/* ============================================================
   style.css — Barcha stillar
   ============================================================ */

:root {
  --primary: #6a1b9a;
  --primary-light: #9c27b0;
  --primary-dark: #4a148c;
  --success: #2e7d32;
  --success-light: #66bb6a;
  --danger: #c62828;
  --danger-light: #ef5350;
  --warning: #f9a825;
  --info: #0277bd;
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1f2430;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
  --radius: 14px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

.hidden { display: none !important; }
.muted { color: var(--text-muted); }
.hide-sm { display: inline; }

/* ==================== HEADER ==================== */
.app-header {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary), var(--primary-light));
  color: #fff;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-emoji { font-size: 28px; }
.brand-text h1 { font-size: 18px; margin: 0; }
.brand-text small { color: rgba(255,255,255,0.85); font-size: 12px; }
.header-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.user-box {
  display: flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.15);
  padding: 6px 10px;
  border-radius: 30px;
}
.user-avatar {
  width: 28px; height: 28px; border-radius: 50%;
  background: rgba(255,255,255,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; overflow: hidden;
}
.user-avatar img { width: 100%; height: 100%; object-fit: cover; }
.user-name { font-size: 14px; font-weight: 500; max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ==================== BUTTONS ==================== */
.btn {
  border: none; cursor: pointer; font-family: inherit;
  padding: 10px 16px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600;
  transition: all .18s ease;
  display: inline-flex; align-items: center; gap: 6px;
  background: #eee; color: var(--text);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-light); }
.btn-warning { background: var(--warning); color: #333; }
.btn-info { background: var(--info); color: #fff; }
.btn-outline { background: transparent; border: 1.5px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-ghost { background: rgba(255,255,255,0.15); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,0.28); }
.btn-sm { padding: 7px 12px; font-size: 13px; }
.icon-btn {
  background: transparent; border: none; cursor: pointer;
  font-size: 18px; padding: 4px 8px; border-radius: 8px;
  transition: background .15s;
}
.icon-btn:hover { background: rgba(0,0,0,0.08); }

/* ==================== CONTAINER ==================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 16px 60px;
  animation: fadeIn .3s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==================== UPLOAD ZONE ==================== */
.upload-zone {
  background: var(--card);
  border: 2.5px dashed var(--primary-light);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  transition: all .2s;
  margin-bottom: 24px;
}
.upload-zone.drag-over {
  background: #f3e5f5;
  border-color: var(--primary);
  transform: scale(1.01);
}
.upload-icon { font-size: 52px; margin-bottom: 8px; }
.upload-zone h2 { margin: 6px 0; color: var(--primary-dark); }
.upload-zone p { color: var(--text-muted); margin-bottom: 16px; }

/* ==================== TOOLBAR ==================== */
.toolbar {
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; margin-bottom: 16px; flex-wrap: wrap;
}
.toolbar-left { display: flex; align-items: center; gap: 10px; }
.toolbar-left h2 { margin: 0; font-size: 20px; }
.toolbar-right { display: flex; align-items: center; gap: 10px; }
.sort-label { font-size: 14px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.badge {
  background: var(--primary); color: #fff;
  padding: 3px 10px; border-radius: 20px; font-size: 12px; font-weight: 600;
}

/* ==================== FILE GRID ==================== */
.file-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.file-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  transition: transform .18s, box-shadow .18s;
  display: flex; flex-direction: column; gap: 10px;
  animation: slideUp .3s ease;
}
.file-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.file-card-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; }
.file-card-title { margin: 0; font-size: 16px; word-break: break-word; flex: 1; }
.file-card-meta { display: flex; gap: 12px; flex-wrap: wrap; font-size: 13px; color: var(--text-muted); }
.meta-item { display: inline-flex; align-items: center; gap: 4px; }
.file-card-groups {
  font-size: 12px; color: var(--primary-dark);
  background: #f3e5f5; padding: 6px 10px; border-radius: 8px;
  word-break: break-word;
}
.file-card-scores { display: flex; flex-direction: column; gap: 4px; font-size: 13px; }
.score-item { color: var(--text-muted); }
.file-card-actions { display: flex; gap: 8px; margin-top: auto; padding-top: 8px; }
.file-card-actions .btn { flex: 1; justify-content: center; }

.empty-state {
  text-align: center; padding: 60px 20px; color: var(--text-muted);
}
.empty-emoji { font-size: 60px; margin-bottom: 10px; }
.empty-state h3 { color: var(--text); margin: 8px 0; }

