/* Hulusi build-log site — single-stylesheet, no build step */

:root {
  --walnut: #5a3818;
  --walnut-light: #8b5a2b;
  --gold: #bf9000;
  --pakka: #4d3320;
  --brass: #d4a937;
  --bg: #fff8ec;
  --paper: #fafafa;
  --text: #2a1810;
  --muted: #555;
  --rule: #d8cdb6;
  --link: #7c4a18;
  --link-hover: #bf9000;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.55;
}
a { color: var(--link); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color 0.15s; }
a:hover { border-bottom-color: var(--link-hover); color: var(--link-hover); }

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  padding: 4rem 5vw 3rem;
  background: linear-gradient(135deg, var(--bg) 0%, #f0e5cd 100%);
  border-bottom: 1px solid var(--rule);
}
@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; padding: 2rem 4vw; }
}
.hero-inner h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  margin: 0 0 0.5rem;
  color: var(--walnut);
  letter-spacing: -0.02em;
}
.hero-inner .tagline {
  font-size: 1.15rem;
  color: var(--muted);
  margin: 0 0 1rem;
  max-width: 32rem;
}
.hero-inner .meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
  font-style: italic;
}
.hero-inner .links a {
  display: inline-block;
  margin-right: 1.25rem;
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}
.hero-inner .links a.primary {
  background: var(--walnut);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  border: none;
}
.hero-inner .links a.primary:hover {
  background: var(--gold);
  color: white;
}
.hero-art {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero-art object {
  width: 100%;
  max-width: 400px;
  height: auto;
}
.hero-art .caption {
  font-size: 0.8rem;
  color: var(--muted);
  font-style: italic;
  margin: 0.5rem 0 0;
  text-align: center;
}

/* Main sections */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 5vw;
}
section {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--rule);
}
section:last-child { border-bottom: none; }
section h2 {
  font-size: 1.6rem;
  color: var(--walnut);
  margin: 0 0 1rem;
  letter-spacing: -0.01em;
}

/* Physics cards */
.physics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
}
.formula-card {
  background: var(--paper);
  padding: 1.25rem;
  border-radius: 6px;
  border: 1px solid var(--rule);
}
.formula-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  color: var(--walnut);
}
.formula-card code {
  display: block;
  background: white;
  padding: 0.5rem 0.75rem;
  border-radius: 3px;
  font-family: "SF Mono", Consolas, monospace;
  font-size: 0.95rem;
  margin: 0.5rem 0;
  border-left: 3px solid var(--gold);
}
.formula-card p { margin: 0.5rem 0 0; font-size: 0.88rem; color: var(--muted); }

/* Family table */
table.family {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  background: var(--paper);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--rule);
}
table.family th, table.family td {
  padding: 0.6rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--rule);
}
table.family th {
  background: var(--walnut);
  color: white;
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
table.family tr.standard { background: #fff2cc; }
table.family tr.standard td { font-weight: 500; }
table.family tr:last-child td { border-bottom: none; }

/* Drawings grid */
.drawings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}
.drawing-card {
  background: white;
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 1rem;
  display: block;
  border-bottom: 1px solid var(--rule); /* override hover */
  transition: transform 0.15s, box-shadow 0.15s;
}
.drawing-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(90, 56, 24, 0.1);
  border-bottom: 1px solid var(--rule);
  color: inherit;
}
.drawing-card object { width: 100%; height: 200px; pointer-events: none; }
.drawing-card p { margin: 0.5rem 0 0; font-size: 0.85rem; color: var(--muted); }

/* Prototype ladder */
ol.ladder { padding-left: 1.5rem; }
ol.ladder li { margin-bottom: 0.5rem; }

/* BOM */
.bom-summary ul {
  background: var(--paper);
  padding: 1rem 1.25rem 1rem 2.5rem;
  border-radius: 6px;
  border: 1px solid var(--rule);
}
.bom-summary li { margin-bottom: 0.25rem; }

/* Risks */
.risks-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.risk-card {
  background: var(--paper);
  padding: 1rem;
  border-radius: 6px;
  border-left: 4px solid var(--gold);
}
.risk-card.sev-high { border-left-color: #c62828; }
.risk-card.sev-med { border-left-color: #ef8c1c; }
.risk-card h3 { margin: 0 0 0.5rem; font-size: 0.95rem; color: var(--walnut); }
.risk-card p { margin: 0; font-size: 0.85rem; color: var(--muted); }

/* Code */
code {
  background: white;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-family: "SF Mono", Consolas, monospace;
  font-size: 0.9em;
  color: var(--walnut);
  border: 1px solid var(--rule);
}

/* Footer */
footer {
  background: var(--walnut);
  color: #f0e5cd;
  padding: 2rem 5vw;
  font-size: 0.85rem;
  margin-top: 2rem;
}
footer a { color: #ffd966; border-bottom-color: transparent; }
footer a:hover { color: white; }
footer p { margin: 0 0 0.75rem; max-width: 60rem; }