/* =====================================================
   세계시민과 지리 학습지 — v17
   · 전역: 지리 테마(아이보리/딥블루/에메랄드/테라코타)
   · .board 영역에만 칠판 테마 적용
   ===================================================== */
:root {
  /* Geography theme */
  --bg-page: #f4ece0;          /* 옅은 종이/지도 베이지 */
  --bg-paper: #fbf7ef;
  --ink: #1f2d3a;              /* 본문 진회색 */
  --ink-sub: #5a6673;
  --ocean: #0b3d5c;            /* 딥 블루 (바다) */
  --ocean-2: #155077;
  --land: #2d7a5f;             /* 에메랄드 (대륙) */
  --land-2: #3c9374;
  --terra: #c86a3e;            /* 테라코타 (지도 포인트) */
  --terra-2: #e08556;
  --sun: #e3a42b;              /* 금빛 */
  --line: #d9cdb8;             /* 종이지도 경계선 */
  --shadow: 0 6px 20px rgba(11,61,92,0.10);
  --shadow-soft: 0 2px 8px rgba(11,61,92,0.08);

  /* Chalkboard theme (board 전용) */
  --chalk-bg: #1f4a34;
  --chalk-bg-2: #18392a;
  --frame: #6e4a28;
  --chalk: #f3f0e4;
  --chalk-yellow: #ffd860;
  --chalk-blue: #8fd1ff;
  --chalk-pink: #ffc6e2;
  --chalk-green: #8fe6b0;
  --chalk-red: #ff9e9e;
  --chalk-dim: #b9c8bd;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: Pretendard, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
  color: var(--ink);
  min-height: 100vh;
  padding: 20px 16px 40px;
  background-color: var(--bg-page);
  /* 옅은 위도/경도 그리드 */
  background-image:
    linear-gradient(rgba(11,61,92,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11,61,92,0.06) 1px, transparent 1px),
    radial-gradient(circle at 15% 10%, rgba(200,106,62,0.08), transparent 40%),
    radial-gradient(circle at 85% 90%, rgba(45,122,95,0.08), transparent 45%);
  background-size: 44px 44px, 44px 44px, auto, auto;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  background: var(--bg-paper);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 22px 26px 28px;
  position: relative;
  border: 1px solid var(--line);
}

/* ===== Header / Brand ===== */
.topbar {
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--line);
  position: relative;
}
.topbar::after {
  /* 얇은 포인트 라인 (지도 경선처럼) */
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: linear-gradient(90deg, var(--ocean) 0%, var(--land) 40%, var(--terra) 70%, var(--sun) 100%);
  border-radius: 2px;
  opacity: 0.7;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.brand-globe {
  font-size: 32px;
  line-height: 1;
  filter: drop-shadow(0 2px 3px rgba(0,0,0,0.15));
  flex-shrink: 0;
}
.brand-text { min-width: 0; flex: 1; }
.topbar h1 {
  margin: 0;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--ocean);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: clamp(17px, 4.6vw, 24px);
}
.brand-sub {
  margin: 2px 0 0;
  font-size: 11.5px;
  color: var(--ink-sub);
  letter-spacing: 0.03em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== Tabs: 여권 스탬프 느낌 ===== */
.tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.tab {
  background: transparent;
  color: var(--ink-sub);
  border: 1.5px solid var(--line);
  border-radius: 999px;
  padding: 8px 16px;
  cursor: pointer;
  font-size: 13.5px;
  font-family: inherit;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.18s ease;
}
.tab .tab-icon { font-size: 15px; line-height: 1; }
.tab:hover {
  color: var(--ocean);
  border-color: var(--ocean);
  background: rgba(11,61,92,0.04);
}
.tab.active {
  background: var(--ocean);
  color: #fff;
  border-color: var(--ocean);
  box-shadow: var(--shadow-soft);
}

/* ===== Controls ===== */
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: flex-end;
  padding: 14px 0 16px;
  border-bottom: 1px dashed var(--line);
  margin-bottom: 14px;
}
.controls label {
  display: flex;
  flex-direction: column;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink-sub);
  letter-spacing: 0.02em;
  text-transform: uppercase;
  gap: 4px;
}
select, input[type="number"] {
  background: #fff;
  color: var(--ink);
  border: 1.5px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  font-family: inherit;
  font-size: 14px;
  min-width: 140px;
  transition: border-color 0.15s;
}
select:focus, input[type="number"]:focus {
  outline: none;
  border-color: var(--ocean);
  box-shadow: 0 0 0 3px rgba(11,61,92,0.1);
}
select:disabled, input:disabled { opacity: 0.55; cursor: not-allowed; }
input[type="number"] { min-width: 80px; }

