@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

/* ── Theme Variables ── */

:root {
  --bg: #111;
  --text: #ccc;
  --heading: #fff;
  --canvas-bg: #0a0a0a;
  --panel-bg: #1a1a1a;
  --border: #2a2a2a;
  --border-light: #222;
  --input-bg: #222;
  --input-bg-alt: #252525;
  --input-border: #333;
  --input-border-hover: #555;
  --label: #888;
  --muted: #666;
  --section-title: #555;
  --slider-track: #333;
  --slider-thumb: #888;
  --slider-thumb-hover: #bbb;
  --card-bg: #1f1f1f;
  --card-hover: #252525;
  --accent: #6a8fff;
  --accent-bg: #2a3a5a;
  --danger-bg: #3a2020;
  --danger-border: #663333;
  --danger-text: #ff8888;
  --hint-color: #444;
  --hint-icon: 0.3;
  --drop-bg: rgba(80, 160, 255, 0.1);
  --drop-border: rgba(80, 160, 255, 0.5);
  --drop-text: #7bc0ff;
  --scrollbar: #333;
  --res-color: #8ab4f8;
  --progress-track: #2a2a2a;
}

body.light {
  --bg: #f0f0f0;
  --text: #333;
  --heading: #111;
  --canvas-bg: #e0e0e0;
  --panel-bg: #ffffff;
  --border: #ddd;
  --border-light: #e5e5e5;
  --input-bg: #f5f5f5;
  --input-bg-alt: #eee;
  --input-border: #ccc;
  --input-border-hover: #999;
  --label: #666;
  --muted: #888;
  --section-title: #999;
  --slider-track: #ccc;
  --slider-thumb: #888;
  --slider-thumb-hover: #555;
  --card-bg: #f8f8f8;
  --card-hover: #f0f0f0;
  --accent: #3b6cff;
  --accent-bg: #e0e8ff;
  --danger-bg: #ffe0e0;
  --danger-border: #ffaaaa;
  --danger-text: #cc3333;
  --hint-color: #aaa;
  --hint-icon: 0.4;
  --drop-bg: rgba(60, 120, 255, 0.08);
  --drop-border: rgba(60, 120, 255, 0.4);
  --drop-text: #3b6cff;
  --scrollbar: #ccc;
  --res-color: #3b6cff;
  --progress-track: #ddd;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 13px;
  overflow: hidden;
  height: 100vh;
}

#app {
  display: flex;
  height: 100vh;
}

/* ── Canvas ── */

#canvas-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--canvas-bg);
  position: relative;
  overflow: hidden;
}

#canvas-container canvas {
  max-width: 100%;
  max-height: 100%;
}

.upload-hint {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--hint-color);
  font-size: 14px;
  gap: 12px;
  cursor: pointer;
}

.upload-hint svg { opacity: var(--hint-icon); }

.drop-overlay {
  position: absolute;
  inset: 0;
  background: var(--drop-bg);
  border: 2px dashed var(--drop-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  color: var(--drop-text);
  pointer-events: none;
  z-index: 100;
}

/* ── Panel ── */

#controls {
  width: 380px;
  min-width: 380px;
  background: var(--panel-bg);
  overflow-y: auto;
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

#controls::-webkit-scrollbar { width: 5px; }
#controls::-webkit-scrollbar-track { background: transparent; }
#controls::-webkit-scrollbar-thumb { background: var(--scrollbar); border-radius: 3px; }

.panel-header {
  padding: 20px 20px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.panel-header .panel-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--heading);
  letter-spacing: -0.3px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

.header-buttons {
  display: flex;
  gap: 6px;
  align-items: center;
}

.panel-header .upload-btn,
.panel-header .reset-btn {
  font-size: 12px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid var(--input-border);
  background: var(--input-bg-alt);
  color: var(--label);
  cursor: pointer;
  transition: all 0.15s;
}

.panel-header .upload-btn:hover,
.panel-header .reset-btn:hover {
  background: var(--card-hover);
  color: var(--heading);
  border-color: var(--input-border-hover);
}

.panel-header .reset-btn {
  color: #886;
  border-color: #443;
}

body.light .panel-header .reset-btn {
  color: #996;
  border-color: #cc9;
}

.panel-header .reset-btn:hover {
  color: #ffa;
  border-color: #664;
}

body.light .panel-header .reset-btn:hover {
  color: #663;
  border-color: #996;
  background: #ffc;
}

.theme-toggle {
  background: none;
  border: 1px solid var(--input-border);
  border-radius: 6px;
  padding: 5px 7px;
  cursor: pointer;
  transition: all 0.15s;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--label);
}

