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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: linear-gradient(135deg, #0b141d 0%, #1e3a8a 50%, #000000 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.container {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
  border-radius: 16px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  padding: 32px;
  width: 100%;
  max-width: 48rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.header {
  text-align: center;
  margin-bottom: 32px;
}

.title {
  font-size: 2.25rem;
  font-weight: bold;
  color: white;
  margin-bottom: 8px;
}

.subtitle {
  color: #bfdbfe;
}

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 768px) {
  .grid {
    grid-template-columns: 1fr 1fr;
  }
}

.track-container {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.track-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: white;
  margin-bottom: 16px;
  text-align: center;
}

.form-group {
  margin-bottom: 16px;
}

.label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: #bfdbfe;
  margin-bottom: 8px;
}

.input {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  color: white;
  font-size: 1rem;
  transition: all 0.2s;
}

.input:focus {
  outline: none;
  border-color: transparent;
}

.input::placeholder {
  color: #d1d5db;
}

.button-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.time-signature-btn {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  color: #bfdbfe;
  cursor: pointer;
}

.time-signature-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
}

.time-signature-btn.active-blue {
  background: #3b82f6;
  color: white;
  border-color: #60a5fa;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.time-signature-btn.active-purple {
  background: #8b5cf6;
  color: white;
  border-color: #a78bfa;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}