/* ========================
             MAIN STYLESHEET (style.css)
             UI BASED ON: boost.php
        ========================= */

        /* --- 1. Global Styles & Variables --- */
        html {
            scroll-behavior: smooth;
        }
        * {
            box-sizing: border-box;
        }

        :root {
            color-scheme: light dark;
            --brand: #007991; /* Main Brand Color */
            --brand-2: #00a896; /* Secondary Brand Color */
            accent-color: var(--brand);
        }

        body {
            margin: 0;
            background: #f7fafc;
            color: #0f172a;
            font: 16px/1.75 'Hind Siliguri', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        a {
            color: var(--brand-2);
            text-decoration: none;
            text-underline-offset: 3px;
        }
        a:hover {
            color: #005f73; /* Darker brand color */
            text-decoration: underline;
        }
        
        /* ✅ আপডেটেড: টাইপোগ্রাফি রিফাইনমেন্ট */
        h1, h2, h3 {
            font-family: 'Hind Siliguri', system-ui, -apple-system, sans-serif;
            text-wrap: balance;
            color: #1a202c;
            letter-spacing: 0.2px; /* সামান্য লেটার-স্পেসিং */
        }
        .brand-highlight {
            color: var(--brand);
        }

        /* Skip link (A11y) */
        .skip-link {
            position: absolute;
            left: -9999px;
            top: auto;
            width: 1px;
            height: 1px;
            overflow: hidden;
        }
        .skip-link:focus {
            left: 12px;
            top: 12px;
            width: auto;
            height: auto;
            padding: .5rem .75rem;
            border-radius: 8px;
            background: var(--brand-2);
            color: #fff;
            z-index: 1000;
        }

        /* --- 2. Layout & Section --- */
        .container {
            max-width: 1100px;
            margin-inline: auto;
            padding: 0 16px;
        }
        section {
            padding: clamp(60px, 8vw, 100px) 0;
        }
        
        /* ✅ আপডেটেড: সেকশন হেডিং রিফাইনমেন্ট */
        .section-title {
            font-weight: 800;
            font-size: clamp(2rem, 3.2vw, 2.8rem); /* ফন্ট সাইজ সামান্য বড় */
            text-align: center;
            letter-spacing: .3px; /* হেডিং-এ স্পেসিং */
            margin: 0 0 20px;
        }
        .section-subtitle {
            color: #475569;
            font-size: 1.15rem; /* সাবটাইটেল সামান্য বড় */
            text-align: center;
            margin: -0.5rem auto 3.5rem; /* নিচের মার্জিন বাড়ানো হলো */
            max-width: 65ch;
            line-height: 1.85; /* লাইন হাইট বাড়ানো হলো */
        }

        /* --- 3. Header & Navigation --- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.85);
            border-bottom: 1px solid #e2e8f0;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            transition: background-color 0.3s ease;
        }

        @supports (backdrop-filter: blur(12px)) {
            .site-header {
                backdrop-filter: saturate(180%) blur(12px);
            }
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
            padding: 0 16px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
        }
        .brand img {
            height: 32px;
            width: auto;
        }
        .brand-name {
            font-size: 1.5rem; /* Made larger */
            font-weight: 800;
            color: #1a202c;
        }
        .brand-name:hover {
            text-decoration: none;
        }

        .nav-links-desktop {
            display: flex;
            align-items: center;
            gap: 1.5rem;
        }
        .nav-links-desktop a {
            font-size: 1rem;
            font-weight: 600;
            color: #4a5568;
            text-decoration: none;
            padding: 8px 0;
            position: relative;
            transition: color 0.2s ease;
        }
        .nav-links-desktop a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--brand, #007991);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
        }
        .nav-links-desktop a:hover,
        .nav-links-desktop a:focus-visible {
            color: #1a202c;
            text-decoration: none;
        }
        .nav-links-desktop a:hover::after,
        .nav-links-desktop a:focus-visible::after {
            transform: scaleX(1);
        }

