/* 구글 폰트 Noto Sans KR 로드 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700&display=swap');

:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --text-main: #212529;
  --text-muted: #6c757d;
  --color-primary: #0f5132;
  --color-primary-light: #d1e7dd;
  --color-accent: #198754;
  --border-color: #dee2e6;
  --border-color-focus: #0f5132;
  --danger-color: #dc3545;
  --danger-color-light: #f8d7da;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --radius-sm: 4px;
  --radius-md: 8px;
  --transition-normal: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Noto Sans KR', sans-serif;
  letter-spacing: -0.02em;
}

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  background-color: var(--bg-secondary);
  color: var(--text-main);
  line-height: 1.6;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  position: fixed; /* 브라우저 자체의 바깥 전체 스크롤 및 줌인 방지 */
}

/* 전체 앱 레이아웃 */
#app-container {
  width: 100%;
  max-width: 480px;
  height: 100%;
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
  border-left: 1px solid var(--border-color);
  border-right: 1px solid var(--border-color);
}

/* 공통 헤더 */
header {
  height: 60px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background-color: var(--bg-primary);
  z-index: 10;
}

header .logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

header .logo::before {
  content: "📖";
}

header .right-icons button {
  background: none;
  border: none;
  font-size: 1.35rem;
  cursor: pointer;
  color: var(--text-main);
  padding: 6px;
  border-radius: var(--radius-sm);
  transition: var(--transition-normal);
}

header .right-icons button:hover {
  background-color: var(--bg-secondary);
  color: var(--color-primary);
}

/* 로그인 스크린 */
#login-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-primary);
  z-index: 100;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px 30px;
}

#login-screen .brand-info {
  text-align: center;
  margin-bottom: 40px;
}

#login-screen .brand-info h1 {
  font-size: 2rem;
  color: var(--color-primary);
  font-weight: 700;
  margin-bottom: 10px;
}

#login-screen .brand-info p {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.input-group {
  margin-bottom: 20px;
}

.input-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.input-group input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  outline: none;
  transition: var(--transition-normal);
  background-color: var(--bg-secondary);
}

.input-group input:focus {
  border-color: var(--border-color-focus);
  background-color: var(--bg-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.primary-btn {
  width: 100%;
  padding: 14px;
  background-color: var(--color-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-normal);
}

.primary-btn:hover {
  background-color: var(--color-accent);
}

/* 마이크 권한 동의 모달 */
.modal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.4);
  z-index: 200;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  background-color: var(--bg-primary);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 360px;
  padding: 24px;
  box-shadow: var(--shadow-md);
  transform: translateY(20px);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: center;
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-content h3 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-bottom: 12px;
  font-weight: 700;
}

.modal-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* 메인 콘텐츠 스크롤 영역 */
main {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  position: relative;
  background-color: var(--bg-secondary);
}

.tab-content {
  display: none;
  padding: 20px;
}

.tab-content.active {
  display: block;
}

/* 하단 네비게이션 탭바 */
footer {
  height: 65px;
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-primary);
  display: flex;
  z-index: 10;
}

.tab-btn {
  flex: 1;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  gap: 4px;
  transition: var(--transition-normal);
  position: relative;
}

.tab-btn:hover, .tab-btn.active {
  color: var(--color-primary);
}

.tab-btn .icon {
  font-size: 1.35rem;
}

/* 장바구니 동그라미 빨간 배지 */
.badge {
  position: absolute;
  top: 6px;
  right: 24%;
  background-color: var(--danger-color);
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 700;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
  display: none; /* Default hidden */
}

/* 검색 바 공통 스타일 */
.search-container {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.search-container input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  outline: none;
  background-color: var(--bg-primary);
  transition: var(--transition-normal);
}

.search-container input:focus {
  border-color: var(--border-color-focus);
}

.search-container button {
  padding: 10px 16px;
  background-color: var(--color-primary);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition-normal);
}

.search-container button:hover {
  background-color: var(--color-accent);
}

/* 리스트 항목 카드 공통 스타일 */
.card-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.item-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

.item-card:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

/* 키워드 리스트 스타일 (초성 분류별) */
.consonant-section {
  margin-bottom: 24px;
}

.consonant-header {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-primary-light);
  padding-bottom: 4px;
  margin-bottom: 12px;
}

.keyword-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.keyword-btn {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  padding: 12px;
  text-align: left;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition-normal);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.keyword-btn:hover {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

/* 질문장 탭 전용 스타일 (학습률 통계 및 메타데이터 정보) */
.stats-header {
  background-color: var(--color-primary-light);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid rgba(15, 81, 50, 0.15);
}

.stats-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stats-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}

.question-item {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.question-text {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
  word-break: keep-all;
}

.question-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.meta-badge {
  background-color: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.meta-badge.status-ok {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-color: rgba(15, 81, 50, 0.2);
}

