:root {
      --primary: #1A2BC3;
      --secondary: #F8F9FA;
      --light-grey: #F5F7FA;
      --text: #1A1A1A;
      --text-secondary: #707070;
      --white: #FFFFFF;
      --success: #10B981;
      --warning: #F59E0B;
      --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
      --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
    }

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

    body {
      font-family: 'Roboto', sans-serif;
      background: var(--secondary);
      color: var(--text);
      overflow-x: hidden;
    }

    /* Hero Section */
    .projects-hero {
      background: linear-gradient(135deg, var(--primary) 0%, #0d1763 100%);
      padding: 100px 20px 60px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .projects-hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
      opacity: 0.4;
    }

    .hero-content {
      max-width: 800px;
      margin: 0 auto;
      position: relative;
      z-index: 1;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(10px);
      padding: 8px 20px;
      border-radius: 50px;
      color: var(--white);
      font-size: 14px;
      font-weight: 500;
      margin-bottom: 24px;
    }

    .hero-badge .material-symbols-outlined {
      font-size: 18px;
    }

    .hero-title {
      font-family: 'Montserrat', sans-serif;
      font-size: 42px;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 16px;
      line-height: 1.2;
    }

    .hero-description {
      font-size: 18px;
      color: rgba(255, 255, 255, 0.9);
      line-height: 1.6;
      margin-bottom: 32px;
    }

    .hero-stats {
      display: flex;
      justify-content: center;
      gap: 40px;
      flex-wrap: wrap;
    }

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

    .hero-stat-number {
      font-family: 'Montserrat', sans-serif;
      font-size: 32px;
      font-weight: 700;
      color: var(--white);
      display: block;
    }

    .hero-stat-label {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.8);
      margin-top: 4px;
    }

    /* Filter Section */
    .filter-section {
      max-width: 1200px;
      margin: -30px auto 40px;
      padding: 0 20px;
      position: relative;
      z-index: 2;
    }

    .filter-container {
      background: var(--white);
      border-radius: 20px;
      padding: 24px;
      box-shadow: var(--shadow-hover);
      display: flex;
      gap: 16px;
      align-items: center;
      flex-wrap: wrap;
      justify-content: center;
    }

    .filter-btn {
      padding: 12px 24px;
      border: 2px solid var(--light-grey);
      background: var(--white);
      color: var(--text-secondary);
      border-radius: 50px;
      font-family: 'Montserrat', sans-serif;
      font-weight: 600;
      font-size: 14px;
      cursor: pointer;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .filter-btn .material-symbols-outlined {
      font-size: 20px;
    }

    .filter-btn:hover,
    .filter-btn.active {
      background: var(--primary);
      color: var(--white);
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* Projects Grid */
    .projects-section {
      max-width: 1200px;
      margin: 0 auto;
      padding: 40px 20px 80px;
    }

    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-title {
      font-family: 'Montserrat', sans-serif;
      font-size: 36px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    .projects-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 32px;
    }

    .project-card {
      background: var(--white);
      border-radius: 20px;
      overflow: hidden;
      box-shadow: var(--shadow);
      transition: all 0.4s ease;
      cursor: pointer;
      position: relative;
    }

    .project-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
    }

    .project-card-header {
      background: linear-gradient(135deg, var(--primary) 0%, #0d1763 100%);
      padding: 32px 24px;
      position: relative;
      overflow: hidden;
    }

    .project-card-header::before {
      content: '';
      position: absolute;
      top: -50%;
      right: -50%;
      width: 200%;
      height: 200%;
      background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
      animation: pulse 4s ease-in-out infinite;
    }

    @keyframes pulse {
      0%, 100% { transform: scale(1); opacity: 0.5; }
      50% { transform: scale(1.1); opacity: 0.8; }
    }

    .project-icon {
      width: 64px;
      height: 64px;
      background: rgba(255, 255, 255, 0.2);
      backdrop-filter: blur(10px);
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      position: relative;
      z-index: 1;
    }

    .project-icon .material-symbols-outlined {
      font-size: 32px;
      color: var(--white);
    }

    .project-reg {
      font-family: 'Montserrat', sans-serif;
      font-size: 13px;
      font-weight: 600;
      color: rgba(255, 255, 255, 0.8);
      letter-spacing: 0.5px;
      position: relative;
      z-index: 1;
    }

    .project-card-body {
      padding: 24px;
    }

    .project-title {
      font-family: 'Montserrat', sans-serif;
      font-size: 18px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 12px;
      line-height: 1.3;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .project-meta {
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 16px;
    }

    .project-category {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      color: var(--text-secondary);
    }

    .project-category .material-symbols-outlined {
      font-size: 18px;
      color: var(--primary);
    }

    .project-student {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 12px 16px;
      background: var(--light-grey);
      border-radius: 12px;
      margin-bottom: 16px;
    }

    .project-student .material-symbols-outlined {
      font-size: 20px;
      color: var(--primary);
    }

