/* =========================================
   AGENT4SC Workshop Website Styles
   ========================================= */

:root {
  --primary: #e8e8e8;
  --accent: #e05a1e;
  --accent-light: #f07840;
  --light-bg: #111111;
  --border: #2a2a2a;
  --text: #d0d0d0;
  --text-muted: #7a7a7a;
  --white: #161616;
  --section-pad: 80px 0;
  --radius: 8px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  --transition: 0.25s ease;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-light); }

img { max-width: 100%; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- NAV ---- */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(26, 58, 92, 0.97);
  backdrop-filter: blur(8px);
  padding: 0;
  transition: box-shadow var(--transition);
}
#navbar.scrolled { box-shadow: 0 2px 16px rgba(0,0,0,0.25); }

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.04em;
}
.nav-logo span { color: var(--accent-light); }

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}
.nav-links a {
  color: rgba(255,255,255,0.85);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--accent-light); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ---- HERO ---- */
#hero {
  background: linear-gradient(135deg, #0d2440 0%, #1a3a5c 55%, #1e4a78 100%);
  color: var(--white);
  padding: 140px 0 90px;
  text-align: center;
  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='0.03'%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-badge {
  display: inline-block;
  background: rgba(224, 90, 30, 0.25);
  border: 1px solid rgba(224, 90, 30, 0.5);
  color: #f9b08a;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
}

#hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}
#hero h1 .highlight { color: var(--accent-light); }

#hero .subtitle {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.75);
  max-width: 680px;
  margin: 0 auto 36px;
}

.hero-meta {
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 42px;
}
.hero-meta-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.hero-meta-item .label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.5);
  font-weight: 600;
}
.hero-meta-item .value {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--accent-light);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(224, 90, 30, 0.4);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,0.45);
}
.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.08);
  color: var(--white);
  transform: translateY(-2px);
}

/* ---- SECTIONS ---- */
section { padding: var(--section-pad); }
section:nth-of-type(even) { background: var(--light-bg); }

.section-header {
  text-align: center;
  margin-bottom: 56px;
}
.section-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}
.section-header h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 750;
  color: var(--primary);
  letter-spacing: -0.01em;
}
.divider {
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin: 16px auto 0;
}

/* ---- ABOUT ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.about-text p { margin-bottom: 16px; color: var(--text-muted); font-size: 1rem; }
.about-text p:last-child { margin-bottom: 0; }

.about-highlights {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.highlight-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow);
}
.highlight-card h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}
.highlight-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

/* ---- TOPICS ---- */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.topic-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 22px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 28px rgba(26, 58, 92, 0.14);
}
.topic-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  font-size: 1.2rem;
}
.topic-card h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  line-height: 1.4;
}
.topic-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin: 0;
}

/* ---- CFP ---- */
.cfp-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 48px;
  align-items: start;
}

.cfp-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin: 28px 0 12px;
}
.cfp-content h3:first-child { margin-top: 0; }
.cfp-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 14px;
}
.cfp-content ul {
  list-style: none;
  padding: 0;
  margin-bottom: 14px;
}
.cfp-content ul li {
  color: var(--text-muted);
  font-size: 0.92rem;
  padding: 6px 0 6px 22px;
  position: relative;
}
.cfp-content ul li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.4;
}

.paper-formats {
  display: flex;
  gap: 16px;
  margin: 20px 0;
}
.format-card {
  flex: 1;
  background: var(--light-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
}
.format-card .pages {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.format-card .type {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin: 4px 0 6px;
}
.format-card .desc {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Timeline sidebar */
.timeline-card {
  background: var(--primary);
  color: var(--white);
  border-radius: var(--radius);
  padding: 30px 28px;
  position: sticky;
  top: 80px;
}
.timeline-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--white);
}
.timeline-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.timeline-item:last-child { border-bottom: none; padding-bottom: 0; }
.timeline-item:first-child { padding-top: 0; }
.timeline-item .event {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.65);
  font-weight: 500;
}
.timeline-item .date {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--accent-light);
}
.timeline-cta {
  margin-top: 24px;
  display: block;
  text-align: center;
  background: var(--accent);
  color: var(--white) !important;
  padding: 12px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  font-weight: 600;
  transition: background var(--transition);
}
.timeline-cta:hover { background: var(--accent-light); }

/* ---- SCHEDULE ---- */
.schedule-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.schedule-table th {
  background: var(--primary);
  color: var(--white);
  padding: 14px 20px;
  text-align: left;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.schedule-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  vertical-align: top;
}
.schedule-table tr:last-child td { border-bottom: none; }
.schedule-table tr:hover td { background: var(--light-bg); }
.time-cell {
  white-space: nowrap;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  width: 130px;
}
.type-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 9px;
  border-radius: 100px;
  margin-left: 8px;
}
.badge-paper { background: #e8f0f8; color: #1a3a5c; }
.badge-panel { background: #fde8dc; color: #b84210; }
.badge-break { background: #e8f8ec; color: #2a7a3b; }

/* ---- PEOPLE ---- */
.people-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}
.person-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
  transition: transform var(--transition);
}
.person-card:hover { transform: translateY(-3px); }
.person-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #3a6fa0);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.person-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.person-card .affiliation {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 10px;
}
.person-card .role-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 3px 10px;
  border-radius: 100px;
  background: #e8f0f8;
  color: var(--primary);
  margin-bottom: 12px;
}
.person-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.55;
}
.person-card .email {
  display: block;
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--accent);
}

