:root {
  --bg-color: #0b0f14;
  --card-bg: #121826;
  --text-color: #e0e0e0;
  --primary-btn: #007bff;
  --btn-radius: 12px;
  --btn-height: 48px;
}

body {
  background-color: var(--bg-color) !important;
  color: var(--text-color) !important;
}

/* Dark Theme overrides */
#settings, #capture, .content {
  background-color: var(--bg-color) !important;
  color: var(--text-color) !important;
}

/* Common Card Style */
.card-panel {
  background-color: var(--card-bg);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

/* Buttons */
.btn, .demo-button {
  height: var(--btn-height);
  border-radius: var(--btn-radius) !important;
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
}

.btn-primary, .demo-button.next {
  background: var(--primary-btn) !important;
  border: none;
  font-weight: 600;
  width: 100%; /* Full width on mobile mostly */
  max-width: 400px;
}

/* Mobile overrides */
@media (max-width: 768px) {
  /* Hide stepper on mobile */
  .bs-stepper-header {
    display: none !important; 
  }
  
  /* Mobile Header */
  .mobile-header {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 50px;
    background: linear-gradient(180deg, #1a2236 0%, #121826 100%);
    margin-bottom: 10px;
    font-weight: 700;
    font-size: 18px;
    color: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    letter-spacing: 0.5px;
  }

  /* --- SETTINGS PAGE --- */
  #settings .center-content {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding-bottom: 80px; /* Space for sticky button */
    padding-left: 10px;
    padding-right: 10px;
  }

  /* Video Container */
  #webcam {
    width: 100%;
    max-width: 100%;
    position: relative;
    overflow: hidden;
    border-radius: 12px;
    background: #000;
    margin-bottom: 16px;
    min-height: 200px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  }

  #webcam video {
    width: 100% !important;
    height: auto !important;
    max-height: 45vh;
    object-fit: cover;
  }

  /* Controls Area */
  .control-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 16px;
    width: 100%;
  }

  .control-buttons .btn {
    width: 100%;
    margin: 0 !important;
    background: #2a3441;
    border: 1px solid #3e4c5e;
    color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    transition: background 0.2s;
  }
  
  .control-buttons .btn:active {
    background: #3e4c5e;
    transform: translateY(1px);
  }

  /* Camera Source */
  .select-wrapper {
    margin-bottom: 20px;
    background: var(--card-bg);
    padding: 12px;
    border-radius: 12px;
  }

  select#videoSource {
    width: 100%;
    height: 44px;
    background: #2a3441;
    color: white;
    border: 1px solid #3e4c5e;
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 10px;
    padding-left: 10px;
  }

  /* Sticky Bottom Button */
  .sticky-bottom {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 16px;
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
    background: rgba(18, 24, 38, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    border-top: 1px solid #2a3441;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.3);
  }

  /* --- CAPTURE PAGE --- */
  #capture {
    padding-bottom: 120px !important;
    overflow-x: hidden;
    width: 100vw; /* Prevent horizontal scroll */
    max-width: 100%;
    box-sizing: border-box;
  }
  
  /* Prevent horizontal scroll globally on mobile */
  body, html {
    overflow-x: hidden;
    width: 100%;
  }

  #capture .full-strecth-flex-horizontal {
    flex-direction: column !important;
    height: auto !important;
    display: flex !important;
    width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
  }

  /* Preview Container */
  #sidebar {
    width: 100% !important;
    margin: 0 !important;
    padding: 10px !important;
    height: auto !important;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-sizing: border-box;
  }
  
  /* Force display hidden-phone elements */
  #sidebar .hidden-phone {
    display: block !important;
    width: 100%;
  }
  
  /* Preview Canvas */
  #sidebar canvas#preview {
    width: 100% !important;
    height: auto !important;
    min-height: 150px;
    max-height: 30vh;
    background: #000;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
  }

  /* Toolbar adjustments */
  #sidebar .toolbar {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 16px 0 20px 0 !important;
    width: 100%;
    margin-left: 0 !important;
    box-sizing: border-box;
  }
  
