:root {
  --bg: #0c0d10;
  --bg-soft: #131419;
  --card: #16171d;
  --card-hover: #1c1e26;
  --line: #262833;
  --text: #e8e9ed;
  --muted: #8b8d99;
  --faint: #5a5c68;
  --accent: #5eead4;
  --accent-warm: #fbbf77;
  --radius: 14px;
  --maxw: 1080px;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Space Grotesk", system-ui, -apple-system, Segoe UI, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(94, 234, 212, 0.07), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(251, 191, 119, 0.05), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* subtle film grain so the dark surface isn't flat */
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(12, 13, 16, 0.7);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand { font-family: var(--mono); font-size: 0.95rem; letter-spacing: -0.01em; }
.brand .prompt { color: var(--accent); }
.brand-name { color: var(--text); font-weight: 500; }
.brand-path { color: var(--muted); }
.top-nav { display: flex; gap: 22px; }
.top-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.18s ease;
}
.top-nav a:hover { color: var(--accent); }

/* Hero */
.hero { padding: 72px 0 40px; max-width: 640px; }
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  line-height: 1.05;
  margin: 0 0 18px;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #fff 30%, var(--accent) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede { color: var(--muted); font-size: 1.08rem; margin: 0; }
.lede a { color: var(--accent); text-decoration: none; border-bottom: 1px solid transparent; }
.lede a:hover { border-bottom-color: var(--accent); }

/* Controls */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}
.search { flex: 1 1 240px; }
.search input {
  width: 100%;
  padding: 11px 16px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.search input::placeholder { color: var(--faint); }
.search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(94, 234, 212, 0.12);
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 8px 14px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.16s ease;
}
.chip:hover { color: var(--text); border-color: var(--faint); }
.chip[aria-selected="true"] {
  background: var(--accent);
  color: #062019;
  border-color: var(--accent);
  font-weight: 500;
}

/* Grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 18px;
  padding-bottom: 80px;
}
.card {
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-warm));
  opacity: 0;
  transition: opacity 0.2s ease;
}
.card:hover {
  transform: translateY(-3px);
  border-color: #34384a;
  background: var(--card-hover);
}
.card:hover::before { opacity: 1; }

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.card-title { font-size: 1.18rem; font-weight: 600; letter-spacing: -0.01em; }
.card-stars {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent-warm);
  white-space: nowrap;
}
.card-desc { color: var(--muted); font-size: 0.92rem; margin: 0 0 16px; flex: 1; }

.card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.lang { display: inline-flex; align-items: center; gap: 6px; font-family: var(--mono); font-size: 0.76rem; color: var(--muted); }
.lang-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--faint); }
.tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--faint);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  padding: 2px 8px;
  border-radius: 6px;
}

.card-links { display: flex; gap: 10px; margin-top: auto; }
.btn {
  flex: 1;
  text-align: center;
  font-size: 0.82rem;
  font-family: var(--mono);
  padding: 9px 12px;
  border-radius: 9px;
  text-decoration: none;
  border: 1px solid var(--line);
  color: var(--muted);
  transition: all 0.16s ease;
}
.btn:hover { color: var(--text); border-color: var(--faint); background: var(--bg-soft); }
.btn-live {
  border-color: rgba(94, 234, 212, 0.4);
  color: var(--accent);
}
.btn-live:hover { background: rgba(94, 234, 212, 0.1); border-color: var(--accent); color: var(--accent); }

.empty { text-align: center; color: var(--faint); font-family: var(--mono); padding: 60px 0; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--faint);
  font-size: 0.85rem;
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.site-footer .dot { color: var(--line); }

/* Language colors */
.lang-Python .lang-dot { background: #3572A5; }
.lang-Java .lang-dot { background: #b07219; }
.lang-CSS .lang-dot { background: #563d7c; }
.lang-Swift .lang-dot { background: #F05138; }
.lang-Csharp .lang-dot { background: #178600; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  html { scroll-behavior: auto; }
}