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

    body {
        font-family: 'Poppins', sans-serif;
        background-color: #000000;
        color: #E0E0E0;
    }

    html {
        scroll-behavior: smooth;
        height: 100%;
    }

    body {
        min-height: 100vh;
        display: flex;
        flex-direction: column;
    }

    /* Calculator Section */
    .calculator-section {
        background: #000000;
        padding: 2rem 2rem;
        flex: 1;
        display: flex;
        align-items: center;
    }

    .calculator-container {
        max-width: 1000px;
        margin: 0 auto;
        position: relative;
        width: 100%;
    }

    /* Close Button */
    .close-button {
        position: fixed;
        top: 2rem;
        right: 2rem;
        width: 40px;
        height: 40px;
        background: rgba(220, 53, 69, 0.2);
        border: 2px solid rgba(220, 53, 69, 0.5);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.3s ease;
        z-index: 1000;
        text-decoration: none;
        color: #ff6b6b;
        font-size: 1.5rem;
    }

    .close-button:hover {
        background: rgba(220, 53, 69, 0.3);
        border-color: #ff6b6b;
        transform: rotate(90deg) scale(1.1);
        box-shadow: 0 10px 30px rgba(220, 53, 69, 0.4);
    }

    .calculator-card {
        background: linear-gradient(135deg, rgba(26, 26, 26, 0.6), rgba(15, 15, 15, 0.6));
        border: 1px solid rgba(30, 115, 190, 0.2);
        border-radius: 24px;
        padding: 3rem;
        position: relative;
        overflow: hidden;
    }

    .calculator-card::before {
        content: '';
        position: absolute;
        top: 0;
        right: 0;
        width: 400px;
        height: 400px;
        background: radial-gradient(circle, rgba(30, 115, 190, 0.1), transparent);
        filter: blur(80px);
        pointer-events: none;
    }

    /* Progress Bar */
    .progress-container {
        margin-bottom: 3rem;
        position: relative;
        z-index: 1;
    }

    .progress-steps {
        display: flex;
        justify-content: space-between;
        margin-bottom: 1rem;
    }

    .progress-step {
        flex: 1;
        text-align: center;
        position: relative;
    }

    .progress-step-number {
        width: 40px;
        height: 40px;
        background: rgba(30, 115, 190, 0.2);
        border: 2px solid rgba(30, 115, 190, 0.3);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 0.5rem;
        color: #B0B0B0;
        font-weight: 600;
        transition: all 0.3s ease;
    }

    .progress-step.active .progress-step-number {
        background: linear-gradient(135deg, #1E73BE, #00C2A0);
        border-color: transparent;
        color: #FFFFFF;
        transform: scale(1.1);
    }

    .progress-step.completed .progress-step-number {
        background: rgba(0, 194, 160, 0.2);
        border-color: #00C2A0;
        color: #00C2A0;
    }

    .progress-step-label {
        font-size: 0.85rem;
        color: #B0B0B0;
    }

    .progress-step.active .progress-step-label {
        color: #1E73BE;
        font-weight: 600;
    }

    .progress-bar {
        height: 4px;
        background: rgba(30, 115, 190, 0.2);
        border-radius: 10px;
        overflow: hidden;
        margin-bottom: 2rem;
    }

    .progress-bar-fill {
        height: 100%;
        background: linear-gradient(90deg, #1E73BE, #00C2A0);
        transition: width 0.4s ease;
        border-radius: 10px;
    }

    /* Question Container */
    .question-container {
        position: relative;
        z-index: 1;
        max-width: 900px;
        margin: 0 auto;
        width: 100%;
    }

    .question {
        display: none;
        animation: fadeIn 0.5s ease;
    }

    .question.active {
        display: block;
    }

    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .question-title {
        font-size: 1.8rem;
        font-weight: 600;
        color: #FFFFFF;
        margin-bottom: 1rem;
    }

    .question-subtitle {
        font-size: 1rem;
        color: #B0B0B0;
        margin-bottom: 2.5rem;
    }

    /* Options */
    .options-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
        margin-bottom: 2rem;
    }

    .option-card {
        background: rgba(26, 26, 26, 0.4);
        border: 2px solid rgba(30, 115, 190, 0.2);
        border-radius: 16px;
        padding: 2rem;
        cursor: pointer;
        transition: all 0.3s ease;
        text-align: center;
    }

    .option-card:hover {
        border-color: rgba(30, 115, 190, 0.5);
        transform: translateY(-5px);
        box-shadow: 0 10px 30px rgba(30, 115, 190, 0.2);
    }

    .option-card.selected {
        border-color: #1E73BE;
        background: rgba(30, 115, 190, 0.1);
    }

    .option-icon {
        font-size: 2.5rem;
        margin-bottom: 1rem;
        background: linear-gradient(135deg, #1E73BE, #00C2A0);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .option-title {
        font-size: 1.2rem;
        font-weight: 600;
        color: #FFFFFF;
        margin-bottom: 0.5rem;
    }

    .option-description {
        font-size: 0.9rem;
        color: #B0B0B0;
    }

    /* Checkbox Options */
    .checkbox-options {
        display: grid;
        gap: 1rem;
        margin-bottom: 2rem;
    }

