:root {
  --color-bg: #f1ece6;
  --color-surface: #fbf8f4;
  --color-text: #1f2430;
  --color-muted: #5b6472;
  --color-primary: #7a1f2b;
  --color-primary-dark: #5c1620;
  --color-border: #e3dad0;
  --color-warning-bg: #fff4e5;
  --color-warning-border: #f0b429;
  --radius: 10px;
  --max-width: 960px;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Header / Navigation */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header__bar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-header__brand {
  display: flex;
  flex-direction: column;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
  text-decoration: none;
}

.site-header__brand small {
  font-weight: 400;
  font-size: 0.7rem;
  color: var(--color-muted);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  font-size: 1.1rem;
  cursor: pointer;
}

.site-nav__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
  margin: 0;
  padding: 0;
}

.site-nav__list a {
  display: inline-block;
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  color: var(--color-text);
  font-size: 0.92rem;
}

.site-nav__list a:hover {
  background: var(--color-bg);
  text-decoration: none;
}

.site-nav__list a[aria-current="page"] {
  color: var(--color-primary);
  font-weight: 600;
  background: var(--color-bg);
}

/* Disclaimer banner shown on every page */
.disclaimer-banner {
  background: var(--color-warning-bg);
  border-bottom: 1px solid var(--color-warning-border);
  color: #6b4c00;
  font-size: 0.85rem;
  text-align: center;
  padding: 0.5rem 1rem;
}

/* Main content */
main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.page-title {
  margin-top: 0;
  color: var(--color-text);
}

.page-lead {
  color: var(--color-muted);
  font-size: 1.05rem;
}

.semester-title {
  margin: 2.25rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
  color: var(--color-primary-dark);
}

.semester-title:first-of-type {
  margin-top: 1rem;
}

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

.card h2 {
  margin-top: 0;
  font-size: 1.15rem;
}

.card h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.notice {
  border-left: 4px solid var(--color-warning-border);
  background: var(--color-warning-bg);
  padding: 1rem 1.25rem;
  border-radius: 6px;
  margin: 1.25rem 0;
}

.notice--strong {
  border-left-color: var(--color-primary);
  background: #fbeceb;
}

.home-hero {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  border-radius: var(--radius);
  padding: 2.25rem 1.75rem;
  margin-bottom: 1.5rem;
}

.home-hero h1 {
  margin-top: 0;
  font-size: 1.9rem;
}

.home-hero p {
  color: #f4e6e8;
  max-width: 60ch;
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.section-grid a.card {
  display: block;
  color: var(--color-text);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.section-grid a.card:hover {
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.section-grid a.card span.emoji {
  font-size: 1.4rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

table caption {
  text-align: left;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

th, td {
  border: 1px solid var(--color-border);
  padding: 0.55rem 0.7rem;
  text-align: left;
  font-size: 0.92rem;
}

th {
  background: var(--color-bg);
}

.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-muted);
  border: 1px solid var(--color-border);
}

.tag--open {
  color: #8a4b00;
  background: #fff1dd;
  border-color: #f0c98a;
}

.tag--resolved {
  color: #1a6b3c;
  background: #e6f6ec;
  border-color: #9ed9b6;
}

/* Footer */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 1.25rem;
  margin-top: auto;
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  font-size: 0.85rem;
  color: var(--color-muted);
  text-align: center;
}

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

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    display: none;
    width: 100%;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-header__bar {
    flex-wrap: wrap;
  }

  .site-nav__list {
    flex-direction: column;
    padding-bottom: 0.75rem;
  }
}