/* ═══════════════════════════════════════════════════════════
   산업안전지도사(전기) 3차 면접 대비 – 듀오링고 스타일
   ═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;600;700;800;900&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* 브랜드 컬러 */
  --duo-green:   #58cc02;
  --duo-green-d: #46a302;
  --duo-green-l: #d7f8a0;
  --duo-blue:    #1cb0f6;
  --duo-blue-d:  #0e9fd8;
  --duo-blue-l:  #ddf4fe;
  --duo-red:     #ff4b4b;
  --duo-red-l:   #ffd7d7;
  --duo-yellow:  #ffc800;
  --duo-yellow-l:#fff3b0;
  --duo-purple:  #ce82ff;
  --duo-purple-l:#f0d9ff;
  --duo-orange:  #ff9600;
  --duo-orange-l:#ffe5b0;

  /* 중립 */
  --white:    #ffffff;
  --gray-50:  #f7f7f7;
  --gray-100: #eeeeee;
  --gray-200: #e5e5e5;
  --gray-300: #afafaf;
  --gray-500: #777777;
  --gray-700: #4b4b4b;
  --gray-900: #1c1c1c;

  /* 타이포 */
  --font: 'Noto Sans KR', sans-serif;
  --radius-xl: 20px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;

  /* 카테고리 컬러 */
  --cat0: #4f46e5; --cat0-l: #eef2ff;
  --cat1: #0891b2; --cat1-l: #ecfeff;
  --cat2: #d97706; --cat2-l: #fffbeb;
  --cat3: #7c3aed; --cat3-l: #f5f3ff;
  --cat4: #dc2626; --cat4-l: #fef2f2;
  --cat5: #0d9488; --cat5-l: #f0fdfa;
  --cat6: #db2777; --cat6-l: #fdf4ff;
  --cat7: #16a34a; --cat7-l: #f0fdf4;
}

/* ── 기본 ────────────────────────────────────────────────── */
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: #f0f4f8;
  color: var(--gray-900);
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.5;
}

/* ── 앱 헤더 ─────────────────────────────────────────────── */
.app-header {
  background: var(--white);
  border-bottom: 3px solid var(--duo-green);
  padding: 0 16px;
  position: sticky; top: 0; z-index: 200;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
}
.header-inner {
  max-width: 720px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
.header-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.1rem; font-weight: 900; color: var(--duo-green);
  text-decoration: none;
}
.header-logo .logo-icon {
  width: 36px; height: 36px;
  background: var(--duo-green);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  box-shadow: 0 3px 0 var(--duo-green-d);
}
.header-streak {
  display: flex; align-items: center; gap: 6px;
  background: var(--duo-yellow-l); border-radius: 20px; padding: 6px 14px;
  font-size: .82rem; font-weight: 700; color: var(--duo-orange);
}

/* ── 탭 네비 ─────────────────────────────────────────────── */
.tab-nav {
  background: var(--white);
  border-bottom: 2px solid var(--gray-200);
  display: flex; overflow-x: auto;
  max-width: 720px; margin: 0 auto;
  position: sticky; top: 59px; z-index: 190;
  box-shadow: 0 2px 4px rgba(0,0,0,.04);
}
.tab-btn {
  flex: 1; min-width: 70px; padding: 12px 8px 10px;
  border: none; background: none; cursor: pointer;
  font-family: var(--font); font-size: .72rem; font-weight: 600;
  color: var(--gray-300);
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  border-bottom: 3px solid transparent; margin-bottom: -2px;
  transition: all .18s ease;
  position: relative;
}
.tab-btn .tab-icon { font-size: 1.1rem; }
.tab-btn:hover { color: var(--gray-700); }
.tab-btn.active { color: var(--duo-green); border-bottom-color: var(--duo-green); }
.tab-badge {
  position: absolute; top: 6px; right: 8px;
  background: var(--duo-red); color: white;
  border-radius: 10px; padding: 1px 6px;
  font-size: .62rem; font-weight: 800;
}

/* ── 탭 콘텐츠 ───────────────────────────────────────────── */
.tab-content {
  display: none;
  max-width: 720px; margin: 0 auto;
  padding: 16px 16px 80px;
}
.tab-content.active { display: block; }

/* ── 유틸 ───────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ── 섹션 타이틀 ─────────────────────────────────────────── */
.section-title {
  font-size: 1.1rem; font-weight: 800; color: var(--gray-900);
  margin-bottom: 16px;
  display: flex; align-items: center; gap: 8px;
}
.section-title .title-icon {
  width: 34px; height: 34px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
}

/* ── 카드 (공통) ─────────────────────────────────────────── */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 0 var(--gray-200), 0 1px 8px rgba(0,0,0,.06);
  margin-bottom: 12px;
  overflow: hidden;
  transition: transform .15s, box-shadow .15s;
}
.card:active { transform: translateY(1px); box-shadow: 0 1px 0 var(--gray-200); }

/* ── 버튼 (공통) ─────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: var(--radius-md);
  border: none; cursor: pointer;
  font-family: var(--font); font-size: .9rem; font-weight: 700;
  transition: all .15s ease;
  text-decoration: none;
}
.btn:active { transform: translateY(2px); }

.btn-primary {
  background: var(--duo-green); color: white;
  box-shadow: 0 4px 0 var(--duo-green-d);
}
.btn-primary:hover { background: #63e000; }
.btn-primary:active { box-shadow: 0 1px 0 var(--duo-green-d); }

.btn-secondary {
  background: var(--white); color: var(--duo-blue);
  border: 2px solid var(--duo-blue);
  box-shadow: 0 4px 0 #0a8fc0;
}
.btn-secondary:hover { background: var(--duo-blue-l); }
.btn-secondary:active { box-shadow: 0 1px 0 #0a8fc0; }