    .checkbox-option {
        background: rgba(26, 26, 26, 0.4);
        border: 2px solid rgba(30, 115, 190, 0.2);
        border-radius: 12px;
        padding: 1.5rem;
        cursor: pointer;
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
        gap: 1rem;
    }

    .checkbox-option:hover {
        border-color: rgba(30, 115, 190, 0.5);
        background: rgba(30, 115, 190, 0.05);
    }

    .checkbox-option.selected {
        border-color: #1E73BE;
        background: rgba(30, 115, 190, 0.1);
    }

    .checkbox-option input[type="checkbox"] {
        display: none;
    }

    .checkbox-custom {
        width: 24px;
        height: 24px;
        border: 2px solid rgba(30, 115, 190, 0.3);
        border-radius: 6px;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: all 0.3s ease;
    }

    .checkbox-option.selected .checkbox-custom {
        background: linear-gradient(135deg, #1E73BE, #00C2A0);
        border-color: transparent;
    }

    .checkbox-custom i {
        color: #FFFFFF;
        font-size: 0.8rem;
        opacity: 0;
    }

    .checkbox-option.selected .checkbox-custom i {
        opacity: 1;
    }

    .checkbox-label {
        flex: 1;
    }

    .checkbox-title {
        font-weight: 600;
        color: #FFFFFF;
        margin-bottom: 0.25rem;
    }

    .checkbox-description {
        font-size: 0.85rem;
        color: #B0B0B0;
    }

    /* Input Fields */
    .input-group {
        margin-bottom: 2rem;
    }

    .input-group label {
        display: block;
        color: #E0E0E0;
        font-weight: 500;
        margin-bottom: 0.75rem;
        font-size: 1rem;
    }

    .input-group input,
    .input-group textarea {
        width: 100%;
        padding: 1rem 1.5rem;
        background: rgba(255, 255, 255, 0.05);
        border: 2px solid rgba(30, 115, 190, 0.3);
        border-radius: 12px;
        color: #FFFFFF;
        font-family: 'Poppins', sans-serif;
        font-size: 1rem;
        transition: all 0.3s ease;
    }

    .input-group input:focus,
    .input-group textarea:focus {
        outline: none;
        border-color: #1E73BE;
        background: rgba(30, 115, 190, 0.1);
    }

    .input-group textarea {
        min-height: 120px;
        resize: vertical;
    }

    /* Navigation Buttons */
    .navigation-buttons {
        display: flex;
        gap: 1rem;
        justify-content: space-between;
        margin-top: 3rem;
    }

    .btn {
        padding: 1rem 2.5rem;
        border-radius: 50px;
        font-weight: 600;
        font-size: 1rem;
        transition: all 0.3s ease;
        border: none;
        cursor: pointer;
        display: inline-flex;
        align-items: center;
        gap: 0.75rem;
        font-family: 'Poppins', sans-serif;
    }

    .btn-back {
        background: rgba(30, 115, 190, 0.1);
        color: #1E73BE;
        border: 2px solid rgba(30, 115, 190, 0.3);
    }

    .btn-back:hover {
        background: rgba(30, 115, 190, 0.2);
        transform: translateX(-5px);
    }

    .btn-next {
        background: linear-gradient(135deg, #1E73BE, #00C2A0);
        color: #FFFFFF;
        box-shadow: 0 10px 30px rgba(30, 115, 190, 0.4);
    }

    .btn-next:hover {
        transform: translateY(-3px);
        box-shadow: 0 15px 40px rgba(30, 115, 190, 0.6);
    }

    .btn-next:disabled {
        opacity: 0.5;
        cursor: not-allowed;
        transform: none;
    }

    /* Result Section */
    .result-container {
        text-align: center;
        padding: 2rem 0;
    }

    .result-price {
        font-size: 4rem;
        font-weight: 700;
        background: linear-gradient(135deg, #1E73BE, #00C2A0);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        margin-bottom: 1rem;
    }

    .result-label {
        font-size: 1.2rem;
        color: #B0B0B0;
        margin-bottom: 3rem;
    }

    .result-details {
        background: rgba(26, 26, 26, 0.4);
        border: 1px solid rgba(30, 115, 190, 0.2);
        border-radius: 16px;
        padding: 2rem;
        margin-bottom: 2rem;
        text-align: left;
    }

    .result-item {
        display: flex;
        justify-content: space-between;
        padding: 1rem 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .result-item:last-child {
        border-bottom: none;
    }

    .result-item-label {
        color: #B0B0B0;
    }

    .result-item-value {
        color: #FFFFFF;
        font-weight: 600;
    }

    .result-actions {
        display: flex;
        gap: 1rem;
        justify-content: center;
        flex-wrap: wrap;
    }

    /* Responsive */
    @media (max-width: 968px) {
        .calculator-section {
            padding: 1.5rem;
        }

        .calculator-card {
            padding: 2rem 1.5rem;
        }

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

        .progress-steps {
            flex-wrap: wrap;
        }

        .question-title {
            font-size: 1.5rem;
        }

        .result-price {
            font-size: 3rem;
        }
    }

    @media (max-width: 640px) {
        .navigation-buttons {
            flex-direction: column;
        }

        .btn {
            width: 100%;
            justify-content: center;
        }
    }