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

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --dark-bg: #0f172a;
    --light-bg: #1e293b;
    --text-light: #f1f5f9;
    --text-gray: #94a3b8;
    --accent: #f59e0b;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--dark-bg);
    color: var(--text-light);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Language switching */
.text-ru {
    display: none;
}

body[lang="ru"] .text-en {
    display: none;
}

body[lang="ru"] .text-ru {
    display: inline;
}

body[lang="ru"] .btn-text-en {
    display: none;
}

body[lang="ru"] .btn-text-ru {
    display: inline;
}

body[lang="en"] .btn-text-ru {
    display: none;
}

/* Header */
.header {
    background: var(--light-bg);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
}

.logo img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 50%;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.4);
}

.btn-hero {
    background: linear-gradient(135deg, var(--accent), #f97316);
    color: white;
    font-size: 18px;
    padding: 16px 40px;
}

.btn-hero:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(245, 158, 11, 0.4);
}

/* Hero Section */
.hero {
    padding: 100px 0;
    text-align: center;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 24px;
    color: var(--text-gray);
    margin-bottom: 40px;
}

/* How It Works */
.how-it-works {
    padding: 80px 0;
    background: var(--dark-bg);
}

.section-title {
    font-size: 36px;
    text-align: center;
    margin-bottom: 60px;
    font-weight: 700;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.step {
    text-align: center;
    padding: 30px;
    background: var(--light-bg);
    border-radius: 12px;
    transition: transform 0.3s ease;
}

.step:hover {
    transform: translateY(-5px);
}

.step-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 700;
    color: white;
}

.step-title {
    font-size: 24px;
    margin-bottom: 10px;
}

.step-text {
    color: var(--text-gray);
    font-size: 16px;
}

/* Currencies */
.currencies {
    padding: 80px 0;
    background: var(--light-bg);
}

.currency-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.currency-item {
    background: var(--dark-bg);
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
    transition: all 0.3s ease;
}

.currency-item:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transform: scale(1.05);
}

.currency-note {
    text-align: center;
    color: var(--text-gray);
    font-size: 18px;
    font-style: italic;
}

/* Advantages */
.advantages {
    padding: 80px 0;
    background: var(--dark-bg);
}

.advantage-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.advantage-item {
    text-align: center;
    padding: 30px;
}

.advantage-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.advantage-title {
    font-size: 24px;
    margin-bottom: 10px;
}

.advantage-text {
    color: var(--text-gray);
    font-size: 16px;
}

/* Footer */
.footer {
    background: var(--light-bg);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-title {
    font-size: 20px;
    margin-bottom: 15px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-gray);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .section-title {
        font-size: 28px;
    }

    .steps,
    .advantage-list {
        grid-template-columns: 1fr;
    }

    .currency-list {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .logo span {
        font-size: 18px;
    }

    .logo img {
        width: 40px;
        height: 40px;
    }
}