/* EM Blueprint — Global Styles */

:root {
  --blueprint-blue: #0041BA;
  --deep-navy: #001E5F;
  --academic-blue: #3057E1;
  --clinical-light: #CFD8E8;
  --white: #FFFFFF;
  --charcoal: #1C1C1C;
  --amber-gold: #D38A00;
  --amber-light: #FFF3D4;
  --correct: #16a34a;
  --correct-bg: #dcfce7;
  --incorrect: #dc2626;
  --incorrect-bg: #fee2e2;
  --grey-100: #f3f4f6;
  --grey-200: #e5e7eb;
  --grey-400: #9ca3af;
  --grey-600: #4b5563;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(0,30,95,0.10);
  --shadow-sm: 0 2px 8px rgba(0,30,95,0.08);
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--charcoal);
  background: var(--grey-100);
  line-height: 1.6;
  min-height: 100vh;
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

h1 { font-size: 1.875rem; font-weight: 700; }
h2 { font-size: 1.5rem; font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1.125rem; font-weight: 600; }

a { color: var(--blueprint-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ============================================================
   LAYOUT
   ============================================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.page-content {
  padding: 32px 0;
}

/* ============================================================
   NAV
   ============================================================ */

.nav {
  background: var(--deep-navy);
  color: var(--white);
  height: 64px;
  display: flex;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--white);
  text-decoration: none;
}

.nav-brand-icon {
  width: 36px;
  height: 36px;
  background: var(--blueprint-blue);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.875rem;
  letter-spacing: -0.5px;
}

.nav-brand-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  border-radius: 8px;
  flex-shrink: 0;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-user {
  font-size: 0.875rem;
  color: var(--clinical-light);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  color: var(--clinical-light);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  transition: background 0.15s, color 0.15s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link-icon {
  width: 16px;
  height: 16px;
  object-fit: contain;
  opacity: 0.75;
  flex-shrink: 0;
}

.nav-link.active .nav-link-icon,
.nav-link:hover .nav-link-icon {
  opacity: 1;
}

.nav-link:hover, .nav-link.active {
  background: rgba(255,255,255,0.12);
  color: var(--white);
  text-decoration: none;
}

/* ============================================================
   CARDS
   ============================================================ */

.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.card-sm { padding: 16px; }

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--blueprint-blue);
  color: var(--white);
  border-color: var(--blueprint-blue);
}
.btn-primary:hover:not(:disabled) {
  background: var(--deep-navy);
  border-color: var(--deep-navy);
  color: var(--white);
  text-decoration: none;
}

.btn-secondary {
  background: transparent;
  color: var(--blueprint-blue);
  border-color: var(--blueprint-blue);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--clinical-light);
  color: var(--deep-navy);
  text-decoration: none;
}

.btn-ghost {
  background: transparent;
  color: var(--grey-600);
  border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
  background: var(--grey-100);
  color: var(--charcoal);
  text-decoration: none;
}

.btn-danger {
  background: transparent;
  color: var(--incorrect);
  border-color: var(--incorrect);
}
.btn-danger:hover:not(:disabled) {
  background: var(--incorrect-bg);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1rem;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.875rem;
}

.btn-block {
  width: 100%;
}

/* ============================================================
   FORMS
   ============================================================ */

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--grey-200);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  color: var(--charcoal);
  background: var(--white);
  transition: border-color 0.15s;
  outline: none;
}

.form-control:focus {
  border-color: var(--blueprint-blue);
  box-shadow: 0 0 0 3px rgba(0,65,186,0.12);
}

.form-control::placeholder { color: var(--grey-400); }

select.form-control { cursor: pointer; }

.form-hint {
  font-size: 0.8125rem;
  color: var(--grey-600);
  margin-top: 4px;
}

.form-error {
  font-size: 0.8125rem;
  color: var(--incorrect);
  margin-top: 4px;
  display: none;
}

.form-error.visible { display: block; }

/* Consent checkboxes */
.consent-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 4px 0 20px;
  padding: 14px 16px;
  background: #F8FAFF;
  border: 1px solid var(--clinical-light);
  border-radius: var(--radius-sm);
}

