/* ==========================================================================
   DrawAPoint — Styles (style.css)
   ========================================================================== */

/* Design Tokens & CSS Variables */
:root {
  /* Common */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --radius-dock: 16px;
  --radius-btn: 10px;
  --radius-sm: 6px;
  --radius-modal: 18px;
  
  --transition-fast: 150ms cubic-bezier(0.2, 0, 0, 1);
  --transition-normal: 250ms cubic-bezier(0.2, 0, 0, 1);

  /* Default Theme (Dark) */
  --bg-canvas: #121316;
  --grid-dot-color: #272a30;
  --grid-line-color: #1e2126;
  
  --surface-dock: rgba(24, 26, 32, 0.85);
  --surface-dock-border: rgba(45, 49, 58, 0.8);
  --surface-hover: rgba(38, 42, 51, 0.85);
  --surface-active: rgba(50, 56, 68, 0.95);
  --surface-menu: rgba(24, 26, 32, 0.96);
  
  --text-main: #f4f4f5;
  --text-muted: #a1a1aa;
  --text-subtle: #71717a;
  
  --accent-color: #38bdf8;
  --accent-hover: #0284c7;
  --accent-text: #09090b;
  --accent-surface: rgba(56, 189, 248, 0.16);
  
  --danger-color: #f87171;
  --danger-hover: #ef4444;
  --danger-text: #ffffff;
  
  --shadow-dock: 0 16px 32px -4px rgba(0, 0, 0, 0.45), 0 6px 12px -3px rgba(0, 0, 0, 0.35);
  --shadow-dropdown: 0 24px 38px -6px rgba(0, 0, 0, 0.55), 0 12px 18px -4px rgba(0, 0, 0, 0.4);
  --focus-ring: 0 0 0 2px rgba(56, 189, 248, 0.5);
  --default-stroke: #ffffff;
}

/* Light Theme (when explicitly selected) */
html.theme-light,
body.theme-light {
  --bg-canvas: #f8fafc;
  --grid-dot-color: #cbd5e1;
  --grid-line-color: #e2e8f0;
  
  --surface-dock: rgba(255, 255, 255, 0.88);
  --surface-dock-border: rgba(226, 232, 240, 0.9);
  --surface-hover: rgba(241, 245, 249, 0.9);
  --surface-active: rgba(226, 232, 240, 0.95);
  --surface-menu: rgba(255, 255, 255, 0.95);
  
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-subtle: #94a3b8;
  
  --accent-color: #3b82f6;
  --accent-hover: #2563eb;
  --accent-text: #ffffff;
  --accent-surface: rgba(59, 130, 246, 0.12);
  
  --danger-color: #ef4444;
  --danger-hover: #dc2626;
  --danger-text: #ffffff;
  
  --shadow-dock: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-dropdown: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --focus-ring: 0 0 0 2px rgba(59, 130, 246, 0.5);
  --default-stroke: #0f172a;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  width: 100%;
  height: 100%;
  min-height: 100%;
  min-height: -webkit-fill-available;
  height: 100dvh;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: var(--bg-canvas);
}

body {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  min-height: 100%;
  min-height: -webkit-fill-available;
  height: 100dvh;
  margin: 0;
  padding: 0;
  overflow: hidden;
  overscroll-behavior: none;
  font-family: var(--font-family);
  background-color: var(--bg-canvas);
  color: var(--text-main);
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
  transition-property: background-color;
  transition-duration: var(--transition-normal);
}

/* Canvas Viewport */
.canvas-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  height: 100dvh;
  background-color: var(--bg-canvas);
  overflow: hidden;
  touch-action: none;
  cursor: crosshair;
}

.canvas-container.tool-hand,
.canvas-container.panning {
  cursor: grab;
}

.canvas-container.panning:active,
.canvas-container.is-dragging {
  cursor: grabbing;
}

.canvas-container.tool-eraser {
  cursor: cell;
}

#main-canvas, #active-canvas {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  display: block;
}

#active-canvas {
  pointer-events: none;
}

/* Image Selection Overlay */
.image-selection-box {
  position: absolute;
  border: 2px solid var(--accent-color);
  border-radius: 4px;
  pointer-events: none;
  z-index: 20;
  box-sizing: border-box;
  touch-action: none;
}

.image-selection-box.hidden {
  display: none !important;
}

.selection-drag-area {
  position: absolute;
  inset: 0;
  pointer-events: auto;
  cursor: move;
  background: rgba(56, 189, 248, 0.05);
  touch-action: none;
}