.btn-danger {
  background: var(--duo-red); color: white;
  box-shadow: 0 4px 0 #cc2a2a;
}
.btn-danger:active { box-shadow: 0 1px 0 #cc2a2a; }

.btn-ghost {
  background: transparent; color: var(--gray-500);
  border: 2px solid var(--gray-200);
}
.btn-ghost:hover { background: var(--gray-50); }

.btn-sm { padding: 8px 16px; font-size: .8rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 16px 32px; font-size: 1rem; border-radius: var(--radius-lg); width: 100%; }

/* ── 진행바 ─────────────────────────────────────────────── */
.progress-header {
  display: flex; align-items: center; gap: 12px; margin-bottom: 20px;
}
.progress-bar-wrap {
  flex: 1; height: 16px; background: var(--gray-200);
  border-radius: 8px; overflow: hidden;
}
.progress-bar {
  height: 100%; border-radius: 8px;
  background: linear-gradient(90deg, var(--duo-green), #63e000);
  transition: width .4s cubic-bezier(.34,1.56,.64,1);
  position: relative;
}
.progress-bar::after {
  content: '';
  position: absolute; right: 0; top: 0; bottom: 0;
  width: 8px;
  background: rgba(255,255,255,.4);
  border-radius: 0 8px 8px 0;
}
.progress-text {
  font-size: .82rem; font-weight: 700; color: var(--gray-500);
  min-width: 50px; text-align: right;
}
.xp-badge {
  background: var(--duo-yellow-l); color: var(--duo-orange);
  border-radius: 20px; padding: 4px 12px;
  font-size: .8rem; font-weight: 700;
}

/* ════════════════════════════════════════════════════════════
   탭 1: 핵심정리
════════════════════════════════════════════════════════════ */
.summary-filter {
  display: flex; gap: 8px; overflow-x: auto; padding-bottom: 8px; margin-bottom: 12px;
}
.summary-filter::-webkit-scrollbar { height: 3px; }
.summary-filter::-webkit-scrollbar-thumb { background: var(--gray-200); border-radius: 2px; }
.filter-chip {
  flex-shrink: 0;
  padding: 7px 14px; border-radius: 20px;
  border: 2px solid var(--gray-200); background: var(--white);
  font-family: var(--font); font-size: .8rem; font-weight: 600; color: var(--gray-500);
  cursor: pointer; transition: all .15s;
}
.filter-chip:hover { border-color: var(--duo-blue); color: var(--duo-blue); }
.filter-chip.active { background: var(--duo-blue); color: white; border-color: var(--duo-blue); }

.search-wrap {
  position: relative; margin-bottom: 14px;
}
.search-wrap input {
  width: 100%; padding: 12px 16px 12px 44px;
  border: 2px solid var(--gray-200); border-radius: var(--radius-md);
  font-family: var(--font); font-size: .9rem; outline: none;
  transition: border-color .15s;
  background: var(--white);
}
.search-wrap input:focus { border-color: var(--duo-blue); }
.search-wrap .search-icon {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--gray-300); font-size: .95rem;
}

/* 아코디언 카드 */
.acc-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  margin-bottom: 10px;
  border: 2px solid var(--gray-200);
  overflow: hidden;
  transition: border-color .15s;
}
.acc-card:hover { border-color: var(--duo-blue); }
.acc-card.open { border-color: var(--duo-blue); }

.acc-header {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 16px; cursor: pointer; user-select: none;
}
.acc-num-badge {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 800; color: white; flex-shrink: 0;
}
.acc-info { flex: 1; min-width: 0; }
.acc-cat-label {
  font-size: .7rem; font-weight: 700; letter-spacing: .5px;
  text-transform: uppercase; margin-bottom: 3px;
}
.acc-q-text {
  font-size: .9rem; font-weight: 600; color: var(--gray-900);
  line-height: 1.5;
}
.acc-chevron { color: var(--gray-300); transition: transform .2s; flex-shrink: 0; }
.acc-card.open .acc-chevron { transform: rotate(180deg); color: var(--duo-blue); }

.acc-body { display: none; padding: 0 16px 16px; }
.acc-card.open .acc-body { display: block; }
.acc-answer-box {
  background: var(--gray-50); border-radius: var(--radius-md);
  padding: 14px; border-left: 4px solid var(--duo-blue);
  font-size: .88rem; color: var(--gray-700); line-height: 1.8;
  white-space: pre-wrap; margin-bottom: 10px;
}
.kw-row { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.kw-pill {
  background: var(--duo-blue-l); color: var(--duo-blue-d);
  border-radius: 20px; padding: 3px 11px;
  font-size: .75rem; font-weight: 700;
}

/* ════════════════════════════════════════════════════════════
   탭 2: 기출테스트 셋업
════════════════════════════════════════════════════════════ */
.setup-hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  border-radius: var(--radius-xl);
  padding: 24px 20px;
  margin-bottom: 16px;
  color: white; text-align: center;
}
.setup-hero .hero-owl { font-size: 3rem; margin-bottom: 8px; }
.setup-hero h2 { font-size: 1.2rem; font-weight: 800; margin-bottom: 4px; }
.setup-hero p { font-size: .85rem; opacity: .7; }

.setup-section-title {
  font-size: .82rem; font-weight: 700; color: var(--gray-500);
  text-transform: uppercase; letter-spacing: 1px;
  margin: 16px 0 10px;
}
.set-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
  margin-bottom: 8px;
}
.set-card {
  background: var(--white); border-radius: var(--radius-md);
  border: 2px solid var(--gray-200);
  padding: 14px 10px; text-align: center; cursor: pointer;
  transition: all .15s;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
}
.set-card:hover { border-color: var(--duo-blue); background: var(--duo-blue-l); }
.set-card:active { transform: translateY(2px); }
.set-card .sc-icon { font-size: 1.4rem; }
.set-card .sc-num { font-size: 1rem; font-weight: 800; color: var(--duo-blue); }
.set-card .sc-label { font-size: .72rem; font-weight: 600; color: var(--gray-500); }
.set-card.full-card {
  grid-column: 1/-1; flex-direction: row; justify-content: center;
  background: linear-gradient(90deg, var(--duo-blue), #0e9fd8);
  border-color: var(--duo-blue); color: white; gap: 10px;
}
.set-card.full-card .sc-num,
.set-card.full-card .sc-label { color: white; }

