* {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    }
    body {
      background: linear-gradient(145deg, #f6f9fc 0%, #e9f0f7 100%);
      min-height: 100vh;
      margin: 0;
      display: flex;
      flex-direction: column;
    }
    /* soft, luxurious navbar */
    .navbar {
      background: rgba(255,255,255,0.75);
      backdrop-filter: blur(12px) saturate(180%);
      -webkit-backdrop-filter: blur(12px) saturate(180%);
      box-shadow: 0 12px 35px -8px rgba(0,20,40,0.15), 0 4px 12px rgba(0,0,0,0.05);
      border-bottom: 1px solid rgba(255,255,255,0.5);
      padding: 0.8rem 1.5rem;
      transition: all 0.2s ease;
    }
    .navbar-brand {
      font-weight: 600;
      letter-spacing: -0.02em;
      color: #1a2e45 !important;
      font-size: 1.65rem;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .navbar-brand i {
      color: #2f5e8c;
      font-size: 1.8rem;
      filter: drop-shadow(0 3px 4px rgba(0,60,130,0.2));
    }
    /* main menu items */
    .navbar-nav .nav-link {
      font-weight: 500;
      font-size: 1.1rem;
      color: #1e3b5c !important;
      padding: 0.7rem 1.2rem !important;
      border-radius: 50px;
      margin: 0 3px;
      transition: all 0.2s ease;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .navbar-nav .nav-link i {
      font-size: 1.2rem;
      color: #2f6e9e;
      transition: transform 0.2s;
    }
    .navbar-nav .nav-link:hover {
      background: rgba(45, 100, 150, 0.08);
      color: #0f2b44 !important;
    }
    .navbar-nav .nav-link:hover i {
      transform: translateY(-1px);
      color: #1c4b77;
    }
    /* dropdown (submenu) container — beautiful glass */
    .dropdown-menu {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(16px) saturate(200%);
      -webkit-backdrop-filter: blur(16px) saturate(200%);
      border: 1px solid rgba(255,255,255,0.8);
      border-radius: 24px;
      box-shadow: 0 25px 40px -12px rgba(0,35,70,0.25), 0 8px 18px rgba(0,30,50,0.1);
      padding: 0.7rem 0.3rem;
      margin-top: 10px !important;
      min-width: 230px;
      animation: fadeInUp 0.2s ease-out;
    }
    @keyframes fadeInUp {
      from { opacity: 0.7; transform: translateY(8px); }
      to { opacity: 1; transform: translateY(0); }
    }
    /* submenu items */
    .dropdown-item {
      border-radius: 40px;
      padding: 0.6rem 1.5rem;
      margin: 4px 8px;
      font-weight: 470;
      color: #1f3b58;
      display: flex;
      align-items: center;
      gap: 10px;
      transition: 0.18s;
    }
    .dropdown-item i {
      width: 1.6rem;
      color: #2e6291;
      font-size: 1.15rem;
    }
    .dropdown-item:hover {
      background: rgba(45, 110, 170, 0.12);
      color: #0c2942;
      transform: translateX(4px);
    }
    /* nested submenu (2nd level) — appears on right side on desktop */
    .dropdown-submenu {
      position: relative;
    }
    .dropdown-submenu > .dropdown-menu {
      top: 0;
      left: 100%;
      margin-top: -8px;
      margin-left: 2px;
      display: none;
      border-radius: 22px;
      background: rgba(250, 252, 255, 0.9);
      backdrop-filter: blur(14px);
      border: 1px solid rgba(255,255,255,0.9);
    }
    .dropdown-submenu:hover > .dropdown-menu {
      display: block;
    }
    /* indicator for items with submenu */
    .dropdown-submenu .dropdown-toggle::after {
      content: "\f054";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      border: none;
      vertical-align: middle;
      font-size: 0.75rem;
      margin-left: 0.8rem;
      color: #3b6a97;
      opacity: 0.8;
    }
    /* override bootstrap default arrow for main dropdown */
    .nav-link.dropdown-toggle::after {
      content: "\f078";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      border: none;
      font-size: 0.7rem;
      vertical-align: middle;
      margin-left: 6px;
      color: inherit;
