:root {
    --box-background-color: #ffffff;
    --box-padding: 16px;
    --box-width: 100%;
    --box-max-width: 1400px;
    --box-border-radius: 8px;
    --box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    --box-margin: 10px auto;

}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    margin: 0;
    background-color: #f8fafc;
    color: #1e293b;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0;
}

header {
    background-color: var(--box-background-color);
    padding: var(--box-padding);
    width: var(--box-width);
    max-width: var(--box-max-width);
    border-radius: var(--box-border-radius);
    box-shadow: var(--box-shadow);
    margin: var(--box-margin);
    position: sticky;
    top: 0;
    z-index: 1000;
}

h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
}

.disposable-section {
    background-color: var(--box-background-color);
    padding: var(--box-padding);
    border-radius: var(--box-border-radius);
    width: var(--box-width);
    max-width: var(--box-max-width);
    box-shadow: var(--box-shadow);
    margin: var(--box-margin);
    position: relative;
  }
  
  .section-content h2 {
    color: #1e293b;
    margin-top: 10;
    font-size: 1.5rem;
  }
  
  .intro-grid {
    display: flex;
    gap: 30px;
    align-items: center;
  }
  
  .intro-text {
    flex: 1;
  }
  
  .device-image {
    flex: 0 0 300px;
    text-align: center;
  }

  ol {
    padding-left: 20px;
    line-height: 1.6;
  }
  
  .tip {
    background-color: #f0f9ff;
    padding: 10px;
    border-radius: 4px;
    border-left: 3px solid #1d4ed8;
  }
  
  .purchase-btn {
    display: inline-block;
    background-color: #1d4ed8;
    color: white;
    padding: 10px 20px;
    border-radius: 4px;
    text-decoration: none;
    margin-top: 15px;
    font-weight: bold;
  }
  
  .purchase-btn:hover {
    background-color: #1e40af;
  }
  
  @media (max-width: 768px) {
    .intro-grid {
      flex-direction: column;
    }
    
    .device-image {
      flex: 1;
      width: 100%;
    }
  }

.remove-btn {
    position: absolute;
    top: 8px;
    left: 8px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: #64748b;
}

.remove-btn:hover {
    color: #1e293b;
}

.controls {
    display: flex;
    gap: 12px;
    margin-top: 16px;
    flex-wrap: wrap;
}

button {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    background-color: #2563eb;
    color: white;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #1d4ed8;
}

button:disabled {
    background-color: #94a3b8;
    cursor: not-allowed;
}

.graph-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 24px;
}

.chart-wrapper {
    background-color: var(--box-background-color);
    padding: var(--box-padding);
    border-radius: var(--box-border-radius);
    width: var(--box-width);
    max-width: var(--box-max-width);
    box-shadow: var(--box-shadow);
    margin: var(--box-margin);
    position: relative;
    transition: 1s;
}

.chart-wrapper.expanded {
    height: 600px;
}

.remove-btn, .expand-btn, .collapse-btn {
    position: absolute;
    padding: 4px;
    font-size: 1rem;
    background-color: white;
    color: black;
    border: none;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.remove-btn {
    top: 8px;
    left: 8px;
}

.remove-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.expand-btn, .collapse-btn {
    top: 8px;
    right: 8px;
}

.remove-btn:hover:not(:disabled), .expand-btn:hover, .collapse-btn:hover {
    opacity: 1;
}

.chart-wrapper .expand-btn {
    display: block;
}

.chart-wrapper .collapse-btn {
    display: none;
}

.chart-wrapper.expanded .expand-btn {
    display: none;
}

.chart-wrapper.expanded .collapse-btn {
    display: block;
}

canvas {
    width: 100% !important;
    max-width: 1368px;
    height: 200px !important;
    margin: 0 auto;
    display: block;
}

.chart-wrapper.expanded canvas {
    max-width: 1368px;
    height: 550px !important;
}

.chart-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
}

.checkboxes {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.checkboxes label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.875rem;
    color: #1e293b;
}

.chart-wrapper .save-controls {
    position: absolute;
    bottom: 8px;
    right: 16px;
    display: flex;
    gap: 8px;
}

