/* sprout — 다크테마, 새싹 그린 액센트 */
:root {
  --bg: #0d1117;
  --bg-elevated: #161b22;
  --card: #1c2128;
  --card-hover: #22272e;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #4ade80;          /* sprout green */
  --accent-strong: #22c55e;
  --accent-dim: rgba(74, 222, 128, 0.15);
  --danger: #f87171;
  --warn: #fbbf24;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow: 0 4px 16px rgba(0,0,0,0.4);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
/* HTML hidden 속성이 CSS display를 못 이기는 문제 방어 (streak-chip, today-box 등) */
[hidden] { display: none !important; }
html, body { background: var(--bg); color: var(--text); }
body {
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", "Yu Gothic UI", "Hiragino Sans", "Meiryo", "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-strong); }
code {
  background: var(--accent-dim);
  color: var(--accent);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

/* ─── nav ─── */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  display: flex; justify-content: space-between; align-items: center;
}
.logo {
  font-size: 1.2rem; font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
}
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-link {
  color: var(--muted);
  font-size: 0.85rem;
  padding: 6px 10px;
  border-radius: 6px;
  transition: all 0.15s;
}
.nav-link:hover { color: var(--text); background: var(--card); }

/* ─── volume control ─── */
.volume-control {
  display: flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  border-radius: 8px;
  background: var(--card);
  border: 1px solid var(--border);
}
.volume-btn {
  background: transparent; border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.95rem;
  padding: 0; line-height: 1;
  transition: color 0.15s;
}
.volume-btn:hover, .volume-btn.active { color: var(--accent); }
.volume-btn.muted { color: var(--danger); }
#volume-slider {
  width: 60px;
  height: 4px;
  -webkit-appearance: none; appearance: none;
  background: var(--border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}
#volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 12px; height: 12px;
  background: var(--accent);
  border-radius: 50%; cursor: pointer;
  transition: transform 0.1s;
}
#volume-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }
#volume-slider::-moz-range-thumb {
  width: 12px; height: 12px;
  background: var(--accent);
  border-radius: 50%; cursor: pointer; border: none;
}
/* 모바일에선 볼륨 슬라이더 숨기고 버튼만 */
@media (max-width: 600px) {
  #volume-slider { display: none; }
  .volume-control { padding: 4px 8px; }
}

/* ─── lang switcher (구독 언어 전환) ─── */
.lang-switch {
  display: inline-flex; align-items: center; gap: 4px;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: border-color 0.15s, background 0.15s;
}
.lang-switch:hover { border-color: var(--accent); background: var(--card-hover); }
.lang-switch .ls-flag { opacity: 0.35; transition: opacity 0.15s; font-size: 1rem; }
html[data-active-lang="fr"] .lang-switch .ls-flag[data-lang="fr"],
html[data-active-lang="ja"] .lang-switch .ls-flag[data-lang="ja"] {
  opacity: 1;
}
.lang-switch .ls-arrow { color: var(--muted); font-size: 0.75rem; margin: 0 2px; }

/* 비활성 언어 섹션 숨김 */
html[data-active-lang="fr"] .lang-section[data-lang-section="ja"],
html[data-active-lang="ja"] .lang-section[data-lang-section="fr"] {
  display: none;
}

/* ─── 첫 방문 온보딩 모달 ─── */
.onboarding {
  position: fixed; inset: 0;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.onboarding-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  max-width: 460px; width: 100%;
  box-shadow: var(--shadow);
  text-align: center;
}
.onboarding-card h2 { font-size: 1.25rem; margin-bottom: 8px; color: var(--text); }
.ob-sub { color: var(--muted); font-size: 0.9rem; margin-bottom: 22px; }
.onboarding-options { display: flex; flex-direction: column; gap: 12px; }
.onboarding-btn {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "flag name"
    "flag desc";
  align-items: center;
  column-gap: 14px;
  row-gap: 2px;
  background: var(--card);
  border: 1.5px solid var(--border);
  color: var(--text);
  padding: 16px 18px;
  border-radius: var(--radius);
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  transition: border-color 0.15s, background 0.15s, transform 0.05s;
}
.onboarding-btn:hover { border-color: var(--accent); background: var(--card-hover); }
.onboarding-btn:active { transform: scale(0.98); }
.ob-flag { grid-area: flag; font-size: 2rem; line-height: 1; }
.ob-name { grid-area: name; font-weight: 700; font-size: 1.05rem; }
.ob-desc { grid-area: desc; color: var(--muted); font-size: 0.8rem; }

