/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --glass-bg: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.25);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  --accent: #007aff;
  --accent-glow: rgba(0, 122, 255, 0.4);
  --success: #34c759;
  --danger: #ff3b30;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --radius: 18px;
  --radius-sm: 12px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #0a0a2e 0%, #1a1a4e 30%, #0d1b3e 60%, #0a0a2e 100%);
  min-height: 100vh;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow-x: hidden;
}

/* ===== Animated Background Orbs ===== */
.bg-orbs {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 0;
}
.orb {
  position: absolute; border-radius: 50%; filter: blur(80px); opacity: 0.4;
  animation: float 20s ease-in-out infinite;
}
.orb:nth-child(1) { width: 400px; height: 400px; background: #007aff; top: -100px; left: -100px; animation-delay: 0s; }
.orb:nth-child(2) { width: 350px; height: 350px; background: #af52de; bottom: -120px; right: -80px; animation-delay: -7s; }
.orb:nth-child(3) { width: 300px; height: 300px; background: #5ac8fa; top: 50%; left: 50%; transform: translate(-50%,-50%); animation-delay: -14s; }
.orb:nth-child(4) { width: 250px; height: 250px; background: #ff375f; top: 20%; right: 10%; animation-delay: -3s; }

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(60px, -40px) scale(1.1); }
  50% { transform: translate(-30px, 50px) scale(0.95); }
  75% { transform: translate(-50px, -30px) scale(1.05); }
}

/* ===== Glass Card ===== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow), inset 0 1px 1px rgba(255,255,255,0.1);
}

.glass-sm {
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
}

/* ===== Container ===== */
.container {
  position: relative; z-index: 1;
  width: 100%; max-width: 900px; margin: 0 auto; padding: 20px;
}

/* ===== Auth Page ===== */
.auth-card {
  width: 420px; margin: 0 auto; padding: 40px; text-align: center;
}
.auth-card h1 { font-size: 2rem; font-weight: 700; margin-bottom: 6px; letter-spacing: -0.5px; }
.auth-card .subtitle { color: rgba(255,255,255,0.6); font-size: 0.95rem; margin-bottom: 30px; }

/* ===== Tabs ===== */
.tabs { display: flex; gap: 4px; margin-bottom: 24px; background: rgba(255,255,255,0.06); border-radius: 10px; padding: 4px; }
.tab-btn { flex: 1; padding: 10px; border: none; border-radius: 8px; cursor: pointer;
  background: transparent; color: rgba(255,255,255,0.5); font-size: 0.95rem; font-weight: 500; transition: all 0.3s; }
.tab-btn.active { background: rgba(255,255,255,0.2); color: #fff; }

/* ===== Form Elements ===== */
.form-group { margin-bottom: 18px; text-align: left; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 500; margin-bottom: 6px; color: rgba(255,255,255,0.7); }
.form-group input {
  width: 100%; padding: 13px 16px;
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.15);
  border-radius: 10px; color: #fff; font-size: 1rem; outline: none; transition: all 0.3s;
}
.form-group input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(0,122,255,0.2); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border: none; border-radius: 12px;
  font-size: 1rem; font-weight: 600; cursor: pointer; transition: all 0.3s;
}
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 24px var(--accent-glow); }
.btn-primary:active { transform: scale(0.98); }
.btn-ghost {
  background: rgba(255,255,255,0.1); color: #fff; border: 1px solid rgba(255,255,255,0.2);
}
.btn-ghost:hover { background: rgba(255,255,255,0.18); }
.btn-block { width: 100%; }
.btn-lg { padding: 16px 36px; font-size: 1.15rem; border-radius: 16px; }

/* ===== Navbar ===== */
.navbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; margin-bottom: 24px;
}
.back-to-main {
  color: rgba(255,255,255,0.55); text-decoration: none; font-size: 0.85rem;
  padding: 6px 14px; border: 1px solid rgba(255,255,255,0.18); border-radius: 8px;
  transition: all 0.2s; margin-right: 12px; white-space: nowrap;
}
.back-to-main:hover { color: #fff; border-color: rgba(255,255,255,0.4); background: rgba(255,255,255,0.08); }
.navbar .logo { font-size: 1.3rem; font-weight: 700; }
.navbar .user-info { display: flex; align-items: center; gap: 14px; }
.navbar .user-info span { color: rgba(255,255,255,0.7); font-size: 0.9rem; }
.navbar .btn-sm { padding: 8px 16px; font-size: 0.85rem; border-radius: 8px; }

/* ===== Dashboard ===== */
.stats-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 24px; }
.stat-card { padding: 24px; text-align: center; }
.stat-card .stat-value { font-size: 2.2rem; font-weight: 700; background: linear-gradient(135deg, #fff, #ccc); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-card .stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.5); margin-top: 4px; }