        .nav-links-desktop .nav-cta {
            font-weight: 700;
            padding: 10px 20px;
            border-radius: 8px;
            color: #fff;
            background: linear-gradient(90deg, var(--brand, #007991), var(--brand-2, #00a896));
            box-shadow: 0 4px 12px rgba(0, 121, 145, 0.2);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }
        .nav-links-desktop .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 7px 15px rgba(0, 121, 145, 0.3);
            color: #fff;
            text-decoration: none;
        }
        .nav-links-desktop .nav-cta::after {
            display: none;
        }

        /* Mobile Nav Toggle */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 10px;
            z-index: 1010;
        }
        .hamburger {
            display: block;
            width: 24px;
            height: 2px;
            background-color: #1a202c;
            position: relative;
            transition: transform 0.3s ease, background-color 0.3s ease;
        }
        .hamburger::before,
        .hamburger::after {
            content: '';
            position: absolute;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: #1a202c;
            transition: transform 0.3s ease, top 0.3s ease, bottom 0.3s ease;
        }
        .hamburger::before { top: -8px; }
        .hamburger::after { bottom: -8px; }

        .nav-toggle[aria-expanded="true"] .hamburger { background-color: transparent; }
        .nav-toggle[aria-expanded="true"] .hamburger::before { top: 0; transform: rotate(45deg); }
        .nav-toggle[aria-expanded="true"] .hamburger::after { bottom: 0; transform: rotate(-45deg); }

        /* Mobile Offscreen Menu */
        .offscreen-menu {
            position: fixed;
            top: 72px; /* Header height */
            left: 0;
            width: 100%;
            height: calc(100vh - 72px);
            background-color: #ffffff;
            transform: translateX(-100%);
            transition: transform 0.3s ease-in-out;
            padding: 2rem;
            display: flex;
            flex-direction: column;
        }
        .offscreen-menu.active {
            transform: translateX(0);
        }
        .nav-links-mobile {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.5rem;
        }
        .nav-links-mobile a {
            font-size: 1.2rem;
            font-weight: 700;
            color: #2d3748;
            text-decoration: none;
        }
        .nav-links-mobile .nav-cta {
            width: 100%;
            text-align: center;
            padding: 12px 24px;
        }

        @media (max-width: 768px) {
            .nav-links-desktop { display: none; }
            .nav-toggle { display: block; }
        }

        /* --- 4. Hero Section --- */
        .hero {
            position: relative;
            padding: clamp(60px, 10vw, 120px) 16px;
            background-color: #f8fafc;
            background-image:
                radial-gradient(circle at top left, rgba(0, 168, 150, 0.1), transparent 40%),
                radial-gradient(circle at bottom right, rgba(0, 121, 145, 0.1), transparent 50%);
            overflow: hidden;
            text-align: center;
        }
        .hero-container {
            max-width: 900px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }
        .hero-content {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.5rem;
        }
        
        /* ✅ আপডেটেড: হিরো টাইটেল রিফাইনমেন্ট */
        .hero-title {
            font-size: clamp(2.5rem, 5vw, 3.8rem); /* হিরো টাইটেল আরও বড় এবং প্রভাবশালী */
            font-weight: 900;
            line-height: 1.3; /* লাইন হাইট সমন্বয় */
            color: #1a202c;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
            max-width: 25ch;
            margin: 0;
            letter-spacing: 0.5px; /* টাইটেলকে আরও প্রশস্ত দেখানো */
        }
        .hero-subtitle {
            font-size: clamp(1rem, 2.5vw, 1.15rem);
            color: #4a5568;
            max-width: 65ch;
            margin: -1rem auto 0;
        }
        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
            margin-top: 1rem;
        }
        .usp-list {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.75rem;
            list-style: none;
            padding: 0;
            margin: 1.5rem 0 0;
        }
        .usp-list li {
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(5px);
            border: 1px solid #e2e8f0;
            border-radius: 999px;
            padding: 8px 16px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #2d3748;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        @media (max-width: 768px) {
            .hero-title { font-size: clamp(2rem, 7vw, 2.5rem); } /* মোবাইলের জন্য সমন্বয় */
            .hero-cta {
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                max-width: 320px;
            }
            .usp-list { gap: 0.5rem; }
            .usp-list li {
                font-size: 0.85rem;
                padding: 6px 12px;
            }
        }

