/* =============================================================
   Mockerly — Modern Minimal Enhancement Layer
   Loaded after main.css to progressively upgrade the UI.
   Uses existing HSL CSS variables (--base, --base-two, etc.)
   ============================================================= */

/* ── Google Fonts upgrade ─────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* ── Design tokens ────────────────────────────────────────── */
:root {
  --mk-radius:       12px;
  --mk-radius-sm:    8px;
  --mk-radius-lg:    20px;
  --mk-shadow-xs:    0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --mk-shadow-sm:    0 4px 6px -1px rgba(0,0,0,.07), 0 2px 4px -1px rgba(0,0,0,.04);
  --mk-shadow-md:    0 10px 15px -3px rgba(0,0,0,.08), 0 4px 6px -2px rgba(0,0,0,.04);
  --mk-shadow-lg:    0 20px 25px -5px rgba(0,0,0,.10), 0 10px 10px -5px rgba(0,0,0,.04);
  --mk-transition:   all .2s cubic-bezier(.4,0,.2,1);
  --mk-success:      #10b981;
  --mk-danger:       #ef4444;
  --mk-warning:      #f59e0b;
  --mk-info:         #3b82f6;
  --mk-muted:        #6b7280;
  --mk-border:       #e5e7eb;
  --mk-surface:      #f9fafb;
  --mk-white:        #ffffff;
}

/* ── Base resets ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: 'Inter', var(--body-font, sans-serif);
  -webkit-font-smoothing: antialiased;
}

/* ── Smooth page scroll ───────────────────────────────────── */
html { scroll-behavior: smooth; }

/* ══════════════════════════════════════════════════════════
   HEADER / NAVIGATION
   ══════════════════════════════════════════════════════════ */
.header {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: var(--mk-transition);
}

.header .navbar-brand img { height: 38px; }

.header .navbar .nav-link {
  font-size: .875rem;
  font-weight: 500;
  letter-spacing: .01em;
  padding: .5rem .85rem;
  border-radius: var(--mk-radius-sm);
  transition: var(--mk-transition);
}

.header .navbar .nav-item.active .nav-link,
.header .navbar .nav-link:hover {
  background: hsl(var(--base)/.12);
  color: hsl(var(--base)) !important;
}

/* pill buttons in header */
.header .btn.pill { border-radius: 999px; font-size: .85rem; font-weight: 600; }

/* ══════════════════════════════════════════════════════════
   CARDS
   ══════════════════════════════════════════════════════════ */
.card, .custom--card {
  border-radius: var(--mk-radius) !important;
  border: 1px solid var(--mk-border) !important;
  box-shadow: var(--mk-shadow-sm) !important;
  transition: var(--mk-transition);
  overflow: hidden;
}

.card:hover, .custom--card:hover {
  box-shadow: var(--mk-shadow-md) !important;
  transform: translateY(-1px);
}

/* stat cards */
.mk-stat-card {
  background: var(--mk-white);
  border: 1px solid var(--mk-border);
  border-radius: var(--mk-radius);
  padding: 1.4rem 1.6rem;
  box-shadow: var(--mk-shadow-xs);
  transition: var(--mk-transition);
  position: relative;
  overflow: hidden;
}
.mk-stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: hsl(var(--base));
}
.mk-stat-card:hover { box-shadow: var(--mk-shadow-md); transform: translateY(-2px); }
.mk-stat-card .mk-stat-value { font-size: 2rem; font-weight: 700; line-height: 1; color: #111; }
.mk-stat-card .mk-stat-label { font-size: .78rem; font-weight: 500; color: var(--mk-muted); text-transform: uppercase; letter-spacing: .05em; margin-top: .35rem; }
.mk-stat-card .mk-stat-icon {
  width: 48px; height: 48px;
  border-radius: var(--mk-radius-sm);
  background: hsl(var(--base)/.1);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.35rem; color: hsl(var(--base));
}

