/* Fengshui Grandmaster - Traditional Chinese Design System */
:root {
  /* Traditional Chinese Color Palette */
  --primary: #8b4513; /* Traditional bronze - 古铜色 */
  --primary-light: #a0522d; /* Lighter bronze */
  --primary-dark: #654321; /* Darker bronze */
  --secondary: #daa520; /* Imperial gold - 金色 */
  --secondary-light: #ffd700; /* Bright gold */
  --secondary-dark: #b8860b; /* Dark gold */
  --accent: #dc143c; /* Dragon red - 中国红 */
  --accent-light: #ff4757; /* Bright red */
  --accent-dark: #a30b24; /* Dark red */
  --tertiary: #8b0000; /* Dark crimson - 暗红 */
  --quaternary: #2f4f4f; /* Dark slate - 玄武青色 */

  /* Primary backgrounds */
  --background: #f5f5dc; /* Parchment - 宣纸黄 */
  --background-paper: #fdf5e6; /* Paper texture */
  --background-parchment: #fff8dc; /* Cornsilk */
  --surface: #fbfbf8; /* Light surface */
  --surface-elevated: #ffffff; /* Elevated surfaces */

  /* Text colors with WCAG compliance */
  --text-primary: #2d1810; /* Dark brown - 7.5:1 contrast */
  --text-secondary: #5d3a1a; /* Medium brown - 6:1 contrast */
  --text-muted: #8b4513; /* Bronze text - 5:1 contrast */
  --text-light: #a0522d; /* Light bronze - 4.5:1 contrast */
  --text-on-dark: #f5f5dc; /* Parchment on dark */
  --text-on-primary: #ffffff; /* White on bronze */
  --text-on-accent: #ffffff; /* White on red */

  /* Border and separator colors */
  --border-color: #daa520; /* Gold border */
  --border-color-light: #e6c069; /* Light gold */
  --border-color-dark: #8b4513; /* Dark bronze */
  --separator-color: #d3d3d3; /* Light separator */

  /* Shadow and elevation system */
  --shadow-1: 0 1px 3px rgba(139, 69, 19, 0.12), 0 1px 2px rgba(139, 69, 19, 0.24);
  --shadow-2: 0 3px 6px rgba(139, 69, 19, 0.16), 0 3px 6px rgba(139, 69, 19, 0.23);
  --shadow-3: 0 10px 20px rgba(139, 69, 19, 0.19), 0 6px 6px rgba(139, 69, 19, 0.23);
  --shadow-4: 0 14px 28px rgba(139, 69, 19, 0.25), 0 10px 10px rgba(139, 69, 19, 0.22);
  --shadow-5: 0 19px 38px rgba(139, 69, 19, 0.3), 0 15px 12px rgba(139, 69, 19, 0.22);

  /* Traditional pattern overlays */
  --paper-texture: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="%23F5F5DC"/><path d="M0 0L100 100M20 0L100 80M40 0L100 60M60 0L100 40M80 0L100 20M0 20L80 100M0 40L60 100M0 60L40 100M0 80L20 100" stroke="%23DAA520" stroke-width="0.5" stroke-opacity="0.1"/></svg>');

  /* Typography */
  --font-family-primary: "Georgia", "Times New Roman", serif;
  --font-family-secondary: "Verdana", "Geneva", sans-serif;
  --font-family-mono: "Courier New", "Monaco", monospace;

  /* Spacing system */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;

  /* Border radius */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  --border-radius-round: 50%;

  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-base: 0.25s ease-out;
  --transition-slow: 0.35s ease-out;

  /* Z-index system */
  --z-base: 1;
  --z-elevated: 10;
  --z-floating: 100;
  --z-modal: 1000;
  --z-max: 9999;

  /* Navigation Enhancement Colors */
  --bronze: #7d5a4d; /* Softer, aged bronze */
  --gold: #b59469; /* Muted, antique gold */
  --dragon-red: #c06c5d; /* Terra cotta red */
  --jade-green: #6a8a82; /* Dusty jade green */
  --imperial-yellow: #d4af37; /* Old gold */
  --ink-black: #3a3a3a; /* Dark charcoal grey */
  --rice-paper: #f0e8d9; /* Creamy parchment */
  --lacquer-red: #a14e42; /* Muted lacquer red */
  --ancient-bronze: #8c7853; /* Greyer bronze */
  --pearl-white: #fdfbf5; /* Soft pearl white */
}

body,
html {
  width: 100%;
  height: 100vh; /* Use viewport height instead of 100% */
  margin: 0;
  padding: 0;
  background-color: var(--background);
  background-image: var(--paper-texture);
  background-attachment: fixed;
  overflow: hidden; /* No scrollbars by default for main page */
  font-family: var(--font-family-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

/* Main page (Google Maps + Luopan) should not scroll */
body.main-page,
body.main-page html {
  overflow: hidden !important; /* No scroll bars on main page */
  height: 100vh !important;
  max-height: 100vh !important;
}

/* Ensure Google Maps and canvas containers don't cause scrolling */
body.main-page #map,
body.main-page #luopan-canvas-container,
body.main-page #floorplan-container {
  overflow: hidden !important;
  max-height: 100vh !important;
}

/* Calculator and other pages should allow scrolling */
body.calculator-page,
body.calculator-page html {
  overflow: auto; /* Allow scrolling on calculator pages */
}