.logout-form { margin-left: 8px; }
.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-ghost:hover { color: var(--text); border-color: var(--muted); }

.container { max-width: 860px; margin: 0 auto; padding: 24px 20px; }

/* ─── hero (index) ─── */
.hero {
  text-align: center;
  padding: 40px 0 32px;
}
.hero-title {
  font-size: 2.4rem; font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}
.hero-sub { color: var(--muted); font-size: 1.05rem; margin-bottom: 12px; }

/* Streak chip */
.streak-chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(251, 191, 36, 0.12);
  border: 1px solid rgba(251, 191, 36, 0.4);
  color: var(--warn);
  padding: 4px 14px; border-radius: 16px;
  font-size: 0.92rem; font-weight: 600;
  margin: 4px auto 16px;
}
.streak-chip .streak-count { font-size: 1.05rem; font-weight: 800; }
.streak-chip .streak-label { color: var(--muted); font-size: 0.85rem; }
.streak-chip.streak-broken { opacity: 0.5; }
.hero-method { display: flex; justify-content: center; gap: 6px; flex-wrap: wrap; }
.tag {
  display: inline-block;
  background: var(--accent-dim);
  color: var(--accent);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
  border: 1px solid rgba(74, 222, 128, 0.3);
}

/* ─── "오늘의 추천" 배너 ─── */
.today-box {
  background: linear-gradient(135deg, rgba(74, 222, 128, 0.1), rgba(34, 197, 94, 0.05));
  border: 1px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin-bottom: 24px;
}
.today-label {
  font-size: 0.78rem; font-weight: 700;
  color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.08em;
  margin-bottom: 10px;
}
.today-cta {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: all 0.15s;
}
.today-cta:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  color: var(--text);
}
.today-icon {
  font-size: 2rem; flex-shrink: 0;
  line-height: 1;
}
.today-text {
  flex: 1; display: flex; flex-direction: column; gap: 2px;
  min-width: 0;
}
.today-title {
  font-size: 1.05rem; font-weight: 700;
  color: var(--text);
}
.today-reason {
  font-size: 0.85rem; color: var(--muted);
}
.today-arrow {
  font-size: 1.5rem; color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.15s;
}
.today-cta:hover .today-arrow { transform: translateX(4px); }

/* ─── phase card (index) ─── */
.phase-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}
.phase-card.locked { opacity: 0.5; }
.phase-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 16px; flex-wrap: wrap; gap: 8px;
}
.phase-head h2 { font-size: 1.15rem; font-weight: 700; }
.phase-meta { color: var(--muted); font-size: 0.85rem; }

