```css
/* =====================================
   RESET
===================================== */

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

html{
    scroll-behavior:smooth;
}

body{
    font-family:'Poppins',sans-serif;
    background:#f8fafc;
    color:#334155;
    line-height:1.6;
    overflow-x:hidden;
}

img{
    max-width:100%;
    height:auto;
    display:block;
}

a{
    text-decoration:none;
}

ul{
    list-style:none;
}

/* =====================================
   HEADER
===================================== */

header{

    position:sticky;
    top:0;
    z-index:1000;

    background:#ffffff;

    display:flex;
    justify-content:space-between;
    align-items:center;

    padding:16px 24px;

    box-shadow:
    0 2px 12px rgba(15,23,42,0.05);
}

.logo img{

    height:36px;
    width:auto;
}

/* =====================================
   NAVIGATION
===================================== */

#navbar{

    display:flex;
    gap:20px;
}

#navbar li{

    position:relative;
}

#navbar a{

    color:#0f172a;

    font-weight:500;

    padding:10px 14px;

    border-radius:8px;

    transition:.3s;
}

#navbar a:hover{

    background:#eef2ff;
}

.dropdown-content{

    display:none;

    position:absolute;

    top:100%;
    left:0;

    min-width:220px;

    background:#ffffff;

    border-radius:12px;

    overflow:hidden;

    box-shadow:
    0 10px 25px rgba(0,0,0,0.08);
}

.dropdown-content li a{

    display:block;

    padding:12px 16px;
}

.dropdown:hover .dropdown-content{

    display:block;
}

/* =====================================
   HERO
===================================== */

.hero-section{

    background:#ffffff;
}

.hero-banner{

    max-width:1200px;

    margin:auto;
}

/* =====================================
   SECTION TITLE
===================================== */

.section-title{

    max-width:700px;

    margin:0 auto 45px;

    text-align:center;
}

.section-title h2{

    font-size:2rem;

    color:#0f172a;

    margin-bottom:12px;
}

.section-title p{

    color:#64748b;
}

/* =====================================
   WHAT YOU'LL FIND HERE
===================================== */

.what-you-get{

    padding:15px 20px;

    max-width:900px;

    margin:auto;
}

.feature-list{

    columns:2;

    column-gap:50px;

    margin-top:20px;
}

.feature-list li{

    margin-bottom:12px;

    color:#334155;

    font-weight:500;
}
@media(max-width:768px){

    .feature-list{

        columns:1;
    }

}
/* =====================================
   SUBJECT EXPLORER
===================================== */

.subject-explorer{

    padding:20px 20px 80px;
}

.subject-tabs{

    display:flex;

    justify-content:center;

    flex-wrap:wrap;

    gap:12px;

    margin-bottom:35px;
}

.subject-tab{

    border:none;

    background:#e2e8f0;

    color:#334155;

    padding:12px 24px;

    border-radius:999px;

    cursor:pointer;

    font-weight:600;

    transition:.3s;
}

.subject-tab.active{

    background:#4f46e5;

    color:#ffffff;
}

.lesson-panel{

    display:none;

    max-width:1100px;

    margin:auto;
}

.lesson-panel.active{

    display:block;
}

.lesson-grid{

    display:grid;

    grid-template-columns:
    repeat(auto-fit,minmax(220px,1fr));

    gap:15px;
}

.lesson-btn{

    background:#ffffff;

    border:1px solid #e5e7eb;

    border-radius:12px;

    padding:16px 18px;

    color:#0f172a;

    font-weight:500;

    transition:.3s;
}

.lesson-btn:hover{

    border-color:#4f46e5;

    background:#eef2ff;
}

/* =====================================
   HUBS
===================================== */

.learning-system{

    padding:20px 20px 80px;
}

.hub-grid{

    max-width:1000px;

    margin:auto;

    display:grid;

    grid-template-columns:
    repeat(auto-fit,minmax(320px,1fr));

    gap:25px;
}

.hub-card{

    background:#ffffff;

    border:1px solid #e5e7eb;

    border-radius:18px;

    padding:32px;

    text-align:center;

    box-shadow:
    0 4px 12px rgba(15,23,42,0.04);
}

.hub-icon{

    font-size:36px;

    margin-bottom:16px;
}

.hub-card h3{

    color:#0f172a;

    margin-bottom:14px;
}

.hub-card p{

    color:#64748b;

    margin-bottom:20px;
}

.hub-btn{

    display:inline-block;

    color:#4f46e5;

    font-weight:600;
}

/* =====================================
   FEATURED MQ
===================================== */

.featured-mq{

    padding:0 20px 80px;
}

.mq-container{

    max-width:1100px;

    margin:auto;

    background:#ffffff;

    border:1px solid #e5e7eb;

    border-radius:18px;

    padding:22px;

    display:flex;

    align-items:center;

    gap:24px;
}

.mq-image{

    width:260px;

    flex-shrink:0;
}

.mq-content{

    flex:1;
}

.mq-heading{

    color:#6d28d9;

    font-size:14px;

    font-weight:600;

    margin-bottom:10px;
}

.mq-content h2{

    color:#0f172a;

    margin-bottom:12px;
}

.mq-subtitle{

    color:#64748b;
}

.mq-action a{

    display:inline-block;

    background:#6d28d9;

    color:#ffffff;

    padding:12px 20px;

    border-radius:8px;
}

/* =====================================
   STORE
===================================== */

.store-showcase{

    padding:0 20px 80px;
}

.store-banner{

    display:block;

    max-width:1100px;

    margin:auto;
}

.store-banner img{

    border-radius:18px;

    box-shadow:
    0 10px 30px rgba(15,23,42,0.08);
}

/* =====================================
   FOOTER
===================================== */

.footer{

    background:#0f172a;

    color:#cbd5e1;

    padding:60px 20px 25px;
}

.footer-grid{

    max-width:1100px;

    margin:auto;

    display:grid;

    grid-template-columns:
    repeat(auto-fit,minmax(220px,1fr));

    gap:35px;
}

.footer-column h3,
.footer-column h4{

    color:#ffffff;

    margin-bottom:14px;
}

.footer-column a{

    display:block;

    color:#94a3b8;

    margin-bottom:10px;

    transition:.3s;
}

.footer-column a:hover{

    color:#60a5fa;
}

.footer-column p{

    color:#94a3b8;
}

.footer-bottom{

    margin-top:40px;

    padding-top:20px;

    border-top:
    1px solid rgba(255,255,255,.08);

    text-align:center;

    color:#94a3b8;
}

/* =====================================
   MOBILE
===================================== */

@media(max-width:768px){

    header{

        justify-content:center;

        padding:16px;
    }

    nav{

        display:none;
    }

    .what-you-get{

        padding:60px 16px;
    }

    .subject-explorer{

        padding:20px 16px 60px;
    }

    .learning-system{

        padding:0 16px 60px;
    }

    .featured-mq{

        padding:0 16px 60px;
    }

    .store-showcase{

        padding:0 16px 60px;
    }

    .mq-container{

        flex-direction:column;

        text-align:center;
    }

    .mq-image{

        width:100%;
    }

    .hub-grid{

        grid-template-columns:1fr;
    }

    .footer-grid{

        grid-template-columns:1fr;

        text-align:center;
    }

    .section-title h2{

        font-size:1.7rem;
    }

}
```