:root {
  --gold: #d8b56a;
  --gold-strong: #f0cf85;
  --gold-dark: #9c7c3f;
  --paper: #f3e9d2;
  --ink: #231c10;
  --panel-bg: rgba(24, 20, 12, 0.82);
  --panel-border: rgba(216, 181, 106, 0.35);
  --font-serif: Georgia, "Times New Roman", serif;
  --font-ui: "Space Grotesk", -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

html, body { height: 100%; overflow: hidden; background: #0d0b08; font-family: var(--font-ui); }

#app { position: fixed; inset: 0; }

#canvas-wrap { position: absolute; inset: 0; }
#canvas-wrap canvas { display: block; }

/* ---------- Labels 3D ---------- */
.label {
  font-family: var(--font-ui);
  font-size: 12px;
  color: var(--paper);
  background: rgba(20, 16, 9, 0.72);
  border: 1px solid rgba(216, 181, 106, 0.5);
  border-radius: 999px;
  padding: 2px 10px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  backdrop-filter: blur(3px);
  text-shadow: 0 1px 2px #000;
  pointer-events: none;
  user-select: none;
}
.label::before {
  content: "";
  position: absolute;
  left: 50%; bottom: -6px;
  width: 1px; height: 6px;
  background: rgba(216, 181, 106, 0.6);
}
.label.gold { background: rgba(120, 88, 30, 0.85); border-color: var(--gold-strong); color: #fff6dc; }

/* ---------- HUD ---------- */
#hud {
  position: absolute; top: 76px; left: 0; right: 0;
  display: flex; justify-content: space-between; align-items: flex-start;
  padding: 8px 16px; gap: 12px; pointer-events: none;
}
#hud .brand {
  display: flex; gap: 10px; align-items: center;
  background: var(--panel-bg); border: 1px solid var(--panel-border);
  border-radius: 10px; padding: 8px 14px;
  pointer-events: auto; backdrop-filter: blur(8px);
}
.brand-mark { font-size: 26px; filter: drop-shadow(0 0 6px rgba(240,207,133,.5)); }
.brand h1 { font-family: var(--font-serif); font-size: 16px; color: var(--gold-strong); letter-spacing: .08em; }
.brand p { font-size: 10.5px; color: #b9a77e; letter-spacing: .18em; text-transform: uppercase; }

.hud-actions {
  display: flex; gap: 8px; align-items: center; flex-wrap: wrap;
  justify-content: flex-end; pointer-events: auto;
}
.hud-actions button, #hud .tgl {
  background: var(--panel-bg); color: var(--paper);
  border: 1px solid var(--panel-border); border-radius: 8px;
  padding: 7px 12px; font-size: 12.5px; cursor: pointer;
  transition: all .15s; backdrop-filter: blur(8px); user-select: none;
}
.hud-actions button:hover { border-color: var(--gold); color: var(--gold-strong); }
.hud-actions button.active { background: var(--gold-dark); color: #1a1408; border-color: var(--gold-strong); }
.hud-actions .tgl { display: inline-flex; gap: 6px; align-items: center; }
.hud-actions .tgl input { accent-color: var(--gold); }

/* ---------- Sidebar ---------- */
#panel {
  position: absolute; top: 146px; left: 18px; width: 272px; max-height: calc(100vh - 210px);
  display: flex; flex-direction: column;
  background: var(--panel-bg); border: 1px solid var(--panel-border);
  border-radius: 12px; overflow: hidden;
  backdrop-filter: blur(10px);
  transition: transform .25s ease, opacity .25s;
}
#panel.collapsed { transform: translateX(calc(-100% - 24px)); opacity: 0; }
.panel-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px; border-bottom: 1px solid var(--panel-border);
}
.panel-head h2 { font-family: var(--font-serif); font-size: 14px; color: var(--gold-strong); letter-spacing: .1em; }
#btn-panel-close, #btn-info-close, #btn-help { background: none; border: none; color: #b9a77e; cursor: pointer; font-size: 14px; }
#btn-panel-close:hover, #btn-info-close:hover { color: #fff; }

