:root {
  --bg: #1A112C;
  --panel-bg: rgba(6, 6, 8, 0.82);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text: #e8e6e3;
  --text-dim: rgba(255, 255, 255, 0.4);
  --r: 3px;
  --font-display: "Instrument Serif", serif;
  --font-mono: "DM Mono", monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-mono);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---- Canvas ---- */

#board {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  display: block;
  background: #1A112C;
  cursor: none;
}

body:not(.ui-hidden) #board {
  cursor: default;
}

#grid-lines line {
  stroke: #fff;
  stroke-width: 1;
  stroke-opacity: 0.15;
}

#trail-layer line {
  pointer-events: none;
  stroke-linecap: round;
}

#hit-layer rect {
  fill: transparent;
  cursor: none;
}


.vector-mark {
  transform-box: fill-box;
  transform-origin: center center;
  shape-rendering: crispEdges;
  image-rendering: pixelated;
}

body.grid-hidden #grid-lines {
  display: none;
}

/* ---- Drop overlay ---- */

.drop-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  place-items: center;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

body.drop-active .drop-overlay {
  display: grid;
}

.drop-overlay-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  padding: 3rem 5rem;
  border: 1px dashed rgba(255, 255, 255, 0.25);
  border-radius: 10px;
  animation: drop-pulse 1.8s ease-in-out infinite;
}

@keyframes drop-pulse {
  0%,
  100% {
    border-color: rgba(255, 255, 255, 0.15);
  }
  50% {
    border-color: rgba(255, 255, 255, 0.4);
  }
}

.drop-overlay-icon {
  font-family: var(--font-display);
  font-size: 3.2rem;
  color: var(--text);
  line-height: 1;
}

.drop-overlay-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

/* ---- UI toggle ---- */

.ui-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 30;
  border: 1px solid var(--panel-border);
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: var(--text-dim);
  padding: 0.4rem 0.65rem;
  border-radius: var(--r);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  line-height: 1;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  transition: color 0.2s, border-color 0.2s;
}

.ui-toggle:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.22);
}

/* ---- Panel ---- */

.ui-panel {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 25;
  width: min(92vw, 320px);
  display: grid;
  gap: 0;
  background: var(--panel-bg);
  backdrop-filter: blur(24px) saturate(1.2);
  -webkit-backdrop-filter: blur(24px) saturate(1.2);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 0;
  overflow: hidden;
  transition: transform 200ms ease, opacity 160ms ease;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.55),
    0 0 0 0.5px rgba(255, 255, 255, 0.04) inset;
}

body.ui-hidden .ui-panel {
  transform: translateX(calc(-100% - 2rem));
  opacity: 0;
  pointer-events: none;
}

/* ---- Panel header ---- */

.panel-header {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.75rem 0.9rem 0.55rem;
}

.panel-header h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: #fff;
  line-height: 1;
}

/* ---- Divider ---- */

.panel-divider {
  height: 1px;
  background: var(--panel-border);
}

/* ---- Controls ---- */

.control-row {
  display: grid;
  gap: 0.45rem;
  padding: 0.55rem 0.9rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-weight: 500;
}

/* ---- Buttons ---- */

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.28rem;
}

button {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.035);
  color: var(--text-dim);
  border-radius: var(--r);
  padding: 0.32rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  line-height: 1;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: all 0.12s ease;
}

button:hover {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.18);
}

button:active {
  transform: scale(0.97);
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

button:disabled:hover {
  background: rgba(255, 255, 255, 0.035);
  color: var(--text-dim);
  border-color: rgba(255, 255, 255, 0.1);
}

button.is-active,
.toggle-btn.is-active,
.driver-btn.is-active {
  background: #fff;
  color: #000;
  border-color: #fff;
  font-weight: 500;
}

button.is-active:hover,
.toggle-btn.is-active:hover,
.driver-btn.is-active:hover {
  background: rgba(255, 255, 255, 0.88);
  border-color: rgba(255, 255, 255, 0.88);
  color: #000;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.3rem 0.4rem;
}

.icon-btn svg {
  display: block;
}

/* ---- Range sliders ---- */

.range-control {
  display: grid;
  gap: 0.25rem;
  color: var(--text-dim);
  font-size: 0.6rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.range-control.is-hidden {
  display: none;
}

.range-control.is-disabled {
  opacity: 0.45;
}

.range-control input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 1px;
  outline: none;
  cursor: pointer;
}

.range-control input[type="range"]:disabled {
  cursor: not-allowed;
}

.range-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.2);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.range-control input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.35);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.35);
}

.range-control input[type="range"]::-moz-range-thumb {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 0 6px rgba(255, 255, 255, 0.2);
}

.range-control input[type="range"]::-moz-range-track {
  height: 2px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 1px;
}

/* ---- Driver ---- */

.driver-buttons {
  gap: 0.28rem;
}

.driver-status {
  margin: 0;
  font-size: 0.55rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  letter-spacing: 0.05em;
  line-height: 1.5;
}

.panel-note {
  margin: 0;
  padding: 0.55rem 0.9rem 0.7rem;
  font-size: 0.52rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

/* ---- Camera preview ---- */

#camera-preview {
  width: min(260px, 100%);
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--panel-border);
  border-radius: var(--r);
  display: none;
  transform: none;
  filter: brightness(1.12) contrast(1.26);
  margin-top: 0.3rem;
}

body.camera-on #camera-preview {
  display: block;
}

body.camera-mirrored #camera-preview {
  transform: scaleX(-1);
}

/* ---- Image preview ---- */

#image-preview {
  width: min(260px, 100%);
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--panel-border);
  border-radius: var(--r);
  display: none;
  margin-top: 0.3rem;
}

body.image-on #image-preview {
  display: block;
}

/* ---- Color pickers ---- */

.color-row {
  display: flex;
  gap: 0.6rem;
}

.color-control {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
}

.color-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.swap-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.035);
  color: var(--text-dim);
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 0.3s ease, color 0.15s, border-color 0.15s;
}

