:root{
    --bg:#f5f7fb;
    --panel:#ffffff;
    --panel-2:#f0f4ff;
    --text:#182033;
    --muted:#6f7b91;
    --line:#e8edf7;
    --primary:#4f46e5;
    --primary-2:#6d63ff;
    --success:#19c37d;
    --dark:#0f172a;
    --warning:#ffb020;
    --shadow:0 10px 30px rgba(31, 41, 55, .08);
    --radius:18px;
}

*{
    box-sizing:border-box;
}

html,
body{
    margin:0;
    padding:0;
    font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
    background:var(--bg);
    color:var(--text);
}

a{
    text-decoration:none;
    color:inherit;
}

button{
    font:inherit;
}

img{
    max-width:100%;
}

.container{
    width:min(1660px, calc(100% - 20px));
    margin:0 auto;
}

.page{
    padding:22px 0 40px;
}

.card{
    background:var(--panel);
    border:1px solid var(--line);
    border-radius:22px;
    box-shadow:var(--shadow);
}

.section{
    margin-top:22px;
}

.content-grid{
    display:grid;
    grid-template-columns:1fr 320px;
    gap:18px;
    align-items:start;
}

.hero-grid{
    display:grid;
    grid-template-columns:280px 1fr 320px;
    gap:18px;
    align-items:stretch;
}

/* topbar */
.topbar{
    background:linear-gradient(90deg,#111827,#1f2937);
    color:#fff;
    font-size:13px;
}

.topbar-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    min-height:40px;
    gap:18px;
}

.topbar-left,
.topbar-right{
    display:flex;
    align-items:center;
    gap:18px;
    flex-wrap:wrap;
}

.topbar .muted{
    color:rgba(255,255,255,.72);
}

/* header */
.header{
    background:linear-gradient(180deg,#ffffff 0%, #f8fbff 100%);
    border-bottom:1px solid #dbe7ff;
    position:sticky;
    top:0;
    z-index:50;
    backdrop-filter:blur(8px);
    box-shadow:0 10px 30px rgba(37,99,235,.08);
}

.header-inner{
    display:grid;
    grid-template-columns:220px minmax(320px,1fr) auto;
    align-items:center;
    gap:18px;
    min-height:86px;
}

.brand{
    display:flex;
    align-items:center;
    gap:12px;
}

.brand-badge{
    width:44px;
    height:44px;
    border-radius:14px;
    background:linear-gradient(135deg,var(--primary),#8b5cf6);
    color:#fff;
    display:flex;
    align-items:center;
    justify-content:center;
    font-weight:800;
    box-shadow:0 10px 24px rgba(79,70,229,.24);
}

.brand-title{
    line-height:1.05;
}

.brand-title strong{
    display:block;
    font-size:20px;
    letter-spacing:.2px;
}

.brand-title span{
    display:block;
    color:var(--muted);
    font-size:12px;
    margin-top:4px;
}

.search-wrap{
    display:flex;
    align-items:center;
    gap:12px;
}

.search-box{
    flex:1;
    position:relative;
}

.search-box input{
    width:100%;
    height:52px;
    border:1px solid var(--line);
    background:#f8faff;
    border-radius:16px;
    padding:0 18px 0 48px;
    outline:none;
    font-size:15px;
    transition:.2s ease;
}

.search-box input:focus{
    border-color:#c7d2fe;
    background:#fff;
    box-shadow:0 0 0 4px rgba(99,102,241,.08);
}

.search-box i{
    position:absolute;
    left:17px;
    top:50%;
    transform:translateY(-50%);
    color:var(--muted);
    font-size:15px;
}

/* header actions */
.header-actions{
    display:flex;
    align-items:center;
    gap:10px;
    flex-wrap:wrap;
    justify-content:flex-end;
}

.action-btn{
    height:44px;
    border-radius:14px;
    border:1px solid var(--line);
    background:#fff;
    color:var(--text);
    padding:0 16px;
    display:inline-flex;
    align-items:center;
    gap:10px;
    cursor:pointer;
    transition:.2s ease;
    font-weight:600;
}

.action-btn:hover{
    transform:translateY(-1px);
    box-shadow:var(--shadow);
}

.action-btn.primary{
    background:linear-gradient(135deg,var(--primary),var(--primary-2));
    color:#fff;
    border:none;
}

