/* ============================================
   Onboarding Overlay
   ============================================ */

:root { --z-onboarding: 10100; }

@keyframes ob-backdrop-in {
  from { opacity: 0 }
  to   { opacity: 1 }
}
@keyframes ob-backdrop-out {
  from { opacity: 1 }
  to   { opacity: 0 }
}
@keyframes ob-card-in {
  from { opacity: 0; transform: translateY(24px) scale(0.97) }
  to   { opacity: 1; transform: translateY(0) scale(1) }
}
@keyframes ob-illus-in {
  from { opacity: 0; transform: scale(0.88) translateY(10px) }
  to   { opacity: 1; transform: scale(1) translateY(0) }
}
@keyframes ob-orbit-spin {
  from { transform: rotate(0deg) }
  to   { transform: rotate(360deg) }
}

.ob-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  animation: ob-backdrop-in 0.3s ease forwards;
  z-index: var(--z-onboarding);
  isolation: isolate;
}
.ob-overlay--closing {
  animation: ob-backdrop-out 0.3s ease forwards;
}
.ob-overlay--closing .ob-card {
  opacity: 0;
  transform: translateY(16px) scale(0.97);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.ob-card {
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.28), 0 4px 16px rgba(0, 0, 0, 0.12);
  width: 100%;
  max-width: 540px;
  padding: 1.75rem 1.75rem 1.5rem;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  animation: ob-card-in 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  overflow: hidden;
  /* Establish stacking context so z-index on ob-overlay propagates correctly */
  isolation: isolate;
}

.ob-skip {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--gray-400);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
  z-index: 2;
}
.ob-skip:hover { color: var(--gray-600); }

/* Slide wrap transitions */
.ob-slide-wrap {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.ob-exit-left  { animation: ob-exit-l  0.2s ease forwards; }
.ob-exit-right { animation: ob-exit-r  0.2s ease forwards; }
.ob-enter-right { animation: ob-enter-r 0.3s ease forwards; }
.ob-enter-left  { animation: ob-enter-l 0.3s ease forwards; }

@keyframes ob-exit-l {
  to { opacity: 0; transform: translateX(-32px); }
}
@keyframes ob-exit-r {
  to { opacity: 0; transform: translateX(32px); }
}
@keyframes ob-enter-r {
  from { opacity: 0; transform: translateX(32px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes ob-enter-l {
  from { opacity: 0; transform: translateX(-32px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* Illustration area */
.ob-illus {
  height: 180px;
  border-radius: var(--radius-lg);
  background: var(--gray-50);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
  transition: background var(--transition-base);
}
.ob-illus--dark {
  background: #1a2332;
}
.ob-illus-wrap {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ob-illus-animate {
  animation: ob-illus-in 0.35s cubic-bezier(0.34, 1.2, 0.64, 1) forwards;
}

/* Text content */
.ob-content { text-align: center; }
.ob-title {
  font-family: var(--font-family-heading);
  font-size: 1.15rem;
  font-weight: var(--font-weight-bold);
  color: var(--secondary-color);
  margin: 0 0 0.4rem;
  line-height: var(--line-height-tight);
  /* Reserve space so text doesn't collide with the Skip button */
  padding-right: 2.25rem;
}
.ob-body {
  font-size: 0.9rem;
  color: var(--gray-500);
  margin: 0;
  line-height: var(--line-height-relaxed);
}

/* Dot navigation */
.ob-dots {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 6px;
}
.ob-dot {
  height: 8px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  padding: 0;
  background: var(--gray-300);
  width: 8px;
  transition: width 0.3s ease, background 0.3s ease;
  min-width: 8px;
}
.ob-dot--active {
  width: 24px;
  background: var(--primary-color);
}

/* Bottom navigation */
.ob-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}
.ob-nav .btn {
  min-width: 88px;
  min-height: var(--touch-target-min);
}

