@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

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

body {
  background: #ffffff;
  color: #111111;
  font-family: 'Inter', system-ui, sans-serif;
  max-width: 860px;
  margin: 0 auto;
  padding: 0 40px 80px;
  line-height: 1.6;
}

/* ── Header ── */
.site-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 52px 0 40px;
  border-bottom: 1px solid #e2e2e2;
  margin-bottom: 52px;
  gap: 16px;
}

.site-header img {
  width: 72px;
  height: 72px;
  object-fit: contain;
}

.site-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  text-align: center;
  line-height: 1.3;
}

.site-header .tagline {
  font-size: 0.95rem;
  color: #666666;
  text-align: center;
}

/* ── Section label ── */
.section-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: #999999;
  margin-bottom: 20px;
}

/* ── Talk cards ── */
.talk-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: #e2e2e2;
  border: 1px solid #e2e2e2;
  border-radius: 8px;
  overflow: hidden;
}

.talk-list li {
  background: #ffffff;
  padding: 22px 24px;
  display: grid;
  grid-template-columns: 160px 1fr auto;
  align-items: center;
  gap: 20px;
}

.talk-date {
  font-size: 0.82rem;
  color: #888888;
  line-height: 1.5;
}

.talk-date strong {
  display: block;
  font-size: 0.9rem;
  color: #333333;
  font-weight: 600;
}

.talk-info .talk-title {
  font-size: 0.97rem;
  font-weight: 600;
  color: #111111;
  margin-bottom: 4px;
}

.talk-info .talk-speaker {
  font-size: 0.83rem;
  color: #777777;
}

.slides-link {
  font-size: 0.8rem;
  font-weight: 600;
  color: #111111;
  border: 1px solid #cccccc;
  padding: 6px 14px;
  border-radius: 4px;
  white-space: nowrap;
  text-decoration: none;
  transition: background 0.15s;
}

.slides-link:hover {
  background: #f5f5f5;
  text-decoration: none;
}

/* ── Footer ── */
footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid #e2e2e2;
  text-align: center;
  font-size: 0.78rem;
  color: #aaaaaa;
  letter-spacing: 0.3px;
}