:root {
        --primary: #4a6baf;
        --primary-light: #3a5599;
        --primary-dark: #3a5599;
        --secondary: #65676B;
        --accent: #42B883;
        --light: #FFFFFF;
        --gray: #F0F2F5;
        --text: #3a5599;
        --border: #DDDFE2;
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    body {
        background: var(--gray);
        color: var(--text);
        line-height: 1.6;
    }

    header {
        background: var(--light);
        padding: 1rem 5%;
        position: fixed;
        width: 100%;
        top: 0;
        z-index: 1000;
        box-shadow: 0 2px 15px rgba(0,0,0,0.1);
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-bottom: 1px solid var(--border);
    }

    .logo {
        font-size: 2rem;
        font-weight: bold;
        color: var(--primary);
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

    .logo i {
        font-size: 2.2rem;
    }

    .header-controls {
        display: flex;
        align-items: center;
        gap: 1.5rem;
    }

    .language-dropdown {
        position: relative;
        display: inline-block;
    }

    .language-dropdown-btn {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        background: var(--primary);
        padding: 0.7rem 1.2rem;
        border-radius: 6px;
        cursor: pointer;
        transition: all 0.3s ease;
        border: 1px solid var(--border);
        font-weight: 600;
        font-size: 1rem;
        color: #fff;
    }

    .language-dropdown-btn:hover {
        background: var(--primary-dark);
    }

    .flag {
        width: 20px;
        height: 15px;
        border-radius: 2px;
        background: linear-gradient(180deg, #9E3039 0%, #9E3039 33%, #FFFFFF 33%, #FFFFFF 66%, #9E3039 66%, #9E3039 100%);
    }

    .flag.ru {
        background: linear-gradient(180deg, #FFFFFF 0%, #FFFFFF 33%, #0039A6 33%, #0039A6 66%, #D52B1E 66%, #D52B1E 100%);
    }

    .language-dropdown-content {
        display: none;
        position: absolute;
        top: 100%;
        right: 0;
        background: var(--light);
        min-width: 140px;
        box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        border-radius: 12px;
        border: 1px solid var(--border);
        z-index: 1001;
        margin-top: 0.5rem;
    }

    .language-dropdown-content.show {
        display: block;
    }

    .language-option {
        display: flex;
        align-items: center;
        gap: 0.8rem;
        padding: 1rem 1.2rem;
        cursor: pointer;
        transition: background 0.2s ease;
    }

    .language-option:hover {
        background: var(--gray);
    }

    .language-option:first-child {
        border-radius: 12px 12px 0 0;
    }

    .language-option:last-child {
        border-radius: 0 0 12px 12px;
    }

    .cta-button {
        background: var(--primary);
        color: white;
        padding: 0.8rem 1.8rem;
        border: none;
        border-radius: 6px;
        cursor: pointer;
        font-weight: 600;
        font-size: 1rem;
        transition: all 0.3s ease;
    }

    .cta-button:hover {
        background: var(--primary-dark);
    }

    section {
        padding: 6rem 5%;
        margin: 2rem auto;
        max-width: 1400px;
    }

    .hero {
        margin-top: 100px;
    }

    .hero-title {
        text-align: center;
        margin-bottom: 3rem;
    }

    .hero-title h1 {
        font-size: 3rem;
        font-weight: 700;
        color: var(--text);
        line-height: 1.2;
    }

    .hero-block {
        background: var(--light);
        border-radius: 20px;
        padding: 3rem;
        box-shadow: 0 10px 40px rgba(0,0,0,0.1);
        border: 1px solid var(--border);
        display: grid;
        grid-template-columns: 1.2fr 0.8fr;
        gap: 4rem;
        align-items: center;
    }

    .hero-content h2 {
        font-size: 1.9rem;
        color: var(--secondary);
        margin-bottom: 2rem;
        font-weight: 500;
    }

    .gradient-bg {
        background: linear-gradient(135deg, var(--primary-light), var(--primary));
        color: white;
        border-radius: 12px;
    }

    .dark-bg {
        background: var(--text);
        color: white;
        border-radius: 12px;
    }

