:root {
  --ink: #1c2530;
  --ink-soft: #4b5563;
  --paper: #f6f4ef;
  --paper-raised: #ffffff;
  --line: #d8d3c6;
  --accent: #2f5d4f;
  --accent-soft: #e3ece8;
  --gold: #b9832f;
  --danger: #a63d2f;
  --danger-soft: #f6e6e2;
  --radius: 6px;
  --font-display: Georgia, "Times New Roman", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eceae4;
    --ink-soft: #b7b3a8;
    --paper: #171b1f;
    --paper-raised: #20262c;
    --line: #333a41;
    --accent: #6fae97;
    --accent-soft: #1e2b26;
    --gold: #d9a75a;
    --danger: #e07a68;
    --danger-soft: #3a201c;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.55;
}

h1, h2 { font-family: var(--font-display); font-weight: 400; }
h1 { font-size: 2rem; }
h2 { font-size: 1.4rem; border-bottom: 1px solid var(--line); padding-bottom: 0.4rem; }

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--line);
}

.brand-name { font-family: var(--font-display); font-size: 1.3rem; }
.brand-tagline { display: block; font-size: 0.85rem; color: var(--ink-soft); }

.main-nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.main-nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
  cursor: pointer;
}
.main-nav a:hover, .main-nav a.active { border-bottom-color: var(--accent); }

.announcement {
  background: var(--accent-soft);
  color: var(--ink);
  padding: 0.6rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

main { max-width: 900px; margin: 0 auto; padding: 1.5rem; }

.view[hidden] { display: none; }

.hero { margin-bottom: 1.5rem; }

.dept-cards { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.dept-card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  cursor: pointer;
  min-width: 160px;
  flex: 1 1 160px;
}
.dept-card:hover { border-color: var(--accent); }

.browse-controls { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.browse-controls label { display: flex; flex-direction: column; font-size: 0.85rem; color: var(--ink-soft); gap: 0.25rem; }

.file-list { list-style: none; padding: 0; margin: 0; }
.file-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.4rem;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}
.file-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }

.badge-expiring {
  font-size: 0.75rem;
  background: var(--danger-soft);
  color: var(--danger);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
  white-space: nowrap;
}

form { display: flex; flex-direction: column; gap: 1rem; max-width: 560px; }
form label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.9rem; color: var(--ink-soft); }
input, select {
  font: inherit;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-raised);
  color: var(--ink);
}

.hint { font-size: 0.8rem; color: var(--ink-soft); }

button {
  align-self: flex-start;
  font: inherit;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0.6rem 1.2rem;
  cursor: pointer;
}
button:hover { opacity: 0.9; }
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); }

.form-error {
  background: var(--danger-soft);
  color: var(--danger);
  border-radius: var(--radius);
  padding: 0.6rem 0.8rem;
  font-size: 0.9rem;
}

.status-line {
  font-size: 0.85rem;
  color: var(--gold);
  border-left: 3px solid var(--gold);
  padding-left: 0.6rem;
  margin: 0.75rem 0;
}

.site-footer {
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.85rem;
  padding: 1.5rem;
  border-top: 1px solid var(--line);
}

@media (max-width: 600px) {
  .main-nav { flex-wrap: wrap; }
  .file-list li { flex-wrap: wrap; }
}