/* ================================================================
   carousel/backgrounds.css — Section 02 Backgrounds
   6 color variants, dark/light tokens, grid overlay, noise, palettes
   ================================================================ */

/* ── Background Swatch (shared) ── */
.crsl-bg-swatch {
  position: relative;
  width: 100%;
  height: 200px;
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
}

/* Grid overlay via ::before (::after reserved by brandbook grain) */
.crsl-bg-swatch::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--swatch-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--swatch-grid) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

.crsl-bg-swatch__title {
  position: relative;
  z-index: 1;
  font-family: var(--f-display);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.crsl-bg-swatch__accent-tag {
  position: relative;
  z-index: 1;
  font-family: var(--f-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--r-sm);
}

.crsl-bg-swatch__body {
  position: relative;
  z-index: 1;
  font-family: var(--f-body);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.55;
  max-width: 340px;
  text-align: center;
}

.crsl-bg-swatch__body em {
  font-style: italic;
  font-weight: 500;
}

.crsl-bg-swatch__class {
  position: absolute;
  bottom: 12px;
  right: 16px;
  z-index: 1;
  font-family: var(--f-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.06em;
  opacity: 0.5;
}

.crsl-bg-swatch__type-badge {
  position: absolute;
  top: 12px;
  left: 16px;
  z-index: 1;
  font-family: var(--f-mono);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--r-xs);
}

/* ── Dark swatch tokens ── */
.crsl-bg-swatch--dark {
  color: #FBF9F4;
  --swatch-grid: rgba(255,255,255,0.025);
}

.crsl-bg-swatch--dark .crsl-bg-swatch__accent-tag {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
}

.crsl-bg-swatch--dark .crsl-bg-swatch__body em {
  color: var(--swatch-accent, #AF6DFF);
}

.crsl-bg-swatch--dark .crsl-bg-swatch__type-badge {
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.5);
}

/* ── Light swatch tokens ── */
.crsl-bg-swatch--light {
  color: #1C1C1C;
  --swatch-grid: rgba(0,0,0,0.035);
}

.crsl-bg-swatch--light .crsl-bg-swatch__accent-tag {
  background: rgba(0,0,0,0.03);
  border: 1px solid rgba(0,0,0,0.06);
}

.crsl-bg-swatch--light .crsl-bg-swatch__body em {
  color: var(--swatch-accent, #7A3DE8);
}

.crsl-bg-swatch--light .crsl-bg-swatch__type-badge {
  background: rgba(0,0,0,0.05);
  color: rgba(0,0,0,0.45);
}

/* ── 6 Background variants ── */
.crsl-bg-swatch--preto {
  --swatch-accent: #AF6DFF;
  background:
    radial-gradient(ellipse 900px 600px at 15% 15%, rgba(0,88,212,0.14), transparent 55%),
    radial-gradient(ellipse 700px 500px at 80% 75%, rgba(175,109,255,0.12), transparent 50%),
    radial-gradient(ellipse 500px 400px at 55% -5%, rgba(132,204,22,0.06), transparent 45%),
    linear-gradient(170deg, #141318 0%, #0D0D12 100%);
}

.crsl-bg-swatch--creme {
  --swatch-accent: #7A3DE8;
  background:
    radial-gradient(ellipse 700px 500px at 5% 0%, rgba(0,88,212,0.06), transparent 55%),
    radial-gradient(ellipse 600px 400px at 95% 5%, rgba(175,109,255,0.04), transparent 50%),
    radial-gradient(ellipse 500px 350px at 50% 95%, rgba(132,204,22,0.03), transparent 45%),
    linear-gradient(170deg, #FFFFFF 0%, #FBF9F4 100%);
}

.crsl-bg-swatch--azul {
  --swatch-accent: #AF6DFF;
  background:
    radial-gradient(ellipse 900px 600px at 20% 10%, rgba(0,88,212,0.35), transparent 55%),
    radial-gradient(ellipse 700px 500px at 80% 85%, rgba(175,109,255,0.18), transparent 50%),
    radial-gradient(ellipse 500px 400px at 60% 0%, rgba(251,249,244,0.04), transparent 40%),
    linear-gradient(170deg, #003A8C 0%, #002868 100%);
}

.crsl-bg-swatch--roxo {
  --swatch-accent: #FACC15;
  background:
    radial-gradient(ellipse 900px 600px at 20% 15%, rgba(175,109,255,0.35), transparent 55%),
    radial-gradient(ellipse 700px 500px at 85% 80%, rgba(122,61,232,0.25), transparent 50%),
    radial-gradient(ellipse 500px 350px at 50% 0%, rgba(250,204,21,0.06), transparent 40%),
    linear-gradient(170deg, #5B22C7 0%, #3D1485 100%);
}

