:root {
            --primary: #4285f4;
            --primary-dark: #2563c7;
            --secondary: #db4437;
            --dark: #172033;
            --text: #5d6472;
            --light: #f6f9ff;
            --border: #e8edf5;
            --white: #ffffff;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'Cairo', sans-serif;
            color: var(--dark);
            background: #fff;
        }

        a {
            text-decoration: none;
        }

        /* =========================
           Navbar
        ========================== */

        .navbar {
            padding: 18px 0;
            background: rgba(255,255,255,.96);
            box-shadow: 0 2px 20px rgba(0,0,0,.05);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 25px;
            font-weight: 800;
        }

        .logo-icon {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), #73a7ff);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 22px;
        }

        .brand-blue {
            color: var(--primary);
        }

        .brand-red {
            color: var(--secondary);
        }

        .nav-link {
            color: #303746 !important;
            font-weight: 600;
            margin: 0 7px;
            position: relative;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--primary) !important;
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: -12px;
            right: 10px;
            left: 10px;
            height: 3px;
            border-radius: 10px;
            background: var(--primary);
        }

        .btn-primary-custom {
            background: var(--primary);
            border: none;
            color: white;
            padding: 11px 24px;
            border-radius: 10px;
            font-weight: 700;
            transition: .3s;
        }

        .btn-primary-custom:hover {
            background: var(--primary-dark);
            color: white;
            transform: translateY(-2px);
        }

        .btn-outline-custom {
            border: 2px solid var(--secondary);
            color: var(--secondary);
            padding: 9px 22px;
            border-radius: 10px;
            font-weight: 700;
            transition: .3s;
        }

        .btn-outline-custom:hover {
            background: var(--secondary);
            color: white;
        }

        /* =========================
           Hero
        ========================== */

        .hero {
            position: relative;
            overflow: hidden;
            padding: 90px 0 80px;
            background:
                radial-gradient(circle at 10% 20%, rgba(66,133,244,.12), transparent 30%),
                radial-gradient(circle at 90% 80%, rgba(219,68,55,.08), transparent 30%),
                #f8fbff;
        }

        .hero::before {
            content: "";
            position: absolute;
            width: 350px;
            height: 350px;
            border-radius: 50%;
            background: rgba(66,133,244,.07);
            top: -150px;
            left: -100px;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #eaf2ff;
            color: var(--primary);
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .hero h1 {
            font-size: clamp(38px, 5vw, 64px);
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 20px;
        }

        .hero h1 .blue {
            color: var(--primary);
        }

        .hero h1 .red {
            color: var(--secondary);
        }

        .hero p {
            color: var(--text);
            font-size: 18px;
            line-height: 2;
            max-width: 650px;
        }

        .hero-buttons {
            display: flex;
            gap: 14px;
            margin-top: 30px;
            flex-wrap: wrap;
        }

        .hero-image {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .student-card {
            width: 330px;
            height: 350px;
            border-radius: 35px;
            background: linear-gradient(145deg, var(--primary), #74a7ff);
            position: relative;
            box-shadow: 0 25px 60px rgba(66,133,244,.25);
            overflow: hidden;
        }

        .student-card::before {
            content: "";
            position: absolute;
            width: 260px;
            height: 260px;
            background: rgba(255,255,255,.12);
            border-radius: 50%;
            top: -90px;
            right: -80px;
        }

        .student-icon {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            width: 170px;
            height: 170px;
            border-radius: 50%;
            background: white;
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 100px;
        }

        .floating-card {
            position: absolute;
            background: white;
            padding: 14px 18px;
            border-radius: 15px;
            box-shadow: 0 10px 35px rgba(0,0,0,.1);
            font-weight: 700;
            display: flex;
            gap: 10px;
            align-items: center;
        }

        .floating-card i {
            color: var(--primary);
            font-size: 22px;
        }

