: auto;
}
.nav-logo:hover { color: #ccc; }

.nav-links {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}
.nav-links a {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-link);
  text-decoration: none;
  padding: 0.3rem 0.75rem;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover {
  color: #bbb;
  background: rgba(255,255,255,0.04);
}
.nav-links a.active {
  color: #ccc;
  background: rgba(255,255,255,0.06);
}
/* Art link — glitch effect with background flicker */
.nav-links a.nav-art {
  color: #d4609a;
  font-weight: 600;
  letter-spacing: 0.04em;
  animation: art-glitch 3.5s infinite, art-bg-glitch 3.5s infinite;
  position: relative;
}
@keyframes art-glitch {
  0%, 82%, 100% { text-shadow: none; color: #d4609a; transform: none; }
  83% { text-shadow: -3px 0 #4a9ede, 3px 0 #e8c84a; color: #e87ab5; transform: skewX(-3deg); }
  84% { text-shadow: 2px 1px #c86060, -2px -1px #6dbf7e; color: #ff6eb4; transform: skewX(2deg) translateX(1px); }
  85% { text-shadow: none; color: #4a9ede; transform: skewX(-1deg) translateX(-1px); }
  86% { text-shadow: -2px 2px #e8c84a, 2px -1px #c86060; color: #d4609a; transform: translateY(-1px); }
  87% { text-shadow: 4px 0 #6dbf7e, -1px 0 #e87ab5; color: #ff6eb4; transform: none; }
  88% { text-shadow: none; color: #e87ab5; transform: skewX(1deg); }
  89% { text-shadow: -1px 0 #4a9ede; color: #d4609a; transform: none; }
}
@keyframes art-bg-glitch {
  0%, 82%, 89%, 100% { background: transparent; border-radius: 4px; box-shadow: none; }
  83% { background: rgba(212, 96, 154, 0.15); border-radius: 12px 4px 12px 4px; box-shadow: 0 0 6px rgba(212, 96, 154, 0.3); }
  84% { background: rgba(74, 158, 222, 0.12); border-radius: 4px 12px 4px 12px; box-shadow: -2px 0 8px rgba(74, 158, 222, 0.2); }
  85% { background: rgba(232, 200, 74, 0.1); border-radius: 8px; box-shadow: 2px 0 4px rgba(232, 200, 74, 0.2); }
  86% { background: rgba(200, 96, 96, 0.12); border-radius: 4px 8px 12px 4px; box-shadow: 0 0 10px rgba(200, 96, 96, 0.15); }
  87% { background: rgba(212, 96, 154, 0.2); border-radius: 14px 4px 4px 14px; box-shadow: 0 0 12px rgba(212, 96, 154, 0.25); }
  88% { background: transparent; border-radius: 4px; box-shadow: none; }
}
.nav-links a.nav-art:hover {
  color: #e87ab5;
  background: rgba(212, 96, 154, 0.12);
  box-shadow: 0 0 8px rgba(212, 96, 154, 0.2);
  animation: none;
}
.nav-links a.nav-art.active {
  color: #e87ab5;
  background: rgba(212, 96, 154, 0.15);
  box-shadow: 0 0 6px rgba(212, 96, 154, 0.15);
}

/* Markets link — blue */
.nav-links a.nav-markets { color: var(--zone-fr); }
.nav-links a.nav-markets:hover { color: #6ab4f0; background: rgba(74, 158, 222, 0.08); }
.nav-links a.nav-markets.active { color: #6ab4f0; background: rgba(74, 158, 222, 0.12); }

/* Forecast link — green */
.nav-links a.nav-forecast { color: var(--green); }
.nav-links a.nav-forecast:hover { color: #8dd49b; background: rgba(109, 191, 126, 0.08); }
.nav-links a.nav-forecast.active { color: #8dd49b; background: rgba(109, 191, 126, 0.12); }