/* ══════════════════════════════════════════════════════════
   BUTTONS
   ══════════════════════════════════════════════════════════ */
.btn {
  border-radius: var(--mk-radius-sm) !important;
  font-weight: 500;
  font-size: .875rem;
  transition: var(--mk-transition);
  letter-spacing: .01em;
}
.btn--base {
  background: hsl(var(--base)) !important;
  border-color: hsl(var(--base)) !important;
  color: #fff !important;
}
.btn--base:hover { filter: brightness(1.08); transform: translateY(-1px); box-shadow: 0 4px 12px hsl(var(--base)/.35) !important; }

.btn-outline--base {
  border: 1.5px solid hsl(var(--base)) !important;
  color: hsl(var(--base)) !important;
  background: transparent !important;
}
.btn-outline--base:hover { background: hsl(var(--base)) !important; color: #fff !important; }

/* ══════════════════════════════════════════════════════════
   FORMS
   ══════════════════════════════════════════════════════════ */
.form-control, .form--control {
  border-radius: var(--mk-radius-sm) !important;
  border: 1.5px solid var(--mk-border) !important;
  font-size: .9rem;
  padding: .6rem .9rem;
  transition: var(--mk-transition);
}
.form-control:focus, .form--control:focus {
  border-color: hsl(var(--base)) !important;
  box-shadow: 0 0 0 3px hsl(var(--base)/.12) !important;
  outline: none;
}

/* ══════════════════════════════════════════════════════════
   TABLES
   ══════════════════════════════════════════════════════════ */
.table {
  border-radius: var(--mk-radius);
  overflow: hidden;
  font-size: .875rem;
}
.table thead th {
  background: var(--mk-surface) !important;
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--mk-muted) !important;
  border-bottom: 1px solid var(--mk-border) !important;
  padding: .85rem 1rem !important;
}
.table tbody tr { transition: var(--mk-transition); }
.table tbody tr:hover { background: hsl(var(--base)/.03) !important; }
.table tbody td { padding: .85rem 1rem !important; vertical-align: middle; border-color: var(--mk-border) !important; }

/* ══════════════════════════════════════════════════════════
   BADGES / PILLS
   ══════════════════════════════════════════════════════════ */
.badge {
  border-radius: 999px !important;
  font-size: .72rem !important;
  font-weight: 600 !important;
  padding: .3em .75em !important;
  letter-spacing: .03em;
}
.badge-success, .badge.bg-success { background: #d1fae5 !important; color: #065f46 !important; }
.badge-danger,  .badge.bg-danger  { background: #fee2e2 !important; color: #991b1b !important; }
.badge-warning, .badge.bg-warning { background: #fef3c7 !important; color: #92400e !important; }
.badge-info,    .badge.bg-info    { background: #dbeafe !important; color: #1e40af !important; }

/* ══════════════════════════════════════════════════════════
   TOPBAR (user dashboard header row)
   ══════════════════════════════════════════════════════════ */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
  padding: 1rem 0 1.5rem;
  margin-bottom: .5rem;
}
.topbar__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #111;
}

/* ══════════════════════════════════════════════════════════
   EXAM START PAGE
   ══════════════════════════════════════════════════════════ */

/* Sticky exam top bar */
#examTopBar {
  background: rgba(255,255,255,.95) !important;
  backdrop-filter: blur(8px);
  border-radius: 0 0 var(--mk-radius) var(--mk-radius);
  border-bottom: 1px solid var(--mk-border) !important;
  box-shadow: var(--mk-shadow-sm);
  padding: .75rem 1.25rem !important;
}

/* Navigator buttons */
.q-nav-btn {
  border-radius: 8px !important;
  font-size: .78rem !important;
  font-weight: 600 !important;
  min-width: 36px !important;
  height: 36px;
  padding: 0 !important;
  line-height: 36px;
  text-align: center;
  border: 1.5px solid var(--mk-border) !important;
  background: var(--mk-white) !important;
  color: #555 !important;
  transition: var(--mk-transition);
}
.q-nav-btn:hover { border-color: hsl(var(--base)) !important; color: hsl(var(--base)) !important; }
.q-nav-btn.answered { background: hsl(var(--base)) !important; border-color: hsl(var(--base)) !important; color: #fff !important; }
.q-nav-btn.flagged  { background: #fef3c7 !important; border-color: #f59e0b !important; color: #92400e !important; }
.q-nav-btn.answered.flagged { background: #f59e0b !important; border-color: #d97706 !important; color: #fff !important; }