/* ===== Leaderboard ===== */
.leaderboard { padding: 24px; }
.leaderboard h2 { font-size: 1.2rem; margin-bottom: 20px; text-align: center; }
.leaderboard table { width: 100%; border-collapse: collapse; }
.leaderboard th { text-align: left; color: rgba(255,255,255,0.45); font-size: 0.8rem; font-weight: 500;
  text-transform: uppercase; letter-spacing: 1px; padding: 10px 12px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.leaderboard td { padding: 14px 12px; border-bottom: 1px solid rgba(255,255,255,0.06); font-size: 0.95rem; }
.leaderboard .rank { font-weight: 700; font-size: 1.1rem; }
.leaderboard .rank-1 { color: #ffd700; }
.leaderboard .rank-2 { color: #c0c0c0; }
.leaderboard .rank-3 { color: #cd7f32; }
.leaderboard tr:hover td { background: rgba(255,255,255,0.03); }
.leaderboard .me td { background: rgba(0,122,255,0.12) !important; }
.leaderboard .empty { text-align: center; color: rgba(255,255,255,0.35); padding: 40px; }

/* ===== Test Page ===== */
.test-card { padding: 32px; }
.test-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; flex-wrap: wrap; gap: 12px; }
.test-timer { font-size: 2.5rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.test-timer.running { color: var(--accent); }
.test-stats { display: flex; gap: 20px; }
.test-stat { text-align: center; }
.test-stat .val { font-size: 1.4rem; font-weight: 700; }
.test-stat .lbl { font-size: 0.75rem; color: rgba(255,255,255,0.45); }

.passage-display {
  padding: 24px; margin-bottom: 20px; min-height: 120px;
  font-size: 1.15rem; line-height: 1.9; letter-spacing: 0.3px;
  color: rgba(255,255,255,0.5); user-select: none; position: relative;
}
.passage-display .char { position: relative; transition: color 0.1s; }
.passage-display .char.correct { color: var(--success); }
.passage-display .char.incorrect { color: var(--danger); text-decoration: underline; }
.passage-display .char.current {
  color: #fff; background: rgba(0,122,255,0.35);
  border-radius: 2px; animation: blink 1s step-end infinite;
}
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0.5; } }

.test-input {
  width: 100%; min-height: 60px; padding: 16px;
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.15);
  border-radius: 10px; color: transparent; font-size: 1rem; resize: none;
  outline: none; position: absolute; opacity: 0; pointer-events: none;
}
.typing-area { position: relative; cursor: text; }
.typing-hint {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  color: rgba(255,255,255,0.3); font-size: 1rem; pointer-events: none;
  transition: opacity 0.3s;
}
.typing-area.active .typing-hint { opacity: 0; }

.test-actions { display: flex; gap: 12px; justify-content: center; margin-top: 16px; }

/* ===== Result Page ===== */
.result-card { padding: 40px; text-align: center; max-width: 600px; margin: 0 auto; }
.result-card h1 { font-size: 1.8rem; margin-bottom: 24px; }
.result-big { font-size: 5rem; font-weight: 800; line-height: 1;
  background: linear-gradient(135deg, #007aff, #5ac8fa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.result-big span { font-size: 1.4rem; -webkit-text-fill-color: rgba(255,255,255,0.5); }
.result-details { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 28px 0; }
.result-item { padding: 20px 12px; text-align: center; }
.result-item .val { font-size: 1.8rem; font-weight: 700; }
.result-item .lbl { font-size: 0.8rem; color: rgba(255,255,255,0.45); margin-top: 4px; }
.result-grade { display: inline-block; padding: 6px 20px; border-radius: 20px; font-weight: 700; font-size: 1rem; margin-top: 8px; }
.grade-s { background: rgba(255,215,0,0.2); color: #ffd700; }
.grade-a { background: rgba(0,122,255,0.2); color: #5ac8fa; }
.grade-b { background: rgba(52,199,89,0.2); color: #34c759; }
.grade-c { background: rgba(255,149,0,0.2); color: #ff9500; }
.grade-d { background: rgba(255,59,48,0.2); color: #ff3b30; }

/* ===== Animations ===== */
.fade-in { animation: fadeIn 0.5s ease-out; }
.slide-up { animation: slideUp 0.6s ease-out; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .auth-card { width: 100%; padding: 28px 20px; }
  .stats-row { grid-template-columns: 1fr; }
  .test-header { flex-direction: column; align-items: flex-start; }
  .result-details { grid-template-columns: 1fr; }
  .navbar { flex-direction: column; gap: 12px; text-align: center; }
  .passage-display { font-size: 1rem; }
}

