/* ============================================================
   SAMA CFMD Fraud Academy — Design Tokens & Base Styles
   ============================================================ */

:root {
  /* Color tokens */
  --color-bg-primary:     #0A0E1A;
  --color-bg-secondary:   #111827;
  --color-bg-card:        #1A2236;
  --color-accent-gold:    #C8A84B;
  --color-accent-green:   #22C55E;
  --color-accent-red:     #EF4444;
  --color-accent-blue:    #3B82F6;
  --color-text-primary:   #F9FAFB;
  --color-text-secondary: #9CA3AF;
  --color-text-muted:     #6B7280;
  --color-border:         #2D3748;

  /* Spacing scale */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  32px;
  --space-2xl: 48px;

  /* Border radius */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --radius-pill: 999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ============================================================
   Reset & Base
   ============================================================ */

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

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, svg {
  max-width: 100%;
  display: block;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
}

input, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* ============================================================
   Typography helpers
   ============================================================ */

.text-primary   { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted     { color: var(--color-text-muted); }
.text-gold      { color: var(--color-accent-gold); }
.text-green     { color: var(--color-accent-green); }
.text-red       { color: var(--color-accent-red); }
.text-blue      { color: var(--color-accent-blue); }

.text-sm   { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg   { font-size: 1.125rem; }
.text-xl   { font-size: 1.25rem; }
.text-2xl  { font-size: 1.5rem; }
.text-3xl  { font-size: 1.875rem; }
.text-4xl  { font-size: 2.25rem; }

.font-bold     { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium   { font-weight: 500; }

.italic { font-style: italic; }

/* ============================================================
   Layout helpers
   ============================================================ */

.container {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.flex         { display: flex; }
.flex-col     { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm  { gap: var(--space-sm); }
.gap-md  { gap: var(--space-md); }
.gap-lg  { gap: var(--space-lg); }

/* ============================================================
   Card component
   ============================================================ */

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.card-hover {
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
}

.card-hover:hover {
  border-color: var(--color-accent-gold);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 168, 75, 0.15);
}

/* ============================================================
   Button components
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  min-height: 44px;
  transition: opacity var(--transition-fast), transform var(--transition-fast), background var(--transition-fast);
  text-decoration: none;
}

.btn:hover   { opacity: 0.9; transform: translateY(-1px); }
.btn:active  { transform: translateY(0); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.btn-primary {
  background: var(--color-accent-gold);
  color: #0A0E1A;
}

.btn-secondary {
  background: var(--color-bg-secondary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-danger {
  background: var(--color-accent-red);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn-full { width: 100%; }

/* ============================================================
   Form components
   ============================================================ */

.input {
  width: 100%;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-primary);
  min-height: 44px;
  transition: border-color var(--transition-fast);
  outline: none;
}

.input:focus {
  border-color: var(--color-accent-gold);
}

.input::placeholder {
  color: var(--color-text-muted);
}

.textarea {
  width: 100%;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  color: var(--color-text-primary);
  resize: vertical;
  min-height: 120px;
  transition: border-color var(--transition-fast);
  outline: none;
  line-height: 1.6;
}

.textarea:focus {
  border-color: var(--color-accent-gold);
}

/* ============================================================
   HUD — sticky top bar
   ============================================================ */

.hud {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.hud-name {
  font-weight: 700;
  color: var(--color-accent-gold);
  font-size: 0.9rem;
}

.hud-stats {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  font-size: 0.875rem;
}

.hud-xp {
  color: var(--color-accent-gold);
  font-weight: 600;
}

.hud-level {
  color: var(--color-text-secondary);
}

.hud-streak {
  color: #F97316;
  font-weight: 600;
}

.xp-bar-track {
  width: 100%;
  height: 4px;
  background: var(--color-border);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-top: var(--space-xs);
}

.xp-bar-fill {
  height: 100%;
  background: var(--color-accent-gold);
  border-radius: var(--radius-pill);
  transition: width 600ms ease;
}

