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

body {
  font-family: 'Segoe UI', 'Malgun Gothic', sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  padding: 20px;
}

.container { width: 100%; max-width: 620px; }

/* ═══ 헤더 ═══ */
.app-header { text-align: center; margin-bottom: 18px; }
.app-header h1 { color: #fff; font-size: 1.7rem; margin-bottom: 6px; }
.subtitle { color: rgba(255,255,255,0.85); font-size: 0.9rem; }

/* ═══ ★ 전체 정렬 통일 — 모든 행을 같은 폭·같은 간격으로 ═══ */
.pred-filter,
.level-filter,
.mode-switch,
.progress-bar,
.card,
.complete,
.btn-reset,
.stats {
  width: 100%;
  margin-left: 0;
  margin-right: 0;
}
.pred-filter  { margin-bottom: 10px; }
.level-filter { margin-bottom: 12px; }
.mode-switch  { margin-bottom: 12px; }
.progress-bar { margin-bottom: 14px; }

/* ═══ 술어 종류 선택 ═══ */
.pred-filter {
  background: transparent;
  box-shadow: none;
  border: none;
  padding: 0;
}
.pred-title {
  color: rgba(255,255,255,0.9);
  font-size: 0.78rem;
  display: block;
  margin-bottom: 7px;
  text-align: left;
}
.pred-btns {
  display: flex;
  gap: 6px;
}
.pred-btn {
  flex: 1;
  min-height: 48px;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  white-space: pre-line;
  background: rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.75);
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 10px;
  padding: 8px 2px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.2s;
  line-height: 1.25;
}
.pred-btn .sub { display: block; font-size: 0.62rem; opacity: 0.75; }
.pred-btn:hover { background: rgba(255,255,255,0.3); }
/* ★ 품사 버튼 활성화 — 밝은 파스텔 통일 */
.pred-btn.active#predNoun  { background:#e3f2fd; border-color:#90caf9; color:#1565c0; font-weight:bold; }
.pred-btn.active#predVerb  { background:#e3f6e9; border-color:#a5d6a7; color:#1b5e20; font-weight:bold; }
.pred-btn.active#predIAdj  { background:#ffe8ec; border-color:#f8a8bc; color:#c2185b; font-weight:bold; }
.pred-btn.active#predNaAdj { background:#fff3e0; border-color:#ffcc80; color:#e65100; font-weight:bold; }
.pred-btn.active#predAdv   { background:#ede7ff; border-color:#b39ddb; color:#4527a0; font-weight:bold; }

/* ═══ 레벨 선택 ═══ */
.level-filter { display: flex; gap: 6px; }
.level-btn {
  flex: 1;
  min-height: 44px;
  display: inline-flex;
  align-items: center;          /* 세로 중앙 정렬 */
  justify-content: center;
  background: rgba(255,255,255,0.2);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.4);
  padding: 8px 4px;
  font-size: 0.85rem;
  border-radius: 10px;
  transition: all 0.2s;
  line-height: 1.3;
}

.level-btn.active[data-level="all"] { background:#fff; border-color:#fff; color:#5b6bd5; }
.level-btn.active[data-level="N5"] { background:#7ed957; border-color:#7ed957; color:#1e4620; }
.level-btn.active[data-level="N4"] { background:#ffd93d; border-color:#ffd93d; color:#7a5c00; }
.level-btn.active[data-level="N3"] { background:#ff9f43; border-color:#ff9f43; color:#6b3300; }
.level-btn.active[data-level="N2"] { background:#ff6b6b; border-color:#ff6b6b; color:#fff; }
.level-btn.active[data-level="N1"] { background:#c56cf0; border-color:#c56cf0; color:#fff; }

/* ═══ 모드 전환 + 자동 타이머 ═══ */
.mode-switch {
  display: flex;
  justify-content: space-between;   /* 전환버튼 좌측 끝 ↔ 타이머 우측 끝 */
  align-items: center;
  gap: 10px;
}
.mode-btn {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.5);
  border-radius: 20px;
  padding: 9px 18px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s;
}
.mode-btn:hover { background: rgba(255,255,255,0.3); }
.mode-btn.active { background: #fff; color: #5b6bd5; border-color: #fff; font-weight: bold; }

/* ── 자동 다음 타이머 (흰색 캡슐) ── */
.auto-timer {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  padding: 7px 14px;
  background: rgba(255, 255, 255, 0.95);
  border-radius: 999px;
  box-shadow: 0 3px 12px rgba(0,0,0,0.15);
  margin-left: auto;
}
.at-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: #4c1d95;
  margin-right: 2px;
  white-space: nowrap;
}
.at-btn {
  padding: 4px 9px;
  border: 1.5px solid #ddd6fe;
  border-radius: 20px;
  background: #fff;
  color: #5b21b6;
  font-size: 0.74rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  white-space: nowrap;
}
.at-btn:hover { background: #ede9fe; }
.at-btn:active { transform: scale(0.95); }
.at-btn.active {
  background: #7c3aed;
  border-color: #7c3aed;
  color: #fff;
  box-shadow: 0 2px 8px rgba(124, 58, 237, 0.4);
}
.at-btn.off.active {
  background: #4c1d95;
  border-color: #4c1d95;
  color: #fff;
}

