styles.css

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a25;
  --bg-card: rgba(26, 26, 37, 0.8);
  --bg-glass: rgba(26, 26, 37, 0.6);
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  --accent-cyan: #00f5ff;
  --accent-purple: #bf00ff;
  --accent-blue: #3b82f6;
  --accent-pink: #ec4899;
  --accent-green: #10b981;
  --accent-orange: #f59e0b;
  --accent-red: #ef4444;
  --gradient-primary: linear-gradient(135deg, #00f5ff 0%, #bf00ff 100%);
  --gradient-secondary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
  --gradient-glow: radial-gradient(
    ellipse at center,
    rgba(0, 245, 255, 0.15) 0%,
    transparent 70%
  );
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 245, 255, 0.3);
  --font-primary: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(0, 245, 255, 0.15);
  --shadow-glow-purple: 0 0 40px rgba(191, 0, 255, 0.15);
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  font-size: 16px;
}
body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
ul {
  list-style: none;
}
img {
  max-width: 100%;
  display: block;
}
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-md) 0;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition-base);
}
.navbar.scrolled {
  padding: var(--spacing-sm) 0;
  background: rgba(10, 10, 15, 0.95);
}
.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}
.logo-icon {
  width: 40px;
  height: 40px;
}
.logo-icon svg {
  width: 100%;
  height: 100%;
}
.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.logo-text .pro {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}
.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--spacing-sm) 0;
  position: relative;
  transition: var(--transition-base);
}
.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-base);
}
.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}
.btn-ghost {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: var(--transition-base);
}
.btn-ghost:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}
.btn-ghost svg {
  width: 20px;
  height: 20px;
}
.btn-ghost .icon-moon {
  display: none;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--bg-primary);
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.2) 0%,
    transparent 50%
  );
  opacity: 0;
  transition: var(--transition-base);
}
.btn-primary:hover::before {
  opacity: 1;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.btn-primary svg {
  width: 18px;
  height: 18px;
}
.btn-primary.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}
.btn-outline:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 245, 255, 0.1);
  box-shadow: var(--shadow-glow);
}
.btn-outline svg {
  width: 18px;
  height: 18px;
}
.btn-outline.btn-lg {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
}
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem var(--spacing-xl) var(--spacing-3xl);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-glow);
  pointer-events: none;
}
.hero-content {
  flex: 1;
  max-width: 700px;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  backdrop-filter: blur(10px);
}
.badge-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.2);
  }
}
.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-lg);
}
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-xl);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-3xl);
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2xl);
}
.stat {
  display: flex;
  flex-direction: column;
}
.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-suffix {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}
.quantum-sphere {
  width: 400px;
  height: 400px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  animation: float 6s ease-in-out infinite;
}
@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}
.sphere-ring {
  position: absolute;
  border: 2px solid transparent;
  border-radius: 50%;
  animation: rotate 20s linear infinite;
}
.ring-1 {
  width: 300px;
  height: 300px;
  border-color: rgba(0, 245, 255, 0.4);
  animation-duration: 15s;
}
.ring-2 {
  width: 350px;
  height: 200px;
  border-color: rgba(191, 0, 255, 0.3);
  transform: rotateX(60deg);
  animation-duration: 20s;
  animation-direction: reverse;
}
.ring-3 {
  width: 350px;
  height: 200px;
  border-color: rgba(59, 130, 246, 0.3);
  transform: rotateX(60deg) rotateY(60deg);
  animation-duration: 25s;
}
@keyframes rotate {
  from {
    transform: rotateZ(0deg);
  }
  to {
    transform: rotateZ(360deg);
  }
}
.sphere-core {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: 50%;
  box-shadow:
    0 0 60px rgba(0, 245, 255, 0.5),
    0 0 120px rgba(191, 0, 255, 0.3),
    inset 0 0 30px rgba(255, 255, 255, 0.2);
  animation: glow 3s ease-in-out infinite;
}
@keyframes glow {
  0%,
  100% {
    box-shadow:
      0 0 60px rgba(0, 245, 255, 0.5),
      0 0 120px rgba(191, 0, 255, 0.3);
  }
  50% {
    box-shadow:
      0 0 80px rgba(0, 245, 255, 0.7),
      0 0 160px rgba(191, 0, 255, 0.5);
  }
}
.qubit-particles {
  position: absolute;
  width: 100%;
  height: 100%;
}
.qubit {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 20px var(--accent-cyan);
