.adv401k-container {
    max-width: 820px;
    margin: 2rem auto;
    padding: 1.5rem;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    background: #fff;
    font-family: system-ui, sans-serif;
    box-sizing: border-box;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

label {
    font-weight: 600;
    display: block;
    margin-bottom: 0.4rem;
}

input, select {
    width: 100%;
    padding: 0.6rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

button {
    background: #0066cc;
    color: white;
    border: none;
    padding: 0.8rem 1.4rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
}

button:hover {
    background: #0055aa;
}

.result-box {
    margin: 2rem 0;
    padding: 1.2rem;
    background: #f8f9fa;
    border-radius: 6px;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    border: 1px solid #ddd;
    padding: 0.7rem;
    text-align: right;
}

th {
    background: #eef;
}

.export-row {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.export-row button {
    flex: 1;
    min-width: 120px;
}

.disclaimer {
    font-size: 0.9rem;
    color: #666;
    margin-top: 2rem;
    text-align: center;
}

/* Mobile stacking */
@media (max-width: 768px) {
    .adv401k-container {
        padding: 1rem;
    }
    .form-grid {
        grid-template-columns: 1fr;
    }
    .export-row {
        flex-direction: column;
    }
    .export-row button {
        margin: 0.5rem 0;
    }
}