:root {
      --color-bg: #ffffff;
      --color-text-primary: #111827;
      --color-text-secondary: #6b7280;
      --color-primary: #2563eb;
      --color-primary-dark: #1e40af;
      --color-shadow: rgba(0,0,0,0.05);
      --border-radius: 0.75rem;
      --transition-speed: 0.3s;
      --max-width: 1200px;
    }
    /* Reset and base */
    *, *::before, *::after {
      box-sizing: border-box;
    }
    body {
      margin: 0; padding: 0;
      font-family: 'Poppins', sans-serif;
      background: var(--color-bg);
      color: var(--color-text-primary);
      line-height: 1.6;
      font-size: 18px;
      scroll-behavior: smooth;
    }
    a {
      color: var(--color-primary);
      text-decoration: none;
      transition: color var(--transition-speed);
    }
    a:hover,
    a:focus {
      color: var(--color-primary-dark);
      outline: none;
    }
    img {
      max-width: 100%;
      display: block;
      border-radius: var(--border-radius);
      object-fit: cover;
    }

    /* Container max width center */
    .container {
      max-width: var(--max-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }

    /* Sticky top nav */
    header {
      position: sticky;
      top: 0;
      background: var(--color-bg);
      box-shadow: 0 2px 8px var(--color-shadow);
      z-index: 100;
    }
    nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1rem 0;
    }
    .logo {
      font-weight: 800;
      font-size: 1.5rem;
      color: var(--color-primary);
      letter-spacing: 2px;
      user-select: none;
    }
    .nav-links {
      display: flex;
      gap: 1.5rem;
      font-weight: 600;
      align-items: center;
    }
    .nav-links a,
    .nav-links button {
      position: relative;
      padding-bottom: 3px;
      font-family: inherit;
      font-weight: 600;
      font-size: 1rem;
      background: none;
      border: none;
      cursor: pointer;
      color: var(--color-primary);
      transition: color var(--transition-speed);
    }
    .nav-links a::after {
      content: "";
      position: absolute;
      left: 0; bottom: 0;
      width: 0%;
      height: 2px;
      background: var(--color-primary);
      transition: width var(--transition-speed);
      border-radius: 1px;
    }
    .nav-links a:hover::after,
    .nav-links a:focus::after {
      width: 100%;
    }
    .nav-links button:hover,
    .nav-links button:focus {
      color: var(--color-primary-dark);
      outline: none;
    }

    /* Hero */
    .hero {
      text-align: center;
      padding: 5rem 1rem 6rem;
      background: linear-gradient(135deg, #eef2ff, #e0e7ff);
      border-radius: var(--border-radius);
      margin-bottom: 4rem;
      box-shadow: 0 8px 16px var(--color-shadow);
    }
    .hero h1 {
      font-size: 3.5rem;
      font-weight: 800;
      margin: 0 0 1rem;
      color: var(--color-primary-dark);
    }
    .hero p {
      font-size: 1.25rem;
      color: var(--color-text-secondary);
      margin-bottom: 2rem;
      max-width: 680px;
      margin-left: auto;
      margin-right: auto;
    }
    .btn-primary {
      background-color: var(--color-primary);
      color: white;
      font-weight: 700;
      font-size: 1.125rem;
      padding: 0.75rem 2rem;
      border: none;
      border-radius: var(--border-radius);
      cursor: pointer;
      transition: background-color var(--transition-speed), transform 0.3s;
      box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
    }
    .btn-primary:hover,
    .btn-primary:focus {
      background-color: var(--color-primary-dark);
      transform: scale(1.05);
      outline: none;
    }

    /* Section titles */
    h2.section-title {
      font-weight: 700;
      font-size: 2.5rem;
      text-align: center;
      margin-bottom: 3rem;
      color: var(--color-primary-dark);
    }

    /* About Section */
    #about {
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
      color: var(--color-text-secondary);
      font-size: 1.125rem;
      line-height: 1.8;
      padding-bottom: 4rem;
    }

    /* Services Section */
    #services .cards {
      display: grid;
      grid-template-columns: repeat(auto-fit,minmax(280px,1fr));
      gap: 2rem;
      padding-bottom: 4rem;
    }
    .card-service {
      background: white;
      box-shadow: 0 4px 12px var(--color-shadow);
      padding: 2rem;
      border-radius: var(--border-radius);
      transition: transform var(--transition-speed), box-shadow var(--transition-speed);
      cursor: default;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }
    .card-service:hover,
    .card-service:focus-within {
      transform: translateY(-6px);
      box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
      outline: none;
    }
    .card-icon {
      background: var(--color-primary);
      color: white;
      font-size: 2rem;
      width: 56px;
      height: 56px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      margin-bottom: 1rem;
      user-select: none;
    }
    .card-title {
      font-weight: 700;
      font-size: 1.25rem;
      margin-bottom: 0.5rem;
      color: var(--color-primary-dark);
    }
    .card-desc {
      color: var(--color-text-secondary);
      font-size: 1rem;
      line-height: 1.6;
    }

    /* Events Section */
    #events {
      padding-bottom: 4rem;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
      color: var(--color-text-secondary);
    }
    #events ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    #events li {
      padding: 1rem 1.5rem;
      border-radius: var(--border-radius);
      margin-bottom: 1rem;
      background: white;
      box-shadow: 0 4px 10px var(--color-shadow);
      transition: box-shadow var(--transition-speed);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    #events li:hover {
      box-shadow: 0 12px 30px rgba(37, 99, 235, 0.25);
    }
    .event-name {
      font-weight: 600;
      font-size: 1.125rem;
      color: var(--color-primary-dark);
    }
    .event-date {
      font-size: 0.875rem;
      color: var(--color-text-secondary);
      font-style: italic;
      white-space: nowrap;
    }

