:root {
  --bg: #04060a;
  --bg-2: #070a10;
  --panel: rgba(16, 22, 30, 0.72);
  --panel-solid: #0a0f16;
  --hair: rgba(255, 255, 255, 0.10);
  --hair-soft: rgba(255, 255, 255, 0.055);
  --ink: #eaf2f0;
  --ink-dim: #8a98a3;
  --ink-faint: #56636d;
  --neon: #f7f8f4;
  --neon-2: #ffffff;
  --neon-rgb: 247, 248, 244;
  --glow: 0 0 4px rgba(247, 248, 244, 0.10);
  --radius: 13px;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sans: "Space Grotesk", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: rgba(var(--neon-rgb), 0.18);
  color: #fff;
}

.playground {
  position: relative;
  height: 100svh;
  min-height: 620px;
  overflow: hidden;
  background: var(--bg);
}

.output-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  image-rendering: pixelated;
  background: var(--bg);
}

.fx {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  background:
    radial-gradient(100% 78% at 50% 42%, transparent 48%, rgba(0, 0, 0, 0.68) 100%),
    linear-gradient(180deg, rgba(4, 6, 10, 0.22), rgba(4, 6, 10, 0.72));
}

.fx::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.42;
  background: repeating-linear-gradient(
    180deg,
    rgba(0, 0, 0, 0) 0,
    rgba(0, 0, 0, 0) 2px,
    rgba(0, 0, 0, 0.26) 3px,
    rgba(0, 0, 0, 0) 4px
  );
}

.topbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 26px;
  pointer-events: none;
}

.topbar > * {
  pointer-events: auto;
}

.wordmark {
  display: flex;
  align-items: baseline;
  gap: 11px;
  min-width: 0;
}

.wordmark .glyph {
  width: 13px;
  height: 13px;
  border: 1.5px solid var(--neon);
  box-shadow: var(--glow);
  position: relative;
  transform: translateY(1px);
  flex: none;
}

.wordmark .glyph::after {
  content: "";
  position: absolute;
  inset: 2.5px;
  background: var(--neon);
  opacity: 0.85;
}

.wordmark b {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  white-space: nowrap;
}

.wordmark span:last-child {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.hero {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  text-align: center;
  pointer-events: none;
  transition: opacity 0.9s ease, transform 1s cubic-bezier(0.5, 0.05, 0.2, 1);
}

.hero h1 {
  margin: 0;
  font-size: clamp(42px, 9vw, 124px);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: 0;
  text-shadow: 0 0 24px rgba(0, 0, 0, 0.66), 0 0 46px rgba(0, 0, 0, 0.38);
}

.hero h1 em {
  color: var(--neon);
  font-style: normal;
  text-shadow: 0 0 6px rgba(var(--neon-rgb), 0.12);
}

.hero p,
.hero .enter {
  font-family: var(--mono);
  text-transform: uppercase;
}

.hero p {
  margin: 26px 0 0;
  color: var(--ink-dim);
  font-size: clamp(11px, 1.5vw, 14px);
  letter-spacing: 0.2em;
}

.hero .enter {
  margin-top: 30px;
  color: var(--ink-faint);
  font-size: 11px;
  letter-spacing: 0.18em;
  opacity: 0.9;
}

.boot-progress {
  position: relative;
  width: min(280px, 70vw);
  height: 3px;
  margin-top: 14px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  opacity: 0;
  transition: opacity 0.2s ease;
}

body.is-loading .boot-progress {
  opacity: 1;
}

.boot-progress span {
  position: absolute;
  inset: 0 auto 0 0;
  width: 42%;
  border-radius: inherit;
  background: var(--neon);
  box-shadow: var(--glow);
  animation: bootBar 1.15s ease-in-out infinite;
}

@keyframes bootBar {
  0% {
    transform: translateX(-105%);
  }
  55%,
  100% {
    transform: translateX(245%);
  }
}

body.landed .hero {
  opacity: 0;
  transform: scale(1.06);
}

body:not(.landed) .topbar {
  opacity: 0;
  transition: opacity 0.6s ease;
}

body.landed .topbar {
  opacity: 1;
}

.scroll-cue {
  position: absolute;
  bottom: 92px;
  left: 50%;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  transform: translateX(-50%);
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  opacity: 0;
  transition: opacity 0.6s ease 0.4s;
}

body.landed .scroll-cue {
  opacity: 1;
}

.scroll-cue .line {
  width: 1px;
  height: 26px;
  background: linear-gradient(var(--ink-faint), transparent);
  animation: cue 1.8s ease-in-out infinite;
}

