.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0.75rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  animation: slideDown 0.4s ease;
}

.navbar__logo {
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar__menu {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  align-items: center;
}

.navbar__link {
  color: var(--text-secondary);
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.navbar__link:hover,
.navbar__link.active {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.navbar__controls {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.navbar__hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
}

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 6rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero__canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 4s ease infinite;
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.5rem);
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  background: var(--gradient-primary);
  color: white;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 1.1rem;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hero__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--accent-glow);
}

.section {
  padding: 5rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.section__header {
  text-align: center;
  margin-bottom: 3rem;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.section__desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
}

.showcase-card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.showcase-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.showcase-card__canvas {
  width: 100%;
  height: 300px;
  display: block;
  background: var(--bg-secondary);
}

.showcase-card__content {
  padding: 1.5rem;
}

.showcase-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.showcase-card__desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.game-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.game-canvas {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  cursor: crosshair;
  max-width: 100%;
}

.game-controls {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.game-stats {
  display: flex;
  gap: 2rem;
  font-size: 1.1rem;
}

.game-stats__label {
  color: var(--text-secondary);
}

.game-stats__value {
  font-weight: 700;
  color: var(--accent-primary);
}

.sorting-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
}

.sorting-canvas {
  width: 100%;
  max-width: 800px;
  height: 350px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.sorting-controls {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.sorting-controls label {
  color: var(--text-secondary);
  font-weight: 500;
}

.sorting-controls select,
.sorting-controls input[type="range"] {
  padding: 0.5rem;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
}

.audio-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: center;
}

.audio-visualizer-canvas {
  width: 100%;
  max-width: 800px;
  height: 250px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
}

.synth-pad {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.5rem;
  max-width: 500px;
  width: 100%;
}

.synth-key {
  padding: 1.5rem 0.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.synth-key:hover,
.synth-key:active {
  background: var(--accent-primary);
  color: white;
  transform: scale(1.05);
}

.synth-controls {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.about-container {
  max-width: 900px;
  margin: 0 auto;
}

.about-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.about-feature {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
}

.about-feature__icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.about-feature__title {
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.about-feature__desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.toggle-switch {
  position: relative;
  width: 50px;
  height: 26px;
  display: inline-block;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-tertiary);
  border-radius: 26px;
  transition: var(--transition-normal);
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: var(--transition-normal);
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--accent-primary);
}

.toggle-switch input:checked + .toggle-slider:before {
  transform: translateX(24px);
}

.lang-switcher {
  display: flex;
  gap: 0.25rem;
  background: var(--bg-tertiary);
  padding: 0.25rem;
  border-radius: var(--radius-sm);
}

.lang-btn {
  padding: 0.35rem 0.75rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-weight: 600;
  cursor: pointer;
  border-radius: 6px;
  transition: all var(--transition-fast);
}

.lang-btn.active {
  background: var(--accent-primary);
  color: white;
}

.footer {
  text-align: center;
  padding: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.control-btn {
  padding: 0.6rem 1.2rem;
  background: var(--accent-primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.control-btn:hover {
  background: var(--accent-secondary);
  transform: translateY(-1px);
}

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

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

.control-btn.secondary:hover {
  background: var(--border-color);
}

@media (max-width: 768px) {
  .navbar__menu {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1rem;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-normal);
  }

  .navbar__menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .navbar__hamburger {
    display: flex;
  }

  .showcase-grid {
    grid-template-columns: 1fr;
  }

  .synth-pad {
    grid-template-columns: repeat(4, 1fr);
  }
}