.action-btn.success{
    background:linear-gradient(135deg,#18b779,#27d899);
    color:#fff;
    border:none;
}

.action-btn.dark{
    background:#111827;
    color:#fff;
    border:none;
}

.action-link-small{
    display:inline-flex;
    align-items:center;
    gap:8px;
    color:var(--muted);
    font-size:13px;
    padding:0 4px;
}

/* user box */
.user-box{
    display:flex;
    align-items:center;
    gap:10px;
    padding:8px 12px;
    border-radius:16px;
    background:linear-gradient(135deg,#eef4ff,#ffffff);
    border:1px solid #dbe7ff;
    min-height:48px;
}

.user-avatar{
    width:42px;
    height:42px;
    border-radius:14px;
    display:flex;
    align-items:center;
    justify-content:center;
    background:linear-gradient(135deg,#4f46e5,#2563eb);
    color:#fff;
    box-shadow:0 10px 20px rgba(79,70,229,.20);
    flex:0 0 auto;
}

.user-meta{
    line-height:1.1;
}

.user-meta strong{
    display:block;
    font-size:14px;
    color:#0f172a;
}

.user-meta span{
    display:block;
    font-size:12px;
    color:#64748b;
    margin-top:4px;
}

/* cart button */
.cart-btn{
    position:relative;
}

.cart-count{
    position:absolute;
    top:-6px;
    right:-6px;
    min-width:20px;
    height:20px;
    border-radius:999px;
    background:#ef4444;
    color:#fff;
    font-size:11px;
    display:flex;
    align-items:center;
    justify-content:center;
    font-weight:700;
    padding:0 6px;
}

/* nav */
.nav{
    background:linear-gradient(90deg,#1e3a8a 0%, #2563eb 45%, #4f46e5 100%);
    border-bottom:1px solid rgba(255,255,255,.08);
    box-shadow:0 10px 24px rgba(37,99,235,.16);
}

.nav-inner{
    min-height:62px;
    display:flex;
    align-items:center;
    gap:12px;
    flex-wrap:wrap;
}

.nav-link{
    display:inline-flex;
    align-items:center;
    gap:10px;
    padding:11px 16px;
    border-radius:14px;
    color:#ffffff;
    font-size:14px;
    font-weight:700;
    transition:.2s ease;
}

.nav-link:hover{
    background:rgba(255,255,255,.16);
    color:#ffffff;
    transform:translateY(-1px);
}

.nav-link.active{
    background:rgba(255,255,255,.20);
    box-shadow:inset 0 0 0 1px rgba(255,255,255,.18);
}

/* generic section head */
.section-head{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
    margin-bottom:14px;
}

.section-head h2{
    margin:0;
    font-size:24px;
    letter-spacing:-.02em;
}

.section-head p{
    margin:4px 0 0;
    color:var(--muted);
    font-size:14px;
}

/* side info */
.side-info{
    display:flex;
    flex-direction:column;
    gap:18px;
}

.info-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:20px;
    padding:18px;
    box-shadow:var(--shadow);
}

.info-card h3{
    margin:0 0 12px;
    font-size:17px;
}

.info-list{
    display:flex;
    flex-direction:column;
    gap:12px;
}

.info-item{
    display:flex;
    gap:12px;
    align-items:flex-start;
}

.info-item i{
    width:36px;
    height:36px;
    border-radius:12px;
    background:#eef2ff;
    color:var(--primary);
    display:flex;
    align-items:center;
    justify-content:center;
    flex:0 0 auto;
}

.info-item strong{
    display:block;
    font-size:14px;
    margin-bottom:4px;
}

.info-item span{
    display:block;
    color:var(--muted);
    font-size:12px;
    line-height:1.6;
}

/* responsive */
@media (max-width:1200px){
    .hero-grid{
        grid-template-columns:240px 1fr;
    }

    .content-grid{
        grid-template-columns:1fr;
    }
}

@media (max-width:900px){
    .header-inner{
        grid-template-columns:1fr;
        padding:12px 0;
    }

    .hero-grid{
        grid-template-columns:1fr;
    }
}

@media (max-width:640px){
    .container{
        width:min(100% - 20px, 1400px);
    }

    .topbar-inner{
        padding:6px 0;
    }

    .nav-inner{
        gap:6px;
    }
}