.consent-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--charcoal);
  line-height: 1.5;
  cursor: pointer;
}

.consent-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  min-width: 16px;
  margin-top: 2px;
  accent-color: var(--blueprint-blue);
  cursor: pointer;
}

.consent-label a {
  color: var(--blueprint-blue);
  text-decoration: underline;
}

.consent-label a:hover { opacity: 0.8; }

/* ============================================================
   BADGES
   ============================================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-blue { background: var(--clinical-light); color: var(--deep-navy); }
.badge-gold { background: var(--amber-light); color: var(--amber-gold); }
.badge-green { background: var(--correct-bg); color: var(--correct); }
.badge-red { background: var(--incorrect-bg); color: var(--incorrect); }
.badge-grey { background: var(--grey-100); color: var(--grey-600); }
.badge-locked { background: var(--grey-100); color: var(--grey-400); }

/* ============================================================
   STATS CARDS (Dashboard)
   ============================================================ */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--grey-600);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--deep-navy);
  line-height: 1;
}

.stat-sub {
  font-size: 0.8125rem;
  color: var(--grey-600);
}

/* ============================================================
   QUICK ACTIONS
   ============================================================ */

.actions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.action-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.15s ease;
  text-decoration: none;
  color: var(--charcoal);
}

.action-card:hover {
  border-color: var(--blueprint-blue);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  text-decoration: none;
  color: var(--charcoal);
}

.action-card.locked {
  opacity: 0.6;
  cursor: not-allowed;
}

.action-card.locked:hover {
  transform: none;
  border-color: transparent;
}

.action-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.action-icon-blue { background: var(--clinical-light); }
.action-icon-gold { background: var(--amber-light); }
.action-icon-green { background: var(--correct-bg); }
.action-icon-grey { background: var(--grey-100); }

.action-title {
  font-weight: 700;
  font-size: 0.9375rem;
}

.action-desc {
  font-size: 0.8125rem;
  color: var(--grey-600);
}

/* ============================================================
   WEAK TOPICS SECTION
   ============================================================ */

.weak-topics-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.weak-topic-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.weak-topic-name { font-weight: 500; font-size: 0.9375rem; }

.weak-topic-bar-wrap {
  flex: 1;
  height: 8px;
  background: var(--grey-200);
  border-radius: 999px;
  overflow: hidden;
}

.weak-topic-bar {
  height: 100%;
  background: var(--blueprint-blue);
  border-radius: 999px;
  transition: width 0.5s ease;
}

.weak-topic-pct {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--grey-600);
  min-width: 40px;
  text-align: right;
}

/* ============================================================
   PRACTICE PAGE — FILTER PANEL
   ============================================================ */

.practice-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 24px;
  align-items: start;
}

.filter-panel {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  position: sticky;
  top: 88px;
}

.filter-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--deep-navy);
}

.filter-section {
  margin-bottom: 20px;
}

.filter-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--grey-600);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 8px;
  display: block;
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid var(--grey-200);
  background: var(--white);
  color: var(--grey-600);
  transition: all 0.12s;
}

.chip:hover { border-color: var(--blueprint-blue); color: var(--blueprint-blue); }
.chip.active { background: var(--blueprint-blue); border-color: var(--blueprint-blue); color: var(--white); }

.count-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ============================================================
   PRACTICE PAGE — QUESTION AREA
   ============================================================ */

.question-area { flex: 1; }

.question-header {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px 24px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.progress-info {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--grey-600);
  white-space: nowrap;
}

.progress-bar-wrap {
  flex: 1;
  height: 8px;
  background: var(--clinical-light);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--blueprint-blue);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.timer {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--grey-600);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.question-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-bottom: 20px;
}

.question-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.question-stem {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--charcoal);
  margin-bottom: 24px;
}

/* ============================================================
   OPTION CARDS
   ============================================================ */

.options-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.option-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  border: 2px solid var(--grey-200);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  background: var(--white);
  user-select: none;
}

.option-card:hover:not(.answered) {
  border-color: var(--blueprint-blue);
  background: #f0f4ff;
}

.option-letter {
  width: 32px;
  height: 32px;
  min-width: 32px;
  border-radius: 50%;
  border: 2px solid var(--grey-200);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.875rem;
  color: var(--grey-600);
  transition: all 0.15s ease;
}