.resize-handle {
  position: absolute;
  width: 12px;
  height: 12px;
  background: #ffffff;
  border: 2px solid var(--accent-color);
  border-radius: 50%;
  pointer-events: auto;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
  z-index: 25;
  touch-action: none;
  transition: transform 120ms ease;
}

.resize-handle::after {
  content: '';
  position: absolute;
  inset: -8px;
}

.resize-handle:hover {
  transform: scale(1.3);
}

.handle-nw {
  top: -6px;
  left: -6px;
  cursor: nwse-resize;
}

.handle-ne {
  top: -6px;
  right: -6px;
  cursor: nesw-resize;
}

.handle-se {
  bottom: -6px;
  right: -6px;
  cursor: nwse-resize;
}

.handle-sw {
  bottom: -6px;
  left: -6px;
  cursor: nesw-resize;
}

/* Floating Action Toolbar on Selected Image */
.selection-actions {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--surface-dock);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--surface-dock-border);
  box-shadow: var(--shadow-dock);
  padding: 4px 6px;
  border-radius: var(--radius-btn);
  pointer-events: auto;
  user-select: none;
  z-index: 30;
  white-space: nowrap;
}

.selection-dim-pill {
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--text-muted);
  padding: 0 6px;
}

.selection-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 26px;
  min-width: 26px;
  padding: 0 6px;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-main);
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 600;
  cursor: pointer;
  border: none;
  outline: none;
  pointer-events: auto;
  user-select: none;
  touch-action: manipulation;
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.selection-action-btn:hover {
  background-color: var(--surface-hover);
}

.selection-action-btn:active {
  transform: scale(0.92);
}

.selection-action-btn svg {
  pointer-events: none;
}

.selection-action-btn.btn-danger:hover {
  background-color: rgba(248, 113, 113, 0.15);
  color: var(--danger-color);
}

.selection-action-btn.btn-confirm:hover {
  background-color: rgba(34, 197, 94, 0.15);
  color: #22c55e;
}

/* Canvas container drag-over state */
.canvas-container.drag-over {
  outline: 3px dashed var(--accent-color);
  outline-offset: -8px;
}

/* Floating Toolbar */
.toolbar-dock {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  
  background: var(--surface-dock);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--surface-dock-border);
  border-radius: var(--radius-dock);
  box-shadow: var(--shadow-dock);
  
  transition-property: transform, opacity, background-color, border-color, box-shadow;
  transition-duration: var(--transition-normal);
  max-width: calc(100vw - 32px);
}

body.ui-hidden .toolbar-dock {
  transform: translate(-50%, -120%);
  opacity: 0;
  pointer-events: none;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.toolbar-divider {
  width: 1px;
  height: 22px;
  background-color: var(--surface-dock-border);
  margin: 0 3px;
  flex-shrink: 0;
}

/* Common Buttons */
button {
  font-family: inherit;
  border: none;
  background: transparent;
  color: var(--text-main);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  outline: none;
  transition-property: background-color, color, transform, border-color;
  transition-duration: var(--transition-fast);
}

button:focus-visible {
  box-shadow: var(--focus-ring);
}

button:active:not(:disabled) {
  transform: scale(0.96);
}

.tool-btn, .action-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-btn);
  color: var(--text-muted);
  position: relative;
}

.tool-btn:hover:not(:disabled),
.action-btn:hover:not(:disabled) {
  background-color: var(--surface-hover);
  color: var(--text-main);
}

.tool-btn.active {
  background-color: var(--accent-surface);
  color: var(--accent-color);
}

.action-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

.icon {
  width: 20px;
  height: 20px;
  stroke-width: 2px;
}

.icon-sm {
  width: 16px;
  height: 16px;
  stroke-width: 2px;
}

/* Color Swatches & Picker */
.color-group {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 4px;
}

.color-palette {
  display: flex;
  align-items: center;
}

.color-swatch {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: var(--swatch-color);
  position: relative;
  border: 2px solid transparent;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.15) inset;
  transition-property: transform, box-shadow, border-color;
  transition-duration: var(--transition-fast);
}

.color-swatch:hover {
  transform: scale(1.15);
}

.color-swatch.active {
  transform: scale(1.15);
  box-shadow: 0 0 0 2px var(--surface-dock), 0 0 0 4px var(--accent-color);
}

/* Custom Color Picker */
.custom-color-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.custom-color-label {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px dashed var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  transition-property: border-color, color, transform, box-shadow;
  transition-duration: var(--transition-fast);
}