@keyframes cue {
  0%,
  100% {
    transform: scaleY(0.5);
    transform-origin: top;
    opacity: 0.4;
  }
  50% {
    transform: scaleY(1);
    opacity: 1;
  }
}

.dock {
  position: absolute;
  left: 50%;
  bottom: 26px;
  z-index: 6;
  display: flex;
  align-items: stretch;
  gap: 8px;
  padding: 8px;
  border: 1px solid var(--hair);
  border-radius: 15px;
  background: var(--panel);
  box-shadow: 0 14px 34px -20px rgba(0, 0, 0, 0.76);
  backdrop-filter: blur(18px);
  transform: translateX(-50%) translateY(14px);
  opacity: 0;
  transition: opacity 0.6s ease 0.1s, transform 0.6s cubic-bezier(0.4, 0, 0.2, 1) 0.1s;
}

body.landed .dock,
body.booting .dock {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.status {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
  min-width: 152px;
  padding: 4px 14px 4px 10px;
  border-right: 1px solid var(--hair-soft);
}

.status .stat-row {
  display: flex;
  align-items: center;
  gap: 7px;
}

.status .led {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: var(--glow);
}

.status[data-state="running"] .led,
.status[data-state="loading"] .led {
  animation: pulse 1.1s ease-in-out infinite;
}

.status-spinner {
  display: none;
  width: 12px;
  height: 12px;
  border: 1.5px solid rgba(255, 255, 255, 0.22);
  border-top-color: var(--neon);
  border-radius: 50%;
  animation: spin 0.85s linear infinite;
}

.status[data-state="loading"] .status-spinner {
  display: inline-block;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.status[data-state="resting"] .led {
  background: var(--ink-faint);
  box-shadow: none;
}

.status[data-state="error"] .led {
  background: #ff5470;
  box-shadow: 0 0 8px rgba(255, 84, 112, 0.36);
}

@keyframes pulse {
  0%,
  100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.status .lab {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.status .sub {
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  border: 1px solid var(--hair-soft);
  border-radius: 9px;
  padding: 0 14px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.btn svg {
  width: 14px;
  height: 14px;
}

.btn:hover:not(:disabled) {
  border-color: rgba(var(--neon-rgb), 0.4);
  background: rgba(var(--neon-rgb), 0.08);
  color: #fff;
}

.btn:active:not(:disabled) {
  transform: translateY(1px);
}

.btn:disabled {
  cursor: progress;
  opacity: 0.5;
}

.btn.primary {
  border-color: transparent;
  background: var(--neon);
  color: #04060a;
  box-shadow: var(--glow);
  font-weight: 700;
}

.btn.icon {
  width: 40px;
  padding: 0;
}

.btn.secondary {
  background: rgba(255, 255, 255, 0.025);
}

.btn.wide {
  width: 100%;
}

.panel {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 7;
  display: flex;
  flex-direction: column;
  width: 370px;
  max-width: 92vw;
  height: 100%;
  border-left: 1px solid var(--hair);
  background: linear-gradient(180deg, rgba(10, 15, 22, 0.96), rgba(7, 11, 17, 0.97));
  box-shadow: -22px 0 42px -30px rgba(0, 0, 0, 0.86);
  backdrop-filter: blur(22px);
  transform: translateX(102%);
  transition: transform 0.42s cubic-bezier(0.45, 0, 0.15, 1);
}

.panel.open {
  transform: translateX(0);
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 22px 16px;
  border-bottom: 1px solid var(--hair-soft);
}

.panel-head h2 {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.panel-head .close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--hair-soft);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.035);
  color: var(--ink-dim);
  cursor: pointer;
  padding: 0;
  transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.panel-head .close svg {
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
}

.panel-head .close:hover {
  border-color: rgba(var(--neon-rgb), 0.28);
  background: rgba(var(--neon-rgb), 0.08);
  color: var(--ink);
}

.panel-head .close:active {
  transform: translateY(1px);
}

.panel-body {
  overflow-y: auto;
  padding: 20px 22px 30px;
}

.section-label {
  margin: 0 0 14px;
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.sample-canvas {
  display: block;
  max-width: 100%;
  margin: 0 auto 14px;
  border: 1px solid var(--hair);
  border-radius: 10px;
  background: var(--bg);
  cursor: crosshair;
  touch-action: none;
}