/* ============================================================
   XP pill
   ============================================================ */

.xp-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(200, 168, 75, 0.15);
  border: 1px solid var(--color-accent-gold);
  color: var(--color-accent-gold);
  border-radius: var(--radius-pill);
  padding: 2px var(--space-sm);
  font-size: 0.8rem;
  font-weight: 600;
}

/* ============================================================
   SAMA Reference blockquote
   ============================================================ */

.sama-ref {
  border-left: 3px solid var(--color-accent-gold);
  padding: var(--space-sm) var(--space-md);
  background: rgba(200, 168, 75, 0.08);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

/* ============================================================
   Toast notification
   ============================================================ */

.toast {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: var(--space-sm) var(--space-lg);
  color: var(--color-text-primary);
  font-size: 0.875rem;
  z-index: 200;
  opacity: 0;
  transition: transform var(--transition-base), opacity var(--transition-base);
  white-space: nowrap;
}

.toast.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ============================================================
   Modal overlay
   ============================================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 26, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
  padding: var(--space-md);
}

.modal {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  width: 100%;
  max-width: 440px;
}

/* ============================================================
   Screen transitions
   ============================================================ */

.screen {
  animation: slide-in var(--transition-base) ease forwards;
}

/* ============================================================
   Loading spinner
   ============================================================ */

.spinner-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-2xl);
  color: var(--color-text-secondary);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent-gold);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
}

/* ============================================================
   Score circle
   ============================================================ */

.score-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 4px solid var(--color-accent-gold);
  background: rgba(200, 168, 75, 0.1);
  margin: 0 auto;
}

.score-circle .score-number {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-accent-gold);
  line-height: 1;
}

.score-circle .score-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ============================================================
   MCQ option buttons
   ============================================================ */

.option-btn {
  width: 100%;
  text-align: left;
  padding: var(--space-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  min-height: 52px;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  font-size: 0.95rem;
  line-height: 1.4;
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.option-btn:hover:not(:disabled) {
  border-color: var(--color-accent-gold);
  background: rgba(200, 168, 75, 0.06);
}

.option-btn.correct {
  border-color: var(--color-accent-green);
  background: rgba(34, 197, 94, 0.1);
  color: var(--color-accent-green);
}

.option-btn.incorrect {
  border-color: var(--color-accent-red);
  background: rgba(239, 68, 68, 0.1);
  color: var(--color-accent-red);
}

.option-key {
  font-weight: 700;
  min-width: 22px;
  color: var(--color-accent-gold);
}

/* ============================================================
   Feedback panel verdict header
   ============================================================ */

.verdict-correct {
  color: var(--color-accent-green);
  font-size: 1.25rem;
  font-weight: 700;
}

.verdict-incorrect {
  color: var(--color-accent-red);
  font-size: 1.25rem;
  font-weight: 700;
}

/* ============================================================
   Domain coverage bars
   ============================================================ */

.domain-bar-track {
  height: 8px;
  background: var(--color-border);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.domain-bar-fill {
  height: 100%;
  background: var(--color-accent-gold);
  border-radius: var(--radius-pill);
  transition: width 800ms ease;
}

/* ============================================================
   Badge grid
   ============================================================ */

.badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm);
  text-align: center;
}

.badge-item.earned .badge-icon { filter: none; }
.badge-item.unearned .badge-icon { filter: grayscale(1) opacity(0.4); }

.badge-icon {
  font-size: 2rem;
  line-height: 1;
}

.badge-name {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

/* ============================================================
   Power-up row
   ============================================================ */

.powerup-row {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.powerup-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-xs) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  background: var(--color-bg-secondary);
  min-height: 36px;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.powerup-btn:hover:not(:disabled) {
  border-color: var(--color-text-secondary);
  color: var(--color-text-primary);
}

.powerup-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ============================================================
   Animations
   ============================================================ */

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

@keyframes slide-in {
  from { opacity: 0; transform: translateX(24px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes badge-pop {
  0%   { transform: scale(0); opacity: 0; }
  70%  { transform: scale(1.15); opacity: 1; }
  100% { transform: scale(1); }
}