/* ---- Slide 1: Welcome / Orbit ---- */
.ob-illus-welcome {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  width: 100%;
  height: 100%;
}
.ob-orbit-ring {
  position: relative;
  width: 136px;
  height: 136px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ob-orbit-center {
  width: 48px;
  height: 48px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  box-shadow: 0 0 0 8px rgba(255,153,0,0.12), 0 0 0 16px rgba(255,153,0,0.06);
}
.ob-orbit-logo {
  font-weight: 800;
  font-size: 0.9rem;
  color: #fff;
  letter-spacing: -0.03em;
}
.ob-orbit-vendors {
  position: absolute;
  inset: 0;
  animation: ob-orbit-spin 20s linear infinite;
}
.ob-vendor-dot {
  position: absolute;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color, #ccc);
  color: #fff;
  font-size: 0.52rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  /* Counter-rotate to keep text upright while .ob-orbit-vendors spins.
     Absolute top/left positioning (see .ob-vd-* rules below) avoids the
     calc(-1*var(--angle)) approach which is unreliable across browsers. */
  animation: ob-dot-counter-spin 20s linear infinite;
}

@keyframes ob-dot-counter-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(-360deg); }
}

/* 6 dots placed at 60° intervals on a 52px-radius orbit.
   Container = 136px, center = 68px, dot half-size = 16px.
   Formula: top = 68 + 52*sin(angle) - 16, left = 68 + 52*cos(angle) - 16
   Angles: 270°(top), 330°, 30°, 90°(bottom), 150°, 210°
   — starting at the top and going clockwise for a natural appearance.
   Simplified pairs (top, left):
     270° (top)    sin=-1,  cos=0   → top=0px,   left=52px
     330°          sin=-0.5,cos=0.87→ top=26px,  left=97px
     30°           sin=0.5, cos=0.87→ top=78px,  left=97px
     90° (bottom)  sin=1,   cos=0   → top=104px, left=52px
     150°          sin=0.5, cos=-0.87→top=78px,  left=7px
     210°          sin=-0.5,cos=-0.87→top=26px,  left=7px  */
.ob-vd-0 { top:   0px; left:  52px; }
.ob-vd-1 { top:  26px; left:  97px; }
.ob-vd-2 { top:  78px; left:  97px; }
.ob-vd-3 { top: 104px; left:  52px; }
.ob-vd-4 { top:  78px; left:   7px; }
.ob-vd-5 { top:  26px; left:   7px; }

.ob-welcome-stats {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  color: var(--gray-500);
  font-weight: 500;
}
.ob-stat-divider { color: var(--gray-300); }

/* ---- Slide 2: Free Practice ---- */
.ob-illus-free {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.ob-quiz-card-mock {
  background: #fff;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.9rem 1rem;
  width: 220px;
  position: relative;
  box-shadow: 0 4px 16px rgba(0,0,0,0.07);
}
.ob-qcm-lock {
  position: absolute;
  top: 0.7rem;
  right: 0.75rem;
}
.ob-qcm-q { margin-bottom: 0.6rem; }
.ob-shimmer {
  background: var(--gray-200);
  border-radius: var(--radius-sm);
  height: 8px;
  margin-bottom: 5px;
}
.ob-shimmer-lg { width: 90%; }
.ob-shimmer-md { width: 75%; }
.ob-shimmer-sm { width: 55%; }
.ob-shimmer-opt { flex: 1; height: 7px; margin: 0; }
.ob-shimmer-green { background: rgba(40,167,69,0.2) !important; }
.ob-qcm-options { display: flex; flex-direction: column; gap: 5px; }
.ob-qcm-opt {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 6px;
  border-radius: 4px;
  border: 1px solid var(--gray-200);
}
.ob-qcm-opt--correct {
  border-color: rgba(40,167,69,0.4);
  background: rgba(40,167,69,0.06);
}
.ob-opt-label {
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--gray-400);
  min-width: 10px;
}
.ob-opt-label--correct { color: #28a745; }
.ob-check { flex-shrink: 0; }
.ob-free-badge {
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(40,167,69,0.1);
  color: #28a745;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