/* Steering + PC */
.subsection-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
}
.steering-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}
.steering-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.steering-card h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.steering-card .affil {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.pc-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 24px;
}
.pc-item {
  font-size: 0.88rem;
  color: var(--text-muted);
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}
.pc-item strong {
  color: var(--text);
  font-weight: 600;
}

/* ---- PANELISTS ---- */
.panelists-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.panelist-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 16px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform var(--transition);
}
.panelist-card:hover { transform: translateY(-3px); }
.panelist-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2a5a8c, #1a3a5c);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--white);
  margin: 0 auto 14px;
}
.panelist-card h4 { font-size: 0.9rem; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.panelist-card .org { font-size: 0.76rem; color: var(--text-muted); }
.tentative-note {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 16px;
  font-style: italic;
}

/* ---- VENUE ---- */
.venue-banner {
  background: linear-gradient(135deg, var(--primary), #2a5a8c);
  color: var(--white);
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
}
.venue-banner h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.venue-banner p {
  color: rgba(255,255,255,0.75);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto 28px;
}
.venue-details {
  display: flex;
  gap: 40px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}
.venue-detail { display: flex; flex-direction: column; gap: 3px; }
.venue-detail .vd-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: rgba(255,255,255,0.5); font-weight: 600; }
.venue-detail .vd-val { font-size: 1rem; font-weight: 700; color: var(--white); }

/* ---- FOOTER ---- */
footer {
  background: #0d2440;
  color: rgba(255,255,255,0.6);
  padding: 40px 0;
  text-align: center;
  font-size: 0.85rem;
}
footer .footer-logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}
footer a { color: rgba(255,255,255,0.7); }
footer a:hover { color: var(--accent-light); }
.footer-links {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin: 14px 0;
}
footer .copy { margin-top: 16px; font-size: 0.78rem; }

/* ---- RESPONSIVE ---- */
@media (max-width: 900px) {
  .about-grid, .cfp-layout { grid-template-columns: 1fr; }
  .topics-grid { grid-template-columns: repeat(2, 1fr); }
  .people-grid { grid-template-columns: repeat(2, 1fr); }
  .steering-grid { grid-template-columns: repeat(2, 1fr); }
  .panelists-grid { grid-template-columns: repeat(3, 1fr); }
  .cfp-layout .timeline-card { position: static; }
}

@media (max-width: 640px) {
  :root { --section-pad: 56px 0; }
  #hero { padding: 110px 0 64px; }
  .topics-grid, .people-grid, .steering-grid, .panelists-grid { grid-template-columns: 1fr; }
  .pc-grid { grid-template-columns: 1fr; }
  .hero-meta { gap: 20px; }
  .paper-formats { flex-direction: column; }
  .venue-banner { padding: 32px 20px; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: #0a0a0a; padding: 16px 24px; gap: 12px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
}

/* =========================================
   DARK THEME OVERRIDES
   ========================================= */

/* Body & global */
body { background: #0a0a0a; }

/* Navbar */
#navbar { background: rgba(8, 8, 8, 0.97); }
.nav-logo { color: #f0f0f0; }
.nav-toggle span { background: #f0f0f0; }

/* Hero — dark background, white text throughout */
#hero { background: linear-gradient(135deg, #050505 0%, #0d0d0d 55%, #131313 100%); color: #ffffff; }
#hero h1 { color: #ffffff; }
#hero .subtitle { color: rgba(255, 255, 255, 0.7); }
.hero-meta-item .value { color: #ffffff; }
.hero-meta-item .label { color: rgba(255, 255, 255, 0.45); }

/* Buttons */
.btn-primary { color: #ffffff; }
.btn-primary:hover { color: #ffffff; }
.btn-outline { color: #e0e0e0; border-color: rgba(255, 255, 255, 0.3); }
.btn-outline:hover { color: #ffffff; border-color: #ffffff; background: rgba(255, 255, 255, 0.06); }

/* Avatars */
.person-avatar { background: linear-gradient(135deg, #2a2a2a, #3d3d3d); color: #ffffff; }
.panelist-avatar { color: #ffffff; }

/* Timeline sidebar */
.timeline-card { background: #131313; border: 1px solid #2a2a2a; color: #d0d0d0; }
.timeline-card h3 { color: #f0f0f0; }
.timeline-item .event { color: rgba(255, 255, 255, 0.5); }
.timeline-cta { color: #ffffff !important; }

/* Schedule table */
.schedule-table th { background: #1a1a1a; color: #d0d0d0; }
.badge-paper { background: #1a2535; color: #7aaace; }
.badge-panel { background: #2a1a0e; color: #e09060; }
.badge-break { background: #0d2014; color: #60a870; }

/* Role badge on person cards */
.person-card .role-badge { background: #252525; color: #b0b0b0; }

/* Venue banner — dark card with visible text */
.venue-banner {
  background: linear-gradient(135deg, #0d0d0d, #181818);
  border: 1px solid #2a2a2a;
  color: #e8e8e8;
}
.venue-banner h3 { color: #f0f0f0; }
.venue-banner p { color: rgba(255, 255, 255, 0.6); }
.venue-detail .vd-label { color: rgba(255, 255, 255, 0.4); }
.venue-detail .vd-val { color: #f0f0f0; }

/* Footer */
footer { background: #050505; }
footer .footer-logo { color: #f0f0f0; }