        .float-one {
            top: 45px;
            right: 0;
        }

        .float-two {
            bottom: 45px;
            left: 0;
        }

        /* =========================
           Stats
        ========================== */

        .stats {
            margin-top: -35px;
            position: relative;
            z-index: 5;
        }

        .stats-box {
            background: white;
            border-radius: 18px;
            box-shadow: 0 15px 50px rgba(0,0,0,.08);
            padding: 25px;
        }

        .stat-item {
            text-align: center;
            border-left: 1px solid var(--border);
        }

        .stat-item:last-child {
            border-left: none;
        }

        .stat-number {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
        }

        .stat-label {
            color: var(--text);
            font-size: 14px;
        }

        /* =========================
           General Sections
        ========================== */

        .section {
            padding: 90px 0;
        }

        .section-light {
            background: var(--light);
        }

        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-title .small-title {
            color: var(--secondary);
            font-weight: 700;
            font-size: 15px;
            margin-bottom: 10px;
            display: block;
        }

        .section-title h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 15px;
        }

        .section-title p {
            color: var(--text);
            max-width: 650px;
            margin: auto;
        }

        /* =========================
           Stage Cards
        ========================== */

        .stage-card {
            background: white;
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 30px;
            height: 100%;
            transition: .35s;
            position: relative;
            overflow: hidden;
        }

        .stage-card:hover {
            transform: translateY(-8px);
            border-color: var(--primary);
            box-shadow: 0 20px 45px rgba(66,133,244,.12);
        }

        .stage-icon {
            width: 65px;
            height: 65px;
            border-radius: 18px;
            background: #eaf2ff;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 30px;
            margin-bottom: 20px;
        }

        .stage-card:nth-child(2) .stage-icon {
            background: #fff0ee;
            color: var(--secondary);
        }

        .stage-card h4 {
            font-weight: 800;
        }

        .stage-card p {
            color: var(--text);
            line-height: 1.9;
        }

        .stage-link {
            color: var(--primary);
            font-weight: 700;
        }

        /* =========================
           Features
        ========================== */

        .feature {
            display: flex;
            gap: 18px;
            margin-bottom: 30px;
        }

        .feature-icon {
            flex: 0 0 55px;
            width: 55px;
            height: 55px;
            background: #eaf2ff;
            color: var(--primary);
            border-radius: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }

        .feature:nth-child(even) .feature-icon {
            background: #fff0ee;
            color: var(--secondary);
        }

        .feature h5 {
            font-weight: 800;
            margin-bottom: 7px;
        }

        .feature p {
            color: var(--text);
            margin: 0;
            line-height: 1.8;
        }

        /* =========================
           Teachers
        ========================== */

        .teacher-card {
            background: white;
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 25px;
            text-align: center;
            height: 100%;
            transition: .3s;
        }

        .teacher-card:hover {
            transform: translateY(-7px);
            box-shadow: 0 20px 40px rgba(0,0,0,.08);
        }

        .teacher-avatar {
            width: 105px;
            height: 105px;
            border-radius: 50%;
            margin: 0 auto 18px;
            background: linear-gradient(135deg, #eaf2ff, #dce9ff);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 42px;
            font-weight: 800;
        }

        .teacher-card h5 {
            font-weight: 800;
        }

        .teacher-subject {
            color: var(--primary);
            font-size: 14px;
            font-weight: 700;
        }

        .rating {
            color: #f5b400;
            margin: 10px 0;
        }

        .teacher-info {
            color: var(--text);
            font-size: 14px;
        }

        /* =========================
           Articles
        ========================== */

        .article-card {
            border: 1px solid var(--border);
            border-radius: 18px;
            overflow: hidden;
            background: white;
            height: 100%;
            transition: .3s;
        }

        .article-card:hover {
            transform: translateY(-7px);
            box-shadow: 0 20px 45px rgba(0,0,0,.08);
        }

        .article-image {
            height: 190px;
            background: linear-gradient(135deg, #4285f4, #8bb5ff);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 70px;
            color: white;
            position: relative;
        }

