:root {
  --color-bg: #fafaf9;
  --color-surface: #ffffff;
  --color-border: #e2e2df;
  --color-text: #1f2421;
  --color-text-muted: #5b6460;
  --color-accent: #2c5f6f;
  --color-accent-dark: #1d4552;
  --color-accent-bg: #eaf1f2;
  --color-tag-bg: #eef2ee;
  --color-tag-text: #2f4f3f;
  --color-tag-bg-active: #2c5f6f;
  --color-tag-text-active: #ffffff;
  --radius: 8px;
  --max-width: 1180px;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Iowan Old Style", "Palatino Linotype", Georgia, "Times New Roman", serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.55;
}

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

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

.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.site-header .inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.25rem 1.5rem 1rem;
}

.site-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 0.15rem;
  letter-spacing: -0.01em;
}

.site-subtitle {
  margin: 0 0 1rem;
  color: var(--color-text-muted);
  font-size: 0.98rem;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.95rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--color-text-muted);
  padding-bottom: 0.4rem;
  border-bottom: 2px solid transparent;
}

.site-nav a.active,
.site-nav a:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.75rem 1.5rem 4rem;
}

.layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 800px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

.filters {
  position: sticky;
  top: 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.1rem 1.3rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

.filters h2 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin: 1.1rem 0 0.5rem;
}

.filters h2:first-child {
  margin-top: 0;
}

.search-box {
  width: 100%;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.92rem;
  font-family: inherit;
  background: var(--color-bg);
}

.search-box:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.facet-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-height: 220px;
  overflow-y: auto;
  padding-right: 0.25rem;
}

.facet-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.92rem;
  cursor: pointer;
  color: var(--color-text);
}

.facet-option input {
  accent-color: var(--color-accent);
}

.facet-count {
  color: var(--color-text-muted);
  font-size: 0.82rem;
  margin-left: auto;
  padding-left: 0.5rem;
}

.clear-filters {
  margin-top: 1.2rem;
  width: 100%;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-family: inherit;
  font-size: 0.88rem;
  cursor: pointer;
}

.clear-filters:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

.results-bar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1rem;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
}

.card-title {
  margin: 0 0 0.3rem;
  font-size: 1.18rem;
  font-weight: 700;
}

.card-meta {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.88rem;
  color: var(--color-text-muted);
  margin-bottom: 0.7rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.9rem;
}

.card-meta .ects-badge {
  display: inline-block;
  background: var(--color-accent-bg);
  color: var(--color-accent-dark);
  padding: 0.05rem 0.5rem;
  border-radius: 999px;
  font-weight: 600;
}

.card-description {
  font-size: 0.99rem;
}

.card-description p:first-child {
  margin-top: 0;
}

.card-description h2 {
  font-size: 1rem;
}

.tag-row {
  margin-top: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag-pill {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.78rem;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  border: none;
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  cursor: pointer;
}

.tag-pill.active {
  background: var(--color-tag-bg-active);
  color: var(--color-tag-text-active);
}

.empty-state {
  color: var(--color-text-muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  padding: 2rem 0;
  text-align: center;
}

.thesis-link {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.88rem;
}

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem;
  color: var(--color-text-muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 0.82rem;
}

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