:root{
    --bg:#0f172a;
    --panel:#ffffff;
    --line:#e5e7eb;
    --muted:#64748b;
    --text:#0f172a;
    --primary:#4f46e5;
    --primary-dark:#3730a3;
    --green:#059669;
    --purple:#7c3aed;
}

*{box-sizing:border-box}
body{
    margin:0;
    font-family: Inter, Arial, Helvetica, sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
    color:var(--text);
}
a{text-decoration:none;color:inherit}
.app-shell{
    display:grid;
    grid-template-columns: 260px 1fr;
    min-height:100vh;
}
.sidebar{
    background:#111827;
    color:#fff;
    padding:24px;
    position:sticky;
    top:0;
    height:100vh;
}
.brand{
    font-size:28px;
    font-weight:800;
    margin-bottom:24px;
}
.nav-link{
    display:block;
    padding:12px 14px;
    border-radius:12px;
    color:#d1d5db;
    margin-bottom:10px;
}
.nav-link:hover{background:#1f2937;color:#fff}
.main-content{
    padding:28px;
}
.alert{
    padding:14px 16px;
    border-radius:12px;
    margin-bottom:20px;
}
.alert.success{background:#dcfce7;color:#166534}
.alert.error{background:#fee2e2;color:#991b1b}
.hero-card,
.panel,
.option-card{
    background:rgba(255,255,255,.88);
    border:1px solid rgba(255,255,255,.7);
    box-shadow:0 15px 40px rgba(15,23,42,.08);
    backdrop-filter: blur(8px);
}
.hero-card{
    border-radius:24px;
    padding:32px;
    margin-bottom:24px;
}
.eyebrow{
    color:var(--primary);
    font-weight:700;
    text-transform:uppercase;
    letter-spacing:.08em;
    font-size:12px;
}
h1{
    margin:8px 0 12px;
    font-size:clamp(28px, 4vw, 42px);
    line-height:1.1;
}
h2{margin:0 0 10px}
.subtext,.muted{
    color:var(--muted);
    line-height:1.6;
}
.card-grid{
    display:grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap:20px;
}
.option-card{
    border-radius:22px;
    padding:24px;
    transition:transform .2s ease, box-shadow .2s ease;
}
.option-card:hover{
    transform:translateY(-4px);
    box-shadow:0 20px 44px rgba(15,23,42,.14);
}
.icon-circle{
    width:54px;
    height:54px;
    border-radius:999px;
    display:grid;
    place-items:center;
    background:var(--primary);
    color:#fff;
    font-weight:800;
    margin-bottom:16px;
}
.icon-circle.green{background:var(--green)}
.icon-circle.purple{background:var(--purple)}
.page-header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-bottom:20px;
}
.two-col{
    display:grid;
    grid-template-columns: 1.4fr .9fr;
    gap:20px;
}
.panel{
    border-radius:22px;
    padding:24px;
}
.field-grid{
    display:grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap:16px;
}
.field{
    display:flex;
    flex-direction:column;
    gap:8px;
}
.field label{
    font-size:14px;
    font-weight:600;
}
.field input,
.field select{
    width:100%;
    border:1px solid var(--line);
    background:#fff;
    border-radius:12px;
    padding:12px 14px;
    font-size:15px;
}
.primary-btn{
    margin-top:18px;
    background:linear-gradient(135deg, var(--primary), var(--primary-dark));
    color:#fff;
    border:none;
    border-radius:14px;
    padding:14px 18px;
    font-weight:700;
    cursor:pointer;
}
.primary-btn:hover{opacity:.95}
.result-list{
    display:grid;
    gap:12px;
}
.result-list > div{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:12px 14px;
    border-radius:12px;
    background:#f8fafc;
    border:1px solid #e2e8f0;
}
.total-box{
    margin-top:20px;
    padding:18px;
    border-radius:18px;
    background:#111827;
    color:#fff;
}
.total-box p{
    margin:0 0 8px;
    color:#cbd5e1;
}
.total-box h3{
    margin:0;
    font-size:34px;
}
.table-wrap{overflow:auto}
table{
    width:100%;
    border-collapse:collapse;
}
th,td{
    padding:12px;
    border-bottom:1px solid #e5e7eb;
    text-align:left;
    font-size:14px;
}
th{
    color:#475569;
    background:#f8fafc;
}

@media (max-width: 1100px){
    .card-grid{grid-template-columns:1fr}
    .two-col{grid-template-columns:1fr}
}
@media (max-width: 900px){
    .app-shell{
        grid-template-columns:1fr;
    }
    .sidebar{
        position:relative;
        height:auto;
    }
}
@media (max-width: 640px){
    .main-content{padding:16px}
    .hero-card,.panel,.option-card{padding:18px}
    .field-grid{grid-template-columns:1fr}
}
.helper-text{display:block;font-size:12px;color:#64748b;margin-top:6px;line-height:1.4}