.sj-calc-wrap {
    margin: 25px 0;
}

.sj-calc-card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.05);
}

.sj-calc-card h2 {
    margin-bottom: 20px;
    font-size: 28px;
    color: #111827;
}

.sj-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.sj-grid label {
    display: flex;
    flex-direction: column;
    font-weight: 600;
    color: #374151;
    font-size: 15px;
}

.sj-grid input {
    margin-top: 8px;
    padding: 12px 14px;
    border: 1px solid #d1d5db;
    border-radius: 12px;
    font-size: 16px;
    width: 100%;
    box-sizing: border-box;
}

.sj-btn {
    background: #0f172a;
    color: #fff;
    border: none;
    padding: 14px 18px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 700;
    transition: 0.3s ease;
}

.sj-btn:hover {
    background: #1d4ed8;
}

.sj-result {
    grid-column: 1 / -1;
    background: #f8fafc;
    border-left: 5px solid #1d4ed8;
    padding: 18px;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    color: #111827;
}

.sj-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.sj-tab-btn {
    background: #f1f5f9;
    border: none;
    padding: 10px 14px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
}

.sj-tab-btn.active {
    background: #1d4ed8;
    color: #fff;
}

.sj-tab-content {
    display: none;
}

.sj-tab-content.active {
    display: block;
}

.sj-amort-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    overflow-x: auto;
}

.sj-amort-table th,
.sj-amort-table td {
    border: 1px solid #ddd;
    padding: 10px;
    text-align: center;
    font-size: 14px;
}

@media (max-width: 768px) {
    .sj-grid {
        grid-template-columns: 1fr;
    }

    .sj-calc-card {
        padding: 18px;
    }

    .sj-calc-card h2 {
        font-size: 24px;
    }
}