/* ============================================================
   Building National Research Data Infrastructure — Site Styles
   ============================================================ */

:root {
  --navy: #1a2744;
  --blue: #2563eb;
  --blue-light: #dbeafe;
  --blue-mid: #93c5fd;
  --teal: #0d9488;
  --teal-light: #ccfbf1;
  --slate: #475569;
  --slate-light: #f8fafc;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-light: #64748b;
  --white: #ffffff;
  --amber: #f59e0b;
  --amber-light: #fef3c7;
  --rose: #e11d48;
  --rose-light: #ffe4e6;
  --green: #16a34a;
  --green-light: #dcfce7;
  --purple: #7c3aed;
  --purple-light: #ede9fe;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  background: var(--white);
}

/* --- Header --- */
.site-header {
  background: var(--navy);
  color: var(--white);
  padding: 2.5rem 2rem;
  text-align: center;
}
.header-inner { max-width: 900px; margin: 0 auto; }
.site-title {
  color: var(--white);
  text-decoration: none;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: block;
}
.site-tagline {
  color: var(--blue-mid);
  font-size: 1rem;
  font-weight: 300;
  margin-top: 0.5rem;
}

/* --- Navigation --- */
.site-nav {
  background: var(--white);
  border-bottom: 2px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav-inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  gap: 0;
  overflow-x: auto;
}
.nav-link {
  padding: 0.85rem 1.25rem;
  color: var(--slate);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: all 0.15s;
}
.nav-link:hover { color: var(--blue); border-bottom-color: var(--blue-light); }
.nav-link.active { color: var(--blue); border-bottom-color: var(--blue); }

/* --- Content --- */
.site-content { max-width: 900px; margin: 0 auto; padding: 2.5rem 2rem 4rem; }
.content-inner { max-width: 100%; }

h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--navy);
  margin: 2.5rem 0 1rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
h1:first-child { margin-top: 0; }

h2 {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--navy);
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--blue-light);
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--slate);
  margin: 1.5rem 0 0.5rem;
}

p { margin-bottom: 1rem; }

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

ul, ol { margin: 0.5rem 0 1.25rem 1.5rem; }
li { margin-bottom: 0.35rem; }

blockquote {
  border-left: 4px solid var(--blue);
  background: var(--slate-light);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  border-radius: 0 6px 6px 0;
  font-style: italic;
  color: var(--slate);
}

code {
  background: var(--slate-light);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

hr {
  border: none;
  border-top: 2px solid var(--border);
  margin: 2.5rem 0;
}

/* --- Tables --- */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0;
  font-size: 0.92rem;
}
th {
  background: var(--navy);
  color: var(--white);
  font-weight: 600;
  text-align: left;
  padding: 0.7rem 1rem;
}
td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
tr:nth-child(even) td { background: var(--slate-light); }

/* --- Custom Components --- */

/* Info boxes */
.box {
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  border-left: 5px solid;
}
.box-blue { background: var(--blue-light); border-color: var(--blue); }
.box-teal { background: var(--teal-light); border-color: var(--teal); }
.box-amber { background: var(--amber-light); border-color: var(--amber); }
.box-rose { background: var(--rose-light); border-color: var(--rose); }
.box-green { background: var(--green-light); border-color: var(--green); }
.box-purple { background: var(--purple-light); border-color: var(--purple); }
.box strong { display: block; margin-bottom: 0.4rem; }

/* Phase cards */
.phase-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.75rem;
  margin: 1.5rem 0;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.phase-card h3 {
  color: var(--blue);
  margin-top: 0;
  font-size: 1.15rem;
}
.phase-number {
  display: inline-block;
  background: var(--blue);
  color: var(--white);
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  text-align: center;
  line-height: 2rem;
  font-weight: 700;
  font-size: 0.9rem;
  margin-right: 0.5rem;
  vertical-align: middle;
}

/* Pillar cards */
.pillar {
  background: var(--white);
  border: 1px solid var(--border);
  border-top: 4px solid var(--blue);
  border-radius: 8px;
  padding: 1.5rem;
  margin: 1rem 0;
}
.pillar h3 { color: var(--blue); margin-top: 0; }

/* Timeline */
.timeline-item {
  position: relative;
  padding-left: 2.5rem;
  padding-bottom: 2rem;
  border-left: 3px solid var(--blue-light);
  margin-left: 0.5rem;
}
.timeline-item:last-child { border-left-color: transparent; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 0.25rem;
  width: 14px;
  height: 14px;
  background: var(--blue);
  border-radius: 50%;
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--blue);
}
.timeline-item h3 { margin-top: 0; color: var(--navy); }
.timeline-date {
  font-size: 0.85rem;
  color: var(--text-light);
  font-weight: 500;
  margin-bottom: 0.35rem;
}

/* Key outcome banner */
.outcome-banner {
  background: linear-gradient(135deg, var(--navy) 0%, #2d4a7c 100%);
  color: var(--white);
  padding: 2rem;
  border-radius: 10px;
  margin: 1.5rem 0;
  text-align: center;
}
.outcome-banner p { color: rgba(255,255,255,0.9); margin: 0; }
.outcome-banner strong { font-size: 1.1rem; }

/* Grid */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1rem 0;
}

/* Hero stats */
.stats-row {
  display: flex;
  gap: 1rem;
  margin: 1.5rem 0;
  flex-wrap: wrap;
}
.stat {
  flex: 1;
  min-width: 140px;
  background: var(--slate-light);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
}
.stat-number {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--blue);
  display: block;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 0.25rem;
}

/* --- Footer --- */
.site-footer {
  background: var(--slate-light);
  border-top: 2px solid var(--border);
  padding: 2rem;
  text-align: center;
  color: var(--text-light);
  font-size: 0.9rem;
}
.footer-inner { max-width: 900px; margin: 0 auto; }
.footer-meta { margin-top: 0.5rem; font-size: 0.8rem; }

/* --- SVG diagrams --- */
.diagram-container {
  margin: 2rem 0;
  text-align: center;
}
.diagram-container svg {
  max-width: 100%;
  height: auto;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .site-header { padding: 1.5rem 1rem; }
  .site-title { font-size: 1.35rem; }
  .site-content { padding: 1.5rem 1rem 3rem; }
  h1 { font-size: 1.6rem; }
  .grid-2 { grid-template-columns: 1fr; }
  .stats-row { flex-direction: column; }
  .nav-link { padding: 0.7rem 0.9rem; font-size: 0.8rem; }
}