/* Common landing page styles */

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

:root {
    --bg: #FAFAFA;
    --bg-section: #FFFFFF;
    --text: #0A0A0A;
    --muted: #6B6B6B;
    --border: #E5E5E5;
    --accent: #0047AB;
    --accent-hover: #003580;
    --accent-red: #E63946;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'IBM Plex Mono', 'Roboto Mono', monospace;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 1.125rem;
    line-height: 1.65;
    position: relative;
    overflow-x: hidden;
}

/* Фоновый блюр-эффект */
body::before {
    content: '';
    position: fixed;
    top: -20%;
    left: -20%;
    width: 140%;
    height: 140%;
    z-index: -1;
    opacity: 1;
    pointer-events: none;
    background: radial-gradient(circle 800px at 20% 30%, #E0E7FF, transparent),
                radial-gradient(circle 600px at 80% 60%, #DBEAFE, transparent),
                radial-gradient(circle 700px at 40% 80%, #F3F4F6, transparent);
    filter: blur(100px);
    animation: blurMove 25s ease-in-out infinite;
}

@keyframes blurMove {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(150px, -100px) scale(1.1);
    }
    66% {
        transform: translate(-100px, 150px) scale(0.95);
    }
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 2rem;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text);
}

h2 {
    font-size: clamp(1.75rem, 3vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--text);
    line-height: 1.25;
}

h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text);
}

p {
    color: var(--muted);
    font-size: 1.125rem;
    line-height: 1.65;
}

strong {
    color: var(--text);
    font-weight: 500;
}

code, .mono {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text);
    background: #F5F5F5;
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    font-family: var(--font-sans);
    font-size: 1.125rem;
    font-weight: 500;
    text-decoration: none;
    border: 2px solid var(--accent);
    color: var(--accent);
    background: transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    border-radius: 8px;
}

.btn:hover {
    background: rgba(0, 71, 171, 0.1);
}

.btn-primary {
    background: var(--accent);
    color: #FFFFFF;
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 0;
}

/* HEADER */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(250, 250, 250, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    font-family: var(--font-mono);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    letter-spacing: 0.05em;
}

nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

nav a {
    font-size: 1rem;
    color: var(--muted);
    text-decoration: none;
    transition: color 0.2s ease;
    font-weight: 400;
}

nav a:hover {
    color: var(--text);
}

.nav-cta {
    font-size: 1rem;
    padding: 0.625rem 1.5rem;
}

/* FOOTER */
footer {
    padding: 2.5rem 0;
    background: var(--bg-section);
}

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

footer .logo {
    font-size: 1rem;
}

footer small {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--muted);
}

/* RESPONSIVE */
@media (max-width: 768px) {
    body {
        font-size: 1rem;
    }

    h1 {
        font-size: clamp(2rem, 8vw, 2.5rem);
    }

    h2 {
        font-size: clamp(1.5rem, 6vw, 1.75rem);
    }

    p {
        font-size: 1rem;
    }

    .container {
        padding: 0 1.25rem;
    }

    nav a:not(.nav-cta) {
        display: none;
    }
}