/* ============================================================
   styles.css — GroundLM 2026
   Organised into sections matching the site structure.
   ============================================================ */

/* ── TOKENS ── */
:root {
  --navy:         #1a2744;
  --navy-dark:    #0f1a30;
  --accent:       #2e6fba;
  --accent-light: #4a8fd4;
  --accent-pale:  #e8f1fb;
  --gold:         #c8952a;
  --gold-light:   #f5e6c8;
  --text:         #1e2330;
  --text-muted:   #5a6175;
  --border:       #d8dde8;
  --bg:           #f9f9fb;
  --white:        #ffffff;
  --serif: 'Source Serif 4', Georgia, serif;
  --sans:  'IBM Plex Sans', system-ui, sans-serif;
  --mono:  'IBM Plex Mono', monospace;
  --radius:    6px;
  --shadow:    0 2px 12px rgba(26,39,68,0.08);
  --shadow-md: 0 4px 24px rgba(26,39,68,0.12);
}

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--sans); color: var(--text); background: var(--bg); line-height: 1.65; }

/* ── ANNOUNCEMENT BAR ── */
.ann-bar {
  background: var(--navy);
  color: #c8d8f0;
  font-size: 0.82rem;
  text-align: center;
  padding: 8px 20px;
  letter-spacing: 0.01em;
}
.ann-bar strong { color: #fff; }
.ann-bar a { color: #80b8f0; text-decoration: none; border-bottom: 1px solid rgba(128,184,240,0.4); }
.ann-bar a:hover { color: #fff; }

/* ── HEADER / NAV ── */
header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}
.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.logo { display: flex; flex-direction: column; text-decoration: none; line-height: 1.2; }
.logo-name { font-family: var(--serif); font-size: 1.15rem; font-weight: 600; color: var(--navy); letter-spacing: -0.01em; }
.logo-sub  { font-size: 0.72rem; color: var(--text-muted); font-family: var(--mono); letter-spacing: 0.04em; }

nav { display: flex; align-items: center; gap: 2px; }
nav a {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: var(--radius);
  transition: color 0.15s, background 0.15s;
}
nav a:hover,
nav a.active { color: var(--accent); background: var(--accent-pale); }

.hamburger { display: none; cursor: pointer; flex-direction: column; gap: 5px; padding: 4px; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--navy); border-radius: 2px; }

/* ── HERO ── */
.hero {
  background: linear-gradient(160deg, var(--navy-dark) 0%, var(--navy) 60%, #1e3a6e 100%);
  color: #fff;
  padding: 72px 24px 60px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.025'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-inner { max-width: 860px; margin: 0 auto; position: relative; }
.hero-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: #80b8f0;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(128,184,240,0.3);
  border-radius: 3px;
  padding: 4px 12px;
  margin-bottom: 20px;
  text-transform: uppercase;
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  max-width: 700px;
}
.hero h1 em { font-style: italic; color: #90c8f8; }
.hero-subtitle {
  font-size: 1.05rem;
  color: #b0c8e8;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.hero-subtitle .sep { opacity: 0.4; }
.hero-desc { font-size: 1rem; color: #c0d4ec; max-width: 620px; line-height: 1.7; margin-bottom: 36px; }
.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }

/* ── BUTTONS ── */
.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: var(--radius);
  text-decoration: none;
  transition: all 0.15s;
  cursor: pointer;
  border: none;
}
.btn-primary { background: var(--accent-light); color: #fff; }
.btn-primary:hover { background: #3a80ca; transform: translateY(-1px); box-shadow: 0 4px 14px rgba(74,143,212,0.4); }
.btn-outline { background: transparent; color: #c0d4ec; border: 1px solid rgba(200,220,240,0.35); }
.btn-outline:hover { background: rgba(255,255,255,0.08); color: #fff; }

/* ── PAGE LAYOUT ── */
.page-body { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
section { padding: 60px 0; border-bottom: 1px solid var(--border); }
section:last-child { border-bottom: none; }

.section-header { margin-bottom: 36px; }
.section-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}
h2 {
  font-family: var(--serif);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: -0.015em;
  line-height: 1.25;
}

