:root {
  --bg: #071021;
  --bg-soft: #0c1a34;
  --panel: #102349;
  --line: #294777;
  --text: #e9f1ff;
  --muted: #aab9d3;
  --acc: #6de3ff;
  --acc-2: #9bffcf;
  --warn: #ffd27a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--text);
  font-family: "Pretendard", "Noto Sans KR", "Segoe UI", sans-serif;
  line-height: 1.65;
  background:
    radial-gradient(900px 500px at 10% -10%, #173566 0, transparent 55%),
    radial-gradient(700px 450px at 110% 20%, #173a5a 0, transparent 55%),
    var(--bg);
}

a { color: var(--acc); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: min(1040px, calc(100% - 32px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(109, 227, 255, 0.2);
  background: rgba(6, 14, 28, 0.88);
  backdrop-filter: blur(6px);
}

.nav {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand { font-weight: 800; letter-spacing: 0.04em; color: #f2f7ff; }

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 14px;
}

.hero {
  padding: 56px 0 28px;
}

.hero-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: 1.3fr 1fr;
}

.card {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(16, 35, 73, 0.9), rgba(10, 21, 44, 0.92));
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.3);
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--acc-2);
}

h1, h2, h3 { line-height: 1.3; margin: 0 0 12px; }
h1 { font-size: clamp(28px, 5vw, 42px); }
h2 { font-size: clamp(22px, 3vw, 30px); }
h3 { font-size: 20px; }
p { margin: 0 0 12px; }

.btn {
  display: inline-block;
  border: 1px solid rgba(109, 227, 255, 0.6);
  background: linear-gradient(180deg, #255371, #1a3d58);
  color: #f3fbff;
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 700;
}

.grid-2 {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.section { padding: 14px 0 18px; }

ul.clean {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.meta {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed rgba(170, 185, 211, 0.35);
  color: var(--muted);
  font-size: 14px;
}

.table-wrap { overflow-x: auto; }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 10px;
  border-bottom: 1px solid rgba(170, 185, 211, 0.2);
}

th { color: #c9dcff; }
td { color: var(--muted); }

.site-footer {
  margin-top: 24px;
  padding: 24px 0 42px;
  color: var(--muted);
  border-top: 1px solid rgba(170, 185, 211, 0.25);
}

.small { font-size: 13px; color: var(--muted); }

label { display: block; margin: 10px 0 6px; color: #c9dcff; }
input, textarea {
  width: 100%;
  border-radius: 10px;
  border: 1px solid #355587;
  background: #0d1f41;
  color: var(--text);
  padding: 10px 12px;
  font: inherit;
}
textarea { min-height: 140px; resize: vertical; }

.note {
  font-size: 13px;
  color: var(--muted);
}

@media (max-width: 900px) {
  .hero-grid, .grid-2 { grid-template-columns: 1fr; }
}