/* Question cards */
.exam-qsn {
  background: var(--mk-white);
  border: 1.5px solid var(--mk-border);
  border-radius: var(--mk-radius);
  box-shadow: var(--mk-shadow-xs);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  transition: var(--mk-transition);
  scroll-margin-top: 90px;
}
.exam-qsn:hover { border-color: hsl(var(--base)/.4); box-shadow: var(--mk-shadow-sm); }
.exam-qsn.is-flagged { border-color: #f59e0b; background: #fffbeb; }

.exam-qsn-title { font-size: 1rem; font-weight: 600; color: #111; line-height: 1.55; margin-bottom: 1rem; }

/* Options */
.exam-qsn-item {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1rem;
  border: 1.5px solid var(--mk-border);
  border-radius: var(--mk-radius-sm);
  margin-bottom: .5rem;
  cursor: pointer;
  transition: var(--mk-transition);
  background: var(--mk-surface);
  font-size: .9rem;
  font-weight: 400;
}
.exam-qsn-item:hover { border-color: hsl(var(--base)/.5); background: hsl(var(--base)/.04); }
.exam-qsn-item.selected,
.exam-qsn-item:has(input:checked) {
  border-color: hsl(var(--base)) !important;
  background: hsl(var(--base)/.08) !important;
  color: hsl(var(--base-two));
  font-weight: 500;
}

.exam-qsn-item__label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--mk-border);
  font-size: .78rem;
  font-weight: 700;
  flex-shrink: 0;
  transition: var(--mk-transition);
}
.exam-qsn-item:has(input:checked) .exam-qsn-item__label {
  background: hsl(var(--base));
  color: #fff;
}

/* Bookmark/flag button */
.mk-flag-btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .3rem .75rem;
  border-radius: 999px;
  border: 1.5px solid var(--mk-border);
  background: var(--mk-white);
  font-size: .78rem;
  font-weight: 600;
  color: var(--mk-muted);
  cursor: pointer;
  transition: var(--mk-transition);
  float: right;
  margin-top: -.3rem;
}
.mk-flag-btn:hover { border-color: #f59e0b; color: #92400e; background: #fef3c7; }
.mk-flag-btn.active { background: #fef3c7; border-color: #f59e0b; color: #92400e; }
.mk-flag-btn .mk-flag-icon { font-size: .9rem; }

/* Progress bar */
.progress { border-radius: 999px !important; background: var(--mk-border) !important; }
.progress-bar { border-radius: 999px !important; }

/* ══════════════════════════════════════════════════════════
   EXAM RESULTS / VIEW PAGE
   ══════════════════════════════════════════════════════════ */

/* Answer review items */
.mk-review-item {
  border: 1.5px solid var(--mk-border);
  border-radius: var(--mk-radius);
  padding: 1.25rem 1.4rem;
  margin-bottom: 1rem;
  background: var(--mk-white);
}
.mk-review-item.correct { border-color: #a7f3d0; background: #f0fdf4; }
.mk-review-item.incorrect { border-color: #fecaca; background: #fef2f2; }
.mk-review-item.skipped { border-color: var(--mk-border); background: var(--mk-surface); }

.mk-review-option {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .55rem .9rem;
  border-radius: var(--mk-radius-sm);
  font-size: .875rem;
  margin-bottom: .4rem;
}
.mk-review-option.correct-ans { background: #d1fae5; color: #065f46; font-weight: 600; }
.mk-review-option.user-wrong  { background: #fee2e2; color: #991b1b; text-decoration: line-through; }
.mk-review-option.user-correct { background: #d1fae5; color: #065f46; font-weight: 600; }
.mk-review-option.neutral     { background: var(--mk-surface); color: #555; }

