/* ----- CUSTOM STYLES (override bootstrap & add uniqueness) ----- */
    :root {
      --primary-dark: #1a2b4c;
      --accent-blue: #4a90e2;
      --light-bg: #f8f9fa;
      --dark-text: #2c3e50;
      --transition: all 0.3s ease;
    }

    body {
      font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
      color: var(--dark-text);
      overflow-x: hidden;
    }

    /* sticky navbar with custom background */
    .navbar {
      background-color: var(--primary-dark) !important;
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      padding: 1rem 0;
    }
    .navbar-brand {
      font-weight: 700;
      color: white !important;
      font-size: 1.6rem;
      letter-spacing: -0.5px;
    }
    .navbar-brand span {
      color: var(--accent-blue);
    }
    .navbar-nav .nav-link {
      color: rgba(255,255,255,0.9) !important;
      font-weight: 500;
      margin: 0 0.5rem;
      position: relative;
      transition: var(--transition);
    }
    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
      color: white !important;
    }
    .navbar-nav .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--accent-blue);
      transition: width 0.3s;
    }
    .navbar-nav .nav-link:hover::after,
    .navbar-nav .nav-link.active::after {
      width: 70%;
    }
    .navbar-toggler {
      border-color: rgba(255,255,255,0.5);
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.9%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }

    /* buttons */
    .btn-primary-custom {
      background-color: var(--accent-blue);
      border: 2px solid var(--accent-blue);
      color: white;
      font-weight: 600;
      padding: 0.6rem 2rem;
      border-radius: 50px;
      transition: var(--transition);
    }
    .btn-primary-custom:hover {
      background-color: transparent;
      color: var(--accent-blue);
      border-color: var(--accent-blue);
    }
    .btn-outline-custom {
      background-color: transparent;
      border: 2px solid white;
      color: white;
      font-weight: 600;
      padding: 0.6rem 2rem;
      border-radius: 50px;
      transition: var(--transition);
    }
    .btn-outline-custom:hover {
      background-color: white;
      color: var(--primary-dark);
      border-color: white;
    }

    /* hero section */
    .hero {
      background: linear-gradient(135deg, rgba(26,43,76,0.9) 0%, rgba(74,144,226,0.8) 100%), 
                  url('https://images.unsplash.com/photo-1555066931-4365d14bab8c?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80');
      background-size: cover;
      background-position: center;
      min-height: 90vh;
      display: flex;
      align-items: center;
      margin-top: 76px; /* navbar height */
      color: white;
    }
    .hero h1 {
      font-size: 3.5rem;
      font-weight: 700;
      text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
    }

    /* section titles */
    .section-title {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 3rem;
      position: relative;
    }
    .section-title:after {
      content: '';
      display: block;
      width: 80px;
      height: 4px;
      background: var(--accent-blue);
      margin: 1rem auto 0;
      border-radius: 4px;
    }

    /* service cards */
    .service-card {
      background: white;
      padding: 2rem 1.5rem;
      border-radius: 20px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.05);
      transition: var(--transition);
      height: 100%;
      border-bottom: 5px solid transparent;
    }
    .service-card:hover {
      transform: translateY(-10px);
      border-bottom: 5px solid var(--accent-blue);
      box-shadow: 0 20px 40px rgba(74,144,226,0.15);
    }
    .service-icon {
      font-size: 3rem;
      color: var(--accent-blue);
      margin-bottom: 1.5rem;
    }

    /* portfolio cards */
    .portfolio-item {
      position: relative;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: 0 5px 20px rgba(0,0,0,0.1);
      margin-bottom: 30px;
    }
    .portfolio-item img {
      width: 100%;
      height: 250px;
      object-fit: cover;
      transition: transform 0.5s;
    }
    .portfolio-item:hover img {
      transform: scale(1.1);
    }
    .portfolio-overlay {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: linear-gradient(to top, rgba(26,43,76,0.95), transparent);
      color: white;
      padding: 1.5rem 1rem 0.8rem;
      transform: translateY(100%);
      transition: transform 0.4s;
    }
    .portfolio-item:hover .portfolio-overlay {
      transform: translateY(0);
    }
    .portfolio-overlay h4 {
      margin-bottom: 0.2rem;
      font-weight: 600;
    }

    /* about section */
    .about-img {
      border-radius: 30px;
      box-shadow: 0 20px 40px rgba(26,43,76,0.15);
    }

    /* contact section */
    .contact-section {
      background: var(--light-bg);
    }
    .contact-info-card {
      background: white;
      padding: 2rem;
      border-radius: 20px;
      height: 100%;
      box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    }
    .contact-info-item {
      display: flex;
      align-items: flex-start;
      margin-bottom: 1.8rem;
    }
    .contact-icon {
      width: 50px;
      height: 50px;
      background: rgba(74,144,226,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent-blue);
      font-size: 1.2rem;
      margin-right: 1rem;
    }
    .contact-detail h5 {
      color: var(--primary-dark);
      font-weight: 600;
      margin-bottom: 0.3rem;
    }
    .contact-detail p {
      color: #6c757d;
      margin-bottom: 0;
    }
    .form-control {
      border-radius: 50px;
      padding: 0.8rem 1.5rem;
      border: 2px solid #e9ecef;
      transition: var(--transition);
    }
    .form-control:focus {
      border-color: var(--accent-blue);
      box-shadow: none;
    }
    textarea.form-control {
      border-radius: 30px;
    }

    /* Testimonial / Client Logo Section */
    .client-logos {
      background: white;
      padding: 4rem 0;
      overflow: hidden;
    }
    .logo-slider {
      background: white;
      padding: 2rem 0;
    }
    .logo-track {
      display: flex;
      animation: scrollLogos 25s linear infinite;
      width: fit-content;
    }
    .logo-track:hover {
      animation-play-state: paused;
    }
    .logo-item {
      flex: 0 0 auto;
      width: 180px;
      margin: 0 2rem;
      display: flex;
      align-items: center;
      justify-content: center;
      filter: grayscale(100%);
      opacity: 0.7;
      transition: var(--transition);
    }
    .logo-item:hover {
      filter: grayscale(0);
      opacity: 1;
    }
    .logo-item img {
      max-width: 100%;
      height: auto;
      max-height: 60px;
      object-fit: contain;
    }

    @keyframes scrollLogos {
      0% {
        transform: translateX(0);
      }
      100% {
        transform: translateX(-50%);
      }
    }

    /* footer */
    .footer {
      background: var(--primary-dark);
      color: #adb5bd;
    }
    .footer a {
      color: #ced4da;
      text-decoration: none;
      transition: var(--transition);
    }
    .footer a:hover {
      color: var(--accent-blue);
    }
    .social-icons a {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: rgba(255,255,255,0.1);
      color: white;
      margin-left: 0.5rem;
      transition: var(--transition);
    }
    .social-icons a:hover {
      background: var(--accent-blue);
      color: white;
      transform: translateY(-3px);
    }

    /* fade-in animation (used with JS) */
    .fade-section {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.8s ease, transform 0.8s ease;
    }
    .fade-section.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* responsiveness tweaks */
    @media (max-width: 768px) {
      .hero h1 {
        font-size: 2.2rem;
      }
      .section-title {
        font-size: 2rem;
      }
      .contact-info-card {
        margin-bottom: 2rem;
      }
      .logo-item {
        width: 140px;
        margin: 0 1rem;
      }
      .footer .row {
        text-align: center;
      }
      .social-icons {
        margin-top: 1rem;
        justify-content: center !important;
      }
    }