.swap-btn:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.07);
  transform: rotate(180deg);
}

.swap-btn:active {
  transform: rotate(180deg) scale(0.9);
}

.swap-btn svg {
  display: block;
}

.color-control input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 3px;
  background: none;
  cursor: pointer;
  padding: 0;
}

.color-control input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 1px;
}

.color-control input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: 2px;
}

.color-control input[type="color"]::-moz-color-swatch {
  border: none;
  border-radius: 2px;
}

.hex-input {
  width: 62px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.04em;
  padding: 0.22rem 0.35rem;
  line-height: 1;
  outline: none;
  transition: border-color 0.15s, color 0.15s;
}

.hex-input:focus {
  border-color: rgba(255, 255, 255, 0.3);
  color: var(--text);
}

.hex-input.is-invalid {
  border-color: rgba(255, 80, 80, 0.5);
}

/* ---- Brand palette combos ---- */

.brand-palette {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 4px;
  margin-top: 0.25rem;
}

.combo-swatch {
  aspect-ratio: 1;
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.12s ease, border-color 0.15s, box-shadow 0.15s;
}

.combo-swatch span {
  display: block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.combo-swatch:hover {
  border-color: rgba(255, 255, 255, 0.45);
  transform: scale(1.1);
  z-index: 1;
}

.combo-swatch:active {
  transform: scale(0.92);
}

.combo-swatch.is-active {
  border-color: rgba(255, 255, 255, 0.7);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.35);
}

/* ---- Timeline ---- */

.timeline-panel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 26;
  background: var(--panel-bg);
  backdrop-filter: blur(24px) saturate(1.2);
  -webkit-backdrop-filter: blur(24px) saturate(1.2);
  border-top: 1px solid var(--panel-border);
  transition: transform 200ms ease, opacity 160ms ease;
  box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.45);
}

.timeline-panel.is-collapsed .timeline-body {
  display: none;
}

body.ui-hidden .timeline-panel {
  transform: translateY(100%);
  opacity: 0;
  pointer-events: none;
}


.timeline-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem;
}

.timeline-collapse-btn {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 0.2rem 0;
}

.timeline-collapse-btn:hover {
  color: var(--text);
  background: none;
  border: none;
}

.timeline-controls {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-left: auto;
}

.tl-btn {
  padding: 0.22rem 0.5rem;
  font-size: 0.6rem;
}

.tl-btn.is-active {
  background: #fff;
  color: #000;
  border-color: #fff;
}

.tl-time {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-dim);
  letter-spacing: 0.04em;
  min-width: 3.2em;
  text-align: right;
}

.tl-duration-label {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.tl-duration-input {
  width: 36px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.55rem;
  padding: 0.15rem 0.25rem;
  text-align: center;
  outline: none;
  -moz-appearance: textfield;
}

.tl-duration-input::-webkit-inner-spin-button,
.tl-duration-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

.tl-loop-label {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
}

.tl-loop-label input[type="checkbox"] {
  width: 12px;
  height: 12px;
  accent-color: #fff;
  cursor: pointer;
}

.timeline-body {
  display: flex;
  flex-direction: column-reverse;
  padding: 0.25rem 0.9rem 0.5rem;
}

.timeline-track {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  height: 22px;
  margin-bottom: 2px;
}

.track-label {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  width: 34px;
  flex-shrink: 0;
  text-align: right;
}

.track-bar {
  flex: 1;
  height: 18px;
  position: relative;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 2px;
  cursor: pointer;
}

.track-bar-inner {
  position: absolute;
  inset: 0;
}

.kf-diamond {
  position: absolute;
  top: 50%;
  width: 10px;
  height: 10px;
  background: #fff;
  transform: translate(-50%, -50%) rotate(45deg);
  cursor: grab;
  border-radius: 1px;
  transition: background 0.12s, box-shadow 0.12s;
  z-index: 2;
}

.kf-diamond:hover,
.kf-diamond.is-selected {
  background: #b8b0e8;
  box-shadow: 0 0 8px rgba(153, 142, 210, 0.5);
}

.kf-diamond.is-selected {
  background: #998ed2;
}

.timeline-playhead-area {
  position: relative;
  margin-left: 38px;
  height: 18px;
  margin-top: 2px;
}

.timeline-ruler {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-start;
  pointer-events: none;
}

.ruler-tick {
  position: absolute;
  bottom: 0;
  width: 1px;
  background: rgba(255, 255, 255, 0.1);
  height: 6px;
}

.ruler-tick.is-major {
  height: 10px;
  background: rgba(255, 255, 255, 0.2);
}

.ruler-label {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.42rem;
  color: rgba(255, 255, 255, 0.25);
  pointer-events: none;
}

.timeline-scrub {
  position: absolute;
  inset: 0;
  cursor: pointer;
}

.tl-playhead {
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 100%;
  background: #998ed2;
  pointer-events: none;
  box-shadow: 0 0 6px rgba(153, 142, 210, 0.5);
  z-index: 3;
}

.tl-playhead::before {
  content: "";
  position: absolute;
  top: -3px;
  left: -3px;
  width: 8px;
  height: 8px;
  background: #998ed2;
  border-radius: 50%;
}

/* ---- Mobile ---- */

@media (max-width: 760px) {
  .ui-panel {
    width: min(96vw, 300px);
  }

  .driver-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .drop-overlay-inner {
    padding: 2rem 3rem;
  }
}