  animation: orbit 10s linear infinite;
}
.q1 {
  animation-duration: 8s;
  animation-delay: 0s;
}
.q2 {
  animation-duration: 10s;
  animation-delay: -2s;
}
.q3 {
  animation-duration: 12s;
  animation-delay: -4s;
}
.q4 {
  animation-duration: 9s;
  animation-delay: -6s;
  animation-direction: reverse;
}
.q5 {
  animation-duration: 11s;
  animation-delay: -8s;
}
.q6 {
  animation-duration: 7s;
  animation-delay: -3s;
  animation-direction: reverse;
}
@keyframes orbit {
  0% {
    transform: rotate(0deg) translateX(150px) rotate(0deg);
  }
  100% {
    transform: rotate(360deg) translateX(150px) rotate(-360deg);
  }
}
section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}
.section-tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: var(--spacing-md);
}
.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-md);
}
.section-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}
.features {
  background: var(--bg-secondary);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  opacity: 0;
  transition: var(--transition-base);
}
.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}
.feature-card:hover::before {
  opacity: 0.05;
}
.feature-card.featured {
  grid-column: span 2;
  background: linear-gradient(
    135deg,
    rgba(0, 245, 255, 0.1) 0%,
    rgba(191, 0, 255, 0.1) 100%
  );
  border-color: var(--border-glow);
}
.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  position: relative;
  z-index: 1;
}
.feature-icon svg {
  width: 28px;
  height: 28px;
}
.feature-icon.blue {
  color: var(--accent-blue);
}
.feature-icon.purple {
  color: var(--accent-purple);
}
.feature-icon.cyan {
  color: var(--accent-cyan);
}
.feature-icon.green {
  color: var(--accent-green);
}
.feature-icon.orange {
  color: var(--accent-orange);
}
.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  position: relative;
  z-index: 1;
}
.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  position: relative;
  z-index: 1;
}
.feature-link {
  display: inline-flex;
  align-items: center;
  margin-top: var(--spacing-md);
  color: var(--accent-cyan);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: var(--transition-base);
  position: relative;
  z-index: 1;
}
.feature-link:hover {
  gap: var(--spacing-sm);
}
.scope-section {
  background: var(--bg-primary);
}
.scope-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
}
.scope-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: var(--transition-base);
}
.scope-card:hover {
  border-color: var(--border-glow);
}
.scope-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  color: var(--accent-cyan);
}
.scope-icon.warning {
  color: var(--accent-orange);
}
.scope-icon svg {
  width: 24px;
  height: 24px;
}
.scope-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}
.scope-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-sm);
}
.scope-card strong {
  color: var(--accent-cyan);
  font-weight: 600;
}
.scope-card ul {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.8;
  padding-left: var(--spacing-lg);
  list-style: disc;
}
.scope-card ul li {
  margin-bottom: var(--spacing-xs);
}
.simulator-section {
  background: var(--bg-primary);
  overflow: visible;
}
.simulator-wrapper {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.simulator-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
}
.toolbar-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}
.toolbar-divider {
  width: 1px;
  height: 24px;
  background: var(--border-color);
  margin: 0 var(--spacing-sm);
}
.tool-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: var(--transition-base);
}
.tool-btn svg {
  width: 18px;
  height: 18px;
}
.tool-btn:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}
.tool-btn.active {
  background: var(--accent-cyan);
  color: var(--bg-primary);
}
.tool-btn.danger:hover {
  background: rgba(239, 68, 68, 0.2);
  color: var(--accent-red);
}
.tool-btn.success {
  background: var(--accent-green);
  color: var(--bg-primary);
}
.tool-btn.success:hover {
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
}
.simulator-main {
  display: grid;
  grid-template-columns: 250px 1fr 300px;
  min-height: 500px;
}
.gates-panel {
  background: var(--bg-card);
  border-right: 1px solid var(--border-color);
  padding: var(--spacing-lg);
  overflow-y: auto;
  max-height: 600px;
}
.gates-category {
  margin-bottom: var(--spacing-xl);
}
.gates-category h4 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
}
.gates-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
}
.gate-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: grab;
  transition: var(--transition-base);
}
.gate-item:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 245, 255, 0.1);
  transform: translateY(-2px);
}
.gate-item:active {
  cursor: grabbing;
}
.gate-symbol {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent-cyan);
}
.gate-name {
  font-size: 0.625rem;
  color: var(--text-muted);
  margin-top: 2px;
  text-align: center;
}
.gate-item.multi .gate-symbol {
  color: var(--accent-purple);
}
.gate-item.measure .gate-symbol {
