/* =========================================
   BIOTRAINING ACADEMY — PEARL WHITE THEME
   Brand Colors:
   Primary Slate:  #4F5D65
   Accent Coral:   #FF7B7B
   Background:     #F8F6F3 (pearl white)
   ========================================= */

:root {
  --bg-main:      #F8F6F3;
  --bg-panel:     #FFFFFF;
  --bg-card:      #F2EFE9;
  --bg-hover:     #EDE9E2;
  --primary:      #4F5D65;
  --accent:       #FF7B7B;
  --accent-dark:  #e05a5a;
  --accent-glow:  rgba(255,123,123,0.25);
  --accent-light: rgba(255,123,123,0.1);
  --text-dark:    #1a1a2e;
  --text-body:    #3a3a4a;
  --text-muted:   #6b7280;
  --text-dim:     #9ca3af;
  --success:      #16a34a;
  --success-bg:   rgba(22,163,74,0.1);
  --warning:      #d97706;
  --warning-bg:   rgba(217,119,6,0.1);
  --error:        #dc2626;
  --error-bg:     rgba(220,38,38,0.1);
  --info:         #2563eb;
  --info-bg:      rgba(37,99,235,0.1);
  --border:       rgba(79,93,101,0.15);
  --border-light: rgba(79,93,101,0.08);
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:    0 4px 16px rgba(0,0,0,0.1), 0 2px 6px rgba(0,0,0,0.06);
  --shadow-lg:    0 12px 40px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.06);
  --sidebar-w:    300px;
  --gold:         #d97706;
  --radius:       14px;
}

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

html, body {
  background: var(--bg-main);
  color: var(--text-body);
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Inter', sans-serif;
  height: 100%;
  overflow: hidden;
}

#app { height:100vh; display:flex; flex-direction:column; }

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width:6px; height:6px; }
::-webkit-scrollbar-track { background: var(--bg-card); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius:3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent-dark); }

/* ══════════════════════════════
   AUTH SCREEN
══════════════════════════════ */
#auth-screen {
  display:flex; align-items:center; justify-content:center;
  min-height:100vh;
  background: linear-gradient(135deg, #fff5f5 0%, #F8F6F3 50%, #f0f4f8 100%);
  position:relative; overflow:hidden;
}

.auth-bg-decoration {
  position:absolute; inset:0; pointer-events:none; overflow:hidden;
}
.auth-blob {
  position:absolute; border-radius:50%;
  background: var(--accent); opacity:0.06;
  animation: blob-float 10s infinite ease-in-out;
}
@keyframes blob-float {
  0%,100% { transform:translateY(0) scale(1); }
  50% { transform:translateY(-25px) scale(1.1); }
}

.auth-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 52px 48px;
  width: 460px;
  max-width: 95vw;
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255,123,123,0.05);
  position:relative; z-index:1;
  animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
  from { opacity:0; transform:translateY(24px); }
  to   { opacity:1; transform:translateY(0); }
}

.logo-area { text-align:center; margin-bottom:36px; }

.logo-badge {
  display:inline-flex; align-items:center; justify-content:center;
  width:72px; height:72px; border-radius:20px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  margin-bottom:16px;
  box-shadow: 0 8px 24px var(--accent-glow);
}
.logo-badge i { font-size:32px; color:white; }

.logo-title { font-size:28px; font-weight:800; color:var(--primary); letter-spacing:-0.5px; }
.logo-title span { color:var(--accent); }
.logo-subtitle { font-size:11px; color:var(--text-muted); letter-spacing:3px; text-transform:uppercase; margin-top:6px; }

.auth-tabs {
  display:flex; gap:6px; margin-bottom:28px;
  background:var(--bg-card); padding:4px; border-radius:12px;
}
.auth-tab {
  flex:1; padding:11px; border:none; background:transparent;
  color:var(--text-muted); font-size:14px; font-weight:600;
  border-radius:9px; cursor:pointer; transition:all 0.25s;
}
.auth-tab.active {
  background:var(--accent); color:white;
  box-shadow:0 4px 12px var(--accent-glow);
}
.auth-tab:not(.active):hover { color:var(--accent); }

.form-group { margin-bottom:20px; }
.form-group label {
  display:block; font-size:13px; font-weight:600;
  color:var(--text-body); margin-bottom:8px;
}
.form-input {
  width:100%; padding:13px 16px;
  background:#FAFAFA; border:1.5px solid var(--border);
  border-radius:11px; color:var(--text-dark); font-size:15px;
  transition:all 0.25s; outline:none;
}
.form-input:focus {
  border-color:var(--accent); background:#fff;
  box-shadow:0 0 0 3px var(--accent-glow);
}
.form-input::placeholder { color:var(--text-dim); }

.btn-primary {
  width:100%; padding:15px;
  background:linear-gradient(135deg, var(--accent), var(--accent-dark));
  color:white; border:none; border-radius:12px;
  font-size:16px; font-weight:700;
  cursor:pointer; transition:all 0.25s;
  box-shadow:0 4px 14px var(--accent-glow);
}
.btn-primary:hover { transform:translateY(-1px); box-shadow:0 8px 24px var(--accent-glow); }
.btn-primary:active { transform:translateY(0); }
.btn-primary:disabled { opacity:0.6; cursor:not-allowed; transform:none; }

.auth-message {
  font-size:13px; text-align:center; margin-top:14px;
  padding:11px 14px; border-radius:10px; font-weight:500;
}
.auth-message.error   { background:var(--error-bg); color:var(--error); border:1px solid rgba(220,38,38,0.2); }
.auth-message.success { background:var(--success-bg); color:var(--success); border:1px solid rgba(22,163,74,0.2); }
.auth-message.info    { background:var(--info-bg); color:var(--info); border:1px solid rgba(37,99,235,0.2); }

/* ══════════════════════════════
   MAIN APP LAYOUT
══════════════════════════════ */
#main-app { display:flex; flex-direction:column; height:100vh; overflow:hidden; }

/* ─── TOP HEADER ─── */
.top-header {
  height:64px;
  background:#fff;
  border-bottom:1px solid var(--border);
  display:flex; align-items:center; padding:0 24px;
  gap:16px; flex-shrink:0; z-index:100;
  box-shadow: var(--shadow-sm);
}

.header-logo { display:flex; align-items:center; gap:12px; text-decoration:none; }
.header-logo-icon {
  width:38px; height:38px; border-radius:11px;
  background:linear-gradient(135deg, var(--accent), var(--accent-dark));
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 4px 10px var(--accent-glow);
}
.header-logo-icon i { color:white; font-size:16px; }
.header-logo-text { font-size:17px; font-weight:800; color:var(--primary); }
.header-logo-text span { color:var(--accent); }

