:root {
    --pink: #ff2d55;
    --purple: #af52de;
    --blue: #007aff;
    --bg-color: #ffffff;
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --card-bg: rgba(255, 255, 255, 0.82);
    --card-border: rgba(255, 255, 255, 0.5);
    --selection-bg: rgba(175, 82, 222, 0.2);
    --max-width: 1000px;
    --transition-speed: 0.3s;
}

/* Language Switching */
[lang="en"] :where([lang="ru"]),
[lang="ru"] :where([lang="en"]) {
    display: none !important;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #000000;
        --text-primary: #f5f5f7;
        --text-secondary: #a1a1a6;
        --card-bg: rgba(28, 28, 30, 0.85);
        --card-border: rgba(44, 44, 46, 0.6);
    }
}

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

body {
    font-family: 'SF Pro Display', 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.bg-fixed {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at 0% 0%, rgba(255, 45, 85, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 100% 100%, rgba(0, 122, 255, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(175, 82, 222, 0.03) 0%, transparent 60%);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* Navbar Styles */
nav.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 32px 0;
    margin-bottom: 40px;
}

.nav-brand {
    font-size: 24px;
    font-weight: 800;
    text-decoration: none;
    background: linear-gradient(135deg, var(--pink), var(--purple), var(--blue));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: color var(--transition-speed);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 8px;
    border-left: 1px solid var(--card-border);
    padding-left: 24px;
    margin-left: 8px;
}

.lang-switcher .separator {
    color: var(--text-secondary);
    font-size: 12px;
    opacity: 0.5;
    user-select: none;
}

.lang-switcher a {
    font-size: 13px !important;
    letter-spacing: 0.05em;
}

/* Landing Page Hero */
.hero {
    text-align: center;
    padding: 80px 0;
    animation: fadeIn 1s ease-out;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero h1 {
    font-size: 64px;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    line-height: 1.1;
}

.hero p {
    font-size: 22px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    font-weight: 500;
}

.app-badge {
    height: 60px;
    transition: transform 0.2s;
}

.app-badge:hover {
    transform: scale(1.05);
}

/* Features Section */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin: 80px 0;
}

.feature-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 28px;
    padding: 40px;
    text-align: left;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 16px;
    color: var(--purple);
}

/* Article Styles (Privacy/Terms) */
article {
    background: var(--card-bg);
    backdrop-filter: blur(30px);
    border: 1px solid var(--card-border);
    border-radius: 32px;
    padding: 60px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.06);
    margin-bottom: 80px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

h2 {
    font-size: 24px;
    font-weight: 700;
    margin: 48px 0 20px;
    color: var(--purple);
}

h3 {
    font-size: 19px;
    font-weight: 600;
    margin: 32px 0 12px;
}

p,
li {
    font-size: 17px;
    margin-bottom: 20px;
}

ul {
    padding-left: 24px;
    margin-bottom: 24px;
}

.timestamp {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 11px;
    text-transform: uppercase;
    margin-top: 40px;
}

.invisible-link {
    color: inherit !important;
    text-decoration: none !important;
}

.invisible-link:hover {
    opacity: 1 !important;
}

.contact-section {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--card-border);
}

footer {
    text-align: center;
    padding: 60px 0 100px;
    color: var(--text-secondary);
    font-size: 14px;
}

a {
    color: var(--pink);
    text-decoration: none;
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.7;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 40px;
    }

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

    article {
        padding: 32px 24px;
    }

    .nav-links {
        gap: 16px;
        align-items: center;
    }

    .lang-switcher {
        padding-left: 12px;
        gap: 6px;
    }
}