/* ============================================================
   QUIZ QUIRINALE — Design System
   ============================================================ */

:root {
  --bg-primary:   #0a0a1a;
  --bg-secondary: #10102a;
  --bg-card:      rgba(255,255,255,0.04);
  --bg-card-hover:rgba(255,255,255,0.07);
  --bg-card-border:rgba(255,255,255,0.08);

  --text-primary:  #f0f0f5;
  --text-secondary:#a0a0c0;
  --text-muted:    #6b6b8d;

  --accent-start: #7c3aed;
  --accent-end:   #3b82f6;
  --accent-glow:  rgba(124,58,237,0.3);

  --success: #10b981;
  --success-bg: rgba(16,185,129,0.12);
  --error:   #ef4444;
  --error-bg: rgba(239,68,68,0.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245,158,11,0.12);

  --sidebar-w: 220px;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --transition-fast:   150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow:   400ms ease;

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;

  --shadow-card: 0 4px 24px rgba(0,0,0,0.3);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin:0; padding:0; }
html { font-size:16px; scroll-behavior:smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content:'';
  position:fixed; inset:0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(124,58,237,.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(59,130,246,.06) 0%, transparent 50%);
  pointer-events:none; z-index:0;
}

/* ---- Screen ---- */
.screen { display:none; position:relative; z-index:1; }
.screen.active { display:block; animation: fadeIn .35s ease; }
@keyframes fadeIn { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }

/* ---- Glass Card ---- */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 24px;
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
}
.card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-primary);
}

/* ---- Gradient text ---- */
.gradient-text {
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   LOGIN
   ============================================================ */
#screen-login { min-height:100vh; }
.login-wrap { min-height:100vh; display:flex; align-items:center; justify-content:center; padding:20px; }
.login-card { width:100%; max-width:400px; text-align:center; }
.login-logo { width:56px; height:56px; margin:0 auto 20px; }
.login-logo svg { width:100%; height:100%; }
.login-title { font-family:var(--font-display); font-size:2rem; font-weight:700; margin-bottom:8px; }
.login-sub { color:var(--text-secondary); font-size:.95rem; margin-bottom:24px; }
.login-field { margin-bottom:16px; }
.text-input {
  width:100%; padding:14px 16px;
  background:rgba(255,255,255,.05);
  border:1px solid var(--bg-card-border);
  border-radius:var(--radius-md);
  color:var(--text-primary);
  font-family:var(--font-body); font-size:.95rem;
  transition:border-color var(--transition-fast);
}
.text-input:focus { outline:none; border-color:var(--accent-start); }
.error-msg { color:var(--error); font-size:.85rem; margin-top:10px; }

/* ============================================================
   APP SHELL
   ============================================================ */
#app-shell { display:flex; min-height:100vh; }

/* ---- Sidebar ---- */
#sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  position: fixed; top:0; left:0; height:100vh;
  display: flex; flex-direction:column;
  background: rgba(10,10,26,.95);
  border-right: 1px solid var(--bg-card-border);
  backdrop-filter: blur(20px);
  z-index: 50;
  padding: 20px 0;
}
.sidebar-brand {
  display:flex; align-items:center; gap:10px;
  padding:0 20px 24px;
  border-bottom:1px solid var(--bg-card-border);
  font-family:var(--font-display); font-weight:600; font-size:.95rem;
}
.sidebar-brand svg { flex-shrink:0; }
.sidebar-nav { flex:1; padding:16px 10px; display:flex; flex-direction:column; gap:4px; }
.nav-link {
  display:flex; align-items:center; gap:10px;
  padding:10px 14px;
  border-radius:var(--radius-md);
  color:var(--text-secondary);
  font-size:.9rem; font-weight:500;
  cursor:pointer; text-decoration:none;
  transition:all var(--transition-fast);
}
.nav-link svg { width:18px; height:18px; flex-shrink:0; }
.nav-link:hover { background:var(--bg-card-hover); color:var(--text-primary); }
.nav-link.active { background:rgba(124,58,237,.15); color:var(--text-primary); }
.nav-link.active svg { color:var(--accent-start); }
.sidebar-logout {
  display:flex; align-items:center; gap:10px;
  margin:0 10px;
  padding:10px 14px;
  border-radius:var(--radius-md);
  border:none;
  background:none;
  color:var(--text-muted);
  font-size:.9rem; font-weight:500; cursor:pointer;
  transition:all var(--transition-fast);
}
.sidebar-logout:hover { background:var(--error-bg); color:var(--error); }
.sidebar-logout svg { width:18px; height:18px; }

