.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-2);
}

/* ── Header ─────────────────────────────────────────────────── */
.site-header {
  background: var(--color-primary);
  border-bottom: 4px solid var(--color-white);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.site-header__inner {
  display: flex;
  align-items: center;
  height: var(--header-height);
  gap: var(--space-4);
}

.site-header__left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-width: 0;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  min-width: 0;
  flex-shrink: 0;
}

.site-header__logo {
  height: 40px;
  width: auto;
  flex-shrink: 0;
}


.site-header__title {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
  overflow: hidden;
}

.site-header__school {
  font-size: var(--text-base);
  font-weight: var(--weight-bold);
  color: var(--color-text-inverse);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-header__dept {
  font-size: var(--text-xs);
  color: var(--color-white-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: var(--weight-medium);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Navigation ─────────────────────────────────────────────── */
.site-nav {
  display: flex;
  gap: 2px;
}

.site-nav__link {
  display: block;
  padding: var(--space-2) var(--space-4);
  color: rgba(255,255,255,0.85);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.site-nav__link:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
  text-decoration: none;
}

.site-nav__link.active {
  background: var(--color-white);
  color: var(--color-primary-dark);
  font-weight: var(--weight-bold);
}

/* ── Page content area ──────────────────────────────────────── */
.page-content {
  padding: var(--space-4) 0 var(--space-3);
  flex: 1;
}

.page-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
}

.page-title {
  font-size: var(--text-2xl);
  color: var(--color-primary-dark);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-primary-light);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  margin-bottom: var(--space-4);
}

.back-link:hover { text-decoration: underline; }


/* ── Loading / error states ──────────────────────────────────── */
.loading-state {
  text-align: center;
  padding: var(--space-12) var(--space-4);
  color: var(--color-text-secondary);
}

.loading-spinner {
  display: inline-block;
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  margin-bottom: var(--space-3);
}

@media (prefers-reduced-motion: no-preference) {
  @keyframes spin { to { transform: rotate(360deg); } }
  .loading-spinner { animation: spin 0.7s linear infinite; }
}

.error-state {
  text-align: center;
  padding: var(--space-10) var(--space-4);
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.empty-state {
  text-align: center;
  padding: var(--space-10) var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  .page-title { font-size: var(--text-xl); }

  /* Single-row header: logo + nav | hamburger */
  .site-header__inner {
    height: var(--header-height);
    padding: 0;
    flex-wrap: nowrap;
    gap: var(--space-3);
  }

  /* Hide school name + dept — logo only */
  .site-header__title { display: none; }

  /* Left group: logo + nav inline, no wrapping */
  .site-header__left {
    flex: 1;
    min-width: 0;
    flex-wrap: nowrap;
    gap: var(--space-2);
    align-items: center;
  }

  /* Nav stays inline next to logo */
  .site-header__left .site-nav {
    order: unset;
    width: auto;
    justify-content: flex-start;
    padding-top: 0;
    border-top: none;
    gap: 2px;
  }

  /* Hide desktop-only header items */
  .header-action-links { display: none !important; }
  .notify-btn          { display: none !important; }
}