:root {
  --bg-primary: #121214;
  --bg-secondary: #18181c;
  --bg-tertiary: #1f1f23;
  --border-color: #2e2e36;
  --accent-color: #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.35);
  --accent-secondary: #8b5cf6;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dark: #6b7280;
  --danger-color: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.3);
  --success-color: #10b981;
  --card-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.5);
  --font-sans: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

#app-container {
  display: flex;
  width: 100%;
  height: 100%;
}

/* SIDEBAR STYLING */
#sidebar {
  width: 320px;
  min-width: 320px;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow-y: auto;
  padding: 20px;
  gap: 20px;
  z-index: 10;
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--border-color);
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-color), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.5px;
}

.badge {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: 9999px;
  font-family: var(--font-mono);
}

.section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 1px;
  font-weight: 600;
}

h4 {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

/* BUTTONS & CONTROLS */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

button {
  font-family: var(--font-sans);
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  align-items: center;
  justify-content: center;
}

button:hover {
  background-color: var(--border-color);
  border-color: var(--text-dark);
}

button.active {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  box-shadow: 0 0 12px var(--accent-glow);
}

button.danger {
  background-color: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

button.danger:hover {
  background-color: var(--danger-color);
  border-color: var(--danger-color);
  color: white;
  box-shadow: 0 0 12px var(--danger-glow);
}

button.highlight {
  background-color: rgba(139, 92, 246, 0.2);
  border-color: rgba(139, 92, 246, 0.4);
  color: #c084fc;
}

button.highlight:hover {
  background-color: var(--accent-secondary);
  border-color: var(--accent-secondary);
  color: white;
}

.btn-group {
  display: flex;
  gap: 6px;
  width: 100%;
}

.btn-group button {
  flex: 1;
}

.icon-btn {
  width: 24px;
  height: 24px;
  padding: 0;
  border-radius: 4px;
  font-weight: 700;
  font-size: 1rem;
}

/* SLIDERS & FORM FIELDS */
.slider-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 8px;
}

.slider-group label {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
}

.slider-group label span {
  font-family: var(--font-mono);
  color: var(--accent-color);
  font-weight: 600;
}

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-tertiary);
  outline: none;
  border: 1px solid var(--border-color);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-color);
  cursor: pointer;
  transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* COLOR PICKER */
.color-picker-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.color-picker-group label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.color-picker-wrapper {
  display: flex;
  gap: 12px;
  align-items: center;
}

input[type="color"] {
  -webkit-appearance: none;
  border: none;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  background: none;
}

input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

input[type="color"]::-webkit-color-swatch {
  border: 2px solid var(--border-color);
  border-radius: 50%;
}

.color-presets {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.color-swatch {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid var(--border-color);
  transition: transform 0.1s;
}

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

/* SELECTION OPERATIONS PANEL */
.selection-ops-panel {
  background-color: rgba(139, 92, 246, 0.05);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 8px;
  padding: 10px;
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  animation: slideDown 0.2s cubic-bezier(0, 0, 0.2, 1);
}

.hidden {
  display: none !important;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* LAYERS PANEL */
#layers-list-container {
  display: flex;
  flex-direction: column-reverse;
  /* Bottom layers drawn at bottom of list */
  gap: 6px;
  max-height: 220px;
  overflow-y: auto;
  padding-right: 4px;
}

.layer-item {
  display: flex;
  align-items: center;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 6px 10px;
  gap: 10px;
  transition: all 0.15s ease;
}

.layer-item.active {
  border-color: var(--accent-color);
  background-color: rgba(59, 130, 246, 0.05);
}

.layer-thumb {
  width: 28px;
  height: 28px;
  background-color: #222;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
  flex-shrink: 0;
}

.layer-details {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.layer-name {
  font-size: 0.8rem;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

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

.layer-opacity-slider {
  width: 60px !important;
  height: 4px !important;
}

.layer-btn-actions {
  display: flex;
  gap: 4px;
}

.layer-action-btn {
  background: none;
  border: none;
  padding: 4px;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: 3px;
  font-size: 0.75rem;
}

.layer-action-btn:hover {
  background-color: var(--border-color);
  color: var(--text-main);
}