  font-size: 1.25rem;
}
.circuit-canvas-container {
  padding: var(--spacing-lg);
  overflow-x: auto;
  background: radial-gradient(
    circle at 1px 1px,
    var(--border-color) 1px,
    transparent 0
  );
  background-size: 20px 20px;
}
.circuit-canvas {
  min-width: 600px;
  min-height: 200px;
}
.qubit-row {
  display: flex;
  align-items: center;
  height: 60px;
  margin-bottom: var(--spacing-md);
}
.qubit-label {
  width: 50px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.qubit-wire {
  flex: 1;
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}
.wire-line {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--text-muted);
  transform: translateY(-50%);
}
.gate-slots {
  display: flex;
  gap: var(--spacing-md);
  position: relative;
  z-index: 1;
  padding: 0 var(--spacing-md);
}
.placed-gate {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border: 2px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-cyan);
  cursor: pointer;
  transition: var(--transition-base);
  box-shadow: 0 0 15px rgba(0, 245, 255, 0.3);
}
.placed-gate:hover {
  transform: scale(1.1);
  box-shadow: 0 0 25px rgba(0, 245, 255, 0.5);
}
.qubit-output {
  width: 50px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-cyan);
  text-align: right;
}
.results-panel {
  background: var(--bg-card);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
}
.results-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
}
.tab-btn {
  flex: 1;
  padding: var(--spacing-md);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  transition: var(--transition-base);
}
.tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}
.tab-btn.active {
  color: var(--accent-cyan);
  background: var(--bg-tertiary);
  border-bottom: 2px solid var(--accent-cyan);
}
.results-content {
  flex: 1;
  padding: var(--spacing-md);
  overflow-y: auto;
}
.tab-content {
  display: none;
}
.tab-content.active {
  display: block;
}
.statevector-display {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}
.state-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  position: relative;
  overflow: hidden;
}
.state-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: linear-gradient(
    90deg,
    rgba(0, 245, 255, 0.2) 0%,
    rgba(191, 0, 255, 0.2) 100%
  );
  border-radius: var(--radius-md);
  transition: width 0.5s ease;
}
.state-basis {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-cyan);
  width: 50px;
  position: relative;
  z-index: 1;
}
.state-amplitude {
  font-family: var(--font-mono);
  color: var(--text-secondary);
  position: relative;
  z-index: 1;
}
.probability-chart,
.bloch-container {
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
}
#prob-canvas,
#bloch-canvas {
  max-width: 100%;
  max-height: 100%;
}
.algorithms-section {
  background: var(--bg-secondary);
}
.algorithms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
}
.algorithm-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: var(--transition-base);
}
.algorithm-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}
.algo-visual {
  height: 160px;
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
}
.algo-animation {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.search-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.search-item {
  width: 24px;
  height: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  animation: searchPulse 2s infinite;
}
.search-item.target {
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 20px var(--accent-cyan);
  animation: targetGlow 1s infinite;
}
@keyframes searchPulse {
  0%,
  100% {
    opacity: 0.5;
  }
  50% {
    opacity: 1;
  }
}
@keyframes targetGlow {
  0%,
  100% {
    box-shadow: 0 0 20px var(--accent-cyan);
  }
  50% {
    box-shadow: 0 0 40px var(--accent-cyan);
  }
}
.factor-display {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
}
.factor-display .number {
  color: var(--text-primary);
}
.factor-display .equals,
.factor-display .times {
  color: var(--text-muted);
}
.factor-display .factor {
  color: var(--accent-purple);
  animation: factorPop 2s infinite;
}
@keyframes factorPop {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
  }
}
.wave-container {
  width: 120px;
  height: 60px;
}
.wave-container svg {
  width: 100%;
  height: 100%;
}
.wave {
  fill: none;
  stroke-width: 2;
  animation: waveMove 2s ease-in-out infinite;
}
.wave1 {
  stroke: var(--accent-cyan);
}
.wave2 {
  stroke: var(--accent-purple);
  animation-delay: 0.5s;
}
@keyframes waveMove {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(5px);
  }
}
.molecule {
  display: flex;
  align-items: center;
}
.atom {
  width: 30px;
  height: 30px;
  background: var(--gradient-primary);
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(0, 245, 255, 0.5);
  animation: atomPulse 2s infinite;
}
.bond {
  width: 30px;
  height: 4px;
  background: var(--text-muted);
  animation: bondStretch 2s infinite;
}
@keyframes atomPulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
}
@keyframes bondStretch {
  0%,
  100% {
    width: 30px;
  }
  50% {
    width: 40px;
  }
}
.graph-nodes {
