:root {
  --font-sans: 'Sora', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --text: #17243a;
  --muted: #5b6d85;
  --surface: rgba(255, 255, 255, 0.8);
  --surface-strong: rgba(255, 255, 255, 0.94);
  --line: rgba(19, 51, 81, 0.14);
  --live: #ff8a63;
  --live-rgb: 255, 138, 99;
  --shadow: 0 18px 44px rgba(26, 59, 90, 0.14);
}

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

html,
body {
  min-height: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: linear-gradient(140deg, #f4f8ff 0%, #fdf6ef 48%, #effbf4 100%);
  padding: 14px;
}

.bg-layer {
  position: fixed;
  inset: -12%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(circle at 16% 22%, rgba(255, 157, 114, 0.28), transparent 42%),
    radial-gradient(circle at 80% 16%, rgba(115, 169, 255, 0.24), transparent 45%),
    radial-gradient(circle at 55% 88%, rgba(108, 227, 181, 0.21), transparent 40%);
  animation: floatBg 14s ease-in-out infinite alternate;
}

@keyframes floatBg {
  from { transform: translate3d(-1.5%, -1%, 0); }
  to { transform: translate3d(1.5%, 1.2%, 0); }
}

.app {
  width: min(1220px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 12px;
}

.back-link {
  justify-self: start;
  text-decoration: none;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  background: rgba(255, 255, 255, 0.72);
}

.hero,
.panel {
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hero {
  padding: 16px 18px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 8px;
}

.hero h1 {
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  line-height: 1;
  margin-bottom: 8px;
}

.hero p {
  color: var(--muted);
  font-size: 0.94rem;
}

.layout {
  display: grid;
  grid-template-columns: minmax(260px, 320px) minmax(420px, 1fr) minmax(280px, 360px);
  grid-template-areas: 'core orbit inspect';
  gap: 12px;
}

.panel {
  padding: 14px;
}

.core-panel {
  grid-area: core;
}

.orbit-panel {
  grid-area: orbit;
}

.inspect-panel {
  grid-area: inspect;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.panel-head h2 {
  font-size: 1.05rem;
}

.panel-head span {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.picker-core {
  display: grid;
  gap: 10px;
}

.sv-box {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  touch-action: none;
  background: #ddd;
  outline: none;
}

.sv-box:focus-visible {
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--live) 38%, transparent 62%);
}

#sv-canvas {
  width: 100%;
  min-height: 258px;
  display: block;
}

.sv-cursor {
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow:
    0 0 0 1px rgba(0, 0, 0, 0.34),
    0 3px 12px rgba(0, 0, 0, 0.2);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.sliders {
  display: grid;
  gap: 8px;
}

.slider {
  display: grid;
  grid-template-columns: 52px 1fr auto;
  gap: 8px;
  align-items: center;
}

.slider span,
.slider output,
.group-label,
.hint {
  font-family: var(--font-mono);
  color: var(--muted);
}

.slider span,
.slider output {
  font-size: 11px;
}

.slider input[type='range'] {
  appearance: none;
  height: 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: linear-gradient(90deg, color-mix(in oklab, var(--live) 80%, white 20%), rgba(255, 255, 255, 0.75));
}

#hue-range {
  background: linear-gradient(
    90deg,
    hsl(0 100% 55%),
    hsl(60 100% 55%),
    hsl(120 75% 45%),
    hsl(180 78% 45%),
    hsl(240 88% 62%),
    hsl(300 90% 58%),
    hsl(360 100% 55%)
  );
}

#alpha-range {
  background-image:
    linear-gradient(45deg, #ced9e5 25%, transparent 25%),
    linear-gradient(-45deg, #ced9e5 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #ced9e5 75%),
    linear-gradient(-45deg, transparent 75%, #ced9e5 75%);
  background-size: 12px 12px;
  background-position: 0 0, 0 6px, 6px -6px, -6px 0;
}

.slider input[type='range']::-webkit-slider-thumb {
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid #fff;
  background: #19324a;
}

.slider input[type='range']::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid #fff;
  background: #19324a;
}

.preview-wrap {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  height: 102px;
  margin-bottom: 10px;
}

.checker {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, #d5e0ec 25%, transparent 25%),
    linear-gradient(-45deg, #d5e0ec 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #d5e0ec 75%),
    linear-gradient(-45deg, transparent 75%, #d5e0ec 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}

.preview {
  position: absolute;
  inset: 0;
  background: var(--live);
}

.rows {
  display: grid;
  gap: 8px;
  margin-bottom: 10px;
}

.row {
  display: grid;
  grid-template-columns: 46px 1fr auto;
  gap: 8px;
  align-items: center;
}

.row label,
.row p,
.row input {
  font-family: var(--font-mono);
  font-size: 12px;
}

.row p,
.row input {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface-strong);
  display: flex;
  align-items: center;
  padding: 0 9px;
  color: var(--text);
  overflow: auto;
  white-space: nowrap;
}

.row input {
  outline: none;
}

.row button,
.actions button,
#orbit-toggle {
  height: 34px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: color-mix(in oklab, var(--live) 16%, #fff 84%);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  cursor: pointer;
  padding: 0 10px;
}

.inputs {
  display: grid;
  gap: 8px;
}

.group-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 5px;
}

.triplet {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 7px;
}

.triplet label {
  display: grid;
  gap: 3px;
}

.triplet span {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--muted);
}

.triplet input {
  min-width: 0;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface-strong);
  font-family: var(--font-mono);
  color: var(--text);
  padding: 0 7px;
}

.orbit-field {
  border: 1px solid var(--line);
  border-radius: 15px;
  min-height: 340px;
  background:
    radial-gradient(circle at center, rgba(var(--live-rgb), 0.14), rgba(255, 255, 255, 0.7));
  position: relative;
  overflow: hidden;
  margin-bottom: 10px;
}

.orbit-node {
  position: absolute;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.88);
  box-shadow: 0 4px 12px rgba(16, 43, 71, 0.18);
  cursor: pointer;
  transform: translate(-50%, -50%);
}

.orbit-node::after {
  content: attr(data-label);
  position: absolute;
  left: 50%;
  top: calc(100% + 6px);
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--muted);
  white-space: nowrap;
}

.orbit-center {
  position: absolute;
  width: 62px;
  height: 62px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.92);
  box-shadow: 0 6px 14px rgba(16, 43, 71, 0.2);
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.orbit-center::after {
  content: 'Now';
  position: absolute;
  left: 50%;
  top: calc(100% + 6px);
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--muted);
}

.actions {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 8px;
}

.hint {
  font-size: 10px;
  margin-bottom: 8px;
}

.saved-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
  gap: 7px;
}

.saved-chip {
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 9px;
  cursor: pointer;
}

.saved-chip.empty {
  background: rgba(255, 255, 255, 0.5);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--muted);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%) translateY(8px);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  opacity: 0;
  transition: 0.2s;
  pointer-events: none;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 1120px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      'orbit'
      'core'
      'inspect';
  }

  #sv-canvas {
    min-height: 230px;
  }

  .orbit-field {
    min-height: 260px;
  }
}

@media (max-width: 560px) {
  .row {
    grid-template-columns: 1fr;
  }

  .row button {
    justify-self: start;
  }

  .actions {
    grid-template-columns: 1fr;
  }
}