:root {
      --primary-color: #007BFF;
      --secondary-color: #00C6FF;
      --dark-bg: #0A192F;
      --light-bg: #F8F9FA;
      --text-light: #CCD6F6;
      --text-dark: #333;
      --text-muted: #6c757d;
      --warning-color-dark-bg: #FFC107;
    }

    /* --- Base & Typography --- */
    html, body {
      scroll-behavior: smooth;
      overflow-x: hidden; 
    }
    body {
      font-family: 'Hind Siliguri', 'Poppins', sans-serif;
      background-color: var(--light-bg);
      color: var(--text-dark);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
      position: relative;
    }
    h1, h2, h3, h4, h5, h6 {
      font-weight: 700;
      color: var(--dark-bg);
    }

    /* --- Navbar --- */
    .navbar {
      background: rgba(255, 255, 255, 0.9);
      transition: background-color 0.4s ease, box-shadow 0.4s ease, padding 0.4s ease;
      padding-top: 1rem;
      padding-bottom: 1rem;
    }
    .navbar.navbar-scrolled {
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(15px);
      -webkit-backdrop-filter: blur(15px);
      box-shadow: 0 2px 15px rgba(0,0,0,0.08);
      padding-top: 0.5rem;
      padding-bottom: 0.5rem;
    }
    .navbar-brand {
      font-weight: 700;
      color: var(--dark-bg) !important;
    }
    .nav-link {
        color: var(--text-muted);
        font-weight: 500;
        transition: all 0.2s ease-in-out;
        position: relative;
        padding-left: 0;
        padding-right: 0;
        margin: 0 1rem;
    }
    .nav-link::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 2px;
        background-color: var(--primary-color);
        transition: width 0.3s ease;
    }
    .nav-link:hover, .nav-link.active {
        color: var(--text-dark) !important;
    }
    .nav-link:hover::after, .nav-link.active::after {
        width: 100%;
    }
    .btn-gradient {
        background-image: linear-gradient(45deg, var(--primary-color) 0%, var(--secondary-color) 100%);
        border: none; color: white; font-weight: 600;
        transition: all 0.3s ease;
        box-shadow: 0 4px 15px rgba(0, 123, 255, 0.2);
    }
    .btn-gradient:hover {
        background-image: linear-gradient(45deg, var(--secondary-color) 0%, var(--primary-color) 100%);
        color: white; transform: translateY(-3px);
        box-shadow: 0 8px 25px rgba(0, 123, 255, 0.35);
    }

    /* --- Hero Section --- */
    .hero-section {
        background-color: var(--dark-bg);
        color: var(--text-light);
        padding-bottom: 120px;
        min-height: 100vh;
        display: flex;
        align-items: center;
        position: relative;
        overflow: hidden;
        transition: padding-top 0.4s ease;
    }
    .hero-bg-shape {
        position: absolute;
        width: 50vw;
        height: 50vw;
        max-width: 700px;
        max-height: 700px;
        border-radius: 50%;
        filter: blur(150px);
        opacity: 0.2;
        animation: float 20s ease-in-out infinite alternate;
    }
    .shape-1 { background: var(--primary-color); top: -25%; left: -25%; animation-delay: 2s; }
    .shape-2 { background: var(--secondary-color); bottom: -25%; right: -25%; }
    
    @keyframes float {
        from { transform: translateY(20px) translateX(-10px) rotate(0deg); }
        to { transform: translateY(-20px) translateX(10px) rotate(180deg); }
    }
    
    .hero-content { position: relative; z-index: 2; }
    .hero-section h1 {
        font-weight: 800;
        font-size: clamp(2.5rem, 5vw, 4.2rem);
        color: #fff;
        line-height: 1.2;
    }
    .text-gradient {
        background: linear-gradient(45deg, #fff 20%, var(--secondary-color) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        text-fill-color: transparent;
    }
    .hero-section .lead {
        font-size: clamp(1rem, 2vw, 1.2rem); max-width: 550px; opacity: 0.8;
    }
    .hero-cta-btn {
        animation: pulseGlow 2s infinite ease-out;
    }
    @keyframes pulseGlow {
        0%, 100% { box-shadow: 0 8px 25px rgba(0, 123, 255, 0.35); }
        50% { box-shadow: 0 12px 40px rgba(0, 198, 255, 0.5); }
    }