/* ---- Slide 3: Quiz Interface ---- */
.ob-illus-quiz {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  padding: 0.5rem;
}
.ob-page-tabs {
  display: flex;
  gap: 5px;
}
.ob-page-tab {
  width: 36px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-size: 0.65rem;
  font-weight: 600;
}
.ob-page-tab--done { background: #3b82f6; color: #fff; }
.ob-page-tab--active { background: #1d4ed8; color: #fff; outline: 2px solid #93c5fd; }
.ob-page-tab--pending { background: var(--gray-100); color: var(--gray-400); border: 1px solid var(--gray-200); }
.ob-quiz-card-mini {
  background: #fff;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.75rem 0.9rem;
  width: 220px;
  position: relative;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}
.ob-qcm-bk {
  position: absolute;
  top: 0.5rem;
  right: 0.75rem;
}
.ob-qicon {
  display: flex;
  justify-content: center;
  margin-bottom: 0.5rem;
}
.ob-qlines { margin-bottom: 0.5rem; }
.ob-shimmer-q1 { width: 80%; height: 7px; }
.ob-shimmer-q2 { width: 60%; height: 7px; }
.ob-progress-bar-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 0.4rem;
}
.ob-progress-bar {
  flex: 1;
  height: 5px;
  background: var(--gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.ob-progress-fill {
  height: 100%;
  background: #3b82f6;
  border-radius: var(--radius-full);
}
.ob-progress-label { font-size: 0.6rem; color: var(--gray-400); white-space: nowrap; }
.ob-quiz-hint {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.68rem;
  color: var(--gray-400);
}

/* ---- Slide 4: Exam Mode (Dark) ---- */
.ob-illus-exam {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  padding: 0.75rem 1.25rem;
  width: 100%;
}
.ob-exam-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  position: relative;
}
.ob-timer-svg { display: block; }
.ob-timer-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
  margin-top: -4px;
}
.ob-timer-val {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  line-height: 1;
}
.ob-timer-lbl {
  display: block;
  font-size: 0.52rem;
  color: #9ca3af;
  margin-top: 2px;
}
.ob-exam-divider {
  width: 1px;
  height: 100px;
  background: rgba(255,255,255,0.1);
  flex-shrink: 0;
}
.ob-exam-right {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.ob-nav-label {
  font-size: 0.6rem;
  color: #9ca3af;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.ob-nav-grid {
  display: grid;
  grid-template-columns: repeat(5, 18px);
  gap: 4px;
}
.ob-nav-cell {
  width: 18px;
  height: 18px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.ob-nav-cell--answered  { background: var(--primary-color); }
.ob-nav-cell--unanswered { background: #374151; }
.ob-nav-cell--current   { background: #3b82f6; outline: 2px solid #93c5fd; }
.ob-nav-cell--bookmark  { background: #1d4ed8; }
.ob-nav-legend {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.ob-nav-legend span {
  display: flex;
  align-items: center;
  gap: 3px;
  font-size: 0.55rem;
  color: #9ca3af;
}
.ob-leg-dot {
  width: 7px;
  height: 7px;
  border-radius: 2px;
  display: inline-block;
}
.ob-leg-answered  { background: var(--primary-color); }
.ob-leg-unanswered { background: #374151; border: 1px solid #4b5563; }
.ob-leg-bookmark  { background: #1d4ed8; }

/* ---- Slide 5: Pricing ---- */
.ob-illus-pricing {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem;
}
.ob-crown { line-height: 1; }
.ob-price-cards {
  display: flex;
  gap: 0.75rem;
}
.ob-price-card {
  background: #fff;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.75rem;
  width: 108px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.ob-price-card--featured {
  border-color: #f59e0b;
  box-shadow: 0 4px 16px rgba(245,158,11,0.2);
}
.ob-pc-badge {
  position: absolute;
  top: 7px;
  right: -14px;
  background: #f59e0b;
  color: #fff;
  font-size: 0.5rem;
  font-weight: 700;
  padding: 2px 18px 2px 6px;
  transform: rotate(30deg);
  transform-origin: right top;
}
.ob-pc-icon { margin-bottom: 5px; display: flex; justify-content: center; }
.ob-pc-duration { font-size: 0.85rem; font-weight: 700; color: var(--secondary-color); }
.ob-pc-access { font-size: 0.58rem; color: var(--gray-400); margin-bottom: 5px; }
.ob-pc-checks { font-size: 0.58rem; color: var(--gray-500); text-align: left; display: flex; flex-direction: column; gap: 2px; }
.ob-session-pill {
  display: flex;
  align-items: center;
  gap: 5px;
  background: var(--gray-100);
  color: var(--gray-500);
  font-size: 0.68rem;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