  position: relative;
  width: 100px;
  height: 100px;
}
.graph-nodes .node {
  position: absolute;
  width: 16px;
  height: 16px;
  background: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-green);
}
.node.n1 {
  top: 10%;
  left: 10%;
}
.node.n2 {
  top: 10%;
  right: 10%;
}
.node.n3 {
  bottom: 10%;
  right: 10%;
}
.node.n4 {
  bottom: 10%;
  left: 10%;
}
.graph-nodes .edges {
  position: absolute;
  width: 100%;
  height: 100%;
}
.graph-nodes .edges line {
  stroke: var(--text-muted);
  stroke-width: 1;
}
.key-stream {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 1.5rem;
}
.photon-stream {
  display: flex;
  gap: var(--spacing-sm);
}
.photon {
  width: 8px;
  height: 8px;
  background: var(--accent-orange);
  border-radius: 50%;
  animation: photonMove 1s infinite;
}
.photon:nth-child(2) {
  animation-delay: 0.3s;
}
.photon:nth-child(3) {
  animation-delay: 0.6s;
}
@keyframes photonMove {
  0% {
    transform: translateX(-20px);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    transform: translateX(20px);
    opacity: 0;
  }
}
.algo-content {
  padding: var(--spacing-lg);
}
.algo-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}
.algo-content p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: var(--spacing-md);
}
.algo-meta {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}
.algo-meta .tag {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-cyan);
}
.algo-meta .complexity {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(191, 0, 255, 0.2);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--accent-purple);
}
.visualizer-section {
  background: var(--bg-primary);
}
.visualizer-container {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: var(--spacing-xl);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-2xl);
  overflow: hidden;
}
.viz-controls {
  padding: var(--spacing-xl);
  border-right: 1px solid var(--border-color);
}
.control-group {
  margin-bottom: var(--spacing-xl);
}
.control-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}
.state-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
}
.state-btn {
  padding: var(--spacing-sm);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}
.state-btn:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
}
.state-btn.active {
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
  color: var(--bg-primary);
}
.slider {
  width: 100%;
  height: 8px;
  appearance: none;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  outline: none;
}
.slider::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--gradient-primary);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
}
.gate-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}
.gate-btn {
  width: 40px;
  height: 40px;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition-base);
}
.gate-btn:hover {
  background: rgba(0, 245, 255, 0.2);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}
.state-info {
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
}
.state-info h4 {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}
.state-equation {
  font-family: var(--font-mono);
  font-size: 1rem;
  text-align: center;
  padding: var(--spacing-md);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}
.state-equation span {
  color: var(--accent-cyan);
}
.probability-display {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}
.prob-bar {
  position: relative;
  padding: var(--spacing-sm);
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.prob-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  transition: width 0.5s ease;
}
.prob-fill.prob-0 {
  background: linear-gradient(
    90deg,
    rgba(0, 245, 255, 0.3) 0%,
    rgba(0, 245, 255, 0.1) 100%
  );
}
.prob-fill.prob-1 {
  background: linear-gradient(
    90deg,
    rgba(191, 0, 255, 0.3) 0%,
    rgba(191, 0, 255, 0.1) 100%
  );
}
.prob-bar span {
  position: relative;
  z-index: 1;
  font-size: 0.75rem;
  color: var(--text-secondary);
}
.viz-canvas {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 500px;
  padding: var(--spacing-xl);
}
#bloch-main-canvas {
  max-width: 100%;
  max-height: 100%;
}
.viz-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.axis-label {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.axis-label.top {
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
}
.axis-label.bottom {
  bottom: 10%;
  left: 50%;
  transform: translateX(-50%);
}
.axis-label.right {
  right: 10%;
  top: 50%;
  transform: translateY(-50%);
}
.axis-label.left {
  left: 10%;
  top: 50%;
  transform: translateY(-50%);
}
.learn-section {
  background: var(--bg-secondary);
}
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}
.course-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}
.course-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
}
.course-number {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  font-size: 3rem;
  font-weight: 800;
  color: var(--bg-tertiary);
  line-height: 1;
}
.course-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-lg);
  color: var(--accent-cyan);
}
.course-icon svg {