.header-spacer { flex:1; }

.header-user { display:flex; align-items:center; gap:10px; }
.header-avatar {
  width:36px; height:36px; border-radius:50%;
  background:linear-gradient(135deg, var(--accent), var(--accent-dark));
  display:flex; align-items:center; justify-content:center;
  font-size:14px; font-weight:700; color:white;
  box-shadow:0 2px 8px var(--accent-glow);
}
.header-name { font-size:14px; font-weight:700; color:var(--text-dark); }
.header-role { font-size:11px; color:var(--text-muted); }

.btn-logout {
  padding:8px 16px;
  background:transparent; border:1.5px solid var(--border);
  border-radius:9px; color:var(--text-muted);
  font-size:13px; font-weight:600; cursor:pointer; transition:all 0.2s;
}
.btn-logout:hover { border-color:var(--accent); color:var(--accent); background:var(--accent-light); }

.btn-secondary {
  padding:10px 22px;
  background:#fff; border:1.5px solid var(--border);
  border-radius:10px; color:var(--text-body);
  font-size:14px; font-weight:600; cursor:pointer; transition:all 0.2s;
}
.btn-secondary:hover { border-color:var(--accent); color:var(--accent); background:var(--accent-light); }

/* ─── BODY LAYOUT ─── */
.app-body { display:flex; flex:1; overflow:hidden; }

/* ══════════════════════════════
   SIDEBAR
══════════════════════════════ */
.sidebar {
  width:var(--sidebar-w);
  background:#fff;
  border-right:1px solid var(--border);
  display:flex; flex-direction:column;
  overflow-y:auto; flex-shrink:0;
}

.sidebar-header {
  padding:20px 18px 14px;
  border-bottom:1px solid var(--border-light);
  background:#fff;
  position:sticky; top:0; z-index:10;
}

.sidebar-title {
  font-size:10px; font-weight:800; color:var(--text-muted);
  letter-spacing:2px; text-transform:uppercase; margin-bottom:12px;
}

.overall-progress {
  padding:14px 16px;
  background:var(--bg-card); border-radius:12px;
  border:1px solid var(--border-light);
}
.progress-label {
  font-size:12px; color:var(--text-muted); margin-bottom:8px;
  display:flex; justify-content:space-between; font-weight:600;
}
.progress-bar-outer { height:8px; background:var(--bg-hover); border-radius:4px; }
.progress-bar-inner {
  height:100%; border-radius:4px;
  background:linear-gradient(90deg, var(--accent), var(--accent-dark));
  transition:width 0.8s ease;
}

.module-list { padding:10px 10px; flex:1; }

.module-item {
  display:flex; align-items:center; gap:10px;
  padding:10px 12px; border-radius:12px; cursor:pointer;
  margin-bottom:4px; transition:all 0.2s;
  border:1.5px solid transparent;
}
.module-item:hover { background:var(--bg-card); border-color:var(--border); }
.module-item.active {
  background:var(--accent-light);
  border-color:var(--accent);
}
.module-item.completed { border-color:rgba(22,163,74,0.25); background:rgba(22,163,74,0.04); }

.module-num {
  width:30px; height:30px; border-radius:9px; flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  font-size:12px; font-weight:700;
  background:var(--bg-card); color:var(--text-muted);
  border:1.5px solid var(--border);
}
.module-item.active .module-num { background:var(--accent); color:white; border-color:var(--accent); }
.module-item.completed .module-num { background:var(--success); color:white; border-color:var(--success); }

.module-info { flex:1; min-width:0; }
.module-name {
  font-size:12px; font-weight:700; color:var(--text-dark);
  line-height:1.3; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.module-item.active .module-name { color:var(--accent-dark); }
.module-status { font-size:10px; margin-top:3px; font-weight:600; }
.module-status.not-started { color:var(--text-dim); }
.module-status.in-progress { color:var(--warning); }
.module-status.completed   { color:var(--success); }

.module-score-badge {
  font-size:11px; font-weight:700; padding:2px 8px;
  border-radius:20px; flex-shrink:0;
}
.module-score-badge.distinction { background:rgba(217,119,6,0.15); color:var(--gold); }
.module-score-badge.excellent   { background:var(--success-bg); color:var(--success); }
.module-score-badge.good        { background:var(--info-bg); color:var(--info); }
.module-score-badge.pass        { background:var(--warning-bg); color:var(--warning); }

/* ══════════════════════════════
   MAIN CONTENT
══════════════════════════════ */
.main-content {
  flex:1; overflow-y:auto; background:var(--bg-main);
  display:flex; flex-direction:column;
}

/* ══════════════════════════════
   DASHBOARD
══════════════════════════════ */
.dashboard { padding:32px 40px; max-width:960px; }

.welcome-hero {
  background:linear-gradient(135deg, #fff5f5 0%, #fff 60%, #f5f8ff 100%);
  border:1.5px solid var(--border);
  border-left:4px solid var(--accent);
  border-radius:20px; padding:32px 36px; margin-bottom:28px;
  position:relative; overflow:hidden;
  box-shadow:var(--shadow-sm);
}
.welcome-hero::after {
  content:''; position:absolute; top:-40px; right:-40px;
  width:180px; height:180px; border-radius:50%;
  background:radial-gradient(circle, var(--accent-glow), transparent);
  pointer-events:none;
}
.welcome-title { font-size:26px; font-weight:800; color:var(--text-dark); margin-bottom:6px; }
.welcome-title span { color:var(--accent); }
.welcome-subtitle { font-size:14px; color:var(--text-muted); line-height:1.7; max-width:600px; }

.stats-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-bottom:28px; }
.stat-card {
  background:#fff; border:1.5px solid var(--border);
  border-radius:16px; padding:22px 18px; text-align:center;
  transition:all 0.25s; box-shadow:var(--shadow-sm);
}
.stat-card:hover { border-color:var(--accent); transform:translateY(-2px); box-shadow:var(--shadow-md); }
.stat-value { font-size:30px; font-weight:900; color:var(--accent); }
.stat-label { font-size:12px; color:var(--text-muted); margin-top:4px; font-weight:600; }

.section-title {
  font-size:15px; font-weight:800; color:var(--text-dark);
  margin-bottom:16px; display:flex; align-items:center; gap:8px;
}
.section-title i { color:var(--accent); }