    .features {
        padding: 0rem 5%;
    }

    .calculator {
        width: 100%;
    }

    .amount-display {
        text-align: center;
        font-size: 3.5rem;
        font-weight: 700;
        color: var(--primary);
        margin: 1rem 0;
    }

    .monthly-payment {
        text-align: center;
        font-size: 1.5rem;
        color: var(--secondary);
        margin-bottom: 2rem;
    }

    .slider-container {
        margin: 2.5rem 0;
    }

    .slider-label {
        display: flex;
        justify-content: space-between;
        margin-bottom: 0.5rem;
        font-weight: 600;
        color: var(--text);
    }

    .slider {
        width: 100%;
        height: 8px;
        border-radius: 4px;
        background: var(--border);
        outline: none;
        margin: 1.5rem 0;
        -webkit-appearance: none;
    }

    .slider::-webkit-slider-thumb {
        -webkit-appearance: none;
        width: 24px;
        height: 24px;
        border-radius: 50%;
        background: var(--primary);
        cursor: pointer;
        border: 3px solid var(--light);
        box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    }

    .slider-values {
        display: flex;
        justify-content: space-between;
        margin-top: 1rem;
        color: var(--secondary);
        font-weight: 500;
    }

    .calculator-button {
        background: var(--primary);
        color: white;
        padding: 1.2rem 2rem;
        border: none;
        border-radius: 8px;
        cursor: pointer;
        font-weight: 600;
        font-size: 1.2rem;
        width: 100%;
        transition: all 0.3s ease;
        margin-top: 1rem;
    }

    .calculator-button:hover {
        background: var(--primary-dark);
        transform: translateY(-2px);
        box-shadow: 0 4px 15px rgba(24, 119, 242, 0.3);
    }

    .legal-note {
        text-align: center;
        font-size: 0.9rem;
        color: var(--secondary);
        margin-top: 1.5rem;
        line-height: 1.4;
    }

    .hero-image {
        text-align: center;
        padding: 1rem;
    }

    .hero-image img {
        max-width: 100%;
        height: auto;
    }

    .features-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 2rem;
        margin: 3rem 0;
    }

    .feature-card {
        background: var(--light);
        padding: 2rem;
        border-radius: 12px;
        text-align: center;
        box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        transition: all 0.3s ease;
        border: 1px solid var(--border);
    }

    .feature-card:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 15px rgba(0,0,0,0.12);
    }

    .feature-icon {
        font-size: 2.5rem;
        margin-bottom: 1rem;
        color: var(--primary);
    }

    .steps {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 2rem;
        margin: 2.5rem 0;
    }

    .step {
        text-align: center;
        padding: 1.5rem;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 12px;
    }

    .step-number {
        background: var(--accent);
        color: white;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 1rem;
        font-weight: 600;
        font-size: 1.1rem;
    }

    footer {
        background: var(--light);
        color: var(--text);
        padding: 3rem 5%;
        border-top: 1px solid var(--border);
    }

    .footer-content {
        max-width: 1200px;
        margin: 0 auto;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 2.5rem;
    }

    .legal-text {
        font-size: 0.85rem;
        color: var(--secondary);
        margin: 1rem 0;
        line-height: 1.5;
    }

    .disclaimer {
        background: var(--gray);
        padding: 2rem;
        border-radius: 8px;
        margin-top: 2rem;
        grid-column: 1 / -1;
    }

    @media (max-width: 1024px) {
        .hero-block {
            grid-template-columns: 1fr;
            gap: 3rem;
            text-align: center;
        }
        
        .hero-title h1 {
            font-size: 2.5rem;
        }
        
        .hero-content h2 {
            font-size: 1.8rem;
        }
        .hero-image {
            display: none;
        }
    }

    @media (max-width: 768px) {
        header {
            padding: 1rem;
            flex-direction: column;
            gap: 1rem;
        }

        section {
            padding: 4rem 2rem;
            margin: 1rem;
        }

        .hero {
            margin-top: 140px;
        }

        .hero-block {
            padding: 2rem;
        }

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

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

        .amount-display {
            font-size: 2.8rem;
        }
    }

    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(30px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .animate {
        animation: fadeInUp 0.6s ease-out;
    }

    .hidden-inputs {
        display: none;
    }