:root {
  /* Sage Green Color Palette (from projektdrewniane.com) */
  --primary: #8fa89a;
  --primary-light: #a3b8ab;
  --primary-dark: #7a9485;
  --secondary: #6b8f7a;
  --success: #7a9485;
  --warning: #c9a86c;
  --danger: #c17b7b;
  --text-primary: #3d4a47;
  --text-secondary: #5a6b65;
  --text-light: #7a8b85;
  --bg-primary: #ffffff;
  --bg-secondary: #f5f7f6;
  --bg-tertiary: #e8eeea;
  --border-color: #d1ddd6;
  --border-light: #e8eeea;
  --shadow-sm: 0 1px 2px 0 rgba(61, 74, 71, 0.08);
  --shadow-md: 0 4px 6px -1px rgba(61, 74, 71, 0.12);
  --shadow-lg: 0 10px 15px -3px rgba(61, 74, 71, 0.15);
  --shadow-xl: 0 20px 25px -5px rgba(61, 74, 71, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: linear-gradient(135deg, #f5f7f6 0%, #d9e4dd 100%);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text-primary);
}

#canvas-container {
  width: 100vw;
  height: 100vh;
  position: absolute;
  top: 0;
  left: 0;
}

@media (max-width: 768px) {
  #canvas-container {
    touch-action: pan-x pan-y pinch-zoom;
  }
}

/* Control Panel */
.control-panel {
  position: absolute;
  z-index: 100;
  background: var(--bg-primary);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 14px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-xl);
  color: var(--text-primary);
}

.control-panel::-webkit-scrollbar {
  width: 6px;
}

.control-panel::-webkit-scrollbar-track {
  background: var(--bg-secondary);
  border-radius: 10px;
}

.control-panel::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 10px;
}

.control-panel::-webkit-scrollbar-thumb:hover {
  background: var(--text-light);
}

.roof-panel {
  top: 16px;
  left: 16px;
  width: 240px;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
}

.sizing-panel {
  top: 16px;
  right: 16px;
  width: 200px;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
}

.section-title {
  margin: 0 0 10px 0;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Option Grid for Roof Type */
.option-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.option-btn {
  padding: 10px 8px;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  outline: none;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.option-icon {
  font-size: 24px;
  display: block;
}

.option-label {
  display: block;
  font-size: 11px;
  line-height: 1.2;
}

.option-btn:hover {
  border-color: var(--primary);
  background: rgba(143, 168, 154, 0.1);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.option-btn:active,
.option-btn:focus {
  border-color: var(--primary);
  background: rgba(143, 168, 154, 0.15);
  box-shadow: 0 0 0 3px rgba(143, 168, 154, 0.2);
}

.option-btn.active {
  border-color: var(--primary);
  background: var(--primary);
  color: white;
  box-shadow: var(--shadow-md);
}

/* Input Group Styling */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.input-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.input-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  color: var(--text-secondary);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
}

.dimension-input {
  flex: 1;
  padding: 8px 10px;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 12px;
  font-weight: 600;
  font-family: "Segoe UI", Roboto, sans-serif;
  outline: none;
  transition: var(--transition);
}

.dimension-input:hover {
  border-color: var(--primary);
  background: rgba(143, 168, 154, 0.05);
}

.dimension-input:focus {
  border-color: var(--primary);
  background: var(--bg-primary);
  box-shadow: 0 0 0 3px rgba(143, 168, 154, 0.2);
}

.input-unit {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0 2px;
}

.input-range {
  font-size: 10px;
  color: var(--text-light);
  font-weight: 500;
  transition: var(--transition);
}

.input-range.valid {
  color: #7a8b85;
}

.input-range.invalid {
  color: #c17b7b;
  font-weight: 600;
}

/* Toggle Group Styling */
.toggle-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toggle-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  outline: none;
  width: 100%;
}

.toggle-btn:hover {
  border-color: var(--primary);
  background: rgba(143, 168, 154, 0.1);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.toggle-btn:active,
.toggle-btn:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(143, 168, 154, 0.2);
}

.toggle-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-primary);
}

.toggle-indicator {
  width: 40px;
  height: 22px;
  border-radius: 11px;
  background: var(--border-color);
  position: relative;
  transition: var(--transition);
  flex-shrink: 0;
}

.toggle-indicator::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: white;
  top: 3px;
  left: 3px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.toggle-btn.active .toggle-indicator {
  background: var(--primary);
}