/* Knowledge base and other content pages */
body.knowledge-page,
body.knowledge-page html {
  overflow: auto; /* Allow scrolling on knowledge pages */
}

/* Fix for Google Maps overlays extending beyond viewport */
#t-line-horizontal,
#t-line-vertical,
#t-tool-container {
  display: none !important;
}

#luopan-container {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 500px;
  height: 500px;
  transform-origin: center;
  transform: translate(-50%, -50%);
  cursor: grab;
  z-index: 10;
  opacity: var(--luopan-opacity, 0.75);
  pointer-events: none; /* Inactive by default */
}

#luopan-container.interactive {
  pointer-events: auto; /* Active when class is present */
}

#luopan-image {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  user-select: none;
  -webkit-user-drag: none;
}

#crosshair-container,
#green-crosshair-container {
  position: absolute;
  top: 50%;
  left: 50%;
  pointer-events: none;
  z-index: 11;
}

#green-crosshair-container {
  z-index: 12;
}

#crosshair-container::before,
#crosshair-container::after,
#green-crosshair-container::before,
#green-crosshair-container::after {
  content: "";
  position: absolute;
  background-color: red;
}

#crosshair-container::before,
#green-crosshair-container::before {
  width: 1px;
  height: 300vmax;
  left: 0;
  top: -150vmax;
  transform: translateX(-50%);
}

#crosshair-container::after,
#green-crosshair-container::after {
  height: 1px;
  width: 300vmax;
  top: 0;
  left: -150vmax;
  transform: translateY(-50%);
}

#green-crosshair-container::before,
#green-crosshair-container::after {
  background-color: green;
}

#t-tool-container {
  --t-tool-color: red;
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2px;
  height: 100vmax;
  transform-origin: center center;
}

.button-link {
  composes: btn btn-outline from global;
  text-decoration: none;
}

.t-line {
  position: absolute;
  background-color: var(--t-tool-color);
}

#t-line-vertical {
  width: 2px;
  height: 100%;
  left: 50%;
  transform: translateX(-50%);
}

#t-line-vertical::after {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 12px solid blue;
}

#t-line-horizontal {
  height: 2px;
  width: 50%;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
}

/* Angle and Direction Displays - Now inside side panel */
#angle-display {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: var(--text-on-accent);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius-lg);
  font-family: var(--font-family-mono);
  font-size: 1.1em;
  margin: var(--spacing-lg) auto;
  width: fit-content;
  text-align: center;
  box-shadow: var(--shadow-2);
  border: 1px solid var(--border-color);
}

#direction-labels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: rgba(0, 0, 0, 0.1);
  border-radius: var(--border-radius-md);
}

#direction-labels div {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: var(--text-on-primary);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  font-size: 0.9em;
  text-align: center;
  box-shadow: var(--shadow-1);
}

#map {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
}

#floorplan-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: none;
  z-index: 1;
  pointer-events: none; /* Inactive by default */
}

#floorplan-container.interactive {
  pointer-events: auto; /* Active when class is present */
}

#floorplan-image {
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
}

/* NEW, CORRECTED PANEL STYLES */
#side-panel-wrapper {
  --panel-width: 320px;
  position: fixed;
  top: 0;
  right: calc(-1 * var(--panel-width)); /* Wrapper is positioned off-screen */
  width: var(--panel-width);
  height: 100%;
  z-index: 1002;
  transition: right 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  pointer-events: none; /* Pass clicks through wrapper by default */
}

#side-panel-wrapper.expanded {
  right: 0; /* Wrapper slides into view */
}

#side-panel {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--bronze) 0%, var(--ancient-bronze) 100%);
  box-shadow: -5px 0 25px rgba(139, 69, 19, 0.4);
  overflow-y: auto; /* Content inside scrolls */
  border-left: 2px solid var(--gold);
  pointer-events: auto; /* Panel is interactive */
}

#side-panel::-webkit-scrollbar {
  width: 8px;
}

#side-panel::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.1);
}

#side-panel::-webkit-scrollbar-thumb {
  background: var(--gold);
  border-radius: 4px;
}

#side-panel::-webkit-scrollbar-thumb:hover {
  background: var(--imperial-yellow);
}

#panel-handle {
  position: fixed;
  top: 50%;
  right: 0; /* Sit flush against the right edge */
  transform: translateY(-50%);
  width: 35px;
  height: 80px;
  background-color: var(--bronze);
  border-top-left-radius: 8px;
  border-bottom-left-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--pearl-white);
  font-size: 20px;
  box-shadow: 0 6px 15px rgba(139, 69, 19, 0.2);
  border: 2px solid var(--gold);
  border-right: none;
  z-index: 1003; /* Higher than the panel wrapper */
  pointer-events: auto;
  transition: right 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

#panel-handle:hover {
  background-color: var(--ancient-bronze);
  transform: translateY(-50%) scale(1.05);
}

#side-panel-wrapper.expanded + #panel-handle {
  right: 318px; /* Move handle to overlap panel border */
}

#panel-content {
  padding: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
}