        .article-card:nth-child(2) .article-image {
            background: linear-gradient(135deg, #db4437, #f18478);
        }

        .article-card:nth-child(3) .article-image {
            background: linear-gradient(135deg, #334155, #64748b);
        }

        .article-body {
            padding: 22px;
        }

        .article-category {
            color: var(--secondary);
            font-size: 13px;
            font-weight: 700;
        }

        .article-body h5 {
            font-weight: 800;
            line-height: 1.7;
            margin: 8px 0;
        }

        .article-body p {
            color: var(--text);
            font-size: 14px;
            line-height: 1.8;
        }

        .article-footer {
            border-top: 1px solid var(--border);
            padding-top: 15px;
            display: flex;
            justify-content: space-between;
            color: #8a91a0;
            font-size: 13px;
        }

        /* =========================
           CTA
        ========================== */

        .cta {
            padding: 70px 0;
        }

        .cta-box {
            background: linear-gradient(120deg, var(--primary), #2466ca);
            border-radius: 30px;
            padding: 55px;
            color: white;
            position: relative;
            overflow: hidden;
        }

        .cta-box::after {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255,255,255,.08);
            left: -100px;
            bottom: -180px;
        }

        .cta-box h2 {
            font-weight: 800;
            font-size: 35px;
        }

        .cta-box p {
            opacity: .9;
            line-height: 2;
        }

        .btn-white {
            background: white;
            color: var(--primary);
            border: none;
            padding: 13px 28px;
            border-radius: 10px;
            font-weight: 800;
        }

        .btn-white:hover {
            background: #f3f6ff;
            color: var(--primary-dark);
        }

        /* =========================
           Footer
        ========================== */

        footer {
            background: #101827;
            color: white;
            padding-top: 65px;
        }

        .footer-brand {
            font-size: 25px;
            font-weight: 800;
            margin-bottom: 18px;
        }

        footer p {
            color: #aeb7c7;
            line-height: 2;
        }

        footer h5 {
            font-weight: 800;
            margin-bottom: 20px;
        }

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

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

        .footer-links a {
            color: #aeb7c7;
            transition: .2s;
        }

        .footer-links a:hover {
            color: white;
            padding-right: 5px;
        }

        .social-links {
            display: flex;
            gap: 10px;
        }

        .social-links a {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #202b3e;
            color: white;
            transition: .3s;
        }

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

        .copyright {
            border-top: 1px solid #263247;
            margin-top: 50px;
            padding: 20px 0;
            color: #8792a5;
            font-size: 14px;
        }

        /* =========================
           Responsive
        ========================== */

        @media (max-width: 991px) {

            .navbar {
                padding: 12px 0;
            }

            .nav-link.active::after {
                display: none;
            }

            .hero {
                padding: 60px 0;
            }

            .hero-image {
                margin-top: 40px;
            }

            .stats {
                margin-top: 0;
                padding-top: 20px;
            }

            .stat-item {
                border-left: none;
                border-bottom: 1px solid var(--border);
                padding: 15px;
            }

            .stat-item:last-child {
                border-bottom: none;
            }
        }

        @media (max-width: 576px) {

            .hero h1 {
                font-size: 36px;
            }

            .hero p {
                font-size: 16px;
            }

            .hero-buttons {
                flex-direction: column;
            }

            .hero-buttons a {
                text-align: center;
                width: 100%;
            }

            .student-card {
                width: 270px;
                height: 300px;
            }

            .floating-card {
                font-size: 12px;
            }

            .float-one {
                right: -5px;
            }

            .float-two {
                left: -5px;
            }

            .section {
                padding: 65px 0;
            }

            .section-title h2 {
                font-size: 29px;
            }

            .cta-box {
                padding: 35px 25px;
                text-align: center;
            }

            .cta-box h2 {
                font-size: 28px;
            }
        }