/* ═══════════════════════════════════════════════════════════════════════════
   CERTPREP — STYLES
   Modern dark theme for Microsoft certification practice exams
═══════════════════════════════════════════════════════════════════════════ */

/* ── Variables ──────────────────────────────────────────────────────────── */
:root {
  --bg:           #080b14;
  --bg-2:         #0d1120;
  --bg-card:      #111827;
  --bg-card-hover:#161e30;
  --border:       rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.18);

  --blue:         #0078D4;
  --blue-light:   #1a8fe0;
  --cyan:         #00b4d8;
  --green:        #22c55e;
  --red:          #ef4444;
  --yellow:       #f59e0b;
  --purple:       #7C3AED;

  --text:         #f0f2f8;
  --text-2:       #9aa3b8;
  --text-3:       #5e6880;

  --radius-sm:    8px;
  --radius:       12px;
  --radius-lg:    18px;
  --radius-xl:    24px;

  --shadow:       0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg:    0 8px 48px rgba(0,0,0,0.6);

  --transition:   all 0.2s cubic-bezier(0.4, 0, 0.2, 1);

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* ── Reset ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }
input { font-family: var(--font); }
img, svg { display: block; }

/* ── Layout helpers ─────────────────────────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.view { min-height: 100vh; }
.view.active { display: block; }

/* ═══════════════════════════════════════════════════════════════════════════
   HEADER
═══════════════════════════════════════════════════════════════════════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8,11,20,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-icon { display: flex; align-items: center; }
.logo-text {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.4px;
  color: var(--text);
}
.nav-badge {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-3);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 99px;
}

/* ═══════════════════════════════════════════════════════════════════════════
   HERO
═══════════════════════════════════════════════════════════════════════════ */
.hero {
  padding: 72px 24px 48px;
  text-align: center;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(0,120,212,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 80% 50%, rgba(124,58,237,0.06) 0%, transparent 60%);
}
.hero-content { max-width: 720px; margin: 0 auto; }
.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(0,180,216,0.1);
  border: 1px solid rgba(0,180,216,0.2);
  padding: 5px 14px;
  border-radius: 99px;
  margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  color: var(--text);
  margin-bottom: 16px;
}
.hero-accent {
  background: linear-gradient(135deg, #0078D4 0%, #00b4d8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 36px;
}

/* Search bar */
.search-wrapper { max-width: 560px; margin: 0 auto; }
.search-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 0 16px;
  height: 54px;
  transition: var(--transition);
}
.search-box:focus-within {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(0,120,212,0.15);
}
.search-icon { color: var(--text-3); flex-shrink: 0; }
.search-input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 0.95rem;
}
.search-input::placeholder { color: var(--text-3); }
.search-clear {
  color: var(--text-3);
  padding: 4px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  transition: var(--transition);
}
.search-clear:hover { color: var(--text); background: rgba(255,255,255,0.08); }

/* ═══════════════════════════════════════════════════════════════════════════
   FILTERS
═══════════════════════════════════════════════════════════════════════════ */
.filters-section {
  padding: 20px 0 0;
  border-bottom: 1px solid var(--border);
  background: rgba(255,255,255,0.01);
}
.filters-section .container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-bottom: 16px;
}
.filter-tabs {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.filter-tab {
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  background: transparent;
  transition: var(--transition);
  border: 1px solid transparent;
}
.filter-tab:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.filter-tab.active {
  color: var(--blue);
  background: rgba(0,120,212,0.1);
  border-color: rgba(0,120,212,0.25);
}
.level-filters {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.level-pill {
  padding: 4px 12px;
  border-radius: 99px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-3);
  background: transparent;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.level-pill:hover { color: var(--text-2); border-color: var(--border-hover); }
.level-pill.active {
  color: var(--text);
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.15);
}

/* ═══════════════════════════════════════════════════════════════════════════
   CERT GRID + CARDS
═══════════════════════════════════════════════════════════════════════════ */
.results-info {
  padding: 24px 0 16px;
  font-size: 0.85rem;
  color: var(--text-3);
}
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  padding-bottom: 64px;
}

/* Card */
.cert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.cert-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--card-gradient, linear-gradient(90deg, #0078D4, #00b4d8));
  opacity: 0.7;
  transition: opacity 0.2s;
}
.cert-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.cert-card:hover::before { opacity: 1; }
.cert-card:active { transform: translateY(0); }

