:root {
  --bg-dark: #1a1a2e;
  --bg-card: #2a2a4a;
  --accent-pink: #ff3a91;
  --accent-teal: #00e0ff;
  --accent-green: #3bff67;
  --text-primary: #e0e0e0;
  --text-muted: #a0a0b0;
}

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

body {
  font-family: 'Chakra Petch', sans-serif;
  background: var(--bg-dark);
  background-image: 
    radial-gradient(ellipse at 0% 0%, rgba(0, 224, 255, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 100% 100%, rgba(255, 58, 145, 0.1) 0%, transparent 50%);
  min-height: 100vh;
  color: var(--text-primary);
  overflow-x: hidden;
}

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 20px;
}

.header {
  text-align: center;
  margin-bottom: 30px;
}

.title {
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  animation: titleGlow 3s ease-in-out infinite;
}

@keyframes titleGlow {
  0%, 100% {
    text-shadow: 
      0 0 10px var(--accent-pink),
      0 0 20px var(--accent-pink),
      0 0 40px var(--accent-teal);
  }
  50% {
    text-shadow: 
      0 0 20px var(--accent-teal),
      0 0 40px var(--accent-teal),
      0 0 60px var(--accent-pink);
  }
}

.main-container {
  background: var(--bg-card);
  border-radius: 20px;
  padding: clamp(15px, 4vw, 30px);
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  box-shadow: 
    0 0 30px rgba(0, 224, 255, 0.2),
    0 0 60px rgba(255, 58, 145, 0.1);
}

.transport-controls {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 25px;
}

.btn {
  font-family: 'Chakra Petch', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  padding: 12px 30px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all 0.15s ease;
}

.btn:active {
  transform: scale(0.95);
}

.btn-play {
  background: var(--accent-green);
  color: #111;
  box-shadow: 0 0 20px rgba(59, 255, 103, 0.4);
}

.btn-play:hover:not(.disabled) {
  box-shadow: 0 0 30px rgba(59, 255, 103, 0.6);
}

.btn-stop {
  background: var(--accent-pink);
  color: #fff;
  box-shadow: 0 0 20px rgba(255, 58, 145, 0.4);
}

.btn-stop:hover:not(.disabled) {
  box-shadow: 0 0 30px rgba(255, 58, 145, 0.6);
}

.btn-clear {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--text-muted);
}

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

.btn.disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.bpm-section {
  text-align: center;
  margin-bottom: 30px;
}

.bpm-label {
  display: block;
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--accent-teal);
}

.bpm-slider {
  width: 100%;
  max-width: 300px;
  height: 8px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--bg-dark);
  border-radius: 4px;
  box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.5);
}

.bpm-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 24px;
  height: 24px;
  background: var(--accent-teal);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 15px var(--accent-teal);
  transition: all 0.15s ease;
}

.bpm-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 25px var(--accent-teal);
}

.sequencer-section {
  margin-bottom: 30px;
}

.section-title {
  font-size: 1.1rem;
  color: var(--accent-teal);
  margin-bottom: 15px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent-teal);
  display: inline-block;
}

.sequencer-grid {
  overflow-x: auto;
  padding-bottom: 10px;
}

.grid-header,
.grid-row {
  display: flex;
  gap: 4px;
  margin-bottom: 4px;
  min-width: fit-content;
}

.instrument-label {
  width: 70px;
  min-width: 70px;
  font-weight: 700;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  color: var(--text-primary);
}

.step-number {
  width: 30px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: var(--text-muted);
  transition: all 0.1s ease;
}

.step-number.active {
  color: var(--accent-teal);
  text-shadow: 0 0 10px var(--accent-teal);
}

.step-btn {
  width: 30px;
  height: 30px;
  min-width: 30px;
  background: var(--bg-dark);
  border: 2px solid #3a3a5a;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.1s ease;
}

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

.step-btn.on {
  background: var(--accent-pink);
  border-color: var(--accent-pink);
  box-shadow: 0 0 10px rgba(255, 58, 145, 0.5);
}

.step-btn.active {
  border-color: var(--accent-teal);
  box-shadow: 0 0 15px var(--accent-teal);
  transform: scale(1.1);
}

.step-btn.on.active {
  background: var(--accent-pink);
  box-shadow: 
    0 0 15px var(--accent-teal),
    0 0 10px rgba(255, 58, 145, 0.5);
  transform: scale(1.15);
}

.pads-section {
  margin-bottom: 20px;
}

.drum-pads {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
  max-width: 300px;
  margin: 0 auto;
}

.drum-pad {
  font-family: 'Chakra Petch', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  padding: 25px;
  background: var(--bg-dark);
  border: 2px solid var(--accent-teal);
  border-radius: 12px;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.1s ease;
  box-shadow: 0 0 15px rgba(0, 224, 255, 0.2);
}

.drum-pad:hover {
  box-shadow: 0 0 25px rgba(0, 224, 255, 0.4);
}

.drum-pad:active,
.drum-pad.active {
  background: var(--accent-teal);
  color: #111;
  transform: scale(0.95);
  box-shadow: 0 0 30px var(--accent-teal);
}

.loop-counter {
  text-align: center;
  font-size: 1rem;
  color: var(--accent-teal);
  margin-top: 15px;
}

.footer {
  text-align: center;
  margin-top: auto;
  padding: 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer a {
  color: var(--accent-pink);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer a:hover {
  color: var(--accent-teal);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal {
  background: var(--bg-card);
  border-radius: 20px;
  padding: 40px;
  max-width: 400px;
  width: 100%;
  text-align: center;
  box-shadow: 
    0 0 50px rgba(59, 255, 103, 0.3),
    0 0 100px rgba(0, 224, 255, 0.2);
  animation: popIn 0.3s ease;
}

@keyframes popIn {
  from {
    transform: scale(0.8);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.modal-title {
  font-size: 1.8rem;
  color: var(--accent-green);
  margin-bottom: 30px;
  text-shadow: 0 0 20px rgba(59, 255, 103, 0.5);
}

.modal-stats {
  margin-bottom: 30px;
}

.stat {
  margin-bottom: 20px;
}

.stat-label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 5px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
}

.stat-value.pink { color: var(--accent-pink); }
.stat-value.green { color: var(--accent-green); }
.stat-value.teal { color: var(--accent-teal); }

.modal-buttons {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-modal-primary {
  background: var(--accent-teal);
  color: #111;
  box-shadow: 0 0 20px rgba(0, 224, 255, 0.4);
}

.btn-modal-secondary {
  background: var(--accent-pink);
  color: #fff;
  box-shadow: 0 0 20px rgba(255, 58, 145, 0.4);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .step-btn {
    width: 25px;
    height: 25px;
    min-width: 25px;
  }
  
  .instrument-label {
    width: 55px;
    min-width: 55px;
    font-size: 0.65rem;
  }
  
  .step-number {
    width: 25px;
    font-size: 0.6rem;
  }
}

@media (max-width: 480px) {
  .step-btn {
    width: 20px;
    height: 20px;
    min-width: 20px;
  }
  
  .instrument-label {
    width: 45px;
    min-width: 45px;
    font-size: 0.6rem;
  }
  
  .step-number {
    width: 20px;
    font-size: 0.55rem;
  }
  
  .drum-pads {
    grid-template-columns: 1fr;
    max-width: 200px;
  }
  
  .drum-pad {
    padding: 20px;
  }
  
  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
  
  .modal {
    padding: 25px;
  }
  
  .modal-buttons {
    flex-direction: column;
  }
  
  .modal-buttons .btn {
    width: 100%;
  }
}