/* Panel Header */
.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  background: linear-gradient(135deg, var(--lacquer-red) 0%, var(--bronze) 100%);
  color: var(--pearl-white);
  border-bottom: 2px solid var(--gold);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.panel-header h2 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--imperial-yellow);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.back-button {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--gold);
  color: var(--pearl-white);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.back-button:hover {
  background: var(--gold);
  color: var(--bronze);
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

/* Tab Container */
.tab-container {
  display: flex;
  background: rgba(0, 0, 0, 0.2);
  border: none;
  border-radius: 0;
  overflow: hidden;
}

.tab-button {
  flex: 1;
  padding: 15px 10px;
  border: none;
  background: transparent;
  color: var(--pearl-white);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  font-size: 0.9rem;
}

.tab-button::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--gold), var(--imperial-yellow));
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.tab-button:hover::before {
  opacity: 0.2;
}

.tab-button.active {
  background: var(--gold);
  color: var(--bronze);
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.3);
}

.tab-button.active::before {
  opacity: 1;
}

/* Gated Tab Styling */
.tab-button.gated-tab {
  cursor: not-allowed !important;
  opacity: 0.6 !important;
  filter: grayscale(0.8);
  position: relative;
}

.tab-button.gated-tab:hover {
  background-color: rgba(0, 0, 0, 0.1) !important;
}

.tab-button.gated-tab::after {
  content: "🔒";
  position: absolute;
  top: 5px;
  right: 5px;
  font-size: 0.7rem;
  filter: none;
  opacity: 1;
}

.tab-icon {
  margin-right: 5px;
  font-size: 1.1em;
}

/* Tab Content */
.tab-content {
  display: none;
  padding: 0;
  border: none;
  margin: 0;
  flex-grow: 1;
  background: rgba(0, 0, 0, 0.1);
}

.tab-content.active {
  display: flex;
  flex-direction: column;
}

/* Sub Tab Container */
.sub-tab-container {
  display: flex;
  margin: 15px 15px 0;
  background: rgba(0, 0, 0, 0.1);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

.sub-tab-button {
  flex: 1;
  padding: 12px 8px;
  border: none;
  background: transparent;
  color: var(--pearl-white);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}

.sub-tab-button:hover {
  background: rgba(255, 255, 255, 0.1);
}

.sub-tab-button.active {
  background: var(--gold);
  color: var(--bronze);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* Sub Tab Content */
.sub-tab-content {
  display: none;
  padding: 20px;
  animation: fadeIn 0.3s ease-in-out;
}

.sub-tab-content.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Panel Sections */
.panel-section {
  padding: 20px;
  border-bottom: 1px solid rgba(218, 165, 32, 0.3);
}

.panel-section h3 {
  margin: 0 0 15px 0;
  color: var(--imperial-yellow);
  font-weight: 600;
  font-size: 1.1rem;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.control-group {
  margin-bottom: var(--spacing-md);
}

.control-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-family: var(--font-family-primary);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
}

.control-group input[type="number"],
.control-group select,
.control-group input[type="file"],
.control-group input[type="text"] {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color-light);
  border-radius: var(--border-radius-sm);
  background-color: var(--background-paper);
  color: var(--text-primary);
  font-family: var(--font-family-secondary);
  font-size: 14px;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
  box-sizing: border-box;
}

.control-group input[type="text"] {
  width: calc(100% - var(--spacing-md) - 60px);
  margin-right: var(--spacing-sm);
}

.control-group button,
#fetch-declination,
#rotate-to-declination {
  min-width: 60px;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--primary);
  border-radius: var(--border-radius-sm);
  background-color: var(--primary);
  color: var(--text-on-primary);
  font-family: var(--font-family-primary);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-1);
}

.control-group button:hover,
#fetch-declination:hover,
#rotate-to-declination:hover {
  background-color: var(--primary-light);
  border-color: var(--primary-light);
  box-shadow: var(--shadow-2);
  transform: translateY(-1px);
}

.control-group button:active,
#fetch-declination:active,
#rotate-to-declination:active {
  background-color: var(--primary-dark);
  transform: translateY(0);
  box-shadow: var(--shadow-1);
}

.control-group input:focus,
select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(139, 69, 19, 0.2);
}

#declination {
  width: calc(100% - 135px);
  vertical-align: middle;
  margin-right: 5px;
}

#floorplan-upload-group {
  display: none;
}

/* === FENG SHUI TRADITIONAL COMPONENT SYSTEM === */

/* Button System with Traditional Design */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--border-radius-md);
  font-family: var(--font-family-primary);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-1);
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--text-on-primary);
  border: 1px solid var(--primary-dark);
}

.btn-primary:hover {
  background-color: var(--primary-light);
  box-shadow: var(--shadow-2);
  transform: translateY(-1px);
}

.btn-primary:active {
  background-color: var(--primary-dark);
  transform: translateY(0);
  box-shadow: var(--shadow-1);
}

.btn-secondary {
  background-color: var(--secondary);
  color: var(--text-on-dark);
  border: 1px solid var(--secondary-dark);
}

.btn-secondary:hover {
  background-color: var(--secondary-light);
  color: var(--text-primary);
  box-shadow: var(--shadow-2);
  transform: translateY(-1px);
}

.btn-accent {
  background-color: var(--accent);
  color: var(--text-on-accent);
  border: 1px solid var(--accent-dark);
}