.day-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}
.day-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: all 0.15s;
  color: var(--text);
  display: flex; flex-direction: column; gap: 8px;
}
.day-card:hover:not(.locked) {
  background: var(--card-hover);
  border-color: var(--accent);
  transform: translateY(-2px);
}
.day-card.locked { opacity: 0.4; cursor: not-allowed; }
.day-header-row { display: flex; justify-content: space-between; align-items: center; gap: 6px; }
.day-number {
  font-size: 0.78rem; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600;
}
/* 2-상태 뱃지 (탐색 / 습득) */
.day-status {
  display: flex; gap: 4px; flex-wrap: wrap;
  justify-content: flex-end;
}
.status-chip {
  background: var(--bg-elevated);
  color: var(--muted);
  font-size: 0.68rem; font-weight: 600;
  padding: 2px 7px; border-radius: 8px;
  border: 1px solid var(--border);
  line-height: 1.4;
  font-variant-numeric: tabular-nums;
}
.status-chip.partial {
  background: rgba(74, 222, 128, 0.08);
  color: var(--accent);
  border-color: rgba(74, 222, 128, 0.3);
}
.status-chip.done {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
/* 완료 Day 카드 — 확실히 눈에 띄게 */
.day-card.day-done {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(74, 222, 128, 0.12), rgba(34, 197, 94, 0.04));
}
.day-card.day-done .day-number { color: var(--accent); }
.day-card.day-done:hover { transform: translateY(-2px); }
/* 부분 진도 Day 카드 — 그린 살짝 */
.day-card:has(.day-badge.partial) {
  border-color: rgba(74, 222, 128, 0.3);
}
.day-count {
  font-size: 1.05rem; font-weight: 700; color: var(--text);
}
.day-preview { display: flex; gap: 4px; flex-wrap: wrap; }
.sym-chip {
  background: var(--accent-dim);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
}
.sym-more { color: var(--muted); align-self: center; font-size: 0.85rem; }
.day-preview.muted { color: var(--muted); font-size: 0.85rem; }

/* ─── day header ─── */
.day-header {
  display: flex; justify-content: space-between; align-items: flex-end;
  margin-bottom: 24px; gap: 12px; flex-wrap: wrap;
}
.day-crumb {
  font-size: 0.78rem; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.08em; font-weight: 600;
  margin-bottom: 4px;
}
.day-header h1 { font-size: 2rem; font-weight: 800; letter-spacing: -0.02em; }
.day-header .sub { color: var(--muted); margin-top: 4px; }
.day-nav { display: flex; gap: 8px; align-items: center; }

/* ─── phoneme card ─── */
.phoneme-list { list-style: none; display: flex; flex-direction: column; gap: 16px; }
.phoneme-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  transition: border-color 0.15s;
}
.phoneme-card:hover { border-color: rgba(74, 222, 128, 0.3); }

.phoneme-head {
  display: flex; align-items: center; gap: 14px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

/* ─── 입 모양 힌트 (Day 1 모음만) ─── */
.lip-hint {
  width: 48px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--accent);
  padding: 4px 6px;
  flex-shrink: 0;
}
.lip-hint svg { width: 100%; height: 100%; }
.phoneme-symbol {
  font-size: 3rem; font-weight: 800;
  color: var(--accent);
  min-width: 80px;
  text-align: center;
  line-height: 1;
  letter-spacing: -0.02em;
}
.phoneme-meta { flex: 1; }
.phoneme-ipa {
  font-family: "Charis SIL", "Doulos SIL", "Noto Sans", monospace;
  color: var(--muted);
  font-size: 1.1rem;
  margin-bottom: 2px;
}
.phoneme-ko {
  font-size: 1.1rem; font-weight: 600; color: var(--text);
}
.phoneme-desc {
  color: var(--muted);
  font-size: 0.93rem;
  margin-bottom: 14px;
  white-space: pre-wrap;
  padding-left: 98px;
}

.samples {
  display: flex; flex-direction: column; gap: 6px;
  padding-left: 98px;
}
.sample {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color 0.12s;
}
.sample:hover { border-color: var(--accent); }
.tts-btn {
  background: var(--accent-dim);
  border: none;
  color: var(--accent);
  width: 36px; height: 36px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.12s;
  flex-shrink: 0;
}
.tts-btn:hover { background: var(--accent); color: var(--bg); }
.tts-btn:active { transform: scale(0.95); }
.sample-text { display: flex; gap: 12px; align-items: baseline; flex: 1; }
.sample-fr {
  font-family: "Charis SIL", Georgia, "Yu Gothic UI", "Hiragino Sans", serif;
  font-weight: 600; color: var(--text);
  font-size: 1.05rem;
}
/* 일본어 페이지에서는 kana 크기 강조 */
.phoneme-list[data-lang="ja"] .phoneme-symbol {
  font-size: 3.5rem;
  font-weight: 500;  /* kana는 굵기 줄여 가독성 */
}
.phoneme-list[data-lang="ja"] .sample-fr {
  font-size: 1.15rem;
  font-weight: 500;
}
.sample-ko { color: var(--muted); font-size: 0.9rem; margin-left: auto; }

