/* ==========================================================
   MediTermBot 공통 스타일시트
   ========================================================== */
:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-navy: #1e2a4a;
  --color-navy-light: #26355c;
  --color-bg: #f4f6fb;
  --color-card: #ffffff;
  --color-border: #e5e9f2;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-success: #16a34a;
  --color-danger: #dc2626;
  --radius: 14px;
  --shadow: 0 4px 16px rgba(30, 42, 74, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Pretendard', 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
}

a { text-decoration: none; color: inherit; }

/* ---------- 로그인 페이지 ---------- */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 460px;
  background: var(--color-card);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 36px 32px;
}

.login-card h1 {
  text-align: center;
  font-size: 22px;
  margin-bottom: 24px;
}

.form-group { margin-bottom: 18px; }

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 14px;
  background: #fafbfe;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
}

.form-hint { font-size: 12px; color: var(--color-text-muted); margin-top: 4px; }

.btn {
  display: inline-block;
  width: 100%;
  padding: 13px;
  border-radius: 10px;
  border: none;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
}

.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); }
.btn-outline { background: #fff; border: 1px solid var(--color-border); color: var(--color-text); }
.btn-dark { background: #111827; color: #fff; }
.btn-sm { width: auto; padding: 8px 14px; font-size: 13px; }

.divider-text {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 13px;
  margin: 20px 0 12px;
}

.guest-box { text-align: center; margin: 16px 0; }
.guest-btn {
  display: inline-block; padding: 8px 16px; border-radius: 20px;
  border: 1px solid #93c5fd; color: var(--color-primary); font-weight: 600; font-size: 13px; cursor: pointer; background: #fff;
}

.prof-box {
  margin-top: 20px; padding: 16px; background: #f8fafc; border-radius: 12px; text-align: center;
}
.prof-box p { font-size: 12px; color: var(--color-text-muted); margin: 0 0 10px; }
.prof-box .row { display: flex; gap: 8px; }
.prof-box .row .btn { flex: 1; }

/* 모달 */
.modal-overlay {
  display: none; position: fixed; inset: 0; background: rgba(15,23,42,0.5);
  align-items: center; justify-content: center; z-index: 100; padding: 16px;
}
.modal-overlay.active { display: flex; }
.modal-box {
  background: #fff; border-radius: 16px; padding: 28px; width: 100%; max-width: 420px;
  box-shadow: var(--shadow);
}
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.modal-header h2 { font-size: 18px; margin: 0; }
.modal-close { cursor: pointer; font-size: 18px; color: var(--color-text-muted); background: none; border: none; }

.password-container { position: relative; display: flex; align-items: center; }
.password-container .form-control { padding-right: 40px; }
.toggle-password {
  position: absolute;
  right: 12px;
  top: 50%;                    /* 추가: 위에서 50% 위치 */
  transform: translateY(-50%); /* 추가: 수직 중앙에 완벽히 맞춤 */
  cursor: pointer;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  z-index: 10;
}

.alert { padding: 10px 14px; border-radius: 8px; font-size: 13px; margin-bottom: 14px; }
.alert-error { background: #fef2f2; color: var(--color-danger); border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: var(--color-success); border: 1px solid #bbf7d0; }

/* ---------- 대시보드 공통(레이아웃) ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 260px; background: var(--color-navy); color: #cbd5e1; flex-shrink: 0;
  display: flex; flex-direction: column; padding: 20px 16px; transition: width .2s ease;
}
.sidebar.collapsed { width: 72px; }
.sidebar.collapsed .label-text { display: none; }

.sidebar .brand {
  display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700;
  padding: 10px 8px 20px;
}

.side-menu { list-style: none; padding: 0; margin: 0; flex: 1; }
.side-menu li a, .side-menu li button {
  width: 100%; display: flex; align-items: center; gap: 10px; padding: 12px 12px;
  border-radius: 10px; color: #cbd5e1; font-size: 14px; margin-bottom: 6px; background: none; border: none; cursor: pointer;
  text-align: left; font-family: inherit;
}
.side-menu li a:hover, .side-menu li button:hover { background: var(--color-navy-light); color: #fff; }
.side-menu li a.active { background: var(--color-primary); color: #fff; }

.logout-btn {
  border: 1px solid #7f1d1d; color: #fca5a5; background: transparent;
  padding: 10px; border-radius: 10px; cursor: pointer; font-weight: 600; font-size: 13px;
}

