/* ========================================
   IMPROVED UNIVERSITY COMPETITION UI 
   Modern, Responsive, Accessible Design
========================================= */

/* CSS Variables for Design System */
:root {
  /* Colors */
  --primary-blue: #3b82f6;
  --primary-purple: #8b5cf6;
  --secondary-blue: #1e40af;
  --secondary-purple: #7c3aed;
  --success-green: #10b981;
  --warning-orange: #f59e0b;
  --danger-red: #ef4444;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 100%);
  --gradient-light: linear-gradient(135deg, var(--gray-50) 0%, #e0e7ff 100%);
  --gradient-card: linear-gradient(135deg, #ffffff 0%, var(--gray-50) 100%);
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Spacing */
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans KR", sans-serif;
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  color: var(--gray-800);
  background: var(--gradient-light);
  min-height: 100vh;
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-blue);
  color: white;
  padding: var(--space-2) var(--space-4);
  text-decoration: none;
  border-radius: var(--radius-md);
  z-index: 100;
  font-weight: 500;
  transform: translateY(-100%);
  transition: transform 0.2s;
}

.skip-link:focus {
  transform: translateY(0);
  top: 0;
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.sr-only.focus:focus {
  position: static;
  width: auto;
  height: auto;
  padding: initial;
  margin: initial;
  overflow: visible;
  clip: auto;
  white-space: normal;
}

/* Main Container */
.uni-comp-container {
  max-width: 1400px;
  margin: var(--space-8) auto;
  padding: var(--space-6);
  background: var(--gradient-card);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  position: relative;
  overflow: hidden;
}

.uni-comp-container::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

/* Page Title */
.page-title {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-align: center;
  margin-bottom: var(--space-12);
  position: relative;
}

.page-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

/* Layout */
.main-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.left-panel {
  flex: 1;
}

/* Search Form Improvements */
.search-pagination-container {
  margin-bottom: var(--space-8);
}

.search-form {
  background: var(--gradient-light);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-md);
  margin-bottom: var(--space-6);
}

.search-form h2 {
  color: var(--gray-800);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  font-size: 1.25rem;
  font-weight: 700;
}

.search-form h2 i {
  color: var(--primary-blue);
  margin-right: var(--space-2);
}

/* Grid Layout for Form Fields */
.search-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: var(--space-2);
  font-size: 0.875rem;
}

.form-group input,
.form-group select {
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  transition: all 0.2s ease;
  background: white;
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
  transform: translateY(-1px);
}

.form-group input:hover,
.form-group select:hover {
  border-color: var(--gray-300);
}

/* Button Group */
.button-group {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  flex-wrap: wrap;
}

.btn {
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  font-family: inherit;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background: var(--gray-200);
  color: var(--gray-800);
}

.btn-secondary:hover {
  background: var(--gray-300);
}

/* Action Buttons */
.action-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: flex-end;
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: var(--space-6);
}

.action-btn {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  border: none;
  background: var(--gray-100);
  color: var(--gray-700);
}

.action-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.action-btn.favorite {
  background: #fee2e2;
  color: #dc2626;
}

.action-btn.favorite:hover {
  background: #fecaca;
}

.action-btn.compare {
  background: #dbeafe;
  color: #2563eb;
}

.action-btn.compare:hover {
  background: #bfdbfe;
}

.action-btn.download {
  background: #d1fae5;
  color: #059669;
}

.action-btn.download:hover {
  background: #a7f3d0;
}

.action-btn.pdf {
  background: #fed7aa;
  color: #ea580c;
}

.action-btn.pdf:hover {
  background: #fdba74;
}

/* Enhanced Table Styles */
.university-list {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.university-list th {
  background: var(--gradient-primary);
  color: white;
  padding: var(--space-4) var(--space-6);
  text-align: left;
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: relative;
}

.university-list th:first-child {
  border-radius: var(--radius-xl) 0 0 0;
}

.university-list th:last-child {
  border-radius: 0 var(--radius-xl) 0 0;
}

.university-list tbody tr {
  border-bottom: 1px solid var(--gray-100);
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.university-list tbody tr:nth-child(odd) {
  background: var(--gray-50);
}

.university-list tbody tr:nth-child(even) {
  background: white;
}

.university-list tbody tr:hover {
  background: linear-gradient(90deg, #eff6ff 0%, #f0f9ff 100%);
  box-shadow: inset 4px 0 0 0 var(--primary-blue);
  transform: translateX(4px);
}

/* Top 3 Highlighting */
.university-list tbody tr:nth-child(1),
.university-list tbody tr:nth-child(2),
.university-list tbody tr:nth-child(3) {
  background: linear-gradient(90deg, #fef3c7 0%, #fef9e7 100%);
  font-weight: 600;
  position: relative;
}

.university-list tbody tr:nth-child(-n+3)::before {
  content: "⭐";
  position: absolute;
  left: var(--space-2);
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
}

.university-list tbody tr:nth-child(-n+3) td:first-child {
  padding-left: 2rem;
}

