:root {
  --primary: #1D4ED8;
  --primary-dark: #1E40AF;
  --primary-light: #3B82F6;
  --secondary: #10B981;
  --secondary-dark: #059669;
  --text: #0B1220;
  --text-light: #475569;
  --surface: #F8FAFC;
  --surface-white: #FFFFFF;
  --muted: #E2E8F0;
  --border: #CBD5E1;
  --accent: #F59E0B;
  --danger: #EF4444;
  --success: #10B981;

  --spacing-xs: 0.5rem;
  --spacing-sm: 0.75rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

  --transition-base: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: clamp(0.938rem, 0.9vw, 1rem);
  line-height: 1.6;
  color: var(--text);
  background: var(--surface);
  overflow-x: hidden;
}

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

a:hover {
  color: var(--primary-dark);
}

a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--primary);
  color: white;
  padding: var(--spacing-md);
  z-index: 9999;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-3xl) 0;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--spacing-xl);
  text-align: center;
  line-height: 1.2;
}

.section-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  color: var(--text-light);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--spacing-2xl);
  line-height: 1.5;
}

.top-bar {
  background: var(--primary);
  color: white;
  padding: var(--spacing-sm) 0;
  font-size: 0.875rem;
}

.top-bar .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-sm);
}

.top-bar-info {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  align-items: center;
}

.top-bar-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.top-bar-social {
  display: flex;
  gap: var(--spacing-sm);
}

.top-bar-social a {
  color: white;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  transition: background var(--transition-base);
}

.top-bar-social a:hover {
  background: rgba(255, 255, 255, 0.2);
}

.header {
  background: var(--surface-white);
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-main {
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--muted);
}

.header-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.logo-wrapper {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-shrink: 0;
}

.logo-img {
  width: 60px;
  height: 60px;
  object-fit: contain;
}

.school-info h1 {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 0.25rem;
}

.school-meta {
  font-size: 0.75rem;
  color: var(--text-light);
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.school-meta span {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.header-extra {
  margin-left: auto;
  display: flex;
  gap: var(--spacing-md);
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--secondary);
  color: white;
}

.btn-secondary:hover {
  background: var(--secondary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  border: 2px solid var(--primary);
  color: var(--primary);
  background: transparent;
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
}

.navbar {
  background: var(--surface-white);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-md);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xs);
}

.nav-link {
  display: block;
  padding: var(--spacing-md) var(--spacing-lg);
  color: var(--text);
  font-weight: 500;
  transition: all var(--transition-base);
  border-radius: var(--radius-md);
  position: relative;
}

.nav-link:hover {
  color: var(--primary);
  background: var(--surface);
}

.nav-link.active {
  color: var(--primary);
  background: var(--surface);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--spacing-lg);
  right: var(--spacing-lg);
  height: 3px;
  background: var(--primary);
  border-radius: 3px 3px 0 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 3px;
  background: var(--text);
  border-radius: 3px;
  transition: all var(--transition-base);
}

.announcement-bar {
  background: linear-gradient(135deg, var(--accent) 0%, #F97316 100%);
  padding: var(--spacing-sm) 0;
  overflow: hidden;
  position: relative;
}

.announcement-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  color: white;
  font-weight: 500;
  animation: scroll-left 30s linear infinite;
  white-space: nowrap;
}

.announcement-item {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0 var(--spacing-xl);
}

@keyframes scroll-left {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.hero {
  position: relative;
  height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary) 0%, #1E40AF 100%);
}

.hero-slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease-in-out;
}

.hero-slide.active {
  opacity: 1;
}

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(29, 78, 216, 0.85) 0%, rgba(30, 64, 175, 0.75) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: white;
  max-width: 900px;
  padding: 0 var(--spacing-lg);
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-lg);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  line-height: 1.5;
  margin-bottom: var(--spacing-2xl);
  opacity: 0.95;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-actions .btn {
  padding: var(--spacing-md) var(--spacing-2xl);
  font-size: 1.125rem;
}

.hero-actions .btn-outline {
  border-color: white;
  color: white;
}

.hero-actions .btn-outline:hover {
  background: white;
  color: var(--primary);
}

.hero-controls {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  gap: var(--spacing-sm);
}

.hero-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  border: 2px solid white;
  cursor: pointer;
  transition: all var(--transition-base);
}

