/* GEN Donald R. Keith Memorial Capstone Conference
   Palette and type sourced from the SDAC branding guide.
   Body/accent typeface (Jost) substitutes for the guide's licensed
   Termina/Brandon Grotesque, which aren't freely embeddable on the web. */

:root {
  --gold: #D5BA8C;
  --gold-dark: #B99A61;
  --gray: #B2B2B2;
  --black: #2D2A26;
  --charcoal: #3A362F;
  --bg: #F5F2EC;
  --white: #FFFFFF;

  --font-heading: 'Lora', Georgia, serif;
  --font-body: 'Jost', 'Segoe UI', system-ui, sans-serif;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-6: 3rem;
  --space-8: 4rem;

  --max-width: 1140px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--black);
  background: var(--bg);
  line-height: 1.6;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  color: var(--black);
  line-height: 1.2;
  margin: 0 0 var(--space-2);
}

h2 { font-size: 2rem; }
h3 { font-size: 1.15rem; }

p { margin: 0 0 var(--space-2); }

a { color: var(--gold-dark); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.eyebrow {
  font-family: var(--font-body);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.8rem;
  color: var(--gold-dark);
  margin-bottom: var(--space-1);
}

/* ---- Header / Nav ---- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 242, 236, 0.9);
  backdrop-filter: blur(6px);
  transition: box-shadow 0.2s ease, background 0.2s ease;
}

.site-header.scrolled {
  background: var(--bg);
  box-shadow: 0 2px 12px rgba(45, 42, 38, 0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}

.brand img {
  height: 44px;
  display: block;
}

.site-nav {
  display: flex;
  gap: var(--space-3);
}

.site-nav a {
  color: var(--black);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a.active {
  border-bottom-color: var(--gold-dark);
  color: var(--gold-dark);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--black);
  display: block;
}

/* ---- Hero ---- */

.hero {
  background-size: cover;
  background-position: center;
  color: var(--white);
  padding: var(--space-8) 0;
  min-height: 60vh;
  display: flex;
  align-items: center;
}

.hero h1 {
  color: var(--white);
  font-size: 2.6rem;
  max-width: 20ch;
}

.hero .eyebrow { color: var(--gold); }

.hero-tagline {
  font-size: 1.1rem;
  max-width: 55ch;
}

.hero-date {
  font-weight: 600;
  letter-spacing: 0.03em;
}

.hero-ctas {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
  flex-wrap: wrap;
}

/* ---- Buttons ---- */

.btn {
  display: inline-block;
  padding: 0.85rem 1.6rem;
  border-radius: 2px;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  transition: transform 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: var(--gold);
  color: var(--black);
}

.btn-primary:hover { background: var(--gold-dark); }

.btn-secondary {
  background: transparent;
  color: var(--white);
  border: 1px solid var(--white);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

.section .btn-secondary {
  color: var(--black);
  border-color: var(--black);
}

.section .btn-secondary:hover {
  background: rgba(45, 42, 38, 0.06);
}

/* ---- Stats strip ---- */

.stats-strip {
  background: var(--black);
  color: var(--white);
  padding: var(--space-4) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  text-align: center;
}

.stat-num {
  display: block;
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--gold);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--gray);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ---- Sections ---- */

.section {
  padding: var(--space-8) 0;
}

.section-alt {
  background: var(--white);
}

.about-grid,
.venue-grid,
.proceedings-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--space-6);
  align-items: center;
}

.about-image img,
.venue-media img,
.proceedings-media img {
  width: 100%;
  border-radius: 4px;
  display: block;
}

.venue-media {
  display: grid;
  gap: var(--space-2);
}

.venue-map {
  width: 100%;
  height: 260px;
  border: 0;
  border-radius: 4px;
}

/* ---- Namesake ---- */

.namesake-grid {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-6);
  align-items: start;
  max-width: 860px;
}

.namesake-portrait {
  width: 100%;
  border-radius: 4px;
  border: 3px solid var(--white);
  box-shadow: 0 4px 16px rgba(45, 42, 38, 0.18);
}

.namesake-dates {
  font-weight: 600;
  color: var(--gold-dark);
  margin-bottom: var(--space-3);
}