/* Analytics link — amber */
.nav-links a.nav-analytics { color: var(--amber); }
.nav-links a.nav-analytics:hover { color: #ddc06a; background: rgba(200, 168, 75, 0.08); }
.nav-links a.nav-analytics.active { color: #ddc06a; background: rgba(200, 168, 75, 0.12); }

/* Mobile menu button — hidden on desktop */
.nav-toggle {
  display: none;
  background: linear-gradient(135deg, rgba(212,96,154,0.15), rgba(200,168,75,0.15));
  border: 1px solid rgba(212,96,154,0.4);
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  color: #d4609a;
  letter-spacing: 0.06em;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
  gap: 0.3rem;
}
.nav-toggle:hover {
  border-color: rgba(212,96,154,0.7);
  color: #e87ab5;
  background: linear-gradient(135deg, rgba(212,96,154,0.22), rgba(200,168,75,0.22));
}
/* Hide the burger bars — we use text content instead */
.nav-toggle span {
  display: none;
}

/* ── 4. Footer ── */
.site-footer {
  margin-top: 4rem;
  padding: 2rem;
  border-top: 1px solid var(--border-faint);
  text-align: center;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--text-dimmer);
}
.site-footer a {
  color: var(--text-dim);
  text-decoration: none;
}
.site-footer a:hover { color: var(--text-muted); }
.footer-attr { margin-bottom: 0.5rem; }
.footer-nav a { margin: 0 0.3rem; }

/* ── 5. Shared components ── */

/* Section headings */
.section-heading {
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.7rem;
  font-family: var(--font-sans);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.model-tag {
  font-size: 0.65rem;
  letter-spacing: 0.03em;
  text-transform: none;
  font-weight: 400;
  color: var(--text-dim);
  border: 1px solid #333;
  border-radius: 999px;
  padding: 0.1rem 0.45rem;
  font-family: var(--font-sans);
}

/* Stat cards */
.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  margin-bottom: 1rem;
}
.stat { flex: 1 1 140px; }
.stat-value { font-size: 1.75rem; color: var(--white); }
.stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 0.15rem;
}
.stat-note {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.2rem;
  font-family: var(--font-sans);
}
.stat-value.green   { color: var(--green); }
.stat-value.amber   { color: var(--amber); }
.stat-value.import  { color: var(--import-color); }
.stat-value.export  { color: var(--export-color); }
.stat-value.high-ci { color: var(--red); }

/* Generation mix bar */
.mix-section {
  margin-bottom: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}
.mix-bar {
  display: flex;
  height: 12px;
  border-radius: 6px;
  overflow: hidden;
  gap: 1px;
}
.mix-segment {
  height: 100%;
  width: 0;
  transition: width 0.7s ease, opacity 0.2s;
}
.mix-segment:hover { opacity: 0.75; }
.mix-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  margin-top: 0.6rem;
}
.mix-legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  color: #999;
}
.mix-swatch {
  width: 10px; height: 10px;
  border-radius: 2px; flex-shrink: 0;
}

/* Chart sections */
.chart-section { margin-bottom: 2.5rem; }
.chart-wrap {
  position: relative;
  height: 240px;
  margin-top: 0.5rem;
}
.chart-explainer {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.5;
}
.chart-explainer strong { color: #999; font-weight: normal; }

/* Summary cards (forecast, etc.) */
.summary-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}
.summary-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.2rem;
}
.summary-card .label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--text-link);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.summary-card .value {
  font-size: 1.6rem;
  color: var(--white);
  margin-top: 0.25rem;
}
.summary-card .unit {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* Data tables */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  margin-top: 0.5rem;
}
.data-table th {
  text-align: left;
  color: var(--text-link);
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border-strong);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
}
.data-table td {
  padding: 0.45rem 0.75rem;
  border-bottom: 1px solid #151515;
  color: #bbb;
}
.data-table td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--white);
}
.data-table tr:hover td { background: var(--bg-card); }

