:root {
  --bg: #0a1020;
  --bg-2: #121b35;
  --card: #101a31;
  --line: #2d3d67;
  --text: #f3f7ff;
  --muted: #a8b8dd;
  --brand: #62d6ff;
  --brand-2: #79f0be;
  --ok: #7ef2c2;
  --warn: #ffc77b;
  --danger: #ff8ea0;
  --radius: 16px;
  --max: 1120px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Noto Sans KR", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1000px 520px at 100% -10%, rgba(98, 214, 255, 0.18), transparent 60%),
    radial-gradient(760px 420px at -10% 10%, rgba(121, 240, 190, 0.14), transparent 55%),
    var(--bg);
}

.wrap { width: min(var(--max), 92vw); margin: 0 auto; }

.topbar { padding: 20px 0 12px; }
.brand {
  font-family: "Space Grotesk", sans-serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.brand span { color: var(--brand); }

.hero, .panel, .card, .section {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  border-radius: var(--radius);
}

.hero { padding: 24px; margin-bottom: 14px; }
.panel, .section { padding: 16px; margin-bottom: 12px; }
.card { padding: 16px; }

h1, h2, h3 {
  font-family: "Space Grotesk", sans-serif;
  margin-top: 0;
}
h1 { font-size: clamp(30px, 5vw, 52px); line-height: 1.08; margin-bottom: 10px; }
h2 { font-size: clamp(20px, 2.7vw, 30px); margin-bottom: 8px; }
h3 { font-size: 18px; margin-bottom: 8px; }
p, li { color: var(--muted); }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }

.btns, .actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 13px;
  font-weight: 700;
  transition: transform 140ms ease, opacity 140ms ease, border-color 140ms ease, outline 140ms ease;
}
.btn:hover { transform: translateY(-1px); border-color: #3e558f; }
.btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.btn-primary {
  background: linear-gradient(90deg, var(--brand), #b4eeff);
  border-color: transparent;
  color: #081325;
}
.btn-ghost { background: rgba(255,255,255,0.01); }

.pill {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 8px;
}
.status-ok { color: var(--ok); border-color: rgba(126,242,194,0.45); background: rgba(126,242,194,0.12); }
.status-warn { color: var(--warn); border-color: rgba(255,199,123,0.45); background: rgba(255,199,123,0.1); }

a {
  transition: outline 140ms ease;
}
a:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

.code {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  background: rgba(6, 11, 24, 0.8);
  color: #d7e6ff;
  overflow-x: auto;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 260ms ease, transform 260ms ease;
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

footer {
  padding: 18px 0 28px;
  color: var(--muted);
  font-size: 12px;
}

.tab-btn {
  transition: outline 140ms ease;
}
.tab-btn:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

@media (max-width: 960px) {
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}