/* ==================== PANEL ==================== */
.panel {
  background: var(--card);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}
.panel h3 { margin-top: 0; color: var(--primary-dark); }

/* ==================== MODAL ==================== */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(20,10,40,0.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 100; padding: 16px;
  animation: fadeIn .18s ease;
  overflow-y: auto;
}
.modal {
  background: #fff; border-radius: var(--radius);
  width: 100%; max-width: 600px;
  max-height: 94vh; overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: slideUp .25s ease;
}
.modal-head {
  display: flex; justify-content: space-between; align-items: flex-start;
  padding: 18px 20px; border-bottom: 1px solid var(--border);
  position: sticky; top: 0; background: #fff; z-index: 2;
  border-radius: var(--radius) var(--radius) 0 0;
}
.modal-head h2 { margin: 0 0 4px; font-size: 18px; color: var(--primary-dark); }
.modal-sub { margin: 0; font-size: 13px; color: var(--text-muted); }
.modal-groups { margin: 4px 0 0; font-size: 12px; color: var(--primary); }
.modal-close {
  background: transparent; border: none; font-size: 20px; cursor: pointer;
  color: var(--text-muted); padding: 2px 8px; border-radius: 8px;
}
.modal-close:hover { background: #f0f0f0; }
.modal-body { padding: 18px 20px; }
.modal-foot {
  display: flex; justify-content: flex-end; gap: 10px;
  padding: 14px 20px; border-top: 1px solid var(--border);
  position: sticky; bottom: 0; background: #fff;
  border-radius: 0 0 var(--radius) var(--radius);
}

.form-group { margin-bottom: 16px; }
.form-label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; color: var(--text); }
.form-hint { font-size: 12px; color: var(--text-muted); margin: 4px 0 0; }
.form-row { display: flex; gap: 12px; flex-wrap: wrap; }
.form-row .form-group { flex: 1; min-width: 140px; margin-bottom: 0; }

.input, select.input, input.input {
  width: 100%; padding: 10px 12px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  font-family: inherit; font-size: 14px; background: #fff; color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}
.input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(106,27,154,0.12); }
.input.error { border-color: var(--danger); box-shadow: 0 0 0 3px rgba(198,40,40,0.12); }

/* Segmented */
.segmented {
  display: flex; gap: 0; border-radius: var(--radius-sm);
  overflow: hidden; border: 1.5px solid var(--border);
}
.seg-btn {
  flex: 1; padding: 10px; border: none; background: #fff;
  cursor: pointer; font-family: inherit; font-size: 14px; font-weight: 600;
  color: var(--text-muted); transition: all .15s;
}
.seg-btn.active { background: var(--primary); color: #fff; }
.seg-btn:not(.active):hover { background: #f5f5f5; }

/* Range */
.range-group { background: #faf7fd; padding: 14px; border-radius: var(--radius-sm); border: 1px solid #ede0f5; }
.range-inputs { display: flex; gap: 12px; flex-wrap: wrap; }
.range-field { flex: 1; min-width: 140px; display: flex; flex-direction: column; gap: 4px; }
.range-field span { font-size: 13px; color: var(--text-muted); }
.range-count { margin: 6px 0 0; font-weight: 600; color: var(--success); font-size: 14px; }
.range-error { margin: 6px 0 0; font-weight: 600; color: var(--danger); font-size: 14px; }

/* Toggles */
.toggles { display: flex; flex-direction: column; gap: 10px; }
.toggle-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; padding: 10px 14px; border-radius: var(--radius-sm);
  background: #f8f9fb; cursor: pointer; border: 1px solid var(--border);
  font-size: 14px; font-weight: 500;
}
.toggle-row input { display: none; }
.toggle-ui {
  width: 44px; height: 24px; background: #ccc; border-radius: 20px;
  position: relative; transition: background .18s; flex-shrink: 0;
}
.toggle-ui::after {
  content: ''; position: absolute; top: 2px; left: 2px;
  width: 20px; height: 20px; background: #fff; border-radius: 50%;
  transition: transform .18s; box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}
.toggle-row input:checked + .toggle-ui { background: var(--success); }
.toggle-row input:checked + .toggle-ui::after { transform: translateX(20px); }

