/* ---------- GLOBAL ---------- */
body {
    font-family: 'Segoe UI', Tahoma, sans-serif;
    margin: 0;
    background: #ffffff;
    color: #333;
  }
  a {
    text-decoration: none;
  }
  
  /* ---------- HEADER NAV ---------- */
  .navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #ffffff;
    padding: 1rem 2rem;
    color: #333;
    border-bottom: 1px solid #e5e7eb;
  }
  .logo-text {
    font-size: 1.2rem;
    font-weight: bold;
    color: #1a365d;
  }
  .nav-right {
    display: flex;
    align-items: center;
    gap: 0.8rem;
  }
  .nav-btn {
    color: #2d3748;
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    border: 1.5px solid transparent;
    display: inline-block;
    white-space: nowrap;
    background: transparent;
    letter-spacing: 0.3px;
    text-transform: uppercase;
  }
  .nav-btn::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #1a365d, #4a90e2);
    transition: all 0.3s ease;
    transform: translateX(-50%);
  }
  .nav-btn:hover {
    color: #1a365d;
    background: linear-gradient(135deg, rgba(26,54,93,0.05), rgba(74,144,226,0.05));
    border-color: rgba(26,54,93,0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26,54,93,0.15);
  }
  .nav-btn:hover::before {
    width: 80%;
  }
  
  /* ---------- DROPDOWN STYLING ---------- */
  .dropdown {
    position: relative;
    display: inline-block;
  }
  .dropdown-toggle {
    cursor: pointer;
  }
  .dropdown-toggle::after {
    content: ' ▼';
    font-size: 0.65rem;
    margin-left: 0.4rem;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0.7;
  }
  .dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
    opacity: 1;
  }
  .dropdown-content {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    background: white;
    min-width: 220px;
    box-shadow: 0 8px 24px rgba(26,54,93,0.2);
    border-radius: 8px;
    border: 1px solid rgba(26,54,93,0.1);
    z-index: 1000;
    overflow: hidden;
    backdrop-filter: blur(10px);
  }
  .dropdown:hover .dropdown-content {
    display: block;
    animation: fadeInDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .dropdown-content a {
    color: #2d3748;
    padding: 0.9rem 1.4rem;
    text-decoration: none;
    display: block;
    transition: all 0.2s ease;
    border-bottom: 1px solid rgba(26,54,93,0.05);
    font-weight: 500;
    font-size: 0.9rem;
  }
  .dropdown-content a:last-child {
    border-bottom: none;
  }
  .dropdown-content a:hover {
    background: linear-gradient(135deg, rgba(26,54,93,0.05), rgba(74,144,226,0.05));
    color: #1a365d;
    padding-left: 1.6rem;
    font-weight: 600;
  }
  @keyframes fadeInDown {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* ---------- HERO SECTION ---------- */
  .hero {
    background-image: url('../img/NL Flag lint.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    padding: 2rem 2rem;
    text-align: center;
    color: #1a365d;
    position: relative;
    overflow: hidden;
  }
  .hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.75);
    z-index: 0;
  }
  .hero .hero-content {
    position: relative;
    z-index: 1;
  }
  .hero-logo {
    width: 320px;
    height: auto;
    margin-bottom: 2rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
    border-radius: 10px;
    border-top-left-radius: 10px;
    border-top-right-radius: 10px;
    border-bottom-right-radius: 10px;
    border-bottom-left-radius: 10px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4), 0 4px 15px rgba(22, 60, 167, 0.3);
  }
  .hero-content h1 {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: #1a365d;
    text-shadow: 0 2px 4px rgba(255, 255, 255, 0.8);
  }
  .hero-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: #1a365d;
    text-shadow: 0 2px 4px rgba(255, 255, 255, 0.8);
  }
  .hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #2d3748;
    opacity: 0.9;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
  }
  .btn-hero {
    background: #387bd9;
    color: white;
    padding: 0.5rem 2rem;
    border-radius: 25px;
    font-weight: bold;
    font-size: 1.1rem;
    border: 2px solid #0c499d;
    display: inline-block;
    transition: all 0.3s;
  }
  .btn-hero:hover {
    background: #52ba86;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26,54,93,0.3);
  }
  
  /* ---------- COURSES SECTION ---------- */
  .courses-section {
    padding: 3rem 2rem;
    background: white;
  }
  .container {
    max-width: 1200px;
    margin: 0 auto;
  }
  .section-title {
    text-align: center;
    font-size: 2.2rem;
    font-weight: 600;
    color: #1a365d;
    margin-bottom: 2.5rem;
    letter-spacing: 0.5px;
  }
  .course-cards {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    max-width: 800px;
    margin: 0 auto;
  }
  .course-card {
    background: linear-gradient(135deg, #4a90e2, #1a365d);
    color: white;
    padding: 0.75rem;
    border-radius: 12px;
    width: 300px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(26,54,93,0.15);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255,255,255,0.1);
  }
  .course-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(26,54,93,0.25);
  }
  .course-card h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: white;
    letter-spacing: 0.5px;
  }
  .course-card p {
    font-size: 0.7rem;
    margin-bottom: 0.6rem;
    color: white;
    opacity: 0.95;
    line-height: 1.4;
  }
  .course-link {
    color: white;
    font-weight: 500;
    text-decoration: underline;
    font-size: 0.7rem;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    transition: background-color 0.2s;
  }
  .course-link:hover {
    background-color: rgba(255,255,255,0.1);
    opacity: 1;
  }
  