.dash-module-grid { display:grid; grid-template-columns:1fr 1fr; gap:14px; }

.dash-module-card {
  background:#fff; border:1.5px solid var(--border);
  border-radius:14px; padding:20px; cursor:pointer;
  transition:all 0.25s; box-shadow:var(--shadow-sm);
}
.dash-module-card:hover { border-color:var(--accent); transform:translateY(-2px); box-shadow:var(--shadow-md); }
.dash-module-card.done { border-color:rgba(22,163,74,0.3); background:rgba(22,163,74,0.03); }

.dash-module-icon { font-size:28px; margin-bottom:10px; }
.dash-module-title { font-size:13px; font-weight:700; color:var(--text-dark); margin-bottom:6px; }
.dash-module-desc  { font-size:12px; color:var(--text-muted); line-height:1.5; }
.dash-module-status {
  display:inline-block; margin-top:10px;
  font-size:11px; font-weight:700; padding:3px 10px; border-radius:20px;
}
.dash-module-status.not-started { background:var(--bg-card); color:var(--text-dim); }
.dash-module-status.in-progress  { background:var(--warning-bg); color:var(--warning); }
.dash-module-status.completed    { background:var(--success-bg); color:var(--success); }

.cert-banner {
  background:linear-gradient(135deg, #fffbeb, #fff9f0);
  border:2px solid #d97706; border-radius:16px; padding:24px 28px;
  margin-bottom:28px; cursor:pointer; transition:all 0.25s;
  display:flex; align-items:center; gap:20px;
  box-shadow:0 4px 16px rgba(217,119,6,0.15);
}
.cert-banner:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(217,119,6,0.2); }

/* ══════════════════════════════
   MODULE VIEW
══════════════════════════════ */
.module-view { padding:32px 40px; max-width:900px; }

.module-header {
  background:linear-gradient(135deg, #fff5f5 0%, #fff 70%);
  border:1.5px solid var(--border);
  border-left:5px solid var(--accent);
  border-radius:18px; padding:28px 32px; margin-bottom:24px;
  box-shadow:var(--shadow-sm);
}
.module-chapter {
  font-size:11px; font-weight:800; color:var(--accent);
  letter-spacing:2.5px; text-transform:uppercase; margin-bottom:8px;
}
.module-title { font-size:24px; font-weight:800; color:var(--text-dark); margin-bottom:8px; }
.module-desc   { font-size:14px; color:var(--text-muted); line-height:1.7; }

/* ─── MODULE NAV TABS ─── */
.module-nav-tabs {
  display:flex; gap:8px; margin-bottom:24px;
  background:#fff; padding:6px; border-radius:14px;
  border:1.5px solid var(--border); box-shadow:var(--shadow-sm);
}
.module-tab {
  flex:1; padding:11px 14px; border:none; background:transparent;
  color:var(--text-muted); font-size:13px; font-weight:600;
  border-radius:10px; cursor:pointer; transition:all 0.25s;
  display:flex; align-items:center; justify-content:center; gap:7px;
}
.module-tab.active { background:var(--accent); color:white; box-shadow:0 4px 12px var(--accent-glow); }
.module-tab:not(.active):hover { background:var(--bg-card); color:var(--text-dark); }

/* ─── CONTENT SECTIONS ─── */
.content-section { animation:fadeInUp 0.4s ease; }

.content-card {
  background:#fff; border:1.5px solid var(--border);
  border-radius:16px; padding:26px; margin-bottom:20px;
  box-shadow:var(--shadow-sm);
}
.content-card-title {
  font-size:15px; font-weight:800; color:var(--primary);
  margin-bottom:18px; display:flex; align-items:center; gap:9px;
  padding-bottom:14px; border-bottom:1.5px solid var(--border-light);
}
.content-card-title i { color:var(--accent); }

.key-point {
  display:flex; align-items:flex-start; gap:12px;
  padding:13px 16px; background:var(--bg-card); border-radius:11px;
  margin-bottom:9px; border-left:4px solid var(--accent);
}
.key-point-icon { color:var(--accent); font-size:15px; flex-shrink:0; margin-top:2px; }
.key-point-text { font-size:14px; line-height:1.7; color:var(--text-body); }
.key-point-text strong { color:var(--primary); }

.concept-grid { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.concept-card {
  background:var(--bg-card); border:1.5px solid var(--border-light);
  border-radius:13px; padding:18px; transition:all 0.25s;
}
.concept-card:hover { border-color:var(--accent); box-shadow:var(--shadow-sm); }
.concept-card-icon  { font-size:26px; margin-bottom:10px; }
.concept-card-title { font-size:13px; font-weight:800; color:var(--primary); margin-bottom:6px; }
.concept-card-text  { font-size:13px; color:var(--text-muted); line-height:1.6; }

.quote-block {
  background:linear-gradient(135deg, #fff5f5, #fff9f5);
  border:1.5px solid rgba(255,123,123,0.25); border-radius:14px;
  padding:22px 26px; position:relative; margin:16px 0;
}
.quote-block::before {
  content:'"'; font-size:72px; color:var(--accent); opacity:0.2;
  position:absolute; top:-12px; left:18px; font-family:Georgia;
  line-height:1;
}
.quote-text { font-size:16px; font-style:italic; color:var(--text-dark); line-height:1.8; padding-left:10px; }
.quote-source { font-size:12px; color:var(--accent); font-weight:700; margin-top:10px; text-align:right; }

.info-table { width:100%; border-collapse:collapse; }
.info-table th {
  background:rgba(79,93,101,0.08); color:var(--primary);
  font-size:12px; font-weight:800; text-transform:uppercase;
  letter-spacing:0.5px; padding:12px 16px; text-align:left;
}
.info-table td {
  padding:11px 16px; font-size:13px; color:var(--text-body);
  border-bottom:1px solid var(--border-light);
}
.info-table tr:hover td { background:var(--bg-card); }
.info-table tr:last-child td { border-bottom:none; }

.process-steps { }
.process-step { display:flex; gap:16px; margin-bottom:18px; }
.step-num {
  width:34px; height:34px; border-radius:50%; flex-shrink:0;
  background:var(--accent); color:white;
  display:flex; align-items:center; justify-content:center;
  font-size:14px; font-weight:800;
  box-shadow:0 4px 10px var(--accent-glow);
}
.step-content { flex:1; padding-top:5px; }
.step-title { font-size:14px; font-weight:700; color:var(--text-dark); margin-bottom:5px; }
.step-text  { font-size:13px; color:var(--text-muted); line-height:1.6; }