.hero-dot.active {
  background: white;
  transform: scale(1.2);
}

.card {
  background: var(--surface-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-slow);
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

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

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.card-body {
  padding: var(--spacing-lg);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
}

.card-text {
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
  flex-grow: 1;
}

.card-meta {
  display: flex;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
}

.card-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.grid {
  display: grid;
  gap: var(--spacing-xl);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.feature-card {
  background: var(--surface-white);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all var(--transition-slow);
  border: 2px solid transparent;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--spacing-sm);
}

.feature-text {
  color: var(--text-light);
  line-height: 1.6;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
}

.stat-card {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-xl);
  text-align: center;
  color: white;
  box-shadow: var(--shadow-lg);
}

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.stat-label {
  font-size: 1rem;
  opacity: 0.9;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  background: var(--surface-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead {
  background: var(--primary);
  color: white;
}

th {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-weight: 600;
}

td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--muted);
}

tbody tr:hover {
  background: var(--surface);
}

.breadcrumb {
  padding: var(--spacing-md) 0;
  background: var(--surface);
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.breadcrumb-item::after {
  content: '/';
  color: var(--text-light);
}

.breadcrumb-item:last-child::after {
  display: none;
}

.breadcrumb-item:last-child {
  color: var(--text-light);
}

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text);
}

.form-label.required::after {
  content: ' *';
  color: var(--danger);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-white);
  transition: all var(--transition-base);
  font-size: 1rem;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-error {
  color: var(--danger);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  display: none;
}

.form-group.error .form-error {
  display: block;
}

.form-group.error .form-input,
.form-group.error .form-textarea,
.form-group.error .form-select {
  border-color: var(--danger);
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.form-check input {
  margin-top: 0.25rem;
  flex-shrink: 0;
}

.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
  display: flex;
  align-items: start;
  gap: var(--spacing-sm);
}

.alert-success {
  background: #D1FAE5;
  color: #065F46;
  border-left: 4px solid var(--success);
}

.alert-info {
  background: #DBEAFE;
  color: #1E40AF;
  border-left: 4px solid var(--primary);
}

.alert-warning {
  background: #FEF3C7;
  color: #92400E;
  border-left: 4px solid var(--accent);
}

.alert-danger {
  background: #FEE2E2;
  color: #991B1B;
  border-left: 4px solid var(--danger);
}

.toast {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  background: var(--surface-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: none;
  align-items: center;
  gap: var(--spacing-md);
  min-width: 300px;
  max-width: 400px;
  z-index: 9999;
  animation: slideInRight 0.3s ease-out;
}

.toast.show {
  display: flex;
}

@keyframes slideInRight {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.footer {
  background: var(--text);
  color: white;
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  color: white;
}

.footer-section p,
.footer-section li {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
}

.footer-section ul {
  list-style: none;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-base);
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
}

.back-to-top {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  z-index: 999;
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-4px);
}

.back-to-top.show {
  display: flex;
}

.badge {
  display: inline-flex;
  padding: 0.25rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: white;
}

.badge-secondary {
  background: var(--secondary);
}

.badge-warning {
  background: var(--accent);
}

.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
}

.lightbox.show {
  display: flex;
}

.lightbox img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 48px;
  height: 48px;
  background: white;
  color: var(--text);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--surface-white);
    flex-direction: column;
    gap: 0;
    box-shadow: var(--shadow-lg);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
  }

  .nav-menu.active {
    max-height: 500px;
  }

  .nav-link {
    border-bottom: 1px solid var(--muted);
  }

  .header-extra {
    display: none;
  }

  .top-bar .container {
    justify-content: center;
  }

  .top-bar-social {
    display: none;
  }

  .hero {
    height: 500px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .section {
    padding: var(--spacing-2xl) 0;
  }
}

@media (max-width: 640px) {
  .header-main {
    padding: var(--spacing-md) 0;
  }

  .logo-img {
    width: 48px;
    height: 48px;
  }

  .school-meta {
    flex-direction: column;
    gap: 0.25rem;
  }

  .hero {
    height: 400px;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }
}

@media print {
  .top-bar,
  .navbar,
  .announcement-bar,
  .back-to-top,
  .hero-controls,
  .btn {
    display: none !important;
  }
}