.collapse-toggle {
  align-self: flex-start; background: var(--color-navy-light); border: none; color: #cbd5e1;
  width: 28px; height: 28px; border-radius: 50%; cursor: pointer; margin-top: 10px;
}

.main-content { flex: 1; padding: 28px 32px; overflow-x: hidden; }

.page-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 20px; flex-wrap: wrap; gap: 12px; }
.page-header h1 { font-size: 22px; margin: 0 0 4px; }
.page-header p { color: var(--color-text-muted); font-size: 13px; margin: 0; }

.card { background: var(--color-card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.card + .card { margin-top: 18px; }

.badge { display: inline-block; padding: 4px 10px; border-radius: 20px; font-size: 12px; font-weight: 700; }
.badge-pass { background: #dbeafe; color: var(--color-primary); }
.badge-fail { background: #fee2e2; color: var(--color-danger); }
.badge-neutral { background: #f1f5f9; color: var(--color-text-muted); }

.tabs { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.tab-btn {
  padding: 9px 16px; border-radius: 10px; border: 1px solid var(--color-border); background: #fff;
  cursor: pointer; font-size: 13px; font-weight: 600; color: var(--color-text-muted);
}
.tab-btn.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* 학생 성취 뱃지 (단원 클리어 / 주간 순위) - 물결(스캘럽) 가장자리 메달 */
.badge-row { display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; margin-top: 10px; align-items: flex-end; }
.badge-row-inline { display: inline-flex; gap: 6px; vertical-align: middle; margin-left: 8px; }

.badge-wavy {
  display: inline-block; vertical-align: middle;
  position: relative; width: 31px; height: 31px; cursor: default; transition: transform .18s;
}
.badge-wavy:hover { transform: translateY(-3px) scale(1.12); }
.badge-wavy.badge-rank-1, .badge-wavy.badge-rank-2, .badge-wavy.badge-rank-3 { width: 37px; height: 37px; }

.badge-wavy .wavy-svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }

/* 반짝임 스윕 (은은하게 원형 근사 - 물결 진폭이 작아 시각적으로 거의 티 안 남) */
.badge-wavy .badge-shine {
  position: absolute; inset: 8%; border-radius: 50%; overflow: hidden; pointer-events: none; z-index: 1;
}
.badge-wavy .badge-shine::after {
  content: ""; position: absolute; inset: -40%;
  background: linear-gradient(115deg, transparent 30%, rgba(255,255,255,0.6) 46%, rgba(255,255,255,0.18) 54%, transparent 65%);
  background-size: 220% 220%; background-position: 0% 0%;
  transition: background-position .5s ease;
}
.badge-wavy:hover .badge-shine::after { background-position: 100% 100%; }

.badge-wavy .badge-content {
  position: relative; z-index: 2; width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; color: #fff; font-size: 13px; pointer-events: none;
}
.badge-wavy.badge-rank-1 .badge-content, .badge-wavy.badge-rank-2 .badge-content, .badge-wavy.badge-rank-3 .badge-content {
  font-size: 17px;
}

/* 단원 클리어 뱃지: 주황/골드 */
.badge-chapter .wavy-svg path { filter: drop-shadow(0 2px 3px rgba(180,84,10,0.4)); }

/* 주간 순위 뱃지: 금/은/동 글로우 */
.badge-rank-1 .wavy-svg path { filter: drop-shadow(0 0 4px rgba(245,166,35,0.75)) drop-shadow(0 2px 3px rgba(180,110,10,0.4)); }
.badge-rank-2 .wavy-svg path { filter: drop-shadow(0 0 4px rgba(154,165,177,0.7)) drop-shadow(0 2px 3px rgba(90,98,107,0.4)); }
.badge-rank-3 .wavy-svg path { filter: drop-shadow(0 0 4px rgba(181,101,29,0.7)) drop-shadow(0 2px 3px rgba(110,60,15,0.4)); }

.badge-tooltip {
  visibility: hidden; opacity: 0; transition: opacity .15s; position: absolute; bottom: 118%; left: 50%;
  transform: translateX(-50%); background: #1e293b; color: #fff; font-size: 11px; font-weight: 500;
  padding: 5px 9px; border-radius: 6px; white-space: nowrap; z-index: 10;
}
.badge-wavy:hover .badge-tooltip { visibility: visible; opacity: 1; }