.custom-color-label:hover {
  border-color: var(--text-main);
  color: var(--text-main);
  transform: scale(1.1);
}

.custom-color-label.active {
  border-style: solid;
  border-width: 2px;
  border-color: var(--accent-color);
  transform: scale(1.15);
  box-shadow: 0 0 0 2px var(--surface-dock), 0 0 0 4px var(--accent-color);
}

#custom-color-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

/* Size Selector */
.size-btn {
  width: 30px;
  height: 38px;
  border-radius: var(--radius-btn);
  display: flex;
  align-items: center;
  justify-content: center;
}

.size-btn:hover {
  background-color: var(--surface-hover);
}

.size-btn.active {
  background-color: var(--accent-surface);
}

.size-btn.active .dot-preview {
  background-color: var(--accent-color);
}

.dot-preview {
  width: var(--dot-size);
  height: var(--dot-size);
  border-radius: 50%;
  background-color: var(--text-muted);
  transition-property: background-color, transform;
  transition-duration: var(--transition-fast);
}

/* Dropdown Menu */
.dropdown-menu {
  position: fixed;
  top: 72px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 60;
  width: 270px;
  
  background: var(--surface-menu);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--surface-dock-border);
  border-radius: var(--radius-dock);
  box-shadow: var(--shadow-dropdown);
  padding: 8px;
  
  display: flex;
  flex-direction: column;
  gap: 4px;
  
  opacity: 1;
  visibility: visible;
  transition-property: opacity, transform, visibility;
  transition-duration: var(--transition-fast);
}

.dropdown-menu.hidden {
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-10px);
  pointer-events: none;
}

.menu-section {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.menu-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-subtle);
  padding: 4px 8px 2px;
  font-weight: 600;
}

.menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  text-align: left;
  color: var(--text-main);
}

.menu-item:hover {
  background-color: var(--surface-hover);
}

.menu-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  font-size: 13px;
  color: var(--text-main);
}

.menu-divider {
  height: 1px;
  background-color: var(--surface-dock-border);
  margin: 4px 0;
}

.pill-selector {
  display: flex;
  background: var(--surface-active);
  border-radius: 8px;
  padding: 2px;
  gap: 2px;
}

.pill-opt {
  font-size: 11.5px;
  padding: 3px 7px;
  border-radius: 6px;
  color: var(--text-muted);
}

.pill-opt.active {
  background-color: var(--surface-dock);
  color: var(--text-main);
  box-shadow: 0 1px 3px rgba(0,0,0,0.15);
  font-weight: 500;
}

.theme-toggle-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 6px;
  background: var(--surface-active);
  font-size: 12px;
}

.theme-icon-sun, .theme-icon-moon {
  display: none;
}

body.theme-dark .theme-icon-sun {
  display: block;
}

body:not(.theme-dark) .theme-icon-moon {
  display: block;
}

/* Zoom Widget */
.zoom-widget {
  position: fixed;
  bottom: 20px;
  bottom: max(20px, env(safe-area-inset-bottom, 20px));
  left: 20px;
  left: max(20px, env(safe-area-inset-left, 20px));
  z-index: 40;
  
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  
  background: var(--surface-dock);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--surface-dock-border);
  border-radius: var(--radius-dock);
  box-shadow: var(--shadow-dock);
  
  transition-property: transform, opacity;
  transition-duration: var(--transition-normal);
}

body.ui-hidden .zoom-widget {
  transform: translateY(120%);
  opacity: 0;
  pointer-events: none;
}

.zoom-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-btn);
  color: var(--text-muted);
}

.zoom-btn:hover {
  background-color: var(--surface-hover);
  color: var(--text-main);
}

.zoom-value-btn {
  padding: 0 8px;
  min-width: 52px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-btn);
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-main);
}

.zoom-value-btn:hover {
  background-color: var(--surface-hover);
}

.zoom-percentage {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  white-space: nowrap;
}

.zoom-ticker {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  height: 1.35em;
  line-height: 1.35em;
  overflow: hidden;
  position: relative;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.ticker-col {
  display: inline-block;
  position: relative;
  width: 1ch;
  height: 1.35em;
  line-height: 1.35em;
  overflow: hidden;
  text-align: center;
  vertical-align: middle;
  transition: width 180ms cubic-bezier(0.16, 1, 0.3, 1), opacity 180ms ease;
}

.ticker-col.is-empty {
  width: 0;
  opacity: 0;
  pointer-events: none;
}

.ticker-digit {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  will-change: transform, opacity;
  transition: transform 180ms cubic-bezier(0.16, 1, 0.3, 1), opacity 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