/* ── BADGES ── */
.badge {
  display: inline-block;
  font-size: 0.68rem;
  font-family: var(--mono);
  border-radius: 3px;
  padding: 1px 7px;
  margin-left: 8px;
  vertical-align: middle;
}
.badge-upcoming { background: var(--gold-light);  color: var(--gold);  border: 1px solid #e8c878; }
.badge-past     { background: #f0f0f0;             color: #888;         border: 1px solid #ddd; }
.badge-confirmed{ background: #e6f4ec;             color: #2a7a45;      border: 1px solid #a8d8b8; font-size: 0.65rem; margin-left: 0; }
.badge-tba      { background: #f5f5f5;             color: #888;         border: 1px solid #ddd;    font-size: 0.65rem; margin-left: 0; }

/* ── AT A GLANCE ── */
.glance-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.glance-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  box-shadow: var(--shadow);
}
.glance-card h3 {
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent-pale);
}
.glance-card ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.glance-card ul li {
  font-size: 0.88rem;
  color: var(--text-muted);
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}
.glance-card ul li::before { content: '→'; position: absolute; left: 0; color: var(--accent); font-size: 0.75rem; top: 1px; }

/* ── TOPICS ── */
.topics-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.topic-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── DATES TABLE ── */
.dates-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  font-size: 0.9rem;
}
.dates-table th {
  background: var(--navy);
  color: #c0d4ec;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: left;
  padding: 12px 20px;
}
.dates-table td { padding: 13px 20px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.dates-table tr:last-child td { border-bottom: none; }
.dates-table tr:hover td { background: var(--accent-pale); }
.dates-table .date-col { font-family: var(--mono); font-size: 0.82rem; color: var(--accent); white-space: nowrap; min-width: 140px; }

/* ── SPEAKERS ── */
.speakers-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.speaker-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 16px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s, transform 0.2s;
}
.speaker-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.speaker-avatar {
  width: 80px; height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-pale), #d0e8f8);
  margin: 0 auto 12px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 1.6rem; font-weight: 600; color: var(--accent);
  border: 2px solid var(--border);
  overflow: hidden;
}
.speaker-avatar img { width: 100%; height: 100%; object-fit: cover; }
.speaker-card h3 { font-family: var(--serif); font-size: 0.95rem; font-weight: 600; color: var(--navy); margin-bottom: 4px; line-height: 1.3; }
.speaker-affil { font-size: 0.77rem; color: var(--text-muted); margin-bottom: 8px; line-height: 1.4; }
.speaker-bio { font-size: 0.75rem; color: var(--text-muted); margin-top: 8px; line-height: 1.45; }

/* ── ORGANIZERS ── */
.organizers-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.organizer-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 12px;
  text-align: center;
  box-shadow: var(--shadow);
}
.organizer-avatar {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #e8eef8, #d0e0f0);
  margin: 0 auto 10px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 1.1rem; font-weight: 600; color: var(--navy);
  border: 2px solid var(--border);
  overflow: hidden;
}
.organizer-avatar img { width: 100%; height: 100%; object-fit: cover; }
.organizer-card h3 { font-size: 0.82rem; font-weight: 600; color: var(--navy); margin-bottom: 3px; line-height: 1.3; }
.organizer-affil { font-size: 0.72rem; color: var(--text-muted); }

/* ── PROGRAM ── */
.program-table {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.program-row { display: grid; grid-template-columns: 110px 1fr; border-bottom: 1px solid var(--border); }
.program-row:last-child { border-bottom: none; }
.program-time {
  font-family: var(--mono); font-size: 0.78rem; color: var(--accent);
  padding: 12px 16px 12px 0; white-space: nowrap;
  display: flex; align-items: center; padding-left: 16px;
}
.program-event {
  font-size: 0.88rem; color: var(--text);
  padding: 12px 16px;
  border-left: 3px solid var(--border);
}
.program-event strong { color: var(--navy); }
.program-event .speaker-tag { font-size: 0.78rem; color: var(--text-muted); margin-top: 2px; }
.type-talk   .program-event { border-left-color: var(--accent); }
.type-break  .program-event { border-left-color: var(--border); background: var(--bg); color: var(--text-muted); }
.type-panel  .program-event { border-left-color: var(--gold); }
.type-poster .program-event { border-left-color: #6c5ce7; }