.cat-list { display: flex; flex-direction: column; gap: 8px; }
.cat-item {
  display: flex; align-items: center; gap: 12px;
  background: var(--white); border: 2px solid var(--gray-200);
  border-radius: var(--radius-md); padding: 12px 14px;
  cursor: pointer; transition: all .15s;
}
.cat-item:hover { border-color: var(--duo-green); }
.cat-item:active { transform: translateY(1px); }
.cat-icon-wrap {
  width: 38px; height: 38px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; flex-shrink: 0;
}
.cat-item .ci-name { font-size: .88rem; font-weight: 700; color: var(--gray-900); }
.cat-item .ci-count { font-size: .75rem; color: var(--gray-500); }
.cat-item .ci-arrow { color: var(--gray-300); margin-left: auto; }

.quiz-hint-box {
  background: var(--duo-yellow-l); border-radius: var(--radius-md);
  padding: 12px 14px; border-left: 4px solid var(--duo-yellow);
  font-size: .82rem; color: var(--gray-700); margin-top: 8px;
}

/* ════════════════════════════════════════════════════════════
   탭 2: 기출테스트 진행
════════════════════════════════════════════════════════════ */
.test-top {
  display: flex; align-items: center; gap: 12px; margin-bottom: 20px;
}
.back-icon-btn {
  width: 40px; height: 40px; border-radius: 50%;
  border: 2px solid var(--gray-200); background: var(--white);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--gray-500);
  transition: all .15s; flex-shrink: 0;
  font-size: 1rem;
}
.back-icon-btn:hover { border-color: var(--duo-blue); color: var(--duo-blue); }

/* 문제 카드 */
.question-wrap {
  background: var(--white); border-radius: var(--radius-xl);
  box-shadow: 0 4px 0 var(--gray-200), 0 1px 12px rgba(0,0,0,.06);
  padding: 24px; margin-bottom: 16px;
}
.q-cat-row {
  display: flex; align-items: center; gap: 8px; margin-bottom: 12px;
}
.q-cat-chip {
  padding: 4px 12px; border-radius: 20px;
  font-size: .72rem; font-weight: 700; letter-spacing: .3px;
}
.q-num-label { font-size: .78rem; color: var(--gray-300); font-weight: 600; }
.q-text {
  font-size: 1rem; font-weight: 700; color: var(--gray-900);
  line-height: 1.65; margin-bottom: 20px;
}

/* 답변 입력 */
.answer-textarea {
  width: 100%; min-height: 120px;
  border: 2px solid var(--gray-200); border-radius: var(--radius-md);
  padding: 14px; font-family: var(--font); font-size: .9rem;
  color: var(--gray-700); resize: vertical; outline: none;
  transition: border-color .15s; line-height: 1.7;
}
.answer-textarea:focus { border-color: var(--duo-blue); }

.reveal-btn {
  width: 100%; margin-top: 12px;
  background: var(--white); color: var(--duo-blue);
  border: 2px solid var(--duo-blue);
  border-radius: var(--radius-md); padding: 13px;
  font-family: var(--font); font-size: .9rem; font-weight: 700;
  cursor: pointer; transition: all .15s;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.reveal-btn:hover { background: var(--duo-blue-l); }

/* 모범답안 */
.model-answer-box {
  background: #f0fdf4; border-radius: var(--radius-md);
  border: 2px solid var(--duo-green); padding: 16px; margin-top: 14px;
}
.model-answer-box .ma-title {
  font-size: .82rem; font-weight: 800; color: var(--duo-green-d);
  display: flex; align-items: center; gap: 6px; margin-bottom: 10px;
}
.ma-text {
  font-size: .88rem; color: var(--gray-700); line-height: 1.8;
  white-space: pre-wrap; margin-bottom: 12px;
}

/* 자기채점 */
.self-score-row {
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 8px; margin-top: 14px;
}
.score-option {
  border: 2px solid; border-radius: var(--radius-md);
  padding: 10px; text-align: center; cursor: pointer;
  font-family: var(--font); font-size: .82rem; font-weight: 700;
  transition: all .15s; background: white;
}
.score-option .so-icon { font-size: 1.2rem; display: block; margin-bottom: 3px; }
.score-opt-correct { border-color: var(--duo-green); color: var(--duo-green-d); }
.score-opt-correct:hover, .score-opt-correct.active { background: var(--duo-green); color: white; box-shadow: 0 3px 0 var(--duo-green-d); }
.score-opt-partial { border-color: var(--duo-yellow); color: #a87000; }
.score-opt-partial:hover, .score-opt-partial.active { background: var(--duo-yellow); color: white; box-shadow: 0 3px 0 #c89400; }
.score-opt-wrong   { border-color: var(--duo-red); color: var(--duo-red); }
.score-opt-wrong:hover, .score-opt-wrong.active   { background: var(--duo-red); color: white; box-shadow: 0 3px 0 #cc2a2a; }

/* 이전/다음 내비게이션 */
.nav-row {
  display: flex; gap: 10px; margin-top: 8px;
}
.nav-row .btn { flex: 1; }