/* ══════════════════════════════
   KEY POINTS SUMMARY
══════════════════════════════ */
.key-points-summary {
  background:linear-gradient(135deg, #fffbeb, #fff);
  border:2px solid rgba(217,119,6,0.2); border-radius:16px;
  padding:28px; margin-bottom:20px; box-shadow:var(--shadow-sm);
}
.kp-title {
  font-size:17px; font-weight:800; color:var(--text-dark);
  margin-bottom:20px; display:flex; align-items:center; gap:10px;
}
.kp-title i { color:var(--gold); }
.kp-item { display:flex; align-items:flex-start; gap:12px; margin-bottom:12px; }
.kp-bullet {
  width:8px; height:8px; border-radius:50%;
  background:var(--accent); flex-shrink:0; margin-top:7px;
}
.kp-text { font-size:14px; color:var(--text-body); line-height:1.7; }

.kp-ready-cta {
  text-align:center; padding:24px;
  background:#fff; border:1.5px solid var(--border);
  border-radius:16px; box-shadow:var(--shadow-sm);
}

/* ══════════════════════════════
   QUIZ
══════════════════════════════ */
.quiz-section { animation:fadeInUp 0.4s ease; }

.quiz-header-info {
  background:#fff; border:1.5px solid var(--border);
  border-radius:16px; padding:20px 24px; margin-bottom:20px;
  box-shadow:var(--shadow-sm); display:flex; align-items:center;
  gap:16px; justify-content:space-between;
}
.quiz-header-info .quiz-info-text { font-size:14px; color:var(--text-muted); }
.quiz-header-info .quiz-info-text strong { color:var(--text-dark); }

.quiz-progress-wrap { margin-bottom:24px; }
.quiz-progress-label {
  display:flex; justify-content:space-between;
  font-size:12px; font-weight:700; color:var(--text-muted); margin-bottom:8px;
}
.quiz-progress-bar {
  height:8px; background:var(--bg-card); border-radius:4px; overflow:hidden;
  border:1px solid var(--border-light);
}
.quiz-progress-fill {
  height:100%; border-radius:4px;
  background:linear-gradient(90deg, var(--accent), var(--accent-dark));
  transition:width 0.5s ease;
}

.question-card {
  background:#fff; border:1.5px solid var(--border);
  border-radius:16px; padding:28px; margin-bottom:20px;
  box-shadow:var(--shadow-sm); transition:all 0.2s;
}
.question-card:hover { box-shadow:var(--shadow-md); }

.question-num {
  font-size:11px; font-weight:800; color:var(--accent);
  letter-spacing:1.5px; text-transform:uppercase; margin-bottom:10px;
  display:flex; align-items:center; gap:8px;
}
.question-type-badge {
  background:var(--accent-light); color:var(--accent-dark);
  padding:2px 9px; border-radius:20px; font-size:10px; font-weight:700;
}

.question-text {
  font-size:16px; font-weight:700; color:var(--text-dark);
  line-height:1.65; margin-bottom:20px;
}
.question-hint {
  font-size:12px; color:var(--text-muted); margin-bottom:16px;
  padding:10px 14px; background:var(--info-bg); border-radius:9px;
  border-left:3px solid var(--info); display:flex; align-items:center; gap:8px;
}

/* MCQ */
.mcq-options { display:grid; gap:10px; }
.mcq-option {
  display:flex; align-items:center; gap:14px;
  padding:15px 18px; background:var(--bg-card);
  border:1.5px solid var(--border); border-radius:12px;
  cursor:pointer; transition:all 0.2s;
}
.mcq-option:hover { border-color:var(--accent); background:#fff5f5; }
.mcq-option.selected { border-color:var(--accent); background:#fff5f5; box-shadow:0 2px 8px var(--accent-glow); }
.mcq-option.correct  { border-color:var(--success); background:var(--success-bg); }
.mcq-option.wrong    { border-color:var(--error); background:var(--error-bg); }

.option-letter {
  width:32px; height:32px; border-radius:50%; flex-shrink:0;
  border:2px solid var(--border); display:flex; align-items:center; justify-content:center;
  font-size:13px; font-weight:800; color:var(--text-muted);
  transition:all 0.2s; background:#fff;
}
.mcq-option:hover .option-letter { border-color:var(--accent); color:var(--accent); }
.mcq-option.selected .option-letter { border-color:var(--accent); background:var(--accent); color:white; }
.option-text { font-size:14px; color:var(--text-body); font-weight:500; line-height:1.5; }
.mcq-option.selected .option-text { color:var(--text-dark); font-weight:600; }

/* True/False */
.tf-options { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.tf-btn {
  padding:18px; border:2px solid var(--border); background:var(--bg-card);
  border-radius:12px; cursor:pointer; font-size:16px; font-weight:700;
  color:var(--text-body); transition:all 0.25s; text-align:center;
  display:flex; align-items:center; justify-content:center; gap:10px;
}
.tf-btn:hover { border-color:var(--accent); background:#fff5f5; color:var(--text-dark); }
.tf-btn.selected { border-color:var(--accent); background:#fff5f5; box-shadow:0 2px 8px var(--accent-glow); color:var(--accent-dark); }
.tf-btn.tf-true:hover  { border-color:var(--success); background:var(--success-bg); color:var(--success); }
.tf-btn.tf-false:hover { border-color:var(--error); background:var(--error-bg); color:var(--error); }
.tf-btn.tf-true.selected  { border-color:var(--success); background:var(--success-bg); color:var(--success); }
.tf-btn.tf-false.selected { border-color:var(--error); background:var(--error-bg); color:var(--error); }

/* Written answer */
.text-answer {
  width:100%; min-height:130px; padding:16px;
  background:var(--bg-card); border:1.5px solid var(--border);
  border-radius:12px; color:var(--text-dark); font-size:14px;
  resize:vertical; outline:none; transition:all 0.25s;
  font-family:inherit; line-height:1.7;
}
.text-answer:focus { border-color:var(--accent); background:#fff; box-shadow:0 0 0 3px var(--accent-glow); }
.text-answer::placeholder { color:var(--text-dim); }

/* Fill blank */
.fill-input {
  width:100%; padding:14px 18px;
  background:var(--bg-card); border:1.5px solid var(--border);
  border-radius:12px; color:var(--text-dark); font-size:15px;
  outline:none; transition:all 0.25s; font-family:inherit;
}
.fill-input:focus { border-color:var(--accent); background:#fff; box-shadow:0 0 0 3px var(--accent-glow); }

.quiz-controls { display:flex; gap:12px; margin-top:28px; justify-content:flex-end; align-items:center; }

