.calc-form {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 24px;
    display: grid;
    gap: 18px;
}

.calc-field {
    display: grid;
    gap: 6px;
}

.calc-field label {
    font-size: 0.9rem;
    font-weight: 600;
}

.calc-field .field-hint {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 400;
}

.calc-field input,
.calc-field select {
    width: 100%;
    height: 46px;
    padding: 0 14px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background: #fff;
    color: var(--color-text);
    transition: border-color .15s ease, box-shadow .15s ease;
}

.calc-field select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%236b7280' d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    padding-right: 40px;
    cursor: pointer;
}

.calc-field input:focus,
.calc-field select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15);
}

.calc-field input::placeholder {
    color: #b0b6c0;
}

.calc-field label:has(input[type="checkbox"]) {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    cursor: pointer;
}

.calc-field input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.input-suffix {
    position: relative;
}

.input-suffix input {
    padding-right: 44px;
}

.input-suffix .suffix {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    font-size: 0.9rem;
    pointer-events: none;
}

.calc-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.calc-row .calc-field {
    gap: 6px;
}

@media (max-width: 520px) {
    .calc-row {
        grid-template-columns: 1fr;
    }
}

.calc-submit {
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    height: 48px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s ease, transform .1s ease, box-shadow .15s ease;
}

.calc-submit:hover {
    background: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
}

.calc-submit:active {
    transform: translateY(1px);
}

.calc-result {
    margin-top: 20px;
    padding: 22px 24px;
    border-radius: var(--radius-lg);
    background: var(--color-primary-bg);
    border: 1px solid var(--color-primary-border);
    display: none;
    animation: calc-result-in .2s ease;
}

@keyframes calc-result-in {
    from {
        opacity: 0;
        transform: translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.calc-result.is-visible {
    display: block;
}

.calc-result .result-label {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.calc-result .result-amount {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin: 4px 0 14px;
    letter-spacing: -0.02em;
}

.calc-result .result-breakdown {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    display: grid;
    gap: 6px;
    padding-top: 12px;
    border-top: 1px solid rgba(var(--color-primary-rgb), 0.15);
}

.calc-result .result-breakdown span {
    color: var(--color-text);
    font-weight: 600;
}

.calc-result.is-warning {
    background: #fff4e5;
    border-color: #ffdca8;
}

.calc-result.is-warning .result-amount {
    font-size: 1.3rem;
    color: #b45309;
}

.calc-result.is-warning .result-breakdown {
    border-top-color: rgba(180, 83, 9, 0.15);
}

.disclaimer {
    margin-top: 16px;
    font-size: 0.82rem;
    color: var(--color-text-muted);
}

.faq-section .faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 14px 18px;
    margin-bottom: 8px;
    transition: border-color .15s ease;
}

.faq-item:hover {
    border-color: #cfd4dc;
}

.faq-item summary {
    cursor: pointer;
    font-weight: 600;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: "+";
    font-size: 1.3rem;
    font-weight: 400;
    color: var(--color-text-muted);
    margin-left: 12px;
    flex-shrink: 0;
    transition: transform .15s ease;
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item p {
    margin: 10px 0 0;
    color: var(--color-text-muted);
}