/* ---- Main content ---- */
#main-content { flex:1; margin-left:var(--sidebar-w); min-height:100vh; position:relative; }
.page-container { max-width:900px; margin:0 auto; padding:32px 24px 60px; }
.page-header { margin-bottom:24px; }
.page-header h1 { font-family:var(--font-display); font-size:1.8rem; font-weight:700; margin-bottom:4px; }
.page-sub { color:var(--text-secondary); font-size:.9rem; }

/* Inner loading */
.inner-loading {
  position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
  background:var(--bg-primary); z-index:10;
}

/* ============================================================
   DASHBOARD
   ============================================================ */
.kpi-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:12px; margin-bottom:20px; }
.kpi-card {
  background:var(--bg-card); border:1px solid var(--bg-card-border);
  border-radius:var(--radius-md); padding:16px;
}
.kpi-val { font-family:var(--font-display); font-size:1.6rem; font-weight:700; margin-bottom:2px; }
.kpi-label { font-size:.78rem; color:var(--text-muted); text-transform:uppercase; letter-spacing:.04em; }

.two-col { display:grid; grid-template-columns:1fr 1fr; gap:20px; margin-bottom:20px; }
.two-col .glass-card { margin-bottom:0; }

.progress-overview { text-align:center; }
.big-ring-wrap { position:relative; width:120px; height:120px; margin:0 auto 12px; }
.big-ring { width:100%; height:100%; transform:rotate(-90deg); }
.ring-bg { fill:none; stroke:rgba(255,255,255,.06); stroke-width:9; }
.ring-fill {
  fill:none;
  stroke:url(#ringGrad);
  stroke-width:9; stroke-linecap:round;
  transition:stroke-dashoffset 1.2s ease;
}
.big-ring-label {
  position:absolute; inset:0;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  font-family:var(--font-display); font-weight:700;
}
.big-ring-label span:first-child { font-size:1.4rem; }
.big-ring-label span:last-child  { font-size:.75rem; color:var(--text-muted); }
.ring-sub { font-size:.85rem; color:var(--text-secondary); }

/* Quick actions */
.quick-actions-list { display:flex; flex-direction:column; gap:8px; }
.action-btn {
  display:flex; align-items:center; gap:10px;
  padding:12px 14px;
  background:rgba(255,255,255,.03);
  border:1px solid var(--bg-card-border);
  border-radius:var(--radius-md);
  color:var(--text-secondary);
  font-size:.9rem; font-weight:500; cursor:pointer;
  transition:all var(--transition-fast);
  text-align:left;
}
.action-btn svg { width:18px; height:18px; flex-shrink:0; }
.action-btn span:nth-child(2) { flex:1; }
.action-btn:hover { background:var(--bg-card-hover); color:var(--text-primary); border-color:rgba(255,255,255,.15); }
.action-btn--primary {
  background:linear-gradient(135deg,var(--accent-start),var(--accent-end));
  border-color:transparent; color:white;
  box-shadow:0 4px 14px var(--accent-glow);
}
.action-btn--primary:hover { opacity:.9; transform:translateY(-1px); }
.action-badge {
  background:rgba(255,255,255,.1); padding:2px 8px;
  border-radius:999px; font-size:.78rem; font-weight:600;
}