.option-text {
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--charcoal);
  padding-top: 4px;
}

/* Option states */
.option-card.selected {
  border-color: var(--academic-blue);
  background: #eef2ff;
}
.option-card.selected .option-letter {
  background: var(--academic-blue);
  border-color: var(--academic-blue);
  color: var(--white);
}

.option-card.correct {
  border-color: var(--correct);
  background: var(--correct-bg);
}
.option-card.correct .option-letter {
  background: var(--correct);
  border-color: var(--correct);
  color: var(--white);
}

.option-card.incorrect {
  border-color: var(--incorrect);
  background: var(--incorrect-bg);
}
.option-card.incorrect .option-letter {
  background: var(--incorrect);
  border-color: var(--incorrect);
  color: var(--white);
}

.option-card.answered { cursor: default; }

/* ============================================================
   EXPLANATION PANEL
   ============================================================ */

.explanation-panel {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  margin-top: 20px;
  display: none;
  animation: slideIn 0.25s ease;
}

.explanation-panel.visible { display: block; }

@keyframes slideIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.explanation-result {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--grey-200);
}

.result-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.result-icon.correct-icon { background: var(--correct-bg); }
.result-icon.incorrect-icon { background: var(--incorrect-bg); }

.result-text { font-size: 1.125rem; font-weight: 700; }
.result-text.correct-text { color: var(--correct); }
.result-text.incorrect-text { color: var(--incorrect); }

.explanation-heading {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--grey-600);
  margin-bottom: 10px;
  margin-top: 20px;
}

.explanation-text {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--charcoal);
  white-space: pre-wrap;
}

.key-pearl {
  background: var(--amber-light);
  border-left: 4px solid var(--amber-gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 18px;
  margin-top: 20px;
}

.key-pearl-label {
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--amber-gold);
  margin-bottom: 6px;
}

.key-pearl-text {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--charcoal);
  line-height: 1.5;
}

.explanation-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 2px solid var(--grey-200);
  gap: 12px;
}

/* ============================================================
   SESSION SUMMARY
   ============================================================ */

.session-summary {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px;
  text-align: center;
  display: none;
}

.session-summary.visible { display: block; }

.summary-score {
  font-size: 4rem;
  font-weight: 900;
  color: var(--blueprint-blue);
  line-height: 1;
}

.summary-score-label {
  font-size: 1.125rem;
  color: var(--grey-600);
  margin-top: 8px;
  margin-bottom: 32px;
}

.summary-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

/* ============================================================
   PERFORMANCE PAGE
   ============================================================ */

.perf-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.chart-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.chart-card.full-width {
  grid-column: 1 / -1;
}

.chart-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--deep-navy);
  margin-bottom: 20px;
}

/* ============================================================
   TABLES
   ============================================================ */

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--grey-200);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th {
  background: var(--clinical-light);
  color: var(--deep-navy);
  font-weight: 700;
  padding: 12px 16px;
  text-align: left;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  white-space: nowrap;
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--grey-200);
  vertical-align: middle;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: #f8faff; }

/* ============================================================
   LOGIN PAGE
   ============================================================ */

.auth-page {
  min-height: 100vh;
  background: var(--deep-navy);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.auth-card {
  background: var(--white);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  padding: 40px;
  width: 100%;
  max-width: 440px;
}

.auth-logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  text-align: center;
}

.auth-logo-icon {
  width: 56px;
  height: 56px;
  background: var(--blueprint-blue);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.125rem;
  color: var(--white);
  letter-spacing: -1px;
}

.auth-logo-title {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--deep-navy);
}

.auth-logo-sub {
  font-size: 0.875rem;
  color: var(--grey-600);
  margin-top: -4px;
}

.auth-tabs {
  display: flex;
  border-bottom: 2px solid var(--grey-200);
  margin-bottom: 28px;
}

.auth-tab {
  flex: 1;
  padding: 10px;
  text-align: center;
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  color: var(--grey-600);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.15s;
}

.auth-tab.active {
  color: var(--blueprint-blue);
  border-bottom-color: var(--blueprint-blue);
}