        /* --- 5. Buttons (Global) --- */
        /* ✅ আপডেটেড: বাটন রিফাইনমেন্ট */
        .btn {
            font-family: 'Hind Siliguri';
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.65rem;
            font-weight: 700;
            font-size: 1rem;
            padding: 12px 24px;
            border-radius: 10px; /* 12px থেকে কমিয়ে সামান্য শার্প করা হলো */
            border: 2px solid transparent;
            cursor: pointer;
            text-decoration: none;
            /* শ্যাডো রিফাইন করা হলো */
            box-shadow: 0 3px 8px rgba(0, 121, 145, 0.1), 0 1px 3px rgba(0, 0, 0, 0.05);
            transition: all 0.25s ease-in-out;
        }
        .btn:hover {
            transform: translateY(-3px) scale(1.02); /* সামান্য স্কেল-আপ ইফেক্ট */
            box-shadow: 0 6px 15px rgba(0, 121, 145, 0.18), 0 3px 8px rgba(0, 0, 0, 0.07);
            text-decoration: none;
        }
        .btn:active {
            transform: translateY(-1px);
        }
        .btn-primary {
            background: linear-gradient(90deg, #007991, #00a896);
            color: #ffffff;
        }
        .btn-primary:hover { color: #ffffff; }
        .btn-outline {
            background-color: #ffffff;
            color: #007991;
            border-color: #e2e8f0;
        }
        .btn-outline:hover {
            border-color: #007991;
            color: #007991;
        }
        .btn-full {
            width: 100%;
        }

        /* --- 6. Features Section (Icon Top) --- */
        .features-section {
            padding: clamp(3rem, 6vw, 5rem) 1rem;
            border-top: 1px solid #e2e8f0;
        }
        .features-grid-icons {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            text-align: left;
        }
        
        /* ✅ আপডেটেড: কার্ড হোভার ইফেক্ট */
        .feature-card {
            position: relative;
            background-color: #ffffff; /* Default bg */
            border: 1px solid #e2e8f0;
            border-radius: 1rem; /* 16px */
            padding: 2rem;
            box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
            /* ট্রানজিশন স্মুথ করা হলো */
            transition: transform 0.3s ease-out, box-shadow 0.3s ease-out, border-color 0.3s ease-out;
        }
        .features-section[style*="background-color: #f8fafc;"] .feature-card {
            background-color: #ffffff; /* Card on light bg */
        }
        .features-section[style*="background-color: #ffffff;"] .feature-card {
            background-color: #f8fafc; /* Card on white bg */
        }

        .feature-card:hover {
            transform: translateY(-8px); /* হোভারে একটু বেশি উপরে উঠবে */
            border-color: var(--brand-2); /* ব্র্যান্ড কালার দিয়ে বর্ডার হাইলাইট */
            /* শ্যাডো আরও স্পষ্ট করা হলো */
            box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08), 0 0 0 1px var(--brand-2);
        }
        .feature-icon {
            position: absolute;
            top: -1.75rem;
            left: 50%;
            transform: translateX(-50%);
            display: grid;
            place-items: center;
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background-color: #ecfeff;
            border: 4px solid #ffffff; /* Needs to match section bg */
            color: var(--brand);
            box-shadow: 0 8px 16px rgba(14, 165, 164, 0.1);
        }
        .features-section[style*="background-color: #f8fafc;"] .feature-icon {
            border-color: #f8fafc;
        }
        .feature-icon svg {
            width: 32px;
            height: 32px;
        }
        .feature-title {
            text-align: center;
            font-size: 1.25rem;
            font-weight: 700;
            color: #1e293b;
            margin-bottom: 0.75rem;
            margin-top: 1rem; /* Space from icon */
        }
        .feature-text {
            text-align: center;
            font-family: 'Noto Sans Bengali', sans-serif;
            color: #475569;
            line-height: 1.8;
            margin: 0;
        }