/* ════════════════════════════════════════════════════════════
   결과 화면
════════════════════════════════════════════════════════════ */
.result-hero {
  background: linear-gradient(135deg, #1a3a1a 0%, #16a34a 100%);
  border-radius: var(--radius-xl); padding: 32px 24px;
  text-align: center; color: white; margin-bottom: 20px;
}
.result-hero .rh-owl { font-size: 3.5rem; margin-bottom: 8px; }
.result-hero .rh-title { font-size: 1.4rem; font-weight: 900; margin-bottom: 4px; }
.result-hero .rh-sub { font-size: .88rem; opacity: .8; }

.result-stats-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 20px;
}
.result-stats-grid [style*="grid-column:span 2"] { grid-column: span 2; }
.result-stats-grid [style*="grid-column:span 3"] { grid-column: span 3; }
.result-stat-card {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 16px 10px; text-align: center;
  box-shadow: 0 2px 0 var(--gray-200);
}
.rsc-num { font-size: 1.8rem; font-weight: 900; }
.rsc-label { font-size: .72rem; font-weight: 600; color: var(--gray-500); }
.rsc-correct .rsc-num { color: var(--duo-green); }
.rsc-partial .rsc-num { color: var(--duo-yellow); }
.rsc-wrong   .rsc-num { color: var(--duo-red); }

.result-list-title {
  font-size: .88rem; font-weight: 700; color: var(--gray-700); margin-bottom: 10px;
}
.result-item {
  display: flex; align-items: center; gap: 12px;
  background: var(--white); border-radius: var(--radius-md);
  padding: 12px 14px; margin-bottom: 8px;
  border-left: 4px solid transparent;
}
.result-item.ri-correct { border-left-color: var(--duo-green); }
.result-item.ri-partial { border-left-color: var(--duo-yellow); }
.result-item.ri-wrong   { border-left-color: var(--duo-red); }
.ri-icon { font-size: 1.1rem; flex-shrink: 0; }
.ri-text { font-size: .85rem; color: var(--gray-700); }
.result-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.result-actions .btn { flex: 1; min-width: 120px; }

/* ════════════════════════════════════════════════════════════
   탭 3: 플래시카드 – 듀오링고 게임 UI
════════════════════════════════════════════════════════════ */

/* 라이프/하트 */
.lives-row {
  display: flex; align-items: center; gap: 6px; margin-bottom: 4px;
}
.heart { font-size: 1.2rem; transition: transform .2s; }
.heart.lost { filter: grayscale(1); opacity: .3; transform: scale(.8); }

/* 문제 영역 */
.flash-question-card {
  background: var(--white); border-radius: var(--radius-xl);
  box-shadow: 0 4px 0 var(--gray-200), 0 1px 12px rgba(0,0,0,.06);
  padding: 24px; margin-bottom: 16px;
  position: relative; overflow: hidden;
}
.flash-question-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 5px;
  background: linear-gradient(90deg, var(--duo-green), var(--duo-blue));
}
.fq-type-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 12px; border-radius: 20px;
  font-size: .72rem; font-weight: 700;
  margin-bottom: 10px;
}
.fq-cat-label {
  font-size: .7rem; font-weight: 700; color: var(--gray-500);
  margin-bottom: 8px; text-transform: uppercase; letter-spacing: .5px;
}
.fq-question {
  font-size: 1rem; font-weight: 700; color: var(--gray-900);
  line-height: 1.65; margin-bottom: 6px;
}
.fq-hint {
  font-size: .78rem; color: var(--gray-300);
  display: flex; align-items: center; gap: 4px; margin-bottom: 16px;
}
.fq-hint.hidden { display: none !important; }

/* ── 빈칸 채우기 ────────────────────────────────────────── */
.blank-question-text {
  font-size: 1rem; font-weight: 600; color: var(--gray-900);
  line-height: 2; margin-bottom: 16px;
}
.blank-slot {
  display: inline-block;
  min-width: 80px; padding: 2px 8px;
  border-bottom: 3px solid var(--duo-blue);
  margin: 0 4px; vertical-align: middle;
  background: var(--duo-blue-l); border-radius: 4px;
  font-weight: 800; color: var(--duo-blue-d); cursor: pointer;
  transition: all .15s;
}
.blank-slot.filled { background: var(--duo-green-l); border-color: var(--duo-green); color: var(--duo-green-d); }
.blank-slot.wrong-ans { background: var(--duo-red-l); border-color: var(--duo-red); color: var(--duo-red); animation: shake .3s; }
.blank-slot.empty-active { background: #fff3b0; border-color: var(--duo-yellow); animation: pulse-border 1s infinite; }

@keyframes pulse-border {
  0%,100% { border-color: var(--duo-yellow); }
  50%      { border-color: var(--duo-orange); }
}
@keyframes shake {
  0%,100% { transform: translateX(0); }
  25%      { transform: translateX(-4px); }
  75%      { transform: translateX(4px); }
}

/* 타일 선택지 풀 */
.tiles-pool {
  display: flex; flex-wrap: wrap; gap: 8px;
  padding: 14px; background: var(--gray-50); border-radius: var(--radius-md);
  min-height: 54px;
}
.tile {
  padding: 8px 16px; background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-sm); cursor: pointer;
  font-family: var(--font); font-size: .85rem; font-weight: 600;
  color: var(--gray-700); user-select: none;
  box-shadow: 0 3px 0 var(--gray-200);
  transition: all .12s;
}
.tile:hover { border-color: var(--duo-blue); color: var(--duo-blue); background: var(--duo-blue-l); }
.tile:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--gray-200); }
.tile.used { opacity: 0; pointer-events: none; transform: scale(.8); }

