:root {
            --primary: #FF6B35;
            --primary-light: #FF9A6B;
            --primary-dark: #E55A2B;
            --secondary: #2D3047;
            --accent: #00A8A8;
            --light: #F8F9FA;
            --gray: #6C757D;
            --gray-light: #E9ECEF;
            --shadow: 0 10px 30px rgba(255, 107, 53, 0.15);
            --shadow-heavy: 0 15px 40px rgba(255, 107, 53, 0.25);
            --radius: 16px;
            --radius-sm: 10px;
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
            background: linear-gradient(135deg, #FFF8F5 0%, #FFFAF8 100%);
            color: var(--secondary);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
            padding: 20px;
        }
        
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
        }
        
        .project-estimate-section {
            background: white;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            padding: 60px 40px;
            margin: 40px auto;
            position: relative;
            border: 1px solid rgba(255, 107, 53, 0.1);
        }
        
        .decorative-circle {
            position: absolute;
            border-radius: 50%;
            z-index: 0;
        }
        
        .circle-1 {
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 107, 53, 0.05) 0%, rgba(255, 107, 53, 0) 70%);
            top: -150px;
            right: -150px;
        }
        
        .circle-2 {
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(45, 48, 71, 0.03) 0%, rgba(45, 48, 71, 0) 70%);
            bottom: -100px;
            left: -100px;
        }
        
        .section-header {
            display: flex;
            align-items: center;
            margin-bottom: 60px;
            position: relative;
            z-index: 1;
        }
        
        .step-badge {
            display: flex;
            align-items: center;
            gap: 20px;
            background: rgba(255, 107, 53, 0.08);
            padding: 12px 24px;
            border-radius: 50px;
            width: fit-content;
        }
        
        .step-number {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            box-shadow: 0 5px 15px rgba(255, 107, 53, 0.3);
        }
        
        .step-divider {
            width: 40px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary) 0%, rgba(255, 107, 53, 0.2) 100%);
        }
        
        .step-label {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--primary);
            letter-spacing: 1px;
            text-transform: uppercase;
        }
        
        .section-title {
            font-weight: 800;
            font-size: 3.2rem;
            line-height: 1.1;
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            max-width: 700px;
        }
        
        .section-subtitle {
            font-size: 1.2rem;
            color: var(--gray);
            max-width: 500px;
            line-height: 1.7;
        }
        
        .form-container {
            position: relative;
            z-index: 1;
        }
        
        .form-section-title {
            font-weight: 700;
            font-size: 1.4rem;
            margin-bottom: 25px;
            color: var(--secondary);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .form-section-title::before {
            content: '';
            width: 8px;
            height: 8px;
            background: var(--primary);
            border-radius: 50%;
            display: inline-block;
        }
        
        .project-type-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 20px;
            margin-bottom: 40px;
        }
        
        .project-type-card {
            background: var(--light);
            border: 2px solid var(--gray-light);
            border-radius: var(--radius-sm);
            padding: 25px 20px;
            text-align: center;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        
        .project-type-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary-light);
            box-shadow: var(--shadow);
        }
        
        .project-type-card.active {
            border-color: var(--primary);
            background: linear-gradient(135deg, rgba(255, 107, 53, 0.05) 0%, rgba(255, 107, 53, 0.02) 100%);
            box-shadow: var(--shadow);
        }
        
        .project-type-card.active::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
        }
        
        .project-type-icon {
            font-size: 2.5rem;
            margin-bottom: 15px;
            color: var(--primary);
            transition: var(--transition);
        }
        
        .project-type-card.active .project-type-icon {
            transform: scale(1.1);
        }
        
        .project-type-name {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--secondary);
        }
        
        .project-type-desc {
            font-size: 0.9rem;
            color: var(--gray);
            line-height: 1.5;
        }
        
        .slider-container {
            background: var(--light);
            border-radius: var(--radius-sm);
            padding: 25px;
            margin-bottom: 30px;
            border: 1px solid rgba(255, 107, 53, 0.1);
        }
        
        .slider-label {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 15px;
        }
        
        .slider-title {
            font-weight: 600;
            color: var(--secondary);
        }
        
        .slider-value {
            font-weight: 700;
            color: var(--primary);
            font-size: 1.2rem;
        }
        
        .custom-slider {
            -webkit-appearance: none;
            width: 100%;
            height: 8px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary-light) 0%, var(--primary) 100%);
            outline: none;
            opacity: 0.9;
            transition: opacity 0.2s;
        }
        
        .custom-slider:hover {
            opacity: 1;
        }
        
        .custom-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: white;
            border: 3px solid var(--primary);
            cursor: pointer;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
            transition: var(--transition);
        }
        
        .custom-slider::-webkit-slider-thumb:hover {
            transform: scale(1.2);
            box-shadow: 0 5px 15px rgba(255, 107, 53, 0.4);
        }
        
        .slider-scale {
            display: flex;
            justify-content: space-between;
            margin-top: 10px;
            font-size: 0.85rem;
            color: var(--gray);
        }
        
        /* Чекбокси */
        .checkbox-group {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 15px;
            margin-bottom: 40px;
        }
        