  #sidebar .toolbar .btn {
    flex: 1;
    background: #2a3441;
    border: 1px solid #3e4c5e;
    color: white;
  }

  /* Right Side (Graph & History) */
  #capture-phase-right {
    width: 100% !important;
    margin: 0 !important;
    padding: 0 10px !important;
    box-sizing: border-box;
  }
  
  #capture-phase-right > div {
    width: 100% !important;
    margin: 0 !important;
    box-sizing: border-box;
  }

  /* Graph Controls (RGB Mode etc) */
  #capture-phase-right .toolbar {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 10px;
    width: 100%;
    box-sizing: border-box;
  }

  /* Graph */
  #graph {
    width: 100% !important;
    height: 30vh !important; /* 28-32vh */
    min-height: 200px;
    margin: 10px 0 !important;
    background: #0b0f14; /* Visualize area */
    border-radius: 8px;
    /* Fix for Invalid dimensions: ensure it has width even when empty */
    min-width: 100px; 
    display: block;
    /* Ensure Flot can calculate dimensions */
    position: relative;
  }
  
  /* History Canvas */
  #canvas {
    width: 100% !important;
    height: 16vh !important; /* 14-18vh */
    min-height: 100px;
    border-radius: 8px;
    margin: 0 !important;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
  }
  
  /* Text below canvas */
  #capture-phase-right p {
    margin-left: 0 !important;
    width: 100% !important;
    font-size: 13px;
    color: #8899a6;
    margin-top: 16px;
    line-height: 1.5;
  }

  /* Capture Actions Sticky */
  .capture-actions {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 16px;
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
    background: rgba(18, 24, 38, 0.95);
    z-index: 1000;
    display: flex;
    gap: 12px;
    border-top: 1px solid #2a3441;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.3);
    backdrop-filter: blur(10px);
  }
  
  .capture-actions button {
    flex: 1;
    margin: 0 !important;
    height: 48px;
    border-radius: 12px;
    font-weight: 600;
    display: flex !important; /* Force display flex to override none */
    align-items: center;
    justify-content: center;
    visibility: visible !important;
  }

  /* Specific Button Styles in Sticky Bar */
  /* Save Button */
  .capture-actions #capture-page-next {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: white;
    border: none;
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.3);
  }

  /* Download Button */
  .capture-actions #download-spectrum {
    background: #2a3441;
    color: white;
    border: 1px solid #3e4c5e;
  }
  
  /* Hide original buttons ONLY when they are NOT inside capture-actions 
     Since we can't select "parent not capture-actions", we rely on the specific overrides above.
     The global selector below will try to hide them, but the specific selector above wins.
  */
  
  /* Hide original buttons globally, but we override specifically for .capture-actions children above */
  /* However, CSS specificity for ID selector is high. */
  /* Let's NOT use display:none !important on the ID globally. */
  
  /* Hide landing page content completely */
  #landing-page {
    display: none !important;
  }
  
  /* Hide non-active steps off-screen to preserve dimensions for Flot */
  .bs-stepper-content .content:not(.active) {
    display: block !important;
    position: absolute !important;
    left: -9999px !important;
    top: 0 !important;
    height: 0 !important;
    overflow: hidden !important;
    visibility: hidden !important;
    width: 100% !important;
  }

  /* Ensure active content is visible and stacked */
  .bs-stepper-content .content.active {
    display: flex !important;
    flex-direction: column;
    position: relative !important;
    top: auto !important;
    left: auto !important;
    width: 100% !important;
    height: auto !important;
    padding-top: 10px;
  }

  /* Hide unwanted elements */
  #heightIndicatorPrev {
    display: none !important; /* It's just a line, maybe confusing on mobile */
  }
}

/* Global Hide for Desktop (if needed) or just reset */
/* Since we moved them in JS, they are now in .capture-actions. 
   We just need to make sure they are visible there. 
   The issue before was display:none !important on the ID.
   We removed that from this file.
*/