#part-list { overflow-y: auto; padding: 10px 12px; display: flex; flex-direction: column; gap: 2px; }
#part-list::-webkit-scrollbar { width: 6px; }
#part-list::-webkit-scrollbar-thumb { background: var(--gold-dark); border-radius: 3px; }
.cat { font-size: 10px; letter-spacing: .22em; text-transform: uppercase; color: var(--gold); margin: 10px 2px 4px; font-weight: 600; }
.part-btn {
  display: flex; align-items: center; gap: 8px;
  background: none; border: none; text-align: left;
  color: var(--paper); font-size: 13px; padding: 6px 8px;
  border-radius: 7px; cursor: pointer; transition: background .12s;
}
.part-btn:hover { background: rgba(216, 181, 106, 0.12); }
.part-btn.active { background: rgba(216, 181, 106, 0.22); color: var(--gold-strong); }
.part-btn .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--gold-dark); flex: none; }
.part-btn.active .dot { background: var(--gold-strong); box-shadow: 0 0 8px var(--gold); }

.panel-foot { padding: 8px 14px; border-top: 1px solid var(--panel-border); font-size: 11px; color: #8d7f5e; }

/* ---------- Info card ---------- */
#info-card {
  position: absolute; bottom: 26px; right: 26px; width: 340px;
  background: var(--panel-bg); border: 1px solid var(--gold);
  border-radius: 12px; padding: 16px 18px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 30px rgba(0,0,0,.5);
  animation: card-in .3s ease;
}
#info-card.hidden { display: none; }
@keyframes card-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
#info-card .info-close { position: absolute; top: 8px; right: 10px; }
#info-name { font-family: var(--font-serif); font-size: 19px; color: var(--gold-strong); margin-bottom: 2px; }
.info-hebrew { font-size: 13px; color: var(--gold); font-style: italic; margin-bottom: 2px; }
.info-ref { font-size: 11px; color: #8d7f5e; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 8px; }
#info-desc { font-size: 13px; line-height: 1.55; color: #e8dcc0; }

/* ---------- Tooltip ---------- */
#tooltip {
  position: absolute; padding: 5px 11px; border-radius: 7px;
  background: rgba(15, 12, 7, .9); border: 1px solid var(--panel-border);
  color: var(--gold-strong); font-size: 12px; pointer-events: none;
  transform: translate(-50%, -130%); white-space: nowrap;
  z-index: 20;
}
#tooltip.hidden { display: none; }

/* ---------- Help & intro ---------- */
#btn-help {
  position: absolute; right: 18px; bottom: 22px; width: 38px; height: 38px;
  border-radius: 50%; background: var(--panel-bg); border: 1px solid var(--panel-border);
  color: var(--gold); font-size: 17px; font-weight: 700;
  cursor: pointer; backdrop-filter: blur(8px);
}
#btn-help:hover { border-color: var(--gold); }

#help-overlay {
  position: absolute; inset: 0; background: rgba(8, 6, 3, .72);
  display: flex; align-items: center; justify-content: center; z-index: 50;
}
#help-overlay.hidden { display: none; }
.t3d-help-card {
  background: #171208; border: 1px solid var(--gold); border-radius: 14px;
  padding: 26px 32px; max-width: 460px; color: var(--paper);
  box-shadow: 0 10px 50px rgba(0,0,0,.6);
}
.t3d-help-card h2 { font-family: var(--font-serif); color: var(--gold-strong); margin-bottom: 14px; letter-spacing: .08em; }
.t3d-help-card ul { list-style: none; display: flex; flex-direction: column; gap: 9px; font-size: 13.5px; line-height: 1.5; }
.t3d-help-card li b { color: var(--gold-strong); }
.t3d-help-card .btn-gold { margin-top: 18px; }