.day-footer { margin-top: 28px; }

/* ─── goal box (완료 기준) ─── */
.goal-box {
  background: linear-gradient(135deg, rgba(74, 222, 128, 0.08), rgba(34, 197, 94, 0.04));
  border: 1px solid rgba(74, 222, 128, 0.3);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin-bottom: 24px;
}
.goal-title {
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 10px;
  font-size: 0.95rem;
}
.goal-intro { font-size: 0.88rem; color: var(--text); margin-bottom: 6px; font-weight: 500; }
.goal-note {
  font-size: 0.85rem; color: var(--muted);
  margin: 4px 0 14px; padding: 8px 12px;
  background: rgba(74, 222, 128, 0.06);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
}
.goal-steps {
  list-style: none; counter-reset: step;
  padding-left: 0; margin-bottom: 8px;
}
.goal-steps li {
  position: relative;
  padding: 4px 0 4px 28px;
  color: var(--text);
  font-size: 0.9rem;
  counter-increment: step;
}
.goal-steps li::before {
  content: counter(step);
  position: absolute; left: 0; top: 4px;
  width: 20px; height: 20px;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 700;
}

.progress-row {
  display: flex; align-items: center; gap: 12px;
  padding-top: 8px;
  border-top: 1px solid rgba(74, 222, 128, 0.15);
}
.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--bg);
  border-radius: 4px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width 0.3s ease;
}
.progress-text {
  font-size: 0.85rem; color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.progress-text #progress-count {
  color: var(--accent); font-weight: 700;
}

/* ─── word progress badge (phoneme 카드 우상단) ─── */
.word-progress {
  margin-left: auto;
  display: inline-flex; align-items: baseline; gap: 2px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 4px 12px;
  font-size: 0.82rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}
.word-progress .wp-cur {
  font-weight: 700;
  color: var(--text);
}
.word-progress .wp-label {
  margin-left: 4px;
  color: var(--muted);
  font-size: 0.78rem;
}
.phoneme-card.done .word-progress {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
}
.phoneme-card.done .word-progress .wp-cur { color: var(--accent); }

/* 완료된 phoneme 카드 */
.phoneme-card.done {
  border-color: rgba(74, 222, 128, 0.4);
  background: linear-gradient(135deg, rgba(74, 222, 128, 0.04), transparent);
}

/* ─── sample 진도 (3회 노출) ─── */
.sample { position: relative; }
.sample-dots {
  display: inline-flex; gap: 4px;
  flex-shrink: 0; align-items: center;
}
.sample-dots .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: background 0.2s, transform 0.15s;
}
.sample-dots .dot.filled {
  background: var(--accent);
  transform: scale(1.15);
}
.sample-check {
  color: var(--accent);
  font-size: 0.95rem;
  font-weight: 700;
  min-width: 12px;
  margin-left: 2px;
  flex-shrink: 0;
}
.sample.played {
  border-color: rgba(74, 222, 128, 0.3);
  background: rgba(74, 222, 128, 0.04);
}

/* ─── complete banner ─── */
.complete-banner {
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 14px 20px;
  border-radius: var(--radius);
  text-align: center;
  font-weight: 600;
  margin-bottom: 12px;
  animation: fadeInUp 0.4s ease;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* next-day 버튼 강조 상태 (완료 시) */
#next-day-btn.highlighted {
  box-shadow: 0 0 0 3px var(--accent-dim);
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.02); }
}