.add-chart {
    max-width: 1400px;
    width: 100%;
    margin: 16px auto;
    text-align: center;
}

.add-chart button {
    padding: 10px 20px;
    font-size: 1rem;
}

.csv-data {
    background-color: var(--box-background-color);
    padding: 16px 16px 45px 16px;
    border-radius: var(--box-border-radius);
    width: var(--box-width);
    max-width: var(--box-max-width);
    box-shadow: var(--box-shadow);
    margin: var(--box-margin);
    position: relative;
}

.csv-header {
    font-family: 'JetBrains Mono', monospace;
    white-space: pre;
    background-color: #f1f5f9;
    padding: 12px;
    border: 1px solid #e2e8f0;
    border-bottom: none;
    border-radius: 6px 6px 0 0;
    font-size: 0.875rem;
    font-weight: 500;
}

#debugOutput {
    font-family: 'JetBrains Mono', monospace;
    white-space: pre;
    height: 200px;
    overflow-y: scroll;
    background-color: #f8fafc;
    padding: 12px;
    border: 1px solid #e2e8f0;
    border-top: none;
    border-radius: 0 0 6px 6px;
    font-size: 0.875rem;
}

.csv-data .save-controls {
    position: absolute;
    bottom: 8px;
    right: 16px;
    display: flex;
    gap: 8px;
}

.save-btn {
    padding: 6px 12px;
    font-size: 0.75rem;
    background-color: #2563eb;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s, transform 0.2s;
}

.save-btn:hover {
    background-color: #1d4ed8;
    transform: scale(1.05);
}

.save-controls input {
    padding: 6px;
    font-size: 0.75rem;
    width: 120px;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-family: 'Inter', sans-serif;
}

.status-log {
    background-color: var(--box-background-color);
    padding: var(--box-padding);
    border-radius: var(--box-border-radius);
    width: var(--box-width);
    max-width: var(--box-max-width);
    box-shadow: var(--box-shadow);
    margin: var(--box-margin);
}

#statusOutput {
    font-family: 'JetBrains Mono', monospace;
    white-space: pre-wrap;
    height: 100px;
    overflow-y: scroll;
    background-color: #f1f5f9;
    padding: 12px;
    border: 1px solid #e2e8f0;
    border-radius: 6px;
    font-size: 0.875rem;
}

.no-bluetooth-card {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.card-content {
    background-color: white;
    padding: 24px;
    border-radius: var(--box-border-radius);
    box-shadow: var(--box-shadow);
    max-width: 400px;
    width: 90%;
    text-align: center;
}

.card-content h2 {
    margin: 0 0 16px;
    font-size: 1.25rem;
    font-weight: 600;
    color: #1e293b;
}

.card-content p {
    margin: 0 0 16px;
    font-size: 0.875rem;
    color: #475569;
}

.card-content button {
    padding: 8px 16px;
    font-size: 0.875rem;
    background-color: #2563eb;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.card-content button:hover {
    background-color: #1d4ed8;
}

footer {
    background-color: var(--box-background-color);
    padding: var(--box-padding);
    border-radius: var(--box-border-radius);
    width: var(--box-width);
    max-width: var(--box-max-width);
    box-shadow: var(--box-shadow);
    margin: var(--box-margin);
    text-align: center;
    font-size: 0.875rem;
    color: #64748b;
}

@media (max-width: 1400px) {
    .container, header, .chart-wrapper, .csv-data, .status-log, footer, .add-chart {
        max-width: 100%;
    }
    canvas {
        max-width: calc(100% - 32px);
    }
    .chart-wrapper.expanded canvas {
        max-width: calc(100% - 32px);
    }
}

@media (max-width: 600px) {
    .controls, .reset-buttons {
        flex-direction: column;
        gap: 8px;
    }
    button {
        width: 100%;
    }
    .chart-wrapper .save-controls, .csv-data .save-controls {
        flex-direction: column;
        align-items: flex-end;
    }
    .card-content {
        width: 95%;
        padding: 16px;
    }
    .card-content h2 {
        font-size: 1.125rem;
    }
    .card-content p {
        font-size: 0.8125rem;
    }
}