/* =========================================================
   department.css — IGCE Department Pages Styling
   Indra Ganesan College of Engineering
   ========================================================= */

/* ── CSS Variables ─────────────────────────────────────── */
:root {
  --dept-primary:       #0d6efd;
  --dept-primary-dark:  #0b5ed7;
  --dept-primary-light: #e8f2ff;
  --dept-secondary:     #2c3e50;
  --dept-accent:        #0dcaf0;
  --dept-text:          #212529;
  --dept-text-muted:    #6c757d;
  --dept-bg-light:      #f8f9fa;
  --dept-card-radius:   12px;
  --dept-shadow-sm:     0 2px 8px rgba(0, 0, 0, 0.06);
  --dept-shadow-md:     0 6px 20px rgba(0, 0, 0, 0.10);
  --dept-shadow-hover:  0 10px 30px rgba(13, 110, 253, 0.18);
  --dept-transition:    all 0.25s ease;
}

/* ── Base ───────────────────────────────────────────────── */
body {
  font-family: "Roboto", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--dept-text);
  background-color: #ffffff;
  overflow-x: hidden;
}

/* ── Department Header Banner ───────────────────────────── */
.department-header {
  background: linear-gradient(135deg, #1a5f9e 0%, var(--dept-primary) 60%, #0048ba 100%);
  padding: 4rem 0 3.5rem;
  position: relative;
  overflow: hidden;
}

.department-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(255,255,255,0.12) 0%, transparent 55%);
  pointer-events: none;
}

.department-header h1 {
  font-family: "Montserrat", "Roboto", sans-serif;
  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.department-info {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.department-icon {
  font-size: 5rem;
  opacity: 0.2;
  color: #ffffff;
  line-height: 1;
}

/* ── Internal Sub-Navigation ────────────────────────────── */
.internal-nav {
  background: #ffffff;
  border-bottom: 2px solid #e9ecef;
  box-shadow: var(--dept-shadow-sm);
  z-index: 1020;
}

.internal-nav .navbar {
  padding: 0;
}

.internal-nav .nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: #495057;
  padding: 0.9rem 1rem;
  border-bottom: 3px solid transparent;
  transition: var(--dept-transition);
  white-space: nowrap;
}

.internal-nav .nav-link:hover {
  color: var(--dept-primary);
  border-bottom-color: var(--dept-primary);
  background: var(--dept-primary-light);
}

.internal-nav .nav-link.active {
  color: var(--dept-primary);
  border-bottom-color: var(--dept-primary);
  font-weight: 600;
}

/* ── Section Titles & Dividers ──────────────────────────── */
.section-title {
  font-family: "Montserrat", "Roboto", sans-serif;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--dept-secondary);
  letter-spacing: -0.01em;
}

.section-divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--dept-primary), var(--dept-accent));
  border-radius: 4px;
  margin: 0.75rem 0 1.5rem;
}

/* ── Section Card ───────────────────────────────────────── */
.section-card {
  background: #ffffff;
  border: 1px solid rgba(13, 110, 253, 0.1);
  border-radius: var(--dept-card-radius);
  padding: 2rem 2.25rem;
  box-shadow: var(--dept-shadow-sm);
  transition: var(--dept-transition);
}

.section-card:hover {
  box-shadow: var(--dept-shadow-md);
}

/* ── Highlight Box ──────────────────────────────────────── */
.highlight-box {
  background: linear-gradient(135deg, var(--dept-primary-light) 0%, #d4e8ff 100%);
  border-left: 4px solid var(--dept-primary);
  border-radius: 0 var(--dept-card-radius) var(--dept-card-radius) 0;
  padding: 1.25rem 1.5rem;
}

.highlight-box h5 {
  color: var(--dept-primary-dark);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

/* ── Info Cards (small feature boxes) ──────────────────── */
.info-card {
  background: #ffffff;
  border: 1px solid rgba(13, 110, 253, 0.12);
  border-radius: var(--dept-card-radius);
  padding: 1.5rem;
  box-shadow: var(--dept-shadow-sm);
  text-align: center;
  transition: var(--dept-transition);
  height: 100%;
}

.info-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--dept-shadow-hover);
  border-color: rgba(13, 110, 253, 0.3);
}

.info-card i {
  font-size: 2.5rem;
  color: var(--dept-primary);
  margin-bottom: 1rem;
  display: block;
}

.info-card h5 {
  font-weight: 700;
  color: var(--dept-secondary);
  margin-bottom: 0.5rem;
}

.info-card p {
  font-size: 0.9rem;
  color: var(--dept-text-muted);
  margin: 0;
}

/* ── Vision & Mission Cards ─────────────────────────────── */
.mission-card {
  background: #ffffff;
  border-radius: var(--dept-card-radius);
  padding: 2rem;
  box-shadow: var(--dept-shadow-sm);
  border: 1px solid rgba(13, 110, 253, 0.1);
  transition: var(--dept-transition);
}

