/* 색은 여기 :root 에서 한 번에 바꾼다 */
:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #1b2430;
  --muted: #5d6b7c;
  --line: #e2e6ec;
  --brand: #1f4fa3;
  --brand-soft: #e9effa;
  --grid: #8fc9e3;        /* 답안지와 비슷한 하늘색 칸 */
  --grid-strong: #3fa3cf;
  --ok: #1d7a4c;
  --ok-soft: #e5f4ec;
  --warn: #a35a00;
  --warn-soft: #fdf1e1;
  --err: #c0362c;
  --err-soft: #fbe9e7;
  --tip: #45607d;
  --tip-soft: #edf2f7;
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 var(--font);
}
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 16px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
button, select, input, textarea { font: inherit; color: inherit; }

/* 머리줄 */
.topbar { background: var(--card); border-bottom: 1px solid var(--line); }
.topbar-in { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark {
  display: inline-grid; place-items: center; width: 30px; height: 30px;
  border: 2px solid var(--grid-strong); color: var(--brand); font-size: 15px; border-radius: 4px;
}
.lang { display: flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.lang button { border: 0; background: none; padding: 6px 12px; cursor: pointer; font-size: 14px; color: var(--muted); }
.lang button[aria-pressed="true"] { background: var(--brand); color: #fff; }

/* 첫 화면 소개 */
.hero { padding: 28px 0 8px; }
.hero h1 { font-size: clamp(24px, 3.4vw, 34px); line-height: 1.25; margin: 0 0 8px; letter-spacing: -0.01em; }
.hero-sub { margin: 0 0 8px; color: var(--muted); max-width: 760px; }
.disclaimer { margin: 0; font-size: 13px; color: var(--muted); }

/* 문제 고르기 */
.setup { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin: 18px 0 14px; }
.tabs { display: flex; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 3px; }
.tabs button { border: 0; background: none; padding: 8px 14px; border-radius: 8px; cursor: pointer; font-weight: 600; color: var(--muted); }
.tabs button[aria-selected="true"] { background: var(--brand); color: #fff; }
.picker { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--muted); flex: 1 1 260px; }
.picker select {
  flex: 1; min-width: 0; padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--card); color: var(--ink);
}

/* 두 칸 배치 (휴대폰은 한 줄로) */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 16px; align-items: start; }
@media (max-width: 900px) { .layout { grid-template-columns: minmax(0, 1fr); } }
.col-left, .col-right { display: grid; gap: 16px; min-width: 0; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; }
.card h2 { font-size: 17px; margin: 0 0 10px; }

/* 문제 카드 */
.q-main { margin: 0 0 4px; font-weight: 600; }
.q-no {
  display: inline-block; min-width: 30px; margin-right: 8px; padding: 0 6px; border-radius: 6px;
  background: var(--brand-soft); color: var(--brand); text-align: center; font-size: 14px;
}
.q-sub { margin: 0 0 12px; font-size: 14px; color: var(--muted); }
.data { border: 1px solid var(--line); border-radius: 10px; padding: 14px; background: #fbfcfd; }
.data-cap { margin: 0 0 10px; font-weight: 600; font-size: 15px; }
.bars { display: grid; gap: 6px; margin-bottom: 12px; }
.bar-row { display: grid; grid-template-columns: 56px 1fr 72px; align-items: center; gap: 8px; font-size: 14px; }
.bar-track { height: 12px; background: var(--line); border-radius: 6px; overflow: hidden; }
.bar-val { display: block; height: 100%; background: var(--grid-strong); border-radius: 6px; }
.bar-num { text-align: right; font-variant-numeric: tabular-nums; }
.boxes { display: flex; flex-wrap: wrap; gap: 8px; }
.box { flex: 1 1 150px; border: 1px dashed var(--grid); border-radius: 8px; padding: 8px 10px; font-size: 14px; }
.box ul, .passage ul { margin: 4px 0 0; padding-left: 18px; }
.fictional { margin: 10px 0 0; font-size: 12px; color: var(--muted); }
.passage p { margin: 0 0 8px; }
.passage li { margin-bottom: 4px; }
.q-en { display: block; font-size: 13px; color: var(--muted); }

/* 답안 입력 */
.editor-label { display: block; font-weight: 700; margin-bottom: 6px; }
textarea {
  width: 100%; resize: vertical; min-height: 180px; padding: 12px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 17px; line-height: 1.7; background: #fff;
}
textarea:focus, select:focus, input:focus { outline: 2px solid var(--brand); outline-offset: 1px; }
.hint { margin: 6px 0 12px; font-size: 13px; color: var(--muted); }
.stats-row { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.stat-main { font-size: 15px; color: var(--muted); }
.stat-main b { font-size: 26px; color: var(--ink); font-variant-numeric: tabular-nums; }
.status { font-size: 13px; font-weight: 700; padding: 2px 10px; border-radius: 999px; }
.s-short { color: var(--warn); background: var(--warn-soft); }
.s-ok { color: var(--ok); background: var(--ok-soft); }
.s-over { color: var(--err); background: var(--err-soft); }
.s-none { padding: 0; }
.bar { position: relative; height: 8px; background: var(--line); border-radius: 4px; margin: 8px 0 6px; }
.bar-fill { height: 100%; border-radius: 4px; transition: width .15s; }
.bar-fill.s-short { background: #e3a54d; }
.bar-fill.s-ok { background: var(--ok); }
.bar-fill.s-over { background: var(--err); }
.bar-min { position: absolute; top: -3px; width: 2px; height: 14px; background: var(--ink); opacity: .45; }
.stats-sub { font-size: 13px; color: var(--muted); }
.editor-actions { margin-top: 10px; display: flex; justify-content: flex-end; }
.ghost { border: 1px solid var(--line); background: none; border-radius: 8px; padding: 6px 12px; cursor: pointer; font-size: 14px; color: var(--muted); }

