:root {
  --bg-0: #03040a;
  --bg-1: #090d1f;
  --ink: #eaf0ff;
  --accent: rgb(95, 255, 225);
  --accent-warm: #ff8a5b;
  --glass: rgba(10, 12, 24, 0.58);
  --edge: rgba(255, 255, 255, 0.2);
  --preset-accent-rgb: 95, 255, 225;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  font-family: "Space Grotesk", sans-serif;
  background: radial-gradient(circle at 10% 10%, #1f2a54 0%, var(--bg-0) 45%),
    linear-gradient(160deg, var(--bg-0), var(--bg-1));
  color: var(--ink);
}

#light-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hud {
  position: fixed;
  left: 18px;
  top: 18px;
  right: 18px;
  max-width: 880px;
  padding: 14px 16px 16px;
  border: 1px solid var(--edge);
  border-radius: 16px;
  background: var(--glass);
  backdrop-filter: blur(18px);
  box-shadow: 0 16px 45px rgba(0, 0, 0, 0.44);
  transition: width 220ms ease, padding 220ms ease, background 220ms ease,
    border-color 220ms ease;
}

.hud-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.title-wrap {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

h1 {
  margin: 0;
  font-family: "Syne", sans-serif;
  font-size: clamp(1.4rem, 3vw, 2rem);
  letter-spacing: 0.14em;
}

.title-wrap p {
  margin: 0;
  font-size: 0.94rem;
  opacity: 0.8;
}

.hud-toggle {
  border: 1px solid rgba(255, 255, 255, 0.45);
  background: rgba(255, 255, 255, 0.08);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.3rem 0.72rem;
  font: inherit;
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.hud-toggle:hover {
  border-color: rgba(95, 255, 225, 0.9);
}

.preset-bar {
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.preset-label {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  opacity: 0.55;
}

.preset-hint {
  font-size: 0.72rem;
  opacity: 0.45;
}

.preset-btns {
  display: flex;
  gap: 6px;
}

.preset-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.05);
  color: var(--ink);
  font-family: "Syne", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: border-color 160ms ease, box-shadow 160ms ease, background 160ms ease, transform 80ms ease;
  position: relative;
}

.preset-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 7px;
  opacity: 0;
  transition: opacity 160ms ease;
  background: radial-gradient(circle at 50% 120%, rgba(var(--preset-accent-rgb), 0.35) 0%, transparent 70%);
}

.preset-btn.active {
  border-color: rgba(var(--preset-accent-rgb), 0.9);
  background: rgba(var(--preset-accent-rgb), 0.12);
  box-shadow: 0 0 14px rgba(var(--preset-accent-rgb), 0.4), inset 0 0 8px rgba(var(--preset-accent-rgb), 0.08);
}

.preset-btn.active::after {
  opacity: 1;
}

.preset-btn:hover:not(.active) {
  border-color: rgba(var(--preset-accent-rgb), 0.5);
  transform: translateY(-1px);
}

.preset-btn:active {
  transform: scale(0.92);
}

.scene-status {
  margin-top: 10px;
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.scene-status span {
  font-size: 0.8rem;
  opacity: 0.75;
}

.scene-sep {
  opacity: 0.35 !important;
}

#preset-vibe {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: rgba(var(--preset-accent-rgb), 0.85);
  opacity: 1 !important;
}

.scene-status strong {
  font-size: 1.03rem;
  color: var(--accent);
}

.help {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.86rem;
}

kbd {
  font-family: inherit;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 6px;
  padding: 0.15rem 0.4rem;
  background: rgba(255, 255, 255, 0.08);
}

.key-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(10, minmax(46px, 1fr));
  gap: 8px;
}

.key-chip {
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  padding: 7px 8px;
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.04);
  transition: transform 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
}

.key-chip strong {
  display: block;
  font-size: 0.9rem;
}

.key-chip.active {
  transform: translateY(-1px) scale(1.02);
  border-color: rgba(var(--preset-accent-rgb), 0.8);
  box-shadow: 0 0 20px rgba(var(--preset-accent-rgb), 0.35);
}

.hud.collapsed {
  right: auto;
  width: auto;
  max-width: none;
  padding: 8px 10px;
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(8, 10, 18, 0.22);
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.24);
}

.hud.collapsed .title-wrap p,
.hud.collapsed .preset-bar,
.hud.collapsed .scene-status,
.hud.collapsed .help,
.hud.collapsed .key-grid {
  display: none;
}

.hud.collapsed h1 {
  font-size: clamp(1.05rem, 2.8vw, 1.35rem);
  opacity: 0.85;
}

@media (max-width: 900px) {
  .hud {
    top: auto;
    bottom: 10px;
    left: 10px;
    right: 10px;
    padding: 10px 10px 12px;
  }

  .title-wrap p,
  .help {
    font-size: 0.78rem;
  }

  .key-grid {
    grid-template-columns: repeat(5, minmax(52px, 1fr));
  }

  .hud.collapsed {
    top: 10px;
    bottom: auto;
    left: 10px;
    right: auto;
  }
}