/* ===== Buttons ===== */
.nav-btns {
  display: flex;
  gap: 6px;
  margin-left: auto;
  flex-wrap: nowrap;
}
.btn {
  background: #fff;
  color: var(--ink);
  border: 1.5px solid var(--line);
  border-radius: 8px;
  padding: 8px 16px;
  cursor: pointer;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.15s ease;
}
.btn:hover:not(:disabled) {
  border-color: var(--ocean);
  color: var(--ocean);
  background: rgba(11,61,92,0.04);
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary {
  background: var(--ocean);
  border-color: var(--ocean);
  color: #fff;
}
.btn-primary:hover:not(:disabled) {
  background: var(--ocean-2);
  border-color: var(--ocean-2);
  color: #fff;
}
.btn-ghost {
  background: transparent;
  border-color: var(--terra);
  color: var(--terra);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--terra);
  color: #fff;
  border-color: var(--terra);
}

/* ===== Attack status chips ===== */
.attack-status {
  display: flex;
  gap: 8px;
  margin-left: auto;
}
.status-chip {
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.03em;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.status-time {
  background: rgba(11,61,92,0.08);
  color: var(--ocean);
  border: 1.5px solid rgba(11,61,92,0.25);
}
.status-score {
  background: rgba(227,164,43,0.15);
  color: #8a5e10;
  border: 1.5px solid rgba(227,164,43,0.5);
}

/* =====================================================
   BOARD — 칠판 테마 (학습 콘텐츠 영역만)
   ===================================================== */
.board {
  min-height: 320px;
  padding: 22px 24px 26px;
  font-size: 16px;
  line-height: 2.0;
  background: linear-gradient(180deg, var(--chalk-bg), var(--chalk-bg-2));
  border: 10px solid var(--frame);
  border-radius: 12px;
  color: var(--chalk);
  box-shadow:
    0 8px 24px rgba(0,0,0,0.25),
    inset 0 0 50px rgba(0,0,0,0.28);
  position: relative;
  /* 분필가루 느낌 은은한 노이즈 */
  background-image:
    radial-gradient(circle at 15% 20%, rgba(255,255,255,0.03), transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(255,255,255,0.025), transparent 45%),
    linear-gradient(180deg, var(--chalk-bg), var(--chalk-bg-2));
}
.board + .board { margin-top: 16px; }
.hidden { display: none !important; }

/* ===== Hierarchy titles inside board ===== */
.chapter-title {
  color: var(--chalk-yellow);
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 6px;
  text-shadow: 0 1px 0 rgba(0,0,0,0.4);
}
.sub-title {
  color: var(--chalk-blue);
  font-weight: 600;
  font-size: 17px;
  margin: 14px 0 8px;
}

/* ===== Content lines ===== */
.detail-line {
  margin: 5px 0;
  position: relative;
}
.detail-line.level-detail { padding-left: 0.3em; color: var(--chalk); }
.detail-line.level-item   { padding-left: 2.2em; color: var(--chalk); }
.detail-line.level-dash   { padding-left: 3.8em; color: var(--chalk-dim); font-size: 15px; }

/* ===== Blank input ===== */
.blank-wrap {
  position: relative;
  display: inline-block;
  margin: 0 2px;
  vertical-align: baseline;
}
input.blank {
  background: rgba(0,0,0,0.35);
  color: var(--chalk-yellow);
  border: none;
  border-bottom: 2px solid var(--chalk-yellow);
  font-family: inherit;
  font-size: 15px;
  padding: 2px 18px 2px 6px;
  text-align: center;
  outline: none;
  box-sizing: border-box;
  transition: color 0.12s, border-bottom-color 0.12s;
}
input.blank:focus { border-bottom-color: var(--chalk-blue); }
input.blank.correct { color: var(--chalk-green); border-bottom-color: var(--chalk-green); }
input.blank.wrong   { color: var(--chalk-red);   border-bottom-color: var(--chalk-red); }
.blank-wrap::after {
  content: "✓";
  position: absolute;
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--chalk-green);
  font-size: 12px;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease-out;
}
.blank-wrap.correct::after { opacity: 1; }

/* ===== Feedback flash (타임어택) ===== */
.flash {
  position: fixed;
  top: 30%;
  left: 50%;
  transform: translateX(-50%);
  padding: 18px 32px;
  border-radius: 12px;
  font-size: 28px;
  font-weight: 700;
  pointer-events: none;
  z-index: 100;
}
.flash.correct { background: rgba(45,122,95,0.95);  color: #fff; border: 2px solid var(--land-2); box-shadow: var(--shadow); }
.flash.wrong   { background: rgba(200,106,62,0.95); color: #fff; border: 2px solid var(--terra-2); box-shadow: var(--shadow); }