.mission-card:hover {
  box-shadow: var(--dept-shadow-hover);
  border-color: rgba(13, 110, 253, 0.3);
}

.mission-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--dept-primary), var(--dept-accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.5rem;
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(13, 110, 253, 0.35);
}

.mission-icon i {
  font-size: 1.5rem;
}

.mission-title {
  font-family: "Montserrat", sans-serif;
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--dept-secondary);
  margin-bottom: 1rem;
}

.mission-text {
  color: var(--dept-text);
  line-height: 1.75;
  margin: 0;
}

.mission-list,
.mission-points,
.vision-points {
  padding-left: 0;
  list-style: none;
}

.mission-list li,
.mission-points li,
.vision-points li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.6rem;
  line-height: 1.65;
  color: var(--dept-text);
}

.mission-list li::before,
.mission-points li::before,
.vision-points li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--dept-primary);
  font-weight: 700;
  font-size: 1.1em;
}

.vision-card {
  background: linear-gradient(135deg, #1a5f9e 0%, var(--dept-primary) 100%);
  border-radius: var(--dept-card-radius);
  padding: 2rem;
  color: #ffffff;
  box-shadow: var(--dept-shadow-md);
}

.vision-title {
  font-family: "Montserrat", sans-serif;
  font-weight: 800;
  font-size: 1.3rem;
  color: #ffffff;
  margin-bottom: 1rem;
}

/* ── Programme Cards ────────────────────────────────────── */
.programme-card {
  border: 1px solid rgba(13, 110, 253, 0.15);
  border-radius: var(--dept-card-radius);
  overflow: hidden;
  box-shadow: var(--dept-shadow-sm);
  transition: var(--dept-transition);
  height: 100%;
}

.programme-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--dept-shadow-hover);
}

.programme-header {
  background: linear-gradient(135deg, var(--dept-primary) 0%, var(--dept-primary-dark) 100%);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.programme-name {
  color: #ffffff;
  font-weight: 700;
  font-size: 1.05rem;
  margin: 0;
}

.programme-body {
  background: #ffffff;
  padding: 1.5rem;
}

.programme-info h5 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--dept-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.3rem;
}

.programme-info p {
  font-size: 1rem;
  font-weight: 600;
  color: var(--dept-text);
}

.programme-highlights h5 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--dept-secondary);
  margin-bottom: 0.6rem;
}

.programme-highlights ul,
.programme-list {
  padding-left: 1.25rem;
  margin: 0;
}

.programme-highlights ul li,
.programme-list li {
  margin-bottom: 0.35rem;
  font-size: 0.9rem;
  color: var(--dept-text);
}

/* ── Eligibility Cards ──────────────────────────────────── */
.eligibility-card {
  background: #ffffff;
  border: 1px solid rgba(13, 110, 253, 0.12);
  border-radius: var(--dept-card-radius);
  padding: 1.75rem;
  box-shadow: var(--dept-shadow-sm);
  height: 100%;
}

.eligibility-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid #f1f3f5;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.eligibility-item:last-child {
  border-bottom: none;
}

.eligibility-content,
.eligibility-details {
  font-size: 0.9rem;
  color: var(--dept-text);
}

/* ── Curriculum Selector ────────────────────────────────── */
.curriculum-selector {
  background: var(--dept-bg-light);
  border-radius: var(--dept-card-radius);
  padding: 1.25rem 1.5rem;
  display: inline-block;
  border: 1px solid #e9ecef;
}

.curriculum-selector h5 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--dept-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.courses-accordion {
  margin-top: 1rem;
}

.course-materials {
  font-size: 0.95rem;
  color: var(--dept-text);
}

/* ── PEO / PSO Cards ────────────────────────────────────── */
.peo-card,
.pso-card {
  border: 1px solid rgba(13, 110, 253, 0.12);
  border-radius: var(--dept-card-radius);
  overflow: hidden;
  margin-bottom: 1rem;
  box-shadow: var(--dept-shadow-sm);
  transition: var(--dept-transition);
}

.peo-card:hover,
.pso-card:hover {
  box-shadow: var(--dept-shadow-md);
}

.peo-header,
.pso-header {
  background: linear-gradient(135deg, var(--dept-primary-light), #d0e6ff);
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-bottom: 1px solid rgba(13, 110, 253, 0.15);
}

.peo-number,
.pso-number {
  background: var(--dept-primary);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.65rem;
  border-radius: 50rem;
  white-space: nowrap;
  letter-spacing: 0.05em;
}

.peo-header h5,
.pso-header h5 {
  margin: 0;
  font-weight: 700;
  font-size: 1rem;
  color: var(--dept-secondary);
}