/* ===== v2.1 Classroom / SQLite additions ===== */
.form-error { color:#ff3b30; font-size:0.85rem; margin-bottom:12px; display:none; }
.small-note { color:rgba(255,255,255,0.55); font-size:0.82rem; line-height:1.5; margin-top:10px; }
.warning-card { padding:16px 18px; margin-bottom:18px; display:flex; flex-direction:column; gap:8px; }
.password-row { display:flex; gap:10px; flex-wrap:wrap; margin-top:6px; }
.password-row input { flex:1; min-width:220px; padding:10px 12px; border-radius:10px; border:1px solid rgba(255,255,255,0.18); background:rgba(255,255,255,0.06); color:#fff; outline:none; }
.filter-card { display:grid; grid-template-columns:repeat(3, 1fr); gap:14px; padding:16px; margin-top:18px; }
.filter-group label { display:block; color:rgba(255,255,255,0.55); font-size:0.78rem; margin-bottom:6px; }
.filter-group select { width:100%; padding:10px 12px; border-radius:10px; border:1px solid rgba(255,255,255,0.16); background:rgba(10,10,35,0.55); color:#fff; outline:none; }
.analysis-card { margin-top:18px; padding:20px; }
.analysis-card h2 { font-size:1.05rem; margin-bottom:12px; }
.analysis-row { display:flex; gap:12px; flex-wrap:wrap; justify-content:center; }
.analysis-row span { padding:8px 12px; border-radius:999px; background:rgba(255,255,255,0.08); color:rgba(255,255,255,0.75); }
.good { color:#34c759 !important; }
.bad { color:#ff3b30 !important; }
.review { color:#ffcc00 !important; }
.passage-canvas { display:block; width:100%; border-radius:12px; background:rgba(255,255,255,0.04); border:1px solid rgba(255,255,255,0.10); user-select:none; -webkit-user-select:none; }
.passage-meta { margin-bottom:10px; color:rgba(255,255,255,0.55); font-size:0.85rem; text-transform:capitalize; }
.typed-title { color:rgba(255,255,255,0.48); font-size:0.8rem; margin:14px 0 6px; text-transform:uppercase; letter-spacing:0.08em; }
.typed-display { margin-top:0; padding:18px 20px; min-height:58px; max-height:160px; overflow:auto; font-size:1.05rem; line-height:1.8; border-radius:12px; background:rgba(255,255,255,0.05); border:1px solid rgba(255,255,255,0.08); color:rgba(255,255,255,0.9); word-break:break-word; white-space:pre-wrap; font-family:"SF Mono", "Consolas", "Courier New", monospace; }
.typed-display .correct { color:#34c759; }
.typed-display .incorrect { color:#ff3b30; text-decoration:underline; text-decoration-thickness:2px; }
.typed-display .cursor { display:inline-block; width:2px; height:1.2em; background:#007aff; animation:blink 1s step-end infinite; vertical-align:text-bottom; }
.test-input { width:100% !important; min-height:70px !important; margin-top:12px !important; padding:14px 16px !important; background:rgba(255,255,255,0.06) !important; border:1px solid rgba(255,255,255,0.15) !important; border-radius:10px !important; color:#fff !important; font-size:1rem !important; outline:none !important; font-family:inherit !important; resize:none !important; position:static !important; opacity:1 !important; pointer-events:auto !important; caret-color:#007aff; }
.test-input:focus { border-color:#007aff !important; box-shadow:0 0 0 3px rgba(0,122,255,0.2); }
.anti-cheat-note { color:rgba(255,255,255,0.42); font-size:0.78rem; text-align:center; margin-top:10px; }
.anti-status { margin:12px auto 0; padding:8px 14px; border-radius:999px; display:inline-block; background:rgba(255,255,255,0.08); font-size:0.9rem; }
.anti-status.review { color:#ffcc00; background:rgba(255,204,0,0.10); }
.mini-analysis { margin:10px 0 22px; }
.teacher-grid { display:grid; grid-template-columns:1fr 1.4fr; gap:18px; }
.teacher-panel { padding:22px; }
.teacher-head { display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:12px; }
.teacher-panel h2 { font-size:1.1rem; }
.teacher-panel h3 { margin:16px 0 8px; font-size:0.95rem; color:rgba(255,255,255,0.8); }
.teacher-list { display:flex; flex-direction:column; gap:8px; max-height:460px; overflow:auto; }
.teacher-row { display:flex; align-items:center; justify-content:space-between; gap:12px; padding:12px 14px; border-radius:12px; background:rgba(255,255,255,0.06); border:1px solid rgba(255,255,255,0.08); cursor:pointer; transition:background .2s, transform .2s; }
.teacher-row:hover { background:rgba(255,255,255,0.11); transform:translateY(-1px); }
.teacher-row span { display:block; color:rgba(255,255,255,0.5); font-size:0.78rem; margin-top:3px; }
.teacher-detail { color:rgba(255,255,255,0.78); }
.detail-stats { display:flex; flex-wrap:wrap; gap:10px; margin-bottom:12px; }
.detail-stats span { padding:8px 10px; border-radius:10px; background:rgba(255,255,255,0.06); }
.teacher-preview { max-height:220px; }
.teacher-table { width:100%; border-collapse:collapse; font-size:0.85rem; }
.teacher-table th, .teacher-table td { padding:9px 10px; border-bottom:1px solid rgba(255,255,255,0.08); text-align:left; }
.teacher-table th { color:rgba(255,255,255,0.45); text-transform:uppercase; letter-spacing:.05em; font-size:.72rem; }
.empty { color:rgba(255,255,255,0.38); text-align:center; padding:22px; }
@media (max-width:768px) {
  .filter-card, .teacher-grid { grid-template-columns:1fr; }
  .analysis-row { justify-content:flex-start; }
  .teacher-panel { padding:16px; }
  .typed-display { font-size:0.95rem; }
}

