:root {
  --canvas-bg: #ffffff;
  --chrome-bg: #f1f3f5;
  --text-color: #1a1a1a;
  --text-muted: #6b7280;
  --border-color: #dfe2e6;
  --accent: #3b82f6;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --btn-hover: #e9ecef;
  --panel-bg: #f1f3f5;
  --dot-color: rgba(0, 0, 0, 0.1);
}
[data-theme="dark"] {
  --canvas-bg: #0f172a;
  --chrome-bg: #1e293b;
  --text-color: #f1f5f9;
  --text-muted: #94a3b8;
  --border-color: #334155;
  --accent: #60a5fa;
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  --btn-hover: #334155;
  --panel-bg: #1e293b;
  --dot-color: rgba(255, 255, 255, 0.06);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  font-family: "Inter", system-ui, sans-serif;
  background: var(--canvas-bg);
  color: var(--text-color);
  overflow: hidden;
  font-size: 16px;
}
p {
  font-size: 18px;
}

#app,
.app-header,
.app-footer,
.modal-overlay {
  width: 100%;
  max-width: 100%;
  margin-bottom: 0;
}
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Header */
.app-header {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  background: var(--chrome-bg);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  flex-shrink: 0;
}
.app-header h1 {
  font-size: 18px !important;
  font-weight: 700;
  color: var(--text-color) !important;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: -0.3px;
}
.header-actions {
  display: flex;
  gap: 6px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 12px;
  border: 1px solid var(--border-color);
  background: var(--chrome-bg);
  color: var(--text-color);
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s;
}
.btn:hover {
  background: var(--btn-hover);
}
/* Canvas */
.main-area {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--canvas-bg);
}
canvas {
  position: absolute;
  top: 0;
  left: 0;
  touch-action: none;
  cursor: crosshair;
}

/* Toolbar */
.toolbar {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 2px;
  background: var(--chrome-bg);
  padding: 6px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  z-index: 50;
}
.tool-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.15s;
}
.tool-btn:hover {
  background: var(--btn-hover);
  color: var(--text-color);
}
.tool-btn.active {
  background: var(--accent);
  color: #fff;
}
.toolbar-sep {
  width: 1px;
  background: var(--border-color);
  margin: 4px 3px;
}

/* Props Panel */
.text-props-panel {
  position: absolute;
  top: 16px;
  left: 16px;
  width: 250px;
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 14px;
  box-shadow: var(--shadow);
  z-index: 50;
  display: none;
  flex-direction: column;
  gap: 14px;
  max-height: calc(100vh - 160px);
  overflow-y: auto;
}
.props-panel {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 250px;
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 14px;
  box-shadow: var(--shadow);
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-height: calc(100vh - 160px);
  overflow-y: auto;
}
.prop-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.prop-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}
.color-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 5px;
}
.color-swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 5px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.1s;
}
.color-swatch:hover {
  transform: scale(1.12);
}
.color-swatch.active {
  border-color: var(--accent);
  transform: scale(1.1);
}
.color-swatch.transparent-sw {
  background: repeating-linear-gradient(
    45deg,
    #ccc,
    #ccc 4px,
    #fff 4px,
    #fff 8px
  );
}
.style-row {
  display: flex;
  gap: 4px;
}
.style-btn {
  flex: 1;
  padding: 5px 4px;
  border: 1px solid var(--border-color);
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  color: var(--text-color);
  font-size: 11px;
  text-align: center;
  transition: all 0.15s;
}
.style-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.icon-btn {
  min-width: 44px;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 8px;
}
.icon-btn svg {
  display: block;
}
.sw-line {
  display: block;
  width: 22px;
  background: currentColor;
  border-radius: 0.5px;
}
input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}

