:root {
  --paper: #f3eee6;
  --sheet: #fbf7f1;
  --ink: #221c18;
  --muted: #5e564e;
  --line: #e3d8cb;
  --seal: #9d3b2c;
  --seal-soft: #f3e2db;
  --moss: #2d4a3d;
  --shadow: 0 1px 0 rgba(34, 28, 24, 0.04);
  color-scheme: light;
}

* { box-sizing: border-box; }

html { font-size: 18px; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Avenir Next", "Pretendard", "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  line-height: 1.65;
}

a { color: inherit; }

.site-header, .site-footer, .page, .admin-bar, .admin-main {
  width: min(980px, calc(100% - 2.4rem));
  margin-inline: auto;
}

.site-header, .admin-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.4rem 0 0.8rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.seal {
  display: inline-grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 1.5px solid var(--seal);
  color: var(--seal);
  border-radius: 2px;
  font-size: 0.85rem;
}

.nav { display: flex; gap: 1rem; }

.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover { color: var(--ink); }

.page { padding: 1.2rem 0 3rem; }

.lede h1 {
  margin: 0.2rem 0 0.6rem;
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.045em;
  font-weight: 650;
}

.kicker, .eyebrow {
  margin: 0;
  color: var(--seal);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.lede p, .prose p, .column-list a { max-width: 38rem; }

.column-list { list-style: none; margin: 1.2rem 0 0; padding: 0; }
.column-list li { padding: 0.9rem 0; border-top: 1px solid var(--line); }
.column-list a { display: block; text-decoration: none; }
.column-list strong { display: block; letter-spacing: -0.03em; }
.prose { max-width: 40rem; }

.split {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.sheet, .panel {
  background: var(--sheet);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1.15rem 1.2rem 1.25rem;
  box-shadow: var(--shadow);
}

.sheet h2, .panel h2 { margin: 0 0 0.7rem; font-size: 1.15rem; letter-spacing: -0.03em; }

.lecture-link {
  display: block;
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
  text-decoration: none;
}

.lecture-link strong { display: block; letter-spacing: -0.03em; }
.lecture-link span { color: var(--muted); }

form .field { display: flex; flex-direction: column; gap: 0.3rem; margin-bottom: 0.8rem; }
label { font-size: 0.86rem; color: var(--muted); }
input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  background: white;
  color: var(--ink);
  border-radius: 8px;
  padding: 0.62rem 0.7rem;
  font: inherit;
}
textarea { min-height: 8rem; resize: vertical; }
button, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 999px;
  background: var(--ink);
  color: var(--sheet);
  padding: 0.62rem 1rem;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}
.button.secondary, button.secondary { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.button.danger, button.danger { background: var(--seal); }
.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.quiet { color: var(--muted); font-size: 0.92rem; }
.hp { position: absolute; left: -9999px; height: 0; overflow: hidden; }

.definitions { margin: 2rem 0 0; padding: 0; }
.definitions div { padding: 0.85rem 0; border-top: 1px solid var(--line); }
.definitions dt { font-weight: 650; }
.definitions dd { margin: 0.2rem 0 0; color: var(--muted); }

.site-footer { padding: 0 0 2.5rem; color: var(--muted); font-size: 0.88rem; }
.flash { margin: 0.8rem 0; padding: 0.7rem 0.85rem; border-radius: 10px; background: var(--seal-soft); }
.flash.alert { background: #f8e7c8; }

.placeholder {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  background: var(--seal-soft);
  border-radius: 12px;
}
.placeholder ul { margin: 0.4rem 0 0; padding-left: 1.1rem; }

.admin-bar { padding-top: 1rem; }
.admin-main { padding-bottom: 3rem; }
.admin-main h1 { letter-spacing: -0.04em; font-size: 1.7rem; }
table { width: 100%; border-collapse: collapse; background: var(--sheet); }
th, td { text-align: left; padding: 0.65rem 0.55rem; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 0.92rem; }
th { color: var(--muted); font-weight: 600; }
.stats { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 1rem 0; }
.stat { background: var(--sheet); border: 1px solid var(--line); border-radius: 12px; padding: 0.7rem 0.85rem; min-width: 7rem; }
.stat b { display: block; font-size: 1.25rem; letter-spacing: -0.03em; }
.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.8rem 0 1rem; }
.filters input, .filters select { width: auto; }
.errors { color: var(--seal); margin: 0 0 0.8rem; padding-left: 1.1rem; }
.check-list { display: flex; flex-direction: column; gap: 0.35rem; margin-bottom: 0.8rem; }
.check-list label { color: var(--ink); display: flex; gap: 0.45rem; align-items: center; }
.check-list input { width: auto; }

@media (max-width: 760px) {
  html { font-size: 17px; }
  .split { grid-template-columns: 1fr; }
  .site-header, .admin-bar { align-items: flex-start; }
  table { display: block; overflow-x: auto; }
}