/* Category progress list */
.category-progress-list { display:flex; flex-direction:column; gap:12px; }
.cat-prog-item {}
.cat-prog-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:6px; }
.cat-prog-name { font-size:.88rem; font-weight:500; color:var(--text-secondary); }
.cat-prog-score { font-family:var(--font-display); font-size:.85rem; font-weight:600; color:var(--text-primary); }
.cat-prog-track { height:6px; background:rgba(255,255,255,.06); border-radius:3px; overflow:hidden; position:relative; }
.cat-prog-fill { height:100%; border-radius:3px; transition:width 1s ease; }
.cat-prog-fill.good { background:linear-gradient(90deg,var(--success),#34d399); }
.cat-prog-fill.med  { background:linear-gradient(90deg,var(--warning),#fbbf24); }
.cat-prog-fill.bad  { background:linear-gradient(90deg,var(--error),#f87171); }
.cat-prog-fill.none { background:rgba(255,255,255,.1); }
.cat-prog-meta { display:flex; gap:12px; margin-top:4px; font-size:.75rem; color:var(--text-muted); }
.cat-wrong-badge { color:var(--error); }

/* Recent sessions mini list */
.session-mini { display:flex; justify-content:space-between; align-items:center; padding:10px 0; border-bottom:1px solid var(--bg-card-border); font-size:.88rem; }
.session-mini:last-child { border-bottom:none; padding-bottom:0; }
.session-mini-left { display:flex; flex-direction:column; gap:2px; }
.session-mini-date { color:var(--text-muted); font-size:.78rem; }
.session-mini-right { display:flex; align-items:center; gap:8px; }
.session-score { font-family:var(--font-display); font-weight:600; }
.session-pct { padding:2px 8px; border-radius:999px; font-size:.78rem; font-weight:600; }
.pct-good { background:var(--success-bg); color:var(--success); }
.pct-med  { background:var(--warning-bg); color:var(--warning); }
.pct-bad  { background:var(--error-bg); color:var(--error); }

/* ============================================================
   CONFIG
   ============================================================ */
.mode-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(160px,1fr)); gap:10px; }
.mode-card { cursor:pointer; }
.mode-card input { display:none; }
.mode-inner {
  display:flex; flex-direction:column; align-items:center; gap:6px;
  padding:16px 12px; border:1.5px solid var(--bg-card-border);
  border-radius:var(--radius-md); background:var(--bg-card);
  transition:all var(--transition-fast); text-align:center;
}
.mode-card input:checked + .mode-inner {
  border-color:var(--accent-start);
  background:rgba(124,58,237,.1);
  box-shadow:0 0 16px rgba(124,58,237,.12);
}
.mode-card:hover .mode-inner { background:var(--bg-card-hover); }
.mode-icon  { font-size:1.4rem; }
.mode-name  { font-size:.85rem; font-weight:500; color:var(--text-secondary); }
.mode-count { font-size:.78rem; color:var(--accent-end); font-weight:600; }
.mode-card--custom { grid-column:1/-1; }
.mode-card--custom .mode-inner { flex-direction:row; justify-content:center; }

/* custom categories */
.cat-config-item {
  display:flex; align-items:center; gap:12px;
  padding:12px; margin-bottom:8px;
  border:1px solid var(--bg-card-border);
  border-radius:var(--radius-md);
}
.cat-config-name { flex:1; font-size:.9rem; font-weight:500; }
.cat-config-available { font-size:.8rem; color:var(--text-muted); min-width:80px; text-align:right; }
.cat-config-number { width:60px; padding:6px; text-align:center; background:rgba(0,0,0,.2); border:1px solid var(--bg-card-border); border-radius:6px; color:white; font-size:.9rem; }

/* Chip buttons (timer mode) */
.chip-btn { cursor:pointer; }
.chip-btn input { display:none; }
.chip-btn span {
  display:inline-block; padding:8px 16px;
  border:1.5px solid var(--bg-card-border);
  border-radius:var(--radius-sm);
  background:var(--bg-card);
  color:var(--text-secondary);
  font-size:.85rem; font-weight:500;
  transition:all var(--transition-fast);
}
.chip-btn input:checked + span {
  border-color:var(--accent-start);
  background:rgba(124,58,237,.12);
  color:var(--text-primary);
}
.chip-btn:hover span { background:var(--bg-card-hover); color:var(--text-primary); }

