/* VertRule Research Space — minimal, dark-first, brand-aligned */

:root {
  --charcoal: #1a1a1a;
  --deep-slate: #0f1419;
  --surface: #f5f5f5;
  --surface-dim: rgba(245, 245, 245, 0.4);
  --surface-faint: rgba(245, 245, 245, 0.06);
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.18);
  --lime: #b4f00d;
  --lime-dim: #9bd00b;
  --bar-width: 7px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--deep-slate);
  color: var(--surface);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--lime);
  text-decoration: none;
}

a:hover {
  color: var(--lime-dim);
}

code, .mono {
  font-family: "Fira Code", "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.85em;
}

.container {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero */
.hero {
  background: var(--deep-slate);
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--border);
}

.hero-title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 16px;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.bar {
  display: inline-block;
  width: var(--bar-width);
  height: 32px;
  background: var(--lime);
}

.hero-subtitle {
  color: var(--surface-dim);
  max-width: 560px;
  font-size: 14px;
}

/* Section headers */
.section {
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
}

.section-charcoal {
  background: var(--charcoal);
}

.eyebrow {
  color: var(--surface-dim);
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0 0 20px;
}

/* Cards */
.card-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.card {
  display: block;
  border: 1px solid var(--border);
  background: var(--surface-faint);
  border-radius: 8px;
  overflow: hidden;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  border-color: var(--border-strong);
}

.card-link {
  display: block;
  padding: 20px 24px 16px;
  color: inherit;
  text-decoration: none;
}

.card-link:hover {
  background: rgba(255, 255, 255, 0.03);
  color: inherit;
}

.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 6px;
}

.card-title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
}

.card-subtitle {
  color: var(--surface-dim);
  font-size: 13px;
  margin: 0 0 8px;
}

.card-desc {
  color: var(--surface-dim);
  font-size: 13px;
  margin: 0;
  line-height: 1.6;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px 14px;
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.18);
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: 11px;
  color: var(--surface-dim);
  flex-wrap: wrap;
}

.meta-link {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  color: var(--lime);
  background: rgba(180, 240, 13, 0.04);
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: 11px;
  text-decoration: none;
  transition: background-color 0.12s ease, border-color 0.12s ease,
    color 0.12s ease;
}

.meta-link:hover {
  background: rgba(180, 240, 13, 0.12);
  border-color: var(--lime);
  color: var(--lime);
}

.meta-link::before {
  content: "→";
  margin-right: 6px;
  opacity: 0.6;
}

.digest {
  margin-left: auto;
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: 10px;
  color: var(--surface-dim);
  word-break: break-all;
}

/* Status badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 3px;
  border: 1px solid;
  white-space: nowrap;
}

.badge-public {
  color: var(--lime);
  border-color: var(--lime);
  background: rgba(180, 240, 13, 0.06);
}

.badge-experimental {
  color: #f0a020;
  border-color: #f0a020;
  background: rgba(240, 160, 32, 0.06);
}

/* Empty state */
.empty {
  padding: 40px 24px;
  text-align: center;
  color: var(--surface-dim);
  border: 1px dashed var(--border);
  border-radius: 8px;
}

/* Footer */
.footer {
  background: var(--charcoal);
  border-top: 1px solid var(--border);
  padding: 40px 0 56px;
  color: var(--surface-dim);
  font-size: 12px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}

@media (max-width: 720px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

.footer-block {
  border-left: 2px solid var(--lime);
  padding-left: 16px;
}

.footer-eyebrow {
  margin: 0 0 8px;
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--surface);
}

.footer-line {
  margin: 0 0 4px;
  font-size: 12px;
  line-height: 1.5;
}

.footer-line a {
  color: var(--lime);
}

.footer-dim {
  color: var(--surface-dim);
}