/* 수학문제 전용 스타일 — assets/site.css 를 먼저 불러온 뒤 함께 씁니다. */

/* 과목 목록 페이지 ---------------------------------------------- */
.course-section { margin-bottom: 30px; }

.course-section > h2 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 12px;
  font-size: 1.02rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.course-section > h2 .note {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0;
}

.subcard .count.ready { color: var(--accent); }

/* 과목 페이지 ---------------------------------------------------- */
.topic-nav {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.area-block { margin-bottom: 22px; }

.area-block > h2 {
  margin: 0 0 10px;
  font-size: 0.92rem;
  font-weight: 800;
  color: var(--ink-soft);
  letter-spacing: -0.01em;
}

.topic-btn {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--surface);
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.topic-btn:hover { border-color: var(--accent); transform: translateY(-2px); }
.topic-btn.current { border-color: var(--accent); background: var(--accent-soft); }
.topic-btn .t-name { font-size: 0.95rem; font-weight: 700; letter-spacing: -0.02em; }
.topic-btn .t-desc { font-size: 0.8rem; color: var(--muted); }
.topic-btn .t-score { margin-top: 4px; font-size: 0.76rem; font-weight: 700; color: var(--accent); }

/* 문제 풀이 패널 -------------------------------------------------- */
.panel {
  margin-top: 26px;
  padding: 24px 26px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  scroll-margin-top: 16px;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.panel-head h2 { margin: 0; font-size: 1.1rem; font-weight: 800; letter-spacing: -0.02em; }
.panel-head .where { margin: 2px 0 0; color: var(--muted); font-size: 0.82rem; font-weight: 600; }
.panel-head .score { color: var(--accent); font-size: 0.84rem; font-weight: 700; }

.concept {
  margin: 18px 0 6px;
  padding: 16px 18px;
  border-radius: 13px;
  background: var(--accent-soft);
  font-size: 0.9rem;
  color: var(--ink);
}

.concept h3 { margin: 0 0 6px; font-size: 0.84rem; font-weight: 800; color: var(--accent); }
.concept p { margin: 0 0 8px; color: var(--ink-soft); }
.concept p:last-child { margin-bottom: 0; }
.concept ul { margin: 0; padding-left: 1.2em; color: var(--ink-soft); }
.concept li { margin-bottom: 5px; }

.q-no { margin: 22px 0 6px; font-size: 0.8rem; font-weight: 700; color: var(--muted); }
.q-body { margin: 0 0 16px; font-size: 1.04rem; line-height: 1.75; }
.q-body p { margin: 0 0 8px; }
.q-body p:last-child { margin-bottom: 0; }

.q-table { border-collapse: collapse; margin: 10px 0; font-size: 0.9rem; }
.q-table th,
.q-table td { border: 1px solid var(--line); padding: 6px 12px; text-align: center; }
.q-table th { background: var(--accent-soft); font-weight: 700; }

.answer-row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }

.answer-row input[type="text"] {
  flex: 1 1 200px;
  min-width: 0;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-size: 0.98rem;
  font-weight: 700;
}

.answer-row input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.answer-row .unit { font-size: 0.92rem; font-weight: 700; color: var(--ink-soft); }

.choices { display: grid; gap: 9px; }

.choice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 11px 15px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--bg);
  font-size: 0.94rem;
  text-align: left;
  font-family: inherit;
  color: inherit;
  cursor: pointer;
}

.choice:hover { border-color: var(--accent); }
.choice.sel { border-color: var(--accent); background: var(--accent-soft); font-weight: 700; }
.choice .num { flex: none; font-weight: 800; color: var(--accent); }

.hint { margin: 8px 0 0; font-size: 0.8rem; color: var(--muted); }

.feedback {
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: 11px;
  font-size: 0.9rem;
  font-weight: 700;
}

.feedback.ok { background: #e4f3e0; color: #2f7a1f; }
.feedback.no { background: #fdeaea; color: #b23b3b; }
.feedback.warn { background: #fdf3e2; color: #a15c1f; }

.solution {
  margin-top: 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--bg);
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.solution h3 { margin: 0 0 8px; font-size: 0.82rem; font-weight: 800; color: var(--ink); }
.solution p { margin: 0 0 8px; }
.solution p:last-child { margin-bottom: 0; }
.solution ol { margin: 0; padding-left: 1.3em; }
.solution li { margin-bottom: 6px; }

.panel .btn-row { margin-top: 16px; }

.reset-link {
  margin-left: auto;
  background: none;
  border: none;
  padding: 0;
  color: var(--muted);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
}

.reset-link:hover { color: var(--accent); }

.notice {
  margin-top: 24px;
  padding: 18px 20px;
  border: 1px dashed #cfc8ea;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.6);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  .panel { padding: 20px 18px 22px; }
  .topic-nav { grid-template-columns: 1fr; }
}