/* 공통 스타일 — 자녀(관리자) 화면. 접근성 고려(큰 글씨, 고대비). */
:root {
  --green: #4caf50;
  --green-dark: #388e3c;
  --bg: #f4f8f2;
  --card: #ffffff;
  --text: #24312a;
  --muted: #6b7b70;
  --border: #d9e5da;
  --danger: #e05252;
  --accent: #ff9800;
  --radius: 16px;
  --shadow: 0 4px 16px rgba(0,0,0,0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Malgun Gothic', 'Apple SD Gothic Neo', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 18px;
  line-height: 1.6;
}

a { color: var(--green-dark); }

.wrap { max-width: 900px; margin: 0 auto; padding: 20px 16px 60px; }
.center { max-width: 460px; }

header.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px; background: var(--green); color: #fff;
  box-shadow: var(--shadow);
}
header.topbar h1 { font-size: 22px; margin: 0; }
header.topbar .sub { font-size: 14px; opacity: 0.9; }
header.topbar nav a, header.topbar nav button {
  color: #fff; margin-left: 14px; text-decoration: none; font-size: 16px;
  background: rgba(255,255,255,0.18); border: none; padding: 8px 14px; border-radius: 10px; cursor: pointer;
}

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; margin: 16px 0; box-shadow: var(--shadow);
}

h2 { font-size: 24px; margin: 0 0 14px; }
h3 { font-size: 20px; margin: 0 0 10px; }
.muted { color: var(--muted); }
.small { font-size: 15px; }

label { display: block; font-weight: 600; margin: 14px 0 6px; }
input[type=text], input[type=email], input[type=password], input[type=number], textarea, select {
  width: 100%; padding: 14px; font-size: 18px; border: 2px solid var(--border);
  border-radius: 12px; background: #fff; color: var(--text);
}
input:focus, textarea:focus, select:focus { outline: 3px solid #a5d6a7; border-color: var(--green); }
textarea { min-height: 110px; resize: vertical; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 22px; font-size: 18px; font-weight: 700; border: none; border-radius: 12px;
  background: var(--green); color: #fff; cursor: pointer; text-decoration: none;
}
.btn:hover { background: var(--green-dark); }
.btn.block { width: 100%; }
.btn.big { font-size: 22px; padding: 18px 26px; }
.btn.secondary { background: #eaf3ea; color: var(--green-dark); }
.btn.outline { background: #fff; color: var(--green-dark); border: 2px solid var(--green); }
.btn.danger { background: var(--danger); }
.btn.accent { background: var(--accent); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }

.tag { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 14px; background: #eaf3ea; color: var(--green-dark); }
.tag.ox { background: #fff3e0; color: #e65100; }
.tag.photo { background: #e3f2fd; color: #1565c0; }

.msg { padding: 12px 16px; border-radius: 12px; margin: 12px 0; font-weight: 600; }
.msg.error { background: #fdecec; color: var(--danger); }
.msg.ok { background: #e8f5e9; color: var(--green-dark); }
.hidden { display: none !important; }

.quiz-item { border: 1px solid var(--border); border-radius: 12px; padding: 14px; margin: 10px 0; background: #fafdf9; }
.quiz-item .q { font-weight: 700; margin: 6px 0; }
.quiz-item .opts { font-size: 15px; color: var(--muted); }
.quiz-item img { max-width: 120px; border-radius: 10px; margin-top: 8px; }

.player-card { display: flex; flex-direction: column; gap: 8px; }
.player-card .code { font-size: 30px; font-weight: 800; letter-spacing: 4px; color: var(--green-dark); }
.player-card .actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 10px; }
.player-card .actions .btn { padding: 12px 10px; font-size: 15px; white-space: nowrap; }
.player-card .actions .btn.accent { grid-column: 1 / -1; }