:root {
  color-scheme: light;
  --illusion-bg: #f6f7fb;
  --illusion-ink: #111827;
  --illusion-panel: #ffffff;
  --illusion-accent: #2563eb;
  --illusion-accent-strong: #1d4ed8;
  --illusion-soft: #e5e7eb;
  --illusion-soft-strong: #cbd5f5;
}

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

body {
  margin: 0;
  background: var(--illusion-bg);
  color: var(--illusion-ink);
  font-family: system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  line-height: 1.6;
}

main.illusion-page {
  display: flex;
  flex-direction: column;
  gap: clamp(24px, 4vw, 44px);
  max-width: min(1060px, 100%);
  margin: 0 auto;
  padding: clamp(16px, 6vw, 48px) clamp(16px, 5vw, 40px) clamp(48px, 8vw, 72px);
}

.hero {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 2.5vw, 18px);
}

.hero h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 600;
  line-height: 1.1;
}

.hero p {
  margin: 0;
  color: #374151;
  font-size: clamp(16px, 2.8vw, 19px);
}

.demo-frame,
.stage {
  background: var(--illusion-panel);
  border-radius: 22px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  padding: clamp(18px, 4vw, 32px);
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 3vw, 26px);
}

.demo-frame .kicker,
.stage .kicker {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  font-weight: 600;
  color: #4b5563;
  margin: 0;
}

.stage h2 {
  margin: 0;
  font-size: clamp(20px, 3.4vw, 28px);
  font-weight: 600;
  line-height: 1.25;
}

.stage p {
  margin: 0;
  color: #4b5563;
  font-size: 15px;
}

.demo-surface {
  position: relative;
  width: 100%;
  background: #fff;
  border-radius: 20px;
  box-shadow: inset 0 0 0 1px rgba(15, 23, 42, 0.04);
  overflow: hidden;
}

.demo-surface canvas {
  width: 100%;
  display: block;
  aspect-ratio: var(--demo-aspect, 3 / 4);
  min-height: clamp(200px, 65vw, 420px);
  border-radius: 18px;
}

.demo-surface video,
.demo-surface img,
.demo-surface svg {
  width: 100%;
  display: block;
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.control-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(120px, 240px) auto;
  gap: 12px;
  align-items: center;
}

.control-row label {
  font-weight: 600;
  color: #1f2937;
}

.control-row input[type="range"],
.control-row input[type="number"],
.control-row select {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--illusion-soft);
  background: #fff;
  padding: 6px 10px;
  font: inherit;
  line-height: 1.2;
}

.control-row input[type="color"] {
  justify-self: start;
  width: 72px;
  height: 34px;
  border: none;
  padding: 0;
  background: none;
}

.control-row .value {
  justify-self: end;
  font-variant-numeric: tabular-nums;
  color: #111827;
}

.control-check {
  display: flex;
  align-items: center;
  gap: 10px;
}

.control-check input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--illusion-accent);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

button {
  border: none;
  border-radius: 12px;
  padding: 10px 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  background: var(--illusion-soft);
  color: var(--illusion-ink);
}

button.primary {
  background: var(--illusion-accent);
  color: #fff;
}

button:focus-visible {
  outline: 2px solid var(--illusion-accent-strong);
  outline-offset: 2px;
}

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.presets .active {
  background: var(--illusion-accent);
  color: #fff;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.6);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px 10px;
  border-radius: 999px;
  background: rgba(37,99,235,0.1);
  color: var(--illusion-accent-strong);
  font-size: 12px;
  font-weight: 600;
}

.meter {
  display: flex;
  align-items: center;
  gap: 12px;
}

.meterbar {
  position: relative;
  flex: 1;
  height: 10px;
  border-radius: 999px;
  background: var(--illusion-soft);
  overflow: hidden;
}

.meterbar > i {
  position: absolute;
  inset: 0 0 0 auto;
  background: linear-gradient(90deg, #a5b4fc, #60a5fa, #2563eb);
  width: 0;
}

.stage-footer {
  font-size: 13px;
  color: #6b7280;
}

@media (max-width: 780px) {
  main.illusion-page {
    padding-left: clamp(12px, 4vw, 24px);
    padding-right: clamp(12px, 4vw, 24px);
  }
}

@media (max-width: 640px) {
  .control-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .control-row .value {
    justify-self: start;
  }

  .controls {
    gap: 14px;
  }
}