/* ==================== TEST VIEW ==================== */
.test-topbar {
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; flex-wrap: wrap; margin-bottom: 14px;
}
.test-topbar-left { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.test-topbar-left h2 { margin: 0; font-size: 18px; }
.test-topbar-right { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.timer {
  background: var(--card); padding: 6px 12px; border-radius: 20px;
  font-weight: 700; font-size: 14px; box-shadow: var(--shadow);
  color: var(--primary-dark);
}
.timer.danger { color: var(--danger); animation: pulse 1s infinite; }
.timer.infinite { color: var(--info); }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .55; } }
.score-live {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff; padding: 6px 14px; border-radius: 20px;
  font-weight: 700; font-size: 14px; box-shadow: var(--shadow);
}

.progress-wrap {
  position: relative; height: 10px; background: #e0e0e0;
  border-radius: 10px; margin-bottom: 18px; overflow: hidden;
}
.progress-bar {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transition: width .3s ease;
}
.progress-text {
  position: absolute; right: 8px; top: -22px;
  font-size: 12px; color: var(--text-muted); font-weight: 600;
}

.test-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 18px;
  align-items: start;
}

/* Navigator */
.navigator { position: sticky; top: 80px; }
.navigator h3 { margin: 0 0 10px; font-size: 15px; }
.nav-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.nav-cell {
  aspect-ratio: 1; border: 1.5px solid var(--border); background: #fff;
  border-radius: 8px; cursor: pointer; font-weight: 600; font-size: 13px;
  color: var(--text); transition: all .15s;
}
.nav-cell:hover { border-color: var(--primary); }
.nav-cell.current { background: var(--primary); color: #fff; border-color: var(--primary); }
.nav-cell.answered { background: #e3f2fd; border-color: var(--info); }
.nav-cell.correct { background: var(--success); color: #fff; border-color: var(--success); }
.nav-cell.wrong { background: var(--danger); color: #fff; border-color: var(--danger); }
.nav-legend {
  display: flex; flex-direction: column; gap: 5px; margin-top: 12px;
  font-size: 12px; color: var(--text-muted);
}
.nav-legend span { display: flex; align-items: center; gap: 6px; }
.dot { width: 12px; height: 12px; border-radius: 4px; display: inline-block; }
.dot-current { background: var(--primary); }
.dot-answered { background: #e3f2fd; border: 1.5px solid var(--info); }
.dot-correct { background: var(--success); }
.dot-wrong { background: var(--danger); }

/* Question area */
.question-area { animation: fadeIn .25s ease; }
.question-head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 12px; flex-wrap: wrap; gap: 6px;
}
.q-index { font-weight: 700; color: var(--primary-dark); }
.q-group { font-size: 12px; background: #f3e5f5; color: var(--primary-dark); padding: 3px 10px; border-radius: 20px; }
.question-text {
  font-size: 17px; font-weight: 600; line-height: 1.5;
  margin-bottom: 18px; padding: 14px; background: #faf7fd;
  border-left: 4px solid var(--primary); border-radius: 8px;
  white-space: pre-wrap; word-break: break-word;
}

.answers { display: flex; flex-direction: column; gap: 10px; }
.answer-item {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px; border-radius: var(--radius-sm);
  border: 1.8px solid var(--border); cursor: pointer;
  background: #fff; transition: all .15s; position: relative;
  user-select: none;
}
.answer-item:hover { border-color: var(--primary-light); background: #fdf7ff; }
.answer-item input { display: none; }
.answer-marker {
  width: 24px; height: 24px; border-radius: 50%;
  border: 2px solid var(--border); display: flex; align-items: center;
  justify-content: center; font-size: 13px; color: transparent;
  flex-shrink: 0; transition: all .15s;
}
.answer-item.multi .answer-marker { border-radius: 6px; }
.answer-item input:checked ~ .answer-marker {
  border-color: var(--primary); background: var(--primary); color: #fff;
}
.answer-text { flex: 1; font-size: 15px; word-break: break-word; }
.answer-kbd {
  font-size: 11px; background: #f0f0f0; color: var(--text-muted);
  padding: 2px 6px; border-radius: 5px; font-weight: 600;
}
.answer-item.revealed { cursor: default; }
.answer-item.revealed.correct { border-color: var(--success); background: #e8f5e9; }
.answer-item.revealed.correct .answer-marker { border-color: var(--success); background: var(--success); color: #fff; }
.answer-item.revealed.wrong { border-color: var(--danger); background: #ffebee; }
.answer-item.revealed.wrong .answer-marker { border-color: var(--danger); background: var(--danger); color: #fff; }
.answer-item.revealed.correct .answer-text { font-weight: 600; }
.answer-item.revealed.correct::after {
  content: '✔'; position: absolute; right: 12px; color: var(--success);
  font-weight: 700; font-size: 16px;
}

