/* Carbon Zero House — site styles */

:root {
  --ink: #111;
  --paper: #fafafa;
  --card: #ffffff;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #1a4d3a;
  --accent-soft: #e8efe9;
  --warn: #b45309;
  --warn-soft: #fef3c7;
  --max: 920px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.site-header-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand:hover { text-decoration: none; }
.brand .dot { color: var(--accent); }
.nav-links {
  display: flex;
  gap: 18px;
  font-size: 14px;
  flex-wrap: wrap;
}
.nav-links a { color: var(--ink); }
.nav-links a.active { color: var(--accent); font-weight: 600; }
.nav-cta {
  background: var(--accent);
  color: var(--card);
  padding: 7px 14px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
}
.nav-cta:hover { background: #133a2c; text-decoration: none; color: var(--card); }

/* Main */
main {
  flex: 1;
  max-width: var(--max);
  width: 100%;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

h1 { font-size: 28px; line-height: 1.25; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 20px; line-height: 1.3; margin: 32px 0 10px; }
h3 { font-size: 16px; line-height: 1.3; margin: 24px 0 8px; }
p { margin: 0 0 14px; }
.lead { font-size: 17px; color: var(--muted); margin: 0 0 24px; }

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px 22px;
  margin: 0 0 16px;
}
.card h3 { margin-top: 0; }
.card-link {
  display: block;
  color: var(--ink);
}
.card-link:hover {
  text-decoration: none;
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(26, 77, 58, 0.08);
}
.card-meta {
  font-size: 13px;
  color: var(--muted);
  margin-top: 8px;
}

.grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

/* Status pill */
.pill {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
}
.pill.warn {
  background: var(--warn-soft);
  color: var(--warn);
}
.pill.muted {
  background: var(--line);
  color: var(--muted);
}

/* Banner (caveat / disclaimers) */
.banner {
  background: var(--warn-soft);
  border: 1px solid #fcd34d;
  color: #78350f;
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 14px;
  margin: 0 0 24px;
}
.banner strong { color: #422006; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: var(--card);
  font-size: 13px;
  color: var(--muted);
}
.site-footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 22px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
}
.site-footer a { color: var(--muted); }
.site-footer-copy { max-width: 540px; }

/* Forms */
input, textarea, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 4px;
  font: inherit;
  margin-bottom: 10px;
  font-size: 16px;
  background: var(--card);
}
input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: transparent;
}
button, .btn {
  display: inline-block;
  background: var(--accent);
  color: var(--card);
  border: 0;
  padding: 10px 18px;
  border-radius: 4px;
  cursor: pointer;
  font: inherit;
  font-weight: 500;
  min-height: 38px;
  text-decoration: none;
}
button:hover, .btn:hover { background: #133a2c; color: var(--card); text-decoration: none; }
button:disabled { opacity: 0.5; cursor: default; }

/* Inline code */
code {
  background: var(--line);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 0.92em;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: 14px; margin: 8px 0 20px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--paper); font-weight: 600; }

/* Mobile */
@media (max-width: 600px) {
  .site-header-inner { flex-wrap: wrap; gap: 10px; }
  .nav-links { gap: 12px; font-size: 13px; }
  h1 { font-size: 24px; }
  main { padding: 22px 16px 50px; }
  .card { padding: 16px 18px; }
}