.btn-accent:hover {
  background-color: var(--accent-light);
  box-shadow: var(--shadow-2);
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  background-color: var(--primary);
  color: var(--text-on-primary);
  box-shadow: var(--shadow-2);
  transform: translateY(-1px);
}

.btn-text {
  background-color: transparent;
  color: var(--text-secondary);
  box-shadow: none;
  border: 1px solid transparent;
}

.btn-text:hover {
  background-color: rgba(139, 69, 19, 0.1);
  color: var(--primary);
  box-shadow: var(--shadow-1);
}

.btn-small {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 12px;
  border-radius: var(--border-radius-sm);
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: 16px;
  border-radius: var(--border-radius-lg);
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--border-radius-round);
}

.btn-icon:hover {
  transform: scale(1.1);
}

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

.btn:disabled {
  background-color: var(--separator-color);
  color: rgba(45, 24, 16, 0.5);
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}

.btn:disabled::before {
  display: none;
}

/* Feng Shui Symbol Icons */
.fengshui-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-style: normal;
  font-weight: normal;
  font-variant: normal;
  text-transform: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Special Pocket Buttons for Controls */
.pocket-control {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.pocket-control .btn {
  flex: 1;
  min-height: 36px;
  text-align: center;
}

/* Panel Styles */
.side-panel-unit {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-md);
  background-color: var(--surface-elevated);
  border: 1px solid var(--border-color-light);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-1);
}

.panel-title {
  font-family: var(--font-family-primary);
  color: var(--primary);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  padding-bottom: var(--spacing-xs);
  border-bottom: 2px solid var(--border-color);
}

/* Form Controls */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
}

.form-control {
  width: 100%;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color-light);
  border-radius: var(--border-radius-sm);
  background-color: var(--background-paper);
  color: var(--text-primary);
  font-family: var(--font-family-secondary);
  font-size: 14px;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(139, 69, 19, 0.2);
}

.form-control:disabled {
  background-color: var(--separator-color);
  color: var(--text-muted);
  cursor: not-allowed;
}

.form-help {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: 12px;
  color: var(--text-secondary);
}

/* Error Messages */
.error-message {
  display: block;
  margin-top: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: rgba(220, 20, 60, 0.1);
  border: 1px solid var(--accent);
  border-radius: var(--border-radius-sm);
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 500;
}

.error-message::before {
  content: "⚠ ";
  margin-right: var(--spacing-xs);
}

/* Input Validation States */
.form-control:invalid,
.form-control.error {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(220, 20, 60, 0.2);
}

.form-control:valid.validated {
  border-color: #22c55e;
  box-shadow: 0 0 0 2px rgba(34, 197, 94, 0.2);
}

/* Loading Indicators */
.loading-indicator {
  display: flex;
  align-items: center;
  margin-top: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: rgba(218, 165, 32, 0.1);
  border: 1px solid var(--secondary);
  border-radius: var(--border-radius-sm);
  color: var(--secondary-dark);
  font-size: 12px;
}

/* Progress Bar for File Uploads */
.upload-progress {
  margin-top: var(--spacing-sm);
  padding: var(--spacing-xs);
  background-color: rgba(218, 165, 32, 0.1);
  border-radius: var(--border-radius-sm);
}

.progress-bar {
  width: 100%;
  height: 4px;
  background-color: var(--separator-color);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: var(--spacing-xs);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--secondary), var(--secondary-light));
  width: 0%;
  transition: width 0.3s ease;
  border-radius: 2px;
}

.progress-text {
  font-size: 11px;
  color: var(--secondary-dark);
}

/* Success Messages */
.success-message {
  display: block;
  margin-top: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: rgba(34, 197, 94, 0.1);
  border: 1px solid #22c55e;
  border-radius: var(--border-radius-sm);
  color: #16a34a;
  font-size: 12px;
  font-weight: 500;
}

.success-message::before {
  content: "✓ ";
  margin-right: var(--spacing-xs);
}

/* Coordinate System Indicator */
.coordinate-system-indicator {
  display: flex;
  align-items: center;
  margin-top: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: rgba(34, 197, 94, 0.1);
  border: 1px solid #22c55e;
  border-radius: var(--border-radius-sm);
  color: #16a34a;
  font-size: 12px;
  animation: fadeIn 0.5s ease-in-out;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.status-indicator.pulsing {
  animation: pulse 2s infinite;
}

/* Slider Customization */
.slider-control {
  accent-color: var(--primary);
}

.slider-control:hover {
  accent-color: var(--primary-light);
}

/* Status Indicators */
.status-indicator {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  margin-right: var(--spacing-xs);
}

.status-active {
  background-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(220, 20, 60, 0.3);
}

.status-warning {
  background-color: var(--secondary);
  box-shadow: 0 0 0 2px rgba(218, 165, 32, 0.3);
}

.status-idle {
  background-color: var(--border-color-light);
}

/* Traditional Chinese Decorative Elements */
.decorative-frame {
  position: relative;
  border: 2px solid var(--primary);
  border-radius: var(--border-radius-lg);
  background: linear-gradient(135deg, transparent 10px, var(--background-paper) 10px);
  box-shadow: var(--shadow-2);
}

.decorative-frame::before,
.decorative-frame::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid var(--primary);
  border-radius: var(--border-radius-sm);
  background-color: var(--background);
}

