:root {
    --bg: #ffffff;
    --fg: #1e1e1e;
    --card-bg: #f8f9fa;
    --accent: #7c3aed; /* Фиолетовый — идеален для магии и технологий */
    --accent-dark: #6d28d9;
    --border: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f0f0f;
        --fg: #f0f0f0;
        --card-bg: #1a1a1a;
        --border: #333;
        --shadow: rgba(0, 0, 0, 0.4);
    }
}

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

body {
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

header {
    padding: 0 2rem 4rem;

    background: linear-gradient(135deg, #1e1b4b, #5b21b6);
    color: white;

    >*{
        width: 100%;

        display: flex;
        flex-wrap: nowrap;
        justify-content: center;
    }

    nav {
        display: flex;
        justify-content: flex-end;
        width: 50%;
        margin: 0 auto;
        padding: 1rem 0;
        
        a {margin: 0 5px;}
    }

    div {margin-bottom: 1rem;}
    div * {display: inline;}
}
.logo {
    height: 9rem;
}

h1 {
    font-size: 4.2rem;
    font-weight: 800;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
    letter-spacing: -0.5px;
    align-content: center;
    margin-left: 10px;
}

.subtitle {
    font-size: 1.4rem;
    /* max-width: 750px;
    margin: 0 auto 2.5rem; */
    opacity: 0.95;
    font-weight: 500;
}

.btn {
    display: inline-block;
    background: var(--accent);
    color: white;
    padding: 0.85rem 2.2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 700;
    margin: 0.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.4);
    font-size: 1.05rem;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.6);
    background: var(--accent-dark);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: 5rem 0;
}

h2 {
    font-size: 2.4rem;
    margin-bottom: 2.5rem;
    text-align: center;
    position: relative;
}

h2:after {
    content: '';
    display: block;
    width: 70px;
    height: 4px;
    background: var(--accent);
    margin: 0.8rem auto 0;
    border-radius: 2px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 1.8rem;
    box-shadow: 0 8px 20px var(--shadow);
    border: 1px solid var(--border);
    transition: transform 0.3s ease;
}

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

.feature-card h3 {
    color: var(--accent);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.about-text {
    max-width: 800px;
    margin: 0 auto 2.5rem;
    font-size: 1.15rem;
    line-height: 1.8;
}

footer {
    text-align: center;
    padding: 3rem 2rem;
    opacity: 0.7;
    font-size: 0.95rem;
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

@media (max-width: 600px) {
    h1 { font-size: 2.8rem; }
    h2 { font-size: 1.9rem; }
    .subtitle { font-size: 1.15rem; }
    section { padding: 3rem 0; }
    .btn { display: block; margin: 1rem auto; width: 80%; }
}