/* ═══════════════════════════════════════════════════
   written_problems.css — 정보처리기사 필기 풀이
   레이아웃은 quiz-theory.css(.qt-*)를 그대로 차용.
   본 파일은 객관식 채점에 필요한 카드 내부 스타일만 정의.
   ═══════════════════════════════════════════════════ */

/* ─ 툴바 우측 액션 (셔플/초기화 묶음) ─ */
.qwp-toolbar-actions {
  display: flex; gap: 6px; flex-wrap: wrap;
}

:root {
  --qwp-confirm-accent: #0F766E;
  --qwp-confirm-accent-l: #E0F5F2;
}

/* Font parity with practical/theory quiz problem text */
.qwp-stem,
.qwp-choice,
.qwp-choice *,
.qwp-explain,
.qwp-explain * {
  font-family: "Pretendard Variable", Pretendard, "Noto Sans KR", sans-serif !important;
}

/* ─ 문제 카드 ─ */
.qwp-card {
  background: var(--qt-surface);
  border: 1.5px solid var(--qt-border);
  border-radius: var(--qt-r);
  padding: 1.25rem 1.4rem;
  margin-bottom: 10px;
  transition: border-color .15s, box-shadow .15s;
}
.qwp-card:hover { border-color: var(--qt-border2); box-shadow: var(--qt-shadow); }
.qwp-card.correct {
  border-color: #86EFAC;
  background: linear-gradient(180deg, #F7FDF9 0%, var(--qt-surface) 60%);
}
.qwp-card.incorrect {
  border-color: var(--qt-accent-m);
  background: linear-gradient(180deg, #FCF5F6 0%, var(--qt-surface) 60%);
}

/* ─ 카드 메타 (회차/과목/번호) ─ */
.qwp-card-meta {
  display: flex; align-items: center; gap: 7px;
  flex-wrap: wrap; margin-bottom: 12px;
}
.qwp-badge-subject {
  font-size: 11px; font-weight: 600;
  padding: 2px 9px; border-radius: var(--qt-r-sm);
  background: var(--_subj-bg, var(--qt-bg));
  color: var(--_subj-c, var(--qt-text2));
  white-space: nowrap;
}

/* ─ 문제 본문 ─ */
.qwp-stem {
  font-size: 15px; color: var(--qt-text);
  line-height: 1.85; margin-bottom: .9rem;
  white-space: pre-wrap;
}

/* ─ 코드 블록 / 이미지 ─ */
.qwp-code { margin: 0 0 .9rem; border-radius: 10px; overflow: hidden; }
.qwp-code pre {
  margin: 0; padding: 14px 16px; font-size: 13px;
  background: #F4F0EA; border: 1px solid var(--qt-border);
  border-left: 3px solid var(--qt-accent);
  border-radius: 0 10px 10px 0; overflow-x: auto;
}
.qwp-code code { font-family: 'JetBrains Mono', Consolas, Monaco, monospace !important; }

.qwp-image {
  max-width: 100%; border-radius: 10px;
  margin-bottom: .9rem; display: block;
}
.qwp-image-error {
  background: var(--qt-accent-l); color: var(--qt-accent);
  padding: .8rem; border-radius: 10px;
  text-align: center; font-size: 13px; margin-bottom: .9rem;
}

/* ─ 보기 (4지선다) ─ */
.qwp-choices { display: flex; flex-direction: column; gap: 8px; }
.qwp-choice {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 10px 14px; border-radius: 12px;
  border: 1.5px solid var(--qt-border);
  background: var(--qt-bg); color: var(--qt-text);
  font-size: 14px; line-height: 1.6;
  cursor: pointer; transition: background .15s, border-color .15s;
}
.qwp-choice:hover {
  background: var(--qt-accent-l);
  border-color: var(--qt-accent-m);
}
.qwp-choice.is-selected {
  background: var(--qwp-confirm-accent-l);
  border-color: var(--qwp-confirm-accent);
  font-weight: 600;
}
.qwp-choice.locked { cursor: default; pointer-events: none; }
.qwp-choice.selected-correct {
  background: #DCFCE7; border-color: #22C55E; color: #14532D; font-weight: 600;
}
.qwp-choice.selected-incorrect {
  background: var(--qt-accent-l); border-color: var(--qt-accent);
  color: var(--qt-accent); font-weight: 600;
}
.qwp-choice.answer-reveal {
  background: #ECFDF5; border-color: #10B981; color: #14532D; font-weight: 600;
}
.qwp-choice-num {
  display: inline-block; min-width: 22px;
  font-weight: 700; color: var(--qt-text3);
}
.qwp-choice.selected-correct .qwp-choice-num,
.qwp-choice.answer-reveal .qwp-choice-num { color: #15803D; }
.qwp-choice.selected-incorrect .qwp-choice-num { color: var(--qt-accent); }

/* ─ 채점 후 공개 영역 (해설/키워드/문의/리셋) ─ */
.qwp-reveal {
  display: none; margin-top: 1rem; padding-top: 1rem;
  border-top: 1.5px dashed var(--qt-border2);
}
.qwp-card.graded .qwp-reveal { display: block; }

.qwp-keywords { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: .7rem; }
.qwp-keyword {
  font-size: 11px; font-weight: 600;
  color: var(--qt-accent); background: var(--qt-accent-l);
  padding: 3px 9px; border-radius: 10px;
}

.qwp-explain {
  font-size: 13px; color: var(--qt-text2);
  line-height: 1.8; padding: .8rem 1rem;
  background: var(--qt-bg); border-radius: var(--qt-r-sm);
  border-left: 3px solid var(--qt-accent);
  margin-bottom: .7rem;
}
.qwp-explain img { max-width: 100%; border-radius: 6px; margin: .4rem 0; }