.crsl-bg-swatch--vermelho {
  --swatch-accent: #FACC15;
  background:
    radial-gradient(ellipse 900px 600px at 15% 10%, rgba(248,79,46,0.35), transparent 55%),
    radial-gradient(ellipse 700px 500px at 85% 85%, rgba(200,40,15,0.2), transparent 50%),
    radial-gradient(ellipse 500px 350px at 55% 0%, rgba(250,204,21,0.06), transparent 40%),
    linear-gradient(170deg, #C42E10 0%, #8E1E08 100%);
}

.crsl-bg-swatch--verde {
  --swatch-accent: #FACC15;
  background:
    radial-gradient(ellipse 900px 600px at 20% 15%, rgba(132,204,22,0.3), transparent 55%),
    radial-gradient(ellipse 700px 500px at 80% 80%, rgba(99,208,89,0.18), transparent 50%),
    radial-gradient(ellipse 500px 350px at 50% 0%, rgba(250,204,21,0.05), transparent 40%),
    linear-gradient(170deg, #2D5A00 0%, #1A3D00 100%);
}


/* ── 7. Token System Table ── */
.crsl-bg-tokens {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--f-mono);
  font-size: 11px;
}

.crsl-bg-tokens thead th {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  text-align: left;
  padding: 8px 12px;
  border-bottom: 2px solid var(--border);
}

.crsl-bg-tokens tbody td {
  padding: 7px 12px;
  border-bottom: 1px solid var(--g-border-dim);
  vertical-align: top;
  line-height: 1.5;
}

.crsl-bg-tokens tbody tr:last-child td {
  border-bottom: none;
}

.crsl-bg-tokens__token {
  font-weight: 600;
  color: var(--accent-2);
  white-space: nowrap;
}

.crsl-bg-tokens__dark {
  color: var(--text-2);
  font-weight: 400;
}

.crsl-bg-tokens__light {
  color: var(--text-2);
  font-weight: 400;
}

.crsl-bg-tokens__group-label td {
  font-size: 8.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
  padding: 14px 12px 4px;
  border-bottom: 1px solid var(--border);
}


/* ── 8. Grid Overlay Demo ── */
.crsl-bg-grid-demo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  width: 100%;
}

.crsl-bg-grid-demo__panel {
  position: relative;
  height: 160px;
  border-radius: var(--r-md);
  overflow: hidden;
}

.crsl-bg-grid-demo__panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--panel-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--panel-grid) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.crsl-bg-grid-demo__panel--dark {
  background: linear-gradient(170deg, #141318 0%, #0D0D12 100%);
  --panel-grid: rgba(255,255,255,0.025);
}

.crsl-bg-grid-demo__panel--light {
  background: linear-gradient(170deg, #FFFFFF 0%, #FBF9F4 100%);
  --panel-grid: rgba(0,0,0,0.035);
}

.crsl-bg-grid-demo__label {
  position: absolute;
  bottom: 10px;
  left: 12px;
  font-family: var(--f-mono);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.crsl-bg-grid-demo__panel--dark .crsl-bg-grid-demo__label {
  color: rgba(255,255,255,0.35);
}

.crsl-bg-grid-demo__panel--light .crsl-bg-grid-demo__label {
  color: rgba(0,0,0,0.35);
}

.crsl-bg-grid-demo__size {
  position: absolute;
  top: 10px;
  right: 12px;
  font-family: var(--f-mono);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.crsl-bg-grid-demo__panel--dark .crsl-bg-grid-demo__size {
  color: rgba(255,255,255,0.25);
}

.crsl-bg-grid-demo__panel--light .crsl-bg-grid-demo__size {
  color: rgba(0,0,0,0.25);
}


/* ── 9. Noise Overlay Demo ── */
.crsl-bg-noise-demo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  width: 100%;
}

.crsl-bg-noise-demo__panel {
  position: relative;
  height: 160px;
  border-radius: var(--r-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 12px;
  gap: 4px;
}

.crsl-bg-noise-demo__panel::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.crsl-bg-noise-demo__panel--dark {
  background: linear-gradient(170deg, #141318 0%, #0D0D12 100%);
}

.crsl-bg-noise-demo__panel--dark::after {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.4 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.7'/></svg>");
  mix-blend-mode: screen;
  opacity: 0.06;
}

.crsl-bg-noise-demo__panel--light {
  background: linear-gradient(170deg, #FFFFFF 0%, #FBF9F4 100%);
}