.auth-form { display: none; }
.auth-form.active { display: block; }

.auth-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 0.875rem;
  color: var(--grey-600);
}

.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 16px;
  display: none;
}

.alert.visible { display: block; }
.alert-error { background: var(--incorrect-bg); color: var(--incorrect); border: 1px solid #fca5a5; }
.alert-success { background: var(--correct-bg); color: var(--correct); border: 1px solid #86efac; }
.alert-info { background: var(--clinical-light); color: var(--deep-navy); }

/* ============================================================
   EMPTY STATES
   ============================================================ */

.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--grey-400);
}

.empty-state-icon { font-size: 2.5rem; margin-bottom: 12px; }
.empty-state-text { font-size: 1rem; font-weight: 500; }
.empty-state-sub { font-size: 0.875rem; margin-top: 6px; }

/* ============================================================
   LOADING
   ============================================================ */

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--clinical-light);
  border-top-color: var(--blueprint-blue);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 60px;
  color: var(--grey-600);
  font-size: 0.9375rem;
}

/* ============================================================
   SECTION HEADER
   ============================================================ */

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.section-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--deep-navy);
}

/* ============================================================
   QUESTION NAVIGATOR SIDEBAR
   ============================================================ */

.session-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 20px;
  align-items: start;
}

.q-navigator {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  position: sticky;
  top: 88px;
  max-height: calc(100vh - 110px);
  overflow-y: auto;
}

.q-nav-title {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--grey-600);
  margin-bottom: 14px;
}

.q-nav-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin-bottom: 20px;
}

.q-nav-btn {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 8px;
  border: 2px solid var(--grey-200);
  background: var(--white);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--grey-600);
  cursor: pointer;
  transition: all 0.12s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.q-nav-btn:hover { border-color: var(--blueprint-blue); color: var(--blueprint-blue); }
.q-nav-btn.current { border-color: var(--blueprint-blue); background: var(--blueprint-blue); color: var(--white); }
.q-nav-btn.correct { border-color: var(--correct); background: var(--correct-bg); color: var(--correct); }
.q-nav-btn.incorrect { border-color: var(--incorrect); background: var(--incorrect-bg); color: var(--incorrect); }
.q-nav-btn.flagged { border-color: var(--amber-gold); background: var(--amber-light); color: var(--amber-gold); }
.q-nav-btn.flagged.correct { border-color: var(--amber-gold); background: var(--amber-light); color: var(--amber-gold); }
.q-nav-btn.flagged.incorrect { border-color: var(--amber-gold); background: var(--amber-light); color: var(--amber-gold); }

.q-nav-legend {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--grey-200);
}

.q-nav-legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--grey-600);
}

.q-nav-dot {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 2px solid var(--grey-200);
  flex-shrink: 0;
}
.q-nav-dot.dot-current { background: var(--blueprint-blue); border-color: var(--blueprint-blue); }
.q-nav-dot.dot-correct { background: var(--correct-bg); border-color: var(--correct); }
.q-nav-dot.dot-incorrect { background: var(--incorrect-bg); border-color: var(--incorrect); }
.q-nav-dot.dot-flagged { background: var(--amber-light); border-color: var(--amber-gold); }
.q-nav-dot.dot-unanswered { background: var(--white); border-color: var(--grey-200); }

/* ============================================================
   DUAL TIMER
   ============================================================ */

.timer-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.timer-item {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.timer-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--grey-400);
  line-height: 1;
}

.timer-value {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--grey-600);
  font-variant-numeric: tabular-nums;
}

.timer-divider {
  width: 1px;
  height: 28px;
  background: var(--grey-200);
}

/* ============================================================
   PEER ANSWER DISTRIBUTION
   ============================================================ */

.peer-distribution {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--grey-200);
}

.peer-heading {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--grey-600);
  margin-bottom: 12px;
}

.peer-bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.peer-bar-letter {
  width: 22px;
  font-size: 0.8125rem;
  font-weight: 800;
  color: var(--grey-600);
  flex-shrink: 0;
}

.peer-bar-wrap {
  flex: 1;
  height: 18px;
  background: var(--grey-100);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.peer-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: var(--clinical-light);
  transition: width 0.5s ease;
}