    .supported-brands img {
        height: 30px;
        opacity: 0.7;
        transition: all 0.3s ease;
        margin: 10px 15px;
    }
    .supported-brands img:hover { opacity: 1; transform: scale(1.1); }
    .hero-phone-mockup img {
        max-width: 320px;
        filter: drop-shadow(0 25px 40px rgba(0,0,0,0.5));
    }
    
    /* --- Section Styling --- */
    .section-padding { padding: 100px 0; }
    .section-title { font-weight: 700; font-size: clamp(2.2rem, 5vw, 2.8rem); margin-bottom: 1rem; }
    .section-subtitle { color: var(--text-muted); max-width: 600px; margin: 0 auto 60px auto; font-size: 1.1rem; }
    
    /* --- Shared Background Pattern --- */
    .bg-pattern {
        background-color: #ffffff;
        background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 20 20'%3E%3Cg fill-rule='evenodd'%3E%3Cg id='dot-grid' fill='%23e0e6f1' fill-opacity='0.4'%3E%3Cpath d='M10 20a10 10 0 1 1 0-20 10 10 0 0 1 0 20zm0-2a8 8 0 1 0 0-16 8 8 0 0 0 0 16z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    }

    /* --- Service Cards --- */
    .service-card {
        background: #fff;
        border: 1px solid #e9ecef;
        border-radius: 20px;
        padding: 40px 30px;
        transition: all 0.3s ease-in-out;
        box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.05);
        height: 100%;
        border-bottom: 4px solid transparent;
    }
    .service-card:hover {
        transform: translateY(-10px);
        box-shadow: 0 12px 40px 0 rgba(0, 123, 255, 0.12);
        border-bottom-color: var(--primary-color);
    }
    .service-icon {
        width: 70px; height: 70px; border-radius: 50%; display: grid; place-items: center;
        margin-bottom: 25px; font-size: 2.5rem; color: white;
        background-image: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        box-shadow: 0 5px 15px rgba(0, 123, 255, 0.3);
        padding: 8px;
    }

    /* --- "How it Works" Section --- */
    .how-it-works-section { background-color: var(--light-bg); }
    .timeline-container { position: relative; max-width: 800px; margin: auto; }
    .timeline-container::after {
        content: ''; position: absolute; width: 4px; top: 0; bottom: 0; left: 50%; margin-left: -2px;
        background-image: linear-gradient(to bottom, var(--secondary-color), var(--primary-color));
        border-radius: 2px;
    }
    .timeline-item { padding: 10px 40px; position: relative; width: 50%; }
    .timeline-content {
        padding: 25px 30px; background-color: #fff; position: relative;
        border-radius: 12px; box-shadow: 0 4px 15px rgba(0,0,0,0.06);
        border-left: 4px solid var(--primary-color);
    }
    .timeline-item.right .timeline-content { border-left: none; border-right: 4px solid var(--secondary-color); }
    .timeline-item.left { left: 0; }
    .timeline-item.right { left: 50%; }
    .timeline-item .icon {
        position: absolute; width: 50px; height: 50px; right: -25px;
        color: white; top: 32px; border-radius: 50%;
        z-index: 1; display: grid; place-items: center; font-size: 1.5rem;
        border: 4px solid var(--light-bg);
        box-shadow: 0 0 0 4px var(--primary-color);
    }
    .timeline-item.left .icon { left: -25px; background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); padding: 5px; }
    .timeline-item.right .icon { right: -25px; background: linear-gradient(135deg, var(--secondary-color), var(--primary-color)); box-shadow: 0 0 0 4px var(--secondary-color); padding: 5px; }
    @media screen and (max-width: 768px) {
        .timeline-container::after { display: none; }
        .timeline-item { width: 100%; padding-left: 65px; padding-right: 15px; }
        .timeline-item.right { left: 0%; }
        .timeline-item.left .icon, .timeline-item.right .icon { left: 0; }
    }
    
    /* --- Testimonials Section --- */
    .testimonial-card {
        background: #fff; border-radius: 15px; padding: 30px;
        box-shadow: 0 10px 30px rgba(0,0,0,0.07);
        border-top: 4px solid var(--primary-color);
        height: 100%;
    }
    .testimonial-author img { width: 60px; height: 60px; border-radius: 50%; object-fit: cover; }
    .testimonial-rating {
        display: flex;
        gap: 4px;
    }

