/* -------------------------------------------------------------
   Design System // The Constraint Mosaic Laboratory CSS
   ------------------------------------------------------------- */

/* Variables & Tokens (Light-Theme Drafting Studio) */
:root {
  --bg-darker: #f8fafc;
  --bg-dark: #ffffff;
  --bg-panel: #f1f5f9;
  --border-color: #cbd5e1;
  --border-hover: #64748b;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  --accent-color: #0284c7; /* Blueprint Blue */
  --accent-glow: rgba(2, 132, 199, 0.15);
  --success-color: #16a34a;
  --danger-color: #dc2626;
  --warning-color: #d97706;

  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'Share Tech Mono', "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.05);
  --shadow-glow: 0 0 10px rgba(2, 132, 199, 0.25);
}

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

body {
  background-color: var(--bg-darker);
  color: var(--text-main);
  font-family: var(--font-sans);
  overflow: hidden; /* Enforce single-screen rule */
  height: 100vh;
  width: 100vw;
  display: flex;
  flex-direction: column;
}

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100%;
}

/* App Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background-color: var(--bg-dark);
  border-bottom: 2px solid #6b9ac4; /* Playful Desaturated Blueprint Blue Border */
  z-index: 10;
}

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

.logo-area h1 {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.1rem;
  font-family: var(--font-mono);
}

.accent-text {
  color: var(--accent-color);
}

.version-badge {
  font-size: 0.65rem;
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
  padding: 2px 6px;
  border-radius: var(--border-radius-sm);
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* Date-Synced Prompt Display */
.prompt-container {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: var(--bg-dark);
  border: 1px dashed var(--border-color);
  padding: 6px 14px;
  border-radius: var(--border-radius-md);
  font-size: 0.9rem;
}

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

.prompt-container .value {
  color: var(--text-main);
  font-weight: 600;
}

.sync-indicator {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--success-color);
  background-color: rgba(22, 163, 74, 0.08);
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 6px;
  letter-spacing: 0.05rem;
}

/* Toggle Switch (Watermark) */
.toggle-container {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
}

.switch {
  position: relative;
  display: inline-block;
  width: 38px;
  height: 20px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #0d1117;
  border: 1px solid #484f58;
  transition: .2s;
  border-radius: 20px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 12px;
  width: 12px;
  left: 3px;
  bottom: 3px;
  background-color: #8b949e;
  transition: .2s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: rgba(88, 166, 255, 0.25);
  border-color: var(--accent-color);
}

input:checked + .slider:before {
  transform: translateX(18px);
  background-color: var(--accent-color);
  box-shadow: 0 0 6px var(--accent-glow);
}

.status-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  width: 60px;
}

/* Constraint Profile Banner */
.profile-banner {
  padding: 10px 24px;
  background-color: var(--bg-panel);
  border-bottom: 1px solid var(--border-color);
  border-left: 5px solid #e8c37b; /* Playful Desaturated Ochre Yellow Border */
  display: flex;
  align-items: center;
  gap: 20px;
}

.profile-title-row {
  display: flex;
  flex-direction: column;
}

.profile-title-row .label {
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05rem;
}

.profile-banner h2 {
  font-size: 1.15rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-color);
  letter-spacing: 0.05rem;
}

.profile-description {
  font-size: 0.85rem;
  color: var(--text-main);
  max-width: 800px;
  line-height: 1.4;
  border-left: 2px solid var(--accent-color);
  padding-left: 14px;
}

/* Main Split Workspace */
.workspace {
  display: flex;
  flex: 1;
  overflow: hidden; /* Prevents container-level scrolling */
}

/* Canvas Section (Left) */
.canvas-section {
  flex: 7;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-color);
  background-color: var(--bg-darker);
  height: 100%;
}

.canvas-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background-color: var(--bg-panel);
  border-bottom: 1px solid var(--border-color);
  border-left: 4px solid #d98880; /* Playful Desaturated Terracotta Red Border */
  height: 36px;
}

.inventory-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background-color: var(--bg-panel);
  border-bottom: 1px solid var(--border-color);
  border-left: 4px solid #85b88f; /* Playful Desaturated Sage Green Border */
  height: 36px;
}

.panel-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05rem;
}

.lock-status-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--danger-color);
  background-color: rgba(248, 81, 73, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(248, 81, 73, 0.2);
}

.canvas-outer-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background-color: #eef1f6;
  position: relative;
  overflow: visible;
}

.canvas-container {
  width: 100%;
  max-width: 800px;
  height: 100%;
  max-height: 600px;
  aspect-ratio: 4 / 3;
  border: 1px solid #cbd5e1;
  background-color: #fdfaf2;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08), 0 1px 3px rgba(15, 23, 42, 0.03);
  position: relative;
  overflow: visible !important;
}

#canvas-svg {
  display: block;
  width: 100%;
  height: 100%;
  user-select: none;
  overflow: visible !important;
}

/* Inventory Section (Right) */
.inventory-section {
  flex: 3;
  min-width: 320px;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-dark);
  height: 100%;
}

.piece-limit-counter-container {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.highlight-value {
  color: var(--accent-color);
  font-weight: 700;
  text-shadow: 0 0 4px var(--accent-glow);
}

.inventory-table-container {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}

.inventory-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 6px;
  user-select: none;
}

.inventory-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  padding: 4px 8px;
}

.inventory-table td {
  padding: 8px;
  vertical-align: middle;
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
}

.inventory-table tr td:first-child {
  border-top-left-radius: var(--border-radius-md);
  border-bottom-left-radius: var(--border-radius-md);
}

