:root {
    --bg: #07111f;
    --surface: #0d1b2e;
    --surface-light: #13243a;
    --ink: #eef6ff;
    --muted: #9fb3ca;
    --accent: #2e9dff;
    --accent-soft: rgba(46, 157, 255, 0.16);
    --line: rgba(159, 179, 202, 0.22);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
    background:
        radial-gradient(circle at top left, rgba(46, 157, 255, 0.18), transparent 34rem),
        linear-gradient(160deg, #07111f 0%, #0b1627 58%, #07111f 100%);
    color: var(--ink);
    font-family: Segoe UI, system-ui, Arial, sans-serif;
}

.selection {
    width: min(980px, calc(100% - 32px));
    padding: 42px 0;
}

.eyebrow {
    margin: 0 0 12px;
    color: var(--accent);
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

h1 {
    margin: 0;
    font-size: clamp(38px, 7vw, 72px);
    line-height: 1;
    letter-spacing: 0;
}

.intro {
    max-width: 560px;
    margin: 18px 0 34px;
    color: var(--muted);
    font-size: 20px;
}

.year-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.year-card {
    min-height: 154px;
    display: grid;
    align-content: space-between;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: linear-gradient(145deg, var(--surface-light), var(--surface));
    color: var(--ink);
    text-decoration: none;
    box-shadow: 0 22px 60px rgba(0, 0, 0, 0.18);
    transition: border-color 140ms ease, transform 140ms ease, background 140ms ease;
}

.year-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
    background:
        linear-gradient(145deg, var(--accent-soft), transparent),
        linear-gradient(145deg, var(--surface-light), var(--surface));
}

.year-card span {
    color: var(--muted);
    font-weight: 800;
}

.year-card strong {
    color: var(--accent);
    font-size: 58px;
    line-height: 1;
}

@media (max-width: 720px) {
    .year-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 460px) {
    .selection {
        padding: 28px 0;
    }

    .year-grid {
        grid-template-columns: 1fr;
    }
}