.toggle-btn.active .toggle-indicator::after {
  transform: translateX(18px);
}

/* Responsive Design for Mobile */
@media (max-width: 768px) {
  /* Control Panels - Compact and on sides */
  .control-panel {
    padding: 8px;
    border-radius: 8px;
    max-height: calc(100vh - 16px);
    overflow-y: auto;
    width: 110px;
  }

  .roof-panel {
    top: 8px;
    left: 8px;
    right: auto;
    width: 110px;
    max-height: calc(100vh - 16px);
  }

  .sizing-panel {
    top: 8px;
    right: 8px;
    left: auto;
    bottom: auto;
    width: 110px;
    max-height: calc(100vh - 16px);
  }

  /* Section Title */
  .section-title {
    font-size: 8px;
    margin-bottom: 6px;
    letter-spacing: 0.4px;
  }

  /* Option Grid - Single column, compact */
  .option-grid {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  /* Buttons - More compact */
  .option-btn {
    padding: 6px 4px;
    font-size: 9px;
    min-height: 32px;
  }

  .option-label {
    font-size: 9px;
    line-height: 1.1;
  }

  /* Toggle Buttons - More compact */
  .toggle-btn {
    padding: 6px 8px;
    min-height: 32px;
  }

  .toggle-label {
    font-size: 9px;
  }

  .toggle-indicator {
    width: 32px;
    height: 18px;
  }

  .toggle-indicator::after {
    width: 14px;
    height: 14px;
    top: 2px;
    left: 2px;
  }

  .toggle-btn.active .toggle-indicator::after {
    transform: translateX(14px);
  }

  /* Input Fields - More compact */
  .input-group {
    gap: 8px;
  }

  .input-field {
    gap: 3px;
  }

  .input-label {
    font-size: 8px;
    letter-spacing: 0.2px;
  }

  .dimension-input {
    padding: 6px 4px;
    font-size: 11px;
    min-height: 30px;
    -webkit-appearance: none;
    appearance: none;
  }

  .input-unit {
    font-size: 9px;
  }

  .input-range {
    font-size: 8px;
  }
}

/* Extra small mobile devices */
@media (max-width: 480px) {
  .control-panel {
    padding: 6px;
    width: 100px;
  }

  .roof-panel {
    top: 6px;
    left: 6px;
    width: 100px;
  }

  .sizing-panel {
    top: 6px;
    right: 6px;
    width: 100px;
  }

  .section-title {
    font-size: 7px;
    margin-bottom: 4px;
  }

  .option-btn {
    padding: 5px 3px;
    font-size: 8px;
    min-height: 28px;
  }

  .option-label {
    font-size: 8px;
  }

  .toggle-btn {
    padding: 5px 6px;
    min-height: 28px;
  }

  .toggle-label {
    font-size: 8px;
  }

  .toggle-indicator {
    width: 28px;
    height: 16px;
  }

  .toggle-indicator::after {
    width: 12px;
    height: 12px;
  }

  .toggle-btn.active .toggle-indicator::after {
    transform: translateX(12px);
  }

  .dimension-input {
    padding: 5px 3px;
    font-size: 10px;
    min-height: 26px;
  }

  .input-label {
    font-size: 7px;
  }

  .input-unit {
    font-size: 8px;
  }

  .input-range {
    font-size: 7px;
  }
}

/* Landscape mobile orientation */
@media (max-width: 768px) and (orientation: landscape) {
  .control-panel {
    padding: 6px;
    width: 120px;
  }

  .roof-panel {
    top: 6px;
    left: 6px;
    width: 120px;
    max-height: calc(100vh - 12px);
  }

  .sizing-panel {
    top: 6px;
    bottom: auto;
    right: 6px;
    width: 120px;
    max-height: calc(100vh - 12px);
  }

  .section-title {
    font-size: 8px;
    margin-bottom: 4px;
  }

  .option-grid {
    grid-template-columns: 1fr 1fr;
    gap: 4px;
  }

  .option-btn {
    padding: 5px 3px;
    font-size: 8px;
    min-height: 28px;
  }

  .option-label {
    font-size: 8px;
  }

  .toggle-btn {
    padding: 5px 6px;
    min-height: 28px;
  }

  .toggle-label {
    font-size: 8px;
  }

  .dimension-input {
    padding: 5px 3px;
    font-size: 10px;
    min-height: 26px;
  }
}