/* Zoom Bar */
.zoom-bar {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--chrome-bg);
  padding: 4px 8px;
  border-radius: 8px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  z-index: 50;
}
.zoom-bar button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-color);
  font-size: 15px;
  padding: 2px 7px;
  border-radius: 5px;
  transition: background 0.12s;
  display: flex;
  align-items: center;
  justify-content: center;
}
.zoom-bar button:hover {
  background: var(--btn-hover);
}
.zoom-pct {
  font-size: 12px;
  font-weight: 600;
  min-width: 44px;
  text-align: center;
  color: var(--text-muted);
}

/* Footer */
.app-footer {
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--chrome-bg);
  border-top: 1px solid var(--border-color);
  z-index: 100;
  flex-shrink: 0;
}
.footer-link {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 5px;
  text-decoration: none;
  padding: 4px 8px;
  border-radius: 5px;
  transition: all 0.12s;
}
.footer-link:hover {
  color: var(--text-color);
  background: var(--btn-hover);
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal-overlay.active {
  display: flex;
}
.modal {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 28px;
  width: 92%;
  max-width: 480px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
  position: relative;
  max-height: 85vh;
  overflow-y: auto;
}
.modal h2 {
  margin-bottom: 16px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-color);
}
.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  transition: all 0.12s;
}
.modal-close:hover {
  color: var(--text-color);
  background: var(--btn-hover);
}
.modal-content {
  line-height: 1.7;
}
.modal-content ol {
  padding-left: 20px;
  margin-bottom: 14px;
}
.modal-content li {
  margin-bottom: 6px;
  font-size: 16px;
}

/* Modal Actions */
.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 20px;
}
.modal-btn {
  padding: 9px 20px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}
.modal-btn.secondary {
  background: transparent;
  color: var(--text-color);
}
.modal-btn.secondary:hover {
  background: var(--btn-hover);
}
.modal-btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.modal-btn.primary:hover {
  opacity: 0.9;
}
.modal-btn.danger {
  background: #ef4444;
  color: #fff;
  border-color: #ef4444;
}
.modal-btn.danger:hover {
  opacity: 0.9;
}

/* Text Input */
.text-area-input {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--canvas-bg);
  color: var(--text-color);
  font-size: 16px;
  font-family: "Inter", sans-serif;
  resize: vertical;
  min-height: 80px;
  outline: none;
}
.text-area-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.disclaimer {
  margin-top: 14px;
  padding: 10px 14px;
  background: rgba(59, 130, 246, 0.08);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-muted);
  font-style: italic;
}

.shape-props-panel {
  position: absolute;
  top: 16px;
  left: 16px;
  width: 250px;
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 14px;
  box-shadow: var(--shadow);
  z-index: 50;
  display: none;
  flex-direction: column;
  gap: 14px;
  max-height: calc(100vh - 160px);
  overflow-y: auto;
}
.image-props-panel {
  position: absolute;
  top: 16px;
  left: 16px;
  width: 250px;
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 14px;
  box-shadow: var(--shadow);
  z-index: 50;
  display: none;
  flex-direction: column;
  gap: 14px;
  max-height: calc(100vh - 160px);
  overflow-y: auto;
}
.file-input-hidden {
  display: none;
}

@media (max-width: 600px) {
  .toolbar {
    top: 6px;
    padding: 4px;
  }
  .tool-btn {
    width: 32px;
    height: 32px;
  }
  .toolbar-sep {
    display: none;
  }
  .props-panel {
    width: 200px;
    right: 6px;
    top: 6px;
    padding: 10px;
    font-size: 12px;
  }
  .text-props-panel {
    width: 200px;
    left: 6px;
    top: 6px;
    padding: 10px;
    font-size: 12px;
  }
  .shape-props-panel {
    width: 200px;
    left: 6px;
    top: 6px;
    padding: 10px;
    font-size: 12px;
  }
  .image-props-panel {
    width: 200px;
    left: 6px;
    top: 6px;
    padding: 10px;
    font-size: 12px;
  }
  .header-actions span {
    display: none;
  }
}