/* ─── login ─── */
.login-box {
  max-width: 360px;
  margin: 80px auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px 28px;
  box-shadow: var(--shadow);
  text-align: center;
}
.login-logo { font-size: 3rem; margin-bottom: 8px; }
.login-title {
  font-size: 1.6rem; font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.login-sub { color: var(--muted); font-size: 0.9rem; margin-bottom: 24px; }
.login-error {
  background: rgba(248, 113, 113, 0.1);
  color: var(--danger);
  border: 1px solid rgba(248, 113, 113, 0.3);
  border-radius: 6px;
  padding: 10px;
  margin-bottom: 16px;
  font-size: 0.9rem;
}
.login-form { display: flex; flex-direction: column; gap: 12px; }
.login-input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--text);
  font-size: 1rem;
  transition: border-color 0.15s;
  width: 100%;
}
.login-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

/* ─── buttons ─── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 6px;
  border: none; border-radius: 8px;
  font-size: 0.95rem; font-weight: 600;
  cursor: pointer; transition: all 0.15s;
  padding: 10px 18px;
  text-decoration: none;
}
.btn-primary {
  background: var(--accent);
  color: var(--bg);
}
.btn-primary:hover {
  background: var(--accent-strong);
  color: var(--bg);
  transform: translateY(-1px);
}
.btn-block { width: 100%; }
.btn-lg { padding: 14px 24px; font-size: 1rem; }
.btn-sm { padding: 6px 12px; font-size: 0.85rem; }

/* ─── empty / warn ─── */
.empty-card {
  background: var(--card);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
}
.empty-card p { margin-bottom: 6px; }
.muted { color: var(--muted); }

/* ─── weak pair notice (adaptive priming) ─── */
.weak-notice {
  display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap;
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.35);
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 12px;
  font-size: 0.9rem;
}
.wn-label { font-weight: 700; color: var(--warn); }
.wn-pair { font-weight: 700; color: var(--text); }
.wn-reason { font-size: 0.82rem; }

/* ─── mastery box (귀 훈련 상단) ─── */
.mastery-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 20px;
  font-size: 0.88rem;
}
.mastery-head {
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; flex-wrap: wrap;
}
.mastery-badge {
  background: var(--accent);
  color: var(--bg);
  padding: 3px 10px; border-radius: 10px;
  font-size: 0.78rem; font-weight: 700;
}
.history-list {
  display: flex; gap: 4px; flex-wrap: wrap;
  margin-top: 10px;
}
.hist-empty { color: var(--muted); font-size: 0.82rem; font-style: italic; }
.hist-item {
  font-size: 0.75rem; font-weight: 600;
  padding: 2px 8px; border-radius: 6px;
  font-variant-numeric: tabular-nums;
}
.hist-item.good { background: rgba(74, 222, 128, 0.15); color: var(--accent); }
.hist-item.ok { background: rgba(251, 191, 36, 0.12); color: var(--warn); }
.hist-item.low { background: rgba(248, 113, 113, 0.1); color: var(--danger); }

/* ─── quiz (귀 훈련) ─── */
.quiz-box { max-width: 580px; margin: 0 auto; }
.quiz-progress {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 24px;
}
.qp-bar {
  flex: 1; height: 6px;
  background: var(--bg-elevated);
  border-radius: 3px; overflow: hidden;
}
.qp-fill {
  height: 100%; background: var(--accent);
  width: 0%; transition: width 0.3s ease;
}
.qp-text {
  font-size: 0.85rem; color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.quiz-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
}
.quiz-prompt {
  font-size: 1rem; color: var(--muted);
  margin-bottom: 20px;
}
.quiz-play {
  background: var(--accent-dim);
  border: 2px solid var(--accent);
  color: var(--accent);
  padding: 20px 32px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1rem; font-weight: 600;
  display: inline-flex; align-items: center; gap: 10px;
  margin-bottom: 24px;
  transition: all 0.15s;
}
.quiz-play:hover { background: var(--accent); color: var(--bg); }
.quiz-play:active { transform: scale(0.97); }
.quiz-play-icon { font-size: 1.5rem; }