/* ===== v2.1.2 test UI simplification / refined passage rendering ===== */
.test-card { padding: 30px; overflow: hidden; }
.passage-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.075);
  border: 1px solid rgba(255,255,255,0.10);
  color: rgba(255,255,255,0.62);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
}
.passage-stage {
  position: relative;
  padding: 18px;
  border-radius: 22px;
  background:
    radial-gradient(circle at 18% 0%, rgba(90,200,250,0.18), transparent 38%),
    radial-gradient(circle at 100% 100%, rgba(175,82,222,0.16), transparent 34%),
    linear-gradient(145deg, rgba(255,255,255,0.105), rgba(255,255,255,0.040));
  border: 1px solid rgba(255,255,255,0.16);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.14), 0 14px 34px rgba(0,0,0,0.14);
  user-select: none;
  -webkit-user-select: none;
}
.passage-stage::after {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: 21px;
  pointer-events: none;
  background: linear-gradient(130deg, rgba(255,255,255,0.12), transparent 28%, transparent 70%, rgba(255,255,255,0.05));
}
.passage-stage-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin: 0 2px 12px;
  color: rgba(255,255,255,0.50);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.passage-label { font-weight: 700; color: rgba(255,255,255,0.66); }
.passage-progress {
  font-variant-numeric: tabular-nums;
  padding: 4px 9px;
  border-radius: 999px;
  background: rgba(0,0,0,0.16);
  color: rgba(255,255,255,0.62);
}
.passage-canvas {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  border-radius: 18px;
  background: transparent;
  border: 0;
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
  user-select: none;
  -webkit-user-select: none;
}
.test-input {
  margin-top: 16px !important;
  min-height: 96px !important;
  padding: 16px 18px !important;
  border-radius: 16px !important;
  background: rgba(255,255,255,0.075) !important;
  border: 1px solid rgba(255,255,255,0.18) !important;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08), 0 10px 26px rgba(0,0,0,0.10) !important;
  line-height: 1.65 !important;
}
.test-input::placeholder { color: rgba(255,255,255,0.34); }
.test-input:focus {
  border-color: rgba(0,122,255,0.70) !important;
  box-shadow: 0 0 0 3px rgba(0,122,255,0.22), inset 0 1px 0 rgba(255,255,255,0.08) !important;
}
@media (max-width:768px) {
  .test-card { padding: 20px; }
  .passage-stage { padding: 12px; border-radius: 18px; }
  .passage-stage::after { border-radius: 17px; }
  .passage-stage-head { font-size: 0.68rem; margin-bottom: 9px; }
  .test-input { min-height: 88px !important; }
}