    /* Gallery rollover images */
    #gallery {
      max-width: var(--max-width);
      margin-left: auto;
      margin-right: auto;
      padding-bottom: 4rem;
    }
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 1.75rem;
      cursor: pointer;
    }
    .gallery-item {
      position: relative;
      border-radius: var(--border-radius);
      overflow: hidden;
      box-shadow: 0 4px 10px var(--color-shadow);
      transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    }
    .gallery-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: opacity var(--transition-speed);
      display: block;
      border-radius: var(--border-radius);
    }
    .gallery-item:hover,
    .gallery-item:focus-within {
      transform: scale(1.03);
      box-shadow: 0 12px 26px rgba(37, 99, 235, 0.25);
      outline: none;
    }
    .gallery-item .img-top,
    .gallery-item .img-bottom {
      position: absolute;
      top: 0; left: 0; width: 100%; height: 100%;
      border-radius: var(--border-radius);
      object-fit: cover;
      pointer-events: none;
      user-select: none;
    }
    .gallery-item .img-bottom {
      opacity: 1;
      transition: opacity var(--transition-speed);
    }
    .gallery-item:hover .img-bottom,
    .gallery-item:focus-within .img-bottom {
      opacity: 0;
    }
    .gallery-item .img-top {
      opacity: 0;
      transition: opacity var(--transition-speed);
    }
    .gallery-item:hover .img-top,
    .gallery-item:focus-within .img-top {
      opacity: 1;
    }

    /* Contact Section */
    #contact {
      max-width: 480px;
      margin-left: auto;
      margin-right: auto;
      padding-bottom: 6rem;
    }
    form {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }
    label {
      display: block;
      font-weight: 600;
      margin-bottom: 0.4rem;
      color: var(--color-primary-dark);
    }
    input, textarea {
      font-family: 'Poppins', sans-serif;
      font-size: 1rem;
      padding: 0.75rem 1rem;
      border: 1.5px solid #d1d5db;
      border-radius: var(--border-radius);
      transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
      resize: vertical;
    }
    input:focus, textarea:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 4px 2px rgba(37, 99, 235, 0.3);
      outline: none;
    }
    textarea {
      min-height: 100px;
    }
    button[type="submit"] {
      background-color: var(--color-primary);
      color: #fff;
      font-weight: 700;
      font-size: 1.125rem;
      padding: 0.75rem 2rem;
      border: none;
      border-radius: var(--border-radius);
      cursor: pointer;
      transition: background-color var(--transition-speed), transform 0.3s;
      box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
      align-self: center;
    }
    button[type="submit"]:hover,
    button[type="submit"]:focus {
      background-color: var(--color-primary-dark);
      transform: scale(1.05);
      outline: none;
    }

    /* Modal styles */
    .modal-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.3);
      backdrop-filter: blur(4px) saturate(180%);
      display: none;
      align-items: center;
      justify-content: center;
      z-index: 200;
    }
    .modal-overlay.active {
      display: flex;
    }
    .modal {
      background: var(--color-bg);
      border-radius: var(--border-radius);
      padding: 2rem 2.5rem;
      max-width: 400px;
      width: 90%;
      box-shadow: 0 12px 28px rgba(37, 99, 235, 0.3);
      position: relative;
    }
    .modal h2 {
      margin-top: 0;
      margin-bottom: 1.5rem;
      font-weight: 800;
      font-size: 2rem;
      color: var(--color-primary-dark);
      text-align: center;
    }
    .modal form {
      display: flex;
      flex-direction: column;
      gap: 1.25rem;
    }
    .modal label {
      font-weight: 600;
      color: var(--color-primary-dark);
      margin-bottom: 0.4rem;
    }
    .modal input {
      font-family: 'Poppins', sans-serif;
      font-size: 1rem;
      padding: 0.75rem 1rem;
      border: 1.5px solid #d1d5db;
      border-radius: var(--border-radius);
      transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
      width: 100%;
    }
    .modal input:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 4px 2px rgba(37, 99, 235, 0.3);
      outline: none;
    }
    .modal-buttons {
      display: flex;
      justify-content: flex-end;
      gap: 1rem;
      margin-top: 1rem;
    }
    .btn-cancel {
      background: #e5e7eb;
      color: var(--color-text-primary);
      font-weight: 600;
      border: none;
      padding: 0.75rem 1.5rem;
      border-radius: var(--border-radius);
      cursor: pointer;
      transition: background-color var(--transition-speed);
    }
    .btn-cancel:hover,
    .btn-cancel:focus {
      background: #d1d5db;
      outline: none;
    }
    .btn-login {
      background-color: var(--color-primary);
      color: white;
      font-weight: 700;
      padding: 0.75rem 1.75rem;
      border: none;
      border-radius: var(--border-radius);
      cursor: pointer;
      transition: background-color var(--transition-speed), transform 0.3s;
    }
    .btn-login:hover,
    .btn-login:focus {
      background-color: var(--color-primary-dark);
      outline: none;
      transform: scale(1.05);
    }
    /* Responsive */
    @media (max-width: 600px) {
      .hero h1 {
        font-size: 2.25rem;
      }
      .nav-links {
        font-size: 0.95rem;
        gap: 1rem;
      }
    }