/* === BASE STYLES === */:root {
            --primary-flame: #E74C3C;
            --primary-crimson: #C0392B;
            --accent-electric: #00F5FF;
            --accent-turquoise: #1ABC9C;
            --dark-obsidian: #0A0E14;
            --dark-slate: #1A1F2E;
            --dark-steel: #2C3442;
            --light-pearl: #ECF0F1;
            --light-cloud: #F8F9FA;
            --gold-highlight: #F39C12;
            --gradient-fire: linear-gradient(135deg, #E74C3C 0%, #C0392B 100%);
            --gradient-ice: linear-gradient(135deg, #00F5FF 0%, #1ABC9C 100%);
            --gradient-dark: linear-gradient(180deg, #0A0E14 0%, #1A1F2E 100%);
            --shadow-glow: 0 0 40px rgba(231, 76, 60, 0.3);
            --shadow-deep: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.3);
            --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', sans-serif;
            background: var(--dark-obsidian);
            color: var(--light-pearl);
            line-height: 1.6;
            overflow-x: hidden;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: 'Montserrat', sans-serif;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.5rem;
        }

        h1 {
            font-size: clamp(2.5rem, 5vw, 4.5rem);
            background: linear-gradient(135deg, var(--accent-electric), var(--primary-flame));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: 0 0 80px rgba(0, 245, 255, 0.3);
        }

        h2 {
            font-size: clamp(2rem, 4vw, 3.5rem);
            color: var(--light-cloud);
            position: relative;
            display: inline-block;
        }

        section.container h1 {
            font-size: clamp(2rem, 4vw, 3rem);
        }

        section.container h2 {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
        }

        @media (max-width: 767px) {
            section.container {
                padding-top: 9rem !important;
            }
        }

        h3 {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            color: var(--accent-electric);
            margin-top: 3rem;
        }

        p {
            font-size: 1.1rem;
            color: var(--light-pearl);
            margin-bottom: 1.5rem;
            font-weight: 400;
        }

        a {
            color: var(--accent-electric);
            text-decoration: none;
            transition: var(--transition-smooth);
        }

        a:hover {
            color: var(--accent-turquoise);
        }

        .container {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        .btn {
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            font-size: 1.1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition-smooth);
            text-transform: uppercase;
            letter-spacing: 1px;
            display: inline-block;
            position: relative;
            overflow: hidden;
            min-width: 200px;
            text-align: center;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.2);
            transform: translate(-50%, -50%);
            transition: width 0.6s, height 0.6s;
        }

        .btn:hover::before {
            width: 300px;
            height: 300px;
        }

        .btn-primary {
            background: var(--gradient-fire);
            color: white;
            box-shadow: var(--shadow-glow);
        }

        .btn-primary:hover {
            transform: translateY(-3px) scale(1.05);
            box-shadow: 0 0 60px rgba(231, 76, 60, 0.6);
        }

        .cta-button {
            background: var(--gradient-fire);
            color: white;
            box-shadow: var(--shadow-glow);
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
            padding: 1rem 2.5rem;
            border-radius: 50px;
            font-size: 1.1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition-smooth);
            text-transform: uppercase;
            letter-spacing: 1px;
            display: inline-block;
            position: relative;
            overflow: hidden;
            min-width: 200px;
            text-align: center;
            text-decoration: none;
        }

        .cta-button::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.2);
            transform: translate(-50%, -50%);
            transition: width 0.6s, height 0.6s;
        }

        .cta-button:hover {
            transform: translateY(-3px) scale(1.05);
            box-shadow: 0 0 60px rgba(231, 76, 60, 0.6);
            color: white;
        }

        .cta-button:hover::before {
            width: 300px;
            height: 300px;
        }

        .card {
            background: var(--dark-slate);
            border-radius: 20px;
            padding: 2.5rem;
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            border: 1px solid rgba(255, 255, 255, 0.1);
            height: 100%;
        }

        .card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-deep);
            border-color: var(--accent-electric);
        }

        .card p {
            color: var(--light-pearl);
        }

        /* === LAYOUT STYLES === */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 20, 0.95);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding: 1rem 0;
        }

        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .logo a {
            font-family: 'Montserrat', sans-serif;
            font-size: 1.75rem;
            font-weight: 900;
            text-decoration: none;
            background: linear-gradient(135deg, var(--accent-electric), var(--primary-flame));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            transition: var(--transition-smooth);
            display: inline-block;
        }

