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

body {
  margin: 0;
  font-family: monospace;
  background: #111;
  color: #f0f0f0;
}

/* ---- Nav ---- */
nav {
  font-family: monospace;
  font-size: 0.85em;
  padding: 12px 20px;
  border-bottom: 1px solid #333;
}
nav a { color: inherit; text-decoration: none; }
nav a:hover { text-decoration: underline; }

/* ---- Layout ---- */
main {
  max-width: 860px;
  margin: auto;
  padding: 40px 24px 80px;
}

h1 {
  font-size: 1.6rem;
  margin: 0 0 8px;
  color: #f0f0f0;
}

h2 {
  font-size: 1rem;
  margin: 0 0 6px;
  color: #f0f0f0;
}

p { margin: 0 0 16px; font-size: 0.85rem; color: #aaa; line-height: 1.5; }

.intro { color: #aaa; margin: 8px 0 32px; }

.section {
  margin-top: 56px;
}

/* ---- mix-blend-mode grid ---- */
.blend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
}

.blend-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Demo container — dark background to show blend effects */
.blend-demo {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  background: #1a1a2e;
  border-radius: 6px;
  overflow: hidden;
}

/* Two overlapping color circles */
.layer {
  position: absolute;
  width: 65%;
  aspect-ratio: 1;
  border-radius: 50%;
}

.layer-a {
  background: #e84393;
  top: 15%;
  left: 10%;
}

.layer-b {
  background: #00c8ff;
  bottom: 15%;
  right: 10%;
}

/* Apply blend mode to layer-b */
.multiply   .layer-b { mix-blend-mode: multiply;   }
.screen     .layer-b { mix-blend-mode: screen;     }
.overlay    .layer-b { mix-blend-mode: overlay;    }
.difference .layer-b { mix-blend-mode: difference; }
.exclusion  .layer-b { mix-blend-mode: exclusion;  }
.hue        .layer-b { mix-blend-mode: hue;        }
.saturation .layer-b { mix-blend-mode: saturation; }
.luminosity .layer-b { mix-blend-mode: luminosity; }

/* Unique layer-b colors per mode for better visibility */
.hue        .layer-b { background: #ffd700; }
.saturation .layer-b { background: #ff6b6b; }
.luminosity .layer-b { background: #98ff98; }
.difference .layer-b { background: #ff8c00; }

.label {
  font-size: 0.78rem;
  color: #aaa;
  text-align: center;
  letter-spacing: 0.05em;
}

/* ---- background-blend-mode ---- */
.bg-blend-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.bg-blend-card {
  height: 140px;
  border-radius: 6px;
  display: flex;
  align-items: flex-end;
  padding: 10px 14px;
  font-size: 0.78rem;
  color: #fff;
}
.bg-blend-card span { background: rgba(0,0,0,0.5); padding: 2px 6px; border-radius: 3px; }

.bg-multiply {
  background:
    radial-gradient(circle at 40% 50%, #e84393 0%, transparent 60%),
    radial-gradient(circle at 60% 50%, #00c8ff 0%, transparent 60%),
    #1a1a2e;
  background-blend-mode: multiply;
}

.bg-screen {
  background:
    radial-gradient(circle at 40% 50%, #ff6b6b 0%, transparent 60%),
    radial-gradient(circle at 60% 50%, #ffd700 0%, transparent 60%),
    #0a0a1a;
  background-blend-mode: screen;
}

.bg-overlay {
  background:
    radial-gradient(circle at 40% 50%, #98ff98 0%, transparent 60%),
    radial-gradient(circle at 60% 50%, #e84393 0%, transparent 60%),
    #1a1a2e;
  background-blend-mode: overlay;
}

.bg-difference {
  background:
    radial-gradient(circle at 40% 50%, #ff8c00 0%, transparent 60%),
    radial-gradient(circle at 60% 50%, #00c8ff 0%, transparent 60%),
    #333;
  background-blend-mode: difference;
}