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
}
.card-id-badge {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--card-color-alpha, rgba(0,120,212,0.15));
  color: var(--card-color, #0078D4);
  flex-shrink: 0;
}
.card-level-badge {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-3);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 99px;
  white-space: nowrap;
}
.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}
.card-description {
  font-size: 0.83rem;
  color: var(--text-2);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.card-category {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--card-color, #0078D4);
  display: flex;
  align-items: center;
  gap: 5px;
}
.card-arrow {
  color: var(--text-3);
  transition: var(--transition);
  display: flex;
  align-items: center;
}
.cert-card:hover .card-arrow {
  color: var(--card-color, #0078D4);
  transform: translateX(3px);
}

/* No results */
.no-results {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-2);
}
.no-results-icon { font-size: 3rem; margin-bottom: 16px; }
.no-results h3 { font-size: 1.2rem; margin-bottom: 8px; color: var(--text); }
.no-results p { font-size: 0.9rem; margin-bottom: 20px; }
.btn-secondary {
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  border: 1px solid var(--border);
  background: transparent;
  transition: var(--transition);
}
.btn-secondary:hover { color: var(--text); border-color: var(--border-hover); }

/* ═══════════════════════════════════════════════════════════════════════════
   MODAL
═══════════════════════════════════════════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeIn 0.18s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  animation: slideUp 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: var(--shadow-lg);
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0)     scale(1);    }
}
.modal-card::-webkit-scrollbar { width: 6px; }
.modal-card::-webkit-scrollbar-track { background: transparent; }
.modal-card::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }

.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  z-index: 10;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  color: var(--text-2);
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.modal-close:hover { background: rgba(255,255,255,0.12); color: var(--text); }

.modal-header {
  padding: 28px 28px 0;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  position: relative;
  overflow: hidden;
}
.modal-header::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--modal-gradient, linear-gradient(135deg, rgba(0,120,212,0.1) 0%, transparent 60%));
  pointer-events: none;
}
.modal-badge-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.modal-cert-id {
  font-size: 0.9rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  background: rgba(0,120,212,0.15);
  color: #4db8ff;
}
.modal-level-badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-3);
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 99px;
}
.modal-title {
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 10px;
  color: var(--text);
  padding-right: 32px;
}
.modal-description {
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.65;
  padding-bottom: 24px;
}
.modal-body { padding: 0 28px 28px; }

/* Modal meta chips */
.modal-meta-row {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.meta-chip {
  flex: 1;
  min-width: 100px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.meta-label { font-size: 0.72rem; font-weight: 500; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.05em; }
.meta-value { font-size: 0.95rem; font-weight: 600; color: var(--text); }

/* Skills */
.modal-skills { margin-bottom: 24px; }
.modal-section-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.skills-list { display: flex; flex-direction: column; gap: 8px; }
.skill-item {}
.skill-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
}
.skill-name { font-size: 0.84rem; color: var(--text-2); font-weight: 500; }
.skill-weight { font-size: 0.78rem; font-weight: 600; color: var(--text-3); }
.skill-bar {
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
}
.skill-bar-fill {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
}

/* Question count selector */
.modal-question-select { margin-bottom: 24px; }
.question-count-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}
.q-count-btn {
  padding: 12px 6px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--bg-2);
  color: var(--text-2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  transition: var(--transition);
}
.q-count-btn:hover {
  border-color: var(--blue);
  color: var(--text);
  background: rgba(0,120,212,0.08);
}
.q-count-btn.selected {
  border-color: var(--blue);
  background: rgba(0,120,212,0.15);
  color: var(--blue-light);
}
.q-count-num { font-size: 1.1rem; font-weight: 700; }
.q-count-label { font-size: 0.7rem; color: inherit; opacity: 0.7; }

/* Modal actions */
.modal-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.modal-learn-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-3);
  transition: var(--transition);
  padding: 8px 0;
}
.modal-learn-link:hover { color: var(--blue-light); }
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: var(--blue);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  border: none;
}
.btn-primary:hover { background: var(--blue-light); box-shadow: 0 4px 16px rgba(0,120,212,0.35); }
.btn-start { padding: 12px 24px; }

/* ═══════════════════════════════════════════════════════════════════════════
   LOADING SCREEN
═══════════════════════════════════════════════════════════════════════════ */
.loading-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  background-image: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(0,120,212,0.08) 0%, transparent 70%);
}
.loading-inner { text-align: center; max-width: 400px; padding: 24px; }

