:root {
    color-scheme: light;
    --primary: #3721f4;
    --primary-soft: #f0efff;
    --danger: #d92d20;
    --text: #1d2939;
    --muted: #667085;
    --border: #e4e7ec;
    --surface: #ffffff;
    --background: #f8f9fc;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                 "Noto Sans KR", sans-serif;
    line-height: 1.65;
}

main {
    width: min(760px, calc(100% - 32px));
    margin: 48px auto;
}

.card {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--surface);
    box-shadow: 0 12px 32px rgba(16, 24, 40, 0.08);
}

header {
    padding: 36px;
    background: linear-gradient(135deg, var(--primary), #6554ff);
    color: #fff;
}

header p { margin: 8px 0 0; opacity: 0.9; }

h1 { margin: 0; font-size: clamp(1.7rem, 5vw, 2.25rem); }
h2 { margin: 24px 0 12px; font-size: 1.2rem; color: var(--primary); }
p, li { margin: 0 0 12px; }

section {
    padding: 28px 36px;
    border-top: 1px solid var(--border);
}

ol, ul { margin: 12px 0 0; padding-left: 24px; }
li + li { margin-top: 8px; }

.notice {
    margin-top: 18px;
    padding: 16px;
    border-left: 4px solid var(--danger);
    border-radius: 8px;
    background: #fff4f2;
}

.label {
    display: inline-block;
    margin-bottom: 10px;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 700;
}

.updated { color: var(--muted); font-size: 0.9rem; }

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

nav.links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

nav.links a {
    display: inline-block;
    padding: 12px 18px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    text-decoration: none;
    font-weight: 600;
    color: var(--text);
}

nav.links a:hover { border-color: var(--primary); color: var(--primary); }

footer {
    padding: 20px 36px 28px;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.9rem;
}

@media (max-width: 560px) {
    main { margin: 16px auto; }
    header, section { padding: 24px; }
    footer { padding: 18px 24px 24px; }
}