.btn-submit {
  padding:13px 32px;
  background:linear-gradient(135deg, var(--accent), var(--accent-dark));
  border:none; border-radius:12px; color:white;
  font-size:15px; font-weight:700; cursor:pointer; transition:all 0.25s;
  display:flex; align-items:center; gap:9px;
  box-shadow:0 4px 14px var(--accent-glow);
}
.btn-submit:hover { transform:translateY(-2px); box-shadow:0 8px 24px var(--accent-glow); }
.btn-submit:disabled { opacity:0.5; cursor:not-allowed; transform:none; }

/* ══════════════════════════════
   AI GRADING SCREEN
══════════════════════════════ */
.ai-grading {
  display:flex; flex-direction:column; align-items:center;
  padding:80px 30px; text-align:center; gap:22px;
}
.ai-pulse {
  width:90px; height:90px; border-radius:50%;
  background:var(--accent-light);
  display:flex; align-items:center; justify-content:center;
  animation:pulse-ring 2s infinite;
}
@keyframes pulse-ring {
  0%   { box-shadow:0 0 0 0 var(--accent-glow); }
  70%  { box-shadow:0 0 0 22px transparent; }
  100% { box-shadow:0 0 0 0 transparent; }
}
.ai-pulse i { font-size:40px; color:var(--accent); }
.ai-grading-title { font-size:22px; font-weight:800; color:var(--text-dark); }
.ai-grading-sub   { font-size:14px; color:var(--text-muted); max-width:380px; line-height:1.7; }

/* ══════════════════════════════
   RESULTS SCREEN
══════════════════════════════ */
.results-screen { padding:32px 40px; max-width:900px; animation:fadeInUp 0.5s ease; }

.score-hero {
  text-align:center; padding:44px 40px;
  background:linear-gradient(135deg, #fff5f5 0%, #fff 60%);
  border:2px solid var(--border); border-radius:22px; margin-bottom:28px;
  box-shadow:var(--shadow-md);
}
.score-ring-wrap { position:relative; width:160px; height:160px; margin:0 auto 24px; }
.score-ring-svg { transform:rotate(-90deg); }
.score-ring-bg   { fill:none; stroke:var(--bg-card); stroke-width:10; }
.score-ring-fill { fill:none; stroke-width:10; stroke-linecap:round; transition:stroke-dashoffset 1.2s ease; }
.score-ring-text {
  position:absolute; inset:0; display:flex; flex-direction:column;
  align-items:center; justify-content:center;
}
.score-number { font-size:40px; font-weight:900; color:var(--text-dark); line-height:1; }
.score-max    { font-size:14px; color:var(--text-muted); font-weight:600; }
.score-grade  {
  font-size:28px; font-weight:900; margin-bottom:10px; letter-spacing:-0.5px;
}
.score-grade.distinction { color:var(--gold); }
.score-grade.excellent   { color:var(--success); }
.score-grade.good        { color:var(--info); }
.score-grade.pass        { color:var(--warning); }
.score-grade.fail        { color:var(--error); }
.score-message { font-size:15px; color:var(--text-muted); line-height:1.7; max-width:500px; margin:0 auto; }

.feedback-card {
  background:#fff; border:1.5px solid var(--border);
  border-radius:16px; padding:24px; margin-bottom:16px;
  box-shadow:var(--shadow-sm);
}
.feedback-title {
  font-size:14px; font-weight:800; color:var(--primary);
  margin-bottom:14px; display:flex; align-items:center; gap:8px;
  padding-bottom:12px; border-bottom:1px solid var(--border-light);
}

.q-feedback {
  padding:13px 16px; background:var(--bg-card); border-radius:10px;
  margin-bottom:8px; border-left:4px solid;
}
.q-feedback.correct  { border-color:var(--success); }
.q-feedback.wrong    { border-color:var(--error); }
.q-feedback-header { font-size:12px; font-weight:800; margin-bottom:5px; }
.q-feedback.correct .q-feedback-header { color:var(--success); }
.q-feedback.wrong   .q-feedback-header { color:var(--error); }
.q-feedback-text { font-size:13px; color:var(--text-muted); line-height:1.6; }

.fail-notice {
  text-align:center; padding:18px 20px; margin-top:16px;
  background:var(--error-bg); border:1.5px solid rgba(220,38,38,0.2);
  border-radius:14px;
}
.fail-notice-title { font-size:15px; font-weight:800; color:var(--error); margin-bottom:6px; }
.fail-notice-text  { font-size:13px; color:var(--text-muted); }

.results-actions { display:flex; gap:14px; justify-content:center; margin-top:24px; flex-wrap:wrap; }

/* ══════════════════════════════
   CERTIFICATE
══════════════════════════════ */
.certificate-container { padding:32px; display:flex; justify-content:center; }

.certificate {
  background:#fff; color:#1a1a2e; border-radius:14px;
  padding:64px 70px; width:780px; max-width:100%;
  position:relative; overflow:hidden;
  box-shadow:0 24px 64px rgba(0,0,0,0.15);
}
.cert-outer-border {
  position:absolute; inset:14px;
  border:3px solid #4F5D65; border-radius:8px; pointer-events:none;
}
.cert-outer-border::before {
  content:''; position:absolute; inset:6px;
  border:1px solid rgba(255,123,123,0.4); border-radius:5px;
}
.cert-logo { text-align:center; margin-bottom:28px; }
.cert-logo-text { font-size:24px; font-weight:900; color:#4F5D65; letter-spacing:3px; }
.cert-logo-text .cert-accent { color:#FF7B7B; }
.cert-logo-sub  { font-size:10px; color:#aaa; letter-spacing:4px; text-transform:uppercase; margin-top:4px; }

.cert-divider { height:2px; background:linear-gradient(90deg,transparent,#FF7B7B,transparent); margin:22px 0; }

.cert-presents { font-size:12px; text-align:center; color:#888; letter-spacing:3px; text-transform:uppercase; margin-bottom:10px; }
.cert-name     { font-size:38px; font-weight:900; text-align:center; color:#4F5D65; margin-bottom:14px; font-style:italic; }
.cert-body     { font-size:14px; text-align:center; color:#555; line-height:1.9; margin-bottom:22px; }
.cert-grade    { font-size:22px; font-weight:800; text-align:center; margin-bottom:8px; }
.cert-score    { font-size:13px; text-align:center; color:#888; margin-bottom:28px; }

