/* Fe2O3 site - dark starfield with rust accent */

:root {
  --rust: #f74c00;
  --rust-dark: #b7410e;
  --rust-glow: #ff7a3a;
  --bg: #0a0a14;
  --bg-elev: #161622;
  --bg-card: #1a1a2a;
  --fg: #e6e6ea;
  --fg-dim: #9aa0b0;
  --fg-mute: #6a7080;
  --cyan: #80dfff;
  --green: #4ade80;
  --yellow: #ffe9a8;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.55;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Starfield backdrop (CSS-only, no JS) */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(1px 1px at 20% 30%,  rgba(255,255,255,0.6), transparent 50%),
    radial-gradient(1px 1px at 60% 20%,  rgba(255,255,255,0.4), transparent 50%),
    radial-gradient(1px 1px at 80% 60%,  rgba(255,255,255,0.7), transparent 50%),
    radial-gradient(1px 1px at 30% 80%,  rgba(255,255,255,0.5), transparent 50%),
    radial-gradient(1px 1px at 70% 90%,  rgba(255,255,255,0.6), transparent 50%),
    radial-gradient(1px 1px at 90% 40%,  rgba(128,223,255,0.5), transparent 50%),
    radial-gradient(2px 2px at 10% 70%,  rgba(255,233,168,0.5), transparent 50%),
    radial-gradient(1px 1px at 50% 50%,  rgba(255,255,255,0.4), transparent 50%),
    radial-gradient(1200px 800px at 80% -10%, rgba(247,76,0,0.12), transparent 60%),
    radial-gradient(900px 600px at -10% 100%, rgba(128,223,255,0.08), transparent 60%);
  pointer-events: none;
  z-index: -1;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Hero */
.hero {
  padding: 6rem 0 4rem;
  text-align: center;
}

.hero-logo {
  width: 160px;
  height: 160px;
  margin: 0 auto 1.5rem;
  display: block;
  filter: drop-shadow(0 0 40px rgba(247, 76, 0, 0.45));
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffe9a8 0%, var(--rust) 50%, var(--cyan) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.5rem;
}

.hero .formula {
  font-family: "Times New Roman", serif;
  font-style: italic;
  font-size: 1.1em;
}
.hero .formula sub { font-size: 0.65em; }

.tagline {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--fg-dim);
  margin-bottom: 2rem;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.badges {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}
.badges img { height: 20px; }

.cta {
  display: inline-flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}
.cta a {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.15s, box-shadow 0.15s;
}
.cta a:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0,0,0,0.4); }
.cta .primary {
  background: linear-gradient(135deg, var(--rust), var(--rust-dark));
  color: white;
}
.cta .secondary {
  background: var(--bg-card);
  color: var(--fg);
  border: 1px solid #333;
}

/* Section headers */
section {
  padding: 4rem 0;
}
section h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--yellow);
}
section .section-intro {
  color: var(--fg-dim);
  max-width: 720px;
  margin-bottom: 2.5rem;
}

/* Grid of tool cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid #26263a;
  border-radius: 14px;
  padding: 1.5rem;
  transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--rust);
  box-shadow: 0 20px 50px rgba(247, 76, 0, 0.2);
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(200px 150px at 0% 0%, rgba(247, 76, 0, 0.08), transparent 70%);
  pointer-events: none;
}

.card-head {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.card-logo {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
  border-radius: 10px;
  background: #0a0a14;
}
.card-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--yellow);
  margin: 0;
}
.card-kind {
  font-size: 0.8rem;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.card-kind.lib { color: var(--cyan); }

.card-ruby {
  font-size: 0.78rem;
  color: var(--fg-mute);
  margin-top: 0.15rem;
}
.card-ruby a {
  color: #e2544a;  /* faint Ruby red */
  text-decoration: none;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
.card-ruby a:hover { text-decoration: underline; }

.card-desc {
  color: var(--fg);
  flex-grow: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: 0.5rem;
  padding-top: 0.75rem;
  border-top: 1px solid #26263a;
}
.card-meta img { height: 20px; }
.card-meta .repo {
  color: var(--fg-mute);
  font-size: 0.85rem;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
}

/* Install section */
.install pre {
  background: #05050a;
  border: 1px solid #26263a;
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  font-size: 0.92rem;
  color: #e6e6ea;
  line-height: 1.6;
}
.install pre .comment { color: var(--fg-mute); }
.install pre .cmd { color: var(--green); }

/* Features / why */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}
.feature {
  background: var(--bg-card);
  border-left: 3px solid var(--rust);
  border-radius: 6px;
  padding: 1.25rem;
}
.feature h3 {
  color: var(--rust-glow);
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
}
.feature p { color: var(--fg-dim); font-size: 0.95rem; }

/* Footer */
footer {
  padding: 3rem 0 4rem;
  text-align: center;
  color: var(--fg-mute);
  border-top: 1px solid #1a1a2a;
  margin-top: 4rem;
}
footer a { color: var(--rust-glow); text-decoration: none; }
footer a:hover { text-decoration: underline; }

@media (max-width: 600px) {
  .hero { padding: 4rem 0 2rem; }
  .card { padding: 1.25rem; }
  .card-head { flex-direction: column; text-align: center; }
}