.theme-toggle:hover {
  border-color: var(--input-border-hover);
  background: var(--input-bg-alt);
}

/* ── Section ── */

.section {
  border-bottom: 1px solid var(--border-light);
  padding: 14px 20px;
}

.section-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--section-title);
  margin-bottom: 12px;
}

/* ── Rows ── */

.row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.row:last-child { margin-bottom: 0; }

.row label {
  width: 90px;
  min-width: 90px;
  font-size: 12px;
  color: var(--label);
}

.row input[type="range"] {
  flex: 1;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--slider-track);
  border-radius: 2px;
  outline: none;
}

.row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--slider-thumb);
  cursor: pointer;
  transition: background 0.15s;
}

.row input[type="range"]::-webkit-slider-thumb:hover {
  background: var(--slider-thumb-hover);
}

.row .val {
  width: 36px;
  text-align: right;
  font-size: 11px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.row select {
  flex: 1;
  background: var(--input-bg-alt);
  border: 1px solid var(--input-border);
  color: var(--text);
  padding: 5px 8px;
  border-radius: 5px;
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
}

.row select:hover { border-color: var(--input-border-hover); }

.row input[type="text"] {
  flex: 1;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--text);
  padding: 5px 8px;
  border-radius: 5px;
  font-size: 13px;
  font-family: inherit;
}

.row input[type="text"]:focus {
  outline: none;
  border-color: var(--input-border-hover);
}

.row input[type="color"] {
  width: 32px;
  height: 24px;
  border: 1px solid var(--input-border);
  border-radius: 4px;
  padding: 0;
  background: none;
  cursor: pointer;
}

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

/* ── Layers ── */

#layers-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.layer-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.15s;
}

.layer-card.dragging {
  opacity: 0.5;
  border-color: var(--accent);
}

.layer-card.drag-over {
  border-color: var(--accent);
  border-style: dashed;
}

.layer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  cursor: pointer;
  user-select: none;
}

.layer-head:hover { background: var(--card-hover); }

.layer-head-left {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

.layer-head-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.drag-handle {
  cursor: grab;
  color: var(--hint-color);
  font-size: 14px;
  padding: 0 2px;
}

.drag-handle:active { cursor: grabbing; }

.layer-arrows {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.layer-arrow-btn {
  background: none;
  border: none;
  color: var(--section-title);
  font-size: 8px;
  cursor: pointer;
  padding: 0 2px;
  line-height: 1;
  transition: color 0.15s;
}

.layer-arrow-btn:hover:not(:disabled) { color: var(--label); }
.layer-arrow-btn:disabled { opacity: 0.2; cursor: default; }

.layer-head .layer-name {
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layer-head .layer-shape-badge {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 10px;
  background: var(--border);
  color: var(--label);
  min-width: 28px;
  text-align: center;
}

.layer-del-btn {
  background: none;
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--section-title);
  font-size: 16px;
  line-height: 1;
  padding: 0 4px;
  cursor: pointer;
  transition: all 0.15s;
}

.layer-del-btn:hover {
  color: var(--danger-text);
  border-color: var(--danger-border);
  background: var(--danger-bg);
}

.layer-head .layer-toggle {
  width: 14px;
  height: 14px;
  accent-color: var(--accent);
}

/* ── Mode Tabs ── */

.mode-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
}

.mode-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 6px;
  border-radius: 8px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--label);
  font-family: inherit;
  font-size: 11px;
  cursor: pointer;
  transition: all 0.15s;
}

.mode-tab:hover {
  background: var(--card-hover);
  border-color: var(--input-border-hover);
  color: var(--text);
}

.mode-tab.active {
  background: var(--accent-bg);
  border-color: var(--accent);
  color: var(--heading);
}

.mode-tab-icon {
  font-size: 16px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mode-tab-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
}

.mode-panel {
  margin-bottom: 10px;
}

/* ── Text Mode Picker ── */

.text-mode-picker {
  display: flex;
  gap: 4px;
  margin-bottom: 8px;
}

.text-mode-btn {
  flex: 1;
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--label);
  font-size: 11px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}

.text-mode-btn:hover {
  background: var(--card-hover);
  border-color: var(--input-border-hover);
}

.text-mode-btn.active {
  background: var(--accent-bg);
  border-color: var(--accent);
  color: var(--heading);
}

/* ── Font Picker ── */

.font-picker {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  margin-top: 8px;
}

.font-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 4px 5px;
  border-radius: 6px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--label);
  cursor: pointer;
  transition: all 0.15s;
}