        /* --- 7. How It Works (Step Cards) --- */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            text-align: left;
        }
        .features-grid .feature-card {
            padding: 2.5rem 1.75rem 1.75rem; /* Different padding for step cards */
        }
        .step-number {
            position: absolute;
            top: -1.25rem;
            left: 1.5rem;
            font-size: 3rem;
            font-weight: 800;
            color: #d2f6ee;
            z-index: 1;
            user-select: none;
        }
        .features-grid .feature-title {
            position: relative;
            z-index: 2;
            text-align: left;
            margin-top: 0;
        }
        .features-grid .feature-text {
            position: relative;
            z-index: 2;
            text-align: left;
        }

        /* --- 8. Pricing Section --- */
        .pricing-section {
            padding: clamp(3rem, 6vw, 5rem) 1rem;
            background-color: #f8fafc;
            border-top: 1px solid #e2e8f0;
        }
        .pricing-section .section-title { margin-bottom: 1rem; }
        .pricing-section .section-subtitle { margin: -0.5rem auto 3rem; }

        .pricing-toggle {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.75rem;
            background-color: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 5px;
            padding: 0.5rem;
            max-width: 700px;
            margin: 0 auto 3.5rem;
            box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
        }
        .toggle-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            flex-grow: 1;
            padding: 0.4rem 0.6rem;
            border: none;
            border-radius: 5px;
            background-color: transparent;
            color: #475569;
            font-family: 'Hind Siliguri', sans-serif;
            font-size: 1rem;
            font-weight: 700;
            cursor: pointer;
            white-space: nowrap;
            transition: background-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
        }
        .toggle-btn:hover {
            background-color: #f1f5f9;
            color: #1e293b;
        }
        .toggle-btn[aria-selected="true"],
        .toggle-btn.active { /* Added .active for JS fallback */
            background: linear-gradient(110deg, #007991, #00a896);
            color: #ffffff;
            box-shadow: 0 6px 18px rgba(0, 168, 150, 0.25);
        }
        .discount-badge {
            display: inline-block;
            background-color: #dc2626;
            color: #ffffff;
            padding: 0.2rem 0.6rem;
            border-radius: 99px;
            font-size: 0.75rem;
            font-weight: 700;
            line-height: 1;
        }
        .toggle-btn[aria-selected="true"] .discount-badge {
            background-color: rgba(255, 255, 255, 0.2);
            color: #ffffff;
        }

        .pricing-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            align-items: center;
        }
        @media (min-width: 900px) {
            .pricing-grid {
                grid-template-columns: 1fr 1.1fr 1fr;
            }
        }
        .pricing-card {
            display: flex;
            flex-direction: column;
            background-color: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 1.0rem;
            padding: 1.5rem;
            box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            height: 100%;
        }
        .pricing-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
        }
        .card-header {
            text-align: center;
            border-bottom: 1px solid #f1f5f9;
            padding-bottom: 0.5rem;
            margin-bottom: 0.5rem;
        }
        .card-header h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #1e293b;
        }
        .card-header p {
            color: #64748b;
            font-size: 1rem;
            margin-top: 0.2rem;
        }
        .price {
            text-align: center;
            margin-bottom: 1.0rem;
        }
        .price .amount {
            font-size: 3.2rem;
            font-weight: 800;
            color: #007991;
            line-height: 1;
        }
        .price .period {
            color: #64748b;
            font-size: 1rem;
        }
        .perks {
            list-style: none;
            margin: 0 0 2rem;
            padding: 0;
            flex-grow: 1;
        }
        .perks li {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            margin-bottom: 0.75rem;
            color: #475569;
        }
        .perks li svg {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            color: #7fdbbc;
            margin-top: 2px;
        }
        .pricing-card .btn {
            width: 100%;
            padding: 0.75rem 0.5rem; /* Taller button */
            font-size: 1rem;
            font-weight: 700;
            margin-top: auto;
        }
        .pricing-card.popular {
            border: 2px solid #007991;
            background: linear-gradient(180deg, #f0f9ff, #ffffff);
            transform: scale(1.05);
            position: relative;
        }
        .pricing-card.popular:hover {
            transform: scale(1.08) translateY(-8px);
        }
        .package-badge {
            position: absolute;
            top: -15px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(90deg, #007991, #00a896);
            color: #ffffff;
            padding: 0.4rem 1rem;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.9rem;
        }
        .common-perks {
            margin-top: 3rem;
            padding: 2rem;
            background-color: #ffffff;
            border-radius: 1.25rem;
            border: 1px solid #e2e8f0;
            text-align: center;
            box-shadow: 0 8px 24px rgba(2,8,23,.06);
        }
        .common-perks h4 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
        }
        .common-perks ul {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 1rem;
            list-style: none;
            padding: 0;
            text-align: left;
        }
        .common-perks li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-weight: 600;
            padding: 10px 12px;
            background: #f9fafb;
            border: 1px solid #e2e8f0;
            border-radius: 12px;
        }
        .common-perks li svg {
            flex-shrink: 0;
            color: var(--brand-2);
            margin-top: 2px;
        }

