:root {
  --bmw-blue: #1c69d4;
  --bmw-dark: #16213e;
  --ink: #1f2430;
  --muted: #6b7280;
  --line: #e3e7ee;
  --bg: #f4f6fa;
  --panel: #ffffff;
  --danger: #d93838;
  --ok: #1a8a4a;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(20, 30, 60, .08), 0 6px 20px rgba(20, 30, 60, .05);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Pretendard", -apple-system, "Segoe UI", "Malgun Gothic", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}
a { color: var(--bmw-blue); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 980px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); font-size: .9em; }
code { background: #eef1f6; padding: 1px 5px; border-radius: 5px; font-size: .9em; }

/* 상단바 */
.topbar {
  background: var(--bmw-dark);
  color: #fff;
  box-shadow: var(--shadow);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; height: 58px; }
.brand { color: #fff; font-weight: 700; font-size: 1.1rem; }
.brand:hover { text-decoration: none; opacity: .9; }
.topbar nav { display: flex; align-items: center; gap: 18px; }
.topbar nav a { color: #cdd6e6; font-size: .94rem; }
.topbar nav a:hover { color: #fff; text-decoration: none; }
.topbar .who { color: #8fa6cc; font-size: .88rem; }
.inline { display: inline; }
.link-btn { background: none; border: none; color: var(--bmw-blue); cursor: pointer; font: inherit; padding: 0; }
.link-btn:hover { text-decoration: underline; }
.link-btn.danger { color: var(--danger); }
.topbar .link-btn { color: #cdd6e6; }
.topbar .link-btn:hover { color: #fff; }

.content { padding: 26px 20px 60px; min-height: 70vh; }
.footer { color: var(--muted); padding: 20px; text-align: center; font-size: .85rem; }

/* 공통 요소 */
.page-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; flex-wrap: wrap; gap: 12px; }
h2 { font-size: 1.5rem; margin: 0; }
h3 { font-size: 1.1rem; margin: 0 0 12px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.panel-head { display: flex; justify-content: space-between; align-items: baseline; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.note-box { background: #fbfdff; border-style: dashed; }

/* 버튼 */
.btn {
  display: inline-block; border: 1px solid var(--line); background: #fff; color: var(--ink);
  padding: 9px 16px; border-radius: 9px; cursor: pointer; font-size: .94rem; font-weight: 600;
}
.btn:hover { text-decoration: none; border-color: #c7cfdc; }
.btn-primary { background: var(--bmw-blue); border-color: var(--bmw-blue); color: #fff; }
.btn-primary:hover { background: #1556b0; border-color: #1556b0; }
.btn-danger { background: #fff; border-color: #f0c4c4; color: var(--danger); }
.btn-danger:hover { background: #fdeeee; }

/* 표 */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); font-size: .94rem; }
.table th { color: var(--muted); font-weight: 600; font-size: .85rem; background: #fafbfd; }
.table tr:last-child td { border-bottom: none; }
.row-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

/* 플래시 */
.flashes { margin-bottom: 16px; display: flex; flex-direction: column; gap: 8px; }
.flash { padding: 11px 14px; border-radius: 9px; font-size: .92rem; border: 1px solid; }
.flash-success { background: #e9f8ef; border-color: #bce8cd; color: #14693a; }
.flash-danger  { background: #fdecec; border-color: #f5c2c2; color: #a52121; }
.flash-warning { background: #fff7e6; border-color: #ffe0a3; color: #8a5a00; }
.flash-info    { background: #eaf2fe; border-color: #c3dcfb; color: #14509e; }