/* 원고지 */
.sheet { padding: 14px; container-type: inline-size; }
.sheet-head { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.sheet-no { font-size: 22px; font-weight: 800; color: var(--grid-strong); }
.sheet-note { font-size: 13px; color: var(--muted); }
.grid {
  /* 칸 크기: 화면 폭에 맞춰 줄어든다 (25칸 + 눈금 자리) */
  --cell: min(22px, calc((100cqi - 30px) / 25));
  display: grid; justify-content: center; cursor: text; user-select: none;
}
.row { display: flex; align-items: center; margin-bottom: calc(var(--cell) * .18); }
.cell {
  width: var(--cell); height: var(--cell);
  border: 1px solid var(--grid); margin-left: -1px;
  display: inline-grid; place-items: center;
  font-size: calc(var(--cell) * .66); line-height: 1; color: #10243a;
  background: #fff;
}
.cell:first-child { margin-left: 0; }
.cell.pair { font-size: calc(var(--cell) * .44); letter-spacing: -0.04em; }
.cell.low { place-items: end start; padding: 0 0 calc(var(--cell) * .08) calc(var(--cell) * .2); }
.mark { width: 30px; padding-left: 4px; font-size: 10px; color: var(--grid-strong); font-variant-numeric: tabular-nums; }
.row.overflow .cell { border-color: #f0a29b; background: var(--err-soft); }
.cell.m-error { background: var(--err-soft); }
.cell.m-warn { background: var(--warn-soft); box-shadow: inset 0 -2px 0 var(--warn); }
.cell.m-tip { box-shadow: inset 0 -2px 0 #7f99b5; background: var(--tip-soft); }
.cell.m-info { box-shadow: inset 0 -2px 0 var(--ok); }
.cell.caret { outline: 2px solid var(--brand); outline-offset: -2px; position: relative; z-index: 1; }
.cell.composing-char { background: var(--brand-soft); text-decoration: underline; }

/* 점검 결과 */
#checkList { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
#checkList .empty, #checkList .good { font-size: 14px; color: var(--muted); }
#checkList .good { color: var(--ok); }
.chk { display: grid; grid-template-columns: 22px 1fr; gap: 10px; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line); }
.chk.jump { cursor: pointer; }
.chk.jump:hover, .chk.jump:focus { border-color: var(--brand); outline: none; }
.ico { width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; font-size: 13px; font-weight: 800; color: #fff; }
.l-error .ico { background: var(--err); }
.l-warn .ico { background: var(--warn); }
.l-tip .ico { background: var(--tip); }
.l-info .ico { background: var(--ok); }
.l-error { background: var(--err-soft); border-color: transparent; }
.l-warn { background: var(--warn-soft); border-color: transparent; }
.chk-title { margin: 0; font-weight: 700; font-size: 15px; }
.chk-body { margin: 2px 0 0; font-size: 14px; color: #3b4756; }
.count { font-weight: 600; color: var(--muted); font-size: 13px; }
.basis { display: inline-block; margin-left: 4px; font-size: 11px; font-weight: 600; padding: 1px 7px; border-radius: 999px; vertical-align: 2px; }
.b-official { background: var(--brand-soft); color: var(--brand); }
.b-convention { background: #eef0f3; color: var(--muted); }
.about { margin-top: 14px; font-size: 14px; color: #3b4756; }
.about summary { cursor: pointer; color: var(--brand); font-weight: 600; }
.about p { margin: 8px 0 0; }

/* 대기 신청 */
.waitlist { margin: 16px 0 0; background: linear-gradient(180deg, #fff, var(--brand-soft)); }
.waitlist p { margin: 0 0 12px; color: #3b4756; }
#wlForm { display: flex; gap: 8px; flex-wrap: wrap; max-width: 520px; }
#wlForm input { flex: 1 1 220px; min-width: 0; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
#wlForm button { padding: 10px 18px; border: 0; border-radius: 8px; background: var(--brand); color: #fff; font-weight: 700; cursor: pointer; }
#wlForm button:disabled { opacity: .6; }
.waitlist .privacy { margin: 8px 0 0; font-size: 12px; color: var(--muted); }
.wl-msg { margin: 6px 0 0; font-size: 14px; min-height: 1em; }
.wl-msg.good { color: var(--ok); }
.wl-msg.bad { color: var(--err); }

.footer { padding: 24px 16px 40px; font-size: 13px; color: var(--muted); }

@media (max-width: 520px) {
  .hero { padding-top: 20px; }
  .card { padding: 14px; }
  .tabs { width: 100%; }
  .tabs button { flex: 1; }
  .cell.low { place-items: end start; padding: 0 0 calc(var(--cell) * .08) calc(var(--cell) * .2); }
.mark { width: 22px; font-size: 8px; padding-left: 2px; }
  .grid { --cell: calc((100cqi - 22px) / 25); }
}