/* STATS */
.stats-panel {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding-top: 15px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-dark);
}

.help-text {
  font-family: var(--font-sans);
  margin-top: 6px;
  line-height: 1.4;
}

/* MAIN VIEWPORT LAYOUT */
#main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: relative;
  min-width: 0;
}

#canvas-holder {
  flex: 1;
  background-color: #171719;
  /* Checkerboard backing representation */
  background-image:
    linear-gradient(45deg, #1b1b1d 25%, transparent 25%),
    linear-gradient(-45deg, #1b1b1d 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #1b1b1d 75%),
    linear-gradient(-45deg, transparent 75%, #1b1b1d 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
  position: relative;
  overflow: hidden;
}

.viewport-overlay {
  position: absolute;
  top: 12px;
  right: 12px;
  pointer-events: none;
  z-index: 5;
}

.state-badge {
  background-color: rgba(24, 24, 28, 0.85);
  backdrop-filter: blur(8px);
  border-color: var(--accent-color);
  color: var(--accent-color);
  font-weight: 600;
  font-size: 0.8rem;
  padding: 6px 12px;
}

/* BOTTOM PANEL (TIMELINES) */
#bottom-panel {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  padding: 15px 20px;
  gap: 16px;
  z-index: 10;
  min-width: 0;
}

.timeline-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.timeline-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.timeline-stats {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dark);
}

.timeline-actions {
  display: flex;
  gap: 6px;
}

.timeline-action-btn {
  padding: 4px 8px;
  font-size: 0.75rem;
}

.timeline-track-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.timeline-slider {
  width: 100%;
  margin-bottom: 2px;
}

/* TIMELINE BLOCKS */
.timeline-blocks {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 8px;
  min-height: 60px;
  align-items: center;
}

.timeline-block {
  width: 75px;
  min-width: 75px;
  height: 48px;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
  user-select: none;
  transition: all 0.2s ease;
}

.timeline-block:hover {
  border-color: var(--text-muted);
}

.timeline-block.active {
  border-color: var(--accent-color);
  background-color: rgba(59, 130, 246, 0.1);
  box-shadow: inset 0 0 8px rgba(59, 130, 246, 0.2);
}

.timeline-block.undone {
  opacity: 0.45;
  border-style: dashed;
}

.timeline-block-text {
  font-size: 0.75rem;
  font-weight: 500;
  text-align: center;
  color: var(--text-main);
  word-break: break-all;
  padding: 0 4px;
}

.timeline-block-del {
  position: absolute;
  top: -4px;
  right: -4px;
  width: 16px;
  height: 16px;
  background-color: var(--danger-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: bold;
  opacity: 0;
  transition: opacity 0.15s;
  cursor: pointer;
}

.timeline-block:hover .timeline-block-del {
  opacity: 1;
}

/* ALL INTERACTIONS DOTS TRACK */
.all-timeline-track {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 24px;
  overflow-x: auto;
  padding: 4px 0;
  border-bottom: 1px dashed var(--border-color);
}

.all-event-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--text-dark);
  cursor: pointer;
  transition: all 0.15s ease;
  flex-shrink: 0;
  position: relative;
}

.all-event-dot:hover {
  transform: scale(1.4);
}

.all-event-dot.active {
  transform: scale(1.3);
  box-shadow: 0 0 6px currentColor;
}

.all-event-dot.undone {
  opacity: 0.3;
}

/* Color coding for event types */
.all-event-dot[data-type="major"] {
  background-color: var(--accent-color);
  width: 12px;
  height: 12px;
  border-radius: 2px;
}

.all-event-dot[data-type="mousedown"] {
  background-color: var(--success-color);
}

.all-event-dot[data-type="mousemove"] {
  background-color: #5b626e;
  width: 6px;
  height: 6px;
}

.all-event-dot[data-type="mouseup"] {
  background-color: #ef4444;
}

.all-event-dot[data-type="tool"] {
  background-color: var(--accent-secondary);
}

.all-event-dot[data-type="setting"] {
  background-color: var(--success-color);
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-dark);
}

/* SAVE STATE DOTS & TOAST */
.all-event-dot[data-type="save"] {
  background-color: var(--accent-secondary);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  box-shadow: 0 0 6px var(--accent-secondary);
}