.peer-bar-fill.is-correct { background: var(--correct-bg); }
.peer-bar-fill.is-selected-wrong { background: var(--incorrect-bg); }

.peer-bar-pct {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--grey-600);
  min-width: 36px;
  text-align: right;
}

/* ============================================================
   PREV/NEXT NAVIGATION
   ============================================================ */

.question-nav-btns {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ============================================================
   TOPIC PROGRESS BARS (filter panel)
   ============================================================ */

.topic-progress-wrap {
  margin-top: 12px;
  background: var(--grey-100);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.topic-progress-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--grey-600);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 10px;
}

.topic-prog-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.topic-prog-name {
  font-size: 0.8rem;
  color: var(--charcoal);
  min-width: 90px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topic-prog-bar-wrap {
  flex: 1;
  height: 6px;
  background: var(--grey-200);
  border-radius: 999px;
  overflow: hidden;
}

.topic-prog-bar-fill {
  height: 100%;
  background: var(--blueprint-blue);
  border-radius: 999px;
}

.topic-prog-count {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--grey-600);
  min-width: 40px;
  text-align: right;
  white-space: nowrap;
}

/* ============================================================
   PERCENTILE CARD (session summary)
   ============================================================ */

.percentile-card {
  background: var(--deep-navy);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 28px;
  color: var(--white);
  text-align: center;
}

.percentile-value {
  font-size: 3rem;
  font-weight: 900;
  color: var(--clinical-light);
  line-height: 1;
}

.percentile-label {
  font-size: 0.875rem;
  color: var(--clinical-light);
  margin-top: 6px;
  opacity: 0.8;
}

.percentile-bar-wrap {
  height: 8px;
  background: rgba(255,255,255,0.15);
  border-radius: 999px;
  margin: 16px 0 8px;
  overflow: hidden;
  position: relative;
}

.percentile-bar-fill {
  height: 100%;
  background: var(--amber-gold);
  border-radius: 999px;
  transition: width 0.8s ease;
}

.percentile-marker {
  position: absolute;
  top: -4px;
  width: 16px;
  height: 16px;
  background: var(--amber-gold);
  border-radius: 50%;
  border: 2px solid var(--white);
  transform: translateX(-50%);
  transition: left 0.8s ease;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Dashboard bottom row: 2 columns on desktop, 1 on mobile */
.bottom-row-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .actions-grid { grid-template-columns: repeat(2, 1fr); }
  .bottom-row-grid { grid-template-columns: 1fr; }
  .practice-layout { grid-template-columns: 1fr; }
  .filter-panel { position: static; }
  .perf-grid { grid-template-columns: 1fr; }
  .perf-grid .chart-card.full-width { grid-column: 1; }
  .session-layout { grid-template-columns: 1fr; }
  .q-navigator { position: static; max-height: none; }
  .q-nav-grid { grid-template-columns: repeat(8, 1fr); }
}

@media (max-width: 640px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .actions-grid { grid-template-columns: 1fr 1fr; }
  .bottom-row-grid { grid-template-columns: 1fr; }
  .auth-card { padding: 28px 20px; }
  .question-card { padding: 20px; }
  .explanation-panel { padding: 20px; }
  .summary-stats { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  h1 { font-size: 1.5rem; }
}

@media (max-width: 400px) {
  .actions-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   UTILITY
   ============================================================ */

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--grey-600); }
.text-small { font-size: 0.875rem; }
.text-bold { font-weight: 700; }
.text-blue { color: var(--blueprint-blue); }
.text-gold { color: var(--amber-gold); }
.text-correct { color: var(--correct); }
.text-incorrect { color: var(--incorrect); }

.mt-4 { margin-top: 4px; }
.mt-8 { margin-top: 8px; }
.mt-12 { margin-top: 12px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-4 { margin-bottom: 4px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }

.hidden { display: none !important; }
.visible { display: block !important; }

/* ============================================================
   WATERMARK
   ============================================================ */