/* ── CFP ── */
.cfp-body { max-width: 760px; }
.cfp-body p { color: var(--text-muted); margin-bottom: 16px; font-size: 0.93rem; line-height: 1.75; }
.cfp-body h3 { font-family: var(--serif); font-size: 1.05rem; font-weight: 600; color: var(--navy); margin: 24px 0 10px; }
.cfp-body ul { list-style: none; display: flex; flex-direction: column; gap: 7px; margin-bottom: 16px; }
.cfp-body ul li { font-size: 0.88rem; color: var(--text-muted); padding-left: 18px; position: relative; line-height: 1.55; }
.cfp-body ul li::before { content: '•'; position: absolute; left: 0; color: var(--accent); }
.cfp-body a { color: var(--accent); }

/* ── VENUE ── */
.venue-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
.venue-info p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 12px; line-height: 1.7; }
.venue-info h3 { font-family: var(--serif); font-size: 1.1rem; color: var(--navy); font-weight: 600; margin-bottom: 8px; }
.venue-info a { color: var(--accent); }
.venue-map {
  background: linear-gradient(135deg, #dce8f5, #c8dcf0);
  border-radius: 8px;
  border: 1px solid var(--border);
  height: 260px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
  color: var(--accent);
  font-family: var(--mono); font-size: 0.82rem;
}
.venue-map svg { opacity: 0.5; }

/* ── FAQ ── */
.faq-list { max-width: 760px; display: flex; flex-direction: column; gap: 8px; }
.faq-item { background: var(--white); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.faq-q {
  font-size: 0.92rem; font-weight: 600; color: var(--navy);
  padding: 16px 20px; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  user-select: none;
}
.faq-q:hover { background: var(--accent-pale); }
.faq-q::after { content: '+'; font-size: 1.2rem; color: var(--accent); line-height: 1; }
.faq-item.open .faq-q::after { content: '−'; }
.faq-a {
  font-size: 0.88rem; color: var(--text-muted);
  padding: 0 20px;
  max-height: 0; overflow: hidden;
  transition: max-height 0.25s ease, padding 0.25s ease;
  line-height: 1.7;
}
.faq-item.open .faq-a { max-height: 400px; padding: 0 20px 16px; }

/* ── FOOTER ── */
footer { background: var(--navy-dark); color: #8090b0; padding: 48px 24px 32px; font-size: 0.83rem; }
.footer-inner {
  max-width: 1100px; margin: 0 auto;
  display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 40px;
  padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,0.07);
}
.footer-brand .logo-name { color: #c0d4f0; font-size: 1.1rem; margin-bottom: 6px; }
.footer-brand .logo-sub  { color: #5a6a88; }
.footer-brand p { margin-top: 10px; font-size: 0.8rem; color: #6a7a98; line-height: 1.6; }
.footer-col h4 { font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; color: #6a7a98; margin-bottom: 12px; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 7px; }
.footer-col ul li a { color: #8090b0; text-decoration: none; transition: color 0.15s; }
.footer-col ul li a:hover { color: #c0d4f0; }
.footer-col h4 + h4 { margin-top: 20px; }
.footer-bottom {
  max-width: 1100px; margin: 20px auto 0;
  display: flex; justify-content: space-between; align-items: center;
  color: #4a5a72; font-size: 0.78rem; flex-wrap: wrap; gap: 8px;
}
.footer-bottom a { color: #6a7a98; text-decoration: none; }
.footer-bottom a:hover { color: #c0d4f0; }

/* ── UTILITIES ── */
.note { font-size: 0.83rem; color: var(--text-muted); margin-top: 14px; }
.note a { color: var(--accent); }
.mt-sm { margin-top: 18px; }

/* ── RESPONSIVE ── */
@media (max-width: 800px) {
  nav { display: none; }
  nav.open {
    display: flex; flex-direction: column;
    position: absolute; top: 60px; left: 0; right: 0;
    background: var(--white); border-bottom: 1px solid var(--border);
    padding: 12px; box-shadow: var(--shadow-md);
  }
  .hamburger { display: flex; }
  .glance-grid,
  .topics-grid,
  .speakers-grid { grid-template-columns: 1fr; }
  .organizers-grid { grid-template-columns: repeat(2, 1fr); }
  .venue-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 600px) {
  .hero { padding: 48px 20px 40px; }
  .hero h1 { font-size: 1.6rem; }
  .speakers-grid { grid-template-columns: repeat(2, 1fr); }
}