/* ===== v2.1.3 classroom UX/admin refinements ===== */
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none !important; }
.btn-danger { background: rgba(255,59,48,0.16); color: #ff8a84; border: 1px solid rgba(255,59,48,0.28); }
.btn-danger:hover { background: rgba(255,59,48,0.24); }
.test-actions { display:flex; justify-content:center; gap:12px; flex-wrap:wrap; margin-top:16px; }
.completion-hint {
  margin: 12px auto 0;
  width: fit-content;
  padding: 8px 18px;
  border-radius: 999px;
  font-weight: 800;
  letter-spacing: .08em;
  animation: comboPop .45s cubic-bezier(.2,1.4,.4,1);
}
.completion-hint.combo { color:#5ac8fa; background:rgba(90,200,250,.13); border:1px solid rgba(90,200,250,.28); }
.completion-hint.perfect { color:#ffd86b; background:rgba(255,216,107,.15); border:1px solid rgba(255,216,107,.32); box-shadow:0 0 28px rgba(255,216,107,.16); }
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(3,5,24,0.46);
  backdrop-filter: blur(18px) saturate(1.2);
}
.pause-card {
  width: min(420px, 92vw);
  padding: 34px 28px;
  text-align: center;
  border-radius: 28px;
  background: linear-gradient(145deg, rgba(255,255,255,.16), rgba(255,255,255,.07));
  border: 1px solid rgba(255,255,255,.22);
  box-shadow: 0 24px 80px rgba(0,0,0,.32), inset 0 1px 0 rgba(255,255,255,.16);
}
.pause-icon {
  margin: 0 auto 14px;
  width: 64px;
  height: 64px;
  border-radius: 22px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size: 2rem;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(135deg, rgba(0,122,255,.86), rgba(90,200,250,.42));
  box-shadow: 0 12px 34px rgba(0,122,255,.26);
}
.pause-card h2 { margin-bottom: 8px; }
.pause-card p { color: rgba(255,255,255,.64); line-height: 1.6; margin-bottom: 22px; }
.combo-toast {
  position: fixed;
  left: 50%;
  top: 18%;
  transform: translateX(-50%);
  z-index: 1200;
  padding: 18px 34px;
  border-radius: 999px;
  font-weight: 900;
  font-size: clamp(1.3rem, 4vw, 2.4rem);
  letter-spacing: .08em;
  backdrop-filter: blur(16px) saturate(1.2);
  animation: comboFloat 2.2s ease forwards;
  pointer-events: none;
}
.combo-toast.combo { color:#dff5ff; background:rgba(0,122,255,.18); border:1px solid rgba(90,200,250,.34); box-shadow:0 18px 80px rgba(0,122,255,.28); }
.combo-toast.perfect { color:#fff3b0; background:rgba(255,204,0,.18); border:1px solid rgba(255,215,0,.38); box-shadow:0 18px 90px rgba(255,204,0,.28); }
@keyframes comboPop { from { opacity:0; transform:scale(.84); } to { opacity:1; transform:scale(1); } }
@keyframes comboFloat { 0% { opacity:0; transform:translate(-50%, 16px) scale(.8); } 16% { opacity:1; transform:translate(-50%, 0) scale(1.04); } 72% { opacity:1; transform:translate(-50%, -12px) scale(1); } 100% { opacity:0; transform:translate(-50%, -26px) scale(.96); } }
.teacher-admin-bar { margin-bottom: 18px; }
.teacher-tabs { display:flex; flex-wrap:wrap; gap:10px; margin-top:14px; }
.teacher-tab {
  border:1px solid rgba(255,255,255,.12);
  background:rgba(255,255,255,.06);
  color:rgba(255,255,255,.68);
  border-radius:999px;
  padding:9px 14px;
  cursor:pointer;
  font-weight:700;
}
.teacher-tab.active { background:rgba(0,122,255,.24); color:#fff; border-color:rgba(90,200,250,.34); }
.teacher-row.selected { outline: 2px solid rgba(90,200,250,.45); background:rgba(0,122,255,.15); }
.admin-form-grid {
  display:grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap:10px;
  margin-top:14px;
}
.admin-form-grid input, .admin-form-grid select, .admin-form-grid textarea, .batch-box {
  width:100%;
  padding:11px 12px;
  border-radius:12px;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.07);
  color:#fff;
  outline:none;
}
.admin-form-grid textarea { grid-column:1 / -1; min-height:140px; resize:vertical; line-height:1.55; }
.passages-grid { grid-template-columns: repeat(4, minmax(120px, 1fr)); }
.compact-list { margin-top:16px; max-height:360px; }
.batch-box { min-height:180px; font-family:"SF Mono", Consolas, monospace; line-height:1.55; }
.batch-result { margin-top:12px; max-height:240px; overflow:auto; padding:14px; border-radius:12px; background:rgba(0,0,0,.20); color:rgba(255,255,255,.72); white-space:pre-wrap; }
@media (max-width: 900px) {
  .admin-form-grid, .passages-grid { grid-template-columns:1fr; }
}

/* ===== v2.1.4 analytics, language switch, teacher click ops ===== */
.lang-toggle {
  position: fixed;
  top: 18px;
  right: 20px;
  z-index: 1300;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.10);
  color: rgba(255,255,255,.86);
  font-weight: 800;
  backdrop-filter: blur(16px) saturate(1.2);
  box-shadow: 0 10px 36px rgba(0,0,0,.18), inset 0 1px 0 rgba(255,255,255,.12);
  cursor: pointer;
}
.lang-toggle:hover { background: rgba(255,255,255,.16); transform: translateY(-1px); }
.result-rich-analysis {
  max-width: 920px;
  margin: 20px auto 0;
  padding: 26px;
  text-align: left;
}
.analytics-head { display:flex; align-items:flex-start; justify-content:space-between; gap:16px; margin-bottom:18px; }
.analytics-head h2 { font-size:1.25rem; margin-bottom:6px; }
.analytics-head p { color:rgba(255,255,255,.55); font-size:.9rem; }
.analytics-grid { display:grid; grid-template-columns:repeat(4, 1fr); gap:12px; margin:16px 0 22px; }
.analytics-metric { padding:16px; border-radius:18px; background:rgba(255,255,255,.065); border:1px solid rgba(255,255,255,.10); }
.analytics-metric b { display:block; font-size:1.7rem; color:#fff; }
.analytics-metric span { display:block; color:rgba(255,255,255,.52); font-size:.78rem; margin-top:4px; }
.chart-wrap { padding:12px; border-radius:18px; background:rgba(0,0,0,.16); border:1px solid rgba(255,255,255,.08); margin:12px 0 18px; overflow:hidden; }
#speed-chart { display:block; width:100%; height:230px; }
.analytics-table-wrap { overflow-x:auto; border-radius:16px; background:rgba(255,255,255,.035); border:1px solid rgba(255,255,255,.07); }
.row-actions { display:flex; align-items:center; justify-content:flex-end; gap:8px; flex-wrap:wrap; }
.row-actions > span { margin:0; white-space:nowrap; }
.admin-form-grid input[readonly] { opacity:.72; cursor:default; background:rgba(255,255,255,.045); }
.teacher-list.compact-list .teacher-row { cursor: pointer; }
@media (max-width: 768px) {
  .lang-toggle { top: 10px; right: 10px; padding: 8px 12px; }
  .analytics-grid { grid-template-columns:1fr 1fr; }
  .result-rich-analysis { padding:18px; }
  .row-actions { justify-content:flex-start; }
}