/* ── 4지선다 ─────────────────────────────────────────────── */
.choices-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
}
.choice-btn {
  background: var(--white); border: 2px solid var(--gray-200);
  border-radius: var(--radius-md); padding: 14px 12px;
  cursor: pointer; font-family: var(--font); font-size: .88rem; font-weight: 600;
  color: var(--gray-700); text-align: left; line-height: 1.4;
  box-shadow: 0 3px 0 var(--gray-200);
  transition: all .12s; display: flex; align-items: flex-start; gap: 10px;
}
.choice-btn:hover:not(:disabled) { border-color: var(--duo-blue); background: var(--duo-blue-l); color: var(--duo-blue-d); box-shadow: 0 3px 0 #0a8fc0; }
.choice-btn:active:not(:disabled) { transform: translateY(2px); box-shadow: 0 1px 0 var(--gray-200); }
.choice-btn.correct-ans {
  border-color: var(--duo-green); background: #d7f8a0;
  color: var(--duo-green-d); box-shadow: 0 3px 0 var(--duo-green-d);
}
.choice-btn.wrong-ans {
  border-color: var(--duo-red); background: var(--duo-red-l);
  color: var(--duo-red); box-shadow: 0 3px 0 #cc2a2a;
  animation: shake .3s;
}
.choice-letter {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--gray-100); color: var(--gray-500);
  display: flex; align-items: center; justify-content: center;
  font-size: .75rem; font-weight: 800; flex-shrink: 0;
}
.choice-btn.correct-ans .choice-letter { background: var(--duo-green); color: white; }
.choice-btn.wrong-ans   .choice-letter { background: var(--duo-red);   color: white; }

/* ── 순서 맞추기 ─────────────────────────────────────────── */
.order-answer-zone {
  min-height: 60px; padding: 12px;
  background: var(--duo-blue-l); border: 2px dashed var(--duo-blue);
  border-radius: var(--radius-md); display: flex; flex-wrap: wrap; gap: 8px;
  margin-bottom: 12px; align-items: center;
}
.order-tile {
  padding: 8px 14px; background: var(--duo-blue);
  color: white; border-radius: var(--radius-sm); cursor: pointer;
  font-family: var(--font); font-size: .85rem; font-weight: 600;
  box-shadow: 0 3px 0 var(--duo-blue-d);
  transition: all .12s; user-select: none;
  display: flex; align-items: center; gap: 6px;
}
.order-tile:hover { background: var(--duo-blue-d); }
.order-tile:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--duo-blue-d); }
.order-tile .tile-idx {
  width: 20px; height: 20px; background: rgba(255,255,255,.25);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: .7rem; font-weight: 800;
}
.order-tile.correct-tile { background: var(--duo-green); box-shadow: 0 3px 0 var(--duo-green-d); }
.order-tile.wrong-tile   { background: var(--duo-red);   box-shadow: 0 3px 0 #cc2a2a; animation: shake .3s; }

/* ── 정답/오답 피드백 배너 ──────────────────────────────── */
.feedback-banner {
  border-radius: var(--radius-lg); padding: 16px 18px;
  margin-top: 12px; display: none;
}
.feedback-banner.show { display: flex; align-items: flex-start; gap: 12px; }
.feedback-banner.correct-fb {
  background: #d7f8a0; border: 2px solid var(--duo-green);
}
.feedback-banner.wrong-fb {
  background: var(--duo-red-l); border: 2px solid var(--duo-red);
}
.fb-icon { font-size: 1.6rem; flex-shrink: 0; margin-top: 2px; }
.fb-content { flex: 1; }
.fb-title { font-size: .9rem; font-weight: 800; margin-bottom: 4px; }
.correct-fb .fb-title { color: var(--duo-green-d); }
.wrong-fb   .fb-title { color: var(--duo-red); }
.fb-explain { font-size: .82rem; color: var(--gray-700); line-height: 1.6; }

/* 체크 버튼 */
.check-btn {
  width: 100%; margin-top: 14px;
  background: var(--duo-green); color: white;
  border: none; border-radius: var(--radius-md);
  padding: 16px; font-family: var(--font); font-size: 1rem; font-weight: 800;
  cursor: pointer; box-shadow: 0 4px 0 var(--duo-green-d);
  transition: all .15s;
  text-transform: uppercase; letter-spacing: 1px;
}
.check-btn:hover { background: #63e000; }
.check-btn:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--duo-green-d); }
.check-btn:disabled { background: var(--gray-200); color: var(--gray-300); box-shadow: 0 4px 0 var(--gray-300); cursor: not-allowed; }
.check-btn.continue-mode { background: var(--duo-blue); box-shadow: 0 4px 0 var(--duo-blue-d); }
.check-btn.continue-mode:hover { background: #1ecaff; }

/* XP 효과 */
.xp-popup {
  position: fixed; pointer-events: none; z-index: 9999;
  font-size: 1.2rem; font-weight: 900; color: var(--duo-yellow);
  text-shadow: 0 2px 4px rgba(0,0,0,.2);
  animation: xpFloat 1s ease-out forwards;
}
@keyframes xpFloat {
  0%   { opacity: 1; transform: translateY(0) scale(1); }
  100% { opacity: 0; transform: translateY(-60px) scale(1.3); }
}

/* 파티클 */
.particle {
  position: fixed; pointer-events: none; z-index: 9998;
  width: 10px; height: 10px; border-radius: 50%;
  animation: particleFly .8s ease-out forwards;
}
@keyframes particleFly {
  0%   { opacity: 1; transform: translate(0,0) scale(1); }
  100% { opacity: 0; transform: var(--tx, translate(40px,-80px)) scale(0); }
}

/* ════════════════════════════════════════════════════════════
   탭 3: 플래시카드 셋업
════════════════════════════════════════════════════════════ */
.flash-setup-hero {
  background: linear-gradient(135deg, #1a1a3a 0%, #4f46e5 100%);
  border-radius: var(--radius-xl); padding: 24px 20px;
  margin-bottom: 16px; color: white; text-align: center;
}
.flash-setup-hero .hero-icon { font-size: 3rem; margin-bottom: 8px; }
.flash-setup-hero h2 { font-size: 1.2rem; font-weight: 800; margin-bottom: 4px; }
.flash-setup-hero p { font-size: .85rem; opacity: .7; }