/* Toggle row */
.toggle-row { display:flex; justify-content:space-between; align-items:center; gap:16px; }

/* ============================================================
   QUIZ
   ============================================================ */
.quiz-shell { min-height:100vh; display:flex; flex-direction:column; }
.quiz-topbar {
  display:flex; align-items:center; justify-content:space-between;
  padding:12px 16px; background:rgba(10,10,26,.8);
  border-bottom:1px solid var(--bg-card-border);
  backdrop-filter:blur(10px); position:sticky; top:0; z-index:10;
}
.quiz-progress-info { font-family:var(--font-display); font-size:1rem; font-weight:600; color:var(--text-secondary); }
.quiz-progress-info #quiz-current { color:var(--text-primary); font-size:1.2rem; }
.progress-separator { margin:0 4px; color:var(--text-muted); }
.quiz-timer {
  display:flex; align-items:center; gap:6px;
  font-family:var(--font-display); font-size:1rem; font-weight:600; color:var(--text-secondary);
  padding:6px 12px; border-radius:var(--radius-sm);
  background:var(--bg-card); border:1px solid var(--bg-card-border);
}
.quiz-timer.warning { color:var(--warning); border-color:rgba(245,158,11,.3); background:var(--warning-bg); }
.quiz-timer.danger  { color:var(--error);   border-color:rgba(239,68,68,.3);  background:var(--error-bg);  animation:pulse 1s ease infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.7} }

.progress-bar-track { width:100%; height:4px; background:rgba(255,255,255,.06); overflow:hidden; }
.progress-bar-fill { height:100%; background:linear-gradient(90deg,var(--accent-start),var(--accent-end)); transition:width .3s ease; }

.quiz-body { flex:1; padding:16px; max-width:760px; margin:0 auto; width:100%; }
.question-card { margin-bottom:16px; animation:slideQ .25s ease; }
@keyframes slideQ { from{opacity:0;transform:translateX(16px)} to{opacity:1;transform:translateX(0)} }

.category-badge {
  display:inline-block; padding:3px 10px; border-radius:999px;
  background:rgba(124,58,237,.15); color:var(--accent-start);
  font-size:.72rem; font-weight:600; text-transform:uppercase; letter-spacing:.05em;
}
.seen-badge {
  display:inline-block; padding:3px 10px; border-radius:999px;
  font-size:.72rem; font-weight:600;
}
.seen-badge.was-wrong { background:var(--error-bg); color:var(--error); }
.seen-badge.was-correct { background:var(--success-bg); color:var(--success); }

.question-text {
  font-family:var(--font-display); font-size:1.15rem; font-weight:600;
  line-height:1.5; margin-bottom:20px; color:var(--text-primary);
}
.options-list { display:flex; flex-direction:column; gap:10px; }
.option-btn {
  display:flex; align-items:flex-start; gap:14px; width:100%;
  padding:14px 16px; border:1.5px solid var(--bg-card-border);
  border-radius:var(--radius-md); background:rgba(255,255,255,.02);
  color:var(--text-primary); font-family:var(--font-body); font-size:.93rem;
  line-height:1.5; text-align:left; cursor:pointer;
  transition:all var(--transition-fast);
}
.option-btn:hover:not(.disabled) { background:var(--bg-card-hover); border-color:rgba(255,255,255,.15); }
.option-letter {
  display:flex; align-items:center; justify-content:center;
  min-width:26px; height:26px; border-radius:7px;
  background:rgba(255,255,255,.06); font-family:var(--font-display);
  font-weight:600; font-size:.82rem; color:var(--text-secondary); flex-shrink:0;
  transition:all var(--transition-fast);
}
.option-btn:hover:not(.disabled) .option-letter { background:rgba(124,58,237,.15); color:var(--accent-start); }
.option-btn.selected { border-color:var(--accent-start); background:rgba(124,58,237,.08); }
.option-btn.selected .option-letter { background:linear-gradient(135deg,var(--accent-start),var(--accent-end)); color:white; }
.option-btn.correct { border-color:var(--success); background:var(--success-bg); }
.option-btn.correct .option-letter { background:var(--success); color:white; }
.option-btn.wrong   { border-color:var(--error);   background:var(--error-bg); }
.option-btn.wrong .option-letter   { background:var(--error);   color:white; }
.option-btn.disabled { cursor:default; opacity:.6; }
.option-btn.disabled.correct, .option-btn.disabled.wrong { opacity:1; }

