:root{
--bg:#fafafa;
--card:#ffffff;
--accent:#7cc4a3;
--muted:#6b7280;
--header-bg:#f0f9f6;
--danger:#f87171;
}


*{box-sizing:border-box}
body{
margin:0;
font-family:Inter,system-ui,Segoe UI,Roboto,'Helvetica Neue',Arial;
background:var(--bg);
color:#111;
}
.site-header{
    
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:18px 24px;
    background:var(--header-bg);
    gap:16px
}

.site-header .brand h1{
    margin:0;
    font-size:1.5rem
}

.site-header .student{
    margin:0;
    font-size:0.9rem;
    color:var(--muted)
}
.controls{
    display:flex;
    gap:8px;
    align-items:center
}
.controls select,.controls input{
    padding:8px;
    border-radius:8px;
    border:1px solid #d1d5db;
    background:#fff
}
.controls button{
    padding:8px 12px;
    border-radius:8px;
    border:none;
    background:var(--accent);
    color:#fff;
    cursor:pointer
}
.container{
    display:grid;
    grid-template-columns:1fr 360px;
    gap:22px;
    padding:24px;
    max-width:1200px;
    margin:20px auto
}
.products{display:grid;
    grid-template-columns:
    repeat(auto-fill,
    minmax(220px,1fr));
    gap:18px}
.card{
    background:var(--card);
    padding:14px;
    border-radius:12px;
    box-shadow:0 4px 10px rgba(0,0,0,0.05);
    transition:transform .18s ease,
    box-shadow .18s ease}
.card:hover{
    transform:translateY(-4px);
    box-shadow:0 8px 20px rgba(0,0,0,0.08)
}
.card h3{
    margin:10px 0 6px;
    font-size:1.05rem}
.card p{
    margin:0 0 10px;
    color:var(--muted);
    font-size:0.9rem}
.card .price{
    font-weight:700;
    margin-bottom:10px}
.card button{
    padding:8px 10px;
    border-radius:8px;
    border:none;
    background:var(--accent);
    color:#fff;
    cursor:pointer}
.cart{
    background:var(--card);
    padding:12px;
    border-radius:12px;
    box-shadow:0 4px 10px rgba(0,0,0,0.05)
}
.cart table{
    width:100%;
    border-collapse:collapse
}
.cart th,.cart td{
    padding:8px 6px;
    text-align:left;
    border-bottom:1px solid #f0f2f6
}
.qty-input{
    width:64px}
.cart-footer{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding-top:12px}
.cart-actions button{
    padding:8px 10px;
    border-radius:8px;
    border:none;
    background:var(--danger);
    color:#fff}
.site-footer{
    text-align:center;
    padding:12px;
    color:var(--muted)}


@media(max-width:880px)
{.container
    {grid-template-columns:1fr;
    }
.cart{order:2}}


body.dark{
    background:#1e293b;
    color:#e6eef8}
body.dark .card,body.dark .cart,body.dark .site-header{
    background:#0f172a
}
body.dark .controls select,body.dark .controls input{
    background:#1e293b;
    color:#e6eef8;
    border:1px solid #334155}
body.dark .controls button{
    background:#38bdf8
}