.question-feedback {
  margin-top: 14px; padding: 12px 16px; border-radius: var(--radius-sm);
  font-weight: 600; animation: fadeIn .2s ease;
}
.feedback-correct { background: #e8f5e9; color: var(--success); border-left: 4px solid var(--success); }
.feedback-wrong { background: #ffebee; color: var(--danger); border-left: 4px solid var(--danger); }
.feedback-unanswered { background: #fff8e1; color: #b26a00; border-left: 4px solid var(--warning); }

.question-actions {
  display: flex; justify-content: space-between; gap: 10px;
  margin-top: 20px; flex-wrap: wrap;
}
.kbd-hint { text-align: center; font-size: 12px; color: var(--text-muted); margin-top: 12px; }

/* ==================== RESULT ==================== */
.result-hero {
  text-align: center; padding: 30px 20px;
}
.hero-pass { background: linear-gradient(135deg, #e8f5e9, #c8e6c9); border: 2px solid var(--success); }
.hero-fail { background: linear-gradient(135deg, #ffebee, #ffcdd2); border: 2px solid var(--danger); }
.result-testname { font-size: 16px; color: var(--text-muted); margin-bottom: 8px; }
.result-score {
  font-size: 72px; font-weight: 800; line-height: 1;
  color: var(--primary-dark); margin: 8px 0;
}
.hero-pass .result-score { color: var(--success); }
.hero-fail .result-score { color: var(--danger); }
.result-label { font-size: 24px; font-weight: 700; margin-bottom: 6px; }
.result-passinfo { font-size: 14px; color: var(--text-muted); }

.result-cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px; margin-bottom: 18px;
}
.result-card {
  background: var(--card); border-radius: var(--radius);
  padding: 16px; text-align: center; box-shadow: var(--shadow);
}
.result-card-icon { font-size: 24px; margin-bottom: 4px; }
.result-card-value { font-size: 22px; font-weight: 700; color: var(--primary-dark); }
.result-card-label { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

.group-stats { display: flex; flex-direction: column; gap: 10px; }
.group-row {
  display: grid; grid-template-columns: 100px 1fr 60px 90px;
  gap: 10px; align-items: center; font-size: 14px;
}
.group-name { font-weight: 600; }
.group-bar-wrap { height: 12px; background: #e0e0e0; border-radius: 8px; overflow: hidden; }
.group-bar { height: 100%; background: linear-gradient(90deg, var(--primary), var(--primary-light)); transition: width .5s; }
.group-pct { font-weight: 700; text-align: right; color: var(--primary-dark); }
.group-info { color: var(--text-muted); font-size: 13px; text-align: right; }

.wrong-list { display: flex; flex-direction: column; gap: 14px; }
.wrong-item { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px; background: #fff; }
.wrong-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.wrong-idx { font-weight: 700; color: var(--primary-dark); }
.wrong-status { padding: 2px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.st-wrong { background: #ffebee; color: var(--danger); }
.st-unanswered { background: #fff8e1; color: #b26a00; }
.wrong-text { font-weight: 600; margin-bottom: 8px; white-space: pre-wrap; }
.wrong-answers { display: flex; flex-direction: column; gap: 4px; font-size: 13px; }
.wrong-answer-line { padding: 4px 8px; border-radius: 6px; }
.wrong-answer-line.is-correct { background: #e8f5e9; color: var(--success); font-weight: 600; }
.wrong-answer-line.is-wrong-selected { background: #ffebee; color: var(--danger); text-decoration: line-through; }

.result-actions { display: flex; gap: 10px; justify-content: center; margin-top: 20px; flex-wrap: wrap; }

/* ==================== STATS ==================== */
.stats-cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px; margin-bottom: 18px;
}
.stat-card {
  background: var(--card); border-radius: var(--radius);
  padding: 18px; text-align: center; box-shadow: var(--shadow);
}
.stat-icon { font-size: 26px; margin-bottom: 4px; }
.stat-value { font-size: 24px; font-weight: 800; color: var(--primary-dark); }
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.data-table th, .data-table td {
  padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border);
}
.data-table th { background: #f8f9fb; font-weight: 600; color: var(--text-muted); }
.data-table tr:hover td { background: #faf7fd; }

.history-list { display: flex; flex-direction: column; gap: 8px; }
.history-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px; border-radius: var(--radius-sm);
  border-left: 4px solid var(--border); background: #fafafa;
}
.hist-pass { border-left-color: var(--success); background: #f1f8e9; }
.hist-fail { border-left-color: var(--danger); background: #fff5f5; }
.hist-name { font-weight: 600; }
.hist-date { font-size: 12px; color: var(--text-muted); }
.hist-right { text-align: right; }
.hist-score { font-weight: 700; color: var(--primary-dark); }
.hist-status { font-size: 12px; }