.cert-footer { display:flex; justify-content:space-between; align-items:flex-end; margin-top:32px; }
.cert-sig { text-align:center; flex:1; }
.cert-sig-cursive { font-size:30px; font-family:'Dancing Script',cursive; color:#4F5D65; margin-bottom:6px; }
.cert-sig-line { width:160px; height:2px; background:#4F5D65; margin:0 auto 8px; }
.cert-sig-name  { font-size:13px; font-weight:700; color:#4F5D65; }
.cert-sig-title { font-size:11px; color:#999; margin-top:3px; }

.cert-date-box { text-align:center; }
.cert-date-label { font-size:11px; color:#aaa; text-transform:uppercase; letter-spacing:1px; }
.cert-date-value { font-size:15px; font-weight:800; color:#4F5D65; margin-top:4px; }
.cert-issued-by  { font-size:11px; color:#bbb; margin-top:10px; line-height:1.5; }

/* ══════════════════════════════
   ADMIN PANEL
══════════════════════════════ */
.admin-panel { padding:32px 40px; max-width:960px; }
.admin-title    { font-size:24px; font-weight:800; color:var(--text-dark); margin-bottom:6px; }
.admin-subtitle { font-size:14px; color:var(--text-muted); margin-bottom:28px; }
.admin-stats    { display:grid; grid-template-columns:repeat(3,1fr); gap:16px; margin-bottom:28px; }

.user-table-wrap {
  background:#fff; border:1.5px solid var(--border);
  border-radius:16px; overflow:hidden; box-shadow:var(--shadow-sm);
}
.user-table { width:100%; border-collapse:collapse; }
.user-table th {
  background:var(--bg-card); padding:14px 18px;
  font-size:12px; font-weight:800; color:var(--primary);
  text-transform:uppercase; letter-spacing:0.5px; text-align:left;
}
.user-table td {
  padding:14px 18px; font-size:13px; color:var(--text-body);
  border-top:1px solid var(--border-light);
}
.user-table tr:hover td { background:var(--bg-card); }

.status-badge {
  display:inline-block; padding:3px 10px; border-radius:20px;
  font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:0.5px;
}
.status-badge.pending  { background:var(--warning-bg); color:var(--warning); }
.status-badge.approved { background:var(--success-bg); color:var(--success); }
.status-badge.rejected { background:var(--error-bg); color:var(--error); }

.action-btns { display:flex; gap:6px; }
.btn-approve {
  padding:5px 13px; background:var(--success-bg); color:var(--success);
  border:1px solid rgba(22,163,74,0.3); border-radius:8px;
  font-size:12px; font-weight:700; cursor:pointer; transition:all 0.2s;
}
.btn-approve:hover { background:var(--success); color:white; }
.btn-reject {
  padding:5px 13px; background:var(--error-bg); color:var(--error);
  border:1px solid rgba(220,38,38,0.3); border-radius:8px;
  font-size:12px; font-weight:700; cursor:pointer; transition:all 0.2s;
}
.btn-reject:hover { background:var(--error); color:white; }
.btn-delete {
  padding:5px 10px; background:transparent; color:var(--text-dim);
  border:1px solid var(--border); border-radius:8px;
  font-size:12px; cursor:pointer; transition:all 0.2s;
}
.btn-delete:hover { border-color:var(--error); color:var(--error); }

/* ══════════════════════════════
   LOADING & MISC
══════════════════════════════ */
.loading-screen {
  display:flex; align-items:center; justify-content:center;
  height:100vh; flex-direction:column; gap:18px;
  background:var(--bg-main);
}
.loading-spinner {
  width:52px; height:52px; border-radius:50%;
  border:3px solid var(--border);
  border-top-color:var(--accent);
  animation:spin 0.8s linear infinite;
}
@keyframes spin { to { transform:rotate(360deg); } }

/* ─── TOAST ─── */
.toast {
  position:fixed; bottom:28px; right:28px; z-index:9999;
  padding:14px 22px; border-radius:12px; font-size:14px; font-weight:700;
  animation:slideInRight 0.35s ease; max-width:320px;
  box-shadow:var(--shadow-lg);
}
.toast.success { background:#16a34a; color:white; }
.toast.error   { background:#dc2626; color:white; }
.toast.info    { background:#2563eb; color:white; }
@keyframes slideInRight {
  from { transform:translateX(100%); opacity:0; }
  to   { transform:translateX(0); opacity:1; }
}

/* ─── REWARD POPUP ─── */
.reward-popup {
  position:fixed; top:80px; right:24px; z-index:9999;
  background:#fff; border:1.5px solid var(--border);
  border-radius:18px; padding:22px 26px;
  display:flex; align-items:center; gap:16px;
  box-shadow:var(--shadow-lg), 0 0 0 2px var(--accent-glow);
  animation:slideInRight 0.4s ease, fadeOutRight 0.4s ease 3.6s forwards;
  max-width:340px;
}
@keyframes fadeOutRight {
  to { opacity:0; transform:translateX(110%); }
}
.reward-icon  { font-size:38px; }
.reward-title { font-size:15px; font-weight:800; color:var(--text-dark); }
.reward-msg   { font-size:13px; color:var(--text-muted); margin-top:2px; }

/* ─── FIREWORKS ─── */
.firework {
  position:fixed; pointer-events:none; z-index:9998;
  animation:explode 1s forwards;
}
@keyframes explode {
  0%   { transform:scale(0); opacity:1; }
  100% { transform:scale(3); opacity:0; }
}

/* ─── EMPTY STATE ─── */
.empty-state { text-align:center; padding:60px 30px; color:var(--text-muted); }
.empty-state i { font-size:48px; color:var(--text-dim); margin-bottom:16px; display:block; }

/* ══════════════════════════════
   MOBILE HAMBURGER BUTTON
══════════════════════════════ */
.btn-hamburger {
  display:none;
  width:40px; height:40px; border-radius:10px;
  background:transparent; border:1.5px solid var(--border);
  color:var(--primary); font-size:16px;
  cursor:pointer; transition:all 0.2s;
  align-items:center; justify-content:center; flex-shrink:0;
}
.btn-hamburger:hover { background:var(--accent-light); border-color:var(--accent); color:var(--accent); }

/* Sidebar overlay for mobile */
.sidebar-overlay {
  display:none;
  position:fixed; inset:0; z-index:199;
  background:rgba(0,0,0,0.4); backdrop-filter:blur(2px);
}
.sidebar-overlay.visible { display:block; }

/* ══════════════════════════════
   RESPONSIVE — Tablet (768px)
══════════════════════════════ */
@media (max-width:768px) {
  :root { --sidebar-w:280px; }