    .testimonial-rating .anis-star {
        color: #FFC107;
        width: 1.5rem;
        height: 1.5rem;
    }

    /* --- FAQ Section --- */
    .faq-section { background-color: var(--light-bg); }
    .accordion-item {
        background-color: #fff;
        border: 1px solid #dee2e6;
        margin-bottom: 15px;
        border-radius: 10px !important;
        overflow: hidden;
        box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    }
    .accordion-button {
        font-weight: 600;
        color: var(--dark-bg);
    }
    .accordion-button:not(.collapsed) {
        color: #fff;
        background-image: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
        box-shadow: none;
    }
    .accordion-button:not(.collapsed)::after {
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
    }
    .accordion-button:focus {
        box-shadow: 0 0 0 .25rem rgba(0, 123, 255, 0.25);
        border-color: var(--primary-color);
    }

    /* --- Footer --- */
    .footer {
      background-color: var(--dark-bg);
      color: var(--text-light);
      padding: 80px 0 30px;
    }
    .footer-brand {
        display: block; font-size: 1.8rem; font-weight: 700; margin-bottom: 15px; color: #fff; text-decoration: none;
    }
    .footer-links a {
        color: var(--text-light); opacity: 0.8; text-decoration: none;
        margin: 0 15px; font-weight: 500; transition: all 0.3s ease;
    }
    .footer-links a:hover { opacity: 1; color: var(--secondary-color); }
    .social-icons a {
        color: var(--text-light); text-decoration: none; font-size: 1.2rem;
        width: 40px; height: 40px; line-height: 40px; display: inline-block;
        text-align: center; border-radius: 50%; margin: 0 5px;
        background: rgba(255,255,255,0.1); transition: all 0.3s ease;
    }
    .social-icons a:hover {
        background: var(--primary-color); color: #fff; transform: translateY(-3px);
    }
    .footer hr { border-color: rgba(255, 255, 255, 0.1); }

    /* --- Marquee Notice --- */
    .marquee-notice-wrapper {
    padding-top: 88px;
    transition: padding-top 0.4s ease;
    }
    .marquee-notice {
      background-image: linear-gradient(45deg, var(--primary-color) 0%, var(--secondary-color) 100%);
      color: white;
      padding: 8px 0;
      font-weight: 500;
      position: fixed;
      width: 100%;
      left: 0;
      z-index: 1030;
      transition: top 0.4s ease;
    }
    .navbar.navbar-scrolled + .marquee-notice-wrapper {
    padding-top: 72px;
    }
    .navbar.navbar-scrolled ~ .marquee-notice-wrapper .marquee-notice {
    top: 72px;
    }

    /* --- Updated Hero Buttons --- */
    .btn-outline-light-custom {
        color: #fff;
        border: 2px solid rgba(255, 255, 255, 0.5);
        transition: all 0.3s ease;
        font-weight: 500;
        backdrop-filter: blur(5px);
        -webkit-backdrop-filter: blur(5px);
        background: rgba(255, 255, 255, 0.1);
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
    .btn-outline-light-custom:hover {
        color: var(--dark-bg);
        background-color: #fff;
        border-color: #fff;
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(255, 255, 255, 0.2);
    }
    .hero-btn-icon {
        width: 1.2rem;
        height: 1.2rem;
        margin-right: 0.5rem;
    }

    /* --- Custom Notice Modal Styling --- */
    .notice-modal-custom {
        border-radius: 15px;
    }
    .notice-modal-custom .modal-header {
        border-top-left-radius: 14px;
        border-top-right-radius: 14px;
    }
    .notice-modal-custom .modal-footer {
        border-bottom-left-radius: 14px;
        border-bottom-right-radius: 14px;
    }

    /* Heroicon স্টাইল করার জন্য নতুন ক্লাস */
    .notice-point-hero-icon {
        color: #198754;
        width: 1.3rem;
        height: 1.3rem;
        margin-right: 0.75rem;
        margin-top: 0.15rem;
        flex-shrink: 0;
    }

    .notice-point span strong {
        font-weight: 700;
        color: var(--dark-bg);
    }

    .notice-header-icon {
        width: 1.5rem;
        height: 1.5rem;
        color: var(--dark-bg);
        margin-right: 4px;
    }