.study-feedback {
  margin-top:14px; padding:14px; border-radius:var(--radius-md);
  animation:fadeIn .25s ease;
}
.study-feedback.correct-fb { background:var(--success-bg); border:1px solid rgba(16,185,129,.3); }
.study-feedback.wrong-fb   { background:var(--error-bg);   border:1px solid rgba(239,68,68,.3); }
.study-feedback p { font-size:.9rem; font-weight:600; }

.quiz-nav { display:flex; gap:12px; justify-content:space-between; padding-bottom:32px; }
.quiz-nav .btn-primary { flex:1; }

/* Fav button */
.btn-fav.starred svg { fill:#f59e0b; stroke:#f59e0b; }

/* ============================================================
   RESULTS
   ============================================================ */
.results-header { text-align:center; padding:24px 0 20px; }
.score-ring { position:relative; width:130px; height:130px; margin:0 auto 16px; }
.score-ring svg { width:100%; height:100%; transform:rotate(-90deg); }
.score-center { position:absolute; inset:0; display:flex; align-items:center; justify-content:center; }
.score-percent { font-family:var(--font-display); font-size:1.8rem; font-weight:700; }
.results-header h1 { font-family:var(--font-display); font-size:1.6rem; font-weight:700; margin-bottom:6px; }
.save-status { font-size:.85rem; color:var(--text-muted); }
.results-stats { display:grid; grid-template-columns:repeat(4,1fr); gap:4px; text-align:center; }
.stat-item { padding:14px 8px; }
.stat-value { display:block; font-family:var(--font-display); font-size:1.5rem; font-weight:700; color:var(--success); margin-bottom:4px; }
.stat-value.stat-wrong   { color:var(--error); }
.stat-value.stat-skipped { color:var(--warning); }
.stat-label { font-size:.75rem; color:var(--text-muted); text-transform:uppercase; letter-spacing:.04em; }
.results-actions { display:flex; gap:10px; flex-wrap:wrap; padding-bottom:40px; }
.results-actions .btn-primary, .results-actions .btn-secondary { flex:1; min-width:120px; }

/* ============================================================
   ARCHIVE
   ============================================================ */
.archive-filters { padding:16px 20px; }
.filter-row { display:flex; gap:10px; flex-wrap:wrap; }
.select-input {
  padding:10px 14px; background:rgba(255,255,255,.05);
  border:1px solid var(--bg-card-border); border-radius:var(--radius-md);
  color:var(--text-primary); font-family:var(--font-body); font-size:.88rem; cursor:pointer;
}
.select-input option { background:var(--bg-secondary); }
.archive-list { display:flex; flex-direction:column; gap:8px; margin-bottom:16px; }
.archive-item {
  background:var(--bg-card); border:1px solid var(--bg-card-border);
  border-radius:var(--radius-md); overflow:hidden;
  transition:border-color var(--transition-fast);
}
.archive-item:hover { border-color:rgba(255,255,255,.15); }
.archive-item-header {
  display:flex; align-items:center; gap:10px; padding:12px 16px; cursor:pointer;
}
.archive-status-dot { width:8px; height:8px; border-radius:50%; flex-shrink:0; }
.dot-unseen  { background:rgba(255,255,255,.2); }
.dot-correct { background:var(--success); }
.dot-wrong   { background:var(--error); }
.archive-item-q { flex:1; font-size:.88rem; font-weight:500; line-height:1.4;
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.archive-item-meta { display:flex; align-items:center; gap:8px; flex-shrink:0; }
.wrong-count { font-size:.75rem; color:var(--error); font-weight:600; }
.archive-item-detail {
  padding:0 16px; max-height:0; overflow:hidden;
  transition:max-height .3s ease, padding .3s ease;
  border-top:0 solid var(--bg-card-border);
}
.archive-item.expanded .archive-item-detail {
  max-height:400px; padding:12px 16px;
  border-top:1px solid var(--bg-card-border);
}
.archive-detail-opts { display:flex; flex-direction:column; gap:6px; margin-top:8px; }
.archive-opt { padding:8px 12px; border-radius:var(--radius-sm); font-size:.85rem; }
.archive-opt.correct-opt { background:var(--success-bg); color:var(--success); font-weight:600; }