        .logo a:hover {
            transform: scale(1.05);
            filter: brightness(1.1);
        }

        nav {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 2rem;
            margin: 0;
            padding: 0;
            align-items: center;
        }

        .nav-menu li a {
            font-family: 'Montserrat', sans-serif;
            font-weight: 600;
            font-size: 1rem;
            color: var(--light-pearl);
            transition: var(--transition-smooth);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .nav-menu li a:hover {
            color: var(--accent-electric);
            text-shadow: 0 0 20px rgba(0, 245, 255, 0.5);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            background: none;
            border: none;
            cursor: pointer;
            padding: 0;
            width: 30px;
            height: 24px;
            justify-content: space-between;
        }

        .hamburger span {
            width: 100%;
            height: 3px;
            background: var(--accent-electric);
            transition: var(--transition-smooth);
            border-radius: 2px;
        }

        .hamburger[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(10.5px) rotate(45deg);
        }

        .hamburger[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }

        .hamburger[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-10.5px) rotate(-45deg);
        }

        footer {
            background: var(--gradient-dark);
            padding: 4rem 0 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 6rem;
        }

        .footer-content {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 3rem;
        }

        .footer-links ul {
            list-style: none;
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: var(--light-pearl);
            font-weight: 500;
        }

        .footer-info {
            text-align: right;
        }

        .footer-info p {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 0.5rem;
        }

        @media (max-width: 767px) {
            header .container {
                position: relative;
            }

            .logo {
                order: 1;
            }

            .hamburger {
                display: flex;
                order: 2;
            }

            nav {
                order: 4;
                width: 100%;
                margin-top: 1rem;
            }

            header .cta-button {
                order: 3;
                width: 100%;
                margin-top: 1rem;
                display: block;
            }

            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 0;
                background: var(--dark-slate);
                border-radius: 10px;
                padding: 1rem;
                margin-top: 1rem;
            }

            .nav-menu.active {
                display: flex;
            }

            .nav-menu li {
                width: 100%;
                text-align: center;
                padding: 0.75rem 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }

            .nav-menu li:last-child {
                border-bottom: none;
            }

            .footer-content {
                flex-direction: column;
                gap: 2rem;
            }

            .footer-links ul {
                flex-direction: column;
                gap: 1rem;
            }

            .footer-info {
                text-align: left;
            }
        }

@media (max-width: 767px) {
            header .container {
                position: relative;
            }

            .logo {
                order: 1;
            }

            .hamburger {
                display: flex;
                order: 2;
            }

            nav {
                order: 4;
                width: 100%;
                margin-top: 1rem;
            }

            header .cta-button {
                order: 3;
                width: 100%;
                margin-top: 1rem;
                display: block;
            }

            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                gap: 0;
                background: var(--dark-slate);
                border-radius: 10px;
                padding: 1rem;
                margin-top: 1rem;
            }

            .nav-menu.active {
                display: flex;
            }

            .nav-menu li {
                width: 100%;
                text-align: center;
                padding: 0.75rem 0;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            }

            .nav-menu li:last-child {
                border-bottom: none;
            }

            .footer-content {
                flex-direction: column;
                gap: 2rem;
            }

            .footer-links ul {
                flex-direction: column;
                gap: 1rem;
            }

            .footer-info {
                text-align: left;
            }
        }

@media (max-width: 767px) {
            main {
                padding-top: 180px;
            }

            section {
                padding: 3rem 0;
            }

            .hero-section {
                min-height: auto;
                padding: 4rem 0;
            }

            h2 {
                font-size: 2rem;
            }

            h3 {
                font-size: 1.5rem;
            }

            p {
                font-size: 1rem;
            }

            .btn,
            .cta-button {
                padding: 0.875rem 2rem;
                font-size: 1rem;
            }

            .cards-grid-3 {
                grid-template-columns: 1fr;
            }

            .toc-list {
                grid-template-columns: 1fr;
            }

            .timeline-item,
            .feature-block,
            .text-block,
            .highlight-box,
            .highlight-list,
            .numbered-list,
            .steps-list,
            .feature-item,
            .card {
                padding: 1.5rem;
            }

            .comparison-table th,
            .comparison-table td {
                padding: 1rem;
                font-size: 0.9rem;
            }

            .accordion-header {
                padding: 1.5rem;
                font-size: 1.2rem;
            }

            .accordion-header::after {
                right: 1.5rem;
                font-size: 1.5rem;
            }

            .accordion-body > div {
                padding: 0 1.5rem 1.5rem 1.5rem;
            }
        }