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

body {
  min-height: 100vh;
  width: 100%;
  margin: 0;
  overflow: hidden;
  font-family: Arial, Helvetica, sans-serif;
  background-color: #F4F5F6;
}

.container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: row;
  background-color: #F4F5F6;
}

.if-vid {
  flex: 1;
  padding: 20px;
  overflow: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.p-head {
  font-family: Arial, Helvetica, sans-serif;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
  font-size: 18px;
  color: #333;
  align-self: flex-start;

}

.interfacing {
  position: relative;
  display: inline-block;
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
}

.interfacing img {
  width: 100%;
  height: auto;
  display: block;
}

.motor-indicator {
  position: absolute;
  top: 16%;
  left: 52.5%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  display: block;
  animation: rotateMotor 2s linear infinite;
  animation-play-state: paused;
}

.motor-indicator.rotating {
  animation-play-state: running;
}

@keyframes rotateMotor {
  from {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

.motor-shaft {
  position: absolute;
  width: 60px;
  height: 60px;
  background: radial-gradient(circle, #FF6B6B 0%, #C92A2A 100%);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 15px rgba(255, 107, 107, 0.6),
              inset 0 0 10px rgba(0, 0, 0, 0.3);
  border: 3px solid #8B0000;
}

.motor-shaft::before {
  content: '';
  position: absolute;
  width: 12px;
  height: 100%;
  background: linear-gradient(90deg, #8B0000 0%, #FF6B6B 50%, #8B0000 100%);
  left: 50%;
  top: 0;
  transform: translateX(-50%);
}

.motor-shaft::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 12px;
  background: linear-gradient(0deg, #8B0000 0%, #FF6B6B 50%, #8B0000 100%);
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.speed-lines {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
}

.speed-line {
  position: absolute;
  width: 4px;
  height: 20px;
  background: linear-gradient(180deg, #FFD93D 0%, transparent 100%);
  border-radius: 2px;
  top: 0;
  left: 50%;
  transform-origin: center 40px;
  opacity: 0.8;
}

.speed-line:nth-child(1) {
  transform: translateX(-50%) rotate(0deg);
}

.speed-line:nth-child(2) {
  transform: translateX(-50%) rotate(120deg);
}

.speed-line:nth-child(3) {
  transform: translateX(-50%) rotate(240deg);
}

#pushbutton {
  display: none;
}

.apply-code-btn {
  background-color: #667eea;
  color: white;
  margin-right: 8px;
}

.apply-code-btn:hover {
  background-color: #764ba2;
}

.apply-code-btn.code-modified {
  background-color: #ff9800;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(255, 152, 0, 0.7);
  }
  50% {
    box-shadow: 0 0 0 6px rgba(255, 152, 0, 0);
  }
}

.speed-status-bar {
  background-color: #2d2d2d;
  border-top: 2px solid #667eea;
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.status-text {
  font-size: 13px;
  color: #a0a0a0;
}

.status-text strong {
  color: #667eea;
  font-size: 16px;
  font-weight: 700;
  margin: 0 4px;
}

.status-text #speedPercentage {
  color: #888;
  font-size: 12px;
}

.status-hint {
  font-size: 12px;
  color: #888;
  font-style: italic;
}

.CodeMirror .editable-line {
  background-color: rgba(102, 126, 234, 0.15) !important;
  border-left: 3px solid #667eea;
}

.apply-icon {
  font-size: 12px;
}

.right-panel {
  width: 650px;
  display: flex;
  flex-direction: column;
  background-color: #ffffff;
  border-left: 1px solid #e0e0e0;
  overflow: hidden;
}

.instruction-box {
  flex: 0 0 50%;
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid #e0e0e0;
  overflow: hidden;
}

.box-title {
  padding: 15px 20px;
  background-color: #f8f9fa;
  border-bottom: 1px solid #e0e0e0;
  font-size: 16px;
  font-weight: 600;
  color: #333;
  margin: 0;
}

.instruction-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  font-size: 14px;
  line-height: 1.6;
  color: #555;
}

.instruction-content::-webkit-scrollbar {
  width: 8px;
}

.instruction-content::-webkit-scrollbar-track {
  background: #f1f1f1;
}

.instruction-content::-webkit-scrollbar-thumb {
  background: #888;
  border-radius: 4px;
}

.instruction-content::-webkit-scrollbar-thumb:hover {
  background: #555;
}

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

.instruction-section:last-child {
  margin-bottom: 0;
}

.instruction-section h4 {
  color: #2c3e50;
  margin-bottom: 10px;
  font-size: 15px;
  font-weight: 600;
}

.instruction-section p {
  margin-bottom: 10px;
  color: #555;
}

.instruction-section ol,
.instruction-section ul {
  margin-left: 20px;
  margin-bottom: 10px;
}

.instruction-section li {
  margin-bottom: 8px;
  line-height: 1.5;
}

.instruction-section strong {
  color: #333;
  font-weight: 600;
}

.code-box {
  flex: 0 0 50%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.code-box-header {
  padding: 15px 20px;
  background-color: #2d2d2d;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #3d3d3d;
}

.code-box-header .box-title {
  color: #ffffff;
  background: transparent;
  border: none;
  padding: 0;
  font-size: 14px;
}

.code-actions {
  display: flex;
  gap: 10px;
}

.control-btn {
  padding: 6px 14px;
  border: none;
  border-radius: 3px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.3s ease;
}

.start-btn {
  background-color: #4caf50;
  color: white;
}

.start-btn:hover {
  background-color: #45a049;
}

.stop-btn {
  background-color: #f44336;
  color: white;
}

.stop-btn:hover {
  background-color: #da190b;
}

.play-icon {
  font-size: 10px;
}

.code-btn {
  padding: 5px 12px;
  background-color: #4a4a4a;
  color: #ffffff;
  border: none;
  border-radius: 3px;
  font-size: 12px;
  cursor: pointer;
  transition: background-color 0.3s;
}