/* 표가 화면보다 넓어질 때(모바일 등) 표만 가로 스크롤 되도록 감싸는 컨테이너 */
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

table.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data-table th, table.data-table td { padding: 10px 14px; border-bottom: 1px solid var(--color-border); text-align: left; }
table.data-table th { color: var(--color-text-muted); font-weight: 700; background: #f8fafc; }
table.data-table td.col-num, table.data-table th.col-num { text-align: center; }
table.data-table tr.drill-row td { background: #f8fafc; color: #64748b; font-size: 12.5px; }
table.data-table tr.drill-row td:first-child { padding-left: 30px; }

/* 오류사항 접수: 내용 한 줄 말줄임 + 클릭해서 전체보기 */
.feedback-content-cell {
  max-width: 260px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  text-align: left; cursor: pointer; color: var(--color-primary);
}
.feedback-content-cell:hover { text-decoration: underline; }

/* 교수자 학습현황: 분반 카드 선택형 필터 */
.class-filter-card {
  background: #f8fafc; border-radius: 12px; padding: 14px 18px; min-width: 160px;
  cursor: pointer; border: 2px solid transparent; transition: border-color .15s, background .15s;
}
.class-filter-card:hover { border-color: #cbd5e1; }
.class-filter-card.selected { border-color: var(--color-primary); background: #eff6ff; }

/* 교수자 학습현황: 상세조회(단원/기간) 접기 아코디언 */
.advanced-filter-toggle {
  cursor: pointer; font-weight: 700; font-size: 14px; color: #1e293b;
  display: flex; justify-content: space-between; align-items: center; user-select: none;
}
.advanced-filter-toggle .toggle-arrow { font-size: 12px; transition: transform .2s; color: #94a3b8; }
.advanced-filter-toggle.open .toggle-arrow { transform: rotate(180deg); }
.advanced-filter-body { display: none; margin-top: 16px; }
.advanced-filter-body.open { display: block; }

.grid-2 { display: grid; grid-template-columns: 2fr 1fr; gap: 18px; }

.rank-item { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--color-border); }
.rank-num { width: 26px; height: 26px; border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 12px; }
.rank-1 { background: #f59e0b; } .rank-2 { background: #64748b; } .rank-3 { background: #dc2626; } .rank-other { background: #94a3b8; }
.rank-info { flex: 1; }
.rank-name { font-weight: 700; font-size: 14px; }
.rank-sub { font-size: 12px; color: var(--color-text-muted); }
.rank-score { font-size: 13px; font-weight: 700; color: var(--color-primary); }

.upload-drop {
  border: 2px dashed var(--color-border); border-radius: 14px; padding: 40px 20px; text-align: center;
  cursor: pointer; background: #fafbfe; margin-bottom: 16px;
}
.upload-drop:hover { border-color: var(--color-primary); }
.upload-icon { font-size: 34px; margin-bottom: 10px; }
.upload-note { background: #eff6ff; border: 1px solid #bfdbfe; border-radius: 10px; padding: 12px 16px; font-size: 13px; margin-bottom: 18px; color: #1e3a8a; }

/* ---------- 학생 대시보드 (게이지 + 학습영역) ---------- */
.student-shell { display: grid; grid-template-columns: 300px 1fr; gap: 20px; }
.gauge-panel { background: var(--color-navy); border-radius: var(--radius); color: #e2e8f0; padding: 18px; height: fit-content; }
.gauge-panel h3 { font-size: 14px; margin: 0 0 14px; color: #93c5fd; cursor: pointer; display: flex; justify-content: space-between; align-items: center; user-select: none; }
.gauge-panel h3 .toggle-arrow { font-size: 12px; transition: transform 0.2s; }
.gauge-panel h3.open .toggle-arrow { transform: rotate(180deg); }
.chapter-list-wrap { display: none; }
.chapter-list-wrap.open { display: block; }

.chapter-block { border-bottom: 1px solid rgba(255,255,255,0.08); padding: 10px 0; }
.chapter-title-row { display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-size: 13px; font-weight: 600; }
.progress-track { width: 100%; height: 6px; background: rgba(255,255,255,0.12); border-radius: 4px; margin-top: 8px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg,#3b82f6,#60a5fa); border-radius: 4px; }
.sub-gauges { display: none; margin-top: 10px; padding-left: 4px; }
.sub-gauges.open { display: block; }
.sub-gauge-row { display: flex; justify-content: space-between; font-size: 11.5px; color: #cbd5e1; margin-bottom: 6px; }