    }
    /* mobile adjustments */
    @media (max-width: 991.98px) {
      .navbar-collapse {
        background: rgba(255,255,255,0.75);
        backdrop-filter: blur(20px);
        border-radius: 32px;
        padding: 1rem 1rem;
        margin-top: 0.8rem;
        box-shadow: 0 18px 35px -10px rgba(0,30,50,0.2);
        border: 1px solid rgba(255,255,255,0.6);
      }
      .dropdown-submenu > .dropdown-menu {
        position: static;
        float: none;
        width: auto;
        margin-top: 8px;
        margin-left: 20px;
        background: rgba(240, 246, 255, 0.7);
        backdrop-filter: blur(10px);
        box-shadow: none;
        border: 1px solid rgba(0,0,0,0.05);
      }
      .dropdown-submenu:hover > .dropdown-menu {
        display: none;  /* avoid accidental hover on mobile */
      }
      .dropdown-submenu .dropdown-menu.show {
        display: block !important;  /* jquery toggles */
      }
      .navbar-nav .nav-link {
        padding-left: 1.2rem !important;
      }
    }
    /* demo content */
    .hero-section {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 2rem 1.5rem;
      color: #1d3d5c;
    }
    .hero-card {
      background: rgba(255,255,255,0.4);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border-radius: 48px;
      padding: 2.8rem 2.5rem;
      box-shadow: 0 30px 50px -20px rgba(20,50,80,0.3);
      border: 1px solid rgba(255,255,255,0.5);
      max-width: 700px;
    }
    .hero-card h1 {
      font-weight: 620;
      font-size: 2.6rem;
      letter-spacing: -0.02em;
      margin-bottom: 1rem;
    }
    .hero-card p {
      font-size: 1.2rem;
      opacity: 0.9;
    }
    .icon-ring {
      display: inline-block;
      background: #ffffffaa;
      border-radius: 100px;
      padding: 8px 18px;
      font-size: 1rem;
      color: #1b4c7c;
      border: 1px solid white;
      margin-top: 20px;
    }
     /* ---------- FOOTER (elegant, responsive) ---------- */
    .footer {
      background: #0f1a2f;
      color: #d3e0f0;
      padding: 3rem 2rem 1.5rem;
      border-top-left-radius: 48px;
      border-top-right-radius: 48px;
      margin-top: 2rem;
    }
    .footer h5 {
      color: white;
      font-weight: 600;
      letter-spacing: -0.3px;
      margin-bottom: 1.4rem;
    }
    .footer a {
      color: #b2c9f0;
      text-decoration: none;
      transition: 0.2s;
      display: inline-flex;
      align-items: center;
      margin: 0.4rem 0;
    }
    .footer a:hover {
      color: white;
      transform: translateX(5px);
    }
    .footer i {
      margin-right: 10px;
      font-size: 1.3rem;
      color: #6d8fd1;
    }
    .footer .social-icons i {
      font-size: 1.8rem;
      margin: 0 15px 0 0;
      color: #cedffc;
      transition: 0.15s;
    }
    .footer .social-icons a:hover i {
      color: white;
      transform: scale(1.1);
    }
    .footer hr {
      border-color: #2a3b58;
      opacity: 0.4;
    }
    .copyright {
      color: #8fa2c0;
      font-size: 0.95rem;
    }
    /* active nav simulation */
    .nav-item.active .nav-link {
      background: rgba(44, 62, 143, 0.12);
      font-weight: 600;
    }
/* ---------- elegant contact section ---------- */
    .contact-section {
      background: linear-gradient(145deg, #ffffff 0%, #f2f6fd 100%);
      border-radius: 48px 48px 48px 48px;
      margin: 2rem 1.5rem;
      padding: 3rem 2rem 3rem 2rem;
      box-shadow: 0 20px 40px -12px rgba(0,30,60,0.12);
      border: 1px solid rgba(255,255,255,0.6);
    }
    .section-headline {
      font-weight: 700;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, #162b4e, #27408b);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      font-size: clamp(2.2rem, 8vw, 3.2rem);
      margin-bottom: 0.5rem;
    }
    .section-subhead {
      color: #3f506e;
      font-size: 1.2rem;
      font-weight: 400;
    }