/* Explanation box */
.mk-explanation {
  margin-top: .9rem;
  padding: .85rem 1rem;
  background: #eff6ff;
  border-left: 4px solid #3b82f6;
  border-radius: 0 var(--mk-radius-sm) var(--mk-radius-sm) 0;
  font-size: .875rem;
  color: #1e3a5f;
  line-height: 1.6;
}
.mk-explanation strong { font-weight: 700; }

/* ══════════════════════════════════════════════════════════
   LEADERBOARD PAGE
   ══════════════════════════════════════════════════════════ */
.mk-leaderboard-wrap { max-width: 860px; margin: 0 auto; }

.mk-lb-podium {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  padding: 1.5rem 1rem 0;
}
.mk-lb-podium-item {
  text-align: center;
  flex: 0 0 160px;
}
.mk-lb-podium-item .mk-podium-rank {
  width: 56px; height: 56px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; font-weight: 800;
  margin: 0 auto .6rem;
  box-shadow: var(--mk-shadow-sm);
}
.mk-lb-podium-item:nth-child(1) .mk-podium-rank { background: #fef3c7; color: #d97706; width: 66px; height: 66px; font-size: 1.6rem; }
.mk-lb-podium-item:nth-child(2) .mk-podium-rank { background: #f1f5f9; color: #64748b; }
.mk-lb-podium-item:nth-child(3) .mk-podium-rank { background: #fef3c7; color: #b45309; }

.mk-lb-podium-item .mk-podium-name { font-weight: 700; font-size: .9rem; color: #111; }
.mk-lb-podium-item .mk-podium-score { font-size: .8rem; color: var(--mk-muted); margin-top: .2rem; }
.mk-lb-podium-item .mk-podium-bar {
  height: 8px; border-radius: 4px 4px 0 0;
  background: hsl(var(--base));
  margin-top: .75rem;
}
.mk-lb-podium-item:nth-child(1) .mk-podium-bar { height: 80px; }
.mk-lb-podium-item:nth-child(2) .mk-podium-bar { height: 56px; }
.mk-lb-podium-item:nth-child(3) .mk-podium-bar { height: 40px; }

/* Leaderboard rank rows */
.mk-lb-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .8rem 1.1rem;
  border: 1px solid var(--mk-border);
  border-radius: var(--mk-radius-sm);
  background: var(--mk-white);
  margin-bottom: .5rem;
  transition: var(--mk-transition);
}
.mk-lb-row:hover { box-shadow: var(--mk-shadow-xs); border-color: hsl(var(--base)/.3); }
.mk-lb-row.is-me { border-color: hsl(var(--base)); background: hsl(var(--base)/.04); }

.mk-lb-rank {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--mk-surface);
  border: 1.5px solid var(--mk-border);
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; font-weight: 700;
  flex-shrink: 0;
}
.mk-lb-rank.gold   { background: #fef3c7; border-color: #f59e0b; color: #92400e; }
.mk-lb-rank.silver { background: #f1f5f9; border-color: #94a3b8; color: #475569; }
.mk-lb-rank.bronze { background: #fef3c7; border-color: #b45309; color: #7c2d12; }

.mk-lb-avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  object-fit: cover;
  background: hsl(var(--base)/.15);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 700;
  color: hsl(var(--base));
  flex-shrink: 0;
}
.mk-lb-name { font-weight: 600; font-size: .9rem; color: #111; }
.mk-lb-meta { font-size: .78rem; color: var(--mk-muted); margin-top: .1rem; }
.mk-lb-score {
  margin-left: auto;
  font-size: 1.1rem; font-weight: 800;
  color: hsl(var(--base));
  min-width: 60px; text-align: right;
}
.mk-lb-score-sub { font-size: .72rem; font-weight: 500; color: var(--mk-muted); }

/* Exam filter tabs */
.mk-tabs {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.mk-tab-btn {
  padding: .45rem 1rem;
  border-radius: 999px;
  border: 1.5px solid var(--mk-border);
  background: var(--mk-white);
  font-size: .82rem;
  font-weight: 600;
  color: var(--mk-muted);
  cursor: pointer;
  transition: var(--mk-transition);
}
.mk-tab-btn:hover { border-color: hsl(var(--base)); color: hsl(var(--base)); }
.mk-tab-btn.active { background: hsl(var(--base)); border-color: hsl(var(--base)); color: #fff; }

