:root {
  color-scheme: light;
  --ink: #172031;
  --muted: #667085;
  --paper: #fff;
  --line: #d8dee9;
  --brand: #125f4b;
  --brand-soft: #e6f4ef;
  --warn: #9a5b00;
  --danger: #a52a2a;
  font-family: Inter, Pretendard, "Noto Sans KR", system-ui, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: #f5f7f8; color: var(--ink); line-height: 1.55; }
a { color: var(--brand); }
header { background: var(--ink); color: #fff; }
.nav, main, .hero { width: min(1120px, calc(100% - 32px)); margin: auto; }
.nav { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.nav a { color: #fff; text-decoration: none; }
.brand { font-size: 1.2rem; font-weight: 800; letter-spacing: -.02em; }
.hero { padding: 72px 0 64px; }
.hero h1 { max-width: 760px; font-size: clamp(2.2rem, 6vw, 4.6rem); line-height: 1.04; letter-spacing: -.055em; margin: 0 0 24px; }
.hero p { max-width: 680px; font-size: 1.15rem; color: #d6dde8; }
main { padding: 40px 0 80px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 16px; }
.card, .panel { background: var(--paper); border: 1px solid var(--line); border-radius: 14px; padding: 20px; box-shadow: 0 7px 20px rgba(20, 30, 50, .04); }
.card h2, .panel h2 { margin-top: 0; }
.eyebrow { color: #6fdfbd; font-weight: 700; }
.muted { color: var(--muted); }
.stack { display: grid; gap: 18px; }
button, input, select { font: inherit; }
button { border: 0; border-radius: 9px; padding: 10px 14px; background: var(--brand); color: #fff; font-weight: 700; cursor: pointer; }
button.secondary { color: var(--brand); background: var(--brand-soft); }
button.danger { background: var(--danger); }
button:disabled { opacity: .5; cursor: wait; }
input, select { max-width: 100%; border: 1px solid var(--line); border-radius: 8px; padding: 8px; background: #fff; }
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between; }
.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { padding: 11px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
th { font-size: .84rem; color: var(--muted); }
.badge { display: inline-block; padding: 3px 9px; border-radius: 999px; background: var(--brand-soft); color: var(--brand); font-size: .8rem; font-weight: 700; }
.hidden { display: none !important; }
#message { position: sticky; top: 8px; z-index: 3; border-radius: 10px; padding: 10px 14px; background: #fff4dc; color: var(--warn); }
#message.is-error { color: var(--danger); }
.metric-value { font-size: 1.7rem; }
.prose { max-width: 760px; }
.prose h1 { font-size: 2.2rem; letter-spacing: -.04em; }
.prose h2 { margin-top: 2rem; }
footer { border-top: 1px solid var(--line); padding: 32px 16px; text-align: center; color: var(--muted); }
@media (max-width: 680px) { .hero { padding-top: 46px; } .nav { align-items: flex-start; padding: 16px 0; } }