/* ==================== BROWSE ==================== */
.filters { padding: 14px; }
.filter-row { display: flex; gap: 10px; flex-wrap: wrap; }
.filter-row .input { flex: 1; min-width: 160px; }
.group-mini-stats { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.chip {
  font-size: 12px; background: #f3e5f5; color: var(--primary-dark);
  padding: 3px 10px; border-radius: 20px; font-weight: 600;
}
.chip-info { background: #e3f2fd; color: var(--info); }
.chip-success { background: #e8f5e9; color: var(--success); }
.chip-bar { background: #eee; padding: 0; width: 120px; height: 18px; overflow: hidden; border-radius: 10px; position: relative; }
.chip-bar i { display: block; height: 100%; background: var(--primary); }

.browse-list { display: flex; flex-direction: column; gap: 12px; }
.browse-item {
  background: var(--card); border-radius: var(--radius);
  padding: 14px 16px; box-shadow: var(--shadow);
  border-left: 4px solid var(--border);
}
.browse-item.is-correct { border-left-color: var(--success); }
.browse-item.is-wrong { border-left-color: var(--danger); }
.browse-item.is-unanswered { border-left-color: var(--warning); }
.browse-head { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; flex-wrap: wrap; }
.browse-idx { font-weight: 700; color: var(--primary-dark); }
.browse-group { font-size: 12px; background: #f3e5f5; color: var(--primary-dark); padding: 2px 8px; border-radius: 20px; }
.browse-variants { font-size: 12px; color: var(--text-muted); }
.status-badge { padding: 2px 10px; border-radius: 20px; font-size: 12px; font-weight: 700; margin-left: auto; }
.st-correct { background: #e8f5e9; color: var(--success); }
.st-wrong { background: #ffebee; color: var(--danger); }
.st-unanswered { background: #fff8e1; color: #b26a00; }
.browse-question { font-weight: 600; margin-bottom: 10px; white-space: pre-wrap; word-break: break-word; }
.browse-answers { display: flex; flex-direction: column; gap: 4px; font-size: 14px; }
.browse-answer { padding: 6px 10px; border-radius: 6px; background: #fafafa; }
.browse-answer.no-color { color: var(--text-muted); }
.browse-answer.is-correct { background: #e8f5e9; color: var(--success); font-weight: 600; }
.browse-answer.is-wrong-selected { background: #ffebee; color: var(--danger); }
.browse-answer.is-selected { border: 1.5px solid var(--info); }
.tag {
  font-size: 10px; padding: 1px 6px; border-radius: 10px;
  margin-left: 8px; font-weight: 700;
}
.tag-correct { background: var(--success); color: #fff; }
.tag-wrong { background: var(--danger); color: #fff; }

/* ==================== TOAST ==================== */
.toast-container {
  position: fixed; right: 16px; bottom: 16px;
  display: flex; flex-direction: column; gap: 10px;
  z-index: 200; max-width: 340px;
}
.toast {
  background: #333; color: #fff; padding: 12px 18px;
  border-radius: var(--radius-sm); box-shadow: var(--shadow-lg);
  font-size: 14px; font-weight: 500;
  opacity: 0; transform: translateX(40px);
  transition: all .3s ease;
}
.toast.show { opacity: 1; transform: translateX(0); }
.toast-success { background: var(--success); }
.toast-danger { background: var(--danger); }
.toast-warning { background: var(--warning); color: #333; }
.toast-info { background: var(--info); }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 900px) {
  .test-layout { grid-template-columns: 1fr; }
  .navigator { position: static; }
  .nav-grid { grid-template-columns: repeat(8, 1fr); }
}

@media (max-width: 600px) {
  .header-inner { padding: 10px 12px; }
  .brand-text h1 { font-size: 15px; }
  .brand-text small { display: none; }
  .hide-sm { display: none; }
  .container { padding: 14px 10px 50px; }
  .file-grid { grid-template-columns: 1fr; }
  .result-score { font-size: 56px; }
  .nav-grid { grid-template-columns: repeat(6, 1fr); }
  .group-row { grid-template-columns: 80px 1fr 50px; }
  .group-info { display: none; }
  .test-topbar-left h2 { font-size: 15px; }
  .filter-row .input { min-width: 100%; }
  .form-row { flex-direction: column; }
}