.inventory-table tr td:last-child {
  border-top-right-radius: var(--border-radius-md);
  border-bottom-right-radius: var(--border-radius-md);
}

/* Shape Previews in Inventory */
.inventory-shape-preview {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mini-shape-svg {
  width: 24px;
  height: 24px;
}

/* Inventory Item Grids */
.inventory-slot {
  position: relative;
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-sm);
  background-color: rgba(22, 27, 34, 0.4);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  transition: border-color 0.2s, background-color 0.2s, transform 0.1s;
}

.inventory-slot:hover:not(.disabled) {
  border-color: var(--border-hover);
  background-color: rgba(22, 27, 34, 0.7);
  transform: translateY(-1px);
}

.inventory-slot:active:not(.disabled) {
  cursor: grabbing;
}

.inventory-slot.disabled {
  opacity: 0.15;
  cursor: not-allowed;
  border-color: transparent;
}

.slot-count-badge {
  position: absolute;
  bottom: -4px;
  right: -4px;
  background-color: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 0 4px;
  border-radius: 4px;
  font-weight: bold;
}

/* Tray Active highlight during drag deletes */
.inventory-section.drag-active {
  border: 2px dashed var(--accent-color);
  box-shadow: inset 0 0 15px rgba(88, 166, 255, 0.1);
  transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
}

/* Tray Hover highlight when shape pointer is hovered directly over the tray area to delete */
.inventory-section.drag-hover {
  border: 2px solid var(--danger-color) !important;
  box-shadow: inset 0 0 25px rgba(248, 81, 73, 0.25) !important;
  background-color: rgba(248, 81, 73, 0.03) !important;
}

/* Inventory Instruction card */
.inventory-instructions {
  padding: 16px;
  border-top: 1px solid var(--border-color);
  background-color: #e2e8f0; /* Lightened outer div container */
}

.instruction-card {
  padding: 12px;
  background-color: #ffffff; /* Clean white inner card for high contrast */
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
}

.instruction-card h4 {
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--accent-color);
  text-transform: uppercase;
  margin-bottom: 6px;
  letter-spacing: 0.05rem;
}

.instruction-card ul {
  list-style: none;
  font-size: 0.75rem;
  color: #000000; /* Set text to solid black for legibility */
  line-height: 1.5;
}

.instruction-card li strong {
  color: #000000; /* High contrast bold labels */
}

/* Selection Outlines / SVGs */
.svg-placed-shape {
  cursor: move;
  transition: opacity 0.15s;
}

.svg-placed-shape:hover:not(.locked) {
  filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.3));
}

.svg-placed-shape.selected {
  outline: none;
}

/* HUD Overlay Controls */
.canvas-overlay-hud {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none; /* Let pointer events fall through to SVG shapes */
  z-index: 5;
}

.shape-halo {
  position: absolute;
  border: 1px dashed var(--accent-color);
  pointer-events: none;
  box-shadow: 0 0 8px rgba(88, 166, 255, 0.2);
  transform-origin: center center;
}

.floating-shape-toolbar {
  position: absolute;
  display: flex;
  gap: 6px;
  background-color: rgba(255, 255, 255, 0.98);
  border: 1px solid var(--border-color);
  padding: 4px;
  border-radius: 20px;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
  pointer-events: auto; /* Re-enable clicks */
  transform: translate(-50%, -100%);
  margin-top: -12px;
}

.toolbar-btn {
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 0.85rem;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}

.toolbar-btn:hover {
  background-color: var(--accent-color);
  color: var(--text-inverse);
}

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

.toolbar-divider {
  width: 1px;
  height: 16px;
  background-color: var(--border-color);
  align-self: center;
}

/* App Footer */
.app-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background-color: var(--bg-dark);
  border-top: 2px solid #b294c7; /* Playful Desaturated Lavender Border */
  height: 56px;
  z-index: 10;
}

.actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

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

.status-ready {
  color: var(--success-color);
  text-shadow: 0 0 6px rgba(63, 185, 80, 0.3);
}

.status-locked {
  color: var(--danger-color);
  text-shadow: 0 0 6px rgba(248, 81, 73, 0.3);
}

/* Buttons */
.btn {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 8px 18px;
  border: 1px solid transparent;
  border-radius: var(--border-radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background-color 0.2s, transform 0.1s, box-shadow 0.2s;
}

.btn-primary {
  background-color: var(--accent-color);
  color: var(--text-inverse);
}

.btn-primary:hover:not(:disabled) {
  background-color: #0369a1;
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-primary:disabled {
  background-color: var(--bg-panel);
  border-color: var(--border-color);
  color: var(--text-muted);
  cursor: not-allowed;
}

.btn-glow:not(:disabled) {
  box-shadow: var(--shadow-glow);
}

.btn-glow:hover:not(:disabled) {
  box-shadow: 0 0 20px rgba(88, 166, 255, 0.6);
}

.btn-icon {
  font-size: 0.95rem;
}

/* Watermark Text on SVG */
.watermark-text text {
  pointer-events: none;
  font-family: var(--font-mono);
  user-select: none;
}

/* Floating ghost shape dragged */
.drag-ghost {
  position: fixed;
  pointer-events: none;
  z-index: 1000;
  opacity: 0.8;
  filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.5));
}
.drag-ghost svg {
  display: block;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg-darker);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-panel);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-hover);
}

/* Helper Utilities */
.hidden {
  display: none !important;
}