:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --text: #15181e;
  --muted: #5d6573;
  --line: #e3e6eb;
  --accent: #4f46e5;
  --accent-text: #ffffff;
  --ok: #16794a;
  --bad: #b42318;
  --radius: 14px;
  --gutter: 16px;
  --font: system-ui, -apple-system, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --surface: #181b21;
    --text: #eceef2;
    --muted: #9aa3b2;
    --line: #272b33;
    --accent: #8b85ff;
    --accent-text: #0f1115;
    --ok: #4ade80;
    --bad: #f87171;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--font);
}

main { flex: 1; }

a { color: var(--accent); }
code { font-family: var(--mono); font-size: .9em; background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; }

.wrap { max-width: 880px; margin: 0 auto; padding: 0 var(--gutter); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 880px;
  margin: 0 auto;
  padding: 14px var(--gutter);
}
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--text); font-weight: 800; letter-spacing: .02em; text-decoration: none; }
.header-actions { display: flex; align-items: center; gap: 8px; }

.hero { padding-top: 40px; padding-bottom: 16px; }
.hero h1, .empty h1 { margin: 4px 0 8px; font-size: clamp(2rem, 6vw, 2.8rem); line-height: 1.15; letter-spacing: -.01em; }
.eyebrow { margin: 0; color: var(--accent); font: 600 .85rem/1 var(--mono); letter-spacing: .04em; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }

.section-title { margin: 28px 0 12px; font-size: 1.05rem; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; }
.card { display: flex; flex-direction: column; gap: 4px; padding: 16px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.card-label { color: var(--muted); font-size: .8rem; }
.card-value { font-size: 1.05rem; overflow-wrap: anywhere; }
.card-value.is-ok { color: var(--ok); }
.card-value.is-bad { color: var(--bad); }

.empty { padding-top: 64px; padding-bottom: 64px; }

.btn {
  display: inline-block;
  margin-top: 8px;
  padding: 10px 18px;
  background: var(--accent);
  color: var(--accent-text);
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
}
.btn:hover { filter: brightness(1.08); }
.btn:focus-visible, a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  max-width: 880px;
  width: 100%;
  margin: 40px auto 0;
  padding: 20px var(--gutter) calc(20px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .85rem;
}
.site-footer a { color: inherit; font-family: var(--mono); }