:root {
  --bg: #0f1220;
  --bg-alt: #161a2e;
  --card: #1b2038;
  --text: #e8eaf6;
  --text-muted: #a6acc9;
  --accent: #7c9fff;
  --accent-soft: #3a4a8a;
  --border: #2a2f4a;
  --max-width: 900px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background: linear-gradient(180deg, var(--bg-alt), var(--bg));
  padding: 56px 0 32px;
  border-bottom: 1px solid var(--border);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  color: var(--accent);
  margin: 0 0 12px;
  font-weight: 600;
}

.site-header h1 {
  font-size: 1.9rem;
  line-height: 1.3;
  margin: 0 0 16px;
}

.byline {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}

.byline-text {
  flex-shrink: 1;
}

.authors {
  color: var(--text-muted);
  margin: 0 0 2px;
  font-size: 1rem;
}

.authors span {
  white-space: nowrap;
}

.affiliation {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 0;
}

.qiskit-logo {
  height: 44px;
  width: auto;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  padding-top: 20px;
}

.site-nav a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  opacity: 0.85;
}

.site-nav a:hover {
  color: var(--accent);
  opacity: 1;
}

main {
  padding: 48px 24px 24px;
}

section {
  margin-bottom: 56px;
}

section h2 {
  font-size: 1.4rem;
  margin-bottom: 16px;
  border-left: 3px solid var(--accent);
  padding-left: 12px;
}

.placeholder {
  color: var(--text-muted);
  font-style: italic;
}

.agenda-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
  background: var(--card);
  border-radius: 8px;
  overflow: hidden;
}

.agenda-table th,
.agenda-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.agenda-table th {
  background: var(--bg-alt);
  color: var(--text-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.speaker-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.speaker-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
}

.speaker-card h3 {
  margin: 0 0 4px;
  font-size: 1.1rem;
}

.speaker-affiliation {
  color: var(--accent);
  font-size: 0.85rem;
  margin: 0 0 12px;
}

.speaker-card p:not(.speaker-affiliation):not(.placeholder) {
  text-align: justify;
}

.resource-list {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
}

.resource-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.resource-list a {
  color: var(--accent);
  text-decoration: none;
}

.resource-list a:hover {
  text-decoration: underline;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}