/* ═══ 진행바 ═══ */
.progress-bar {
  background: rgba(255,255,255,0.25);
  border-radius: 20px; height: 10px;
  overflow: hidden;
}
.progress-fill {
  background: linear-gradient(90deg,#ffd93d,#ff9f43);
  height: 100%; width: 0%;
  border-radius: 20px;
  transition: width 0.4s ease;
}

/* ═══ 카드 ═══ */
.card {
  background: #fff;
  border-radius: 24px;
  padding: 28px 26px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.25);
  animation: slideIn 0.4s ease;
  margin-bottom: 0;
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card-top { display: flex; gap: 8px; margin-bottom: 18px; }
.level-badge {
  background: #e8ecff; color: #5b6bd5;
  font-size: 0.75rem; font-weight: bold;
  padding: 4px 12px; border-radius: 12px;
}
.kind-badge { font-size: 0.75rem; font-weight: bold; padding: 4px 12px; border-radius: 12px; }
.kind-badge.k-verb  { background:#e3f6e9; color:#1b5e20; }
.kind-badge.k-iadj  { background:#ffe8ec; color:#c2185b; }
.kind-badge.k-naadj { background:#fff3e0; color:#e65100; }
.kind-badge.k-noun  { background:#e3f2fd; color:#1565c0; }
.kind-badge.k-adv   { background:#ede7ff; color:#4527a0; }

/* ═══ 일본어 명조체(Serif) 통일 ═══ */
.full-sentence,
.full-sentence.reverse-prompt,
.part .jp,
.particle-jp,
#wordReading,
.conj-form,
.conj-form ruby rt,
.full-sentence.word-mode ruby rt,
ruby rt {
  font-family: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", "MS Mincho", serif;
}

/* ── 한 줄 일본어 문장 ── */
.full-sentence {
  text-align: center;
  font-size: 2.1rem;
  font-weight: 700;
  color: #2d2d2d;
  line-height: 1.5;
  padding: 18px 8px 10px;
  margin-bottom: 20px;
  cursor: pointer;
  word-break: keep-all;
  letter-spacing: 0.04em;
}
.full-sentence:active { transform: scale(0.98); }
.full-sentence.reverse-prompt {
  font-size: 1.35rem;
  color: #5b6bd5;
  cursor: default;
  background: #f0f4ff;
  border-radius: 12px;
  padding: 18px 12px;
  margin-bottom: 28px;
}
.full-sentence.word-mode { font-size: 3rem; padding: 26px 8px 14px; }
.full-sentence.word-mode ruby rt {
  font-size: 14px;
  font-weight: 400;
  color: #7c6fd0;
  letter-spacing: 1px;
  opacity: 0.85;
}

.hint { text-align: center; color: #bbb; font-size: 0.75rem; margin-bottom: 18px; }

#revealBtn {
  display: none;
  margin: 0 auto 18px;
  padding: 12px 30px;
  background: linear-gradient(135deg, #ff9f43, #ff6b6b);
  color: #fff; border: none; border-radius: 12px;
  cursor: pointer; font-size: 0.95rem; font-weight: bold;
}
#revealBtn:hover { filter: brightness(1.08); }

/* ═══ 성분 분석: 주어 / 조사 / 술어 ═══ */
.parts { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.part {
  flex: 1; min-width: 90px;
  border-radius: 14px;
  padding: 13px 6px;
  text-align: center;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  overflow-wrap: break-word;
}
.part:hover { transform: translateY(-3px); box-shadow: 0 6px 16px rgba(0,0,0,0.12); }
.part.subject   { background: #f0f4ff; }
.part.particle-chip { background: #ffeef2; flex: 0 0 auto; min-width: 74px; }
.part.predicate { background: #e3f6e9; }
.part.subject.adv-mode {
  background: linear-gradient(135deg, #f3e8ff, #ede9fe);
  border-color: #c4b5fd;
}
.part .label { font-size: 0.68rem; color: #999; margin-bottom: 5px; }
.part .jp { font-size: 1.3rem; font-weight: bold; color: #333; }
.particle-jp { font-size: 1.5rem !important; color: #e0446e !important; }
.part .reading { font-size: 0.72rem; color: #888; margin-top: 2px; }
.part .ko { font-size: 0.82rem; color: #555; margin-top: 5px; }

.particle-tip {
  background: #fff8f0;
  border-left: 4px solid #ff9f43;
  border-radius: 10px;
  padding: 11px 14px;
  margin-bottom: 16px;
  font-size: 0.83rem;
  color: #7a5200;
  line-height: 1.55;
  word-break: keep-all;
}
.particle-tip strong { color: #e0446e; }