  /* Show hamburger */
  .btn-hamburger { display:flex; }

  /* Sidebar slides in from left as overlay */
  .sidebar {
    position:fixed; left:-320px; top:0; height:100vh;
    z-index:200; transition:left 0.3s ease;
    box-shadow:var(--shadow-lg);
  }
  .sidebar.open { left:0; }

  /* Grids collapse */
  .stats-grid          { grid-template-columns:1fr 1fr; }
  .concept-grid        { grid-template-columns:1fr; }
  .tf-options          { grid-template-columns:1fr; }
  .dash-module-grid    { grid-template-columns:1fr; }
  .admin-stats         { grid-template-columns:1fr 1fr; }

  /* Padding reduces */
  .dashboard,
  .module-view,
  .results-screen,
  .admin-panel         { padding:16px; }

  /* Certificate scales */
  .certificate         { padding:32px 20px; }
  .cert-footer         { flex-direction:column; align-items:center; gap:20px; }

  /* Module tabs wrap */
  .module-nav-tabs     { flex-wrap:wrap; gap:6px; }
  .module-tab          { flex:none; width:calc(50% - 3px); font-size:12px; padding:9px 10px; }

  /* Quiz controls stack */
  .quiz-controls       { flex-wrap:wrap; justify-content:center; }

  /* Header compact */
  .header-name, .header-role { display:none; }
  .header-logo-text    { font-size:14px; }

  /* Welcome hero tighter */
  .welcome-title       { font-size:20px; }
  .welcome-hero        { padding:20px; }

  /* Results screen */
  .score-hero          { padding:28px 20px; }
  .results-actions     { flex-direction:column; align-items:center; }
  .results-actions button { width:100%; max-width:320px; justify-content:center; }
}

/* ══════════════════════════════
   RESPONSIVE — Small Phone (480px)
══════════════════════════════ */
@media (max-width:480px) {
  :root { --sidebar-w:100vw; }

  /* Full-width sidebar on tiny screens */
  .sidebar.open { left:0; width:100vw; }

  /* Stats stack single column */
  .stats-grid       { grid-template-columns:1fr; }
  .admin-stats      { grid-template-columns:1fr; }

  /* Single column module tabs */
  .module-tab       { width:100%; }

  /* Auth card full width */
  .auth-card        { padding:32px 20px; border-radius:16px; }
  .logo-title       { font-size:22px; }

  /* Buttons full width */
  .btn-primary      { font-size:14px; padding:13px; }
  .btn-submit       { padding:11px 20px; font-size:14px; }

  /* Score ring scales down */
  .score-ring-wrap  { width:130px; height:130px; }
  .score-ring-svg   { width:130px; height:130px; }
  .score-number     { font-size:32px; }
  .score-grade      { font-size:22px; }

  /* Certificate tiny */
  .certificate      { padding:24px 16px; }
  .cert-name        { font-size:26px; }
  .cert-logo-text   { font-size:18px; letter-spacing:1px; }

  /* Content cards */
  .content-card     { padding:18px; }
  .question-card    { padding:20px; }
}

/* ══════════════════════════════
   PRINT STYLES
══════════════════════════════ */
@media print {
  body { background:white !important; overflow:visible !important; }
  html { overflow:visible !important; }
  #main-app { height:auto !important; overflow:visible !important; }
  .app-body { overflow:visible !important; }
  .main-content { overflow:visible !important; }
  .sidebar, .top-header, .module-nav-tabs, .results-actions,
  .certificate-container > div > div:first-child { display:none !important; }
  .certificate { box-shadow:none !important; page-break-inside:avoid; }
  .certificate-container { padding:0 !important; }
}

/* =========================================
   LANGUAGE SELECTOR
   ========================================= */
.lang-selector {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.lang-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-body);
  transition: all 0.2s;
  white-space: nowrap;
}
.lang-btn:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  color: var(--accent);
}
.lang-flag { font-size: 16px; line-height:1; }
.lang-name { font-size: 12px; font-weight:600; }
.lang-chevron {
  font-size: 10px;
  transition: transform 0.2s;
  color: var(--text-muted);
}
.lang-dropdown.open ~ .lang-btn .lang-chevron,
.lang-selector[aria-expanded="true"] .lang-chevron {
  transform: rotate(180deg);
}

.lang-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 180px;
  background: var(--bg-panel);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  z-index: 9999;
  overflow: hidden;
  animation: fadeInDown 0.15s ease;
}
.lang-dropdown.open { display: block; }

@keyframes fadeInDown {
  from { opacity:0; transform:translateY(-6px); }
  to   { opacity:1; transform:translateY(0); }
}

.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-body);
  transition: background 0.15s;
}
.lang-option:hover { background: var(--bg-hover); }
.lang-option.active {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 700;
}
.lang-option .lang-label { flex:1; }

/* Auth page lang selector — centered above card */
.lang-selector.auth-lang {
  position: absolute;
  top: 18px;
  right: 18px;
  z-index: 10;
}
.lang-selector.auth-lang .lang-dropdown {
  right: 0;
  top: calc(100% + 4px);
}

/* Translating spinner overlay */
.translating-overlay {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(79,93,101,0.92);
  color: #fff;
  padding: 10px 22px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 9999;
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
  animation: fadeInUp 0.2s ease;
}
@keyframes fadeInUp {
  from { opacity:0; transform:translateX(-50%) translateY(8px); }
  to   { opacity:1; transform:translateX(-50%) translateY(0); }
}

/* Translated badge */
.translated-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 8px;
  margin-bottom: 10px;
}

@media (max-width: 768px) {
  .lang-name { display: none; }
  .lang-btn  { padding: 7px 9px; gap: 4px; }
}

/* ═══════════════════════════════════════════════════
   ENHANCED ADMIN DASHBOARD
═══════════════════════════════════════════════════ */

/* Header row */
.admin-header-row {
  display: flex; align-items: flex-start; justify-content: space-between;
  flex-wrap: wrap; gap: 12px; margin-bottom: 24px;
}
.admin-toolbar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-bottom: 16px;
}
.admin-search-wrap {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: 10px; padding: 8px 14px; flex: 1; min-width: 200px;
}
.admin-search-input {
  border: none; background: transparent; outline: none; width: 100%;
  font-size: 14px; color: var(--text-dark);
}
.admin-filter-select {
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: 10px; padding: 9px 14px; font-size: 14px;
  color: var(--text-dark); cursor: pointer; outline: none;
}

