:root {
    --bg: #f5f7fb;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --border: #e5e7eb;
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    --radius: 18px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 35%),
        var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px 16px;
}

.wrapper {
    width: 100%;
    max-width: 760px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px 32px;
}

h1 {
    margin: 0 0 12px;
    font-size: 32px;
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.02em;
}

p.lead {
    margin: 0 0 28px;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.6;
}

ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 14px;
}

li {
    margin: 0;
}

a {
    display: block;
    text-decoration: none;
    color: var(--primary);
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px 18px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.2s ease;
    word-break: break-word;
}

a:hover {
    color: var(--primary-hover);
    border-color: rgba(37, 99, 235, 0.28);
    background: #eff6ff;
    transform: translateY(-1px);
}

.footer-note {
    margin-top: 24px;
    font-size: 13px;
    color: var(--muted);
    text-align: center;
}

@media (max-width: 640px) {
    .wrapper {
        padding: 28px 20px;
        border-radius: 16px;
    }

    h1 {
        font-size: 26px;
    }

    a {
        font-size: 15px;
        padding: 14px 16px;
    }
}