.palette {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 12px;
}

.swatch {
  position: relative;
  width: 42px;
  height: 42px;
  border: 1px solid var(--hair);
  border-radius: 10px;
  cursor: pointer;
  overflow: hidden;
  transition: box-shadow 0.16s ease, transform 0.16s ease, border-color 0.16s ease;
}

.swatch:hover {
  transform: translateY(-2px);
}

.swatch.active {
  border-color: var(--neon);
  box-shadow: var(--glow), 0 0 0 2px rgba(var(--neon-rgb), 0.14);
}

.palette-tools {
  position: relative;
  margin-bottom: 18px;
}

.add-colour {
  gap: 8px;
}

.add-colour span:first-child {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 17px;
  height: 17px;
  border: 1px solid var(--hair);
  border-radius: 50%;
  font-size: 14px;
  line-height: 1;
}

.native-colour {
  position: absolute;
  width: 1px;
  height: 1px;
  min-height: 1px;
  padding: 0;
  border: 0;
  opacity: 0;
  pointer-events: none;
}

.field {
  margin-bottom: 18px;
}

.field > label,
.field.pair label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 9px;
}

.field.pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field.pair label {
  margin-bottom: 0;
}

.size-control {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.stepper {
  display: grid;
  grid-template-columns: 34px minmax(48px, 1fr) 34px;
  align-items: stretch;
  min-height: 38px;
  overflow: hidden;
  border: 1px solid var(--hair);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.035);
}

.stepper button,
.stepper input {
  min-height: 38px;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.stepper button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  cursor: pointer;
  font: 700 16px var(--mono);
  transition: background 0.16s ease, color 0.16s ease;
}

.stepper button:hover:not(:disabled) {
  background: rgba(var(--neon-rgb), 0.08);
  color: #fff;
}

.stepper button:disabled {
  color: var(--ink-faint);
  cursor: not-allowed;
  opacity: 0.5;
}

.stepper input {
  width: 100%;
  max-width: none;
  padding: 8px 4px;
  border-left: 1px solid var(--hair-soft);
  border-right: 1px solid var(--hair-soft);
  text-align: center;
}

.stepper input:focus {
  box-shadow: inset 0 0 0 1px rgba(var(--neon-rgb), 0.28);
}

.stepper input::-webkit-outer-spin-button,
.stepper input::-webkit-inner-spin-button {
  margin: 0;
  appearance: none;
}

.name {
  color: var(--ink-dim);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.val {
  color: var(--neon);
  font-family: var(--mono);
  font-size: 11px;
}

input,
select {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--hair);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.035);
  color: var(--ink);
  font: 500 13px var(--mono);
  outline: none;
  padding: 8px 10px;
}

.select-shell {
  position: relative;
  display: block;
  width: 100%;
  z-index: 1;
}

.select-shell.compact {
  width: 84px;
  flex: none;
}

.select-shell::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 12px;
  width: 7px;
  height: 7px;
  border-right: 1.6px solid currentColor;
  border-bottom: 1.6px solid currentColor;
  color: var(--ink-dim);
  pointer-events: none;
  transform: translateY(-65%) rotate(45deg);
  transition: color 0.16s ease;
}

.select-shell:hover::after,
.select-shell:focus-within::after,
.select-shell.open::after {
  color: var(--ink);
}

select {
  appearance: none;
  cursor: pointer;
  padding-right: 42px;
}

.select-shell select {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
}

.select-trigger {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--hair-soft);
  border-radius: 9px;
  background:
    linear-gradient(90deg, transparent calc(100% - 36px), rgba(255, 255, 255, 0.04) calc(100% - 36px)),
    rgba(255, 255, 255, 0.035);
  color: var(--ink);
  cursor: pointer;
  font: 500 13px var(--mono);
  outline: none;
  padding: 8px 42px 8px 10px;
  text-align: left;
  transition: background 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

.select-trigger:hover,
.select-shell.open .select-trigger {
  border-color: rgba(var(--neon-rgb), 0.28);
  background:
    linear-gradient(90deg, transparent calc(100% - 36px), rgba(var(--neon-rgb), 0.06) calc(100% - 36px)),
    rgba(255, 255, 255, 0.045);
}

.select-trigger:focus-visible {
  border-color: rgba(var(--neon-rgb), 0.55);
  box-shadow: 0 0 0 3px rgba(var(--neon-rgb), 0.08);
}

.select-value {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.select-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  z-index: 20;
  display: none;
  max-height: 190px;
  overflow-y: auto;
  padding: 6px;
  border: 1px solid var(--hair);
  border-radius: 11px;
  background: rgba(9, 13, 19, 0.98);
  box-shadow: 0 16px 34px -24px rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(18px);
}

