/**
 * Main Stylesheet
 * Event Management System
 */

/* CSS Variables */
:root {
  --primary-color: #1e3a8a;
  --primary-light: #3b82f6;
  --primary-dark: #1e40af;
  --secondary-color: #fbbf24;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
  --info-color: #3b82f6;
  --dark-color: #1f2937;
  --light-color: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --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);
  --border-radius: 0.375rem;
  --transition: all 0.3s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--light-color);
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

input, select, textarea {
  font-family: inherit;
  outline: none;
  transition: var(--transition);
}

/* Utility Classes */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.hidden {
  display: none !important;
}

/* Header */
.header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
  color: white;
  padding: 1rem 0;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  width: 2.7rem;
  height: 2.7rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.logo-icon img,
.college-logo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.login-header .logo-icon {
  width: 110px;
  height: 110px;
  margin: 0 auto 0.75rem;
  border-radius: 18px;
  background: transparent;
  box-shadow: none;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: white;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
}

.nav-links a:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-name {
  font-weight: 500;
}

.role-badge {
  background-color: var(--secondary-color);
  color: var(--dark-color);
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
}

/* Login Page */
.login-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 2rem;
}

.login-box {
  background: white;
  padding: 3rem;
  border-radius: 1rem;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 450px;
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-header h1 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
  font-size: 2rem;
}

.login-header p {
  color: var(--gray-600);
  font-size: 0.95rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--gray-700);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--gray-300);
  border-radius: var(--border-radius);
  font-size: 1rem;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 100px;
}

/* Buttons */
.btn {
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  font-weight: 500;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  display: inline-block;
}

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

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

.btn-secondary {
  background-color: var(--gray-600);
  color: white;
}

.btn-secondary:hover {
  background-color: var(--gray-700);
}

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

.btn-success:hover {
  background-color: #059669;
}

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

.btn-danger:hover {
  background-color: #dc2626;
}

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

.btn-full {
  width: 100%;
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Dashboard Layout */
.dashboard {
  display: flex;
  min-height: calc(100vh - 70px);
}

.sidebar {
  width: 250px;
  background-color: white;
  box-shadow: var(--shadow);
  padding: 2rem 0;
}

.sidebar-nav {
  list-style: none;
}

.sidebar-nav li {
  margin-bottom: 0.5rem;
}

.sidebar-nav a {
  display: block;
  padding: 0.75rem 1.5rem;
  color: var(--gray-700);
  font-weight: 500;
  border-left: 3px solid transparent;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background-color: var(--gray-100);
  border-left-color: var(--primary-color);
  color: var(--primary-color);
}

.main-content {
  flex: 1;
  padding: 2rem;
  background-color: var(--light-color);
}

/* Cards */
.card {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--gray-200);
}

.card-title {
  font-size: 1.5rem;
  color: var(--primary-color);
  font-weight: 600;
}

.card-body {
  padding: 1rem 0;
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
}

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

.stat-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.stat-icon.blue {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--primary-light);
}

.stat-icon.green {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
}

.stat-icon.yellow {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--warning-color);
}

.stat-icon.red {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--danger-color);
}

.stat-details h3 {
  font-size: 2rem;
  color: var(--gray-800);
  margin-bottom: 0.25rem;
}

.stat-details p {
  color: var(--gray-600);
  font-size: 0.95rem;
}

/* Tables */
.table-container {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: white;
}

.table thead {
  background-color: var(--gray-100);
}

.table th,
.table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}

.table th {
  font-weight: 600;
  color: var(--gray-700);
}

.table tbody tr:hover {
  background-color: var(--gray-100);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  font-weight: 600;
}

.badge-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
}

.badge-warning {
  background-color: rgba(245, 158, 11, 0.1);
  color: var(--warning-color);
}

.badge-danger {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--danger-color);
}

.badge-info {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--primary-light);
}

/* Event Cards */
.events-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.event-card {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
}

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

.event-card-header {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  color: white;
  padding: 1.5rem;
}

.event-card-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.event-card-type {
  background-color: rgba(255, 255, 255, 0.2);
  padding: 0.25rem 0.75rem;
  border-radius: 1rem;
  font-size: 0.875rem;
  display: inline-block;
}

.event-card-body {
  padding: 1.5rem;
}

.event-detail {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  color: var(--gray-700);
}

.event-card-footer {
  padding: 1rem 1.5rem;
  background-color: var(--gray-100);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Alerts */
.alert {
  padding: 1rem 1.5rem;
  border-radius: var(--border-radius);
  margin-bottom: 1rem;
  border-left: 4px solid;
}

.alert-success {
  background-color: rgba(16, 185, 129, 0.1);
  border-color: var(--success-color);
  color: #065f46;
}

.alert-error {
  background-color: rgba(239, 68, 68, 0.1);
  border-color: var(--danger-color);
  color: #991b1b;
}

.alert-warning {
  background-color: rgba(245, 158, 11, 0.1);
  border-color: var(--warning-color);
  color: #92400e;
}

.alert-info {
  background-color: rgba(59, 130, 246, 0.1);
  border-color: var(--primary-light);
  color: #1e40af;
}

/* Modal */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: white;
  border-radius: var(--border-radius);
  padding: 2rem;
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-title {
  font-size: 1.5rem;
  color: var(--primary-color);
}

.modal-close {
  background: none;
  font-size: 1.5rem;
  color: var(--gray-600);
  cursor: pointer;
}

/* Loading Spinner */
.spinner {
  border: 3px solid var(--gray-300);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 2rem auto;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .header-content {
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .header-content nav {
    width: 100%;
  }

  .nav-links {
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .nav-links a {
    padding: 0.4rem 0.6rem;
  }

  .main-content {
    padding: 1rem;
  }

  .dashboard {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    padding: 1rem 0;
  }

  .sidebar-nav a {
    padding: 0.5rem 1rem;
  }

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

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

  .table-container {
    overflow-x: scroll;
  }
}

/* Print Styles */
@media print {
  .header, .sidebar, .btn {
    display: none;
  }

  .main-content {
    padding: 0;
  }
}