.loading-orb {
  width: 80px; height: 80px;
  margin: 0 auto 32px;
  position: relative;
  display: flex; align-items: center; justify-content: center;
}
.orb-ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid transparent;
  animation: spin 3s linear infinite;
}
.ring-1 {
  width: 80px; height: 80px;
  border-top-color: var(--blue);
  animation-duration: 2.5s;
}
.ring-2 {
  width: 62px; height: 62px;
  border-right-color: var(--cyan);
  animation-duration: 1.8s;
  animation-direction: reverse;
}
.ring-3 {
  width: 44px; height: 44px;
  border-bottom-color: var(--purple);
  animation-duration: 3.2s;
}
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

.orb-core {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--bg-card);
  display: flex; align-items: center; justify-content: center;
  z-index: 1;
}
.loading-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}
.loading-subtitle {
  font-size: 0.9rem;
  color: var(--text-2);
  line-height: 1.6;
  margin-bottom: 32px;
}
.loading-steps { text-align: left; display: flex; flex-direction: column; gap: 12px; }
.loading-step {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.875rem;
  color: var(--text-3);
  transition: var(--transition);
}
.loading-step.active { color: var(--text); }
.loading-step.done { color: var(--green); }
.step-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-3);
  flex-shrink: 0;
  transition: var(--transition);
}
.loading-step.active .step-dot {
  background: var(--blue);
  box-shadow: 0 0 8px rgba(0,120,212,0.6);
  animation: pulse 1s ease-in-out infinite;
}
.loading-step.done .step-dot { background: var(--green); }
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%       { transform: scale(1.4); opacity: 0.7; }
}

/* ═══════════════════════════════════════════════════════════════════════════
   EXAM VIEW
═══════════════════════════════════════════════════════════════════════════ */
.exam-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

/* Exam header */
.exam-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8,11,20,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.exam-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.exam-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  transition: var(--transition);
  white-space: nowrap;
}
.exam-back-btn:hover { color: var(--text); border-color: var(--border-hover); }
.exam-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-2);
}
.exam-cert-id { font-weight: 700; color: var(--blue-light); }
.exam-divider { color: var(--text-3); }
.exam-progress-text { font-weight: 500; }
.exam-submit-btn {
  padding: 8px 18px;
  background: rgba(239,68,68,0.12);
  border: 1px solid rgba(239,68,68,0.3);
  color: #f87171;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}
.exam-submit-btn:hover { background: rgba(239,68,68,0.2); border-color: rgba(239,68,68,0.5); }

.exam-progress-bar {
  height: 3px;
  background: rgba(255,255,255,0.05);
}
.exam-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  transition: width 0.4s ease;
  border-radius: 0 2px 2px 0;
}

/* Exam body */
.exam-body {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  padding: 32px 24px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  align-items: start;
}

/* Sidebar */
.exam-sidebar {
  position: sticky;
  top: 80px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
}
.sidebar-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.question-map {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 5px;
  margin-bottom: 14px;
}
.map-btn {
  aspect-ratio: 1;
  border-radius: 5px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-3);
  background: rgba(255,255,255,0.04);
  border: 1px solid transparent;
  transition: var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.map-btn:hover { background: rgba(255,255,255,0.08); color: var(--text-2); }
.map-btn.current {
  border-color: var(--blue);
  background: rgba(0,120,212,0.2);
  color: var(--blue-light);
}
.map-btn.answered {
  background: rgba(34,197,94,0.12);
  color: var(--green);
  border-color: rgba(34,197,94,0.2);
}
.map-btn.flagged {
  background: rgba(245,158,11,0.12);
  color: var(--yellow);
  border-color: rgba(245,158,11,0.2);
}
.map-btn.answered.flagged {
  background: rgba(245,158,11,0.12);
  color: var(--yellow);
  border-color: rgba(245,158,11,0.3);
}
.sidebar-legend { display: flex; flex-direction: column; gap: 6px; }
.legend-item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.74rem;
  color: var(--text-3);
}
.legend-dot {
  width: 8px; height: 8px;
  border-radius: 2px;
  flex-shrink: 0;
}
.legend-dot.answered { background: var(--green); opacity: 0.7; }
.legend-dot.flagged   { background: var(--yellow); opacity: 0.7; }
.legend-dot.current   { background: var(--blue); }