.quiz-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}
.quiz-option {
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text);
  text-align: center;
}
.quiz-option:not(:disabled):hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.quiz-option.correct {
  background: rgba(74, 222, 128, 0.15);
  border-color: var(--accent);
}
.quiz-option.wrong {
  background: rgba(248, 113, 113, 0.1);
  border-color: var(--danger);
}
.quiz-option:disabled { cursor: default; }
.qo-symbol {
  font-size: 2rem; font-weight: 800;
  color: var(--accent);
  margin-bottom: 6px;
}
.quiz-option.wrong .qo-symbol { color: var(--danger); }
.qo-meta {
  display: flex; flex-direction: column; gap: 2px;
  font-size: 0.85rem;
}
.qo-ipa { color: var(--muted); font-family: "Charis SIL", monospace; }
.qo-ko { color: var(--text); font-weight: 500; }

.quiz-feedback {
  border-radius: var(--radius);
  padding: 14px 18px;
  text-align: left;
  margin-bottom: 16px;
  animation: fadeInUp 0.25s ease;
}
.quiz-feedback.ok {
  background: rgba(74, 222, 128, 0.1);
  border: 1px solid var(--accent);
  color: var(--accent);
}
.quiz-feedback.ng {
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid var(--danger);
  color: var(--danger);
}
.fb-head { font-weight: 700; margin-bottom: 4px; }
.fb-head strong { font-family: "Charis SIL", serif; }
.fb-explain {
  color: var(--text);
  font-size: 0.88rem; font-weight: 400;
  opacity: 0.9;
}

/* 약점 쌍 분석 */
.weak-analysis {
  margin-top: 12px; padding: 0 8px;
  text-align: left;
}
.weak-list { list-style: none; padding: 0; }
.weak-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 12px; margin-bottom: 4px;
  border-radius: 6px;
  font-size: 0.88rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
}
.weak-pair { font-weight: 700; }
.weak-rate { color: var(--muted); font-size: 0.82rem; font-variant-numeric: tabular-nums; }
.weak-item.weak-high { border-color: var(--danger); background: rgba(248,113,113,0.08); }
.weak-item.weak-mid { border-color: var(--warn); background: rgba(251,191,36,0.06); }
.weak-item.weak-low { border-color: rgba(74,222,128,0.3); background: rgba(74,222,128,0.04); }

/* 결과 화면 */
.quiz-result {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
}
.result-big {
  font-size: 3rem; font-weight: 800;
  color: var(--accent);
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.result-sub {
  font-size: 1rem; color: var(--text);
  margin-bottom: 28px;
}
.result-actions {
  display: flex; flex-direction: column; gap: 10px;
  max-width: 320px; margin: 0 auto;
}

/* ─── debug page ─── */
.debug-output {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  font-family: "Consolas", "Monaco", monospace;
  font-size: 0.82rem;
  color: var(--text);
  overflow-x: auto;
  white-space: pre-wrap;
  max-height: 400px;
  overflow-y: auto;
}
.debug-history { list-style: none; padding: 0; }
.debug-history-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  margin-bottom: 8px;
}
.debug-history-item details summary { cursor: pointer; margin-top: 4px; }
.debug-history-item pre {
  background: var(--bg);
  padding: 10px;
  border-radius: 6px;
  margin-top: 8px;
  overflow-x: auto;
  font-size: 0.78rem;
}

/* ─── responsive ─── */
@media (max-width: 600px) {
  .container { padding: 16px 12px; }
  .phoneme-symbol { font-size: 2.2rem; min-width: 56px; }
  .phoneme-desc, .samples { padding-left: 0; margin-top: 10px; }
  .nav-links { flex-wrap: wrap; justify-content: flex-end; }
  .nav-link { font-size: 0.78rem; padding: 4px 8px; }
  .hero-title { font-size: 1.9rem; }
  .day-header { flex-direction: column; align-items: stretch; }
  .day-header h1 { font-size: 1.5rem; }
}