/* Stats cards with colour variants */
.stat-card { position: relative; overflow: hidden; }
.stat-icon {
  font-size: 28px; margin-bottom: 8px; opacity: .75;
}
.stat-card.stat-pending  .stat-icon { color: var(--warning); }
.stat-card.stat-active   .stat-icon { color: var(--success); }
.stat-card.stat-cert     .stat-icon { color: var(--gold); }
.stat-card.stat-attempts .stat-icon { color: var(--accent); }
.stat-card.stat-pending  .stat-value { color: var(--warning); }
.stat-card.stat-active   .stat-value { color: var(--success); }
.stat-card.stat-cert     .stat-value { color: var(--gold); }
.stat-card.stat-attempts .stat-value { color: var(--accent); }

/* Student table enhancements */
.student-cell { display: flex; align-items: center; gap: 12px; }
.student-avatar {
  width: 38px; height: 38px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff; font-weight: 700; font-size: 16px;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.student-name  { font-weight: 600; color: var(--text-dark); font-size: 14px; }
.student-email { font-size: 12px; color: var(--text-muted); }

/* Progress mini bar */
.progress-mini-wrap { display: flex; align-items: center; gap: 8px; }
.progress-mini-bar {
  flex: 1; height: 7px; background: var(--bg-inner, #f0f0f0);
  border-radius: 4px; overflow: hidden; min-width: 60px;
}
.progress-mini-fill {
  height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-dark));
  border-radius: 4px; transition: width .5s ease;
}
.progress-mini-label { font-size: 12px; font-weight: 600; color: var(--text-muted); white-space: nowrap; }

/* Score chips */
.score-chip {
  display: inline-block; font-size: 12px; font-weight: 700;
  padding: 3px 9px; border-radius: 20px;
}
.score-none       { background: var(--bg-card); color: var(--text-dim); }
.score-distinction{ background: #e8f5e9; color: #2e7d32; }
.score-excellent  { background: #e3f2fd; color: #1565c0; }
.score-good       { background: #fff8e1; color: #e65100; }
.score-pass       { background: #f3e5f5; color: #6a1b9a; }
.score-fail       { background: #fce4ec; color: #c62828; }

/* Certificate chip in table */
.cert-chip {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; font-weight: 700; padding: 2px 8px;
  background: linear-gradient(135deg,#fff8e1,#fff3cd);
  color: #b8860b; border-radius: 20px; margin-top: 4px;
}

/* Action buttons */
.btn-view {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 5px 11px; background: var(--accent); color: #fff;
  border: none; border-radius: 8px; cursor: pointer; font-size: 12px;
  font-weight: 600; transition: background .2s;
}
.btn-view:hover { background: var(--accent-dark); }

.empty-row {
  text-align: center; color: var(--text-dim); padding: 50px 20px;
  font-size: 14px; line-height: 2;
}

/* Text align helper */
.text-center { text-align: center; }

/* ── Student Detail Page ── */
.student-profile-card {
  display: flex; align-items: flex-start; gap: 20px; flex-wrap: wrap;
  background: var(--bg-card); border: 1.5px solid var(--border);
  border-radius: 16px; padding: 24px; margin-bottom: 24px;
}
.student-profile-avatar {
  width: 72px; height: 72px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff; font-size: 32px; font-weight: 800;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.student-profile-info { flex: 1; min-width: 200px; }
.student-profile-name { font-size: 22px; font-weight: 800; color: var(--text-dark); margin-bottom: 4px; }
.student-profile-email { font-size: 14px; color: var(--text-muted); margin-bottom: 10px; }
.student-profile-meta { display: flex; flex-wrap: wrap; gap: 12px; font-size: 12px; color: var(--text-muted); }
.student-profile-meta span { display: flex; align-items: center; gap: 5px; }

.student-profile-stats {
  display: flex; gap: 20px; flex-shrink: 0;
}
.profile-stat { text-align: center; }
.profile-stat-val { font-size: 24px; font-weight: 800; color: var(--text-dark); }
.profile-stat-lbl { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .5px; }

/* Certificate banner */
.cert-banner {
  display: flex; align-items: center; gap: 20px;
  background: linear-gradient(135deg,#fff9c4,#fff3cd);
  border: 2px solid #f0c040; border-radius: 16px; padding: 20px 24px;
  margin-bottom: 24px;
}
.cert-banner-icon { font-size: 48px; color: #b8860b; }
.cert-banner-title { font-size: 18px; font-weight: 800; color: #7a5800; margin-bottom: 4px; }
.cert-banner-detail { font-size: 14px; color: #5a4000; margin-bottom: 4px; }
.cert-banner-date { font-size: 12px; color: #7a6000; }

/* Detail sections */
.detail-section { margin-bottom: 32px; }
.detail-section-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 16px; font-weight: 700; color: var(--text-dark);
  margin-bottom: 14px; padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
}
.attempts-count {
  background: var(--accent); color: #fff; font-size: 12px;
  padding: 2px 8px; border-radius: 12px; font-weight: 700;
}
.module-detail-table .mod-num { width: 36px; text-align: center; font-weight: 700; color: var(--text-muted); font-size: 13px; }
.module-detail-table .mod-name { font-size: 13px; font-weight: 600; color: var(--text-dark); }

/* Quiz attempt cards */
.attempts-list { display: flex; flex-direction: column; gap: 12px; }
.attempt-card {
  border-radius: 12px; padding: 16px 20px;
  border-left: 4px solid transparent;
}
.attempt-pass { background: #f0fdf4; border-left-color: var(--success); }
.attempt-fail { background: #fef2f2; border-left-color: #f87171; }
.attempt-header {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 8px; margin-bottom: 6px;
}
.attempt-module { font-weight: 700; color: var(--text-dark); font-size: 14px; }
.attempt-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.grade-label { font-size: 13px; font-weight: 700; color: var(--text-muted); }
.attempt-num { font-size: 12px; color: var(--text-dim); background: var(--bg-card); padding: 2px 8px; border-radius: 10px; }
.attempt-date { font-size: 12px; color: var(--text-dim); margin-bottom: 6px; }
.attempt-feedback { font-size: 13px; color: var(--text-muted); font-style: italic; line-height: 1.5; }
.empty-attempts { text-align: center; padding: 40px; }

/* Status badge: not_started */
.status-badge.not_started { background: #f3f4f6; color: #6b7280; }

/* Mobile tweaks */
@media (max-width: 768px) {
  .student-profile-card { flex-direction: column; }
  .student-profile-stats { width: 100%; justify-content: space-around; }
  .admin-header-row { flex-direction: column; }
  .profile-stat-val { font-size: 20px; }
  .cert-banner { flex-direction: column; text-align: center; }
  .attempt-header { flex-direction: column; align-items: flex-start; }
}