/* === Variables === */
:root {
  --bg: #f6f3eb;
  --ink: #1d2228;
  --muted: #5c6773;
  --line: #d7d2c8;
  --card: #fffdf8;
  --accent: #006d5b;
  --accent-light: #e6f5f1;
  --chip: #efe9db;
  --chip-active: #006d5b;
  --chip-active-text: #fff;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow-hero: 0 10px 30px rgba(0, 0, 0, 0.06);
  --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.05);
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  min-height: 100vh;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 10% 10%, rgba(255, 220, 100, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 90% 5%, rgba(100, 220, 230, 0.10) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { background: var(--chip); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }

/* === Hero === */
.hero {
  max-width: 1120px;
  margin: 32px auto 0;
  padding: 48px 40px;
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hero);
  text-align: center;
}

.hero-title {
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.hero-sub {
  color: var(--muted);
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
}

.stat {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
}

.btn-gh {
  display: inline-block;
  padding: 6px 20px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.9rem;
  transition: opacity 0.2s;
}
.btn-gh:hover { opacity: 0.85; text-decoration: none; }

.btn-skill {
  display: inline-block;
  padding: 6px 20px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.9rem;
  font-family: 'Courier New', monospace;
  transition: opacity 0.2s;
}
.btn-skill:hover { opacity: 0.85; text-decoration: none; }

/* === Layout === */
.layout {
  max-width: 1120px;
  margin: 24px auto 0;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  padding: 0 16px;
}

/* === Sidebar === */
.sidebar {
  position: sticky;
  top: 24px;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.search-box {
  display: flex;
  gap: 8px;
}

.search-box input {
  flex: 1;
  padding: 10px 14px;
  border: 2px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  background: var(--card);
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s;
}

.search-box input:focus { border-color: var(--accent); }

.clear-btn {
  padding: 10px 14px;
  border: 2px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--card);
  color: var(--muted);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.clear-btn:hover { border-color: var(--accent); color: var(--accent); }

.filter-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 8px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  display: inline-block;
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-pill);
  background: var(--chip);
  color: var(--ink);
  cursor: pointer;
  border: none;
  font-family: inherit;
  transition: all 0.15s;
}
.chip:hover { background: var(--line); }
.chip[aria-pressed="true"] {
  background: var(--chip-active);
  color: var(--chip-active-text);
}

/* === Results === */
.results-header {
  margin-bottom: 16px;
}

.results-info {
  font-size: 0.9rem;
  color: var(--muted);
  font-weight: 500;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.empty {
  text-align: center;
  color: var(--muted);
  font-size: 1.1rem;
  padding: 60px 0;
}

/* === Card === */
.card {
  background: var(--card);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 10px;
  transition: box-shadow 0.2s, transform 0.2s;
}
.card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.card-header { display: flex; gap: 8px; align-items: center; }

.badge {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.category-badge {
  background: var(--accent-light);
  color: var(--accent);
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card-desc {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.tag {
  font-size: 0.75rem;
  color: var(--muted);
  background: var(--chip);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 8px;
  border-top: 1px solid var(--line);
}

.card-date {
  font-size: 0.8rem;
  color: var(--muted);
}

.card-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
}

/* === Footer === */
.footer {
  max-width: 1120px;
  margin: 48px auto 32px;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  padding: 0 16px;
}

/* === Responsive === */
@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
  }
  .grid {
    grid-template-columns: 1fr;
  }
  .hero {
    margin: 16px;
    padding: 32px 24px;
  }
  .hero-title { font-size: 1.8rem; }
}