/* 유형 범례 */
.type-legend {
  display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px;
}
.type-badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 12px; border-radius: 20px;
  font-size: .78rem; font-weight: 700;
}

/* ════════════════════════════════════════════════════════════
   탭 4: 오답노트
════════════════════════════════════════════════════════════ */
.wrong-tabs {
  display: flex; gap: 8px; margin-bottom: 16px;
}
.wrong-tab {
  flex: 1; padding: 10px; border-radius: var(--radius-md);
  border: 2px solid var(--gray-200); background: var(--white);
  cursor: pointer; font-family: var(--font); font-size: .85rem; font-weight: 700;
  color: var(--gray-500); text-align: center; transition: all .15s;
}
.wrong-tab.active { border-color: var(--duo-red); color: var(--duo-red); background: var(--duo-red-l); }
.wrong-tab .wt-count {
  display: inline-block; background: var(--duo-red); color: white;
  border-radius: 10px; padding: 1px 8px; font-size: .72rem; margin-left: 4px;
}
.wrong-tab:not(.active) .wt-count { background: var(--gray-200); color: var(--gray-500); }

.wrong-item-card {
  background: var(--white); border-radius: var(--radius-lg);
  border: 2px solid var(--gray-200); margin-bottom: 10px; overflow: hidden;
  transition: border-color .15s;
}
.wrong-item-card:hover { border-color: var(--duo-red); }
.wic-header {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px; cursor: pointer; background: var(--white);
}
.wic-icon {
  width: 32px; height: 32px; background: var(--duo-red-l);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: .9rem; flex-shrink: 0;
}
.wic-info { flex: 1; min-width: 0; }
.wic-cat { font-size: .7rem; font-weight: 700; color: var(--duo-red); margin-bottom: 2px; }
.wic-q { font-size: .88rem; font-weight: 600; color: var(--gray-900); }
.wic-cnt {
  background: var(--duo-red-l); color: var(--duo-red);
  border-radius: 10px; padding: 2px 10px; font-size: .75rem; font-weight: 700;
  flex-shrink: 0;
}
.wic-body {
  display: none; padding: 0 16px 16px;
  font-size: .85rem; color: var(--gray-700); line-height: 1.8;
  white-space: pre-wrap; background: var(--gray-50); border-top: 1px solid var(--gray-200);
  padding-top: 14px;
}
.wrong-item-card.open .wic-body { display: block; }

.empty-state {
  text-align: center; padding: 48px 20px; color: var(--gray-300);
}
.empty-state .es-icon { font-size: 3rem; margin-bottom: 12px; display: block; }
.empty-state p { font-size: .9rem; font-weight: 600; }

/* ════════════════════════════════════════════════════════════
   탭 5: 통계
════════════════════════════════════════════════════════════ */
.stats-hero {
  background: linear-gradient(135deg, #1a2a1a 0%, #15803d 100%);
  border-radius: var(--radius-xl); padding: 20px;
  margin-bottom: 16px; color: white;
  display: flex; align-items: center; gap: 16px;
}
.stats-hero .sh-icon { font-size: 2.5rem; }
.sh-text h3 { font-size: 1rem; font-weight: 800; }
.sh-text p  { font-size: .82rem; opacity: .7; }

.stats-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px;
}
.stat-block {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 16px; text-align: center;
  box-shadow: 0 2px 0 var(--gray-200);
  border-top: 4px solid;
}
.stat-block .sb-num { font-size: 1.6rem; font-weight: 900; margin-bottom: 2px; }
.stat-block .sb-label { font-size: .75rem; font-weight: 600; color: var(--gray-500); }
.stat-block .sb-pct { font-size: .8rem; font-weight: 700; margin-top: 2px; }

.chart-wrap {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 18px; margin-bottom: 12px;
  box-shadow: 0 2px 0 var(--gray-200);
}
.chart-wrap h4 { font-size: .85rem; font-weight: 700; margin-bottom: 12px; color: var(--gray-700); }

.stats-cat-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.stats-cat-chip {
  padding: 5px 12px; border-radius: 20px;
  border: 2px solid var(--gray-200); background: var(--white);
  font-family: var(--font); font-size: .78rem; font-weight: 600; color: var(--gray-500);
  cursor: pointer; transition: all .15s;
}
.stats-cat-chip.active { background: var(--duo-red); color: white; border-color: var(--duo-red); }

.detail-wrong-item {
  background: var(--white); border-radius: var(--radius-md);
  border: 2px solid var(--gray-200); padding: 12px 14px;
  margin-bottom: 8px; cursor: pointer; transition: border-color .15s;
  display: flex; align-items: flex-start; gap: 10px;
}
.detail-wrong-item:hover { border-color: var(--duo-red); }
.dwi-icon { font-size: .9rem; flex-shrink: 0; margin-top: 2px; }
.dwi-content { flex: 1; min-width: 0; }
.dwi-cat { font-size: .7rem; font-weight: 700; color: var(--gray-500); margin-bottom: 2px; }
.dwi-q { font-size: .85rem; font-weight: 600; color: var(--gray-900); }
.dwi-ans { display: none; font-size: .82rem; color: var(--gray-700); margin-top: 8px; line-height: 1.7; white-space: pre-wrap; }
.detail-wrong-item.open .dwi-ans { display: block; }
.dwi-type { font-size: .7rem; font-weight: 700; padding: 2px 8px; border-radius: 10px; flex-shrink: 0; }
.dwi-quiz  { background: var(--duo-blue-l); color: var(--duo-blue-d); }
.dwi-flash { background: var(--duo-purple-l); color: #8b2fc9; }