.decorative-frame::before {
  top: -8px;
  left: -8px;
}

.decorative-frame::after {
  bottom: -8px;
  right: -8px;
}

/* Feng Shui Symbol Badges */
.symbol-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: linear-gradient(135deg, var(--secondary-light), var(--secondary));
  color: var(--text-on-dark);
  border-radius: var(--border-radius-round);
  font-size: 12px;
  font-weight: 600;
  box-shadow: var(--shadow-1);
  margin-right: var(--spacing-xs);
  margin-bottom: var(--spacing-xs);
}

.symbol-badge .symbol {
  margin-right: var(--spacing-xs);
  font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
  #side-panel {
    --panel-width: 100vw;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    top: auto;
    height: 60px;
    width: 100%;
    transform: translateY(0);
    border-left: none;
    border-top: 2px solid var(--gold);
    transition: height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  }

  #side-panel.expanded {
    height: 80vh;
    transform: translateY(0); /* Ensure it stays in place when expanded */
  }

  #panel-handle {
    left: 50%;
    top: -35px;
    transform: translateX(-50%);
    width: 70px;
    height: 35px;
    border-radius: 10px 10px 0 0;
    border: 1px solid var(--gold);
    border-bottom: none;
  }

  #panel-handle::before {
    content: "⌄";
    font-size: 20px;
  }

  #side-panel.expanded #panel-handle::before {
    content: "⌃";
  }

  .btn {
    font-size: 13px;
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .btn-large {
    font-size: 15px;
    padding: var(--spacing-sm) var(--spacing-md);
  }

  :root {
    --spacing-md: 12px;
    --spacing-lg: 18px;
    --spacing-xl: 24px;
  }

  /* Mobile-specific input improvements */
  .control-group input[type="number"],
  .control-group select,
  .control-group input[type="text"] {
    font-size: 16px; /* Prevent zoom on iOS */
    padding: var(--spacing-md);
  }

  .input-group {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .input-group input[type="text"],
  .input-group input[type="number"] {
    border-radius: var(--border-radius-sm);
    width: 100%;
  }

  .input-group button {
    border-radius: var(--border-radius-sm);
    align-self: stretch;
  }

  /* Larger touch targets */
  button,
  .btn,
  input[type="range"] {
    min-height: 44px;
    min-width: 44px;
  }

  /* Improve direction labels for mobile */
  #direction-labels {
    position: fixed;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    transform: none;
    font-size: 12px;
    padding: var(--spacing-sm);
    grid-gap: var(--spacing-xs);
  }

  /* Improve angle display for mobile */
  #angle-display {
    bottom: 60px; /* Above the mobile panel */
    font-size: 12px;
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  /* Adjust luopan size for mobile */
  #luopan-container {
    width: 300px;
    height: 300px;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-xs: 2px;
    --spacing-sm: 6px;
    --spacing-md: 8px;
  }

  .btn {
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  /* Even smaller luopan on very small screens */
  #luopan-container {
    width: 250px;
    height: 250px;
  }

  /* Stack control buttons vertically */
  .control-buttons {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  /* Smaller direction labels */
  #direction-labels {
    font-size: 10px;
    padding: var(--spacing-xs);
    grid-template-columns: 1fr 1fr;
    min-width: unset;
  }

  #direction-labels > div {
    padding: 2px 4px;
    font-size: 10px;
  }

  #angle-display {
    font-size: 10px;
    min-width: unset;
    padding: var(--spacing-xs);
  }
}

/* Enhanced keyboard navigation */
@media (pointer: fine) {
  /* Desktop/mouse users */
  .btn:focus-visible,
  input:focus-visible,
  select:focus-visible {
    outline: 2px solid var(--secondary);
    outline-offset: 2px;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --border-color: #000;
    --border-color-light: #333;
    --text-primary: #000;
    --text-secondary: #333;
  }
}

/* Enhanced High Contrast Mode */
.high-contrast {
  --background: #000000 !important;
  --background-paper: #111111 !important;
  --surface: #1a1a1a !important;
  --surface-elevated: #222222 !important;
  --text-primary: #ffffff !important;
  --text-secondary: #cccccc !important;
  --primary: #ffff00 !important;
  --primary-light: #ffff66 !important;
  --secondary: #00ffff !important;
  --accent: #ff0000 !important;
  --border-color: #ffffff !important;
  --border-color-light: #888888 !important;
}

.high-contrast button,
.high-contrast input,
.high-contrast select {
  border: 3px solid var(--border-color) !important;
  background: var(--surface) !important;
  color: var(--text-primary) !important;
}

.high-contrast button:hover,
.high-contrast button:focus {
  background: var(--primary) !important;
  color: #000000 !important;
  border-color: var(--primary) !important;
}

.high-contrast .visual-controls {
  border: 3px solid var(--border-color) !important;
  background: var(--surface-elevated) !important;
}

.high-contrast canvas {
  filter: contrast(200%) brightness(150%) !important;
}
\n/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --background: #2d1810;
    --background-paper: #3d2820;
    --surface: #2a1f15;
    --surface-elevated: #3d2820;
    --text-primary: #f5f5dc;
    --text-secondary: #d4c4a0;
    --text-on-dark: #f5f5dc;
  }

  body,
  html {
    background-color: var(--background);
    color: var(--text-primary);
  }
}

