ferrosite 0.1.0

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background:
    radial-gradient(circle at top left, rgba(180, 83, 9, 0.10), transparent 26rem),
    radial-gradient(circle at top right, rgba(15, 118, 110, 0.12), transparent 24rem),
    var(--color-bg);
}

img { max-width: 100%; display: block; }
a { color: inherit; }

.container {
  width: min(100% - 2rem, var(--container-max));
  margin: 0 auto;
}

.site-shell {
  padding: 1rem;
}

.site-frame {
  min-height: calc(100vh - 2rem);
  background: rgba(255, 253, 248, 0.9);
  border: 1px solid rgba(214, 208, 196, 0.9);
  border-radius: 28px;
  box-shadow: 0 18px 60px rgba(31, 41, 55, 0.08);
  overflow: hidden;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 253, 248, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(214, 208, 196, 0.8);
}

.header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 700;
}

.brand-mark {
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: #1f2937;
  color: #f6f3ec;
  font-size: 1.2rem;
}

.brand-copy {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1rem;
  letter-spacing: -0.03em;
}

.brand-subtitle {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-family: var(--font-sans);
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.nav-link,
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 2.8rem;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
}

.nav-link {
  color: var(--color-text-muted);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-text);
  background: rgba(31, 41, 55, 0.06);
}

.button-link {
  border: 1px solid transparent;
}

.button-link.primary {
  background: var(--color-primary);
  color: #fffaf0;
}

.button-link.primary:hover {
  background: var(--color-primary-dark);
}

.button-link.secondary {
  border-color: var(--color-border);
  background: rgba(255, 255, 255, 0.6);
}

.button-link.secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

.page-content {
  padding: 2.25rem 0 3rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 1.5rem;
  align-items: stretch;
  margin-bottom: 1.5rem;
}

.hero-copy,
.hero-side,
.surface-card,
.detail-card,
.article-shell,
.empty-state {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  box-shadow: 0 10px 30px rgba(31, 41, 55, 0.05);
}

.hero-copy {
  padding: clamp(1.5rem, 4vw, 3.25rem);
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 1rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(180, 83, 9, 0.1);
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero-title,
.section-title,
.page-title,
.article-title {
  font-family: var(--font-heading);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.hero-title {
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  max-width: 12ch;
}

.hero-subhead {
  margin: 1rem 0 0;
  max-width: 42rem;
  color: var(--color-text-muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
}

.prose,
.article-body {
  color: var(--color-text);
}

.prose p,
.article-body p,
.article-body ul,
.article-body ol,
.article-body pre,
.article-body blockquote,
.article-body h2,
.article-body h3 {
  margin: 0 0 1rem;
}

.article-body h2,
.article-body h3 {
  font-family: var(--font-heading);
  letter-spacing: -0.03em;
}

.article-body ul,
.article-body ol {
  padding-left: 1.2rem;
}

.article-body code,
.code-card code {
  font-family: var(--font-mono);
}

.hero-actions,
.resource-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.hero-side {
  padding: 1.25rem;
  display: grid;
  gap: 1rem;
  align-content: start;
  background:
    linear-gradient(160deg, rgba(15, 118, 110, 0.09), transparent 40%),
    var(--color-surface);
}

.metric-grid,
.feature-grid,
.resource-grid,
.project-grid {
  display: grid;
  gap: 1rem;
}

.metric-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0 0 1.5rem;
}

.metric-card,
.feature-card,
.resource-card,
.project-card {
  padding: 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
}

.metric-value {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  letter-spacing: -0.05em;
}

.metric-label,
.card-meta,
.muted {
  color: var(--color-text-muted);
}

.section {
  margin-top: 1.5rem;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section-title,
.page-title,
.article-title {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.section-copy,
.page-subtitle,
.article-lead {
  color: var(--color-text-muted);
  max-width: 45rem;
}

.feature-grid,
.resource-grid,
.project-grid {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.feature-card h3,
.resource-card h3,
.project-card h3 {
  margin: 0 0 0.7rem;
  font-family: var(--font-heading);
  letter-spacing: -0.03em;
}

.feature-icon {
  display: inline-flex;
  margin-bottom: 0.7rem;
  font-size: 1.3rem;
}

.code-card {
  padding: 1.2rem;
  border-radius: 24px;
  border: 1px solid #2f3a4b;
  background: var(--color-code-bg);
  color: #f9fafb;
}

.code-card pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.95rem;
}

.project-card {
  text-decoration: none;
  color: inherit;
}

.project-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.stack-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.9rem;
}

.stack-tag {
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: rgba(31, 41, 55, 0.06);
  font-size: 0.82rem;
}

.page-header {
  margin-bottom: 1rem;
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(260px, 0.9fr);
  gap: 1rem;
}

.article-shell {
  padding: clamp(1.25rem, 3vw, 2rem);
}

.detail-card {
  padding: 1.25rem;
  align-self: start;
  position: sticky;
  top: calc(var(--header-height) + 1rem);
}

.detail-list {
  display: grid;
  gap: 0.8rem;
}

.detail-list strong {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.footer {
  margin-top: 2rem;
  padding: 0 0 1.5rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.empty-state {
  padding: 1.4rem;
}

@media (max-width: 900px) {
  .hero,
  .detail-layout,
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .site-shell {
    padding: 0;
  }

  .site-frame {
    min-height: 100vh;
    border-radius: 0;
    border-inline: 0;
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 1rem 0;
  }

  .site-nav {
    margin-left: 0;
  }
}