/* 인증 박스 */
.auth-box { max-width: 380px; margin: 30px auto; background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.auth-box h2 { margin-bottom: 18px; }
.auth-box label, .stack label { display: block; margin-bottom: 14px; font-size: .9rem; font-weight: 600; color: #3a4151; }
.auth-box input, .stack input, .stack textarea {
  width: 100%; margin-top: 6px; padding: 10px 12px; border: 1px solid var(--line);
  border-radius: 8px; font-size: .95rem; font-weight: 400;
}
.stack textarea { resize: vertical; }
.login-options { display: flex; gap: 18px; margin: -4px 0 16px; flex-wrap: wrap; }
.login-options .chk { display: flex; align-items: center; gap: 6px; margin: 0; font-size: .88rem; font-weight: 400; color: #3a4151; cursor: pointer; }
.login-options .chk input { width: auto; margin: 0; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--bmw-blue); box-shadow: 0 0 0 3px rgba(28,105,212,.12); }

/* 랜딩 */
.hero { text-align: center; padding: 40px 0 26px; }
.hero h1 { font-size: 2.1rem; margin: 0 0 12px; }
.hero p { color: var(--muted); max-width: 560px; margin: 0 auto 22px; }
.hero-actions { display: flex; gap: 12px; justify-content: center; }
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.card h3 { color: var(--bmw-blue); }
.card p { margin: 0; color: var(--muted); font-size: .92rem; }

/* 대시보드 통계 */
.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 20px; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px;
  box-shadow: var(--shadow); display: flex; flex-direction: column; }
.stat .num { font-size: 2rem; font-weight: 700; color: var(--bmw-blue); }
.stat .lbl { color: var(--muted); font-size: .9rem; }

/* 시험지 만들기 폼 */
.form-grid { display: flex; flex-direction: column; gap: 22px; }
.field-label { display: block; font-weight: 700; margin-bottom: 10px; color: #2a3142; }
.form-grid select, .num-input, .text-input {
  padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; font-size: .95rem;
}
.form-grid select { width: 100%; }
.text-input { width: 100%; }
.num-input { width: 90px; text-align: center; }
.range-row { display: flex; align-items: center; gap: 10px; margin: 8px 0; }
.guide { background: #eef4ff; border: 1px solid #d3e2ff; color: #1c4ea0; padding: 9px 12px;
  border-radius: 8px; font-size: .9rem; }
.guide-info { background: #f0fbf4; border-color: #c5ecd3; color: #14693a; margin-top: 8px; }
.radio-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.radio-card { border: 1.5px solid var(--line); border-radius: 10px; padding: 14px; cursor: pointer; display: block; }
.radio-card input { margin-right: 6px; }
.radio-card:has(input:checked) { border-color: var(--bmw-blue); background: #f5f9ff; }
.rc-title { font-weight: 700; display: inline; }
.rc-desc { display: block; color: var(--muted); font-size: .88rem; margin-top: 6px; }
.form-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }

/* 관리자 */
.nav-admin { color: #ffd166 !important; font-weight: 700; }
.nav-admin:hover { color: #ffde8a !important; }
.admin-nav { margin-bottom: 18px; }
.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: .78rem; font-weight: 700; }
.badge-admin { background: #fff3d6; color: #8a5a00; border: 1px solid #ffe0a3; }

/* 세그먼트 / 툴바 */
.toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 18px; flex-wrap: wrap; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
.seg-btn { padding: 8px 16px; background: #fff; color: var(--ink); font-weight: 600; font-size: .9rem; }
.seg-btn:hover { text-decoration: none; background: #f3f6fb; }
.seg-btn.active { background: var(--bmw-blue); color: #fff; }

/* ============ 시험지 (화면 + 인쇄) ============ */
.paper {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 32px 34px; max-width: 820px; margin: 0 auto;
}
.paper-head { border-bottom: 2px solid var(--ink); padding-bottom: 14px; margin-bottom: 18px; }
.paper-head h1 { font-size: 1.5rem; margin: 0 0 10px; }
.answer-badge { color: var(--danger); font-size: 1rem; }
.paper-meta { display: flex; flex-wrap: wrap; gap: 14px; color: var(--muted); font-size: .88rem; margin-bottom: 8px; }
.paper-fields { display: flex; flex-wrap: wrap; gap: 22px; font-size: .95rem; }