/* Pagination */
.pagination { display:flex; gap:6px; justify-content:center; flex-wrap:wrap; padding-bottom:32px; }
.page-btn {
  min-width:36px; height:36px; padding:0 10px;
  border:1px solid var(--bg-card-border); border-radius:var(--radius-sm);
  background:var(--bg-card); color:var(--text-secondary);
  font-size:.85rem; font-weight:500; cursor:pointer;
  transition:all var(--transition-fast);
}
.page-btn:hover { background:var(--bg-card-hover); color:var(--text-primary); }
.page-btn.active { background:linear-gradient(135deg,var(--accent-start),var(--accent-end)); border-color:transparent; color:white; }

/* ============================================================
   SESSIONS
   ============================================================ */
.sessions-list { display:flex; flex-direction:column; gap:10px; }
.session-card {
  background:var(--bg-card); border:1px solid var(--bg-card-border);
  border-radius:var(--radius-lg); overflow:hidden;
}
.session-card-header {
  display:flex; align-items:center; gap:14px; padding:16px 20px; cursor:pointer;
  transition:background var(--transition-fast);
}
.session-card-header:hover { background:var(--bg-card-hover); }
.session-date-col { flex:1; }
.session-date { font-size:.95rem; font-weight:600; }
.session-meta { font-size:.8rem; color:var(--text-muted); }
.session-score-big { font-family:var(--font-display); font-size:1.2rem; font-weight:700; }
.session-detail {
  padding:0; max-height:0; overflow:hidden;
  transition:max-height .4s ease;
  border-top:0 solid var(--bg-card-border);
}
.session-card.expanded .session-detail {
  max-height:600px; overflow-y:auto;
  border-top:1px solid var(--bg-card-border);
}
.session-detail-inner { padding:16px 20px; }
.session-attempt-list { display:flex; flex-direction:column; gap:6px; }
.session-attempt {
  display:flex; align-items:flex-start; gap:10px; padding:8px 10px;
  border-radius:var(--radius-sm); font-size:.85rem;
}
.session-attempt.att-correct { background:var(--success-bg); }
.session-attempt.att-wrong   { background:var(--error-bg); }
.session-attempt.att-skip    { background:rgba(255,255,255,.03); }
.att-icon { font-size:.9rem; flex-shrink:0; margin-top:1px; }
.att-question { flex:1; line-height:1.4; }
.att-answer { font-size:.78rem; color:var(--text-muted); margin-top:3px; }

