/**
 * Optical Capsule — demo app chrome: layout, control panels, background page rig.
 */

:root {
  color-scheme: dark;
  --bg-base: #c02010;
  --bg-accent: #13213d;
  --bg-image: none;
  --bg-texture-opacity: 0.32;
  --bg-texture-scale: 28px;
  --hero-text: rgba(255, 255, 255, 0.96);
  --hero-muted: rgba(255, 255, 255, 0.68);
  --hero-shadow: rgba(0, 0, 0, 0.42);
  --text: rgba(255, 255, 255, 0.96);
  --muted: rgba(255, 255, 255, 0.62);
}

* {
  box-sizing: border-box;
}

body {
  position: relative;
  min-height: 100vh;
  margin: 0;
  background: var(--bg-base);
  background-attachment: fixed;
  background-position: center;
  background-size: cover;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  content: "";
  opacity: var(--bg-texture-opacity);
}

body[data-bg-mode="solid"]::before {
  opacity: 0;
}

body[data-bg-mode="radial"]::before {
  background:
    radial-gradient(circle at 68% 18%, var(--bg-accent), transparent 42%),
    radial-gradient(circle at 18% 76%, rgba(80, 180, 255, 0.2), transparent 34%);
}

body[data-bg-mode="grid"]::before {
  background-image:
    linear-gradient(rgba(255,255,255,0.11) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.11) 1px, transparent 1px),
    radial-gradient(circle at 68% 18%, var(--bg-accent), transparent 46%);
  background-size:
    var(--bg-texture-scale) var(--bg-texture-scale),
    var(--bg-texture-scale) var(--bg-texture-scale),
    100% 100%;
}

body[data-bg-mode="dots"]::before {
  background-image:
    radial-gradient(circle, rgba(255,255,255,0.34) 1.2px, transparent 2px),
    radial-gradient(circle at 70% 22%, var(--bg-accent), transparent 42%);
  background-size:
    var(--bg-texture-scale) var(--bg-texture-scale),
    100% 100%;
}

body[data-bg-mode="brushed"]::before {
  background-image:
    repeating-linear-gradient(100deg, rgba(255,255,255,0.09) 0 1px, transparent 1px 8px),
    radial-gradient(circle at 72% 18%, var(--bg-accent), transparent 44%);
  background-size:
    calc(var(--bg-texture-scale) * 1.8) calc(var(--bg-texture-scale) * 1.8),
    100% 100%;
}

body[data-bg-mode="image"] {
  background-image:
    linear-gradient(rgba(0, 0, 0, 0.02), rgba(0, 0, 0, 0.06)),
    var(--bg-image);
}

body[data-bg-mode="image"]::before {
  opacity: 0.35;
  background:
    radial-gradient(circle at 70% 16%, var(--bg-accent), transparent 52%);
}

.page {
  position: relative;
  z-index: 1;
  width: min(980px, calc(100vw - 42px));
  margin: 0 auto;
  padding: 42px 0 78px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 28px;
  margin-bottom: 46px;
}

h1 {
  margin: 0;
  color: var(--hero-text);
  font-size: clamp(38px, 6vw, 64px);
  line-height: 0.92;
  letter-spacing: 0;
  text-shadow:
    0 1px 1px var(--hero-shadow),
    0 0 18px color-mix(in srgb, var(--hero-shadow), transparent 38%);
}

.summary {
  max-width: 430px;
  margin: 0 0 4px;
  color: var(--hero-muted);
  font-size: 16px;
  line-height: 1.45;
  text-align: right;
  text-shadow:
    0 1px 1px var(--hero-shadow),
    0 0 12px color-mix(in srgb, var(--hero-shadow), transparent 44%);
}

.hero-stage {
  min-height: 230px;
  display: grid;
  place-items: center;
  margin-bottom: 70px;
}

.light-control-panel {
  margin-bottom: 54px;
  padding: 18px 20px 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(3, 4, 7, 0.88);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(12px);
}

.light-control-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 22px;
  margin-bottom: 18px;
}

.light-control-header h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 560;
  letter-spacing: 0;
}

.light-control-header p {
  max-width: 460px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
  text-align: right;
}

.light-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px 18px;
  align-items: end;
}

