.calc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}
.calc-card {
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
}
.calc-card .label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
}
.calc-card .value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}
.calc-card .value.savings {
    color: #16a34a;
}
.rate-best {
    background: #dcfce7;
    font-weight: 600;
}
.info-box a,
.highlight-box a {
    color: var(--primary, #1d4ed8);
}
@media (prefers-color-scheme: dark) {
    .calc-card {
        background: #1e293b;
        border-color: #334155;
    }
    .calc-card .label {
        color: #94a3b8;
    }
    .calc-card .value {
        color: #60a5fa;
    }
    .calc-card .value.savings {
        color: #4ade80;
    }
    .rate-best {
        background: #14532d;
    }
    .rate-best a {
        color: #86efac;
    }
}
@media print {
    details { display: block !important; }
    details > summary { display: none !important; }
}