        /* --- 9. Reviews Section --- */
        .reviews-section {
            padding: clamp(3rem, 6vw, 5rem) 1rem;
            background-color: #ffffff; /* Switched from #f8fafc */
            border-top: 1px solid #e2e8f0;
        }
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .review-card {
            position: relative;
            display: flex;
            flex-direction: column;
            background-color: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 16px;
            padding: 2.5rem 2rem 2rem;
            box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }
        .review-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
        }
        .quote-icon {
            position: absolute;
            top: -1rem;
            left: 1.5rem;
            font-family: serif;
            font-size: 5rem;
            font-weight: 800;
            line-height: 1;
            color: #ecfeff; /* Light brand color */
            z-index: 1;
            user-select: none;
        }
        .review-card blockquote {
            position: relative;
            z-index: 2;
            font-size: 1.1rem;
            font-style: italic;
            line-height: 1.7;
            color: #334155;
            margin: 0 0 auto;
            padding-bottom: 1.5rem;
            border: none;
        }
        .author {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-top: auto;
            padding-top: 1rem;
            border-top: 1px solid #f1f5f9;
        }
        .author img {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid #ffffff;
            box-shadow: 0 0 8px rgba(0,0,0,0.1);
        }
        .author-info {
            font-style: normal;
            line-height: 1.4;
        }
        .author .name {
            display: block;
            font-family: 'Hind Siliguri', sans-serif;
            font-weight: 700;
            color: #1e293b;
        }
        .author .role {
            display: block;
            font-size: 0.875rem;
            color: #64748b;
        }

        /* --- 10. FAQ Section --- */
        .faq-section {
            padding: clamp(48px, 8vw, 96px) 16px;
            background-color: #f7fafc;
        }
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-eyebrow {
            display: inline-block;
            padding: 6px 12px;
            background-color: #e6fffa;
            color: #007991;
            font-size: 0.875rem;
            font-weight: 700;
            border-radius: 999px;
            margin-bottom: 16px;
        }
        .faq-heading {
            font-family: 'Hind Siliguri', system-ui, sans-serif;
            font-size: clamp(1.75rem, 4vw, 2.5rem);
            font-weight: 800;
            color: #1a202c;
            margin: 0 0 12px;
        }
        .faq-subtitle {
            font-size: 1.1rem;
            color: #4a5568;
            max-width: 60ch;
            margin: 0 auto;
            line-height: 1.6;
        }
        .faq-list {
            display: grid;
            gap: 1rem;
        }
        .faq-item {
            background-color: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 16px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }
        .faq-item[open] {
            border-color: #00a896;
            box-shadow: 0 10px 25px rgba(0, 168, 150, 0.1);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            padding: 20px 24px;
            cursor: pointer;
            list-style: none;
            font-size: 1.1rem;
            font-weight: 700;
            color: #2d3748;
            width: 100%;
        }
        .faq-question::-webkit-details-marker {
            display: none;
        }
        .faq-icon {
            flex-shrink: 0;
            color: #007991;
            transition: transform 0.3s ease;
        }
        .faq-item[open] .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            overflow: hidden;
            display: grid;
            grid-template-rows: 0fr;
            transition: grid-template-rows 0.4s ease-in-out, padding 0.3s ease;
        }
        .faq-item[open] .faq-answer {
            grid-template-rows: 1fr;
        }
        .faq-answer p {
            padding: 0 24px 24px;
            margin: 0;
            font-size: 1rem;
            line-height: 1.7;
            color: #4a5568;
            border-top: 1px solid #e2e8f0;
            padding-top: 20px;
        }
        @media (max-width: 640px) {
            .faq-question {
                padding: 16px;
                font-size: 1rem;
            }
            .faq-answer p {
                padding: 0 16px 16px;
                padding-top: 16px;
            }
        }