.code-btn:hover {
  background-color: #5a5a5a;
}

.code-content {
  flex: 1;
  overflow: hidden;
  background-color: #272822;
}

.code-content .CodeMirror {
  width: 100%;
  height: 100%;
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 13px;
  line-height: 1.5;
}

.code-content .CodeMirror-scroll {
  overflow-y: auto !important;
  overflow-x: auto !important;
  min-height: 100%;
}

.code-content .CodeMirror-hscrollbar {
  height: 12px !important;
}

.code-content .CodeMirror-vscrollbar {
  width: 12px !important;
}

.code-content .CodeMirror-scrollbar-filler {
  background-color: #272822;
}

.code-content .CodeMirror-hscrollbar::-webkit-scrollbar {
  height: 12px;
}

.code-content .CodeMirror-hscrollbar::-webkit-scrollbar-track {
  background: #1e1e1e;
}

.code-content .CodeMirror-hscrollbar::-webkit-scrollbar-thumb {
  background: #555;
  border-radius: 6px;
}

.code-content .CodeMirror-hscrollbar::-webkit-scrollbar-thumb:hover {
  background: #777;
}

.code-content .CodeMirror-vscrollbar::-webkit-scrollbar {
  width: 12px;
}

.code-content .CodeMirror-vscrollbar::-webkit-scrollbar-track {
  background: #1e1e1e;
}

.code-content .CodeMirror-vscrollbar::-webkit-scrollbar-thumb {
  background: #555;
  border-radius: 6px;
}

.code-content .CodeMirror-vscrollbar::-webkit-scrollbar-thumb:hover {
  background: #777;
}

#arduinoCode {
  display: none;
}

@media screen and (max-width: 1024px) {
  .container {
    flex-direction: column;
  }

  .if-vid {
    height: 50%;
    padding: 15px;
  }

  .p-head {
    margin-left: 0;
    text-align: center;
    font-size: 16px;
  }

  .right-panel {
    width: 100%;
    height: 50%;
  }

  .instruction-box,
  .code-box {
    flex: 0 0 50%;
  }

  .code-box-header {
    flex-wrap: wrap;
    gap: 10px;
  }

  .code-box-header .box-title {
    flex: 1 1 100%;
    margin-bottom: 5px;
  }
}

@media screen and (max-width: 768px) {
  .if-vid {
    padding: 10px;
    height: 45%;
  }

  .p-head {
    font-size: 14px;
    margin-left: 0;
    margin-bottom: 10px;
  }

  .interfacing {
    max-width: 100%;
  }

  .speed-control-panel {
    max-width: 100%;
    margin: 15px auto 0;
  }

  .speed-control-header {
    padding: 12px 15px;
  }

  .speed-control-header h3 {
    font-size: 14px;
  }

  .speed-display {
    font-size: 12px;
  }

  .speed-value {
    font-size: 16px;
  }

  .speed-control-content {
    padding: 15px;
  }

  .speed-note {
    font-size: 12px;
  }

  .motor-indicator {
    width: 60px;
    height: 60px;
  }

  .motor-shaft {
    width: 45px;
    height: 45px;
  }

  .speed-line {
    height: 15px;
    transform-origin: center 30px;
  }

  .right-panel {
    width: 100%;
    height: 55%;
  }

  .instruction-box {
    flex: 0 0 45%;
  }

  .code-box {
    flex: 0 0 55%;
  }

  .box-title {
    padding: 12px 15px;
    font-size: 14px;
  }

  .instruction-content {
    padding: 15px;
    font-size: 13px;
  }

  .control-btn {
    padding: 8px 12px;
    font-size: 11px;
    gap: 4px;
  }

  .code-box-header {
    padding: 10px 15px;
    flex-direction: column;
    align-items: flex-start;
  }

  .code-box-header .box-title {
    margin-bottom: 8px;
  }

  .code-actions {
    width: 100%;
    justify-content: flex-start;
  }

  .code-content .CodeMirror {
    font-size: 11px;
  }
}

@media screen and (max-width: 480px) {
  .if-vid {
    padding: 8px;
    height: 40%;
  }

  .p-head {
    font-size: 12px;
    margin-bottom: 8px;
  }

  .speed-status-bar {
    padding: 8px 12px;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .status-text {
    font-size: 12px;
  }

  .status-hint {
    font-size: 11px;
  }

  .motor-indicator {
    width: 50px;
    height: 50px;
  }

  .motor-shaft {
    width: 38px;
    height: 38px;
  }

  .motor-shaft::before {
    width: 9px;
  }

  .motor-shaft::after {
    height: 9px;
  }

  .speed-line {
    width: 3px;
    height: 12px;
    transform-origin: center 25px;
  }

  .right-panel {
    height: 60%;
  }

  .instruction-box {
    flex: 0 0 40%;
  }

  .code-box {
    flex: 0 0 60%;
  }

  .box-title {
    padding: 10px 12px;
    font-size: 13px;
  }

  .instruction-content {
    padding: 10px;
    font-size: 12px;
  }

  .instruction-section h4 {
    font-size: 13px;
  }

  .instruction-section li {
    margin-bottom: 6px;
  }

  .control-btn {
    padding: 8px 10px;
    font-size: 10px;
    gap: 3px;
  }

  .play-icon {
    font-size: 9px;
  }

  .code-box-header {
    padding: 8px 12px;
  }

  .code-box-header .box-title {
    font-size: 12px;
    margin-bottom: 6px;
  }

  .code-content .CodeMirror {
    font-size: 10px;
  }
}