@keyframes streak-fire {
  0%, 100% { box-shadow: 0 0 0 0 rgba(249, 115, 22, 0); }
  50%       { box-shadow: 0 0 16px 4px rgba(249, 115, 22, 0.5); }
}

@keyframes level-up-flash {
  0%   { opacity: 0; }
  20%  { opacity: 0.6; }
  100% { opacity: 0; }
}

@keyframes xp-fill {
  from { width: var(--xp-from, 0%); }
  to   { width: var(--xp-to, 0%); }
}

/* Level-up overlay */
.level-up-overlay {
  position: fixed;
  inset: 0;
  background: rgba(200, 168, 75, 0.25);
  pointer-events: none;
  z-index: 400;
  animation: level-up-flash 1200ms ease forwards;
}

/* Badge unlock popup */
.badge-unlock-popup {
  position: fixed;
  bottom: var(--space-2xl);
  right: var(--space-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-accent-gold);
  border-radius: var(--radius-lg);
  padding: var(--space-md) var(--space-lg);
  z-index: 250;
  animation: badge-pop 400ms ease forwards;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  max-width: 280px;
}

.on-fire {
  animation: streak-fire 1000ms ease infinite;
}

/* ============================================================
   Welcome screen
   ============================================================ */

.welcome-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-2xl) var(--space-md);
  text-align: center;
  gap: var(--space-lg);
}

.logo-text {
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  font-weight: 700;
  color: var(--color-accent-gold);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1.2;
}

.logo-sub {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ============================================================
   Main menu
   ============================================================ */

.menu-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.menu-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 64px;
  cursor: pointer;
  transition: border-color var(--transition-base), transform var(--transition-base), box-shadow var(--transition-base);
  text-align: left;
  width: 100%;
}

.menu-card:hover {
  border-color: var(--color-accent-gold);
  transform: translateX(4px);
  box-shadow: -4px 0 0 0 var(--color-accent-gold);
}

.menu-card-icon {
  font-size: 1.5rem;
  min-width: 36px;
  text-align: center;
}

.menu-card-body {
  flex: 1;
}

.menu-card-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text-primary);
}

.menu-card-sub {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.menu-card-badge {
  font-size: 1rem;
}

/* ============================================================
   Question card
   ============================================================ */

.question-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.question-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.scene-text {
  font-style: italic;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.question-text {
  font-weight: 600;
  font-size: 1.05rem;
  margin-bottom: var(--space-lg);
  line-height: 1.5;
}

.hint-box {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid var(--color-accent-blue);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  font-size: 0.875rem;
  color: var(--color-accent-blue);
  margin-top: var(--space-md);
}

/* ============================================================
   Progress bar (module questions)
   ============================================================ */

.progress-track {
  height: 4px;
  background: var(--color-border);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-bottom: var(--space-lg);
}

.progress-fill {
  height: 100%;
  background: var(--color-accent-gold);
  border-radius: var(--radius-pill);
  transition: width var(--transition-base);
}

/* ============================================================
   Stats screen
   ============================================================ */

.stat-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.stat-row:last-child { border-bottom: none; }

/* ============================================================
   Responsive — 375px mobile
   ============================================================ */

@media (max-width: 480px) {
  .hud {
    flex-direction: column;
    align-items: flex-start;
  }

  .hud-stats {
    gap: var(--space-sm);
    font-size: 0.8rem;
  }

  .container {
    padding: 0 var(--space-sm);
  }

  .card {
    padding: var(--space-md);
  }

  .modal {
    padding: var(--space-lg);
  }

  .badge-unlock-popup {
    right: var(--space-sm);
    left: var(--space-sm);
    max-width: none;
  }

  .powerup-row {
    gap: var(--space-xs);
  }

  .powerup-btn {
    font-size: 0.75rem;
    padding: var(--space-xs) var(--space-sm);
  }
}