:root {
  --panel: rgba(14, 15, 17, 0.78);
  --panel-border: rgba(255, 255, 255, 0.1);
  --text: #f4f1ea;
  --muted: rgba(244, 241, 234, 0.58);
  --line: rgba(255, 255, 255, 0.08);
  --accent: #e2b36a;
  --radius: 22px;
  color-scheme: dark;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
  height: 100%;
  overflow: hidden;
  background: #fff1dc;
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

body {
  cursor: none;
}

body.ui-visible {
  cursor: auto;
}

.stage {
  position: fixed;
  inset: 0;
  z-index: 0;
}

.hud {
  position: fixed;
  z-index: 2;
  left: 50%;
  bottom: max(1.25rem, env(safe-area-inset-bottom));
  width: min(42rem, calc(100vw - 1.5rem));
  transform: translateX(-50%) translateY(0);
  padding: 1rem 1.1rem 0.9rem;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow:
    0 24px 60px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(22px) saturate(1.2);
  -webkit-backdrop-filter: blur(22px) saturate(1.2);
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

body.ui-visible .hud {
  opacity: 1;
  pointer-events: auto;
}

body.ui-hidden .hud {
  transform: translateX(-50%) translateY(12px);
}

.hud-top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.75rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.brand-mark {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 3px;
  background: linear-gradient(135deg, #ffb067, #fff1dc 55%, #b9d7ff);
}

.readout {
  text-align: center;
}

.readout-value {
  font-size: 2.05rem;
  font-weight: 620;
  letter-spacing: -0.05em;
  line-height: 0.95;
  font-variant-numeric: tabular-nums;
}

.readout-value span {
  margin-left: 0.08em;
  font-size: 0.95rem;
  font-weight: 550;
  letter-spacing: 0.02em;
  color: var(--muted);
}

.readout-label {
  margin-top: 0.2rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.hud-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.4rem;
}

.icon-btn,
.custom-toggle,
.preset {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.icon-btn {
  height: 2rem;
  padding: 0 0.7rem;
  border-radius: 999px;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.icon-btn:hover,
.custom-toggle:hover,
.preset:hover {
  background: rgba(255, 255, 255, 0.1);
}

.icon-btn[aria-pressed="true"] {
  border-color: rgba(226, 179, 106, 0.55);
  background: rgba(226, 179, 106, 0.16);
}

.sliders {
  display: grid;
  gap: 0.85rem;
  padding: 0.95rem 0 0.2rem;
}

.slider-block {
  display: grid;
  gap: 0.4rem;
}

.slider-block[hidden] {
  display: none;
}

.slider-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

input[type="range"] {
  appearance: none;
  width: 100%;
  height: 0.55rem;
  border-radius: 999px;
  background: linear-gradient(
    90deg,
    #ff7a32 0%,
    #ffc07a 28%,
    #fff4e5 50%,
    #c7ddff 76%,
    #7eabff 100%
  );
  outline: none;
}

input[type="range"].brightness-slider {
  background: linear-gradient(90deg, #1a1a1a, #f7f3ea);
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 1.05rem;
  height: 1.05rem;
  border: 2px solid #fff;
  border-radius: 50%;
  background: #111;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

input[type="range"]::-moz-range-thumb {
  width: 1.05rem;
  height: 1.05rem;
  border: 2px solid #fff;
  border-radius: 50%;
  background: #111;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

.color-row {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

input[type="color"] {
  width: 2.6rem;
  height: 2rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: transparent;
  cursor: pointer;
}

input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 2px;
}

input[type="color"]::-webkit-color-swatch {
  border: 0;
  border-radius: 0.5rem;
}

#hex {
  flex: 1;
  height: 2rem;
  padding: 0 0.7rem;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font: inherit;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  user-select: text;
}

.modes {
  display: flex;
  align-items: stretch;
  gap: 0.55rem;
  padding-top: 0.85rem;
}

.presets {
  display: flex;
  flex: 1;
  gap: 0.4rem;
  overflow-x: auto;
}

.preset {
  display: grid;
  justify-items: center;
  gap: 0.35rem;
  min-width: 3.6rem;
  padding: 0.45rem 0.3rem 0.4rem;
  border-radius: 0.9rem;
  font-size: 0.62rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.preset.is-active {
  border-color: rgba(226, 179, 106, 0.7);
  background: rgba(226, 179, 106, 0.12);
  color: var(--text);
}

.swatch {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.18);
}

.custom-toggle {
  flex: 0 0 auto;
  padding: 0 0.9rem;
  border-radius: 0.9rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.custom-toggle[aria-pressed="true"] {
  border-color: rgba(226, 179, 106, 0.7);
  background: rgba(226, 179, 106, 0.16);
}

.hint {
  margin: 0.75rem 0 0;
  text-align: center;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: rgba(244, 241, 234, 0.42);
}

@media (max-width: 640px) {
  .hud-top {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand actions"
      "readout readout";
  }

  .brand {
    grid-area: brand;
  }

  .hud-actions {
    grid-area: actions;
  }

  .readout {
    grid-area: readout;
    text-align: left;
    padding-top: 0.35rem;
  }

  .preset span:last-child {
    display: none;
  }

  .preset {
    min-width: 2.2rem;
    padding: 0.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hud {
    transition: none;
  }
}