/* Neon Color Generator CSS - Final Verified */

/* 1. CSS Variables (Strictly from SKILL.md) */
.neon-generator-container {
  /* Background colors */
  --bg-primary: #f5f5f0;
  --bg-secondary: #fff;
  --bg-section: #fff;
  
  /* Borders */
  --border-color: #333;
  
  /* Text colors */
  --text-primary: #222;
  --text-secondary: #555;
  --text-light: #666;
  
  /* Brand colors */
  --color-accent: #3498db;
  --color-success: #27ae60;
  --color-warning: #f39c12;
  --color-danger: #e74c3c;
  --color-purple: #9b59b6;
  
  /* Shadows */
  --shadow-sm: 2px 2px 0 rgba(0,0,0,0.1);
  --shadow-md: 4px 4px 0 rgba(0,0,0,0.15);
  --shadow-lg: 8px 8px 0 rgba(0,0,0,0.15);
  
  /* Radius */
  --radius-container: 8px;
  --radius-section: 6px;
  --radius-button: 4px;
  --radius-input: 4px;
  
  /* Input focus */
  --input-focus-bg: #fffacd;
  
  /* Copy button */
  --copy-btn-bg: #fff;
  --copy-btn-hover-bg: #f0f0f0;
}

/* 2. Dark Mode Overrides */
.neon-generator-container.dark {
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-section: #2d2d2d;
  --border-color: #e0e0e0;
  --text-primary: #e8e8e8;
  --text-secondary: #b0b0b0;
  --text-light: #909090;
  --color-accent: #5dade2;
  --color-success: #52c77a;
  --color-warning: #f5b041;
  --color-danger: #ec7063;
  --color-purple: #af7ac5;
  
  --shadow-sm: 2px 2px 0 rgba(255,255,255,0.08);
  --shadow-md: 4px 4px 0 rgba(255,255,255,0.12);
  --shadow-lg: 8px 8px 0 rgba(255,255,255,0.12);
  
  --input-focus-bg: #3a3a3a;
  
  --copy-btn-bg: #3a3a3a;
  --copy-btn-hover-bg: #4a4a4a;
}

/* 3. System Dark Mode Auto Detection */
@media (prefers-color-scheme: dark) {
  .neon-generator-container:not(.dark):not(.light) {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-section: #2d2d2d;
    --border-color: #e0e0e0;
    --text-primary: #e8e8e8;
    --text-secondary: #b0b0b0;
    --text-light: #909090;
    --color-accent: #5dade2;
    --color-success: #52c77a;
    --color-warning: #f5b041;
    --color-danger: #ec7063;
    --color-purple: #af7ac5;
    --shadow-sm: 2px 2px 0 rgba(255,255,255,0.08);
    --shadow-md: 4px 4px 0 rgba(255,255,255,0.12);
    --shadow-lg: 8px 8px 0 rgba(255,255,255,0.12);
    --input-focus-bg: #3a3a3a;
    --copy-btn-bg: #3a3a3a;
    --copy-btn-hover-bg: #4a4a4a;
  }
}

/* 4. Global Styles */
.neon-generator-container,
.neon-generator-container *,
.neon-generator-container *::before,
.neon-generator-container *::after {
  box-sizing: border-box;
}

.neon-generator-container {
  position: relative;
  max-width: 900px; /* Optimized width */
  width: 100%;
  margin: 8px auto;
  padding: 8px;
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-container);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic', sans-serif;
  color: var(--text-primary);
  box-shadow: var(--shadow-lg);
  line-height: 1.5;
}

/* Dark Mode Toggle (8px radius verified) */
.dark-mode-toggle {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 6px 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px; 
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.15);
  font-size: 17.5px;
  font-weight: 600;
  color: var(--text-primary);
  z-index: 10;
}

.dark-mode-toggle:hover {
  transform: translate(0.5px, 0.5px);
  box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.15);
}

/* Header */
.header { margin-bottom: 12px; }
.main-title {
  margin: 0 0 4px 0;
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
}
.subtitle {
  margin: 0;
  font-size: 16px;
  color: var(--text-secondary);
}

/* 5. 2-Column Grid Layout */
.main-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

/* Sections */
.input-section, .result-section {
  background: var(--bg-section);
  padding: 8px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  box-shadow: var(--shadow-md);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-color);
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
}
.section-header svg { stroke: var(--color-accent); }

/* Inputs */
.input-group { margin-bottom: 10px; }
.input-group label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 4px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
}

.input-group input[type="text"],
.input-group select {
  width: 100%;
  padding: 7px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  background: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 18px; /* Increased font size */
  box-shadow: var(--shadow-sm);
  font-family: inherit;
}

.input-group input:focus, .input-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--input-focus-bg);
}