/* Doc-specific tables */
.doc-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  margin: 1rem 0;
}
.doc-table th {
  text-align: left;
  color: var(--text-muted);
  font-weight: 600;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid #333;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.doc-table td {
  padding: 0.4rem 0.75rem;
  border-bottom: 1px solid var(--border-faint);
  color: #bbb;
}
.doc-table tr:hover td { background: var(--grid-color); }

/* Note boxes and code */
.note-box {
  background: var(--bg-card);
  border-left: 3px solid var(--amber);
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  font-size: 0.9rem;
  color: #aaa;
}
.code-inline {
  background: var(--border-faint);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-family: 'Courier New', monospace;
  font-size: 0.85rem;
  color: var(--amber);
}

/* Content container */
.content-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem 2.5rem 4rem;
}

/* Text content */
.latest-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 1.5rem;
}
.analysis {
  font-size: 1.1rem;
  color: var(--text-mid);
  line-height: 1.85;
}
.poem {
  font-style: italic;
  font-size: 1.2rem;
  color: #d8d8d8;
  line-height: 1.9;
  border-left: 2px solid #3a2e1e;
  padding-left: 1.25rem;
}

/* ── 6. Record badges (gallery/archive thumbnails) ── */
.record-badge {
  position: absolute;
  bottom: 0.4rem; left: 0.4rem;
  display: flex;
  gap: 2px;
  z-index: 2;
}
.record-pip {
  width: 22px; height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,0.15);
}
.record-pip.gold   { background: rgba(200, 168, 75, 0.88); }
.record-pip.silver { background: rgba(153, 153, 153, 0.88); }
.record-pip.bronze { background: rgba(139, 94, 60, 0.88); }
.record-pip svg {
  width: 13px; height: 13px;
  fill: var(--white);
  color: var(--white);
}

/* ── 7. Records page ── */
.records-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 2rem 4rem;
}
.records-intro {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  line-height: 1.6;
}
.records-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}
.record-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
}
.record-card-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.record-card-icon {
  width: 28px; height: 28px;
  color: var(--amber);
}
.record-card-title {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  letter-spacing: 0.02em;
}
.record-card-desc {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.1rem;
}

/* Individual record entry within a card */
.record-entry {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
  text-decoration: none;
  color: inherit;
  transition: background 0.15s;
  border-radius: 4px;
  margin: 0 -0.4rem;
  padding-left: 0.4rem;
  padding-right: 0.4rem;
}
.record-entry:hover { background: rgba(255,255,255,0.03); }
.record-entry + .record-entry {
  border-top: 1px solid var(--border);
}
.record-rank {
  width: 24px; height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  flex-shrink: 0;
}
.record-rank.gold   { background: #c8a84b; color: #1a1a1a; }
.record-rank.silver { background: #999;    color: #1a1a1a; }
.record-rank.bronze { background: #8b5e3c; color: #fff; }

.record-thumb {
  width: 56px; height: 40px;
  border-radius: 3px;
  object-fit: cover;
  flex-shrink: 0;
  opacity: 0.85;
}
.record-entry:hover .record-thumb { opacity: 1; }

.record-info { flex: 1; min-width: 0; }
.record-value {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--white);
  font-weight: 600;
}
.record-when {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.record-empty {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--text-dim);
  padding: 0.5rem 0;
}

/* ── 8. Responsive breakpoints ── */
@media (max-width: 900px) {
  .latest-meta { grid-template-columns: 1fr; }
}

/* Scroll-to-top button */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, background 0.2s;
  z-index: 49;
}
.scroll-top.visible { opacity: 1; pointer-events: auto; }
.scroll-top:hover { background: var(--border-strong); color: #fff; }

@media (max-width: 768px) {
  .site-nav { padding: 0.7rem 1.25rem; position: relative; }  /* non-sticky on mobile */