        /* --- 11. Lead Form Section (Contact) --- */
        .lead-form-section {
            padding: clamp(3rem, 6vw, 5rem) 1rem;
            background-color: #ffffff; /* Switched from #f8fafc */
            border-top: 1px solid #e2e8f0;
        }
        .form-container {
            max-width: 680px;
            margin: 0 auto;
            text-align: center;
        }
        .lead-form-card {
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 1.25rem; /* 20px */
            padding: clamp(1.5rem, 5vw, 2.5rem);
            box-shadow: 0 10px 28px rgba(15, 23, 42, 0.07);
            text-align: left;
        }
        .form-row {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.25rem;
        }
        @media (min-width: 768px) {
            .form-row {
                grid-template-columns: 1fr 1fr;
            }
        }
        .form-group {
            margin-bottom: 1.25rem;
        }
        .form-group:last-child {
            margin-bottom: 0;
        }
        label {
            display: block;
            font-family: 'Hind Siliguri', sans-serif;
            font-weight: 700;
            font-size: 1rem;
            color: #334155;
            margin-bottom: 0.5rem;
        }
        input[type="text"],
        input[type="tel"],
        input[type="url"],
        input[type="email"] {
            width: 100%;
            height: 52px;
            padding: 0 1rem;
            border: 1px solid #cbd5e1;
            border-radius: 0.75rem; /* 12px */
            background-color: #fdfdff;
            font-family: 'Noto Sans Bengali', sans-serif;
            font-size: 1rem;
            color: #1e293b;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        input::placeholder { color: #94a3b8; }
        input:focus {
            outline: none;
            border-color: #007991;
            box-shadow: 0 0 0 3px rgba(0, 121, 145, 0.15);
        }
        .form-consent {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            margin: 1rem 0 1.5rem;
        }
        .form-consent input[type="checkbox"] {
            width: 1.15rem;
            height: 1.15rem;
            margin-top: 0.2rem;
            accent-color: var(--brand);
        }
        .form-consent label {
            font-weight: 500;
            font-size: 0.95rem;
            margin: 0;
        }
        .btn-full {
            width: 100%;
            height: 56px;
            font-size: 1.1rem;
            justify-content: center;
        }
        .btn-full:active {
            transform: scale(0.98);
        }
        /* Form Validation & Messages */
        .error-message {
            color: #dc2626;
            font-size: 0.875rem;
            margin-top: 0.5rem;
            display: none;
        }
        .consent-error { width: 100%; }
        input.invalid {
            border-color: #dc2626;
            background-color: #fef2f2;
        }
        .form-error-summary {
            display: none;
            background-color: #fef2f2;
            color: #dc2626;
            border: 1px solid #fecaca;
            padding: 1rem;
            border-radius: 0.75rem;
            margin-bottom: 1.5rem;
        }
        .form-success-message {
            display: none;
            text-align: center;
            background-color: #f0fdf4;
            color: #16a34a;
            border: 1px solid #bbf7d0;
            padding: 1rem;
            border-radius: 0.75rem;
            margin-top: 1.5rem;
        }

        /* Footer Styles */
.site-footer {
    background-color: #0f172a;
    color: #f8fafc;
    padding: 60px 0 20px;
    font-family: 'Hind Siliguri', sans-serif;
    border-top: 4px solid #007991;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: #ffffff;
}

.verification-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    padding: 5px 10px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.dbid-text {
    font-size: 0.95rem;
    color: #cbd5e1;
    margin-bottom: 5px;
}

.address-text {
    font-size: 0.9rem;
    color: #94a3b8;
    line-height: 1.6;
}