/* Question card */
.exam-main { display: flex; flex-direction: column; gap: 16px; }
.question-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
}
.question-top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.question-domain {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--blue-light);
  background: rgba(0,120,212,0.1);
  border: 1px solid rgba(0,120,212,0.2);
  padding: 4px 10px;
  border-radius: 99px;
}
.flag-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-3);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  transition: var(--transition);
}
.flag-btn:hover { color: var(--yellow); border-color: rgba(245,158,11,0.3); }
.flag-btn.active {
  color: var(--yellow);
  background: rgba(245,158,11,0.1);
  border-color: rgba(245,158,11,0.3);
}
.question-number {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-3);
  margin-bottom: 4px;
}
.question-type-badge {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-bottom: 14px;
  font-style: italic;
}
.question-text {
  font-size: 1rem;
  color: var(--text);
  line-height: 1.7;
  font-weight: 500;
}
.options-list { margin-top: 20px; display: flex; flex-direction: column; gap: 10px; }

.option-btn {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--bg-2);
  color: var(--text-2);
  text-align: left;
  font-size: 0.9rem;
  line-height: 1.5;
  transition: var(--transition);
  width: 100%;
  cursor: pointer;
}
.option-btn:hover {
  border-color: var(--blue);
  background: rgba(0,120,212,0.06);
  color: var(--text);
}
.option-btn.selected {
  border-color: var(--blue);
  background: rgba(0,120,212,0.12);
  color: var(--text);
}
.option-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  min-width: 26px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  background: rgba(255,255,255,0.06);
  color: var(--text-3);
  transition: var(--transition);
}
.option-btn:hover .option-key,
.option-btn.selected .option-key {
  background: rgba(0,120,212,0.25);
  color: var(--blue-light);
}
.option-text { flex: 1; }

/* Nav buttons */
.exam-nav-btns {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}
.exam-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-2);
  border: 1px solid var(--border);
  background: transparent;
  transition: var(--transition);
}
.exam-nav-btn:hover { color: var(--text); border-color: var(--border-hover); }
.exam-nav-btn.primary {
  background: var(--blue);
  color: #fff;
  border-color: transparent;
}
.exam-nav-btn.primary:hover { background: var(--blue-light); }
.exam-nav-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.exam-nav-btn:disabled:hover { color: var(--text-2); border-color: var(--border); background: transparent; }

/* ═══════════════════════════════════════════════════════════════════════════
   RESULTS VIEW
═══════════════════════════════════════════════════════════════════════════ */
.results-layout { min-height: 100vh; background: var(--bg); }

.results-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8,11,20,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 58px;
  gap: 16px;
}
.results-cert-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-2);
}

/* Score section */
.score-section {
  padding: 40px 24px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: start;
}
.score-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

/* Gauge */
.score-gauge-wrapper {
  position: relative;
  width: 160px;
  height: 160px;
  flex-shrink: 0;
}
.score-gauge { overflow: visible; }
.gauge-track { stroke: rgba(255,255,255,0.06); }
.gauge-fill {
  stroke: var(--blue);
  stroke-linecap: round;
  transition: stroke-dashoffset 1.2s cubic-bezier(0.4, 0, 0.2, 1),
              stroke 0.5s ease;
}
.score-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.score-percent { font-size: 1.9rem; font-weight: 800; color: var(--text); line-height: 1; }
.score-scaled { font-size: 0.75rem; color: var(--text-3); margin-top: 4px; }

.score-details {}
.score-verdict {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.score-verdict.pass { color: var(--green); }
.score-verdict.fail { color: var(--red); }
.score-stats { display: flex; gap: 24px; flex-wrap: wrap; }
.score-stat { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.stat-num { font-size: 1.8rem; font-weight: 800; }
.stat-num.correct { color: var(--green); }
.stat-num.wrong { color: var(--red); }
.stat-num.unanswered { color: var(--text-3); }
.stat-label { font-size: 0.78rem; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.05em; font-weight: 500; }