/* ── 반응형 ─────────────────────────────────────────────── */
@media (max-width: 480px) {
  .header-logo span { display: none; }
  .tab-btn span { display: none; }
  .tab-btn { min-width: 56px; }
  .set-grid { grid-template-columns: repeat(2, 1fr); }
  .choices-grid { grid-template-columns: 1fr; }
  .result-stats-grid { grid-template-columns: 1fr 1fr 1fr; }
  .self-score-row { grid-template-columns: 1fr 1fr 1fr; }
  .q-text { font-size: .92rem; }
  .fq-question { font-size: .92rem; }
}

/* ── 애니메이션 ────────────────────────────────────────── */
@keyframes slideIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes bounceIn {
  0%   { transform: scale(.3); opacity: 0; }
  50%  { transform: scale(1.05); }
  70%  { transform: scale(.9); }
  100% { transform: scale(1); opacity: 1; }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.animate-slide { animation: slideIn .25s ease forwards; }
.animate-bounce { animation: bounceIn .4s ease forwards; }
.animate-fade { animation: fadeIn .2s ease forwards; }

/* ════════════════════════════════════════════════════════════
   탭 1: 핵심정리 – 읽기 모드
════════════════════════════════════════════════════════════ */

/* 모드 전환 탭 */
.summary-mode-tabs {
  display: flex; gap: 6px; margin-bottom: 16px;
  background: var(--gray-100); border-radius: var(--radius-lg);
  padding: 4px;
}
.smode-btn {
  flex: 1; padding: 9px 12px; border-radius: var(--radius-md);
  border: none; background: transparent; cursor: pointer;
  font-family: var(--font); font-size: .85rem; font-weight: 700;
  color: var(--gray-500); display: flex; align-items: center;
  justify-content: center; gap: 6px; transition: all .18s;
}
.smode-btn.active {
  background: var(--white); color: var(--duo-blue);
  box-shadow: 0 2px 6px rgba(0,0,0,.1);
}
.smode-btn:not(.active):hover { color: var(--gray-700); }

/* 읽기 모드 히어로 */
.reader-hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
  border-radius: var(--radius-xl); padding: 28px 20px;
  text-align: center; color: white; margin-bottom: 20px;
}
.reader-hero .rh-icon { font-size: 3rem; margin-bottom: 8px; }
.reader-hero h2 { font-size: 1.3rem; font-weight: 900; margin-bottom: 4px; }
.reader-hero p { font-size: .85rem; opacity: .7; }

/* 카테고리 그리드 */
.reader-cat-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
  margin-bottom: 12px;
}
.reader-cat-card {
  background: var(--white); border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg); padding: 14px 12px;
  cursor: pointer; transition: all .15s;
  display: flex; align-items: center; gap: 12px;
}
.reader-cat-card:hover { border-color: var(--duo-blue); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,.08); }
.reader-cat-card:active { transform: translateY(1px); }
.rcc-icon {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; flex-shrink: 0;
}
.rcc-info { min-width: 0; }
.rcc-name { font-size: .82rem; font-weight: 700; color: var(--gray-900); line-height: 1.3; }
.rcc-count { font-size: .72rem; color: var(--gray-500); font-weight: 600; margin-top: 2px; }

.reader-all-btn-wrap { margin-top: 4px; }

/* ── 플레이어 ── */
.rp-topbar {
  display: flex; align-items: center; gap: 10px; margin-bottom: 14px;
}
.rp-cat-info {
  flex: 1; display: flex; flex-direction: column; gap: 2px;
}
.rp-cat-label {
  font-size: .8rem; font-weight: 800; color: var(--duo-blue);
}
.rp-progress-text {
  font-size: .72rem; color: var(--gray-500); font-weight: 600;
}
.rp-speed-select {
  border: 2px solid var(--gray-200); border-radius: var(--radius-sm);
  padding: 5px 8px; font-family: var(--font); font-size: .8rem;
  font-weight: 700; color: var(--gray-700); background: var(--white);
  cursor: pointer; outline: none;
}
.rp-speed-select:focus { border-color: var(--duo-blue); }

/* 진행바 */
.rp-pbar-wrap {
  height: 6px; background: var(--gray-200); border-radius: 3px;
  margin-bottom: 16px; overflow: hidden;
}
.rp-pbar {
  height: 100%; border-radius: 3px; width: 0%;
  background: linear-gradient(90deg, var(--duo-blue), #1cb0f6);
  transition: width .5s cubic-bezier(.34,1.56,.64,1);
}

/* 메인 플레이어 카드 */
.rp-card {
  background: var(--white); border-radius: var(--radius-xl);
  box-shadow: 0 4px 0 var(--gray-200), 0 2px 16px rgba(0,0,0,.07);
  padding: 24px; margin-bottom: 16px;
  min-height: 220px;
  position: relative; overflow: hidden;
  transition: box-shadow .2s;
}
.rp-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 5px;
  background: linear-gradient(90deg, var(--duo-blue), var(--duo-purple));
  transition: opacity .3s;
}
.rp-card.reading-answer::before {
  background: linear-gradient(90deg, var(--duo-green), #63e000);
}

/* 상태 뱃지 */
.rp-state-badge {
  display: inline-flex; align-items: center; gap: 7px;
  background: var(--duo-blue-l); color: var(--duo-blue-d);
  border-radius: 20px; padding: 4px 13px;
  font-size: .75rem; font-weight: 700; margin-bottom: 14px;
  transition: background .3s, color .3s;
}
.rp-card.reading-answer .rp-state-badge {
  background: var(--duo-green-l); color: var(--duo-green-d);
}
.rsb-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--duo-blue); animation: blink 1s infinite;
}
.rp-card.reading-answer .rsb-dot { background: var(--duo-green); }
@keyframes blink {
  0%,100% { opacity: 1; }
  50%      { opacity: .2; }
}