/* Single floating watermark */
.em-watermark {
  position: fixed;
  pointer-events: none;
  user-select: none;
  -webkit-user-select: none;
  white-space: nowrap;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--deep-navy);
  opacity: 0.16;
  transform: rotate(-35deg);
  transform-origin: center center;
  z-index: 9999;
  transition: top 2s ease, left 2s ease;
}

/* Prevent question content selection */
.question-stem,
.option-card,
.explanation-panel,
.key-pearl {
  user-select: none;
  -webkit-user-select: none;
}

/* Print protection — hide content, show warning */
@media print {
  body * { visibility: hidden !important; }
  body::before {
    content: 'Printing is not permitted. All content is protected under UAE copyright law.';
    visibility: visible !important;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.2rem;
    font-weight: 700;
    color: #001E5F;
    text-align: center;
    max-width: 400px;
  }
}

/* ============================================================
   COPYRIGHT MODAL
   ============================================================ */

.copyright-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 30, 95, 0.7);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.copyright-modal {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px;
  max-width: 520px;
  width: 100%;
  box-shadow: 0 20px 60px rgba(0, 30, 95, 0.3);
}

.copyright-modal-icon {
  width: 48px;
  height: 48px;
  background: #FFF3D6;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.5rem;
}

.copyright-modal h2 {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--deep-navy);
  margin-bottom: 12px;
}

.copyright-modal p {
  font-size: 0.9rem;
  color: #374151;
  line-height: 1.7;
  margin-bottom: 10px;
}

.copyright-modal ul {
  font-size: 0.875rem;
  color: #374151;
  line-height: 1.7;
  padding-left: 20px;
  margin-bottom: 16px;
}

.copyright-modal ul li { margin-bottom: 4px; }

.copyright-modal-footer {
  border-top: 1px solid #e5e7eb;
  padding-top: 16px;
  margin-top: 8px;
}

.copyright-modal-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--charcoal);
  cursor: pointer;
  margin-bottom: 16px;
}

.copyright-modal-check input[type="checkbox"] {
  width: 16px;
  height: 16px;
  min-width: 16px;
  margin-top: 2px;
  accent-color: var(--blueprint-blue);
}

/* ══════════════════════════════════════════════════════════════
   MOCK EXAM — Setup
══════════════════════════════════════════════════════════════ */

.mock-type-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 800px;
  margin: 0 auto 28px;
}

@media (max-width: 700px) {
  .mock-type-grid { grid-template-columns: repeat(2, 1fr); }
}

.mock-type-card {
  background: #fff;
  border: 2px solid var(--grey-200);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
}

.mock-type-card:hover {
  border-color: var(--blueprint-blue);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.mock-type-card.active {
  border-color: var(--blueprint-blue);
  background: #eef2ff;
  box-shadow: 0 0 0 3px rgba(0,65,186,0.15);
}

.mock-type-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.mock-type-name {
  font-weight: 800;
  color: var(--deep-navy);
  font-size: 1rem;
  margin-bottom: 4px;
}

.mock-type-detail {
  font-size: 0.875rem;
  color: var(--charcoal);
  font-weight: 600;
  margin-bottom: 2px;
}

.mock-type-time {
  font-size: 0.8rem;
  color: #6b7280;
  margin-bottom: 10px;
}

.mock-type-badge {
  font-size: 0.72rem;
  background: var(--clinical-light);
  color: var(--deep-navy);
  border-radius: 999px;
  padding: 2px 10px;
  display: inline-block;
  font-weight: 600;
}

/* ══════════════════════════════════════════════════════════════
   MOCK EXAM — Exam Header & Timer
══════════════════════════════════════════════════════════════ */

.exam-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--deep-navy);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius);
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 0;
}

.exam-brand {
  font-size: 0.8rem;
  opacity: 0.7;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.exam-progress-info {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--clinical-light);
  margin-top: 2px;
}

.exam-timer-wrap {
  text-align: center;
}

.exam-timer {
  font-size: 2rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: 2px;
  color: #fff;
  transition: color 0.3s;
}

.exam-timer.timer-warning {
  color: var(--amber-gold);
  animation: pulse-warning 1.5s infinite;
}

.exam-timer.timer-critical {
  color: #ef4444;
  animation: pulse-critical 0.7s infinite;
}