.footer-col h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: #ffffff;
    border-bottom: 2px solid #007991;
    display: inline-block;
    padding-bottom: 5px;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #007991;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    color: #ffffff;
    background: #334155;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #007991;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #1e293b;
    font-size: 0.9rem;
    color: #64748b;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links a, .verification-badge {
        justify-content: center;
    }

    .social-links {
        justify-content: center;
    }
}
        /* --- 13. Toast Notification --- */
        .toast {
            position: fixed;
            bottom: 25px;
            left: 50%;
            transform: translateX(-50%) translateY(30px);
            display: flex;
            align-items: center;
            gap: 12px;
            background-color: #2d3748; /* Dark */
            color: #ffffff;
            padding: 14px 24px;
            border-radius: 999px; /* Pill shape */
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
            z-index: 2000;
            font-family: 'Hind Siliguri', sans-serif;
            font-weight: 600;
            font-size: 1rem;
        }
        .toast.show {
            opacity: 1;
            visibility: visible;
            transform: translateX(-50%) translateY(0);
        }
        .toast.success {
            background: #16a34a; /* Green */
        }
        .toast.error {
            background: #dc2626; /* Red */
        }

        /* --- 14. Dark Mode (from boost.php) --- */
        @media (prefers-color-scheme: dark) {
            :root {
                --surface-bg: #0b1320;
                --surface-card: #111827;
                --surface-hover: #1f2937;
                --border-subtle: #334155;
                --text-primary: #e2e8f0;
                --text-secondary: #94a3b8;
            }
            body {
                background: var(--surface-bg);
                color: var(--text-primary);
            }
            h1, h2, h3 { color: var(--text-primary); }
            .site-header {
                background: rgba(17, 24, 39, .90);
                border-color: var(--border-subtle);
            }
            .brand-name, .nav-links-desktop a { color: var(--text-primary); }
            .nav-links-desktop a:hover { color: #ffffff; }
            
            .hero, .features-section[style*="background-color: #f8fafc;"], .pricing-section, .faq-section {
                background: var(--surface-bg);
                background-image: none; /* Remove light gradients */
                border-color: var(--border-subtle);
            }
            .features-section[style*="background-color: #ffffff;"], .reviews-section, .lead-form-section {
                background: var(--surface-card); /* Darker section bg */
                border-color: var(--border-subtle);
            }
            
            .hero-subtitle, .section-subtitle, .usp-list li { color: var(--text-secondary); }
            .usp-list li { background: var(--surface-hover); border-color: var(--border-subtle); }

            .feature-card, .pricing-card, .review-card, .lead-form-card, .faq-item, .common-perks {
                background: var(--surface-card);
                border-color: var(--border-subtle);
                box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
            }
            .features-section[style*="background-color: #f8fafc;"] .feature-icon,
            .features-section[style*="background-color: #ffffff;"] .feature-icon {
                border-color: var(--surface-card); /* Match card bg */
            }
            .pricing-card.popular {
                background: linear-gradient(180deg, #1f2937, var(--surface-card));
                border-color: var(--brand-2);
            }
            .pricing-toggle {
                background: var(--surface-bg);
                border-color: var(--border-subtle);
            }
            .toggle-btn {
                background: var(--surface-card);
                border-color: var(--border-subtle);
                color: var(--text-primary);
            }
            .toggle-btn:hover { border-color: #475569; }
            
            .review-card blockquote, .author .role, .faq-answer p { color: var(--text-secondary); }
            .author .name, .faq-question { color: var(--text-primary); }
            
            input[type="text"], input[type="tel"], input[type="url"], input[type="email"] {
                background: var(--surface-bg);
                border-color: var(--surface-hover);
                color: var(--text-primary);
            }
            input:focus {
                background: #0f2729;
                border-color: var(--brand-2);
                box-shadow: 0 0 0 3px rgba(0, 168, 150, 0.35);
            }
            .form-success-message { background: #064e3b; color: #a7f3d0; border-color: #059669; }
            .form-error-summary { background: #7f1d1d; color: #fecaca; border-color: #dc2626; }
        }