#intro {
  position: absolute; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(ellipse at 50% 35%, #2a2113 0%, #0d0b08 70%);
  transition: opacity .6s ease;
}
#intro.fade { opacity: 0; pointer-events: none; }
.t3d-intro-card { text-align: center; max-width: 620px; padding: 20px; }
.t3d-intro-kicker { font-size: 12px; letter-spacing: .4em; color: var(--gold); text-transform: uppercase; margin-bottom: 14px; }
.t3d-intro-title {
  font-family: var(--font-serif); font-size: clamp(34px, 6vw, 58px);
  color: var(--gold-strong); letter-spacing: .06em; margin-bottom: 14px;
  text-shadow: 0 0 40px rgba(240, 207, 133, .35);
}
.t3d-intro-sub { font-size: 15px; line-height: 1.7; color: #d6c8a8; margin-bottom: 22px; }
.t3d-intro-sub strong { color: var(--gold-strong); }
.t3d-intro-hints { display: flex; flex-wrap: wrap; gap: 8px 18px; justify-content: center; font-size: 12.5px; color: #a99566; margin-bottom: 26px; }
.t3d-intro-hints span { display: inline-flex; align-items: center; gap: 6px; }
.t3d-intro-hints svg { width: 16px; height: 16px; color: var(--gold); flex-shrink: 0; }
.btn-gold {
  font-family: var(--font-serif); font-size: 15px; letter-spacing: .14em;
  background: linear-gradient(180deg, #f0cf85, #c29a45);
  color: #221803; border: none; border-radius: 10px;
  padding: 13px 34px; cursor: pointer;
  box-shadow: 0 6px 24px rgba(210, 165, 75, .35);
  transition: transform .15s, box-shadow .15s;
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(210, 165, 75, .5); }

/* Walk hint */
#walk-hint {
  position: absolute; bottom: 22px; left: 50%; transform: translateX(-50%);
  background: var(--panel-bg); border: 1px solid var(--gold);
  color: var(--gold-strong); font-size: 13px; letter-spacing: .06em;
  padding: 9px 18px; border-radius: 999px; backdrop-filter: blur(8px);
  z-index: 30; white-space: nowrap;
}
#walk-hint.hidden { display: none; }

/* Credits */
.credits {
  position: absolute; bottom: 10px; left: 50%; transform: translateX(-50%);
  font-size: 10px; color: rgba(217, 199, 155, .5); letter-spacing: .12em;
  z-index: 5; pointer-events: none; white-space: nowrap;
}

/* ---------- Tarjetas de la sección "Componentes" ---------- */
.parts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin-top: 18px;
}
.part-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: left;
  background: rgba(35, 28, 16, 0.55);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 14px 16px;
  color: var(--paper);
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s ease;
}
.part-card:hover {
  border-color: var(--gold);
  background: rgba(35, 28, 16, 0.85);
  transform: translateY(-2px);
}
.part-card .pc-name {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 15px;
  color: var(--gold-strong);
}
.part-card .pc-ref {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(243, 233, 210, 0.6);
}
.part-card p {
  font-size: 12.5px;
  line-height: 1.5;
  color: rgba(243, 233, 210, 0.85);
  margin: 0;
}

@media (max-width: 860px) {
  #panel { width: 230px; top: 210px; max-height: calc(100vh - 270px); }
  #hud { top: 66px; left: 8px; right: 8px; padding: 6px; flex-wrap: wrap; row-gap: 8px; }
  #hud .brand { padding: 6px 10px; }
  #hud .brand h1 { font-size: 13px; }
  #hud .brand p { display: none; }
  .hud-actions { flex: 1 1 100%; justify-content: flex-start; }
  .hud-actions .tgl { font-size: 11px; padding: 5px 8px; gap: 4px; }
  #info-card { right: 10px; bottom: 12px; width: calc(100vw - 20px); }
}