.qlist { margin: 0; padding: 0; columns: 2; column-gap: 34px; counter-reset: q; list-style: none; }
.qitem {
  break-inside: avoid; padding: 7px 0; border-bottom: 1px dotted #d7dce6;
  display: flex; align-items: baseline; gap: 8px; counter-increment: q;
}
.qitem::before {
  content: counter(q) ". "; color: var(--muted); font-weight: 700; min-width: 26px;
  font-variant-numeric: tabular-nums;
}
.q-prompt { font-weight: 600; }
.q-blank { flex: 1; border-bottom: 1px solid #b9c0cd; min-width: 80px; align-self: stretch; }
.qlist-answer .q-prompt { font-weight: 600; }
.q-answer { color: var(--bmw-blue); font-weight: 600; }
.q-answer::before { content: "→ "; color: var(--muted); }

@media (max-width: 720px) {
  .two-col, .cards, .radio-cards, .stat-row { grid-template-columns: 1fr; }
  .qlist { columns: 1; }
  .topbar nav { gap: 10px; font-size: .85rem; flex-wrap: wrap; }
}

/* ============ 시험지 표 양식 (참고 양식 기반) ============ */
.sheet-paper { padding: 16px 18px; max-width: 900px; }
.title-table, .fields-table, .qgrid { width: 100%; border-collapse: collapse; }
.title-table { margin-bottom: 6px; }
.title-cell {
  background: #dcdcdc; border: 1.5px solid #555; text-align: center;
  font-weight: 800; font-size: 1.2rem; padding: 11px 8px; letter-spacing: .3px;
}
.title-cell .answer-badge { color: var(--danger); font-size: .8em; font-weight: 700; }
.fields-table { margin-bottom: 4px; table-layout: fixed; }
.fields-table td { border: 1.5px solid #555; padding: 8px 10px; font-size: .95rem; overflow: hidden; }
.fields-table .label { background: #ececec; font-weight: 700; text-align: center; white-space: nowrap; }
.fields-table .value { background: #fff; }
.fields-table .score { text-align: right; color: #555; }
.sheet-meta { font-size: .8rem; color: var(--muted); margin: 4px 2px 8px; text-align: right; }

.qgrid { table-layout: fixed; }
.qgrid col.c-no { width: 7%; }
.qgrid col.c-word { width: 18.5%; }
.qgrid col.c-ans { width: 24.5%; }
.qgrid th { background: #ececec; border: 1.2px solid #777; text-align: center; padding: 5px 4px; font-size: .85rem; }
.qgrid td { border: 1.2px solid #9aa0aa; padding: 4px 7px; font-size: .92rem; }
.qgrid td.no { text-align: center; color: #555; font-variant-numeric: tabular-nums; }
.qgrid td.word { text-align: center; font-weight: 600; word-break: break-word; }
.qgrid .ans-val { color: var(--bmw-blue); font-weight: 600; }
.qgrid td.mid, .qgrid th.mid { border-left: 2.4px solid #555; }

/* ============ 인쇄 전용 ============ */
@media print {
  @page { size: A4; margin: 12mm; }
  body { background: #fff; }
  .no-print { display: none !important; }
  .content { padding: 0; min-height: 0; }
  .paper, .sheet-paper { border: none; box-shadow: none; border-radius: 0; padding: 0; max-width: none; margin: 0; }
  .title-cell { font-size: 13pt; padding: 6px 6px; }
  .fields-table td { padding: 4px 7px; font-size: 9pt; }
  .sheet-meta { font-size: 7.5pt; margin: 3px 1px 5px; }
  .qgrid th { font-size: 8.4pt; padding: 2px 3px; }
  .qgrid td { font-size: 9pt; padding: 2.3px 5px; height: 5.4mm; }
  .qgrid .ans-val { color: #000; }
  a { color: #000; text-decoration: none; }
}