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

:root {
  --accent: #ec4899;
  --accent-dim: rgba(236, 72, 153, 0.2);
}

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&display=swap');

body {
  font-family: 'Space Grotesk', sans-serif;
  background: #0a0a0f;
  color: #fff;
  min-height: 100vh;
  overflow: hidden;
}

#particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.back-btn {
  position: fixed;
  top: 1rem;
  left: 1rem;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  z-index: 1000;
  transition: all 0.3s ease;
}

.back-btn svg { width: 18px; height: 18px; }

.back-btn:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent);
  transform: scale(1.1);
}

.overlay {
  position: fixed;
  top: 2rem;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  pointer-events: none;
  z-index: 10;
}

.title {
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  font-weight: 700;
  background: linear-gradient(135deg, #ec4899, #8b5cf6, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.25rem;
}

.subtitle {
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.8rem;
}

.controls {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 1.5rem;
  align-items: center;
  z-index: 100;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(10px);
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.control-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.control-label {
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.toggle-group { display: flex; gap: 0.25rem; }

.toggle-btn {
  padding: 0.35rem 0.6rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: transparent;
  color: rgba(255, 255, 255, 0.5);
  font-family: inherit;
  font-size: 0.7rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border-radius: 4px;
}

.toggle-btn:hover { border-color: var(--accent); color: var(--accent); }
.toggle-btn.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.slider {
  -webkit-appearance: none;
  width: 60px;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  cursor: pointer;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}

.slider::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}

.btn {
  padding: 0.4rem 0.8rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: transparent;
  color: rgba(255, 255, 255, 0.5);
  font-family: inherit;
  font-size: 0.7rem;
  cursor: pointer;
  transition: all 0.2s ease;
  border-radius: 4px;
}

.btn:hover { border-color: var(--accent); color: var(--accent); }

.stats {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(10px);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
  z-index: 100;
}

.footer {
  position: fixed;
  bottom: 0.5rem;
  right: 1rem;
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.3);
  z-index: 100;
}

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

@media (max-width: 700px) {
  .controls {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
  }
}