  /* ---------- CONTACT SECTION ---------- */
  .contact-section {
    padding: 3rem 2rem;
    background: white;
  }
  .contact-title {
    text-align: center;
    font-size: 2.2rem;
    font-weight: 600;
    color: #1a365d;
    margin-bottom: 2.5rem;
    letter-spacing: 0.5px;
  }
  .contact-cards {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: nowrap;
    max-width: 500px;
    margin: 0 auto;
  }
  .contact-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    padding: 0.75rem;
    border-radius: 8px;
    text-align: center;
    width: 154px;
    box-shadow: 0 2px 8px rgba(26,54,93,0.1), 0 1px 3px rgba(0,0,0,0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1.5px solid rgba(26,54,93,0.1);
    position: relative;
    overflow: hidden;
  }
  .contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #1a365d, #4a90e2);
    transform: scaleX(0);
    transition: transform 0.3s ease;
  }
  .contact-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(26,54,93,0.2), 0 3px 8px rgba(0,0,0,0.1);
    border-color: rgba(26,54,93,0.3);
    background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
  }
  .contact-card:hover::before {
    transform: scaleX(1);
  }
  .contact-card h3 {
    color: #1a365d;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    position: relative;
    z-index: 1;
  }
  .contact-card p {
    color: #4a5568;
    font-size: 0.65rem;
    line-height: 1.4;
    margin: 0;
    font-weight: 500;
    position: relative;
    z-index: 1;
  }
  
  /* ---------- FOOTER ---------- */
  footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 2rem;
  }
  footer p {
    margin: 0;
    font-size: 0.9rem;
  }
  
  /* ---------- FORM SECTION ---------- */
  .form-section {
    max-width: 800px;
    margin: 3rem auto;
    background: white;
    padding: 2.5rem 3rem;
    border-radius: 15px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.1);
  }
  .form-section h2 {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
  }
  .form-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }
  .form-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
  }
  .form-group {
    flex: 1;
    display: flex;
    flex-direction: column;
  }
  .form-group.full {
    width: 100%;
  }
  .form-group label {
    font-weight: 600;
    margin-bottom: 0.4rem;
  }
  .form-group input,
  .form-group select,
  .form-group textarea {
    border: 1px solid #ccc;
    border-radius: 8px;
    padding: 0.7rem;
    font-size: 1rem;
    transition: border 0.3s;
  }
  .form-group input:focus,
  .form-group select:focus,
  .form-group textarea:focus {
    border-color: #1a365d;
    outline: none;
    box-shadow: 0 0 0 2px rgba(26,54,93,0.2);
  }
  .btn-submit {
    background: linear-gradient(135deg, #1a365d, #2c5282);
    color: white;
    border: none;
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    font-weight: bold;
    border-radius: 8px;
    text-transform: uppercase;
    cursor: pointer;
    transition: 0.3s;
  }
  .btn-submit:hover {
    opacity: 0.9;
  }
  
  /* ---------- THANK YOU PAGE ---------- */
  .thanks-body {
    background: linear-gradient(135deg, #4a90e2, #1a365d);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
  }
  .thanks {
    background: white;
    padding: 3rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
  }
  .thanks-logo {
    width: 160px;
    margin-bottom: 1rem;
  }
  .thanks h2 {
    color: #1a365d;
    margin-bottom: 0.5rem;
  }
  .thanks p {
    color: #555;
    margin-bottom: 1.5rem;
  }
  .thanks .btn {
    background: linear-gradient(135deg, #1a365d, #2c5282);
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-weight: bold;
  }
  .thanks .btn:hover {
    opacity: 0.9;
  }
  
  /* ---------- ADMIN LOGIN ---------- */
  .login-body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #4a90e2, #1a365d);
  }
  .login-card {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    width: 350px;
    text-align: center;
  }
  .login-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
  }
  .login-logo {
    text-align: center;
    margin-bottom: 1rem;
  }
  .logo-image {
    max-width: 120px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  }
  .login-title {
    font-size: 1.6rem;
    color: #1a365d;
    margin-bottom: 1rem;
  }
  .login-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.2rem;
  }
  .login-form input {
    padding: 0.6rem;
    border: 1px solid #ddd;
    border-radius: 8px;
  }
  .login-btn {
    background: linear-gradient(135deg, #1a365d, #2c5282);
    color: white;
    border: none;
    padding: 0.8rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
  }
  .login-btn:hover {
    opacity: 0.9;
  }
  