/* ============================================================
   STATS
   ============================================================ */
.daily-chart { overflow-x:auto; padding-bottom:8px; }
.daily-chart svg { min-width:400px; }
.stat-bar-item { margin-bottom:12px; }
.stat-bar-header { display:flex; justify-content:space-between; margin-bottom:5px; font-size:.85rem; }
.stat-bar-track { height:8px; background:rgba(255,255,255,.06); border-radius:4px; overflow:hidden; }
.stat-bar-fill { height:100%; border-radius:4px; transition:width 1s ease; }
.top-wrong-item { display:flex; align-items:flex-start; gap:12px; padding:10px 0; border-bottom:1px solid var(--bg-card-border); font-size:.88rem; }
.top-wrong-item:last-child { border-bottom:none; }
.top-wrong-num { min-width:28px; height:28px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-family:var(--font-display); font-weight:700; font-size:.85rem; flex-shrink:0; }
.top-wrong-q { flex:1; line-height:1.4; }
.top-wrong-count { color:var(--error); font-weight:700; font-family:var(--font-display); flex-shrink:0; }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  width:100%; padding:15px 24px; border:none; border-radius:var(--radius-md);
  background:linear-gradient(135deg,var(--accent-start),var(--accent-end));
  color:white; font-family:var(--font-display); font-size:1rem; font-weight:600;
  cursor:pointer; transition:all var(--transition-normal);
  box-shadow:0 4px 16px var(--accent-glow); position:relative; overflow:hidden;
}
.btn-primary:hover { transform:translateY(-1px); box-shadow:0 6px 24px rgba(124,58,237,.4); }
.btn-primary:active { transform:translateY(0); }
.btn-primary:disabled { opacity:.4; cursor:not-allowed; transform:none; box-shadow:none; }
.btn-secondary {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:13px 22px; border:1.5px solid var(--bg-card-border); border-radius:var(--radius-md);
  background:var(--bg-card); color:var(--text-secondary);
  font-family:var(--font-display); font-size:.93rem; font-weight:500; cursor:pointer;
  transition:all var(--transition-normal);
}
.btn-secondary:hover { background:var(--bg-card-hover); color:var(--text-primary); border-color:rgba(255,255,255,.15); }
.btn-secondary:disabled { opacity:.35; cursor:not-allowed; }
.btn-danger {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:13px 22px; border:1.5px solid var(--error); border-radius:var(--radius-md);
  background:var(--error-bg); color:var(--error);
  font-family:var(--font-display); font-size:.93rem; font-weight:600; cursor:pointer;
  transition:all var(--transition-normal);
}
.btn-danger:hover { background:rgba(239,68,68,.2); }
.btn-small { padding:7px 14px !important; font-size:.82rem !important; }
.btn-icon {
  display:flex; align-items:center; justify-content:center;
  width:36px; height:36px; border:1px solid var(--bg-card-border);
  border-radius:var(--radius-sm); background:var(--bg-card); color:var(--text-muted);
  cursor:pointer; transition:all var(--transition-fast);
}
.btn-icon:hover { color:var(--text-primary); background:var(--bg-card-hover); }
.btn-icon svg { width:16px; height:16px; }

/* ============================================================
   SLIDER
   ============================================================ */
input[type="range"] {
  -webkit-appearance:none; appearance:none; width:100%; height:6px;
  background:rgba(255,255,255,.08); border-radius:3px; outline:none; cursor:pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance:none; appearance:none; width:20px; height:20px;
  border-radius:50%; background:linear-gradient(135deg,var(--accent-start),var(--accent-end));
  cursor:pointer; box-shadow:0 0 10px var(--accent-glow); transition:transform var(--transition-fast);
}
input[type="range"]::-webkit-slider-thumb:hover { transform:scale(1.15); }
.slider-value-wrapper { text-align:center; margin-top:8px; }
.slider-value { font-family:var(--font-display); font-size:1.8rem; font-weight:700; background:linear-gradient(135deg,var(--accent-start),var(--accent-end)); -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text; }

/* ============================================================
   TOGGLE SWITCH
   ============================================================ */
.toggle-switch { position:relative; width:46px; height:26px; flex-shrink:0; }
.toggle-switch input { opacity:0; width:0; height:0; }
.toggle-slider {
  position:absolute; inset:0; background:rgba(255,255,255,.1);
  border-radius:999px; cursor:pointer; transition:var(--transition-normal);
}
.toggle-slider::before {
  content:''; position:absolute; height:20px; width:20px;
  left:3px; bottom:3px; background:var(--text-secondary);
  border-radius:50%; transition:var(--transition-normal);
}
.toggle-switch input:checked + .toggle-slider { background:linear-gradient(135deg,var(--accent-start),var(--accent-end)); }
.toggle-switch input:checked + .toggle-slider::before { transform:translateX(20px); background:white; }

