/* Styling Variables */
:root {
  --bg-darker: #0d0e12;
  --bg-dark: #14161d;
  --bg-sidebar: rgba(20, 22, 29, 0.75);
  --bg-card: rgba(255, 255, 255, 0.03);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(5, 217, 112, 0.4);
  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --primary: #05d970;
  --primary-hover: #04be61;
  --primary-glow: rgba(5, 217, 112, 0.25);
  --secondary: #272935;
  --secondary-hover: #333645;
  --accent: #fab0f4;
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --glass-blur: blur(20px);
  --font-family-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: 'Space Mono', Courier, monospace;
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family-sans);
  background-color: var(--bg-darker);
  color: var(--text-main);
  height: 100vh;
  width: 100vw;
  overflow: hidden;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Layout Container */
.app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}

/* Sidebar Styling */
.sidebar {
  width: 380px;
  min-width: 380px;
  height: 100vh;
  background-color: var(--bg-sidebar);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  z-index: 10;
  box-shadow: 10px 0 30px rgba(0, 0, 0, 0.3);
}

.app-header {
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.logo-icon {
  color: var(--primary);
  filter: drop-shadow(0 0 8px var(--primary-glow));
}

.app-header h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 0%, var(--text-muted) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.tagline {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 300;
}

/* Controls Sections */
.section {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.section-title {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.title-icon {
  color: var(--primary);
  opacity: 0.8;
}

/* Form Controls */
.control-group {
  margin-bottom: 16px;
}

.control-group:last-child {
  margin-bottom: 0;
}

label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}

/* Inputs, Selects, Buttons */
.custom-input, .custom-select {
  width: 100%;
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--text-main);
  font-family: var(--font-family-sans);
  font-size: 0.9rem;
  transition: all 0.2s ease;
  outline: none;
}

.custom-input:focus, .custom-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background-color: rgba(255, 255, 255, 0.07);
}

.custom-input.uppercase {
  text-transform: uppercase;
}

/* Grammar Rules List */
.rules-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 8px;
}

.rule-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.rule-key {
  width: 50px;
  text-align: center;
  font-family: var(--font-family-mono);
  font-weight: 700;
}

.rule-val {
  flex-grow: 1;
  font-family: var(--font-family-mono);
}

.arrow {
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* Sliders */
.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.slider-val {
  font-family: var(--font-family-mono);
  font-size: 0.8rem;
  color: var(--primary);
  background-color: rgba(5, 217, 112, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
}

.custom-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
}

.custom-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.custom-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 10px var(--primary);
}

/* Color Pickers */
.grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.color-picker-container {
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 6px 10px;
  height: 40px;
}

.custom-color-picker {
  -webkit-appearance: none;
  appearance: none;
  border: none;
  width: 28px;
  height: 24px;
  border-radius: 4px;
  cursor: pointer;
  background: none;
}

.custom-color-picker::-webkit-color-swatch-wrapper {
  padding: 0;
}

.custom-color-picker::-webkit-color-swatch {
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

.color-hex {
  font-family: var(--font-family-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Size input */
.size-input {
  height: 40px;
  padding: 6px 10px;
}

/* Checkbox Style */
.checkbox-group {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
}

.checkbox-group label {
  margin-bottom: 0;
  cursor: pointer;
  user-select: none;
}

/* Flowers Sub-panel */
.flower-options-panel {
  background-color: rgba(255, 255, 255, 0.015);
  border: 1px dashed var(--border-color);
  border-radius: 6px;
  padding: 12px;
  margin-top: 12px;
}

.flower-settings-content {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: opacity 0.2s ease;
}

.flower-settings-content.disabled {
  opacity: 0.3;
  pointer-events: none;
}

/* Action Buttons */
.action-buttons {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 6px;
  padding: 12px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  font-family: var(--font-family-sans);
  text-decoration: none;
  outline: none;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.btn-primary {
  background-color: var(--primary);
  color: #000000;
  box-shadow: 0 4px 14px var(--primary-glow);
}

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

.btn-primary:active {
  transform: translateY(0);
}

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

.btn-secondary:hover {
  background-color: var(--secondary-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn-blur {
  background: rgba(20, 22, 29, 0.6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.btn-blur:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-icon {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.btn-icon:hover {
  color: var(--danger);
  background-color: rgba(239, 68, 68, 0.1);
}

/* Stats Panel */
.stats-panel {
  margin-top: auto;
  padding: 20px 24px;
  background-color: rgba(0, 0, 0, 0.25);
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stat-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
}

.stat-lbl {
  color: var(--text-muted);
}

.stat-val {
  font-family: var(--font-family-mono);
  color: var(--text-main);
}

/* Canvas Area Panel */
.canvas-panel {
  flex-grow: 1;
  height: 100vh;
  position: relative;
  overflow: hidden;
  background-color: var(--bg-darker);
}

#drawing-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
}

#drawing-canvas:active {
  cursor: grabbing;
}

/* Overlay Elements */
.canvas-overlay {
  position: absolute;
  z-index: 5;
  pointer-events: auto;
}

.canvas-help {
  top: 20px;
  left: 20px;
  display: flex;
  gap: 8px;
  pointer-events: none; /* Let clicks pass through help labels */
}

.help-badge {
  background-color: rgba(20, 22, 29, 0.6);
  border: 1px solid var(--border-color);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  color: var(--text-muted);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.canvas-controls {
  top: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.canvas-controls .btn {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.25);
}

/* String Preview Panel bottom */
.string-preview-container {
  bottom: 20px;
  left: 20px;
  right: 20px;
  background: rgba(13, 14, 18, 0.85);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.string-preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 6px;
}

.string-preview-body {
  font-family: var(--font-family-mono);
  font-size: 0.75rem;
  color: var(--primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 4px 0;
}