/* ===== v2.1.5 full-i18n/performance refinements ===== */
.result-rich-analysis {
  max-width: 600px;
  width: 100%;
}
.chart-wrap canvas { max-width: 100%; }
.teacher-list#teacher-users-management-list { max-height: 520px; }
.teacher-row b, .teacher-row span { line-height: 1.35; }
.btn.loading, .btn[aria-busy="true"] { pointer-events: none; opacity: .72; }

/* ===== v2.1.7 result layout + chart readability ===== */
.result-layout {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 600px) minmax(240px, 280px);
  gap: 20px;
  align-items: start;
}
.result-main-column { display: flex; flex-direction: column; gap: 20px; min-width: 0; }
.result-layout .result-card,
.result-layout .result-rich-analysis {
  width: 100%;
  max-width: none;
  margin: 0;
}
.result-side-card { padding: 24px 18px; min-height: 240px; text-align: left; }
.result-side-card h2 { font-size: 1.1rem; margin-bottom: 14px; }
.result-leaderboard-list { display: flex; flex-direction: column; gap: 8px; }
.result-rank-row {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  padding: 10px 10px;
  border-radius: 14px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
}
.result-rank-row.me { background: rgba(0,122,255,.18); border-color: rgba(90,200,250,.25); }
.result-rank-row b { display: block; font-size: .9rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.result-rank-row small { display: block; color: rgba(255,255,255,.48); font-size: .72rem; margin-top: 2px; }
.result-rank-row strong { font-size: .95rem; color: #fff; }
.teacher-chart-wrap { max-width: 100%; }
.chart-wrap { padding: 14px 16px 12px; }
#speed-chart, #teacher-speed-chart { display:block; width:100%; height:260px; }
@media (max-width: 860px) {
  .result-layout { grid-template-columns: 1fr; }
  .result-side-card { order: 3; }
}

