:root {
    color-scheme: dark;

    --bg: #05070b;
    --panel: #0b1220;
    --text: #f4f7fb;
    --muted: #a9b4c3;
    --blue: #1688ff;
    --blue-soft: #4aa5ff;
    --border: #18345a;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    min-height: 100vh;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at 30% 20%, #0c2342 0, transparent 34rem),
        var(--bg);
    color: var(--text);
}

main {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 1.5rem;
}

section {
    width: min(900px, 100%);
    text-align: center;
}

section img {
    display: block;
    width: min(420px, 80vw);
    height: auto;
    margin: 0 auto 2rem;
    filter: drop-shadow(0 0 28px rgba(22, 136, 255, 0.25));
}

h1 {
    margin: 0;
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 0.95;
    letter-spacing: -0.05em;
}

h2 {
    margin: 1rem 0 1.5rem;
    font-size: clamp(1.4rem, 3vw, 2rem);
    color: var(--blue-soft);
    font-weight: 600;
}

p {
    max-width: 680px;
    margin: 0.75rem auto;
    color: var(--muted);
    font-size: 1.08rem;
    line-height: 1.7;
}

strong {
    color: var(--text);
}

nav {
    margin-top: 2rem;
}

nav a {
    display: inline-block;
    padding: 0.9rem 1.4rem;
    border: 1px solid var(--border);
    border-radius: 0.65rem;
    background: var(--panel);
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    transition:
        border-color 0.15s ease,
        background 0.15s ease,
        transform 0.15s ease;
}

nav a:hover,
nav a:focus-visible {
    background: #10213a;
    border-color: var(--blue);
    transform: translateY(-1px);
    outline: none;
}

footer {
    padding: 1.25rem;
    text-align: center;
    border-top: 1px solid rgba(24, 52, 90, 0.55);
}

footer p {
    margin: 0;
    font-size: 0.9rem;
    color: #78869a;
}

@media (max-width: 600px) {
    main {
        padding-top: 2rem;
    }

    section img {
        width: min(320px, 85vw);
    }

    p {
        font-size: 1rem;
    }
}