  width: 28px;
  height: 28px;
}
.course-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}
.course-card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: var(--spacing-md);
}
.course-meta {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  font-size: 0.75rem;
  color: var(--text-muted);
}
.course-progress {
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-lg);
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  transition: width 0.5s ease;
}
.export-section {
  background: var(--bg-primary);
  padding: var(--spacing-3xl) 0;
}
.export-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  background: linear-gradient(
    135deg,
    rgba(0, 245, 255, 0.1) 0%,
    rgba(191, 0, 255, 0.1) 100%
  );
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
}
.export-content h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}
.export-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
}
.export-frameworks {
  display: flex;
  gap: var(--spacing-lg);
}
.framework {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}
.framework img {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
}
.framework span {
  font-size: 0.75rem;
  color: var(--text-secondary);
}
.export-code {
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.code-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-color);
}
.code-tab {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-base);
}
.code-tab:hover {
  color: var(--text-primary);
}
.code-tab.active {
  color: var(--accent-cyan);
  background: var(--bg-card);
}
.code-block {
  padding: var(--spacing-lg);
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--text-secondary);
  overflow-x: auto;
}
.copy-btn {
  margin: var(--spacing-md);
  margin-top: 0;
}
.copy-btn svg {
  width: 16px;
  height: 16px;
}
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}
.footer-brand p {
  color: var(--text-secondary);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  max-width: 300px;
}
.social-links {
  display: flex;
  gap: var(--spacing-md);
}
.social-links a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: var(--transition-base);
}
.social-links a:hover {
  background: var(--accent-cyan);
  color: var(--bg-primary);
}
.social-links svg {
  width: 20px;
  height: 20px;
}
.footer-links h4 {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}
.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}
.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  transition: var(--transition-base);
}
.footer-links a:hover {
  color: var(--accent-cyan);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
}
.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.875rem;
}
.footer-legal {
  display: flex;
  gap: var(--spacing-lg);
}
.footer-legal a {
  color: var(--text-muted);
  font-size: 0.875rem;
  transition: var(--transition-base);
}
.footer-legal a:hover {
  color: var(--text-primary);
}
@media (max-width: 1200px) {
  .simulator-main {
    grid-template-columns: 200px 1fr 250px;
  }
  .gates-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 1024px) {
  .hero {
    flex-direction: column;
    padding-top: 6rem;
  }
  .hero-visual {
    order: -1;
    margin-bottom: var(--spacing-2xl);
  }
  .quantum-sphere {
    width: 300px;
    height: 300px;
  }
  .simulator-main {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
  }
  .gates-panel {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    max-height: 200px;
  }
  .gates-grid {
    grid-template-columns: repeat(6, 1fr);
  }
  .results-panel {
    border-left: none;
    border-top: 1px solid var(--border-color);
  }
  .visualizer-container {
    grid-template-columns: 1fr;
  }
  .viz-controls {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .export-card {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .hero-stats {
    gap: var(--spacing-lg);
  }
  .stat-value {
    font-size: 2rem;
  }
  .feature-card.featured {
    grid-column: span 1;
  }
  .features-grid,
  .algorithms-grid,
  .courses-grid {
    grid-template-columns: 1fr;
  }
  .gates-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
}
@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  .hero-title {
    font-size: 2rem;
  }
  .hero-actions {
    flex-direction: column;
  }
  .btn-lg {
    width: 100%;
    justify-content: center;
  }
  .hero-stats {
    flex-direction: column;
    align-items: flex-start;
  }
  .gates-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .state-selector {
    grid-template-columns: repeat(2, 1fr);
  }
}

.lm-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  background: rgba(5, 5, 10, 0.75);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), visibility var(--transition-base);
}
.lm-overlay.open {
  opacity: 1;
  visibility: visible;
}
.lm-panel {
  width: 100%;
  max-width: 1100px;
  height: min(88vh, 820px);
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  overflow: hidden;
  transform: translateY(20px) scale(0.98);
  transition: transform var(--transition-slow);
}
.lm-overlay.open .lm-panel {
  transform: none;
}