/* ---- Timeline ---- */

.no-late {
  display: inline-block;
  font-weight: 600;
  background: var(--gold);
  color: var(--black);
  padding: 0.4rem 0.9rem;
  border-radius: 2px;
  margin-bottom: var(--space-4);
}

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: var(--gray);
}

.timeline-item {
  position: relative;
  padding-left: var(--space-6);
  padding-bottom: var(--space-4);
}

.timeline-item:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: 0;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--gold);
  border: 2px solid var(--black);
}

.timeline-item-final .timeline-dot {
  background: var(--black);
}

.timeline-date {
  display: block;
  font-weight: 600;
  color: var(--gold-dark);
  margin-bottom: 0.2rem;
}

.timeline-content h3 { margin-bottom: 0.2rem; }
.timeline-content p { margin-bottom: 0; color: var(--charcoal); }

/* ---- Submit cards ---- */

.submit-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.submit-card {
  background: var(--white);
  border: 1px solid var(--gray);
  border-radius: 4px;
  padding: var(--space-3);
}

.submit-card h3 { font-size: 1rem; }
.submit-card p { font-size: 0.9rem; margin-bottom: 0; color: var(--charcoal); }

.section-alt .submit-card { background: var(--bg); }

/* ---- Spec table ---- */

.spec-table-wrap,
.table-wrap {
  overflow-x: auto;
  margin-bottom: var(--space-3);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
}

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 0.65rem var(--space-2);
  border-bottom: 1px solid var(--gray);
  font-size: 0.95rem;
}

.spec-table th {
  width: 220px;
  font-weight: 600;
  color: var(--black);
}

.template-ctas {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-2);
}

.template-hint {
  font-size: 0.9rem;
  color: var(--charcoal);
}

/* ---- Agenda table ---- */

.agenda-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

.agenda-table th,
.agenda-table td {
  text-align: left;
  padding: 0.75rem var(--space-2);
  border-bottom: 1px solid var(--bg);
}

.agenda-table th {
  background: var(--black);
  color: var(--white);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.agenda-table tr:nth-child(even) td {
  background: var(--bg);
}

/* ---- CTA section ---- */

.cta-section { background: var(--black); color: var(--white); }
.cta-inner { max-width: 640px; text-align: center; margin: 0 auto; }
.cta-inner h2 { color: var(--white); }

.cmt-attribution {
  margin-top: var(--space-3);
  font-size: 0.8rem;
  color: var(--gray);
  max-width: 60ch;
  margin-left: auto;
  margin-right: auto;
}

/* ---- Footer ---- */

.site-footer {
  background: var(--black);
  color: var(--gray);
  padding: var(--space-6) 0;
  text-align: center;
}

.footer-logo {
  height: 60px;
  margin-bottom: var(--space-3);
}

.site-footer a { color: var(--gold); }

.footer-year {
  margin-top: var(--space-3);
  font-size: 0.85rem;
  opacity: 0.8;
}

/* ---- Responsive ---- */

@media (max-width: 1023px) {
  .about-grid,
  .venue-grid,
  .proceedings-grid {
    grid-template-columns: 1fr;
  }

  .namesake-grid {
    grid-template-columns: 1fr;
  }

  .namesake-portrait {
    width: 140px;
  }

  .submit-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .nav-toggle { display: flex; }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: var(--space-2) var(--space-3);
    box-shadow: 0 8px 12px rgba(45, 42, 38, 0.1);
  }

  .site-nav.open { display: flex; }

  .hero h1 { font-size: 1.9rem; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }

  .submit-cards { grid-template-columns: 1fr; }

  .spec-table th { width: 150px; }

  /* Agenda table collapses to stacked cards */
  .agenda-table thead { display: none; }

  .agenda-table tr {
    display: block;
    margin-bottom: var(--space-2);
    border: 1px solid var(--gray);
    border-radius: 4px;
  }

  .agenda-table td {
    display: flex;
    justify-content: space-between;
    gap: var(--space-2);
    border-bottom: 1px solid var(--bg);
  }

  .agenda-table td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--charcoal);
  }
}