    .project-student-text {
      font-size: 13px;
      color: var(--text-secondary);
      font-weight: 500;
    }

    .project-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-top: 16px;
      border-top: 1px solid var(--light-grey);
    }

    .view-details {
      display: flex;
      align-items: center;
      gap: 6px;
      color: var(--primary);
      font-weight: 600;
      font-size: 14px;
      transition: all 0.3s ease;
    }

    .view-details .material-symbols-outlined {
      font-size: 20px;
      transition: transform 0.3s ease;
    }

    .project-card:hover .view-details .material-symbols-outlined {
      transform: translateX(4px);
    }

    /* Modal */
    .modal-overlay {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(0, 0, 0, 0.7);
      backdrop-filter: blur(4px);
      z-index: 1000;
      animation: fadeIn 0.3s ease;
    }

    .modal-overlay.active {
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 20px;
    }

    @keyframes fadeIn {
      from { opacity: 0; }
      to { opacity: 1; }
    }

    .modal {
      background: var(--white);
      border-radius: 24px;
      max-width: 700px;
      width: 100%;
      max-height: 90vh;
      overflow-y: auto;
      position: relative;
      animation: slideUp 0.4s ease;
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    }

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

    .modal-header {
      background: linear-gradient(135deg, var(--primary) 0%, #0d1763 100%);
      padding: 40px 32px;
      position: relative;
      overflow: hidden;
    }

    .modal-header::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100%" height="100%" fill="url(%23dots)"/></svg>');
    }

    .modal-close {
      position: absolute;
      top: 16px;
      right: 16px;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.2);
      border: none;
      color: var(--white);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s ease;
      z-index: 1;
    }

    .modal-close:hover {
      background: rgba(255, 255, 255, 0.3);
      transform: rotate(90deg);
    }

    .modal-close .material-symbols-outlined {
      font-size: 24px;
    }

    .modal-icon {
      width: 80px;
      height: 80px;
      background: rgba(255, 255, 255, 0.2);
      backdrop-filter: blur(10px);
      border-radius: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      position: relative;
      z-index: 1;
    }

    .modal-icon .material-symbols-outlined {
      font-size: 40px;
      color: var(--white);
    }

    .modal-reg {
      font-family: 'Montserrat', sans-serif;
      font-size: 14px;
      font-weight: 600;
      color: rgba(255, 255, 255, 0.9);
      letter-spacing: 1px;
      position: relative;
      z-index: 1;
    }

    .modal-body {
      padding: 32px;
    }

    .modal-title {
      font-family: 'Montserrat', sans-serif;
      font-size: 24px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 20px;
      line-height: 1.3;
    }

    .modal-info-grid {
      display: grid;
      gap: 16px;
      margin-bottom: 24px;
    }

    .modal-info-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 16px;
      background: var(--light-grey);
      border-radius: 12px;
    }

    .modal-info-icon {
      width: 40px;
      height: 40px;
      background: var(--white);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .modal-info-icon .material-symbols-outlined {
      font-size: 22px;
      color: var(--primary);
    }

    .modal-info-content {
      flex: 1;
    }

    .modal-info-label {
      font-size: 13px;
      color: var(--text-secondary);
      font-weight: 500;
      margin-bottom: 4px;
    }

    .modal-info-value {
      font-size: 15px;
      color: var(--text);
      font-weight: 600;
    }

    .modal-description {
      margin-bottom: 24px;
    }

    .modal-description-title {
      font-family: 'Montserrat', sans-serif;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .modal-description-title .material-symbols-outlined {
      font-size: 20px;
      color: var(--primary);
    }

    .modal-description-text {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    .modal-actions {
      display: flex;
      gap: 12px;
    }

    .modal-btn {
      flex: 1;
      padding: 16px 24px;
      border: none;
      border-radius: 12px;
      font-family: 'Montserrat', sans-serif;
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

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

    .modal-btn-primary:hover {
      background: #0d1763;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(26, 43, 195, 0.3);
    }

    .modal-btn-secondary {
      background: var(--light-grey);
      color: var(--text);
    }

    .modal-btn-secondary:hover {
      background: #e8eaf0;
    }

    /* Responsive Design */
    @media (max-width: 768px) {
      .hero-title {
        font-size: 32px;
      }

      .hero-description {
        font-size: 16px;
      }

      .hero-stats {
        gap: 24px;
      }

      .hero-stat-number {
        font-size: 24px;
      }

      .filter-container {
        padding: 16px;
      }

      .section-title {
        font-size: 28px;
      }

      .projects-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .modal-body {
        padding: 24px;
      }

      .modal-title {
        font-size: 20px;
      }

      .modal-actions {
        flex-direction: column;
      }
    }

    @media (max-width: 480px) {
      .projects-hero {
        padding: 80px 20px 40px;
      }

      .hero-title {
        font-size: 28px;
      }

      .filter-container {
        flex-direction: column;
        align-items: stretch;
      }

      .filter-btn {
        justify-content: center;
      }
    }