:root {
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-glass: rgba(30, 41, 59, 0.7);
    --primary: #00d1ff;
    --primary-glow: rgba(0, 209, 255, 0.4);
    --accent: #7000ff;
    --text: #f8fafc;
    --text-dim: #94a3b8;
    --border: rgba(255, 255, 255, 0.1);
    --glass-blur: blur(12px);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    width: 100%;
}

/* --- Container --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Header & Navigation --- */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 80px;
    display: flex;
    align-items: center;
    background: var(--surface-glass);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border);
    transition: height 0.3s, background 0.3s;
}

header.scrolled {
    height: 64px;
    background: rgba(15, 23, 42, 0.9);
}

header .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}


nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
    z-index: 1001;
}

.logo span {
    color: #ffffff;
    font-weight: 700;
    font-size: 1.2rem;
}

.logo-text {
    color: var(--accent);
    /* Тот самый фиолетовый */
    font-weight: 800;
    /* Сделаем чуть жирнее для стиля */
    font-size: 1.2rem;
    letter-spacing: 0.05em;
}

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
    font-size: 0.95rem;
}

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

/* Hamburger */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
    padding: 5px;
}

.bar {
    width: 25px;
    height: 2px;
    background-color: var(--text);
    transition: 0.3s;
}

/* --- Hero Section --- */
.hero {
    padding: 160px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    filter: blur(80px);
    z-index: -1;
    opacity: 0.5;
    pointer-events: none;
}

h1 {
    font-size: clamp(2.2rem, 8vw, 4.5rem);
    line-height: 1.1;
    margin-bottom: 24px;
    font-weight: 900;
    letter-spacing: -0.04em;
    background: linear-gradient(to bottom right, #fff 50%, var(--text-dim));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: clamp(1rem, 3vw, 1.25rem);
    color: var(--text-dim);
    max-width: 650px;
    margin: 0 auto 48px;
}

.btn {
    display: inline-block;
    background: var(--primary);
    color: #000;
    padding: 16px 32px;
    border-radius: 12px;
    font-weight: 700;
    text-decoration: none;
    transition: 0.3s;
    box-shadow: 0 0 20px var(--primary-glow);
    border: none;
    cursor: pointer;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 35px var(--primary-glow);
}

.hero-mockup {
    margin-top: 60px;
    border-radius: 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    padding: 8px;
    box-shadow: 0 40px 100px -20px rgba(0, 0, 0, 0.5);
    max-width: 100%;
    height: auto;
}

/* --- Features --- */
.features {
    padding: 100px 0;
    background: linear-gradient(to bottom, var(--bg), #111a2e);
}

.section-tag {
    color: var(--primary);
    text-transform: uppercase;
    font-weight: 800;
    letter-spacing: 0.2em;
    font-size: 0.75rem;
    margin-bottom: 12px;
    display: block;
    text-align: center;
}

.section-title {
    text-align: center;
    font-size: clamp(1.8rem, 5vw, 2.5rem);
    margin-bottom: 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background: var(--surface-glass);
    border: 1px solid var(--border);
    padding: 40px;
    border-radius: 24px;
    transition: 0.3s;
    text-align: center;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 20px;
    display: block;
}

/* --- FAQ --- */
.faq {
    padding: 100px 0;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    text-align: left;
}

.faq-answer {
    padding-top: 15px;
    color: var(--text-dim);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* --- Footer --- */
footer {
    padding: 60px 0 30px;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-links ul {
    list-style: none;
    margin-top: 15px;
}

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

.footer-links a {
    color: var(--text-dim);
    text-decoration: none;
    transition: 0.2s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.9rem;
}

.footer-brand .logo-text {
    color: #ffffff;
    font-weight: 800;
    font-size: 1.5rem;
    text-decoration: none;
    display: inline-block;
    margin-bottom: 16px;
}

.footer-brand .logo-text:hover {
    color: var(--primary);
}

/* --- Mobile Adaptive --- */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        max-width: 320px;
        height: 100vh;
        background: var(--surface);
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        gap: 32px;
        padding: 80px 40px;
        transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 999;
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    }

    .nav-links.active {
        right: 0;
    }

    .menu-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .menu-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .nav-links a {
        font-size: 1.25rem;
        color: var(--text);
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    h1 {
        font-size: 2.5rem;
    }
}