:root {
  --bg-dark: #0f172b;
  --bg-card: rgba(30, 41, 59, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  --border-color: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(205, 91, 87, 0.4);
  --border-secondary-glow: rgba(165, 198, 234, 0.35);
  
  --primary: #cd5b57;
  --primary-hover: #b84a46;
  --primary-glow: rgba(205, 91, 87, 0.25);
  
  --secondary: #a5c6ea;
  --secondary-hover: #8cb5e3;
  --secondary-glow: rgba(165, 198, 234, 0.2);

  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-amber: #f59e0b;

  --text-main: #ffffff;
  --text-muted: #94a3b8;
  --text-sub: #cbd5e1;

  --font-heading: 'Oswald', system-ui, -apple-system, sans-serif;
  --font-mono: 'Roboto Mono', monospace;
  --font-sans: 'Roboto', system-ui, -apple-system, sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Ambient Background Lights */
.ambient-glow-1 {
  position: fixed;
  top: -160px;
  left: 50%;
  transform: translateX(-50%);
  width: 750px;
  height: 750px;
  background: radial-gradient(circle, rgba(205, 91, 87, 0.16) 0%, rgba(15, 23, 43, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

.ambient-glow-2 {
  position: fixed;
  bottom: -150px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(165, 198, 234, 0.12) 0%, rgba(15, 23, 43, 0) 70%);
  pointer-events: none;
  z-index: 0;
}

/* Header */
.quiz-header {
  position: relative;
  z-index: 10;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  padding: 2rem 1.5rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-badge {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, #8c3b38 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.4rem;
  box-shadow: 0 4px 15px rgba(205, 91, 87, 0.4);
}

.brand-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.brand-title span {
  color: var(--secondary);
}

.portal-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-pill {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(165, 198, 234, 0.08);
  border: 1px solid rgba(165, 198, 234, 0.2);
  color: var(--secondary);
  text-decoration: none;
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-pill:hover {
  background: rgba(165, 198, 234, 0.16);
  border-color: var(--secondary);
  color: #fff;
}

/* Glass Card */
.glass-panel {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  position: relative;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
  transition: var(--transition-normal);
}

.glass-panel:hover {
  border-color: rgba(255, 255, 255, 0.16);
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.gradient-text {
  background: linear-gradient(180deg, #ffffff 0%, #cbd5e1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: var(--transition-fast);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #a84340 100%);
  color: #ffffff;
  box-shadow: 0 4px 18px var(--primary-glow);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #df6b67 0%, var(--primary) 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(205, 91, 87, 0.4);
}

.btn-secondary {
  background: rgba(165, 198, 234, 0.12);
  border: 1px solid rgba(165, 198, 234, 0.3);
  color: var(--secondary);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(165, 198, 234, 0.22);
  border-color: var(--secondary);
  color: #fff;
  transform: translateY(-2px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* Form Controls */
.form-group {
  margin-bottom: 1.4rem;
  text-align: left;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  padding: 0.85rem 1rem;
  background: rgba(15, 23, 43, 0.65);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: #ffffff;
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px var(--secondary-glow);
  background: rgba(15, 23, 43, 0.85);
}

/* Badges & Tags */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
}

.badge-primary {
  background: rgba(205, 91, 87, 0.15);
  border: 1px solid rgba(205, 91, 87, 0.35);
  color: var(--primary);
}

.badge-secondary {
  background: rgba(165, 198, 234, 0.12);
  border: 1px solid rgba(165, 198, 234, 0.3);
  color: var(--secondary);
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  color: var(--accent-green);
}

/* Pulse animation */
@keyframes pulseGlow {
  0% { opacity: 0.6; transform: scale(0.95); }
  50% { opacity: 1; transform: scale(1.1); }
  100% { opacity: 0.6; transform: scale(0.95); }
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
  animation: pulseGlow 2s infinite;
}

/* Quiz Option Cards */
.option-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 1rem 1.25rem;
  background: rgba(15, 23, 43, 0.55);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
  user-select: none;
}

.option-card:hover {
  background: rgba(15, 23, 43, 0.8);
  border-color: rgba(165, 198, 234, 0.4);
  transform: translateX(4px);
}

.option-card.selected {
  background: rgba(205, 91, 87, 0.12);
  border-color: var(--primary);
  box-shadow: 0 0 16px var(--primary-glow);
}

.option-radio {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition-fast);
}

.option-card.selected .option-radio {
  border-color: var(--primary);
}

.radio-inner {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0;
  transform: scale(0.5);
  transition: var(--transition-fast);
}

.option-card.selected .radio-inner {
  opacity: 1;
  transform: scale(1);
}

.option-text {
  font-size: 1rem;
  color: var(--text-sub);
  line-height: 1.5;
}

.option-card.selected .option-text {
  color: #ffffff;
  font-weight: 500;
}

/* Stat Box */
.stat-box {
  background: rgba(15, 23, 43, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  text-align: center;
}

.stat-value {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.35rem;
}

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

/* Question Breakdown Cards */
.breakdown-card {
  background: rgba(15, 23, 43, 0.55);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: var(--transition-fast);
}

.breakdown-card.correct {
  border-left: 4px solid var(--accent-green);
}

.breakdown-card.incorrect {
  border-left: 4px solid var(--accent-red);
}

/* Footer */
.quiz-footer {
  position: relative;
  z-index: 10;
  padding: 2rem 1.5rem;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: auto;
}

.quiz-footer a {
  color: var(--secondary);
  text-decoration: none;
}

.quiz-footer a:hover {
  text-decoration: underline;
  color: #fff;
}