.university-list tbody tr:nth-child(-n+3):hover {
  background: linear-gradient(90deg, #fde68a 0%, #fed7aa 100%);
}

.university-list td {
  padding: var(--space-4) var(--space-6);
  border-bottom: none;
  font-size: 0.875rem;
}

.university-list td strong {
  font-size: 1rem;
  color: var(--gray-900);
}

/* Competition Rate Styling */
.university-list tbody td:nth-child(5) {
  font-weight: 700;
  color: var(--primary-blue);
}

/* Gender Ratio Colors */
.male-count {
  color: var(--primary-blue);
  font-weight: 700;
}

.female-count {
  color: #ec4899;
  font-weight: 700;
}

/* Responsive Table - Mobile Card Layout */
@media (max-width: 768px) {
  .university-list {
    display: block;
    border-radius: 0;
    box-shadow: none;
  }
  
  .university-list thead {
    display: none;
  }
  
  .university-list tbody {
    display: block;
  }
  
  .university-list tbody tr {
    display: block;
    background: white !important;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
    transform: none !important;
    box-shadow: var(--shadow-sm) !important;
  }
  
  .university-list tbody tr:hover {
    transform: translateY(-2px) !important;
    box-shadow: var(--shadow-md) !important;
  }
  
  .university-list tbody tr:nth-child(-n+3)::before {
    position: static;
    transform: none;
    margin-right: var(--space-2);
  }
  
  .university-list tbody tr:nth-child(-n+3) td:first-child {
    padding-left: var(--space-4);
  }
  
  .university-list td {
    display: grid;
    grid-template-columns: 120px 1fr;
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--gray-100);
    font-size: 0.875rem;
    gap: var(--space-2);
    align-items: center;
  }
  
  .university-list td:last-child {
    border-bottom: none;
  }
  
  .university-list td::before {
    content: attr(data-label);
    font-weight: 700;
    color: var(--gray-600);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
}

/* Enhanced Modal Styles */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: all 0.3s ease;
}

.modal.show {
  display: flex !important;
  justify-content: center;
  align-items: flex-start;
  padding: var(--space-8);
  opacity: 1;
  animation: modalFadeIn 0.3s ease;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-content {
  background: white;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 900px;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
  animation: modalSlideUp 0.3s ease;
}

@keyframes modalSlideUp {
  from {
    transform: translateY(50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.close-button {
  position: absolute;
  top: var(--space-4);
  right: var(--space-6);
  background: var(--gray-100);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--gray-600);
  transition: all 0.2s ease;
}

.close-button:hover {
  background: var(--gray-200);
  color: var(--gray-800);
  transform: scale(1.1);
}

.modal-content h2 {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: var(--space-6);
  padding-right: 50px;
}

.detail-content {
  margin-top: var(--space-4);
}

.detail-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--gray-800);
  margin-bottom: var(--space-2);
}

.detail-content p {
  color: var(--gray-600);
  margin-bottom: var(--space-4);
}

.competition-rate {
  font-weight: 700;
  color: var(--primary-blue);
  font-size: 1.125rem;
  margin-bottom: var(--space-6);
  text-align: center;
  padding: var(--space-3);
  background: var(--gradient-light);
  border-radius: var(--radius-lg);
}

/* Chart Container */
.chart-container {
  background: white;
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  margin-top: var(--space-4);
}

canvas {
  max-width: 100%;
  height: 400px;
  border-radius: var(--radius-md);
}

/* Pagination Improvements */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-2);
}

.pagination a {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--gray-700);
  font-weight: 600;
  transition: all 0.2s ease;
  min-width: 40px;
  height: 40px;
}

.pagination a:hover {
  border-color: var(--primary-blue);
  color: var(--primary-blue);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.pagination a.active {
  background: var(--gradient-primary);
  color: white;
  border-color: var(--primary-blue);
  box-shadow: var(--shadow-md);
}

/* Loading States */
.loading-spinner {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--gray-200);
  border-top: 2px solid var(--primary-blue);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.p-4 { padding: var(--space-4); }
.rounded { border-radius: var(--radius-md); }
.shadow { box-shadow: var(--shadow-sm); }

/* Focus States for Accessibility */
.btn:focus,
input:focus,
select:focus,
.pagination a:focus {
  outline: 2px solid var(--primary-blue);
  outline-offset: 2px;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print Styles */
@media print {
  .modal,
  .action-buttons,
  .pagination,
  .search-form {
    display: none !important;
  }
  
  .university-list {
    box-shadow: none;
  }
  
  .university-list tbody tr:hover {
    background: none !important;
    transform: none !important;
    box-shadow: none !important;
  }
}

/* Error States */
.error-message {
  background: #fef2f2;
  color: #dc2626;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid #fecaca;
  margin-bottom: var(--space-4);
}

.success-message {
  background: #f0fdf4;
  color: #166534;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid #bbf7d0;
  margin-bottom: var(--space-4);
}