/* 문제 번호 */
.rp-q-num {
  font-size: .78rem; font-weight: 800; color: var(--gray-300);
  letter-spacing: .5px; margin-bottom: 8px;
}

/* 문제 텍스트 */
.rp-question {
  font-size: 1.05rem; font-weight: 700; color: var(--gray-900);
  line-height: 1.7; margin-bottom: 0;
}
.rp-question.speaking {
  color: var(--duo-blue);
}

/* 정답 영역 */
.rp-answer-wrap {
  margin-top: 16px;
  animation: slideIn .3s ease forwards;
}
.rp-answer-wrap.hidden { display: none; }
.rp-divider {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 12px;
}
.rp-divider::before, .rp-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--gray-200);
}
.rp-divider span {
  font-size: .72rem; font-weight: 800; color: var(--duo-green-d);
  text-transform: uppercase; letter-spacing: 1px;
}
.rp-answer {
  font-size: .92rem; color: var(--gray-700); line-height: 1.85;
  white-space: pre-wrap;
  background: #f0fdf4; border-radius: var(--radius-md);
  padding: 14px; border-left: 4px solid var(--duo-green);
  margin-bottom: 10px;
}
.rp-answer.speaking {
  background: var(--duo-green-l);
  border-left-color: var(--duo-green-d);
}
.rp-kw-row { display: flex; flex-wrap: wrap; gap: 6px; }

/* 컨트롤 버튼 */
.rp-controls {
  display: flex; align-items: center; justify-content: center;
  gap: 16px; margin-bottom: 12px;
}
.rp-ctrl-btn {
  width: 52px; height: 52px; border-radius: 50%;
  border: none; background: var(--white);
  box-shadow: 0 3px 0 var(--gray-200), 0 1px 8px rgba(0,0,0,.08);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--gray-700); font-size: 1.1rem;
  transition: all .15s;
}
.rp-ctrl-btn:hover { background: var(--gray-50); color: var(--duo-blue); }
.rp-ctrl-btn:active { transform: translateY(2px); box-shadow: 0 1px 0 var(--gray-200); }

.rp-play-btn {
  width: 68px; height: 68px; font-size: 1.4rem;
  background: var(--duo-blue); color: white;
  box-shadow: 0 4px 0 var(--duo-blue-d), 0 2px 12px rgba(28,176,246,.35);
}
.rp-play-btn:hover { background: #1ecaff; color: white; }
.rp-play-btn:active { box-shadow: 0 1px 0 var(--duo-blue-d); }
.rp-play-btn.paused {
  background: var(--duo-green);
  box-shadow: 0 4px 0 var(--duo-green-d), 0 2px 12px rgba(88,204,2,.35);
}
.rp-play-btn.paused:hover { background: #63e000; }

/* 옵션 */
.rp-options {
  display: flex; align-items: center; justify-content: center;
  gap: 16px; flex-wrap: wrap;
  padding: 10px 0;
}
.rp-opt-label {
  display: flex; align-items: center; gap: 6px;
  font-size: .8rem; font-weight: 600; color: var(--gray-700);
  cursor: pointer; user-select: none;
}
.rp-opt-label input[type="checkbox"] {
  width: 16px; height: 16px; cursor: pointer;
  accent-color: var(--duo-blue);
}

/* 읽기 중 아코디언 하이라이트 */
.acc-card.reading-now {
  border-color: var(--duo-blue);
  box-shadow: 0 0 0 3px rgba(28,176,246,.2);
}
.acc-card.reading-answer-now {
  border-color: var(--duo-green);
  box-shadow: 0 0 0 3px rgba(88,204,2,.2);
}

/* 음성 선택 */
.rp-voice-wrap {
  background: var(--white);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 14px 16px;
  margin-bottom: 10px;
}
.rp-voice-label {
  font-size: .78rem; font-weight: 800;
  color: var(--gray-700);
  display: flex; align-items: center; gap: 6px;
  margin-bottom: 8px;
}
.rp-voice-label i { color: var(--duo-blue); }
.rp-voice-select {
  width: 100%;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  font-family: var(--font); font-size: .88rem; font-weight: 600;
  color: var(--gray-900); background: var(--gray-50);
  cursor: pointer; outline: none;
  transition: border-color .15s;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23777' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}
.rp-voice-select:focus { border-color: var(--duo-blue); background-color: var(--white); }
.rp-voice-select option { font-weight: 600; }
.rp-voice-hint {
  font-size: .75rem; color: var(--gray-500);
  margin-top: 8px; line-height: 1.5;
}
.rp-voice-hint strong { color: var(--duo-blue); }

/* 음성 뱃지 (선택된 음성 표시) */
.rp-active-voice {
  display: inline-flex; align-items: center; gap: 5px;
  background: var(--duo-blue-l); color: var(--duo-blue-d);
  border-radius: 20px; padding: 3px 10px;
  font-size: .75rem; font-weight: 700;
  margin-top: 6px;
}
.rp-active-voice.samsung {
  background: #e8f5e9; color: #1b5e20;
}
.rp-active-voice.google {
  background: #e3f2fd; color: #0d47a1;
}

/* 보조 버튼 */
.rp-sub-btns {
  display: flex; gap: 8px; justify-content: center; margin-top: 8px;
}
.rp-sub-btns .btn { flex: 1; max-width: 180px; }

/* 반응형 */
@media (max-width: 480px) {
  .reader-cat-grid { grid-template-columns: 1fr; }
  .rp-options { gap: 10px; }
  .rp-sub-btns { flex-direction: column; align-items: center; }
  .rp-sub-btns .btn { max-width: 240px; width: 100%; }
}

/* 스크롤바 */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--gray-100); }
::-webkit-scrollbar-thumb { background: var(--gray-200); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-300); }