* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }


    .container {
        max-width: 56rem;
        margin: 0 auto;
    }

    .card {
        background: white;
        border-radius: 0.75rem;
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        padding: 1.25rem;
    }

    @media (min-width: 768px) {
        .card {
            padding: 1.5rem;
        }
    }

    .header {
        text-align: center;
        margin-bottom: 0.75rem;
    }

    .header h2 {
        font-size: 1.25rem;
        font-weight: bold;
        color: #1f2937;
        margin-bottom: 0.125rem;
    }

    @media (min-width: 768px) {
        .header h2 {
            font-size: 1.5rem;
        }
    }

    .header p {
        font-size: 0.75rem;
        color: #4b5563;
    }

    .progress-container {
        margin-bottom: 1rem;
    }

    .progress-bar {
        height: 0.375rem;
        background: #e5e7eb;
        border-radius: 9999px;
        overflow: hidden;
    }

    .progress-fill {
        height: 100%;
        background: linear-gradient(to right, #fb923c, #ea580c);
        transition: width 0.5s ease-out;
    }

    .progress-text {
        font-size: 0.75rem;
        color: #6b7280;
        margin-top: 0.25rem;
        text-align: center;
    }

    .slide-header {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        margin-bottom: 0.75rem;
        padding-bottom: 0.5rem;
        border-bottom: 1px solid #fed7aa;
    }

    .slide-header svg {
        width: 1.5rem;
        height: 1.5rem;
        color: #f97316;
    }

    .slide-header h3 {
        font-size: 1.125rem;
        font-weight: bold;
        color: #1f2937;
    }

    .questions {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .question {
        display: flex;
        flex-direction: column;
    }

    .question label {
        display: block;
        font-size: 0.875rem;
        font-weight: 600;
        color: #374151;
        margin-bottom: 0.5rem;
    }

    .input-wrapper {
        position: relative;
    }

    .input-wrapper input {
        width: 100%;
        padding: 0.625rem 2.5rem 0.625rem 0.625rem;
        border: 2px solid #e5e7eb;
        border-radius: 0.5rem;
        font-size: 1rem;
        transition: border-color 0.2s;
    }

    .input-wrapper input:focus {
        outline: none;
        border-color: #f97316;
    }

    .input-unit {
        position: absolute;
        right: 0.75rem;
        top: 50%;
        transform: translateY(-50%);
        color: #6b7280;
        font-size: 0.875rem;
        font-weight: 500;
    }

    .options-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }

    @media (min-width: 768px) {
        .options-grid {
            grid-template-columns: repeat(4, 1fr);
        }
    }

    .option-btn {
        padding: 0.625rem;
        border: 2px solid #e5e7eb;
        border-radius: 0.5rem;
        background: white;
        font-size: 0.75rem;
        cursor: pointer;
        transition: all 0.2s;
    }

    .option-btn:hover {
        border-color: #fdba74;
        background: #fff7ed;
    }

    .option-btn.selected {
        border-color: #f97316;
        background: #fff7ed;
        font-weight: 600;
    }

    .navigation {
        display: flex;
        justify-content: space-between;
        margin-top: 1rem;
        padding-top: 0.75rem;
        border-top: 1px solid #f3f4f6;
    }

    .nav-btn {
        display: flex;
        align-items: center;
        gap: 0.25rem;
        padding: 0.5rem 1rem;
        border-radius: 0.5rem;
        font-weight: 600;
        font-size: 0.75rem;
        cursor: pointer;
        transition: all 0.2s;
        border: none;
    }

    .nav-btn svg {
        width: 1rem;
        height: 1rem;
    }

    .nav-btn.prev {
        background: #e5e7eb;
        color: #374151;
    }

    .nav-btn.prev:hover:not(:disabled) {
        background: #d1d5db;
    }

    .nav-btn.next {
        background: linear-gradient(to right, #f97316, #ea580c);
        color: white;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    }

    .nav-btn.next:hover:not(:disabled) {
        background: linear-gradient(to right, #ea580c, #c2410c);
    }

    .nav-btn:disabled {
        background: #f3f4f6;
        color: #9ca3af;
        cursor: not-allowed;
    }

    .results {
        display: flex;
        flex-direction: column;
    }

    .results-header {
        text-center;
        margin-bottom: 0.75rem;
    }

    .results-icon {
        display: inline-block;
        padding: 0.5rem;
        background: #fed7aa;
        border-radius: 9999px;
        margin-bottom: 0.5rem;
    }

    .results-icon svg {
        width: 2rem;
        height: 2rem;
        color: #f97316;
    }

    .results-header h3 {
        font-size: 1.125rem;
        font-weight: bold;
        color: #1f2937;
    }

    .price-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 0.5rem;
        margin-bottom: 0.75rem;
    }

    @media (min-width: 768px) {
        .price-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }

    .price-card {
        border-radius: 0.5rem;
        padding: 0.75rem;
        text-align: center;
        color: white;
    }

    .price-card.per-m2 {
        background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    }

    .price-card.total {
        background: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);
    }

    .price-card p:first-child {
        font-size: 0.75rem;
        opacity: 0.9;
        margin-bottom: 0.125rem;
    }

    .price-card .price {
        font-size: 1.5rem;
        font-weight: bold;
    }

    .price-card p:last-child {
        font-size: 0.75rem;
        opacity: 0.75;
    }

    .recap {
        background: #fff7ed;
        border-radius: 0.5rem;
        padding: 0.625rem;
        margin-bottom: 0.75rem;
    }

    .recap h4 {
        font-weight: bold;
        color: #1f2937;
        margin-bottom: 0.5rem;
        font-size: 0.75rem;
        display: flex;
        align-items: center;
        gap: 0.25rem;
    }

    .recap-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 0.25rem;
        font-size: 0.75rem;
    }

    @media (min-width: 768px) {
        .recap-grid {
            grid-template-columns: repeat(2, 1fr);
            column-gap: 0.75rem;
        }
    }

    .recap-item {
        display: flex;
    }

    .recap-item .label {
        color: #4b5563;
    }

    .recap-item .value {
        font-weight: 600;
        color: #1f2937;
        margin-left: 0.25rem;
    }

    .recap-item.full-width {
        grid-column: 1 / -1;
    }

    .restart-btn-container {
        display: flex;
        justify-content: center;
    }

    .restart-btn {
        background: #e5e7eb;
        color: #374151;
        padding: 0.5rem 1rem;
        border-radius: 0.5rem;
        font-weight: 600;
        font-size: 0.75rem;
        cursor: pointer;
        border: none;
        transition: background 0.2s;
    }

    .restart-btn:hover {
        background: #d1d5db;
    }

    .footer {
        text-align: center;
        font-size: 0.75rem;
        color: #6b7280;
        margin-top: 1rem;
        padding-top: 0.75rem;
        border-top: 1px solid #f3f4f6;
    }

    .hidden {
        display: none;
    }