/* Progressive Disclosure System */
:root {
  --transition-speed: 0.3s;
  --transition-ease: cubic-bezier(0.4, 0, 0.2, 1);
  --disclosure-bg: linear-gradient(145deg, #3a3a3a, #2a2a2a);
  --disclosure-border: 1px solid rgba(218, 165, 32, 0.3);
  --disclosure-shadow: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
}

/* Level 1: Always Visible */
.level-1 {
  display: block;
  opacity: 1;
  max-height: none;
  overflow: visible;
  transition: all var(--transition-speed) var(--transition-ease);
}

/* Level 2: Contextual (hover/focus-driven) */
.level-2 {
  display: none;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-speed) var(--transition-ease);
  background: var(--disclosure-bg);
  border: var(--disclosure-border);
  border-radius: 6px;
  box-shadow: var(--disclosure-shadow);
  padding: 8px;
  margin: 4px 0;
}

.level-2-trigger:hover + .level-2,
.level-2-trigger:focus + .level-2,
.level-2:hover,
.level-2.active {
  display: block;
  opacity: 1;
  max-height: 200px;
}

/* Level 3: Accordion (click-driven) */
.level-3 {
  display: none;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: all var(--transition-speed) var(--transition-ease);
}

.level-3.active,
.level-3.accordion-open {
  display: block;
  opacity: 1;
  max-height: 500px;
  transition: all var(--transition-speed) var(--transition-ease);
}

/* Accordion Headers */
.accordion-header {
  background: var(--disclosure-bg);
  border: var(--disclosure-border);
  border-radius: 6px 6px 0 0;
  padding: 12px 16px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-speed) var(--transition-ease);
}

.accordion-header:hover {
  background: linear-gradient(145deg, #4a4a4a, #3a3a3a);
  border-color: rgba(218, 165, 32, 0.5);
}

.accordion-header .indicator {
  font-size: 12px;
  transition: transform var(--transition-speed) var(--transition-ease);
  color: var(--secondary);
}

.accordion-header[aria-expanded="true"] .indicator {
  transform: rotate(180deg);
}

/* Accordion Content */
.accordion-content {
  background: rgba(50, 50, 50, 0.95);
  border: var(--disclosure-border);
  border-top: none;
  border-radius: 0 0 6px 6px;
  padding: 16px;
  transition: all var(--transition-speed) var(--transition-ease);
}

/* Skill-based Modes */
.beginner-mode .level-2,
.beginner-mode .level-3 {
  display: none !important;
}

.intermediate-mode .level-3:not(.essential) {
  display: none !important;
}

.expert-mode .level-1,
.expert-mode .level-2,
.expert-mode .level-3 {
  display: block;
  opacity: 1;
  max-height: none;
}

/* Visual Indicators */
.disclosure-indicator {
  position: relative;
  display: inline-block;
  width: 16px;
  height: 16px;
  margin-left: 8px;
  transition: all var(--transition-speed) var(--transition-ease);
}

.disclosure-indicator::before {
  content: "▼";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--secondary);
  font-size: 12px;
  transition: transform var(--transition-speed) var(--transition-ease);
}

.disclosure-indicator.expanded::before {
  transform: translate(-50%, -50%) rotate(180deg);
}

.disclosure-indicator.contextual::before {
  content: "◆";
  font-size: 8px;
}

.disclosure-indicator.locked::before {
  content: "🔒";
  font-size: 10px;
}

/* Control Groups with Disclosure */
.control-group.level-1 {
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.control-group.level-1:last-child {
  border-bottom: none;
}

.control-group.level-2 {
  padding-left: 12px;
  border-left: 3px solid var(--accent);
  margin-left: 8px;
}

.control-group.level-3 {
  padding-left: 16px;
  border-left: 3px solid var(--secondary);
  margin-left: 12px;
}

/* Smooth Focus Indicators */
.level-2-trigger:focus-visible {
  outline: 2px solid var(--secondary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Animation Keyframes */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    max-height: 0;
    opacity: 0;
  }
  to {
    max-height: 500px;
    opacity: 1;
  }
}

.level-2.active,
.level-3.active {
  animation: fadeIn 0.3s var(--transition-ease);
}

.accordion-content {
  animation: slideDown 0.3s var(--transition-ease);
}

/* Smart Preview for Contextual Controls */
.contextual-preview {
  position: absolute;
  background: var(--disclosure-bg);
  border: var(--disclosure-border);
  border-radius: 4px;
  padding: 4px 8px;
  font-size: 11px;
  color: var(--secondary);
  pointer-events: none;
  z-index: 1002;
  opacity: 0;
  transform: translateY(-5px);
  transition: all var(--transition-speed) var(--transition-ease);
}

.level-2-trigger:hover .contextual-preview,
.level-2-trigger:focus .contextual-preview {
  opacity: 1;
  transform: translateY(0);
}

/* Builder-specific styles */
#ring-selection {
  margin-bottom: var(--spacing-md);
}

.select-all-container {
  margin-bottom: var(--spacing-sm);
}

#ring-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.ring-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color-light);
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--spacing-xs);
  background-color: var(--surface);
}

