:root {
  --bg: #F6F7F4; --card: #FFFFFF; --ink: #26302B; --soft: #6C7670;
  --line: #DFE3DC; --accent: #2F6B4F; --accent-soft: #E4EFE8;
  --danger: #B23A30; --danger-soft: #F6E4E1; --warn: #8A6D1F; --warn-soft: #F5EEDA;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", "Malgun Gothic", sans-serif;
  font-size: 15px; line-height: 1.55; }
a { color: var(--accent); text-decoration: none; }
nav { background: var(--card); border-bottom: 1px solid var(--line); padding: 0 16px;
  display: flex; align-items: center; gap: 4px; flex-wrap: wrap; position: sticky; top: 0; z-index: 5; }
nav .brand { font-weight: 800; padding: 12px 10px 12px 0; font-size: 16px; }
nav a.item { padding: 12px 10px; color: var(--ink); border-bottom: 2px solid transparent; }
nav a.item.on { border-bottom-color: var(--accent); color: var(--accent); font-weight: 700; }
nav .spacer { flex: 1; }
nav .who { color: var(--soft); font-size: 13px; padding-right: 8px; }
main { max-width: 880px; margin: 0 auto; padding: 22px 16px 60px; }
h1 { font-size: 21px; margin: 4px 0 16px; }
h2 { font-size: 16px; margin: 22px 0 10px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px 18px; margin-bottom: 16px; }
.msg { background: var(--accent-soft); color: var(--accent); border-radius: 8px;
  padding: 10px 14px; margin-bottom: 14px; font-weight: 600; font-size: 14px; }
.error { background: var(--danger-soft); color: var(--danger); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th { text-align: left; color: var(--soft); font-size: 12px; letter-spacing: .04em;
  border-bottom: 2px solid var(--line); padding: 6px 8px; }
td { border-bottom: 1px solid var(--line); padding: 8px; vertical-align: middle; }
tr:last-child td { border-bottom: 0; }
.table-wrap { overflow-x: auto; }
input, select, textarea { font: inherit; padding: 9px 11px; border: 1px solid var(--line);
  border-radius: 8px; background: #fff; color: var(--ink); max-width: 100%; }
input[type=checkbox] { width: 17px; height: 17px; }
textarea { width: 100%; min-height: 110px; }
label { font-size: 13px; color: var(--soft); font-weight: 600; display: block; margin-bottom: 4px; }
.field { margin-bottom: 12px; }
button, .btn { font: inherit; font-weight: 700; padding: 9px 16px; border-radius: 8px;
  border: 1px solid var(--accent); background: var(--accent); color: #fff; cursor: pointer;
  display: inline-block; }
button.ghost, .btn.ghost { background: #fff; color: var(--accent); }
button.small, .btn.small { padding: 4px 10px; font-size: 13px; }
button.danger { background: #fff; border-color: var(--danger); color: var(--danger); }
.pill { display: inline-block; padding: 2px 10px; border-radius: 99px; font-size: 12px; font-weight: 700; }
.pill.ok { background: var(--accent-soft); color: var(--accent); }
.pill.bad { background: var(--danger-soft); color: var(--danger); }
.pill.warn { background: var(--warn-soft); color: var(--warn); }
.pill.gray { background: #ECEEEA; color: var(--soft); }
.big-menu { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 12px; }
.big-menu a { background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 22px 18px; font-weight: 700; color: var(--ink); font-size: 16px; }
.big-menu a.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-size: 18px; }
.big-menu small { display: block; font-weight: 400; color: var(--soft); font-size: 13px; margin-top: 4px; }
.big-menu a.primary small { color: #DCEAE2; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-end; }
.grow { flex: 1; min-width: 160px; }
.muted { color: var(--soft); font-size: 13px; }
.mark-o { color: var(--accent); font-weight: 800; }
.mark-x { color: var(--danger); font-weight: 800; }
tr.flagged { background: var(--warn-soft); }
.exam-img { max-width: 100%; border: 1px solid var(--line); border-radius: 8px; }
/* 학습 카드 */
.study-card { background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  min-height: 190px; display: flex; flex-direction: column; align-items: center; justify-content: center;
  cursor: pointer; user-select: none; margin-bottom: 12px; }
.study-card .eng { font-size: 30px; font-weight: 800; }
.study-card .kor { font-size: 20px; color: var(--accent); margin-top: 8px; min-height: 28px; }
.study-nav { display: flex; gap: 10px; justify-content: center; align-items: center; }
@media (max-width: 640px) {
  nav a.item { padding: 10px 7px; font-size: 13.5px; }
  main { padding: 14px 10px 50px; }
  .card { padding: 13px 13px; }
}