  .nav-toggle { display: flex; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    background: var(--bg);
    border-bottom: 1px solid var(--border-strong);
    padding: 0.5rem 0;
    z-index: 49;
  }
  .nav-links.nav-open { display: flex; }
  .nav-links a {
    padding: 0.6rem 1.5rem;
    border-radius: 0;
  }
}

/* Chart height classes (design-system.md) */
.chart-sm  { height: 200px; }
.chart-md  { height: 300px; }
.chart-lg  { height: 400px; }
.chart-xl  { height: 500px; }

/* Freshness indicators (design-system.md) */
.freshness {
  display: inline-block;
  margin-left: 0.4em;
  font-size: 0.7em;
  vertical-align: middle;
  cursor: help;
}
.freshness.fresh { color: var(--green); }
.freshness.stale { color: var(--amber); }
.freshness.unavailable { color: var(--red); }

/* Chart tabs (forecast page) */
.chart-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 0.5rem;
}
.chart-tabs button {
  background: var(--bg-card);
  color: var(--text-muted);
  border: 1px solid var(--border);
  border-right: none;
  padding: 0.35rem 0.9rem;
  font: 0.75rem var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.chart-tabs button:last-child { border-right: 1px solid var(--border); }
.chart-tabs button.active {
  background: var(--border-strong);
  color: var(--white);
}
.chart-tabs button:hover:not(.active) {
  background: var(--border);
  color: var(--text);
}

/* Forecast page layout */
.forecast-main { max-width: 1100px; margin: 0 auto; padding: 1.5rem 2rem 3rem; }
.forecast-header { margin-bottom: 1.5rem; }
.forecast-header h1 { font-size: 1.8rem; font-weight: normal; letter-spacing: 0.1em; color: var(--white); }
.forecast-header p { font-size: 0.95rem; color: var(--text-dim); margin-top: 0.25rem; }

/* Stat grid (run comparison, model metrics) */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
  margin: 0.75rem 0;
}
.stat-grid .stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 0.75rem;
  text-align: center;
}
.stat-grid .stat-value {
  font: 1.3rem var(--font-sans);
  color: var(--text);
}
.stat-grid .stat-value.green { color: var(--green); }
.stat-grid .stat-value.amber { color: var(--amber); }
.stat-grid .stat-value.red   { color: var(--red); }
.stat-grid .stat-label {
  font: 0.7rem var(--font-sans);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.25rem;
}

/* Replay controls */
.replay-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.5rem;
}
.replay-controls button {
  background: var(--bg-card);
  color: var(--amber);
  border: 1px solid var(--border);
  padding: 0.3rem 0.8rem;
  font: 0.75rem var(--font-sans);
  cursor: pointer;
}
.replay-controls .replay-ts {
  font: 0.75rem var(--font-sans);
  color: var(--text-muted);
}
.replay-controls progress {
  flex: 1;
  height: 4px;
  appearance: none;
  background: var(--border);
  border: none;
}
.replay-controls progress::-webkit-progress-bar { background: var(--border); }
.replay-controls progress::-webkit-progress-value { background: var(--amber); }

/* Error analysis grid */
.error-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

/* Attribution footer */
.chart-attribution {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font: 0.72rem var(--font-sans);
  color: var(--text-dimmer);
}
.chart-attribution a { color: var(--text-muted); }

@media (max-width: 700px) {
  .content-inner { padding: 1.5rem 1.25rem 4rem; }
  .chart-wrap { height: 200px; }
  .chart-lg { height: 300px; }
  .chart-xl { height: 380px; }
  .forecast-main { padding: 1rem; }
}

/* ── Freshness indicators (Constitution Principle 4) ── */
.freshness-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  margin-left: 0.5em;
  font-size: 0.7em;
  vertical-align: middle;
}
.fi-dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
}
.freshness-indicator.fresh .fi-dot { background: var(--green); }
.freshness-indicator.delayed .fi-dot { background: var(--amber); }
.freshness-indicator.unavailable .fi-dot { background: var(--red); }
.fi-age {
  color: var(--text-muted);
  font-size: 0.85em;
}