:root {
  --bg: #f4f6fa;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e3e7ee;
  --pri: #2457d6;
  --pri-soft: #e8eefc;
  --present: #15803d;
  --present-bg: #dcfce7;
  --late: #b45309;
  --late-bg: #fef3c7;
  --absent: #b91c1c;
  --absent-bg: #fee2e2;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .06);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.5;
}
[hidden] { display: none !important; }
h1, h2, h3 { margin: 0; line-height: 1.3; }
h3 { font-size: 16px; }
button, input, select, textarea { font: inherit; color: inherit; }
.grow { flex: 1; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

/* ---------- 레이아웃 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 10px 16px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.topbar h1 { font-size: 17px; }
.tabs { display: flex; gap: 4px; }
.tab {
  border: 0; background: transparent; padding: 8px 14px; border-radius: 8px;
  cursor: pointer; color: var(--muted); font-weight: 600;
}
.tab:hover { background: var(--bg); }
.tab.on { background: var(--pri-soft); color: var(--pri); }

main { max-width: 1040px; margin: 0 auto; padding: 16px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 14px;
}
.cardhead { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.row { display: flex; align-items: center; gap: 10px; }
.row.wrap { flex-wrap: wrap; }
.stack { display: flex; flex-direction: column; gap: 10px; }

/* ---------- 폼 ---------- */
label.field, .field { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); }
input[type=text], input[type=email], input[type=password], input[type=date], input[type=month], input[type=tel], select, textarea {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--pri-soft); border-color: var(--pri); }
textarea { min-height: 120px; resize: vertical; }
select { width: auto; max-width: 100%; }
input[type=date] { width: auto; }

.btn {
  border: 1px solid var(--line); background: #fff; color: var(--text);
  padding: 8px 14px; border-radius: 8px; cursor: pointer; font-weight: 600; white-space: nowrap;
}
.btn:hover { background: var(--bg); }
.btn.primary { background: var(--pri); border-color: var(--pri); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--absent); border-color: #f3c4c4; }
.btn.danger:hover { background: var(--absent-bg); }
.btn.sm { padding: 5px 10px; font-size: 13px; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }

.check { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text); cursor: pointer; }
.check input { width: 18px; height: 18px; }

.chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { cursor: pointer; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--line); background: #fff; font-weight: 600; color: var(--text);
}
.chip input:checked + span { background: var(--pri); border-color: var(--pri); color: #fff; }
.chip input:focus-visible + span { outline: 2px solid var(--pri); outline-offset: 2px; }

.badge {
  display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 12px; font-weight: 700;
  background: var(--pri-soft); color: var(--pri);
}
.badge.off { background: #eef0f3; color: var(--muted); }
.badge.present { background: var(--present-bg); color: var(--present); }
.badge.late { background: var(--late-bg); color: var(--late); }
.badge.absent { background: var(--absent-bg); color: var(--absent); }

/* ---------- 로그인 ---------- */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.auth-card { width: 100%; max-width: 380px; }
.auth-card h1 { font-size: 22px; margin-bottom: 4px; }
.msg { padding: 10px 12px; border-radius: 8px; font-size: 14px; background: var(--pri-soft); color: var(--pri); }
.msg.error { background: var(--absent-bg); color: var(--absent); }
.link { background: none; border: 0; color: var(--pri); cursor: pointer; padding: 0; text-decoration: underline; }

/* ---------- 출석 체크 ---------- */
.datebox { display: flex; align-items: center; gap: 6px; }
.srow {
  display: grid;
  grid-template-columns: 110px auto 120px 1fr auto;
  gap: 10px; align-items: center;
  padding: 10px 0; border-top: 1px solid var(--line);
}
.srow:first-child { border-top: 0; }
.sname { font-weight: 700; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
.seg button {
  border: 0; border-right: 1px solid var(--line); background: #fff; cursor: pointer;
  padding: 8px 14px; font-weight: 600; color: var(--muted);
}
.seg button:last-child { border-right: 0; }
.seg button:hover { background: var(--bg); }
.seg button.on.present { background: var(--present-bg); color: var(--present); }
.seg button.on.late { background: var(--late-bg); color: var(--late); }
.seg button.on.absent { background: var(--absent-bg); color: var(--absent); }
.pub { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); white-space: nowrap; }
.pub input { width: 16px; height: 16px; }
.sumline { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--line); }
.empty { text-align: center; padding: 28px 12px; color: var(--muted); }