/* ══════════════════════════════════════════════════════════
   ANALYTICS DASHBOARD
   ══════════════════════════════════════════════════════════ */
.mk-analytics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.mk-chart-card {
  background: var(--mk-white);
  border: 1px solid var(--mk-border);
  border-radius: var(--mk-radius);
  padding: 1.4rem;
  box-shadow: var(--mk-shadow-xs);
}
.mk-chart-card .mk-chart-title {
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--mk-muted);
  margin-bottom: 1rem;
}

/* Category performance bars */
.mk-perf-bar-wrap { margin-bottom: .6rem; }
.mk-perf-bar-label {
  display: flex;
  justify-content: space-between;
  font-size: .82rem;
  font-weight: 500;
  color: #333;
  margin-bottom: .3rem;
}
.mk-perf-bar-track {
  height: 10px;
  border-radius: 999px;
  background: var(--mk-border);
  overflow: hidden;
}
.mk-perf-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: hsl(var(--base));
  transition: width .8s cubic-bezier(.4,0,.2,1);
}
.mk-perf-bar-fill.danger  { background: var(--mk-danger); }
.mk-perf-bar-fill.warning { background: var(--mk-warning); }
.mk-perf-bar-fill.success { background: var(--mk-success); }

/* ══════════════════════════════════════════════════════════
   EXAM CARD (listing page)
   ══════════════════════════════════════════════════════════ */
.exam-card {
  border-radius: var(--mk-radius) !important;
  border: 1px solid var(--mk-border) !important;
  box-shadow: var(--mk-shadow-xs) !important;
  transition: var(--mk-transition);
  overflow: hidden;
  background: var(--mk-white);
}
.exam-card:hover {
  box-shadow: var(--mk-shadow-md) !important;
  transform: translateY(-2px);
  border-color: hsl(var(--base)/.4) !important;
}

/* ══════════════════════════════════════════════════════════
   BREADCRUMB
   ══════════════════════════════════════════════════════════ */
.breadcrumb-section {
  padding: .9rem 0;
  background: var(--mk-surface);
  border-bottom: 1px solid var(--mk-border);
}
.breadcrumb-item { font-size: .82rem; }
.breadcrumb-item + .breadcrumb-item::before { color: var(--mk-muted); }

/* ══════════════════════════════════════════════════════════
   PAGINATION
   ══════════════════════════════════════════════════════════ */
.pagination .page-link {
  border-radius: var(--mk-radius-sm) !important;
  border: 1.5px solid var(--mk-border) !important;
  font-size: .85rem;
  font-weight: 500;
  color: #555;
  margin: 0 2px;
  transition: var(--mk-transition);
}
.pagination .page-link:hover { border-color: hsl(var(--base)) !important; color: hsl(var(--base)) !important; }
.pagination .page-item.active .page-link { background: hsl(var(--base)) !important; border-color: hsl(var(--base)) !important; color: #fff !important; }

/* ══════════════════════════════════════════════════════════
   SCROLLBAR
   ══════════════════════════════════════════════════════════ */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #d1d5db; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #9ca3af; }

/* ══════════════════════════════════════════════════════════
   UTILITY CLASSES
   ══════════════════════════════════════════════════════════ */
.mk-section-title { font-size: 1.5rem; font-weight: 700; color: #111; }
.mk-section-sub   { font-size: .9rem; color: var(--mk-muted); margin-top: .25rem; }
.mk-divider       { height: 1px; background: var(--mk-border); margin: 1.5rem 0; }
.mk-empty-state   { text-align: center; padding: 3rem 1rem; color: var(--mk-muted); }
.mk-empty-state i { font-size: 2.5rem; opacity: .3; display: block; margin-bottom: .75rem; }

/* responsive */
@media (max-width: 768px) {
  .mk-lb-podium { gap: .75rem; }
  .mk-lb-podium-item { flex: 0 0 100px; }
  .mk-analytics-grid { grid-template-columns: 1fr; }
  .exam-qsn { padding: 1rem; }
}