/* ---- Slide 6: Certificate ---- */
.ob-illus-cert {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem;
}
.ob-cert-card {
  width: 230px;
  border: 2px solid #dee2e6;
  border-radius: var(--radius-md);
  padding: 2px;
  background: #fffbf5;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  position: relative;
  overflow: hidden;
}
.ob-cert-bg-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 6px,
    #ff9900 6px,
    #ff9900 7px
  );
  pointer-events: none;
}
.ob-cert-inner {
  border: 1.5px solid #ff9900;
  border-radius: 3px;
  padding: 0.65rem 0.75rem 0.5rem;
  position: relative;
}
.ob-cert-medal { text-align: center; margin-bottom: 0.3rem; }
.ob-cert-lines { text-align: center; }
.ob-cert-line { line-height: 1.4; }
.ob-cert-title-line { font-size: 0.72rem; font-weight: 700; color: var(--secondary-color); }
.ob-cert-sub { font-size: 0.56rem; color: var(--gray-400); }
.ob-cert-name { font-size: 0.68rem; font-weight: 600; color: var(--primary-color); }
.ob-cert-exam { font-size: 0.62rem; font-weight: 600; color: var(--secondary-color); }
.ob-cert-divider { border: none; border-top: 1px solid #e9ecef; margin: 0.4rem 0 0.3rem; }
.ob-cert-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.ob-cert-date { font-size: 0.54rem; color: var(--gray-400); }
.ob-cert-pdf svg { display: block; }
.ob-cert-actions {
  display: flex;
  gap: 0.5rem;
}
.ob-cert-action-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.66rem;
  color: var(--gray-500);
  background: var(--gray-100);
  border-radius: var(--radius-full);
  padding: 4px 10px;
  cursor: default;
}

/* ---- Responsive ---- */
@media (max-width: 540px) {
  .ob-overlay { padding: 0; align-items: flex-end; }
  .ob-card {
    border-radius: 20px 20px 0 0;
    max-width: 100%;
    padding: 1.5rem 1.25rem 1.25rem;
    animation: ob-card-mobile-in 0.4s cubic-bezier(0.34, 1.2, 0.64, 1) forwards;
  }
  @keyframes ob-card-mobile-in {
    from { opacity: 0; transform: translateY(60px) }
    to   { opacity: 1; transform: translateY(0) }
  }
  .ob-illus { height: 160px; }
  .ob-title { font-size: 1.05rem; }
  .ob-quiz-card-mock,
  .ob-quiz-card-mini,
  .ob-cert-card { width: 190px; }
  .ob-price-cards { gap: 0.5rem; }
  .ob-price-card { width: 90px; font-size: 0.85em; }
  .ob-illus-exam { gap: 0.75rem; padding: 0.5rem 0.75rem; }
  .ob-nav-grid { grid-template-columns: repeat(5, 15px); }
  .ob-nav-cell { width: 15px; height: 15px; }
  .ob-cert-action-btn { font-size: 0.58rem; padding: 3px 7px; }
  .ob-nav .btn { min-width: 72px; font-size: 0.85rem; }
}

@media (prefers-reduced-motion: reduce) {
  .ob-overlay,
  .ob-card,
  .ob-illus-wrap,
  .ob-illus-animate,
  .ob-exit-left,
  .ob-exit-right,
  .ob-enter-right,
  .ob-enter-left,
  .ob-orbit-vendors,
  .ob-vendor-dot {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}