:root {
    --bg: #0b0f14;
    --panel: #121821;
    --ink: #eaf2ff;
    --muted: #9fb3d1;
    --accent: #5aa9ff;
    --border: #223042;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: linear-gradient(180deg, #0b0f14, #0e141c 40%, #0b0f14);
    color: var(--ink);
    font-family: ui-sans-serif, -apple-system, "Segoe UI", Pretendard, system-ui, Roboto, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
    line-height: 1.45;
    padding: 24px;
}

header {
    max-width: 980px;
    margin: 0 auto 18px auto;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
}

h1 {
    margin: 0;
    font-size: 20px;
}

.pill {
    background: #0b111a;
    border: 1px solid var(--border);
    border-radius: 999px;
    color: var(--muted);
    font-size: 12px;
    padding: 6px 10px;
}

.app {
    max-width: 980px;
    margin: 0 auto;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 14px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .35);
    padding: 20px;
}

#nav-ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 14px;
}

#nav-ul li {
    grid-column: span 12;
}

@media (min-width: 800px) {
    #nav-ul li {
        grid-column: span 4;
    }
}

#nav-ul a {
    display: flex;
    min-height: 68px;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #0f1520;
    color: inherit;
    text-decoration: none;
    font-size: 16px;
    font-weight: 650;
    transition: transform .15s, border-color .15s, background-color .15s;
}

#nav-ul a::after {
    content: "";
    width: 10px;
    height: 10px;
    flex: 0 0 10px;
    border-radius: 50%;
    background: var(--muted);
    box-shadow: 0 0 0 3px rgba(159, 179, 209, .12);
}

#nav-ul a:hover,
#nav-ul a:focus-visible {
    transform: translateY(-1px);
    border-color: var(--accent);
    background: #0b111a;
    outline: none;
}

#nav-ul a[data-status="ok"]::after {
    background: #66e0a3;
    box-shadow: 0 0 0 3px rgba(102, 224, 163, .14);
}

#nav-ul a[data-status="error"]::after {
    background: #ff5f6d;
    box-shadow: 0 0 0 3px rgba(255, 95, 109, .14);
}