/* ─ 해설 내부 콘텐츠 (apply_round 가 주입하는 explain_html) ─ */
.qwp-explain h4 {
  font-size: 14px; font-weight: 700;
  color: var(--qt-text); margin: .8rem 0 .4rem;
}
.qwp-explain h4:first-child { margin-top: 0; }

.qwp-explain p { margin: .35rem 0; }

.qwp-explain ol,
.qwp-explain ul {
  margin: .35rem 0 .6rem; padding-left: 1.4rem;
}
.qwp-explain li { margin: .15rem 0; }

.qwp-explain code {
  font-family: Consolas, Monaco, "Courier New", monospace !important;
  font-size: 12.5px;
  background: var(--qt-accent-l);
  color: var(--qt-accent);
  padding: 1px 5px; border-radius: 4px;
}
.qwp-explain pre {
  background: #FAFAFA;
  border: 1px solid var(--qt-border);
  border-radius: var(--qt-r-sm);
  padding: .55rem .75rem;
  overflow-x: auto;
  margin: .5rem 0;
}
.qwp-explain pre code {
  background: transparent; color: var(--qt-text);
  padding: 0; font-size: 12.5px;
}

.qwp-explain .explain-table {
  border-collapse: collapse;
  width: 100%;
  margin: .5rem 0 .7rem;
  font-size: 12.5px;
  background: var(--qt-surface);
}
.qwp-explain .explain-table th,
.qwp-explain .explain-table td {
  border: 1px solid var(--qt-border2);
  padding: 6px 10px;
  text-align: left;
  vertical-align: top;
  line-height: 1.55;
}
.qwp-explain .explain-table th {
  background: var(--qt-accent-l);
  font-weight: 700;
  color: var(--qt-text);
}

.qwp-explain .tip {
  margin: .6rem 0 0;
  padding: .5rem .7rem;
  background: var(--qt-accent-l);
  border-left: 3px solid var(--qt-accent-m);
  border-radius: 0 6px 6px 0;
  font-size: 12.5px;
  color: var(--qt-text);
}

.qwp-variant-wrap { margin-bottom: .8rem; }
.qwp-variant-wrap .variant-q {
  white-space: normal;
}
.qwp-variant-choices {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: .75rem;
}
.qwp-variant-choice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1.5px solid #b2dfdb;
  background: #fff;
  color: var(--qt-text);
  font-size: 14px;
  line-height: 1.6;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.qwp-variant-choice:hover,
.qwp-variant-choice.is-selected {
  background: var(--qwp-confirm-accent-l);
  border-color: var(--qwp-confirm-accent);
}
.qwp-variant-choice.is-selected { font-weight: 600; }
.qwp-variant-choice.locked { cursor: default; pointer-events: none; }
.qwp-variant-choice.selected-correct {
  background: #DCFCE7;
  border-color: #22C55E;
  color: #14532D;
  font-weight: 600;
}
.qwp-variant-choice.selected-incorrect {
  background: var(--qt-accent-l);
  border-color: var(--qt-accent);
  color: var(--qt-accent);
  font-weight: 600;
}
.qwp-variant-choice.answer-reveal {
  background: #ECFDF5;
  border-color: #10B981;
  color: #14532D;
  font-weight: 600;
}
.qwp-variant-actions {
  display: flex;
  justify-content: flex-start;
  margin-top: .75rem;
}
.qwp-variant-explain {
  display: block;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1.5px dashed #b2dfdb;
}
.qwp-variant-explain .variant-ans-val {
  font-size: 14px;
  font-weight: 700;
  color: #186460;
  background: #c8eeec;
  border-radius: 6px;
  padding: 9px 13px;
  margin-bottom: 7px;
  line-height: 1.65;
}
.qwp-variant-explain .variant-keyword {
  font-size: 12px;
  color: var(--qt-text2);
  background: #f5fcfb;
  border-radius: 6px;
  padding: 8px 12px;
  line-height: 1.75;
}

.qwp-answer-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: .85rem;
  flex-wrap: wrap;
}

.qwp-check-actions {
  display: flex;
  justify-content: flex-start;
  margin-top: 0;
}
.qwp-btn-check {
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  background: var(--qwp-confirm-accent);
  border: 1px solid var(--qwp-confirm-accent);
  border-radius: 10px;
  padding: 8px 16px;
  cursor: pointer;
  transition: opacity .15s, transform .15s, box-shadow .15s;
}
.qwp-btn-check:not(:disabled):hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(15,118,110,.18);
}
.qwp-btn-check:disabled {
  cursor: not-allowed;
  opacity: .42;
}
.qwp-btn-check-reset {
  background: transparent;
  border-color: var(--qt-border);
  color: var(--qt-text3);
}
.qwp-btn-check-reset:not(:disabled):hover {
  background: var(--qt-bg);
  border-color: var(--qt-border2);
  color: var(--qt-text);
  box-shadow: 0 6px 16px rgba(0,0,0,.08);
}

/* ─ 반응형 ─ */
@media (max-width: 520px) {
  .qwp-card { padding: 1rem 1.1rem; }
  .qwp-stem { font-size: 14px; }
  .qwp-choice { font-size: 13.5px; padding: 9px 12px; }
  .qwp-explain { padding: .7rem .8rem; font-size: 12.5px; }
  .qwp-explain .explain-table { font-size: 11.5px; }
  .qwp-explain .explain-table th,
  .qwp-explain .explain-table td { padding: 5px 7px; }
}