:root {
  --color-bg: #f8f9fb;
  --color-surface: #ffffff;
  --color-text: #1a1f2e;
  --color-muted: #5c6578;
  --color-border: #e2e6ee;
  --color-accent: #003366;
  --color-accent-light: #e8f0f8;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-accent);
}

a:hover {
  text-decoration: underline;
}

.site-header {
  background: var(--color-accent);
  color: #fff;
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-title {
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
}

.site-title:hover {
  text-decoration: underline;
}

.site-nav {
  display: flex;
  gap: 1.25rem;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: #fff;
  text-decoration: underline;
}

.site-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.site-footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 2rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0.25rem 0;
}

.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  line-height: 1.25;
}

.page-header p {
  margin: 0;
  color: var(--color-muted);
  max-width: 42rem;
}

.section {
  margin-bottom: 2.5rem;
}

.section h2 {
  font-size: 1.25rem;
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

.section h3 {
  font-size: 1.05rem;
  margin: 1.5rem 0 0.75rem;
  color: var(--color-muted);
}

.empty-state {
  color: var(--color-muted);
  font-style: italic;
  padding: 1rem 0;
}

.type-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.type-nav a {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-decoration: none;
  font-size: 0.9rem;
  color: var(--color-text);
}

.type-nav a:hover {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.seminar-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.seminar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem 1.5rem;
}

.seminar-card.is-cancelled {
  opacity: 0.75;
  border-style: dashed;
}

.seminar-card__header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  margin-bottom: 1rem;
}

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

.badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.badge-review {
  background: #e8f4ea;
  color: #1e5631;
}

.badge-defence {
  background: #fce8e8;
  color: #8b1a1a;
}

.badge-hdr {
  background: #e8f0f8;
  color: #003366;
}

.badge-special {
  background: #f3eef8;
  color: #4a2d6b;
}

.badge-cancelled {
  background: #f0f0f0;
  color: #666;
}

.announcement-thesis dl,
.announcement-event dl {
  margin: 0;
}

.announcement-thesis dt,
.announcement-event dt {
  font-weight: 700;
  margin: 0.75rem 0 0.15rem;
}

.announcement-thesis dt:first-child,
.announcement-event dt:first-child {
  margin-top: 0;
}

.announcement-thesis dd,
.announcement-event dd {
  margin: 0;
  padding-left: 0;
}

.announcement-thesis dd.abstract,
.announcement-event dd.abstract {
  white-space: pre-wrap;
}

.meeting-link {
  margin-top: 0.75rem;
}

.meeting-link a {
  font-weight: 500;
}

.home-links {
  margin-top: 2rem;
}

.home-links a {
  font-weight: 500;
}

.page-header__meta {
  font-size: 0.95rem;
  color: var(--color-muted);
  margin-top: 0.75rem;
}

.section-lead {
  margin: -0.5rem 0 1rem;
}

.table-wrap {
  overflow-x: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.series-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.series-table th,
.series-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-border);
}

.series-table th {
  background: var(--color-accent-light);
  font-weight: 600;
  white-space: nowrap;
}

.series-table tbody tr:last-child td {
  border-bottom: none;
}

.series-table tbody tr:hover {
  background: #fafbfc;
}

.series-table__date {
  white-space: nowrap;
}

.series-table__time {
  font-size: 0.85rem;
  color: var(--color-muted);
}