        /* ========================
            15. Scroll Animations (নতুন যোগ করা হয়েছে)
        ========================= */
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(25px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }

        .animate-on-scroll.is-visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* গ্রিড আইটেমগুলোর জন্য সুন্দর স্ট্যাগারড (staggered) ইফেক্ট */
        /* যখন গ্রিড দৃশ্যমান হবে, তখন এর ভেতরের আইটেমগুলো একটার পর একটা আসবে */
        .grid.is-visible .feature-card,
        .grid.is-visible .pricing-card,
        .grid.is-visible .review-card {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.5s ease-out 0.1s, transform 0.5s ease-out 0.1s;
        }

        .grid.is-visible .feature-card:nth-child(1),
        .grid.is-visible .pricing-card:nth-child(1),
        .grid.is-visible .review-card:nth-child(1) {
            opacity: 1; transform: translateY(0); transition-delay: 0.15s;
        }
        .grid.is-visible .feature-card:nth-child(2),
        .grid.is-visible .pricing-card:nth-child(2),
        .grid.is-visible .review-card:nth-child(2) {
            opacity: 1; transform: translateY(0); transition-delay: 0.25s;
        }
        .grid.is-visible .feature-card:nth-child(3),
        .grid.is-visible .pricing-card:nth-child(3),
        .grid.is-visible .review-card:nth-child(3) {
            opacity: 1; transform: translateY(0); transition-delay: 0.35s;
        }
        .grid.is-visible .feature-card:nth-child(4) {
            opacity: 1; transform: translateY(0); transition-delay: 0.45s;
        }
        .grid.is-visible .feature-card:nth-child(5) {
            opacity: 1; transform: translateY(0); transition-delay: 0.55s;
        }
        .grid.is-visible .feature-card:nth-child(6) {
            opacity: 1; transform: translateY(0); transition-delay: 0.65s;
        }

    /* =================================
   Form Select Box Style
==================================== */

/* "প্রতি মাসে বুস্ট করেন?" ড্রপডাউনের জন্য স্টাইল */
.form-group select {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #cbd5e1; /* আপনার বিদ্যমান বর্ডার কালার ব্যবহার করুন */
    border-radius: 8px;        /* আপনার বিদ্যমান বর্ডার-রেডিয়াস ব্যবহার করুন */
    font-size: 16px;
    background-color: #fff;
    line-height: 1.5;
    color: #111827; /* লেখার রঙ */
    
    /* ডিফল্ট OS স্টাইল রিমুভ করে */
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;

    /* কাস্টম ড্রপডাউন অ্যারো */
    /* SVG Arrow (URL-encoded gray color #4b5563) */
    background-image: url('data:image/svg+xml;utf8,<svg fill="%234b5563" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5H7z"></path></svg>');
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    
    /* অ্যারো-এর জন্য জায়গা তৈরি করা */
    padding-right: 40px;
}

/* প্লেস-হোল্ডার অপশনের স্টাইল (যেমন: "একটি অপশন বাছুন") */
.form-group select:required:invalid {
    color: #6b7280; /* placeholder-এর রঙ */
}

/* ড্রপডাউনের ভেতরের অপশনগুলোর রঙ */
.form-group option {
    color: #111827;
}

/* ফোকাস স্টাইল (অন্যান্য ইনপুটের সাথে মিল রেখে) */
/* আপনার style.css ফাইলে input:focus এর সাথে select:focus যোগ করুন */
/* উদাহরণ: 
.form-group input:focus,
.form-group select:focus {
    border-color: #007991; 
    box-shadow: 0 0 0 3px rgba(0, 121, 145, 0.1);
    outline: none;
}
*/


/* Trust Text Style */
.trust-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #e2e8f0;
    margin-bottom: 20px;
    border-left: 3px solid #007991;
    padding-left: 12px;
}

/* Verification Box Style */
.verification-box {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid #334155;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.badge-header {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #22c55e;
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 5px;
}

.dbid-number {
    color: #ffffff;
    font-size: 1.1rem;
    letter-spacing: 1px;
    margin: 5px 0;
}

.reg-date {
    color: #94a3b8;
    margin: 0;
}