@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;600&family=IBM+Plex+Sans:wght@300;400;500;600&display=swap');

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

:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface2: #1c2230;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --text-dim: #6e7681;
  --accent: #58a6ff;
  --accent2: #3fb950;
  --accent3: #f78166;
  --accent4: #d2a8ff;
  --accent5: #ffa657;
  --mono: 'IBM Plex Mono', monospace;
  --sans: 'IBM Plex Sans', sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── NAV ── */
.site-header {
  height: 56px;
  display: flex;
  align-items: center;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  gap: 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  flex-shrink: 0;
}
.site-logo {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent2);
  text-decoration: none;
  padding-right: 2rem;
  border-right: 1px solid var(--border);
  white-space: nowrap;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex: 1;
}
.site-nav a {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}
.site-nav a:hover, .site-nav a.active { color: var(--text); }
.nav-game-link, .nav-wiki-link {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent2) !important;
  margin-left: auto;
}

/* ── GAME LAYOUT ── */
.game-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem;
  gap: 1rem;
}

.game-title {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.canvas-container {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg);
}

#game-canvas {
  display: block;
  image-rendering: pixelated;
}

/* ── MODAL ── */
.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(13, 17, 23, 0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.modal-overlay.visible {
  opacity: 1;
  pointer-events: all;
}

.modal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  width: min(580px, 90%);
  overflow: hidden;
  font-family: var(--sans);
}

.modal-header {
  padding: 0.6rem 1rem;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent4);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.modal-body {
  padding: 1.25rem 1rem;
}

.modal-narrative {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
  margin-bottom: 1.25rem;
  white-space: pre-line;
}

.modal-choices { display: flex; flex-direction: column; gap: 0.5rem; }

.choice-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 0.75rem;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
  font-family: var(--sans);
  width: 100%;
}
.choice-btn:hover, .choice-btn:focus {
  border-color: var(--accent);
  background: rgba(88, 166, 255, 0.06);
  outline: none;
}
.choice-key {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  margin-right: 0.5rem;
}
.choice-label { font-size: 13px; color: var(--text); }
.choice-sublabel { font-size: 11px; color: var(--text-dim); margin-top: 0.15rem; }

/* explanation shown after choosing */
.choice-explanation {
  display: none;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
  padding: 0.75rem;
  background: rgba(63, 185, 80, 0.06);
  border-left: 2px solid var(--accent2);
  border-radius: 0 4px 4px 0;
  margin-top: 0.5rem;
}
.choice-explanation.visible { display: block; }

.modal-footer {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.footer-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
  font-family: var(--mono);
  font-size: 11px;
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}
.footer-btn:hover { border-color: var(--accent); color: var(--text); }
.footer-btn .key { color: var(--accent); margin-right: 0.3rem; }

.continue-btn {
  background: var(--accent2);
  border: none;
  border-radius: 4px;
  color: #000;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  padding: 0.4rem 1rem;
  cursor: pointer;
  margin-left: auto;
  display: none;
}
.continue-btn.visible { display: block; }

/* papers accordion */
.papers-section { margin-top: 0.5rem; }
.papers-list {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--surface2);
  border-radius: 4px;
}
.papers-list.visible { display: flex; }
.papers-list a {
  font-size: 12px;
  color: var(--accent);
  text-decoration: none;
}
.papers-list a:hover { text-decoration: underline; }

/* ── ENDPOINT MODAL ── */
.endpoint-card {
  background: var(--surface);
  border: 1px solid var(--accent4);
  border-radius: 10px;
  width: min(620px, 92%);
  overflow: hidden;
}
.endpoint-header {
  padding: 0.6rem 1rem;
  background: rgba(210, 168, 255, 0.08);
  border-bottom: 1px solid var(--accent4);
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent4);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.endpoint-body { padding: 1.5rem 1.25rem; }
.endpoint-narrative {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  white-space: pre-line;
  margin-bottom: 1.5rem;
}
.endpoint-cta {
  display: inline-block;
  background: var(--accent2);
  color: #000;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  padding: 0.6rem 1.25rem;
  border-radius: 4px;
  text-decoration: none;
  transition: opacity 0.15s;
}
.endpoint-cta:hover { opacity: 0.85; }

/* ── LIGHTBOX ── */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.lightbox-overlay.visible { opacity: 1; pointer-events: all; }
.lightbox-overlay img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.lightbox-close {
  position: absolute;
  top: 1rem; right: 1.5rem;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
}

/* ── CUTSCENE ── */
.cutscene-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent2);
  text-align: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s;
  max-width: 400px;
  padding: 0.75rem 1rem;
  background: rgba(13, 17, 23, 0.8);
  border-radius: 4px;
  z-index: 5;
}
.cutscene-text.visible { opacity: 1; }

/* ── PAUSE OVERLAY ── */
.pause-overlay {
  position: absolute;
  inset: 0;
  background: rgba(13, 17, 23, 0.92);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-muted);
  z-index: 20;
}
.pause-overlay.visible { display: flex; }
.pause-overlay .key-row { display: flex; gap: 1rem; }
.pause-overlay .key { color: var(--accent); }

@media (max-width: 700px) {
  .game-wrapper { padding: 0.75rem; }
  .canvas-container { overflow-x: auto; }
}