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

body {
    font-family: Verdana, Geneva, sans-serif;
    font-weight: 500;
    font-style: normal;
    background-color: #f5f5f0;
    color: #1D1D1B;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.calculator-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    background-color: #fafaf7;
}

.main-title {
    font-size: 1.75rem;
    color: #1D1D1B;
    margin-bottom: 30px;
    text-align: center;
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* Step Container */
.step {
    display: none;
    background-color: #ffffff;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 20px;
}

.step.active {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Step Header */
.step-header {
    margin-bottom: 30px;
}

.step-number {
    font-size: 0.9rem;
    color: #888;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.step-title {
    font-size: 1.4rem;
    color: #1D1D1B;
    font-weight: 700;
    display: block;
    margin-top: 8px;
    letter-spacing: -0.01em;
}

/* Step 1: Slider */
.value-display {
    font-size: 3rem;
    color: #F8AB00;
    font-weight: 700;
    text-align: center;
    margin: 30px 0;
    letter-spacing: -0.02em;
}

.slider-container {
    margin: 30px 0;
}

.slider-label {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 15px;
    color: #1D1D1B;
}

.slider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: linear-gradient(to right, #F8AB00 0%, #F8AB00 0%, #d4d4d0 0%, #d4d4d0 100%);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #F8AB00;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(248, 171, 0, 0.4);
    transition: all 0.2s ease;
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 3px 12px rgba(248, 171, 0, 0.6);
}

.slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #F8AB00;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(248, 171, 0, 0.4);
    transition: all 0.2s ease;
}

.slider::-moz-range-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 3px 12px rgba(248, 171, 0, 0.6);
}

.slider-info {
    margin-top: 15px;
    font-size: 0.9rem;
    color: #666;
    font-style: italic;
}

/* Step 2: Material Selection */
.material-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.material-card {
    border: 3px solid #e0e0dc;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: #fafaf7;
}

.material-card:hover {
    border-color: #F8AB00;
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(248, 171, 0, 0.2);
}

.material-card.selected {
    border-color: #F8AB00;
    border-width: 4px;
    box-shadow: 0 8px 20px rgba(248, 171, 0, 0.3);
}

.material-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.material-name {
    padding: 18px;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 700;
    color: #1D1D1B;
    background-color: #ffffff;
    letter-spacing: -0.01em;
}

/* Tiilikatto sub-options */
.tiilikatto-options {
    display: none;
    margin-top: 30px;
    padding: 25px;
    background-color: #fafaf7;
    border-radius: 12px;
    border: 2px solid #e0e0dc;
}

.tiilikatto-options.visible {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

.sub-options-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1D1D1B;
    margin-bottom: 20px;
}

.radio-option {
    display: flex;
    align-items: center;
    padding: 15px;
    margin-bottom: 10px;
    background-color: #ffffff;
    border: 2px solid #e0e0dc;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.radio-option:hover {
    border-color: #F8AB00;
    background-color: #fffbf0;
}

.radio-option:has(input:checked) {
    border-color: #F8AB00;
    background-color: #fffbf0;
    border-width: 3px;
}

.radio-option input[type="radio"] {
    width: 20px;
    height: 20px;
    margin-right: 15px;
    accent-color: #F8AB00;
    cursor: pointer;
}

.radio-label {
    font-size: 1rem;
    color: #1D1D1B;
    font-weight: 500;
}

/* Step buttons container */
.step-buttons {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.step-buttons .btn-next {
    flex: 1;
}

.step-buttons .btn-back {
    flex: 0 0 auto;
}

.btn-next:disabled {
    background-color: #d4d4d0;
    cursor: not-allowed;
    box-shadow: none;
}

.btn-next:disabled:hover {
    transform: none;
    background-color: #d4d4d0;
}

/* Step 3: Steepness Selection */
.steepness-info {
    margin-bottom: 30px;
    font-size: 1rem;
    color: #666;
    font-style: italic;
}

.steepness-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 30px 0;
}

.steepness-card {
    border: 3px solid #e0e0dc;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: #fafaf7;
}

.steepness-card:hover {
    border-color: #F8AB00;
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(248, 171, 0, 0.2);
}

.steepness-card.selected {
    border-color: #F8AB00;
    border-width: 4px;
    box-shadow: 0 8px 20px rgba(248, 171, 0, 0.3);
}

.steepness-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
}

.steepness-name {
    padding: 18px;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 700;
    color: #1D1D1B;
    background-color: #ffffff;
    letter-spacing: -0.01em;
}

/* Work Type Selection (unused but kept for compatibility) */
.work-type-info {
    margin-bottom: 30px;
    font-size: 1rem;
    color: #666;
    font-style: italic;
}

.work-type-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.work-type-card {
    border: 3px solid #e0e0dc;
    border-radius: 12px;
    padding: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: #fafaf7;
    text-align: center;
}

.work-type-card:hover {
    border-color: #F8AB00;
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(248, 171, 0, 0.2);
}

.work-type-card.selected {
    border-color: #F8AB00;
    border-width: 4px;
    box-shadow: 0 8px 20px rgba(248, 171, 0, 0.3);
    background-color: #fff;
}