.report-link { display: block; margin-top: 16px; text-align: center; background: var(--color-primary); color: #fff; padding: 11px; border-radius: 10px; font-weight: 700; font-size: 13px; }

.learn-panel { background: var(--color-card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; }
.greeting-bar { background: var(--color-primary); color: #fff; border-radius: 12px; padding: 16px 20px; display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; flex-wrap: wrap; gap: 8px; }
.greeting-bar .chip { background: rgba(255,255,255,0.2); padding: 4px 10px; border-radius: 20px; font-size: 12px; }

.quest-card {
  background: #eff6ff; border-radius: 16px; padding: 40px 30px; text-align: center; position: relative; min-height: 260px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  cursor: pointer;
}
.quest-word-front { font-size: 42px; font-weight: 800; color: var(--color-primary); margin: 10px 0; }
.quest-word-front.flip { animation: popIn .35s ease; }
@keyframes popIn { from { transform: scale(0.7); opacity: 0; } to { transform: scale(1); opacity: 1; } }

/* 카드 플래시 - 카드 전체가 뒤집히는 3D 애니메이션 */
.quest-card.flippable {
  transition: transform 0.2s cubic-bezier(0.4, 0.2, 0.2, 1);
  cursor: pointer;
}
.quest-card.flippable.flip-half {
  transform: perspective(1000px) rotateY(90deg);
}
.quest-card.flippable.flip-reset {
  transform: perspective(1000px) rotateY(-90deg);
  transition: none;
}

.speaker-btn { position: absolute; top: 14px; right: 14px; background: #fff; border: 1px solid var(--color-border); border-radius: 50%; width: 34px; height: 34px; cursor: pointer; }

.quest-btn-row { display: flex; gap: 8px; justify-content: center; margin-top: 12px; flex-wrap: wrap; }
.hint-btn { background: #fff; border: 1px solid #bfdbfe; color: var(--color-primary); border-radius: 20px; padding: 6px 14px; font-size: 12px; cursor: pointer; }

/* 카드 안 인라인 힌트(예: 타이핑하기 패널)용 - 기본 숨김, .show 로 노출 */
.hint-image { max-width: 220px; margin-top: 14px; border-radius: 10px; display: none; }
.hint-image.show { display: block; }

/* 설명 보기 / 그림 힌트 레이어(모달) 내부 콘텐츠 - 모달 자체가 열림/닫힘을 제어하므로 항상 표시 */
.desc-box {
  max-width: 100%; text-align: center;
  font-size: 14px; line-height: 1.6; color: var(--color-text);
  background: #f8fafc; border: 1px solid var(--color-border); border-radius: 10px; padding: 14px 16px;
}
.hint-image-modal { display: block; max-width: 100%; border-radius: 10px; margin: 0 auto; }

.card-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 16px; }
.card-nav .count { font-size: 13px; color: var(--color-text-muted); }

.typing-input { width: 100%; padding: 14px; border-radius: 10px; border: 1px solid var(--color-border); font-size: 16px; text-align: center; margin-top: 16px; }
.result-msg { margin-top: 10px; font-weight: 700; font-size: 14px; }
.result-correct { color: var(--color-success); }
.result-wrong { color: var(--color-danger); }

.choice-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 18px; width: 100%; max-width: 480px; }
.choice-btn { padding: 14px; border-radius: 10px; border: 1px solid var(--color-border); background: #fff; cursor: pointer; font-size: 14px; }
.choice-btn.correct { background: #dcfce7; border-color: var(--color-success); }
.choice-btn.wrong { background: #fee2e2; border-color: var(--color-danger); }

/* ---------- 반응형 (모바일) ---------- */
@media (max-width: 960px) {
  .student-shell { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; align-items: center; padding: 10px 14px; overflow-x: auto; }
  .sidebar .brand { padding: 0 10px 0 0; }
  .side-menu { display: flex; flex: none; gap: 4px; }
  .side-menu li a, .side-menu li button { margin-bottom: 0; white-space: nowrap; }
  .collapse-toggle { display: none; }
  .main-content { padding: 16px; }
  .choice-list { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .login-card { padding: 26px 20px; }

  /* 버튼/탭 안의 아이콘(이모지)은 모바일 좁은 화면에서 숨겨서 한 줄로 보이게 함 */
  .btn-icon { display: none; }
}