:root {
  color-scheme: light dark;
  --bg: #f0fafb;
  --ink: #0f2b3c;
  --accent: #0891b2;
  --accent-hover: #06b6d4;
  --card: #ffffff;
  --card-hover: #ecfeff;
  --border: #cffafe;
  --shadow: rgba(8, 145, 178, 0.08);
  --link-hover: rgba(8, 145, 178, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a1a1f;
    --ink: #e0f2f1;
    --accent: #22d3ee;
    --accent-hover: #67e8f9;
    --card: #0f2b33;
    --card-hover: #164e54;
    --border: #1e4046;
    --shadow: rgba(0, 0, 0, 0.4);
    --link-hover: rgba(34, 211, 238, 0.08);
  }
}

body {
  background: linear-gradient(160deg, var(--bg) 0%, #e0f7fa 50%, #f0fafb 100%);
}

@media (prefers-color-scheme: dark) {
  body {
    background: linear-gradient(160deg, #0a1a1f 0%, #0f2b33 50%, #0a1a24 100%);
  }
}

.card {
  border-radius: 20px;
  box-shadow: 0 20px 40px -10px var(--shadow);
  animation: fadeIn 500ms ease both;
}

h1 {
  background: linear-gradient(135deg, #0891b2 0%, #06b6d4 40%, #22d3ee 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  color: #6b9da8;
}

h2 {
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 12px;
}

h2:before,
h2:after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.link-card {
  border-radius: 14px;
  transition: all 200ms ease;
  position: relative;
  overflow: hidden;
  box-shadow: 3px 3px 0 var(--border);
}

.link-card:hover {
  border-color: var(--accent);
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--accent);
}

.link-card:before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  transform: scaleX(0);
  transition: transform 200ms ease;
  transform-origin: left;
}

.link-card:hover:before {
  transform: scaleX(1);
}

.link-icon {
  border-radius: 10px;
}

.link-content p {
  color: #6b9da8;
}

.boost-badge {
  background: none;
  color: var(--accent);
  opacity: 0.5;
  padding: 0;
  box-shadow: none;
}
.boost-badge:hover {
  opacity: 0.8;
}

.info-section summary {
  color: #6b9da8;
  transition: color 200ms;
}

.info-section summary:hover {
  color: var(--accent);
}

.info-section ul {
  color: #6b9da8;
}

.info-section code {
  color: var(--accent);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.98);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}