/* ---------- 월간 표 ---------- */
.tablewrap { overflow-x: auto; }
table.grid { border-collapse: collapse; width: 100%; font-size: 14px; }
table.grid th, table.grid td { border: 1px solid var(--line); padding: 7px 8px; text-align: center; white-space: nowrap; }
table.grid thead th { background: #f8fafc; font-weight: 700; }
table.grid td.nm, table.grid th.nm { text-align: left; position: sticky; left: 0; background: #fff; z-index: 1; }
table.grid thead th.nm { background: #f8fafc; }
table.grid td.nm button { background: none; border: 0; padding: 0; cursor: pointer; font-weight: 700; color: var(--pri); }
.cell-present { color: var(--present); font-weight: 800; }
.cell-late { color: var(--late); font-weight: 800; }
.cell-absent { color: var(--absent); font-weight: 800; }
.cell-none { color: #c3c9d4; }
.wk-sun { color: var(--absent); }
.wk-sat { color: var(--pri); }

.monthnav { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.monthnav button { width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--line); background: #fff; cursor: pointer; }

.loglist { list-style: none; margin: 0; padding: 0; }
.loglist li { display: flex; gap: 12px; padding: 8px 0; border-top: 1px solid var(--line); }
.loglist li:first-child { border-top: 0; }
.loglist .d { min-width: 92px; color: var(--muted); font-weight: 600; }

.detail-item { display: grid; grid-template-columns: 92px 64px 1fr; gap: 8px 12px; padding: 10px 0; border-top: 1px solid var(--line); align-items: start; }
.detail-item:first-child { border-top: 0; }

/* ---------- 반/학생 관리 ---------- */
.list { list-style: none; margin: 0; padding: 0; }
.list li { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-top: 1px solid var(--line); flex-wrap: wrap; }
.list li:first-child { border-top: 0; }
.list .info { flex: 1; min-width: 160px; }
.list .info b { display: block; }
.two { display: grid; grid-template-columns: 1fr; gap: 14px; }
.addrow { display: grid; grid-template-columns: 1fr 1fr 1fr auto; gap: 8px; margin-top: 12px; }

/* ---------- 모달 / 토스트 ---------- */
.modal-back {
  position: fixed; inset: 0; background: rgba(15, 23, 42, .45); z-index: 50;
  display: grid; place-items: center; padding: 16px; overflow-y: auto;
}
.modal { background: #fff; border-radius: 14px; width: 100%; max-width: 440px; padding: 20px; display: flex; flex-direction: column; gap: 12px; margin: auto; }
.modal-actions { display: flex; gap: 8px; align-items: center; margin-top: 4px; }

.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px);
  background: #111827; color: #fff; padding: 10px 16px; border-radius: 10px;
  opacity: 0; pointer-events: none; transition: .2s; z-index: 100; max-width: 90vw; font-size: 14px;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.error { background: var(--absent); }

/* ---------- 학부모 화면 ---------- */
.parent-wrap { max-width: 560px; margin: 0 auto; padding: 16px; }
.p-head { text-align: center; padding: 10px 0 14px; }
.p-head h1 { font-size: 22px; }
.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.tile { text-align: center; padding: 12px 6px; border-radius: 10px; }
.tile b { display: block; font-size: 24px; }
.tile.present { background: var(--present-bg); color: var(--present); }
.tile.late { background: var(--late-bg); color: var(--late); }
.tile.absent { background: var(--absent-bg); color: var(--absent); }
.rec { padding: 12px 0; border-top: 1px solid var(--line); }
.rec:first-child { border-top: 0; }
.rec-top { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; flex-wrap: wrap; }
.rec-top b { font-size: 15px; }
.rec p { margin: 2px 0; }

/* ---------- 모바일 ---------- */
@media (min-width: 900px) {
  .two { grid-template-columns: 1fr 1.5fr; align-items: start; }
}
@media (max-width: 760px) {
  .srow { grid-template-columns: 1fr; gap: 8px; }
  .srow .seg { width: 100%; }
  .srow .seg button { flex: 1; padding: 11px 0; }
  .addrow { grid-template-columns: 1fr; }
  .detail-item { grid-template-columns: 80px 1fr; }
  .detail-item > :nth-child(3) { grid-column: 1 / -1; }
  select { max-width: 100%; }
  .topbar { gap: 8px; }
}