/* Domain breakdown */
.domain-breakdown {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}
.breakdown-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.domain-bars { display: flex; flex-direction: column; gap: 14px; }
.domain-bar-item {}
.domain-bar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}
.domain-bar-name { font-size: 0.84rem; color: var(--text-2); font-weight: 500; }
.domain-bar-pct { font-size: 0.84rem; font-weight: 600; color: var(--text); }
.domain-bar-track {
  height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: 3px;
  overflow: hidden;
}
.domain-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.domain-bar-fill.good { background: linear-gradient(90deg, var(--green), #4ade80); }
.domain-bar-fill.ok   { background: linear-gradient(90deg, var(--yellow), #fcd34d); }
.domain-bar-fill.poor { background: linear-gradient(90deg, var(--red), #f87171); }

/* Review section */
.review-section {
  padding: 0 24px 64px;
}
.review-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.review-title { font-size: 1.1rem; font-weight: 700; color: var(--text); }
.review-filter-btns { display: flex; gap: 6px; }
.review-filter {
  padding: 6px 14px;
  border-radius: 99px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-3);
  border: 1px solid var(--border);
  background: transparent;
  transition: var(--transition);
}
.review-filter:hover { color: var(--text-2); border-color: var(--border-hover); }
.review-filter.active {
  color: var(--text);
  background: rgba(255,255,255,0.06);
  border-color: var(--border-hover);
}
.review-list { display: flex; flex-direction: column; gap: 12px; }

.review-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.review-item.correct { border-left: 3px solid var(--green); }
.review-item.wrong   { border-left: 3px solid var(--red); }
.review-item.skipped { border-left: 3px solid var(--text-3); }

.review-item-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  user-select: none;
}
.review-status-icon {
  width: 24px; height: 24px; min-width: 24px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  margin-top: 2px;
}
.review-status-icon.correct { background: rgba(34,197,94,0.15); color: var(--green); }
.review-status-icon.wrong   { background: rgba(239,68,68,0.15); color: var(--red); }
.review-status-icon.skipped { background: rgba(255,255,255,0.05); color: var(--text-3); }

.review-q-content { flex: 1; }
.review-q-meta {
  display: flex;
  gap: 8px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}
.review-q-num { font-size: 0.75rem; font-weight: 600; color: var(--text-3); }
.review-q-domain {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--blue-light);
  background: rgba(0,120,212,0.1);
  padding: 1px 7px;
  border-radius: 99px;
}
.review-q-text { font-size: 0.9rem; color: var(--text); line-height: 1.5; font-weight: 500; }
.review-expand-btn {
  color: var(--text-3);
  padding: 4px;
  transition: transform 0.2s;
  flex-shrink: 0;
  display: flex;
  align-items: center;
}
.review-item.open .review-expand-btn { transform: rotate(180deg); }

.review-item-body {
  display: none;
  padding: 0 20px 16px;
  border-top: 1px solid var(--border);
}
.review-item.open .review-item-body { display: block; }
.review-answer-row {
  display: flex;
  gap: 16px;
  padding: 12px 0;
  flex-wrap: wrap;
}
.answer-col { flex: 1; min-width: 180px; }
.answer-col-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}
.answer-col-value { font-size: 0.875rem; font-weight: 500; }
.answer-col-value.correct { color: var(--green); }
.answer-col-value.wrong   { color: var(--red); }
.answer-col-value.neutral { color: var(--text-2); }
.review-explanation {
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.65;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-top: 8px;
  border: 1px solid var(--border);
}
.review-learn-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--blue-light);
  margin-top: 10px;
  transition: var(--transition);
}
.review-learn-link:hover { color: var(--cyan); }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-3);
}
.site-footer a { color: var(--blue-light); }
.site-footer a:hover { text-decoration: underline; }

/* ═══════════════════════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .exam-body {
    grid-template-columns: 1fr;
  }
  .exam-sidebar {
    position: static;
    order: 2;
  }
  .exam-main { order: 1; }
  .question-map { grid-template-columns: repeat(8, 1fr); }

  .score-section {
    grid-template-columns: 1fr;
  }
  .score-card { justify-content: center; }
}
@media (max-width: 640px) {
  .hero { padding: 48px 16px 32px; }
  .hero-title { font-size: 2rem; }
  .question-count-grid { grid-template-columns: repeat(3, 1fr); }
  .modal-actions { flex-direction: column-reverse; }
  .btn-start { width: 100%; justify-content: center; }
  .exam-header-inner { padding: 0 16px; }
  .exam-body { padding: 20px 16px; }
  .review-section { padding: 0 16px 40px; }
  .score-section { padding: 24px 16px; }
}