.select-shell.open {
  z-index: 30;
}

.select-shell.open .select-menu {
  display: grid;
  gap: 3px;
}

.select-option {
  width: 100%;
  min-height: 34px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--ink-dim);
  cursor: pointer;
  font: 500 12px var(--mono);
  padding: 7px 9px;
  text-align: left;
  transition: background 0.14s ease, color 0.14s ease;
}

.select-option:hover,
.select-option[aria-selected="true"] {
  background: rgba(var(--neon-rgb), 0.08);
  color: var(--ink);
}

select option {
  background: var(--panel-solid);
  color: var(--ink);
}

.field.pair input,
.field.pair select {
  max-width: 84px;
}

.field.pair .select-shell select {
  max-width: none;
}

.field.pair .select-shell .select-trigger {
  max-width: none;
}

input:focus,
select:focus {
  border-color: rgba(var(--neon-rgb), 0.55);
  box-shadow: 0 0 0 3px rgba(var(--neon-rgb), 0.08);
}

input[type="range"] {
  appearance: none;
  width: 100%;
  min-height: auto;
  height: 3px;
  border: 0;
  border-radius: 3px;
  background: var(--hair);
  padding: 0;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 15px;
  height: 15px;
  border: 2px solid var(--bg-2);
  border-radius: 50%;
  background: var(--neon);
  box-shadow: var(--glow);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 15px;
  height: 15px;
  border: 2px solid var(--bg-2);
  border-radius: 50%;
  background: var(--neon);
  cursor: pointer;
}

.divider {
  height: 1px;
  margin: 22px 0;
  background: var(--hair-soft);
}

.learn {
  position: relative;
  border-top: 1px solid var(--hair);
  background: var(--bg-2);
}

.learn::before {
  content: "";
  position: absolute;
  top: -120px;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(transparent, var(--bg-2));
  pointer-events: none;
}

.wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 28px;
}

.sec {
  padding: 92px 0;
  border-bottom: 1px solid var(--hair-soft);
}

.sec .idx {
  margin-bottom: 18px;
  color: var(--neon);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
}

.sec h3 {
  max-width: 18ch;
  margin: 0 0 22px;
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 600;
  line-height: 1.04;
  letter-spacing: 0;
}

.sec p {
  max-width: 62ch;
  margin: 0 0 18px;
  color: var(--ink-dim);
  font-size: 17px;
  line-height: 1.65;
}

.sec p:last-child {
  margin-bottom: 0;
}

.sec code {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.86em;
}

.sec p code {
  border: 1px solid var(--hair-soft);
  border-radius: 5px;
  background: rgba(255, 255, 255, 0.035);
  padding: 1px 5px;
}

.sec pre {
  max-width: 760px;
  margin: 24px 0;
  overflow-x: auto;
  border: 1px solid var(--hair);
  border-radius: 10px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.035), transparent 42%),
    rgba(5, 8, 12, 0.78);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.035);
}

.sec pre code {
  display: block;
  min-width: 100%;
  padding: 18px 20px;
  color: #dfe6e3;
  font-size: 13px;
  line-height: 1.65;
  white-space: pre;
}

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.6, 0.2, 1);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

.foot {
  padding: 80px 0 100px;
  text-align: center;
}

.foot a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border: 1px solid rgba(var(--neon-rgb), 0.4);
  border-radius: 10px;
  padding: 0 26px;
  color: var(--neon);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-decoration: none;
  text-transform: uppercase;
  transition: background 0.2s, box-shadow 0.2s;
}

.foot a:hover {
  background: rgba(var(--neon-rgb), 0.08);
  box-shadow: var(--glow);
}

.foot .meta {
  margin-top: 34px;
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
}

@media (max-width: 760px) {
  .playground {
    min-height: 680px;
  }

  .topbar {
    align-items: flex-start;
    padding: 16px;
  }

  .wordmark {
    flex-wrap: wrap;
    max-width: 170px;
  }

  .wordmark b {
    font-size: 11px;
  }

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

  .status {
    display: none;
  }

  .dock {
    bottom: 16px;
    gap: 6px;
    padding: 6px;
  }

  .btn span.t {
    display: none;
  }

  .btn {
    padding: 0 12px;
  }

  .panel {
    width: 100%;
    max-width: 100vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto;
  }

  .scroll-cue .line,
  .status[data-state="running"] .led,
  .status[data-state="loading"] .led,
  .status-spinner,
  .boot-progress span {
    animation: none;
  }

  .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}