:root{
    --bg:#0f172a;
    --panel:#111827;
    --card:#ffffff;
    --muted:#6b7280;
    --text:#111827;
    --line:#e5e7eb;
    --brand:#2563eb;
}

*{box-sizing:border-box}
body{
    margin:0;
    font-family:Arial,Helvetica,sans-serif;
    background:#f8fafc;
    color:var(--text);
}

.app-shell{
    min-height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
    padding:32px;
}

.hero-card{
    width:min(760px,100%);
    background:var(--card);
    border:1px solid var(--line);
    border-radius:18px;
    padding:32px;
    box-shadow:0 10px 30px rgba(0,0,0,.06);
}

.hero-badge{
    display:inline-block;
    font-size:12px;
    font-weight:700;
    letter-spacing:.08em;
    color:#fff;
    background:var(--brand);
    border-radius:999px;
    padding:8px 12px;
    margin-bottom:14px;
}

.hero-card h1{
    margin:0 0 12px;
    font-size:34px;
}

.hero-card p{
    margin:0 0 18px;
    color:var(--muted);
    line-height:1.6;
}

.hero-actions{
    display:flex;
    gap:12px;
    flex-wrap:wrap;
}

.hero-actions a{
    text-decoration:none;
    border:1px solid var(--line);
    border-radius:10px;
    padding:10px 14px;
    color:var(--text);
    background:#fff;
}

.sup-wrap{
    display:flex;
    min-height:100vh;
}

.sup-sidebar{
    width:260px;
    background:var(--bg);
    color:#fff;
    padding:20px;
}

.sup-sidebar-brand{
    display:flex;
    flex-direction:column;
    gap:6px;
    padding-bottom:18px;
    margin-bottom:18px;
    border-bottom:1px solid rgba(255,255,255,.1);
}

.sup-sidebar-brand span{
    color:rgba(255,255,255,.65);
    font-size:13px;
}

.sup-nav{
    display:flex;
    flex-direction:column;
    gap:8px;
}

.sup-nav-link{
    text-decoration:none;
    color:#fff;
    padding:10px 12px;
    border-radius:10px;
    background:transparent;
}

.sup-nav-link:hover,
.sup-nav-link.is-active{
    background:rgba(255,255,255,.12);
}

.sup-main{
    flex:1;
    padding:28px;
}

.sup-page-head h1{
    margin:0 0 8px;
}

.sup-page-head p{
    margin:0 0 22px;
    color:var(--muted);
}

.sup-card-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:16px;
    margin-bottom:18px;
}

.sup-card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:16px;
    padding:18px;
}

.sup-card strong{
    display:block;
    margin-bottom:8px;
}