/* ===== v2.2.0 PvP chase prototype ===== */
.dashboard-actions { text-align:center; margin-top:20px; display:flex; justify-content:center; gap:14px; flex-wrap:wrap; }
.pvp-shell { max-width: 980px; margin: 0 auto; padding: 28px; }
.pvp-topbar { display:flex; justify-content:space-between; gap:18px; align-items:flex-start; margin-bottom:20px; }
.pvp-topbar h1 { font-size: clamp(1.7rem, 4vw, 2.4rem); margin-bottom:8px; }
.pvp-room-badge { min-width:160px; padding:14px 18px; border-radius:22px; background:rgba(255,255,255,.075); border:1px solid rgba(255,255,255,.12); text-align:center; }
.pvp-room-badge span { display:block; color:rgba(255,255,255,.55); font-size:.8rem; margin-bottom:4px; }
.pvp-room-badge b { display:block; font-size:1.8rem; letter-spacing:.12em; }
.pvp-action-grid { display:grid; grid-template-columns: repeat(4, minmax(120px,1fr)); gap:12px; align-items:center; }
.pvp-role-picker { grid-column: span 4; display:flex; align-items:center; justify-content:space-between; gap:12px; padding:12px 14px; border-radius:18px; background:rgba(255,255,255,.065); border:1px solid rgba(255,255,255,.10); }
.pvp-role-picker span { color:rgba(255,255,255,.66); font-size:.88rem; font-weight:800; }
.pvp-role-picker select { min-width:150px; padding:10px 14px; border-radius:14px; border:1px solid rgba(255,255,255,.16); background:rgba(18,24,38,.88); color:#fff; font-weight:900; outline:none; }
.pvp-role-picker.compact { grid-column:auto; min-width:210px; padding:8px 11px; }
.pvp-role-picker.compact select { min-width:112px; padding:8px 10px; }
.pvp-join-box { display:flex; gap:8px; grid-column: span 2; }
.pvp-join-box input { flex:1; min-width:0; padding:12px 14px; border-radius:16px; border:1px solid rgba(255,255,255,.16); background:rgba(255,255,255,.08); color:#fff; outline:none; font-weight:800; letter-spacing:.08em; text-transform:uppercase; }
.pvp-status-card { margin-top:18px; min-height:46px; padding:14px 16px; border-radius:18px; background:rgba(255,255,255,.055); border:1px solid rgba(255,255,255,.09); color:rgba(255,255,255,.72); }
.pvp-hud { display:grid; grid-template-columns: repeat(3, 1fr); gap:10px; margin-bottom:16px; }
.pvp-hud > div { padding:13px 14px; border-radius:18px; background:rgba(255,255,255,.065); border:1px solid rgba(255,255,255,.10); }
.pvp-hud span { display:block; color:rgba(255,255,255,.54); font-size:.75rem; margin-bottom:4px; }
.pvp-hud b { font-size:1.05rem; color:#fff; }
.pvp-town { --pvp-world-shift:0px; --pvp-world-shift-slow:0px; position:relative; height:250px; border-radius:28px; overflow:hidden; margin:16px 0; border:1px solid rgba(255,255,255,.12); background:radial-gradient(circle at 20% 18%, rgba(255,255,255,.18), transparent 12%), radial-gradient(circle at 72% 28%, rgba(255,255,255,.10), transparent 14%), linear-gradient(180deg, rgba(78,132,178,.32), rgba(28,49,96,.66)); background-position:var(--pvp-world-shift-slow) 0, calc(var(--pvp-world-shift-slow) + 280px) 0, 0 0; box-shadow: inset 0 1px 0 rgba(255,255,255,.12); }
.pvp-town:before { content:""; position:absolute; inset:0; background:repeating-linear-gradient(90deg, transparent 0 70px, rgba(255,255,255,.08) 70px 72px, transparent 72px 160px), repeating-linear-gradient(90deg, rgba(255,255,255,.10) 0 54px, rgba(255,255,255,.04) 54px 96px, transparent 96px 190px); background-position:var(--pvp-world-shift-slow) 0, var(--pvp-world-shift) 0; opacity:.75; pointer-events:none; }
.pvp-road { position:absolute; left:-3%; right:-3%; bottom:54px; height:76px; background:linear-gradient(180deg, rgba(90,96,112,.9), rgba(45,50,67,.94)); transform:skewY(-2deg); border-top:3px solid rgba(255,255,255,.20); border-bottom:3px solid rgba(0,0,0,.18); }
.pvp-road:after { content:""; position:absolute; left:0; right:0; top:34px; height:4px; background:repeating-linear-gradient(90deg, rgba(255,255,255,.72) 0 34px, transparent 34px 64px); background-position:var(--pvp-world-shift) 0; opacity:.75; }
.pvp-building { position:absolute; bottom:128px; width:74px; height:72px; border-radius:12px 12px 4px 4px; background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.12); transform:translateX(var(--pvp-world-shift-slow)); transition:transform .18s linear; }
.pvp-building:after { content:""; position:absolute; inset:14px; background:repeating-linear-gradient(90deg, rgba(255,255,255,.22) 0 10px, transparent 10px 20px); }
.pvp-building.b1 { left:8%; height:66px; } .pvp-building.b2 { left:44%; width:92px; height:88px; } .pvp-building.b3 { right:8%; height:76px; }
.pvp-tree { position:absolute; bottom:120px; width:30px; height:52px; border-radius:999px 999px 8px 8px; background:rgba(48,209,88,.25); border:1px solid rgba(48,209,88,.24); transform:translateX(var(--pvp-world-shift-slow)); transition:transform .18s linear; }
.pvp-tree:after { content:""; position:absolute; left:12px; bottom:-28px; width:7px; height:30px; border-radius:8px; background:rgba(150,96,58,.55); }
.pvp-tree.t1 { left:28%; } .pvp-tree.t2 { right:28%; }
.pvp-runner { position:absolute; bottom:78px; transform:translateX(-50%); transition:left .22s ease-out; display:flex; flex-direction:column; align-items:center; gap:4px; z-index:3; }
.pvp-runner.me span { filter:drop-shadow(0 0 16px rgba(90,200,250,.60)) drop-shadow(0 10px 14px rgba(0,0,0,.28)); }
.pvp-runner.me em { background:rgba(0,122,255,.42); }
.pvp-town:after { content:""; position:absolute; left:50%; top:0; bottom:0; width:2px; background:linear-gradient(180deg, transparent, rgba(90,200,250,.45), transparent); opacity:.55; pointer-events:none; }
.pvp-runner span { font-size:2.7rem; filter:drop-shadow(0 10px 14px rgba(0,0,0,.28)); animation:pvpRun .42s ease-in-out infinite alternate; }
.pvp-runner em { font-style:normal; font-size:.76rem; font-weight:900; padding:4px 8px; border-radius:999px; background:rgba(0,0,0,.28); color:#fff; max-width:110px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.pvp-runner.thief { bottom:128px; }
@keyframes pvpRun { from { transform:translateY(0) rotate(-2deg); } to { transform:translateY(-4px) rotate(2deg); } }
.pvp-players { display:grid; grid-template-columns:repeat(2, 1fr); gap:12px; margin-bottom:14px; }
.pvp-player-card { padding:13px 15px; border-radius:18px; background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.09); }
.pvp-player-card.me { background:rgba(0,122,255,.16); border-color:rgba(90,200,250,.28); }
.pvp-player-card b { display:block; margin-bottom:4px; } .pvp-player-card span { color:rgba(255,255,255,.60); font-size:.86rem; }
.pvp-text-card { padding:16px; border-radius:22px; background:rgba(0,0,0,.16); border:1px solid rgba(255,255,255,.10); margin-top:12px; }
.pvp-text-head { display:flex; justify-content:space-between; color:rgba(255,255,255,.58); font-size:.84rem; margin-bottom:10px; }
.pvp-text { line-height:2; font-size:1.08rem; letter-spacing:.01em; user-select:none; overflow:hidden; white-space:nowrap; scroll-behavior:smooth; border-radius:16px; padding:10px 12px; background:rgba(255,255,255,.055); box-shadow:inset 0 1px 0 rgba(255,255,255,.08); }
.pvp-text-track { display:inline-block; min-width:100%; padding-right:45%; }
.pvp-text span { display:inline-block; padding:2px 1px; border-radius:5px; color:rgba(255,255,255,.72); }
.pvp-text span.ok { color:#d8ffe4; background:rgba(52,199,89,.20); }
.pvp-text span.bad { color:#ffd2d2; background:rgba(255,59,48,.26); }
.pvp-text span.current { outline:1px solid rgba(90,200,250,.55); background:rgba(90,200,250,.14); }
.pvp-text span.pvp-ellipsis { color:rgba(255,255,255,.32); padding:2px 10px; }
.pvp-input { margin-top:14px; }
.pvp-actions { display:flex; justify-content:center; gap:12px; margin-top:14px; flex-wrap:wrap; }
@media (max-width: 760px) {
  .pvp-shell { padding:18px; }
  .pvp-topbar, .pvp-join-box { flex-direction:column; }
  .pvp-action-grid { grid-template-columns:1fr; }
  .pvp-role-picker { grid-column:auto; flex-direction:column; align-items:stretch; }
  .pvp-join-box { grid-column:auto; }
  .pvp-hud, .pvp-players { grid-template-columns:1fr 1fr; }
  .pvp-town { height:220px; }
}