.ring-controls {
  display: flex;
  align-items: center;
  width: 100%;
}

.ring-checkbox {
  margin-right: var(--spacing-sm);
}

.ring-label {
  flex-grow: 1;
  padding: var(--spacing-xs) 0;
}

.edit-ring-btn {
  cursor: pointer;
  margin-left: auto;
  padding: var(--spacing-xs);
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 16px;
}

.edit-ring-btn:hover {
  color: var(--primary);
}

/* Modal styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
}

.modal-content {
  background-color: var(--surface-elevated);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-4);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-content.large-modal {
  max-width: 1200px;
  width: 95%;
  max-height: 95vh;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.modal-close {
  cursor: pointer;
  font-size: 24px;
}

.modal-body {
  margin-bottom: var(--spacing-md);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--spacing-sm);
}

/* ADDED STYLES */
.input-error {
  border-color: #dc3545 !important;
  box-shadow: 0 0 0 2px rgba(220, 53, 69, 0.25) !important;
}

@media (max-width: 480px) {
  #side-panel {
    width: 100%;
    left: -100%;
    height: 80vh; /* Don't cover full screen */
    bottom: 0;
    top: auto;
    border-top-left-radius: 15px;
    border-top-right-radius: 15px;
  }
  #side-panel.expanded {
    left: 0;
  }
  #panel-handle {
    /* Re-position handle for bottom sheet */
    top: auto;
    bottom: 80vh;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 25px;
    writing-mode: horizontal-tb;
    line-height: 25px;
    border-radius: 8px 8px 0 0;
  }
  #side-panel.expanded + #panel-handle {
    left: 50%;
  }
}

/* Modal Form Styles */
.modal-form .form-section {
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color-light);
}
.modal-form .form-section:last-child {
  border-bottom: none;
}
.modal-form label {
  font-weight: bold;
  color: var(--text-primary);
}
.modal-form input,
.modal-form select {
  width: 100%;
  padding: 0.5rem;
  margin-top: 0.25rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  background-color: var(--background-paper);
}
.modal-form small {
  display: block;
  margin-top: 0.25rem;
  color: var(--text-secondary);
  font-size: 0.8rem;
}
.char-editor {
  max-height: 200px;
  overflow-y: auto;
  padding: 0.5rem;
  border: 1px solid var(--border-color-light);
  border-radius: var(--border-radius-sm);
}
.char-editor-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}
.char-editor-row span {
  min-width: 25px;
  text-align: right;
}
.char-editor-row input[type="color"] {
  padding: 0;
  height: 30px;
  width: 50px;
}

/* Help Modal Specific Styles */
#help-modal-body {
  max-height: 70vh;
  overflow-y: auto;
  line-height: 1.6;
  padding-right: 1rem; /* For scrollbar */
}

#help-modal-body h3 {
  color: var(--primary);
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.5rem;
  margin-top: 1.5rem;
}

#help-modal-body h4 {
  color: var(--primary-dark);
  margin-top: 1rem;
}

#help-modal-body p,
#help-modal-body li {
  color: var(--text-secondary);
}

#help-modal-body code {
  background-color: var(--background-paper);
  padding: 2px 4px;
  border-radius: 4px;
  color: var(--accent-dark);
  font-family: var(--font-family-mono);
}

#help-modal-body ul {
  list-style-type: disc;
  padding-left: 20px;
}

#help-modal-body strong {
  color: var(--text-primary);
}

#help-modal-body a {
  color: var(--accent);
  text-decoration: none;
}

#help-modal-body a:hover {
  text-decoration: underline;
}

/* Enhanced Visual Controls Styles */
.visual-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin: var(--spacing-md) 0;
  padding: var(--spacing-sm) var(--spacing-md);
  background: linear-gradient(135deg, var(--surface) 0%, var(--surface-elevated) 100%);
  border: 1px solid var(--border-color-light);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-1);
}

.visual-controls label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 13px;
  margin-right: var(--spacing-sm);
  white-space: nowrap;
}

.visual-controls button {
  min-width: 32px;
  height: 32px;
  padding: var(--spacing-xs);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  background: var(--primary);
  color: var(--text-on-primary);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.visual-controls button:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-2);
}

.visual-controls button:active {
  background: var(--primary-dark);
  transform: translateY(0);
}

.visual-controls button:disabled {
  background: var(--separator-color);
  color: rgba(45, 24, 16, 0.5);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.visual-controls span {
  font-family: var(--font-family-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
  min-width: 45px;
  text-align: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--background-paper);
  border: 1px solid var(--border-color-light);
  border-radius: var(--border-radius-sm);
}

.visual-controls input[type="range"] {
  flex: 1;
  min-width: 100px;
  accent-color: var(--primary);
  cursor: pointer;
}

.visual-controls input[type="range"]::-webkit-slider-track {
  background: var(--border-color-light);
  height: 4px;
  border-radius: 2px;
}

.visual-controls input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--text-on-primary);
  cursor: pointer;
  box-shadow: var(--shadow-1);
}

.visual-controls input[type="range"]::-webkit-slider-thumb:hover {
  background: var(--primary-light);
  box-shadow: var(--shadow-2);
}

.visual-controls input[type="range"]::-moz-range-track {
  background: var(--border-color-light);
  height: 4px;
  border-radius: 2px;
  border: none;
}

.visual-controls input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--text-on-primary);
  cursor: pointer;
  box-shadow: var(--shadow-1);
}