.work-type-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.work-type-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1D1D1B;
    margin-bottom: 10px;
}

.work-type-desc {
    font-size: 0.9rem;
    color: #666;
    line-height: 1.5;
}

/* Step 5: Results */
.results-summary {
    background-color: #fafaf7;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
}

.results-info {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e0e0dc;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    font-size: 1rem;
}

.info-label {
    color: #666;
    font-weight: 500;
}

.info-value {
    color: #1D1D1B;
    font-weight: 600;
}

.price-display {
    text-align: center;
    padding: 30px 0;
    border-bottom: 2px solid #e0e0dc;
    margin-bottom: 20px;
}

.price-label {
    font-size: 1rem;
    color: #666;
    margin-bottom: 10px;
}

.price-value {
    font-size: 2.75rem;
    font-weight: 700;
    color: #F8AB00;
    letter-spacing: -0.02em;
}

.price-breakdown {
    padding-top: 10px;
}

.breakdown-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: #1D1D1B;
    margin-bottom: 15px;
}

.breakdown-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    font-size: 0.9rem;
    color: #666;
}

/* Expert notice */
.expert-notice {
    display: none;
    background-color: #fff3e0;
    border: 2px solid #F8AB00;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
    text-align: center;
}

.expert-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.expert-notice p {
    color: #1D1D1B;
    margin: 0 0 10px 0;
    line-height: 1.6;
}

.expert-notice p:last-child {
    margin-bottom: 0;
}

.results-message {
    background-color: #e8f5e9;
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    margin-bottom: 20px;
}

.results-message p {
    color: #2e7d32;
    font-weight: 500;
    margin: 0;
}

/* Step 4: Contact Form */
.form-intro {
    margin-bottom: 30px;
    font-size: 1rem;
    color: #1D1D1B;
    line-height: 1.6;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    color: #1D1D1B;
}

.form-group input {
    padding: 12px 16px;
    border: 2px solid #e0e0dc;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    font-weight: 500;
    transition: border-color 0.3s ease;
    background-color: #fafaf7;
}

.form-group input:focus {
    outline: none;
    border-color: #F8AB00;
    background-color: #ffffff;
}

.form-group input.invalid {
    border-color: #dc3545;
    background-color: #fff5f5;
}

.form-group input.invalid:focus {
    border-color: #dc3545;
}

.error-message {
    color: #dc3545;
    font-size: 0.85rem;
    margin-top: 5px;
    font-weight: 500;
}

.form-checkbox {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin: 10px 0;
}

.form-checkbox > div:first-child {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.form-checkbox input[type="checkbox"] {
    margin-top: 4px;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #F8AB00;
    flex-shrink: 0;
}

.form-checkbox input[type="checkbox"].invalid {
    outline: 2px solid #dc3545;
    outline-offset: 2px;
}

.form-checkbox label {
    font-size: 0.95rem;
    color: #1D1D1B;
    cursor: pointer;
}

.privacy-link {
    color: #F8AB00;
    text-decoration: underline;
}

.privacy-link:hover {
    color: #d99400;
}

/* Buttons */
.btn-next,
.btn-submit {
    background-color: #F8AB00;
    color: #1D1D1B;
    border: none;
    padding: 16px 40px;
    font-size: 1rem;
    font-family: inherit;
    font-weight: 700;
    letter-spacing: 0.02em;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 20px;
    width: 100%;
    box-shadow: 0 4px 12px rgba(248, 171, 0, 0.3);
}

.btn-next:hover,
.btn-submit:hover {
    background-color: #d99400;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(248, 171, 0, 0.4);
}

.btn-back {
    background-color: #d4d4d0;
    color: #1D1D1B;
    border: none;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-family: inherit;
    font-weight: 600;
    letter-spacing: 0.01em;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.btn-back:hover {
    background-color: #c4c4c0;
    transform: translateY(-2px);
}

.form-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 10px;
}

.form-buttons .btn-back,
.form-buttons .btn-submit {
    margin-top: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .calculator-container {
        padding: 15px;
    }

    .main-title {
        font-size: 1.5rem;
        margin-bottom: 20px;
    }

    .step {
        padding: 25px 20px;
    }

    .step-title {
        font-size: 1.2rem;
    }

    .value-display {
        font-size: 2.5rem;
    }

    .material-options,
    .steepness-options {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .form-buttons {
        grid-template-columns: 1fr;
    }

    .step-buttons {
        flex-direction: column-reverse;
    }

    .step-buttons .btn-back,
    .step-buttons .btn-next {
        width: 100%;
    }

    .price-value {
        font-size: 2.5rem;
    }

    .btn-next,
    .btn-submit {
        padding: 14px 32px;
        font-size: 1rem;
    }

    .tiilikatto-options {
        padding: 20px;
    }

    .radio-option {
        padding: 12px;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 1.3rem;
    }

    .step {
        padding: 20px 15px;
    }

    .value-display {
        font-size: 2rem;
    }

    .material-card img {
        height: 150px;
    }

    .price-value {
        font-size: 2rem;
    }

    .results-summary {
        padding: 20px;
    }

    .radio-label {
        font-size: 0.9rem;
    }

    .expert-notice {
        padding: 20px;
    }
}