.crsl-bg-noise-demo__panel--light::after {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.12  0 0 0 0 0.09  0 0 0 0 0.05  0 0 0 0.55 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/></svg>");
  mix-blend-mode: multiply;
  opacity: 0.08;
}

.crsl-bg-noise-demo__label {
  position: relative;
  z-index: 1;
  font-family: var(--f-mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.crsl-bg-noise-demo__panel--dark .crsl-bg-noise-demo__label {
  color: rgba(255,255,255,0.5);
}

.crsl-bg-noise-demo__panel--light .crsl-bg-noise-demo__label {
  color: rgba(0,0,0,0.45);
}

.crsl-bg-noise-demo__meta {
  position: relative;
  z-index: 1;
  font-family: var(--f-mono);
  font-size: 8.5px;
  font-weight: 400;
  letter-spacing: 0.04em;
}

.crsl-bg-noise-demo__panel--dark .crsl-bg-noise-demo__meta {
  color: rgba(255,255,255,0.3);
}

.crsl-bg-noise-demo__panel--light .crsl-bg-noise-demo__meta {
  color: rgba(0,0,0,0.3);
}

/* Boosted noise for demo visibility */
.crsl-bg-noise-demo__panel--dark.crsl-bg-noise-demo__panel--boosted::after {
  opacity: 0.35;
}

.crsl-bg-noise-demo__panel--light.crsl-bg-noise-demo__panel--boosted::after {
  opacity: 0.35;
}


/* ── 10. Palette Combos ── */
.crsl-bg-palettes {
  display: flex;
  flex-direction: column;
  gap: 28px;
  width: 100%;
}

.crsl-bg-palette-row {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.crsl-bg-palette-row__swatches {
  display: flex;
  gap: 4px;
  height: 56px;
  border-radius: var(--r-md);
  overflow: hidden;
}

.crsl-bg-palette-row__swatch {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.crsl-bg-palette-row__swatch-label {
  font-family: var(--f-mono);
  font-size: 8.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.6;
}

/* Palette mini backgrounds (simplified, no orbs, just base gradient) */
.crsl-bg-palette-row__swatch--preto {
  background: linear-gradient(170deg, #141318, #0D0D12);
  color: #FBF9F4;
}
.crsl-bg-palette-row__swatch--creme {
  background: linear-gradient(170deg, #FFFFFF, #FBF9F4);
  color: #1C1C1C;
}
.crsl-bg-palette-row__swatch--roxo {
  background: linear-gradient(170deg, #5B22C7, #3D1485);
  color: #FBF9F4;
}
.crsl-bg-palette-row__swatch--azul {
  background: linear-gradient(170deg, #003A8C, #002868);
  color: #FBF9F4;
}
.crsl-bg-palette-row__swatch--verde {
  background: linear-gradient(170deg, #2D5A00, #1A3D00);
  color: #FBF9F4;
}
.crsl-bg-palette-row__swatch--vermelho {
  background: linear-gradient(170deg, #C42E10, #8E1E08);
  color: #FBF9F4;
}

.crsl-bg-palette-row__desc {
  font-size: 12.5px;
  color: var(--text-2);
  line-height: 1.6;
}

.crsl-bg-palette-row__desc strong {
  font-weight: 600;
  color: var(--text);
}

.crsl-bg-palette-rules {
  margin-top: 8px;
  padding: 20px 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--g-border);
  background: var(--g-1);
  backdrop-filter: var(--g-blur);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.crsl-bg-palette-rules__item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 12.5px;
  color: var(--text-2);
  line-height: 1.6;
}

.crsl-bg-palette-rules__item::before {
  content: '';
  flex-shrink: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-2);
  margin-top: 7px;
}

.crsl-bg-palette-rules__item strong {
  font-weight: 600;
  color: var(--text);
}

.crsl-bg-palette-rules__item code {
  font-family: var(--f-mono);
  font-size: 11px;
  background: rgba(255,255,255,0.06);
  padding: 1px 5px;
  border-radius: var(--r-xs);
  color: var(--accent);
}


/* ── Responsive ── */
@media (max-width: 768px) {
  .crsl-bg-swatch {
    height: 160px;
  }

  .crsl-bg-grid-demo,
  .crsl-bg-noise-demo {
    grid-template-columns: 1fr;
  }

  .crsl-bg-grid-demo__panel,
  .crsl-bg-noise-demo__panel {
    height: 120px;
  }

  .crsl-bg-tokens {
    font-size: 9.5px;
  }

  .crsl-bg-tokens thead th,
  .crsl-bg-tokens tbody td {
    padding: 5px 8px;
  }

  .crsl-bg-palette-row__swatches {
    height: 44px;
  }
}