.control-field {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.light-controls .control-field-span {
  grid-column: 1 / -1;
}

.control-group-label {
  color: rgba(255, 255, 255, 0.52);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.control-field label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 12px;
  line-height: 1;
}

.control-value {
  color: rgba(255, 255, 255, 0.46);
  font-variant-numeric: tabular-nums;
}

.control-field select,
.control-field input[type="url"],
.control-field input[type="range"],
.control-field input[type="color"] {
  width: 100%;
}

.control-field select,
.control-field input[type="url"],
.control-field input[type="text"] {
  height: 32px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  padding: 0 9px;
  color: white;
  background: rgb(9, 10, 14);
}

.control-field input[type="url"]::placeholder,
.control-field input[type="text"]::placeholder {
  color: rgba(255, 255, 255, 0.38);
}

.control-field input[type="color"] {
  height: 32px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  padding: 3px;
  background: rgb(9, 10, 14);
}

.control-field input[type="range"] {
  accent-color: rgb(170, 205, 255);
}

.material-experimental-field {
  align-items: start;
}

.control-checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 0;
  line-height: 1.35;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.72);
  cursor: pointer;
}

.control-checkbox-label input[type="checkbox"] {
  margin: 2px 0 0;
  flex-shrink: 0;
  accent-color: rgb(170, 205, 255);
}

.control-checkbox-label code {
  font-size: 10px;
  color: rgba(255, 200, 120, 0.85);
}

.size-stack {
  display: grid;
  gap: 44px;
  padding-bottom: 40px;
}

.size-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.size-label {
  color: var(--muted);
  font-size: 13px;
  line-height: 1;
  text-align: center;
  text-transform: uppercase;
}

/**
 * Presentation: per-column xs previews inside `.presentation-panel` only (CSS variables, no rebake).
 */
.presentation-panel code {
  font-size: 0.92em;
  color: rgba(200, 220, 255, 0.88);
}

.presentation-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px 14px;
  align-items: stretch;
}

@media (max-width: 980px) {
  .presentation-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .presentation-columns {
    grid-template-columns: minmax(0, 1fr);
  }
}

.presentation-column {
  padding: 12px 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  background: rgba(5, 6, 10, 0.55);
  min-width: 0;
}

.presentation-column-heading {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.82);
}

.presentation-column-preview {
  display: grid;
  place-items: center;
  min-height: 120px;
  margin-bottom: 12px;
}

.presentation-column-controls.light-controls {
  grid-template-columns: 1fr;
  gap: 10px;
}

.presentation-panel .presentation-state-stage.capsule-stage .optical-capsule {
  position: relative;
  opacity: var(--presentation-opacity, 1);
  filter:
    brightness(var(--presentation-brightness, 1))
    saturate(var(--presentation-saturate, 1))
    drop-shadow(0 0 var(--presentation-glow-blur, 0px) var(--presentation-glow-color, transparent));
  transition:
    opacity 0.2s ease,
    filter 0.2s ease;
}

/* Button face tint via mix-blend; label span stays above (see OpticalCapsule.css z-index on span). */
.presentation-panel .presentation-state-stage.capsule-stage .optical-capsule::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background-color: var(--presentation-button-tint, transparent);
  mix-blend-mode: color;
  pointer-events: none;
  z-index: 3;
}

.cross-section-panel {
  margin-bottom: 54px;
  padding: 18px 20px 24px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(3, 4, 7, 0.88);
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(12px);
}

.cross-section-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 22px;
  margin-bottom: 18px;
}

.cross-section-header h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 560;
  letter-spacing: 0;
}

.cross-section-header p {
  max-width: 460px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
  text-align: right;
}

.cross-section-figure {
  width: 100%;
  overflow: hidden;
}

.cross-section-svg {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: top;
  overflow: visible;
}

@media (max-width: 720px) {
  header {
    align-items: start;
    flex-direction: column;
  }

  .summary {
    text-align: left;
  }

  .light-control-header {
    align-items: start;
    flex-direction: column;
  }

  .light-control-header p {
    text-align: left;
  }

  .light-controls {
    grid-template-columns: 1fr;
  }

  .cross-section-header {
    align-items: start;
    flex-direction: column;
  }

  .cross-section-header p {
    text-align: left;
  }
}