.gpc-calculator {
    max-width: var(--gpc-max-width, 760px);
    margin: 0 auto;
    padding: var(--gpc-padding, 24px);
    border: 1px solid var(--gpc-border-color, #ddd);
    border-radius: var(--gpc-border-radius, 16px);
    background: var(--gpc-background, #fff);
    color: var(--gpc-text-color, #222);
}

.gpc-step h3 {
    margin-bottom: 20px;
    font-size: 1.4rem;
    color: var(--gpc-title-color, #111);
}

.gpc-options,
.gpc-contact-fields {
    display: grid;
    gap: 12px;
}

.gpc-option {
    display: block;
    padding: 14px 16px;
    border: 1px solid var(--gpc-option-border, #ddd);
    border-radius: 12px;
    cursor: pointer;
    transition:
        background-color 0.2s ease,
        border-color 0.2s ease,
        transform 0.15s ease,
        box-shadow 0.2s ease;
}

.gpc-option:has(input:checked) {
    border-color: var(--gpc-progress-color, #6d28d9);
    box-shadow: 0 0 0 3px rgba(109, 40, 217, 0.12);
}

.gpc-option:hover {
    background: var(--gpc-option-hover, #f7f7f7);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.gpc-field-wrap label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
}

.gpc-field-wrap input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 10px;
    box-sizing: border-box;
}

.gpc-navigation {
    margin-top: 24px;
    display: flex;
    justify-content: space-between;
    gap: 12px;
}

.gpc-btn {
    padding: 12px 18px;
    border: 0;
    border-radius: 10px;
    cursor: pointer;
    background: var(--gpc-button-bg, #222);
    color: var(--gpc-button-text, #fff);
}

.gpc-result {
    margin-top: 20px;
}

.gpc-summary {
    display: grid;
    gap: 16px;
}

.gpc-summary-box {
    border: 1px solid #e5e5e5;
    border-radius: 12px;
    padding: 16px;
    background: #fafafa;
}

.gpc-summary-box h4 {
    margin-top: 0;
    margin-bottom: 12px;
}

.gpc-summary-table {
    display: grid;
    gap: 8px;
}

.gpc-summary-row {
    display: grid;
    grid-template-columns: 1.4fr 1.2fr 0.8fr;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid #ececec;
}

.gpc-summary-row--head {
    font-weight: 700;
    border-bottom: 2px solid #dcdcdc;
}

.gpc-summary-total {
    font-size: 1.1rem;
}

.gpc-pdf-form {
    margin-top: 16px;
}

.gpc-progress {
    margin-top: 20px;
}

.gpc-progress-bar {
    height: 10px;
    background: var(--gpc-progress-bg, #e5e7eb);
    border-radius: 999px;
    overflow: hidden;
}

.gpc-progress-fill {
    height: 100%;
    width: 0;
    background: var(--gpc-progress-color, #6d28d9);
    transition: width 0.35s ease-in-out;
}

.gpc-step {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.gpc-step.is-changing {
    opacity: 0;
    transform: translateY(8px);
}

@media (max-width: 700px) {
    .gpc-summary-row {
        grid-template-columns: 1fr;
        gap: 4px;
    }
}