:root {
  --bg: #f4f4f1; --surface: #fff; --surface2: #f8f8f6; --text: #1d1d1b; --text2: #66655f; --muted: #9a9890;
  --border: #e2e1dc; --border2: #cfcec7; --accent: #2457c5; --accent-bg: #e8effc; --danger: #c62f2f; --danger-bg: #fcebeb;
  --ok: #2c7a3c; --ok-bg: #e7f4e9; --warn-bg: #fff6d6; --radius: 8px;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: 'Noto Sans KR', system-ui, sans-serif; font-size: 14px; }
a { color: var(--accent); text-decoration: none; }
h1 { font-size: 18px; font-weight: 700; margin: 0; }
h2 { font-size: 15px; font-weight: 700; margin: 0 0 12px; }
input, textarea, select, button { font: inherit; color: inherit; }
input[type=text], input[type=number], input[type=password], input:not([type]), textarea, select {
  width: 100%; border: 1px solid var(--border2); border-radius: 6px; padding: 7px 10px; background: #fff; outline: none;
}
input:focus, textarea:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-bg); }
textarea { resize: vertical; min-height: 60px; line-height: 1.6; }
label.f { display: block; margin-bottom: 12px; }
label.f > span { display: block; font-size: 12.5px; color: var(--text2); margin-bottom: 4px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.row3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.btn { display: inline-flex; align-items: center; gap: 6px; border: 1px solid var(--border2); background: #fff; border-radius: 6px; padding: 7px 12px; cursor: pointer; white-space: nowrap; }
.btn:hover { background: var(--surface2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--danger); }
.btn.danger:hover { background: var(--danger-bg); }
.btn.sm { padding: 4px 9px; font-size: 12.5px; }
.btn.on { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }
kbd { font-family: inherit; font-size: 11px; border: 1px solid var(--border2); border-bottom-width: 2px; border-radius: 4px; padding: 0 5px; color: var(--text2); background: #fff; }
.topbar { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; gap: 12px; padding: 10px 20px; background: var(--surface); border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.sp { flex: 1; }
.badge { display: inline-block; font-size: 12px; padding: 2px 8px; border-radius: 999px; background: var(--surface2); color: var(--text2); border: 1px solid var(--border); }
.badge.open { background: var(--ok-bg); color: var(--ok); border-color: #bfe0c5; }
.badge.featured { background: #fff4d6; color: #8a5a00; border-color: #f0d48a; }
.badge.closed { background: var(--danger-bg); color: var(--danger); border-color: #f2c2c2; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 16px 18px; }
.muted { color: var(--muted); }
.text2 { color: var(--text2); }
.empty { padding: 40px; text-align: center; color: var(--muted); }

/* login */
.login { max-width: 360px; margin: 14vh auto; }
.login .card { padding: 26px; }

/* list */
.wrap { max-width: 1100px; margin: 0 auto; padding: 24px 20px 60px; }
.exam-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 14px; }
.exam-card h3 { margin: 6px 0 4px; font-size: 16px; }
.exam-card .meta { color: var(--text2); font-size: 13px; margin-bottom: 12px; }
.exam-card .acts { display: flex; gap: 6px; flex-wrap: wrap; }

/* editor */
.editor { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0; height: calc(100vh - 53px); }
.form { overflow: auto; padding: 18px 20px 80px; }
.form section { margin-bottom: 16px; }
.preview { border-left: 1px solid var(--border); display: flex; flex-direction: column; background: #d9d8d2; }
.pv-tabs { display: flex; gap: 6px; padding: 8px 12px; background: var(--surface); border-bottom: 1px solid var(--border); align-items: center; }
.preview iframe { flex: 1; border: 0; width: 100%; background: #d9d8d2; }
.qe { border: 1px solid var(--border); border-radius: 8px; padding: 12px; margin-bottom: 10px; background: var(--surface2); }
.qe-top { display: flex; gap: 8px; align-items: center; margin-bottom: 10px; flex-wrap: wrap; }
.qe-no { font-weight: 700; font-size: 15px; min-width: 32px; }
.qe-top select { width: auto; }
.qe-top input[type=number] { width: 80px; }
.choice-edit { display: grid; grid-template-columns: 26px 1fr; gap: 6px 8px; align-items: center; margin-bottom: 10px; }
.links .lk { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; }
.links .lk span { width: 92px; flex: none; color: var(--text2); font-size: 13px; }
.links .lk input { font-size: 12.5px; color: var(--text2); }
.cuts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.cuts label { font-size: 12px; color: var(--text2); }
.cuts small { display: block; color: var(--muted); font-size: 11.5px; margin-top: 2px; }
.dirty { color: #b26b00; font-size: 12.5px; }
.check { display: flex; gap: 8px; align-items: center; margin-bottom: 10px; cursor: pointer; }
.check input { width: auto; }

#toasts { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 99; display: grid; gap: 8px; }
.toast { background: #222; color: #fff; padding: 10px 18px; border-radius: 6px; font-size: 14px; transition: opacity .3s; }
.toast.err { background: var(--danger); }
.toast.out { opacity: 0; }

@media (max-width: 900px) {
  .editor { grid-template-columns: 1fr; height: auto; }
  .preview { height: 80vh; border-left: 0; border-top: 1px solid var(--border); }
  .cuts { grid-template-columns: repeat(2, 1fr); }
}