/* Pan Controls Specific Styles */
#pan-controls .pan-buttons {
  display: grid;
  grid-template-rows: auto auto auto;
  grid-template-columns: auto auto auto;
  gap: 2px;
  align-items: center;
  justify-items: center;
}

#pan-controls .pan-buttons button {
  width: 28px;
  height: 28px;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#pan-controls button:nth-child(1) {
  /* Up */
  grid-column: 2;
  grid-row: 1;
}

#pan-controls button:nth-child(2) {
  /* Left */
  grid-column: 1;
  grid-row: 2;
}

#pan-controls button:nth-child(3) {
  /* Center */
  grid-column: 2;
  grid-row: 2;
  background: var(--secondary);
  color: var(--text-on-dark);
}

#pan-controls button:nth-child(3):hover {
  background: var(--secondary-light);
}

#pan-controls button:nth-child(4) {
  /* Right */
  grid-column: 3;
  grid-row: 2;
}

#pan-controls button:nth-child(5) {
  /* Down */
  grid-column: 2;
  grid-row: 3;
}

/* Touch gesture improvements */
.touch-enabled {
  touch-action: none; /* Prevent default touch behaviors like zoom */
}

#luopan-canvas-container.touch-enabled {
  touch-action: manipulation; /* Allow pinch-zoom and pan, prevent double-tap zoom */
}

#floorplan-container.touch-enabled {
  touch-action: manipulation;
}

/* Improved mobile navigation */
@media (max-width: 768px) {
  /* Better touch targets for mobile */
  .tab-button,
  .sub-tab-button {
    min-height: 48px;
    font-size: 16px;
    padding: 12px 16px;
  }

  /* Larger control inputs for touch */
  input[type="number"],
  input[type="text"],
  select {
    min-height: 44px;
    font-size: 16px; /* Prevent zoom on iOS */
    padding: 12px;
  }

  /* Enhanced panel handle for mobile */
  #panel-handle {
    width: 60px;
    height: 44px;
    font-size: 24px;
  }
}

/* Mobile Responsive Visual Controls */
@media (max-width: 768px) {
  .visual-controls {
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
  }

  .visual-controls label {
    font-size: 12px;
    margin-right: var(--spacing-xs);
  }

  .visual-controls button {
    min-width: 44px;
    height: 44px;
    font-size: 16px;
  }

  .visual-controls span {
    font-size: 11px;
    min-width: 55px;
    padding: var(--spacing-sm);
  }

  .visual-controls input[type="range"] {
    min-width: 120px;
  }

  #pan-controls .pan-buttons button {
    width: 44px;
    height: 44px;
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .visual-controls {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }

  .visual-controls > div {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
  }

  .visual-controls label {
    min-width: 60px;
  }
}

/* Builder styles */
.builder-category {
  margin-bottom: 25px;
  border-bottom: 1px solid var(--border-color-light);
  padding-bottom: 20px;
}

.builder-category:last-of-type {
  border-bottom: none;
  margin-bottom: 15px;
}

.builder-category-title {
  color: var(--text-primary);
  font-size: 1.1em;
  margin-bottom: 15px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--secondary);
  background: linear-gradient(135deg, var(--background-paper) 0%, var(--surface) 100%);
  padding: 10px 15px 8px 15px;
  border-radius: var(--border-radius-sm);
  box-shadow: var(--shadow-1);
}

.builder-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}

.builder-link {
  text-decoration: none;
  color: inherit;
}

.builder-card {
  padding: 15px;
  border: 1px solid #ddd;
  border-radius: 5px;
  background: white;
  transition: all 0.2s ease;
  cursor: pointer;
  position: relative;
}

.builder-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
}

.builder-edit-btn {
  background: transparent;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 4px 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 14px;
  color: #666;
  min-width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.builder-edit-btn:hover {
  background: #f0f0f0;
  border-color: #007cba;
  color: #007cba;
}

.builder-card:hover {
  border-color: #007cba;
  box-shadow: 0 2px 5px rgba(0, 124, 186, 0.1);
  transform: translateY(-1px);
}

.builder-card.disabled {
  background: #f8f9fa;
  border-color: #e9ecef;
  color: #6c757d;
  cursor: not-allowed;
  opacity: 0.7;
}

.builder-card.disabled:hover {
  border-color: #e9ecef;
  box-shadow: none;
  transform: none;
}

.builder-card.disabled .builder-title {
  color: #6c757d;
}

.builder-card.disabled .builder-description {
  color: #adb5bd;
}

.builder-title {
  font-weight: bold;
  color: #333;
  margin-bottom: 5px;
}

.builder-description {
  font-size: 12px;
  color: #666;
  line-height: 1.4;
}

/* Go board integration styles */
.builder-features {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.feature-tag {
  display: inline-block;
  background: var(--secondary-light);
  color: var(--text-primary);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 500;
  border: 1px solid var(--border-color);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.game-rules ul,
.accessibility-info ul,
.quick-start ol {
  margin: 10px 0;
  padding-left: 20px;
}

.game-rules li,
.accessibility-info li,
.quick-start li {
  margin-bottom: 6px;
  line-height: 1.4;
}

.quick-start {
  background: var(--background-paper);
  padding: 15px;
  border-radius: 6px;
  border: 1px solid var(--border-color-light);
}