.ticker-digit.pos-current {
  transform: translateY(0);
  opacity: 1;
}

.ticker-digit.pos-above {
  transform: translateY(-100%);
  opacity: 0;
}

.ticker-digit.pos-below {
  transform: translateY(100%);
  opacity: 0;
}

.zoom-unit {
  display: inline-block;
  margin-left: 1px;
  line-height: 1.35em;
  user-select: none;
}

@media (prefers-reduced-motion: reduce) {
  .ticker-digit,
  .ticker-col {
    transition: none !important;
  }
}

.zoom-divider {
  width: 1px;
  height: 18px;
  background-color: var(--surface-dock-border);
  margin: 0 2px;
}

/* UI Toggle Button (Floating) */
.ui-toggles {
  position: fixed;
  bottom: 20px;
  bottom: max(20px, env(safe-area-inset-bottom, 20px));
  right: 20px;
  right: max(20px, env(safe-area-inset-right, 20px));
  z-index: 40;
}

.floating-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--surface-dock);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--surface-dock-border);
  box-shadow: var(--shadow-dock);
  color: var(--text-muted);
}

.floating-btn:hover {
  color: var(--text-main);
  background-color: var(--surface-hover);
}

/* Modals */
.modal-dialog {
  border: none;
  background: transparent;
  padding: 0;
  margin: auto;
  max-width: 460px;
  width: calc(100% - 32px);
  outline: none;
}

.modal-dialog::backdrop {
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
}

.modal-card {
  background: var(--surface-menu);
  border: 1px solid var(--surface-dock-border);
  border-radius: var(--radius-modal);
  box-shadow: var(--shadow-dropdown);
  padding: 24px;
  color: var(--text-main);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.modal-header h2 {
  font-size: 18px;
  font-weight: 600;
}

.modal-close-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

.modal-close-btn:hover {
  background-color: var(--surface-hover);
  color: var(--text-main);
}

.modal-body {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.btn-primary, .btn-secondary, .btn-danger {
  padding: 8px 16px;
  border-radius: var(--radius-btn);
  font-size: 13.5px;
  font-weight: 500;
}

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

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

.btn-secondary {
  background-color: var(--surface-active);
  color: var(--text-main);
}

.btn-secondary:hover {
  background-color: var(--surface-hover);
}

.btn-danger {
  background-color: var(--danger-color);
  color: var(--danger-text);
}

.btn-danger:hover {
  background-color: var(--danger-hover);
}

/* Shortcuts list */
.shortcut-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 360px;
  overflow-y: auto;
  padding-right: 4px;
}

.shortcut-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 0;
  border-bottom: 1px solid var(--surface-dock-border);
  gap: 12px;
}

.shortcut-label {
  font-size: 13.5px;
  color: var(--text-main);
}

.kbd-combo {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

kbd {
  font-family: var(--font-mono);
  font-size: 11.5px;
  padding: 2px 6px;
  border-radius: 5px;
  background-color: var(--surface-active);
  border: 1px solid var(--surface-dock-border);
  color: var(--text-main);
  box-shadow: 0 1px 1px rgba(0,0,0,0.1);
}

/* Toasts */
.toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--surface-dock);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--surface-dock-border);
  border-radius: var(--radius-btn);
  padding: 8px 16px;
  color: var(--text-main);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-dock);
  opacity: 0;
  transform: translateY(12px) scale(0.96);
  transition-property: opacity, transform;
  transition-duration: var(--transition-fast);
  pointer-events: auto;
}

.toast.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.hidden {
  display: none !important;
}

/* Responsive Styles */
@media (max-width: 640px) {
  .toolbar-dock {
    top: 10px;
    gap: 4px;
    padding: 4px 6px;
    overflow-x: auto;
    max-width: calc(100vw - 20px);
  }
  
  .tool-btn, .action-btn {
    width: 36px;
    height: 36px;
  }
  
  .color-group {
    gap: 14px;
    padding: 0 4px;
  }
  
  .color-swatch {
    width: 20px;
    height: 20px;
  }
  
  .size-btn {
    width: 26px;
    height: 36px;
  }
  
  .zoom-widget {
    bottom: max(12px, env(safe-area-inset-bottom, 12px));
    left: max(12px, env(safe-area-inset-left, 12px));
  }
  
  .ui-toggles {
    bottom: max(12px, env(safe-area-inset-bottom, 12px));
    right: max(12px, env(safe-area-inset-right, 12px));
  }
}