.lm-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg) var(--spacing-xl);
  border-bottom: 1px solid var(--border-color);
}
.lm-header-text {
  flex: 1;
  min-width: 0;
}
.lm-course-tag,
.lm-lesson-tag {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-cyan);
}
.lm-course-title {
  font-size: 1.375rem;
  font-weight: 700;
}
.lm-header-progress {
  width: 200px;
  font-size: 0.75rem;
  color: var(--text-muted);
}
.lm-progress {
  margin: var(--spacing-xs) 0 0;
}
.lm-close {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-fast);
}
.lm-close:hover {
  color: var(--text-primary);
  border-color: var(--accent-cyan);
}
.lm-body {
  flex: 1;
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 0;
}
.lm-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding: var(--spacing-md);
  border-right: 1px solid var(--border-color);
  overflow-y: auto;
}
.lm-lesson-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font: inherit;
  font-size: 0.875rem;
  text-align: left;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
}
.lm-lesson-link:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}
.lm-lesson-link.active {
  color: var(--text-primary);
  background: rgba(0, 245, 255, 0.08);
  border-color: var(--border-glow);
}
.lm-lesson-num {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
}
.lm-lesson-link.done .lm-lesson-num {
  color: var(--bg-primary);
  background: var(--accent-green);
}
.lm-content {
  padding: var(--spacing-xl);
  overflow-y: auto;
}
.lm-lesson-title {
  margin: var(--spacing-xs) 0 var(--spacing-lg);
  font-size: 1.75rem;
  font-weight: 700;
}
.lm-text {
  color: var(--text-secondary);
  line-height: 1.75;
}
.lm-text p,
.lm-text ul,
.lm-text ol {
  margin-bottom: var(--spacing-md);
}
.lm-text ul,
.lm-text ol {
  padding-left: var(--spacing-lg);
}
.lm-text ul {
  list-style: disc;
}
.lm-text ol {
  list-style: decimal;
}
.lm-text li {
  margin-bottom: var(--spacing-xs);
}
.lm-text h4,
.lm-quiz h4 {
  margin: var(--spacing-lg) 0 var(--spacing-sm);
  font-size: 1rem;
  color: var(--text-primary);
}
.lm-text strong {
  color: var(--text-primary);
}
.lm-formula {
  margin: var(--spacing-md) 0;
  padding: var(--spacing-md) var(--spacing-lg);
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--accent-cyan);
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-left: 3px solid var(--accent-cyan);
  border-radius: var(--radius-md);
  overflow-x: auto;
}
.lm-takeaway,
.lm-lab {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
}
.lm-takeaway {
  background: rgba(191, 0, 255, 0.08);
  border: 1px solid rgba(191, 0, 255, 0.25);
}
.lm-takeaway strong,
.lm-lab strong {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.lm-takeaway strong {
  color: var(--accent-purple);
}
.lm-takeaway p,
.lm-lab p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}
.lm-lab {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
  background: rgba(0, 245, 255, 0.05);
  border: 1px solid var(--border-glow);
}
.lm-lab strong {
  color: var(--accent-cyan);
}
.lm-lab .btn-outline {
  flex-shrink: 0;
  cursor: pointer;
}
.lm-quiz {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-color);
}
.lm-question {
  margin-bottom: var(--spacing-lg);
  border: none;
}
.lm-question legend {
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}
.lm-option {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
}
.lm-option input {
  accent-color: var(--accent-cyan);
}
.lm-option.correct {
  color: var(--text-primary);
  border-color: var(--accent-green);
  background: rgba(16, 185, 129, 0.12);
}
.lm-option.wrong {
  border-color: var(--accent-red);
  background: rgba(239, 68, 68, 0.12);
}
.lm-quiz-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}
.lm-quiz-actions .btn-outline {
  cursor: pointer;
}
.lm-score {
  font-weight: 600;
  color: var(--accent-cyan);
}
.lm-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-xl);
  border-top: 1px solid var(--border-color);
}
.lm-footer button {
  cursor: pointer;
}
.lm-footer button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}
.lm-step {
  font-size: 0.875rem;
  color: var(--text-muted);
}
@media (max-width: 768px) {
  .lm-overlay {
    padding: 0;
  }
  .lm-panel {
    height: 100%;
    border-radius: 0;
  }
  .lm-header {
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
  }
  .lm-header-progress {
    order: 3;
    width: 100%;
  }
  .lm-body {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
  }
  .lm-sidebar {
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
    padding: var(--spacing-sm) var(--spacing-md);
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }
  .lm-lesson-link {
    width: auto;
    flex-shrink: 0;
    padding: var(--spacing-xs);
  }
  .lm-lesson-name {
    display: none;
  }
  .lm-content {
    padding: var(--spacing-lg) var(--spacing-md);
  }
  .lm-lesson-title {
    font-size: 1.375rem;
  }
  .lm-lab {
    flex-direction: column;
    align-items: flex-start;
  }
  .lm-footer {
    padding: var(--spacing-sm) var(--spacing-md);
  }
  .lm-footer button {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
  }
}