/* ===== v2.2.4 public dashboard chat ===== */
#view-main.container { max-width: 1180px; }
.dashboard-with-chat {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 330px);
  gap: 22px;
  align-items: start;
}
.dashboard-primary { min-width: 0; }
.public-chat {
  padding: 20px;
  height: min(640px, calc(100vh - 180px));
  min-height: 520px;
  max-height: calc(100vh - 180px);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 20px;
}
.public-chat-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.public-chat-head h2 { font-size: 1.1rem; margin-bottom: 4px; }
.public-chat-head p { color: rgba(255,255,255,.52); font-size: .78rem; line-height: 1.45; }
.chat-messages {
  flex: 1;
  height: 390px;
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 10px 6px 10px 0;
  scroll-behavior: smooth;
}
.chat-message {
  padding: 10px 12px;
  border-radius: 16px;
  background: rgba(255,255,255,.065);
  border: 1px solid rgba(255,255,255,.08);
}
.chat-message.me {
  background: rgba(0,122,255,.16);
  border-color: rgba(90,200,250,.26);
}
.chat-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 5px;
}
.chat-meta b {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: .86rem;
}
.chat-meta span {
  flex: none;
  color: rgba(255,255,255,.42);
  font-size: .72rem;
  font-variant-numeric: tabular-nums;
}
.chat-text {
  color: rgba(255,255,255,.84);
  font-size: .9rem;
  line-height: 1.45;
  word-break: break-word;
  white-space: pre-wrap;
}
.chat-form {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}
.chat-form input {
  flex: 1;
  min-width: 0;
  padding: 11px 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.075);
  color: #fff;
  outline: none;
}
.chat-form input:focus {
  border-color: rgba(0,122,255,.70);
  box-shadow: 0 0 0 3px rgba(0,122,255,.20);
}
.chat-form input::placeholder { color: rgba(255,255,255,.34); }
#chat-msg { min-height: 18px; margin-top: 8px; color: rgba(255,255,255,.48); }
.chat-refresh-btn { min-width: 64px; white-space: nowrap; padding-left: 12px; padding-right: 12px; font-size: .78rem; }
@media (max-width: 980px) {
  #view-main.container { max-width: 900px; }
  .dashboard-with-chat { grid-template-columns: 1fr; }
  .public-chat { position: static; height: 520px; max-height: none; min-height: 420px; }
}