        .custom-checkbox {
            position: relative;
            padding-left: 40px;
            cursor: pointer;
            user-select: none;
        }
        
        .custom-checkbox input {
            position: absolute;
            opacity: 0;
            cursor: pointer;
            height: 0;
            width: 0;
        }
        
        .checkmark {
            position: absolute;
            top: 0;
            left: 0;
            height: 24px;
            width: 24px;
            background-color: var(--light);
            border: 2px solid var(--gray-light);
            border-radius: 6px;
            transition: var(--transition);
        }
        
        .custom-checkbox:hover input ~ .checkmark {
            border-color: var(--primary-light);
        }
        
        .custom-checkbox input:checked ~ .checkmark {
            background-color: var(--primary);
            border-color: var(--primary);
        }
        
        .checkmark:after {
            content: "";
            position: absolute;
            display: none;
        }
        
        .custom-checkbox input:checked ~ .checkmark:after {
            display: block;
        }
        
        .custom-checkbox .checkmark:after {
            left: 8px;
            top: 4px;
            width: 6px;
            height: 10px;
            border: solid white;
            border-width: 0 2px 2px 0;
            transform: rotate(45deg);
        }
        
        .checkbox-label {
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 5px;
            display: block;
        }
        
        .checkbox-description {
            font-size: 0.9rem;
            color: var(--gray);
            line-height: 1.5;
        }
        
        .contact-form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 25px;
            margin-bottom: 40px;
        }
        
        .form-group {
            position: relative;
        }
        
        .form-control-modern {
            width: 100%;
            padding: 18px 0 10px 0;
            font-size: 1rem;
            background: transparent;
            border: none;
            border-bottom: 2px solid var(--gray-light);
            color: var(--secondary);
            transition: var(--transition);
        }
        
        .form-control-modern:focus {
            outline: none;
            border-bottom-color: var(--primary);
        }
        
        .form-label {
            position: absolute;
            top: 18px;
            left: 0;
            font-size: 1rem;
            color: var(--gray);
            transition: var(--transition);
            pointer-events: none;
        }
        
        .form-control-modern:focus + .form-label,
        .form-control-modern:not(:placeholder-shown) + .form-label {
            top: 0;
            font-size: 0.85rem;
            color: var(--primary);
        }
        
        .textarea-group {
            grid-column: 1 / -1;
        }
        
        textarea.form-control-modern {
            min-height: 120px;
            resize: vertical;
            padding-top: 25px;
        }
        
        .submit-btn {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: white;
            border: none;
            padding: 20px 40px;
            font-weight: 700;
            font-size: 1.1rem;
            border-radius: 50px;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 15px;
            width: 100%;
            box-shadow: var(--shadow);
            margin-top: 20px;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }
        
        .submit-btn:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-heavy);
        }
        
        .submit-btn:active {
            transform: translateY(-2px);
        }
        
        .submit-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: 0.5s;
            z-index: -1;
        }
        
        .submit-btn:hover::before {
            left: 100%;
        }
        
        .btn-icon {
            transition: var(--transition);
        }
        
        .submit-btn:hover .btn-icon {
            transform: rotate(45deg) scale(1.2);
        }
        
        .results-container {
            background: linear-gradient(135deg, rgba(255, 107, 53, 0.05) 0%, rgba(45, 48, 71, 0.02) 100%);
            border-radius: var(--radius);
            padding: 40px;
            margin-top: 50px;
            border: 1px solid rgba(255, 107, 53, 0.1);
            display: none;
            animation: fadeIn 0.8s ease;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .results-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 2px solid rgba(255, 107, 53, 0.1);
        }
        
        .results-title {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--secondary);
        }
        
        .results-badge {
            background: linear-gradient(135deg, var(--accent) 0%, #008B8B 100%);
            color: white;
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
        }
        
        .results-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        
        .result-item {
            background: white;
            border-radius: var(--radius-sm);
            padding: 25px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }
        
        .result-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .result-label {
            font-size: 0.9rem;
            color: var(--gray);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .result-value {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary);
            line-height: 1.2;
        }
        
        .result-value.price {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .result-note {
            background: white;
            border-left: 4px solid var(--accent);
            padding: 20px;
            border-radius: var(--radius-sm);
            margin-top: 20px;
            font-size: 0.95rem;
            line-height: 1.6;
        }
        
        .result-note strong {
            color: var(--secondary);
        }
        
        @media (max-width: 992px) {
            .section-title {
                font-size: 2.5rem;
            }
            
            .project-estimate-section {
                padding: 40px 25px;
            }
            
            .project-type-grid {
                grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            }
        }
        
        @media (max-width: 768px) {
            .section-title {
                font-size: 2rem;
            }
            
            .section-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 25px;
            }
            
            .project-type-grid {
                grid-template-columns: 1fr;
            }
            
            .checkbox-group {
                grid-template-columns: 1fr;
            }
            
            .results-grid {
                grid-template-columns: 1fr;
            }
            
            .contact-form-grid {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 576px) {
            body {
                padding: 10px;
            }
            
            .project-estimate-section {
                padding: 30px 20px;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
            
            .step-badge {
                padding: 10px 20px;
            }
        }