    /* contact info cards (soft glass) */
    .contact-info-card {
      background: rgba(255,255,255,0.7);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border-radius: 32px;
      padding: 1.6rem 1.4rem;
      border: 1px solid rgba(255,255,255,0.8);
      box-shadow: 0 8px 18px -6px rgba(0,40,70,0.08);
      transition: 0.2s ease;
      height: 100%;
    }
    .contact-info-card:hover {
      transform: translateY(-5px);
      background: rgba(255,255,255,0.85);
      border-color: rgba(140, 175, 255, 0.3);
    }
    .info-icon {
      width: 56px;
      height: 56px;
      background: rgba(55, 80, 160, 0.1);
      border-radius: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
      color: #25407c;
      margin-bottom: 1.2rem;
    }
    .info-title {
      font-weight: 600;
      font-size: 1.4rem;
      color: #0b1c3a;
    }
    .info-detail {
      color: #2f405e;
      font-size: 1.1rem;
      line-height: 1.4;
      margin-top: 0.4rem;
      word-break: break-word;
    }
    .info-detail i {
      font-size: 1rem;
      margin-right: 6px;
      color: #3d5a9b;
    }

    /* ----- BEAUTIFUL FORM (elevated) ----- */
    .form-card {
      background: #ffffffd9;
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-radius: 40px;
      padding: 2.4rem 2rem;
      border: 1px solid rgba(255,255,255,0.9);
      box-shadow: 0 25px 45px -20px rgba(18, 35, 70, 0.25);
    }
    .form-label {
      font-weight: 600;
      color: #1b2c4b;
      margin-bottom: 0.4rem;
      font-size: 1rem;
      letter-spacing: -0.2px;
    }
    .input-field {
      border: 1.5px solid #e2eaf5;
      border-radius: 24px;
      padding: 0.8rem 1.3rem;
      font-size: 1rem;
      transition: all 0.2s;
      background: white;
      width: 100%;
    }
    .input-field:focus {
      border-color: #3d68c9;
      box-shadow: 0 0 0 5px rgba(61, 104, 201, 0.15);
      outline: none;
    }
    textarea.input-field {
      min-height: 130px;
      resize: vertical;
    }
    .btn-submit {
      background: linear-gradient(115deg, #1f2f5e, #2f4a9e);
      border: none;
      border-radius: 40px;
      padding: 0.9rem 2.2rem;
      font-weight: 600;
      font-size: 1.2rem;
      letter-spacing: 0.3px;
      color: white;
      box-shadow: 0 10px 20px -7px #1f3a7a;
      transition: all 0.2s;
      width: 100%;
      border: 1px solid rgba(255,255,255,0.3);
    }
    .btn-submit:hover {
      background: linear-gradient(115deg, #273e75, #3b5bb5);
      transform: scale(1.02);
      box-shadow: 0 18px 25px -8px #1f3f8f;
    }
    .btn-submit i {
      margin-right: 10px;
      font-size: 1.4rem;
      vertical-align: middle;
    }

    /* form validation feedback (beautiful) */
    .error-feedback {
      color: #c3415b;
      font-size: 0.9rem;
      margin-top: 5px;
      padding-left: 1rem;
      font-weight: 500;
      display: flex;
      align-items: center;
      gap: 5px;
    }
    .error-feedback i {
      font-size: 1.1rem;
    }
    .input-field.error {
      border-color: #c3415b;
      background-color: #fff7f9;
    }
    .input-field.valid {
      border-color: #2b9c5c;
      background-color: #f6fef9;
    }
    .success-message {
      background: #e1f7ea;
      border-radius: 40px;
      color: #136b41;
      font-weight: 500;
      padding: 1rem 1.8rem;
      margin-top: 1rem;
      display: none;
      align-items: center;8520/
      gap: 12px;
      border-left: 6px solid #2b9c5c;
    }
    .success-message i {
      font-size: 2rem;
    }

    /* subtle animation for cards */
    @media (max-width: 767px) {
      .contact-section {
        margin: 1rem 0.8rem;
        padding: 2rem 1rem;
      }
      .form-card {
        padding: 2rem 1.2rem;
      }
    }

    /* consistent with existing header/footer style (reuse) */
    .navbar, .footer {
      /* as provided in previous answer — keeping style coherent */
    }