.stvc-calculator-wrapper,
#stvc-calculator-form {
    direction: rtl;
    text-align: right;
    font-family: inherit;
    box-sizing: border-box;
}

#stvc-calculator-form *,
#stvc-calculator-form *::before,
#stvc-calculator-form *::after {
    box-sizing: border-box;
}

#stvc-calculator-form {
    width: 100%;
    max-width: 920px;
    margin: 0 auto;
    padding: 20px;
    background: #ffffff;
    border: 1px solid #d9dee7;
    border-radius: 8px;
}

.stvc-form-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 16px;
}

.stvc-form-group {
    min-width: 0;
}

.stvc-form-group label,
.stvc-checkbox-label {
    display: block;
    margin-bottom: 7px;
    font-size: 14px;
    font-weight: 700;
    color: #1f2937;
    line-height: 1.7;
}

.stvc-input,
.stvc-select,
#stvc-calculator-form input[type="text"],
#stvc-calculator-form input[type="number"],
#stvc-calculator-form select {
    width: 100%;
    min-height: 44px;
    padding: 9px 12px;
    border: 1px solid #cfd6e2;
    border-radius: 6px;
    background: #ffffff;
    color: #111827;
    font-size: 15px;
    line-height: 1.6;
    font-family: inherit;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.stvc-input:focus,
.stvc-select:focus,
#stvc-calculator-form input[type="text"]:focus,
#stvc-calculator-form input[type="number"]:focus,
#stvc-calculator-form select:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

.stvc-input::placeholder {
    color: #9ca3af;
}

.stvc-checkbox-group {
    display: flex;
    align-items: flex-end;
    min-height: 72px;
}

.stvc-checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0;
    cursor: pointer;
    user-select: none;
}

.stvc-checkbox-label input[type="checkbox"],
#stvc-calculator-form input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin: 0;
    accent-color: #2563eb;
}

.stvc-form-actions {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    margin-top: 20px;
}

.stvc-submit-button,
#stvc-calculator-form button[type="submit"] {
    min-height: 44px;
    padding: 10px 22px;
    border: 0;
    border-radius: 6px;
    background: #1d4ed8;
    color: #ffffff;
    font-size: 15px;
    font-weight: 700;
    line-height: 1.6;
    font-family: inherit;
    cursor: pointer;
    transition: background-color 0.15s ease, transform 0.15s ease;
}

.stvc-submit-button:hover,
#stvc-calculator-form button[type="submit"]:hover {
    background: #1e40af;
}

.stvc-submit-button:active,
#stvc-calculator-form button[type="submit"]:active {
    transform: translateY(1px);
}

.stvc-submit-button:disabled,
#stvc-calculator-form button[type="submit"]:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

#stvc-result,
.stvc-result {
    display: none;
    margin-top: 20px;
    padding: 14px 16px;
    border-radius: 6px;
    font-size: 15px;
    line-height: 1.9;
}

#stvc-result.stvc-loading,
#stvc-result.stvc-error,
#stvc-result.stvc-success {
    display: block;
}

#stvc-result.stvc-loading {
    border: 1px solid #d7b56d;
    background: #fff8e6;
    color: #7a4f01;
}

#stvc-result.stvc-error {
    border: 1px solid #dc2626;
    background: #fef2f2;
    color: #991b1b;
}

#stvc-result.stvc-success {
    border: 1px solid #16a34a;
    background: #f0fdf4;
    color: #14532d;
}

.stvc-result-box {
    display: grid;
    gap: 8px;
}

.stvc-result-box div {
    padding: 6px 0;
    border-bottom: 1px solid rgba(20, 83, 45, 0.14);
}

.stvc-result-box div:last-child {
    border-bottom: 0;
}

.stvc-total {
    margin-top: 6px;
    padding-top: 10px !important;
    font-size: 17px;
    font-weight: 800;
    color: #052e16;
    border-top: 2px solid rgba(20, 83, 45, 0.25);
}

.stvc-error {
    color: #991b1b;
}

.stvc-success {
    color: #14532d;
}

@media (max-width: 768px) {
    #stvc-calculator-form {
        padding: 16px;
    }

    .stvc-form-row {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-bottom: 12px;
    }

    .stvc-checkbox-group {
        min-height: auto;
        align-items: center;
    }

    .stvc-form-actions {
        justify-content: stretch;
    }

    .stvc-submit-button,
    #stvc-calculator-form button[type="submit"] {
        width: 100%;
    }
}