.toast {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--success-color);
  color: white;
  padding: 8px 16px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.85rem;
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.35);
  z-index: 10002;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.toast.hidden {
  opacity: 0;
  transform: translate(-50%, -20px);
}

/* Undo Mode Switcher styling */
.undo-system-mode-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  background-color: var(--bg-tertiary);
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  margin-bottom: 4px;
}

.undo-system-mode-bar span {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.undo-mode-selector {
  display: flex;
  gap: 6px;
}

.undo-mode-selector button {
  padding: 6px 12px;
  font-size: 0.8rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
}

#canvas-holder canvas {
  cursor: none !important;
}

.timeline-container.dimmed {
  opacity: 0.25;
  pointer-events: none;
  filter: grayscale(80%);
  transition: all 0.3s ease;
}

.mode-controls-panel.hidden {
  display: none;
}

/* SETTINGS COG & MODAL STYLING */
.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.header-actions .icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  transition: all 0.2s ease;
}

.header-actions .icon-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-tertiary);
}

#btn-config-settings {
  transition: transform 0.2s ease;
}

#btn-config-settings:hover {
  transform: rotate(45deg);
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(10, 10, 12, 0.7);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100000;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.modal-overlay.hidden {
  display: none;
  opacity: 0;
  pointer-events: none;
}

.modal-content {
  background: rgba(24, 24, 28, 0.95);
  border: 1px solid var(--border-color);
  box-shadow: var(--card-shadow), 0 0 40px rgba(59, 130, 246, 0.1);
  border-radius: 12px;
  width: 1040px;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalFadeIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalFadeIn {
  from {
    transform: scale(0.9) translateY(20px);
    opacity: 0;
  }

  to {
    transform: scale(1) translateY(0);
    opacity: 1;
  }
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(31, 31, 35, 0.4);
}

.modal-header h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  transition: color 0.2s ease;
  line-height: 1;
  padding: 4px;
}

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

.modal-body {
  padding: 20px;
  overflow-y: auto;
}

.form-section {
  margin-bottom: 32px;
}

.form-section h3 {
  font-size: 0.75rem;
  color: var(--accent-color);
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(46, 46, 54, 0.5);
  padding-bottom: 4px;
}

.form-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.row {
  flex-direction: row;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-main);
}

.form-group input[type="number"],
.form-group select {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 6px;
  padding: 8px 12px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  outline: none;
  transition: all 0.2s ease;
}

.form-group input[type="number"]:focus,
.form-group select:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.form-help {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

/* SHORTCUTS MODAL STYLING */
.shortcut-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-height: 60vh;
  overflow-y: auto;
  padding-right: 8px;
}

.shortcut-section {
  margin-bottom: 8px;
}

.shortcut-section h3 {
  font-size: 0.85rem;
  color: var(--accent-color);
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(46, 46, 54, 0.5);
  padding-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.shortcut-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid rgba(46, 46, 54, 0.2);
}

.shortcut-item:last-child {
  border-bottom: none;
}

.shortcut-keys {
  display: flex;
  gap: 4px;
  align-items: center;
}

.shortcut-keys kbd {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-bottom-width: 3px;
  border-radius: 4px;
  color: var(--text-main);
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 6px;
  box-shadow: 0 1px 0 rgba(0,0,0,0.2);
}

.shortcut-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: right;
  max-width: 65%;
}

/* SAVES SECTION STYLING */
.saves-control-group {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.saves-control-group input[type="text"] {
  flex: 1;
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 0.8rem;
  outline: none;
  transition: all 0.2s;
}

.saves-control-group input[type="text"]:focus {
  border-color: var(--accent-color);
}

/* SAVES GRID MODAL STYLING */
.saves-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
  max-height: 60vh;
  overflow-y: auto;
  padding: 8px;
}

.save-card {
  background: rgba(30, 30, 35, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 120px;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.save-card:hover {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--accent-color);
  transform: translateY(-2px);
}

.save-card-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
  word-break: break-all;
}

.save-card-date {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.save-card-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 12px;
}

.save-card-delete-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.save-card-delete-btn:hover {
  color: var(--danger-color, #ef4444);
}