.peo-body,
.pso-body {
  background: #ffffff;
  padding: 1rem 1.5rem;
}

.peo-body p,
.pso-body p {
  margin: 0;
  font-size: 0.93rem;
  color: var(--dept-text);
  line-height: 1.7;
}

.peo-item,
.pso-item,
.peo-content,
.pso-content {
  font-size: 0.93rem;
  line-height: 1.7;
}

/* ── Career Section ─────────────────────────────────────── */
.career-content {
  background: #ffffff;
  border-radius: var(--dept-card-radius);
  padding: 2rem 2.25rem;
  box-shadow: var(--dept-shadow-sm);
  border: 1px solid rgba(13, 110, 253, 0.08);
}

.career-highlights,
.career-positions,
.career-roles,
.career-sectors {
  margin-top: 1rem;
}

.career-objective {
  background: var(--dept-primary-light);
  border-left: 4px solid var(--dept-primary);
  padding: 1rem 1.25rem;
  border-radius: 0 8px 8px 0;
  font-size: 0.95rem;
  line-height: 1.7;
}

.job-positions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.professional-courses {
  list-style: none;
  padding: 0;
}

.professional-courses li {
  padding: 0.5rem 0;
  border-bottom: 1px dashed #dee2e6;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  font-size: 0.93rem;
}

.professional-courses li::before {
  content: "•";
  color: var(--dept-primary);
  font-weight: 900;
  flex-shrink: 0;
  margin-top: 0.05em;
}

/* ── Event Highlight ────────────────────────────────────── */
.event-highlight {
  background: linear-gradient(135deg, var(--dept-primary-light), #eef4ff);
  border-radius: var(--dept-card-radius);
  padding: 1.25rem 1.5rem;
  border: 1px solid rgba(13, 110, 253, 0.15);
}

.events-filter {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.exam-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--dept-primary);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 50rem;
  letter-spacing: 0.03em;
}

.exams-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 0.75rem;
}

/* ── Faculty Note / Tab ─────────────────────────────────── */
.faculty-note {
  background: #fff8e1;
  border-left: 4px solid #f59e0b;
  border-radius: 0 8px 8px 0;
  padding: 0.9rem 1.2rem;
  font-size: 0.9rem;
  color: #856404;
  margin-top: 1rem;
}

.faculty-tabs {
  border-bottom: 2px solid #e9ecef;
  margin-bottom: 1.5rem;
}

/* ── Department Color Overrides ─────────────────────────── */
.dept-cse .department-header,
.dept-cse .internal-nav .nav-link.active {
  --dept-primary: #0066cc;
}

.dept-ece .department-header {
  background: linear-gradient(135deg, #1a7a4a 0%, #198754 60%, #146c43 100%);
  --dept-primary: #198754;
}

.dept-eee .department-header {
  background: linear-gradient(135deg, #a16207 0%, #ca8a04 60%, #854d0e 100%);
  --dept-primary: #ca8a04;
}

.dept-aids .department-header {
  background: linear-gradient(135deg, #6d28d9 0%, #7c3aed 60%, #5b21b6 100%);
  --dept-primary: #7c3aed;
}

.dept-biomedical .department-header {
  background: linear-gradient(135deg, #be185d 0%, #db2777 60%, #9d174d 100%);
  --dept-primary: #db2777;
}

.dept-agriculture .department-header {
  background: linear-gradient(135deg, #047857 0%, #059669 60%, #065f46 100%);
  --dept-primary: #059669;
}

.dept-mechanical .department-header {
  background: linear-gradient(135deg, #b91c1c 0%, #dc2626 60%, #991b1b 100%);
  --dept-primary: #dc2626;
}

.dept-mba_department .department-header,
.dept-mba .department-header {
  background: linear-gradient(135deg, #0e7490 0%, #0891b2 60%, #0c6278 100%);
  --dept-primary: #0891b2;
}

.dept-sh_department .department-header,
.dept-sh .department-header {
  background: linear-gradient(135deg, #374151 0%, #4b5563 60%, #1f2937 100%);
  --dept-primary: #4b5563;
}

.dept-it_department .department-header,
.dept-it .department-header {
  background: linear-gradient(135deg, #1e40af 0%, #2563eb 60%, #1e3a8a 100%);
  --dept-primary: #2563eb;
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 991.98px) {
  .department-header h1 {
    font-size: 1.8rem;
  }

  .section-card {
    padding: 1.5rem;
  }

  .career-content {
    padding: 1.5rem;
  }

  .internal-nav .nav-link {
    padding: 0.65rem 0.75rem;
    font-size: 0.82rem;
  }
}

@media (max-width: 575.98px) {
  .department-header {
    padding: 2.5rem 0 2rem;
  }

  .department-header h1 {
    font-size: 1.5rem;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .mission-icon {
    width: 48px;
    height: 48px;
  }

  .peo-header,
  .pso-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }
}