/* ============================================================
   MODALS / SUMMARY
   ============================================================ */
.modal-overlay {
  position:fixed; inset:0; display:flex; align-items:center; justify-content:center;
  background:rgba(0,0,0,.65); backdrop-filter:blur(4px); z-index:100; padding:20px;
  animation:fadeIn .2s ease;
}
.modal { max-width:380px; width:100%; }
.modal h2 { font-family:var(--font-display); font-size:1.15rem; margin-bottom:8px; }
.modal-actions { display:flex; gap:10px; }
.modal-actions button { flex:1; }
.summary-legend { display:flex; gap:14px; font-size:.82rem; color:var(--text-muted); margin-bottom:12px; flex-wrap:wrap; }
.legend-item { display:flex; align-items:center; gap:5px; }
.box { width:11px; height:11px; border-radius:2px; }
.box-answered { background:rgba(59,130,246,.2); border:1px solid var(--accent-end); }
.box-current  { border:2px solid var(--accent-start); }
.box-empty    { background:rgba(255,255,255,.05); border:1px solid rgba(255,255,255,.1); }
.summary-grid {
  display:grid; grid-template-columns:repeat(auto-fill,minmax(38px,1fr)); gap:6px;
  max-height:360px; overflow-y:auto; padding-right:4px;
}
.summary-item {
  width:38px; height:38px; display:flex; align-items:center; justify-content:center;
  border-radius:6px; cursor:pointer; font-weight:600; font-size:.82rem;
  background:rgba(255,255,255,.05); border:1px solid rgba(255,255,255,.1);
  color:var(--text-secondary); transition:all .15s;
}
.summary-item:hover { transform:scale(1.1); }
.summary-item.answered { background:rgba(59,130,246,.2); border-color:var(--accent-end); color:white; }
.summary-item.current  { border:2px solid var(--accent-start); box-shadow:0 0 8px var(--accent-glow); }

/* ============================================================
   SPINNER / LOADING
   ============================================================ */
.spinner {
  width:36px; height:36px;
  border:3px solid rgba(255,255,255,.1);
  border-top-color:var(--accent-start);
  border-radius:50%; animation:spin .7s linear infinite;
}
@keyframes spin { to{transform:rotate(360deg)} }

/* ============================================================
   TOAST
   ============================================================ */
.toast {
  position:fixed; bottom:24px; left:50%; transform:translateX(-50%);
  padding:10px 20px; border-radius:var(--radius-md);
  background:rgba(30,30,50,.95); border:1px solid var(--bg-card-border);
  color:var(--text-primary); font-size:.88rem; font-weight:500;
  z-index:200; backdrop-filter:blur(10px); animation:fadeIn .2s ease;
}

/* ============================================================
   BOTTOM NAV (mobile)
   ============================================================ */
.bottom-nav {
  position:fixed; bottom:0; left:0; right:0;
  height:60px; background:rgba(10,10,26,.95);
  border-top:1px solid var(--bg-card-border);
  backdrop-filter:blur(20px); z-index:50;
  display:flex; align-items:stretch;
}
.bnav-link {
  flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center;
  gap:3px; color:var(--text-muted); font-size:.65rem; font-weight:500;
  cursor:pointer; text-decoration:none;
  transition:color var(--transition-fast);
}
.bnav-link svg { width:20px; height:20px; }
.bnav-link:hover, .bnav-link.active { color:var(--accent-start); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  #sidebar, .sidebar-brand { display:none !important; }
  #main-content { margin-left:0; }
  #bottom-nav { display:flex !important; }
  .page-container { padding:16px 14px 80px; }
  .kpi-grid { grid-template-columns:1fr 1fr; }
  .two-col { grid-template-columns:1fr; }
  .quiz-body { padding:12px; }
  .results-stats { grid-template-columns:repeat(2,1fr); gap:8px; }
  .results-actions { flex-direction:column; }
  .filter-row { flex-direction:column; }
  .filter-row .text-input, .filter-row .select-input { width:100%; }
}
@media (max-width: 480px) {
  .kpi-grid { grid-template-columns:1fr 1fr; }
  .page-header h1 { font-size:1.4rem; }
  .question-text { font-size:1rem; }
}
@media (min-width: 769px) {
  #bottom-nav { display:none !important; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration:.01ms !important; transition-duration:.01ms !important; }
}
:focus-visible { outline:2px solid var(--accent-start); outline-offset:2px; }
button:focus:not(:focus-visible) { outline:none; }