/* Sliders */
.slider-input {
  width: 100%;
  height: 6px;
  -webkit-appearance: none;
  appearance: none;
  background: #ddd;
  border-radius: 3px;
  outline: none;
  margin-top: 6px;
}
.slider-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 1px solid var(--border-color);
  cursor: pointer;
}
.hue-slider {
  background: linear-gradient(to right, red, yellow, lime, cyan, blue, magenta, red);
}

/* Presets */
.preset-group {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 4px;
}
.preset-btn {
  padding: 6px 2px;
  font-size: 14px;
  font-weight: 600;
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  cursor: pointer;
  border-bottom: 3px solid var(--p-color);
  transition: transform 0.1s;
}
.preset-btn:hover { transform: translateY(-2px); }

/* Checkboxes */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}
.checkbox-label {
  display: flex;
  align-items: center;
  cursor: pointer;
}
.checkbox-text {
  margin-left: 8px;
  font-size: 16px;
  color: var(--text-primary);
}
.checkbox-note { display: none; }
input[type="checkbox"]:checked ~ .checkbox-note { display: inline; }

/* Buttons */
.reset-btn {
  width: 100%;
  padding: 8px 16px;
  background: var(--color-warning);
  color: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.2);
  transition: all 0.15s;
}
.reset-btn:hover { transform: translate(0.5px, 0.5px); box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.2); }
.reset-btn:active { transform: translate(2px, 2px); box-shadow: none; }

.save-image-btn {
  width: 100%;
  padding: 8px 16px;
  margin-top: 8px;
  background: var(--color-purple);
  color: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.2);
}
.save-image-btn:hover { filter: brightness(1.05); transform: translate(0.5px, 0.5px); box-shadow: 1.5px 1.5px 0 rgba(0,0,0,0.2); }
.save-image-btn:active { transform: translate(2px, 2px); box-shadow: none; }
/* Hide save button when flicker is active */
.save-image-btn.hidden { display: none !important; }

/* Preview */
.preview-container {
  position: relative;
  margin-bottom: 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-section);
  overflow: hidden;
}
.neon-preview-box {
  background-color: #111; /* Always dark for neon visibility */
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  transition: background 0.3s;
}
.neon-preview-box:not(.wall-bg) {
  background-image: 
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 20px 20px;
}
.neon-preview-box.wall-bg {
  background-color: #0d0d0d;
  background-image: 
    linear-gradient(335deg, rgba(20, 20, 20, 1) 23px, transparent 23px),
    linear-gradient(155deg, rgba(20, 20, 20, 1) 23px, transparent 23px),
    linear-gradient(335deg, rgba(20, 20, 20, 1) 23px, transparent 23px),
    linear-gradient(155deg, rgba(20, 20, 20, 1) 23px, transparent 23px);
  background-size: 58px 58px;
  background-position: 0px 2px, 4px 35px, 29px 31px, 34px 6px;
}
.neon-element {
  font-size: 45px;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  text-align: center;
  line-height: 1.2;
  transition: all 0.2s ease;
  word-break: break-all;
  color: #fff;
}

/* Result Output */
.result-item { position: relative; }
.code-output {
  width: 100%;
  height: 140px;
  padding: 8px;
  margin-top: 4px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-input);
  color: var(--text-primary);
  font-family: 'Courier New', monospace;
  font-size: 14px;
  resize: vertical;
}
.copy-btn {
  position: absolute;
  top: 32px;
  right: 8px;
  padding: 4px 8px;
  background: var(--copy-btn-bg);
  border: 1px solid var(--border-color);
  border-radius: 3px;
  font-size: 14.5px;
  cursor: pointer;
  box-shadow: 1px 1px 0 rgba(0,0,0,0.15);
}

/* Watermark */
.watermark {
  position: absolute;
  bottom: 10px;
  right: 10px;
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.5);
  pointer-events: none;
  z-index: 5;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: 10px 16px;
  background: var(--text-primary);
  color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-button);
  font-size: 16px;
  font-weight: 500;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.3);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
}
.toast.show { opacity: 1; visibility: visible; transform: translateY(-5px); }
.toast.success { background: var(--color-success); color: #fff; }
.toast.error { background: var(--color-danger); color: #fff; }
.toast.info { background: var(--color-accent); color: #fff; }

/* Responsive */
@media (max-width: 768px) {
  .main-grid { grid-template-columns: 1fr; gap: 6px; }
  .neon-generator-container { margin: 6px 5px; padding: 7px; width: calc(100% - 10px); }
  .neon-element { font-size: 32px; }
}

/* Flicker Animation */
@keyframes neon-flicker {
  0%, 18%, 22%, 25%, 53%, 57%, 100% { opacity: 1; }
  20%, 24%, 55% { opacity: 0.5; }
}
.neon-flicker-active { animation: neon-flicker 1.5s infinite alternate; }