:root {
  --gate-card-bg: #ffffff;
  --gate-card-border: #e2e8f0;
}

.gate-main {
  padding-bottom: 3rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
  font-size: 0.85rem;
  color: var(--muted);
  margin: 1.5rem 0 1rem;
}

.breadcrumb a {
  color: var(--foreground);
  text-decoration: none;
  font-weight: 600;
  background: #eff6ff;
  border: 1px solid #dbeafe;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  transition: 0.2s ease;
}

.breadcrumb a:hover {
  color: var(--primary);
  background: #dbeafe;
}

.gate-page-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.55rem;
}

.gate-page-intro {
  color: var(--muted);
  max-width: 900px;
  line-height: 1.6;
}

.subjects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
}

.subject-card {
  text-decoration: none;
  color: var(--foreground);
  border: 1px solid var(--gate-card-border);
  border-radius: 1rem;
  background: var(--gate-card-bg);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.subject-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 24px rgba(15, 23, 42, 0.1);
  border-color: #bfdbfe;
}

.subject-icon {
  font-size: 1.35rem;
}

.subject-code-badge {
  align-self: flex-start;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
  background: #eff6ff;
}

.subject-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  margin: 0;
}

.subject-tags {
  display: flex;
}

.subject-tag {
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--gate-card-border);
  font-size: 0.72rem;
  color: var(--muted);
  background: #f8fafc;
}

.pyq-list h2 {
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

.gate-info {
  background: #ffffff;
  padding: 2rem;
  border-radius: 1rem;
  margin: 2rem 0;
  border: 1px solid var(--gate-card-border);
}

.gate-info h2 {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
  color: var(--foreground);
}

.gate-info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
  text-align: left;
}

.info-item {
  background: #eff6ff;
  padding: 1rem;
  border-radius: 0.75rem;
  border-left: 4px solid var(--primary);
}

.info-item h3 {
  font-size: 1rem;
  margin-bottom: 0.45rem;
  color: #1e40af;
  font-weight: 700;
}

.info-item p {
  font-size: 0.92rem;
  color: #374151;
  line-height: 1.5;
}

.pyq-year {
  border: 1px solid var(--gate-card-border);
  border-radius: 1rem;
  background: var(--gate-card-bg);
  padding: 1.1rem;
  margin-bottom: 1rem;
}

.pyq-year h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

.pyq-year ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}

.pyq-paper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border: 1px solid var(--gate-card-border);
  border-radius: 0.75rem;
  background: #f8fafc;
  padding: 0.72rem 0.9rem;
}

.pyq-paper-title {
  font-weight: 600;
  font-size: 0.93rem;
}

.pyq-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.pyq-btn {
  border: 1px solid var(--gate-card-border);
  background: #1f2937; /* dark button background for view */
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.38rem 0.8rem;
  border-radius: 0.5rem;
  cursor: pointer;
  text-decoration: none;
}

/* keep download button primary blue */
.pyq-btn.primary {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.pyq-btn.primary {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

.empty-state-msg {
  border: 1px dashed var(--gate-card-border);
  border-radius: 0.85rem;
  padding: 1rem;
  color: var(--muted);
}

body.dark-mode {
  --gate-card-bg: #0f172a;
  --gate-card-border: #1f2937;
}

body.dark-mode .subject-card,
body.dark-mode .pyq-year,
body.dark-mode .pyq-paper {
  background: #0b1220;
}

body.dark-mode .gate-info {
  background: #0b1220;
}

body.dark-mode .info-item {
  background: #111827;
  border-left-color: #60a5fa;
}

body.dark-mode .info-item h3 {
  color: #93c5fd;
}

body.dark-mode .info-item p {
  color: #d1d5db;
}

body.dark-mode .subject-tag,
body.dark-mode .subject-code-badge {
  background: #111827;
  color: #cbd5e1;
  border-color: #334155;
}

body.dark-mode .breadcrumb a {
  background: #0b1220;
  border-color: #1f2937;
  color: #e5e7eb;
}

body.dark-mode .breadcrumb a:hover {
  color: #93c5fd;
  background: #111827;
}

@media (max-width: 768px) {
  .gate-page-title {
    font-size: 1.6rem;
  }

  .subjects-grid {
    grid-template-columns: 1fr;
  }

  .pyq-paper {
    flex-direction: column;
    align-items: flex-start;
  }
}