/* 학생 검색 선택 위젯 */
.spick { position: relative; min-width: 180px; }
.spick-q.spick-err { border-color: var(--danger); }
.spick-list {
  position: absolute; z-index: 30; left: 0; right: 0; top: 100%;
  max-height: 260px; overflow-y: auto; background: #fff;
  border: 1px solid var(--line); border-radius: 6px;
  box-shadow: 0 6px 18px rgba(0,0,0,.12); margin-top: 2px;
}
.spick-row { padding: 7px 10px; cursor: pointer; }
.spick-row:hover { background: #f0f4ff; }
.spick-cls {
  float: right; font-size: 12px; color: #667;
  background: #eef1f5; border-radius: 10px; padding: 1px 8px;
}
.spick-none { padding: 8px 10px; color: #889; }

/* 배정 단어장 칩 (학생 관리) */
button.chip {
  display: inline-block; font-size: 12px; padding: 2px 10px; margin: 0 4px 4px 0;
  border: 1px solid var(--line); border-radius: 12px;
  background: #f2f5f3; color: var(--ink); cursor: pointer; line-height: 1.6;
}
button.chip:hover { background: #fdecec; border-color: var(--danger); }

/* 문서 스캔 카메라 오버레이 */
.scn-overlay { position: fixed; inset: 0; z-index: 100; background: #000; display: flex; flex-direction: column; }
.scn-top { display: flex; justify-content: space-between; align-items: center; gap: 8px;
  padding: max(10px, env(safe-area-inset-top)) 12px 10px; color: #fff; }
.scn-status { font-size: 13px; color: #a7f3d0; }
.scn-btn { background: rgba(255,255,255,.14); color: #fff; border: none; border-radius: 8px;
  padding: 7px 12px; font-size: 13px; }
.scn-view { position: relative; flex: 1; min-height: 0; }
.scn-view video, .scn-view canvas { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; }
.scn-flash { position: absolute; inset: 0; background: #fff; opacity: 0; pointer-events: none; transition: opacity .15s; }
.scn-flash.on { opacity: .75; }
.scn-bottom { padding: 8px 12px calc(10px + env(safe-area-inset-bottom)); }
.scn-thumbs { display: flex; gap: 6px; overflow-x: auto; min-height: 52px; margin-bottom: 8px; }
.scn-thumbs img { height: 50px; border-radius: 6px; border: 2px solid #34d399; }
.scn-controls { display: flex; align-items: center; justify-content: center; gap: 22px; }
.scn-shutter { width: 62px; height: 62px; border-radius: 50%; background: #fff;
  border: 5px solid rgba(255,255,255,.4); }
.scn-done { background: #10b981; font-weight: 700; }
.scn-done:disabled { opacity: .4; }

/* 촬영본 단독 보기 (스캔 카메라) */
.scn-viewer { position: absolute; inset: 0; z-index: 10; background: rgba(0,0,0,.96);
  display: flex; flex-direction: column; }
.scn-viewer-top { display: flex; justify-content: space-between; align-items: center;
  padding: max(10px, env(safe-area-inset-top)) 12px 8px; }
.scn-viewer-body { flex: 1; min-height: 0; display: flex; align-items: center; justify-content: center; }
.scn-viewer-body img { max-width: 100%; max-height: 100%; object-fit: contain; border-radius: 4px; }
.scn-viewer-bottom { display: flex; justify-content: center;
  padding: 10px 12px calc(12px + env(safe-area-inset-bottom)); }