.translation-box {
  text-align: center;
  background: #f7f8fc;
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 18px;
  color: #444; font-size: 1rem;
  display: none;
  word-break: keep-all;
}
.translation-box.show { display: block; animation: fadeIn 0.3s; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ═══ 버튼 3개 ═══ */
.buttons { display: flex; gap: 10px; margin-top: 20px; }
button {
  border: none; border-radius: 12px;
  font-size: 0.95rem; font-weight: bold;
  cursor: pointer; transition: transform 0.1s;
}
.buttons button { flex: 1; padding: 14px; }
button:active { transform: scale(0.97); }

.btn-listen  { background: #5b6bd5; color: #fff; }
.btn-meaning { background: #eee; color: #555; }
.btn-next    { background: linear-gradient(135deg,#ffd93d,#ffc107); color: #7a5c00; }

/* ── 다음 버튼 안 진행바 (남은 시간) ── */
.btn-next { position: relative; overflow: hidden; }
.auto-progress {
  position: absolute;
  left: 0; bottom: 0;
  height: 4px;
  width: 0%;
  background: rgba(76, 29, 149, 0.45);
  pointer-events: none;
}

/* ═══ 진도 초기화 / 완료 화면 ═══ */
.btn-reset {
  background: transparent; color: #fff;
  border: 1px solid rgba(255,255,255,0.5);
  margin-top: 16px; padding: 12px;
}
.complete { text-align: center; color: #fff; display: none; }
.complete h2 { font-size: 2rem; margin-bottom: 12px; }
.complete p  { margin-bottom: 24px; }
.complete button { padding: 14px 36px; background: #fff; color: #5b6bd5; }

/* ═══ 활용 박스 (목록형 2열 그리드 — 중복 제거 통합본) ═══ */
.btn-conjugation {
  display: block; width: 100%;
  margin-top: 14px;
  margin-bottom: 12px;
  background: #e8ecff; color: #5b6bd5;
  padding: 12px;
}
#conjBox {
  display: none;
  margin-top: 12px;
  margin-bottom: 16px;
  border: 1px solid #ece7f8;
  border-radius: 14px;
  background: linear-gradient(180deg, #fbfaff 0%, #f6f2fc 100%);
  padding: 12px;
  box-shadow: 0 2px 10px rgba(120, 100, 180, 0.08);
}
#conjBox.show {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  animation: fadeIn 0.3s;
}
.conj-row {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  background: #fff;
  border: 1px solid #f0ebfa;
  border-radius: 10px;
  padding: 12px 14px;
  transition: transform .12s ease, box-shadow .12s ease;
}
.conj-row:hover {
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(120, 100, 180, 0.12);
}
.conj-label {
  font-size: 12px;
  color: #8a8496;
  letter-spacing: .02em;
}
.conj-label small {
  color: #b8b2c6;
  font-size: 11px;
  margin-left: 3px;
}
.conj-form {
  font-size: 21px;
  font-weight: 700;
  color: #2d2a35;
  text-align: right;
  line-height: 1.3;
}
.conj-form ruby rt {
  font-size: 10px;
  color: #9a94a8;
}
@media (max-width: 420px) {
  #conjBox.show { grid-template-columns: 1fr; }
  .conj-form { text-align: left; }
}

/* ═══ 통계 (맨 아래, 카드 폭과 동일) ═══ */
.stats {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}
.stat {
  flex: 1;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 16px;
  padding: 16px 10px;
  text-align: center;
  color: #fff;
}
.stat .num { font-size: 1.5rem; font-weight: bold; }
.stat .label { font-size: 0.75rem; opacity: 0.85; }

/* ═══ 반응형 ═══ */
@media (min-width: 768px) {
  .container { max-width: 720px; }
  .card { padding: 40px 38px; }
  .full-sentence { font-size: 2.6rem; }
}
@media (max-width: 480px) {
  body { padding: 12px; }
  .app-header h1 { font-size: 1.3rem; }
  .mode-btn { font-size: 0.72rem; padding: 8px 10px; }
  .level-filter { flex-wrap: wrap; }
  .level-btn { flex: 1 1 30%; font-size: 0.72rem; padding: 7px 2px; }
  .pred-btn { font-size: 0.66rem; padding: 7px 1px; }
  .card { padding: 22px 14px; }
  .full-sentence { font-size: 1.7rem; }
  .full-sentence.reverse-prompt { font-size: 1.1rem; }
  .full-sentence.word-mode { font-size: 2.3rem; }
  .part .jp { font-size: 1rem; }
  .mode-switch { flex-direction: column; gap: 8px; }
  .auto-timer { margin-left: 0; justify-content: center; }
  .at-btn { padding: 4px 7px; font-size: 0.68rem; }
}