:root {
    color-scheme: light;
    --bg: #f5f7fa;
    --surface: #ffffff;
    --text: #253047;
    --muted: #657188;
    --accent: #3667d6;
    --border: #e4e9f0;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, Arial, sans-serif;
    line-height: 1.7;
}

header {
    background: #18243d;
    color: white;
    padding: 18px 24px;
}

nav {
    max-width: 960px;
    margin: auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 22px;
}

.logo {
    color: white;
    font-size: 22px;
    font-weight: 750;
    text-decoration: none;
    margin-right: auto;
}

nav a {
    color: #d5deef;
    text-decoration: none;
}

nav a:hover {
    color: white;
}

main {
    max-width: 960px;
    margin: 55px auto;
    padding: 0 20px;
    min-height: 55vh;
}

.hero {
    background: white;
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 48px;
}

h1 {
    font-size: clamp(30px, 5vw, 44px);
    line-height: 1.2;
    margin: 0 0 20px;
}

h2 {
    margin-top: 0;
}

p {
    color: var(--muted);
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 24px;
}

.card {
    padding: 28px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
}

a {
    color: var(--accent);
}

footer {
    text-align: center;
    padding: 32px 20px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 14px;
}

@media (max-width: 600px) {
    .hero {
        padding: 28px;
    }

    nav {
        gap: 12px;
    }

    .logo {
        width: 100%;
    }
}