:root {
  --green: #76b900;
  --green-dim: #4d7a00;
  --bg: #060809;
  --panel: rgba(14, 17, 19, 0.92);
  --border: rgba(118, 185, 0, 0.25);
  --text: #e8ecef;
  --text-dim: #9aa4ab;
  font-size: 15px;
}

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

#scene {
  position: fixed;
  inset: 0;
  display: block;
  background: radial-gradient(ellipse 90% 70% at 50% 30%, #101518 0%, #08090b 55%, #040506 100%);
}

/* ---------- header ---------- */
#header {
  position: fixed;
  top: 22px;
  left: 26px;
  pointer-events: none;
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 30px; height: 30px;
  background: var(--green);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 30% 100%, 0 78%, 0 22%);
  box-shadow: 0 0 22px rgba(118, 185, 0, 0.55);
}
.brand h1 {
  font-size: 1.55rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.brand h1 span { color: var(--green); font-weight: 300; }
#level-subtitle {
  margin-top: 6px;
  color: var(--text-dim);
  font-size: 0.85rem;
  max-width: 420px;
}

/* ---------- breadcrumb ---------- */
#breadcrumb {
  position: fixed;
  top: 22px;
  right: 26px;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 10px;
  padding: 8px 14px;
  backdrop-filter: blur(8px);
}
.crumb {
  background: none;
  border: none;
  color: var(--text-dim);
  font: inherit;
  font-size: 0.82rem;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.crumb:hover { color: var(--text); background: rgba(255,255,255,0.06); }
.crumb.active { color: var(--green); font-weight: 600; }
.crumb.locked { opacity: 0.35; cursor: default; }
.crumb.locked:hover { color: var(--text-dim); background: none; }
.crumb-sep { color: #3a4147; font-size: 0.8rem; }

/* ---------- info panel ---------- */
#info-panel {
  position: fixed;
  top: 90px;
  right: 26px;
  width: 340px;
  max-height: calc(100vh - 200px);
  overflow-y: auto;
  z-index: 20;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.6), 0 0 0 1px rgba(0,0,0,0.4);
  transition: opacity 0.2s, transform 0.25s;
}
#info-panel.hidden {
  opacity: 0;
  transform: translateX(24px);
  pointer-events: none;
}
#info-close {
  position: absolute;
  top: 10px; right: 12px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
}
#info-close:hover { color: var(--text); }
#info-tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 10px;
}
#info-name { font-size: 1.25rem; font-weight: 650; margin-bottom: 8px; }
#info-blurb {
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--text-dim);
  margin-bottom: 14px;
}
#info-specs { width: 100%; border-collapse: collapse; font-size: 0.8rem; }
#info-specs tr { border-top: 1px solid rgba(255,255,255,0.07); }
#info-specs td { padding: 7px 2px; vertical-align: top; }
#info-specs td:first-child { color: var(--text-dim); width: 46%; padding-right: 10px; }
#info-specs td:last-child { color: var(--text); font-weight: 500; }
#info-drill {
  margin-top: 16px;
  width: 100%;
  background: var(--green);
  color: #0a0d05;
  border: none;
  border-radius: 9px;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 11px 0;
  cursor: pointer;
  transition: filter 0.15s;
}
#info-drill:hover { filter: brightness(1.12); }
#info-drill.hidden { display: none; }

/* ---------- tooltip ---------- */
#tooltip {
  position: fixed;
  z-index: 30;
  pointer-events: none;
  background: rgba(10, 12, 13, 0.95);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 5px 11px;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
  transform: translate(14px, 14px);
}
#tooltip.hidden { display: none; }
#tooltip small { color: var(--green); display: block; font-weight: 400; font-size: 0.68rem; }

/* ---------- hint bar ---------- */
#hint {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 22px;
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 999px;
  padding: 8px 24px;
  font-size: 0.72rem;
  color: var(--text-dim);
  backdrop-filter: blur(8px);
  pointer-events: none;
}
#hint b { color: var(--text); font-weight: 600; }

/* ---------- credit ---------- */
#credit {
  position: fixed;
  bottom: 18px;
  left: 26px;
  z-index: 10;
  font-size: 0.72rem;
  color: var(--text-dim);
  background: var(--panel);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 999px;
  padding: 8px 16px;
  backdrop-filter: blur(8px);
}
#credit a {
  color: var(--green);
  font-weight: 600;
  text-decoration: none;
}
#credit a:hover { text-decoration: underline; }
.credit-sep { margin: 0 5px; color: #3a4147; }
@media (max-width: 900px) {
  #credit { display: none; }
}

/* ---------- guided tour ---------- */
#tour-btn {
  position: fixed;
  bottom: 18px;
  right: 26px;
  z-index: 12;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--green);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 10px 20px;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: background 0.15s, box-shadow 0.15s;
}
#tour-btn:hover {
  background: rgba(118, 185, 0, 0.12);
  box-shadow: 0 0 18px rgba(118, 185, 0, 0.25);
}
#tour-btn.hidden { display: none; }

#tour-bar {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 15;
  display: flex;
  align-items: center;
  gap: 14px;
  width: min(760px, calc(100vw - 32px));
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px 44px 14px 18px;
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.6);
}
#tour-bar.hidden { display: none; }
.tour-body { flex: 1; min-width: 0; }
#tour-step {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--green);
}
#tour-text {
  margin-top: 3px;
  font-size: 0.84rem;
  line-height: 1.45;
  color: var(--text);
}
.tour-nav {
  flex-shrink: 0;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 9px;
  color: var(--text);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 9px 16px;
  cursor: pointer;
  transition: background 0.15s;
}
.tour-nav:hover { background: rgba(255,255,255,0.12); }
.tour-nav:disabled { opacity: 0.35; cursor: default; }
.tour-nav:disabled:hover { background: rgba(255,255,255,0.06); }
.tour-nav.primary { background: var(--green); color: #0a0d05; border-color: transparent; }
.tour-nav.primary:hover { filter: brightness(1.12); }
#tour-exit {
  position: absolute;
  top: 8px;
  right: 12px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
}
#tour-exit:hover { color: var(--text); }
body.touring #hint { display: none; }
@media (max-width: 900px) {
  body.touring #breadcrumb { display: none; }
  #tour-bar { bottom: 12px; }
}

/* ---------- transition fade ---------- */
#fade {
  position: fixed;
  inset: 0;
  background: var(--bg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.28s ease;
  z-index: 40;
}
#fade.on { opacity: 1; }

body.pointer-interactive { cursor: pointer; }

@media (max-width: 900px) {
  #header { left: 16px; top: 14px; }
  #level-subtitle { display: none; }
  #breadcrumb { top: auto; bottom: 70px; right: 50%; transform: translateX(50%); }
  #info-panel { right: 12px; left: 12px; width: auto; top: auto; bottom: 120px; max-height: 46vh; }
  #hint { display: none; }
}