.font-btn:hover {
  background: var(--card-hover);
  border-color: var(--input-border-hover);
  color: var(--text);
}

.font-btn.active {
  background: var(--accent-bg);
  border-color: var(--accent);
  color: var(--heading);
}

.font-btn-preview {
  font-size: 18px;
  line-height: 1.2;
}

.font-btn-name {
  font-size: 8px;
  font-family: 'Inter', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  opacity: 0.6;
}

/* ── SVG Upload ── */

.svg-upload-area {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.svg-preview {
  width: 100%;
  height: 80px;
  border-radius: 6px;
  border: 1px dashed var(--input-border);
  background: var(--input-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 8px;
}

.svg-preview svg {
  max-width: 100%;
  max-height: 100%;
  color: var(--text);
  fill: var(--text);
}

.svg-placeholder {
  font-size: 11px;
  color: var(--section-title);
}

.svg-upload-btn {
  width: 100%;
  padding: 7px;
  border-radius: 6px;
  border: 1px solid var(--input-border);
  background: var(--input-bg-alt);
  color: var(--label);
  font-size: 12px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}

.svg-upload-btn:hover {
  background: var(--card-hover);
  border-color: var(--input-border-hover);
  color: var(--heading);
}

/* ── Shape Picker ── */

.shape-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 0;
}

.shape-btn {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--label);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  padding: 0;
  font-family: inherit;
}

.shape-btn:hover {
  background: var(--card-hover);
  border-color: var(--input-border-hover);
  color: var(--text);
}

.shape-btn.active {
  background: var(--accent-bg);
  border-color: var(--accent);
  color: var(--heading);
}

.layer-body {
  display: none;
  padding: 10px 12px 12px;
  border-top: 1px solid var(--border);
}

.layer-card.expanded .layer-body {
  display: block;
}

.layer-actions {
  display: flex;
  gap: 6px;
  margin-top: 10px;
}

.layer-actions button {
  flex: 1;
  padding: 5px;
  border-radius: 5px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--label);
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}

.layer-actions button:hover {
  background: var(--card-hover);
  color: var(--text);
}

.layer-actions button.danger:hover {
  background: var(--danger-bg);
  border-color: var(--danger-border);
  color: var(--danger-text);
}

.add-layer-btn {
  width: 100%;
  padding: 8px;
  border-radius: 6px;
  border: 1px dashed var(--input-border);
  background: transparent;
  color: var(--section-title);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  margin-top: 6px;
  transition: all 0.15s;
}

.add-layer-btn:hover {
  border-color: var(--input-border-hover);
  color: var(--label);
  background: var(--card-bg);
}

/* ── Collapsible sub-section ── */

.sub-section {
  margin-top: 8px;
}

.sub-toggle {
  font-size: 11px;
  color: var(--section-title);
  cursor: pointer;
  user-select: none;
  padding: 4px 0;
}

.sub-toggle:hover { color: var(--label); }

.sub-body {
  display: none;
  padding-top: 6px;
}

.sub-section.open .sub-body { display: block; }

/* ── Randomize Row ── */

.randomize-row {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
}

.layer-count-input {
  width: 48px;
  padding: 6px 4px;
  border-radius: 6px;
  border: 1px solid var(--input-border);
  background: var(--input-bg-alt);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  text-align: center;
  -moz-appearance: textfield;
}

.layer-count-input::-webkit-inner-spin-button,
.layer-count-input::-webkit-outer-spin-button {
  opacity: 1;
}

.layer-count-input:focus {
  outline: none;
  border-color: var(--accent);
}

.randomize-btn {
  flex: 1;
  padding: 8px;
  border-radius: 6px;
  border: 1px solid var(--input-border);
  background: var(--input-bg-alt);
  color: var(--text);
  font-size: 12px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}

.randomize-btn:hover {
  background: var(--card-hover);
  color: var(--heading);
}

/* ── Export ── */

.export-row {
  display: flex;
  gap: 8px;
}

.export-row button {
  flex: 1;
  padding: 8px;
  border-radius: 6px;
  border: 1px solid var(--input-border);
  background: var(--input-bg-alt);
  color: var(--text);
  font-size: 12px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
}

.export-row button:hover {
  background: var(--card-hover);
  color: var(--heading);
}

.export-row button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.export-sub-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.export-resolution {
  font-size: 12px;
  color: var(--res-color);
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

.export-progress {
  margin-bottom: 8px;
}

.export-progress-bar {
  height: 4px;
  background: var(--progress-track);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 4px;
}

.export-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.15s;
}

.export-progress-text {
  font-size: 11px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

/* ── Hidden ── */

.hidden { display: none !important; }