/* ===== Result summary & items (칠판 안에서 표시) ===== */
.result-summary {
  background: rgba(0,0,0,0.25);
  border: 1px solid rgba(243,240,228,0.2);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 14px;
  font-size: 15px;
  color: var(--chalk);
}
.result-item {
  background: rgba(0,0,0,0.15);
  border-left: 3px solid var(--chalk-dim);
  padding: 10px 14px;
  margin: 8px 0;
  border-radius: 4px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--chalk);
}
.result-item.correct { border-left-color: var(--chalk-green); }
.result-item.wrong   { border-left-color: var(--chalk-red); }
.result-item .qpath  { color: var(--chalk-dim); font-size: 12px; margin-bottom: 4px; }
.result-item .ans-correct { color: var(--chalk-green); font-weight: 600; }
.result-item .ans-wrong   { color: var(--chalk-red); text-decoration: line-through; margin-right: 4px; }

/* In-board action button (다음 문제 / 결과 보기 등) */
.board-action-btn {
  margin-top: 16px;
  background: var(--chalk-yellow);
  color: #3a2d0b;
  border: none;
  border-radius: 8px;
  padding: 10px 22px;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3);
  transition: transform 0.12s, box-shadow 0.12s;
}
.board-action-btn:hover { box-shadow: 0 3px 10px rgba(0,0,0,0.4); }

/* ===== Watermark ===== */
.watermark {
  position: fixed;
  right: 18px;
  bottom: 12px;
  font-size: 12px;
  color: rgba(11,61,92,0.35);
  pointer-events: none;
  z-index: 5;
  user-select: none;
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* ===== Mobile ===== */
@media (max-width: 640px) {
  body { padding: 12px 8px 40px; }
  .app { padding: 16px 14px 24px; border-radius: 12px; }

  .brand { gap: 10px; }
  .brand-globe { font-size: 26px; }
  .topbar h1 { font-size: clamp(15px, 5vw, 20px); }
  .brand-sub { font-size: 10.5px; }

  .tabs { gap: 6px; }
  .tab { padding: 7px 12px; font-size: 12.5px; }
  .tab .tab-icon { font-size: 13px; }

  .controls { gap: 8px 10px; }
  .controls label { font-size: 10.5px; width: 100%; }
  select, input[type="number"] { min-width: 0; width: 100%; font-size: 14px; }

  .nav-btns {
    width: 100%;
    margin-left: 0;
    justify-content: space-between;
    gap: 4px;
  }
  .btn-compact {
    flex: 1 1 auto;
    min-width: 0;
    padding: 9px 6px !important;
    font-size: 12.5px !important;
  }
  .attack-status {
    width: 100%;
    margin-left: 0;
    justify-content: flex-start;
  }
  .status-chip { padding: 6px 10px; font-size: 13px; }

  .board {
    padding: 16px 14px 20px;
    border-width: 7px;
    font-size: 15px;
    line-height: 1.95;
  }
  .detail-line.level-item { padding-left: 1.8em; }
  .detail-line.level-dash { padding-left: 3.2em; }

  input.blank { font-size: 14.5px; padding: 2px 16px 2px 5px; }
  .blank-wrap::after { right: 3px; font-size: 11px; }

  .chapter-title { font-size: 16px; }
  .sub-title { font-size: 15px; }
}

@media (max-width: 380px) {
  .btn-compact { padding: 7px 4px !important; font-size: 11.5px !important; }
  .tab { padding: 6px 10px; }
  .brand-sub { display: none; }
}

/* No shake, no pop, no scale anywhere — stable layout */


/* ===== v20 타임어택 비활성 빈칸: 정답 텍스트를 또렷하게 노출 ===== */
.blank-context {
  color: var(--chalk-cream, #f5efd8);
  opacity: 1;
  font-weight: 500;
  /* 문장 흐름 그대로. 밑줄/배경 없음 */
}

/* ===== v19 모바일 줄 이탈 방지 (유지) ===== */
.blank-wrap {
  display: inline-block;
  position: relative;
  white-space: nowrap;
  vertical-align: baseline;
  contain: layout;
  line-height: 1.3;
}

input.blank {
  font-size: 16px !important;  /* iOS Safari auto-zoom 차단 */
  line-height: 1.3;
  vertical-align: baseline;
  opacity: 1 !important;
  -webkit-text-fill-color: var(--chalk-yellow);
  overflow: hidden;
  box-sizing: border-box;
}

input.blank.correct {
  -webkit-text-fill-color: var(--chalk-green, #9be7a8);
}
input.blank.wrong {
  -webkit-text-fill-color: var(--chalk-pink, #ff9aa6);
}