.meta-badge.status-ng {
  background-color: var(--danger-color-light);
  color: var(--danger-color);
  border-color: rgba(220, 53, 69, 0.2);
}

.btn-row {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 4px;
}

.sm-btn {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-normal);
  background: none;
}

.sm-btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  border: 1px solid var(--color-primary);
}

.sm-btn-primary:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
}

.sm-btn-danger {
  background-color: var(--danger-color);
  color: #ffffff;
  border: 1px solid var(--danger-color);
}

.sm-btn-danger:hover {
  background-color: #b02a37;
  border-color: #b02a37;
}

/* 시험장 탭 전용 스타일 */
.basket-summary {
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 12px;
  color: var(--text-muted);
}

.basket-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.basket-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.order-btn {
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition-normal);
}

.order-btn:hover {
  background-color: var(--bg-secondary);
  color: var(--color-primary);
}

.試験-setup-panel {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-top: 24px;
  box-shadow: var(--shadow-sm);
}

.setup-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 6px;
}

.setup-form-group {
  margin-bottom: 14px;
}

.setup-form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 4px;
}

.setup-form-group select, .setup-form-group input {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  outline: none;
  font-size: 0.9rem;
}

.setup-form-group select:focus, .setup-form-group input:focus {
  border-color: var(--border-color-focus);
}

.details-wrapper {
  margin-bottom: 16px;
}

.details-wrapper summary {
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-primary);
  outline: none;
  padding: 4px 0;
}

.details-list {
  margin-top: 8px;
  padding-left: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  list-style-type: decimal;
}

.details-list li {
  margin-bottom: 4px;
}

/* 시험 모드 전체화면 스크린 */
#exam-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-primary);
  z-index: 150;
  display: none; /* JavaScript로 제어 */
  flex-direction: column;
  padding: 30px 24px;
}

.exam-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
}

.exam-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
}

.exam-progress {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

.exam-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: 20px;
}

/* 3D 플립형 시험 질문 카드 스타일 */
.exam-question-card {
  width: 100%;
  height: 180px; /* 높이를 고정하여 플립 효과의 공간 안정성 확보 */
  perspective: 1000px;
  background-color: transparent !important;
  border: none !important;
  box-shadow: none !important;
  padding: 0 !important;
  margin-bottom: 40px;
  cursor: pointer;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
}

.exam-question-card.flipped .card-inner {
  transform: rotateY(180deg);
}

.card-front, .card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.card-front {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-color: rgba(15, 81, 50, 0.25);
  transition: var(--transition-normal);
}

.card-front:hover {
  background-color: #c2e0d3;
}

.card-front .view-icon {
  font-size: 2.2rem;
  margin-bottom: 8px;
  animation: float 2s ease-in-out infinite;
}

.card-front .view-text {
  font-size: 0.95rem;
  font-weight: 700;
}

.card-back {
  background-color: var(--bg-secondary);
  transform: rotateY(180deg);
  overflow-y: auto;
  border-color: var(--color-primary);
}

.card-back h2 {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-main);
  word-break: keep-all;
  line-height: 1.6;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-4px); }
  100% { transform: translateY(0px); }
}

.audio-animation {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background-color: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  margin-bottom: 20px;
  transition: var(--transition-normal);
  box-shadow: 0 0 0 0px rgba(15, 81, 50, 0.2);
}

/* 재생중 및 녹음중 맥박 애니메이션 */
.audio-animation.playing {
  animation: pulse-green 1.5s infinite;
}

.audio-animation.recording {
  background-color: var(--danger-color-light);
  color: var(--danger-color);
  animation: pulse-red 1.5s infinite;
}

.exam-status-text {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.exam-status-text.recording {
  color: var(--danger-color);
}

.exam-timer {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}

.exam-timer.warning {
  color: var(--danger-color);
}

@keyframes pulse-green {
  0% { box-shadow: 0 0 0 0px rgba(15, 81, 50, 0.4); }
  70% { box-shadow: 0 0 0 15px rgba(15, 81, 50, 0); }
  100% { box-shadow: 0 0 0 0px rgba(15, 81, 50, 0); }
}

@keyframes pulse-red {
  0% { box-shadow: 0 0 0 0px rgba(220, 53, 69, 0.4); }
  70% { box-shadow: 0 0 0 15px rgba(220, 53, 69, 0); }
  100% { box-shadow: 0 0 0 0px rgba(220, 53, 69, 0); }
}

/* 확인해볼까요 (결과 스크린) */
#result-screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-primary);
  z-index: 160;
  display: none;
  flex-direction: column;
  padding: 30px 24px;
}

#result-screen .result-scroll {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: 20px;
}

.result-item-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 12px;
}

.result-item-title {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 12px;
  word-break: keep-all;
}

.player-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background-color: var(--bg-primary);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  margin-bottom: 12px;
}

.player-btn {
  background: none;
  border: none;
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
}

.player-progress {
  flex: 1;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: right;
}