  /* ---------- ADMIN DASHBOARD ---------- */
  .dashboard-body {
    background: #f4f6fb;
  }
  .admin-header {
    background: linear-gradient(135deg, #1a365d, #2c5282);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .admin-controls {
    display: flex;
    gap: 10px;
  }
  .btn {
    background: #1a365d;
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0.5rem 1rem;
    cursor: pointer;
  }
  .btn:hover { opacity: 0.9; }
  .btn.danger { background: #e11d48; }
  .btn.danger:hover { background: #be123c; }
  .stats-container {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin: 1.5rem auto;
    flex-wrap: wrap;
    max-width: 800px;
  }
  .stat-card {
    background: white;
    padding: 0.8rem 1.2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    text-align: center;
    width: 140px;
    border: 1px solid #f0f0f0;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
  }
  .stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
  }
  .stat-card h2 {
    font-size: 1.5rem;
    color: #1a365d;
    margin: 0 0 0.2rem 0;
    font-weight: 700;
  }
  .stat-card p {
    margin: 0;
    font-size: 0.85rem;
    color: #666;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
  }
  .table-section {
    width: 90%;
    margin: auto;
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
  }
  table {
    width: 100%;
    border-collapse: collapse;
  }
  th, td {
    padding: 0.5rem 0.8rem;
    text-align: left;
    border-bottom: 1px solid #eee;
  }
  th {
    background: #1a365d;
    color: white;
  }
  tr:hover { background: #f0f8ff; }
  
  /* ---------- DASHBOARD FILTERS ---------- */
  .filters {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 1.5rem auto;
    max-width: 90%;
    gap: 1rem;
    flex-wrap: wrap;
  }
  .filters input {
    flex: 1;
    min-width: 250px;
    padding: 0.7rem 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 0.9rem;
    background: white;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }
  .filters input:focus {
    outline: none;
    border-color: #1a365d;
    box-shadow: 0 0 0 3px rgba(26,54,93,0.1);
  }
  .filter-buttons {
    display: flex;
    gap: 0.5rem;
  }
  .filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid #ddd;
    background: white;
    color: #666;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
  }
  .filter-btn:hover {
    background: #f0f8ff;
    border-color: #1a365d;
  }
  .filter-btn.active {
    background: #1a365d;
    color: white;
    border-color: #1a365d;
  }
  
  /* ---------- MODAL STYLING ---------- */
  .modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: none !important;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
  }
  .modal-overlay.show {
    display: flex !important;
  }
  .modal {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
  }
  .modal h2 {
    color: #333;
    margin: 0 0 1.5rem 0;
    font-size: 1.4rem;
    font-weight: 600;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 0.5rem;
  }
  .modal p {
    margin: 0.8rem 0;
    font-size: 0.95rem;
    line-height: 1.5;
  }
  .modal strong {
    color: #1a365d;
    font-weight: 600;
    display: inline-block;
    min-width: 80px;
  }
  .modal .btn {
    margin-top: 1.5rem;
    padding: 0.7rem 1.5rem;
    font-size: 0.9rem;
  }
  
  /* ---------- TABLE IMPROVEMENTS ---------- */
  .table-section {
    margin-top: 1rem;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    border: 1px solid #f0f0f0;
  }
  table {
    font-size: 0.9rem;
  }
  th {
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.6rem 0.8rem;
  }
  td {
    padding: 0.5rem 0.8rem;
    vertical-align: middle;
  }
  select {
    padding: 0.4rem 0.6rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.85rem;
    background: white;
    transition: border-color 0.2s ease;
  }
  select:focus {
    outline: none;
    border-color: #1a365d;
  }
  .btn.small {
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
    margin: 0 0.1rem;
    border-radius: 4px;
  }
  
  /* ---------- RESPONSIVE IMPROVEMENTS ---------- */
  @media (max-width: 768px) {
    .navbar {
      flex-direction: column;
      gap: 1rem;
      padding: 1rem;
    }
    .nav-right {
      flex-wrap: wrap;
      justify-content: center;
      gap: 0.4rem;
    }
    .nav-btn {
      padding: 0.65rem 1.2rem;
      font-size: 0.8rem;
    }
    .dropdown-content {
      position: static;
      display: block;
      box-shadow: none;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      margin-top: 0.5rem;
    }
    .dropdown:hover .dropdown-content {
      display: block;
    }
    .hero-logo {
      width: 280px;
      margin-bottom: 1.5rem;
    }
    .hero-content h1 {
      font-size: 2.2rem;
    }
    .hero-content p {
      font-size: 1rem;
    }
    .course-cards {
      gap: 1rem;
    }
    .course-card {
      width: 100%;
      max-width: 150px;
    }
    .contact-cards {
      gap: 0.5rem;
      flex-wrap: wrap;
    }
    .contact-card {
      width: 154px;
      max-width: 154px;
    }
    .stats-container {
      gap: 0.5rem;
      margin: 1rem auto;
    }
    .stat-card {
      width: 120px;
      padding: 0.6rem 0.8rem;
    }
    .stat-card h2 {
      font-size: 1.3rem;
    }
    .filters {
      flex-direction: column;
      align-items: stretch;
    }
    .filters input {
      min-width: auto;
    }
    .filter-buttons {
      justify-content: center;
    }
    .table-section {
      width: 95%;
      padding: 1rem;
    }
    .admin-header {
      flex-direction: column;
      gap: 1rem;
      text-align: center;
    }
    .admin-controls {
      justify-content: center;
    }
  }