/* ============================================================
   Family of Minds — Shared Stylesheet
   Palette: near-black bg, warm white text, orange accent
   ============================================================ */

:root {
  --bg:           #0d0d0d;
  --surface:      #161616;
  --surface-2:    #1f1f1f;
  --border:       #2a2a2a;
  --text:         #e8e6e3;
  --text-muted:   #888888;
  --accent:       #e8720c;
  --accent-hover: #ff8f35;
  --font-sans:    'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', monospace;
  --max-w:        1100px;
  --radius:       6px;
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ── Typography ───────────────────────────────────────────── */
h1, h2, h3, h4 {
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); }
h3 { font-size: 1.15rem; }

p { color: var(--text); }
p + p { margin-top: 1rem; }

strong { color: var(--text); font-weight: 600; }

/* ── Layout ───────────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section { padding: 5rem 0; }

.section-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

/* ── Nav ──────────────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(13, 13, 13, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 60px;
}

.nav-logo {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}
.nav-logo span { color: var(--accent); }
.nav-logo:hover { color: var(--text); }

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-links a.active {
  color: var(--accent);
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background-color: var(--accent-hover);
  color: #fff;
}

.btn-outline {
  background-color: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Status Badge ─────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 99px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.badge-active   { background: rgba(232, 114, 12, 0.15); color: var(--accent); }
.badge-dev      { background: rgba(255,255,255,0.06);   color: var(--text-muted); }
.badge-planned  { background: rgba(255,255,255,0.04);   color: #555; }

/* ── Cards ────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.2s;
}
.card:hover { border-color: #3a3a3a; }

.card-featured {
  background: var(--surface);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 2.25rem;
}

/* ── Divider ──────────────────────────────────────────────── */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}
.footer-links a {
  color: var(--text-muted);
  font-size: 0.8rem;
}
.footer-links a:hover { color: var(--accent); }

/* ── Paper Cards (shared component — rendered by papers.js) ── */
.papers-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.paper-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 2rem;
  align-items: start;
  transition: border-color 0.2s;
}
.paper-card:hover  { border-color: #3a3a3a; }
.paper-card.featured { border-color: var(--accent); }
.paper-card.coming-soon { opacity: 0.45; pointer-events: none; }

.paper-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}
.paper-date { font-size: 0.78rem; color: var(--text-muted); }

.paper-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
  line-height: 1.3;
}
.paper-card .abstract {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 680px;
}

.paper-actions {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  min-width: 148px;
  align-items: stretch;
}
.paper-actions .btn { justify-content: center; text-align: center; }

/* Inline PDF viewer */
.pdf-viewer-wrap {
  display: none;
  margin-top: 1.5rem;
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  grid-column: 1 / -1;
}
.pdf-viewer-wrap iframe {
  width: 100%;
  height: 780px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #1a1a1a;
}
.pdf-viewer-note {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.6rem;
}

@media (max-width: 640px) {
  .paper-card { grid-template-columns: 1fr; }
  .paper-actions { flex-direction: row; min-width: auto; }
  .pdf-viewer-wrap iframe { height: 480px; }
}

/* ── Utilities ────────────────────────────────────────────── */
.text-muted  { color: var(--text-muted); }
.text-accent { color: var(--accent); }
.mt-1  { margin-top: 0.5rem; }
.mt-2  { margin-top: 1rem; }
.mt-3  { margin-top: 1.5rem; }
.mt-4  { margin-top: 2rem; }
.mb-1  { margin-bottom: 0.5rem; }
.mb-2  { margin-bottom: 1rem; }
.mb-3  { margin-bottom: 1.5rem; }
.mb-4  { margin-bottom: 2rem; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.flex  { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 640px) {
  .nav-links { gap: 1.2rem; }
  section { padding: 3.5rem 0; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}