.feedback-row {
  display: flex;
  gap: 8px;
}

.feedback-option {
  flex: 1;
  text-align: center;
}

.feedback-option input {
  display: none;
}

.feedback-option label {
  display: block;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  background-color: var(--bg-primary);
  transition: var(--transition-normal);
}

.feedback-option input:checked + label {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.feedback-option.bad input:checked + label {
  background-color: var(--danger-color-light);
  color: var(--danger-color);
  border-color: var(--danger-color);
}

/* 복습일기 (복습장) 슬라이드 모달 */
#review-modal {
  position: absolute;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100%;
  background-color: var(--bg-primary);
  z-index: 180;
  transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
}

#review-modal.active {
  right: 0;
}

#review-modal .modal-header {
  height: 60px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

#review-modal .modal-body {
  flex: 1;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 20px;
  background-color: var(--bg-secondary);
}

.toggle-sort-container {
  display: flex;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: var(--bg-primary);
  margin-bottom: 16px;
  overflow: hidden;
}

.toggle-sort-btn {
  flex: 1;
  background: none;
  border: none;
  padding: 10px;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition-normal);
}

.toggle-sort-btn.active {
  background-color: var(--color-primary);
  color: #ffffff;
}

/* 카드 디테일 오버레이 */
.review-card-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.4);
  z-index: 190;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.review-card-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.review-card-content {
  background-color: var(--bg-primary);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 400px;
  padding: 24px;
  box-shadow: var(--shadow-md);
  position: relative;
  transform: scale(0.9);
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.review-card-overlay.active .review-card-content {
  transform: scale(1);
}

.review-card-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
}

.review-card-close:hover {
  color: var(--text-main);
}

.review-card-title {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-main);
  margin-top: 10px;
  margin-bottom: 20px;
  word-break: keep-all;
  line-height: 1.6;
}

/* 토글 상태 스위치 */
.status-toggle-wrapper {
  display: flex;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-top: 20px;
}

.status-toggle-btn {
  flex: 1;
  padding: 10px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition-normal);
  text-align: center;
}

.status-toggle-btn.ok.active {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.status-toggle-btn.ng.active {
  background-color: var(--danger-color-light);
  color: var(--danger-color);
}

/* 얇고 긴 질문 추가하기 버튼 스타일 */
.long-add-btn {
  width: 100%;
  padding: 10px 12px;
  background-color: var(--bg-secondary);
  color: var(--color-primary);
  border: 1px dashed var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  margin-top: -6px;
  margin-bottom: 16px;
  transition: var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.long-add-btn:hover {
  background-color: var(--color-primary-light);
  border-style: solid;
  color: var(--color-primary);
}

/* 질문 추가 폼 스타일 */
.add-form-group {
  margin-bottom: 12px;
  text-align: left;
}

.add-form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.add-form-group input, .add-form-group textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  outline: none;
  font-size: 0.85rem;
  background-color: var(--bg-secondary);
  transition: var(--transition-normal);
}

.add-form-group input:focus, .add-form-group textarea:focus {
  border-color: var(--border-color-focus);
  background-color: var(--bg-primary);
}

.add-form-group textarea {
  resize: vertical;
  min-height: 60px;
}

/* -------------------------------------------------------------
   모바일 기기 및 뷰포트 최적화 미디어 쿼리 (App-like UX)
   ------------------------------------------------------------- */
@media screen and (max-width: 480px) {
  html, body {
    height: 100% !important;
    position: fixed;
  }
  
  #app-container {
    max-width: 100%;
    width: 100%;
    height: 100% !important;
    border-left: none;
    border-right: none;
    box-shadow: none;
  }

  /* Safe Area (iOS 홈 바 및 상단 노치) 대응 패딩 처리 */
  header {
    padding-top: env(safe-area-inset-top, 0px);
    height: calc(60px + env(safe-area-inset-top, 0px));
  }
  
  footer {
    padding-bottom: env(safe-area-inset-bottom, 0px);
    height: calc(65px + env(safe-area-inset-bottom, 0px));
  }
  
  #exam-screen {
    padding-top: calc(30px + env(safe-area-inset-top, 0px));
    padding-bottom: calc(30px + env(safe-area-inset-bottom, 0px));
  }
  
  #result-screen {
    padding-top: calc(30px + env(safe-area-inset-top, 0px));
    padding-bottom: calc(30px + env(safe-area-inset-bottom, 0px));
  }
  
  #review-modal {
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }
  
  #review-modal .modal-header {
    padding-top: env(safe-area-inset-top, 0px);
    height: calc(60px + env(safe-area-inset-top, 0px));
  }
  
  #login-screen {
    padding-top: calc(40px + env(safe-area-inset-top, 0px));
    padding-bottom: calc(40px + env(safe-area-inset-bottom, 0px));
  }
}

/* 팝업 모달 내부 스크롤 관성 최적화 */
#keyword-questions-container, #random-selected-list {
  -webkit-overflow-scrolling: touch;
}