@keyframes pulse-warning {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.7; }
}

@keyframes pulse-critical {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.exam-timer-label {
  font-size: 0.7rem;
  opacity: 0.6;
  text-align: center;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.exam-progress-bar-wrap {
  background: rgba(0,30,95,0.12);
  height: 4px;
  border-radius: 0;
  overflow: hidden;
  margin-bottom: 4px;
}

.exam-progress-bar-fill {
  height: 100%;
  background: var(--blueprint-blue);
  transition: width 0.4s ease;
  border-radius: 0;
}

/* ══════════════════════════════════════════════════════════════
   MOCK EXAM — Option cards (exam mode — no colour feedback)
══════════════════════════════════════════════════════════════ */

.option-card.exam-mode {
  cursor: pointer;
  transition: border-color 0.1s, background 0.1s;
}

.option-card.exam-selected {
  border-color: var(--deep-navy);
  background: var(--clinical-light);
}

.option-card.exam-selected .option-label {
  background: var(--deep-navy);
  color: #fff;
  border-color: var(--deep-navy);
}

/* Review mode: correct / wrong after submission */
.option-card.correct-answer {
  border-color: var(--correct);
  background: #f0fdf4;
}

.option-card.correct-answer .option-label {
  background: var(--correct);
  color: #fff;
  border-color: var(--correct);
}

.option-card.wrong-answer {
  border-color: var(--incorrect);
  background: #fef2f2;
}

.option-card.wrong-answer .option-label {
  background: var(--incorrect);
  color: #fff;
  border-color: var(--incorrect);
}

/* ══════════════════════════════════════════════════════════════
   MOCK EXAM — Navigator dots (answered)
══════════════════════════════════════════════════════════════ */

.q-nav-dot.dot-answered {
  background: var(--blueprint-blue);
  color: #fff;
  border-color: var(--blueprint-blue);
}

/* ══════════════════════════════════════════════════════════════
   MOCK EXAM — Results Hero
══════════════════════════════════════════════════════════════ */

.mock-results-hero {
  text-align: center;
  padding: 36px 24px 28px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 0;
}

.mock-scaled-score-wrap {
  margin-bottom: 24px;
}

.mock-scaled-score {
  font-size: 5rem;
  font-weight: 900;
  color: var(--deep-navy);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.mock-scaled-label {
  font-size: 0.875rem;
  color: #6b7280;
  margin-top: 4px;
  margin-bottom: 12px;
}

.mock-pass-badge {
  display: inline-block;
  font-size: 1.1rem;
  font-weight: 800;
  padding: 6px 24px;
  border-radius: 999px;
  letter-spacing: 1px;
}

.verdict-pass       { background: #dcfce7; color: #166534; }
.verdict-borderline { background: #fef3c7; color: #92400e; }
.verdict-fail       { background: #fee2e2; color: #991b1b; }

/* Score gauge */
.mock-score-gauge-wrap {
  max-width: 480px;
  margin: 0 auto;
}

.mock-score-gauge {
  position: relative;
  margin-top: 20px;
}

.gauge-track {
  display: flex;
  height: 16px;
  border-radius: 999px;
  overflow: hidden;
}

.gauge-fill-fail   { background: #ef4444; }
.gauge-fill-border { background: var(--amber-gold); }
.gauge-fill-pass   { background: var(--correct); }

.gauge-labels {
  display: flex;
  align-items: center;
  position: relative;
  font-size: 0.75rem;
  color: #6b7280;
  margin-top: 4px;
}

.gauge-marker {
  position: absolute;
  top: -4px;
  width: 20px;
  height: 24px;
  background: var(--deep-navy);
  border-radius: 4px;
  transform: translateX(-50%);
  transition: left 0.8s ease;
  box-shadow: 0 2px 8px rgba(0,30,95,0.3);
}

/* ══════════════════════════════════════════════════════════════
   MOCK EXAM — Review
══════════════════════════════════════════════════════════════ */

.review-card {
  border-left: 4px solid var(--grey-200);
}

.review-option {
  pointer-events: none;
  cursor: default;
}

.badge-red {
  background: #fee2e2;
  color: #991b1b;
}

.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }