:root {
  --gold: #d4af37;
  --fire: #ff5a1f;
  --bg-0: #05060a;
  --panel: rgba(10, 12, 20, 0.72);
  --border: rgba(212, 175, 55, 0.35);
  --text: #eef1f7;
}

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

html, body, #app { height: 100%; width: 100%; }

body {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at 50% 30%, #12131d 0%, var(--bg-0) 70%);
  color: #eef1f7;
  overflow: hidden;
  user-select: none;
}

#scene {
  position: fixed;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}

/* Top heading ------------------------------------------------------------ */
#hud-top {
  position: fixed;
  top: 22px;
  left: 0;
  right: 0;
  text-align: center;
  pointer-events: none;
}

#hud-top h1 {
  font-size: clamp(28px, 6vw, 60px);
  letter-spacing: 0.32em;
  font-weight: 800;
  color: var(--gold);
  text-shadow: 0 0 24px rgba(212, 175, 55, 0.45);
  padding-left: 0.32em; /* balance the letter-spacing */
}

#hud-top .subtitle {
  margin-top: 6px;
  font-size: clamp(10px, 1.6vw, 13px);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(238, 241, 247, 0.55);
}

/* Form label ------------------------------------------------------------- */
#form-label {
  position: fixed;
  top: 50%;
  right: 28px;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  pointer-events: none;
}

#form-label .form-tag {
  font-size: 11px;
  letter-spacing: 0.3em;
  color: rgba(238, 241, 247, 0.45);
}

#form-name {
  font-size: clamp(18px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--gold);
  transition: color 0.6s ease, text-shadow 0.6s ease;
  text-shadow: 0 0 16px rgba(212, 175, 55, 0.4);
}

#form-name.fire {
  color: var(--fire);
  text-shadow: 0 0 22px rgba(255, 90, 31, 0.6);
}

/* Controls --------------------------------------------------------------- */
#controls {
  position: fixed;
  bottom: 34px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  backdrop-filter: blur(10px);
}

.btn {
  font: inherit;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: #eef1f7;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 10px;
  padding: 10px 16px;
  cursor: pointer;
  transition: transform 0.12s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover { background: rgba(255, 255, 255, 0.12); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: linear-gradient(135deg, var(--gold), #b8912b);
  border-color: var(--gold);
  color: #1a1406;
  font-weight: 700;
}
.btn-primary:hover { background: linear-gradient(135deg, #e6c04a, var(--gold)); }

.btn-primary.fire {
  background: linear-gradient(135deg, var(--fire), #c73a10);
  border-color: var(--fire);
  color: #200a02;
}

.btn .glyph { margin-right: 4px; }

.toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: rgba(238, 241, 247, 0.7);
  cursor: pointer;
}
.toggle input { cursor: pointer; accent-color: var(--gold); }

#hint {
  position: fixed;
  bottom: 10px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(238, 241, 247, 0.35);
  pointer-events: none;
}

@media (max-width: 560px) {
  #controls { flex-wrap: wrap; justify-content: center; width: min(92vw, 420px); }
  #form-label { top: auto; bottom: 120px; right: 16px; transform: none; }
}