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

html, body {
  height: 100%;
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  html, body {
    background: #050505;
  }
}

#editor {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  width: 100%;
  min-height: 100vh;
  overflow-x: auto;
}

#page {
  background: #fff;
  cursor: text;
  display: block;
  flex: 0 0 auto;
  width: 960px;
  max-width: 960px;
  margin: 0 auto;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

@media (prefers-color-scheme: dark) {
  #page {
    background: #050505;
  }
}

#hidden-input {
  position: fixed;
  left: -9999px;
  top: -9999px;
  width: 0;
  height: 0;
  opacity: 0;
  pointer-events: none;
}

#selection-tooltip {
  position: fixed;
  display: flex;
  gap: 2px;
  padding: 4px;
  border: 1px solid rgba(15, 15, 15, 0.08);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 8px 24px rgba(15, 15, 15, 0.14), 0 1px 3px rgba(15, 15, 15, 0.08);
  backdrop-filter: blur(12px);
  opacity: 0;
  transform: translate(-50%, -8px);
  pointer-events: none;
  z-index: 150;
  transition: opacity 0.1s, transform 0.1s;
}

#selection-tooltip.visible {
  opacity: 1;
  transform: translate(-50%, -12px);
  pointer-events: auto;
}

#selection-tooltip button {
  min-width: 28px;
  height: 28px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: #37352f;
  cursor: pointer;
  font-size: 14px;
}

#selection-tooltip button:hover {
  background: rgba(55, 53, 47, 0.08);
}

/* Toolbar */
#toolbar {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  background: rgba(255, 255, 255, 0.95);
  padding: 8px 12px;
  border-radius: 12px;
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.08);
  z-index: 100;
  backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity 0.3s;
}

#toolbar:hover,
#toolbar.visible {
  opacity: 1;
}

#toolbar button {
  background: none;
  border: 1px solid #d2d2d7;
  padding: 8px 16px;
  font-size: 13px;
  border-radius: 8px;
  cursor: pointer;
  color: #1d1d1f;
  transition: background 0.15s;
}

#toolbar button:hover {
  background: #f0f0f5;
}

/* Settings Panel */
.panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 320px;
  height: 100%;
  background: #fff;
  box-shadow: -2px 0 16px rgba(0, 0, 0, 0.1);
  z-index: 200;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.25s ease;
  pointer-events: none;
}

.panel.open {
  transform: translateX(0);
  pointer-events: auto;
}

.panel-content {
  padding: 24px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

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

.close-btn {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: #6e6e73;
  padding: 4px 8px;
  border-radius: 6px;
}

.close-btn:hover {
  background: #f0f0f5;
}

.panel-content label {
  display: block;
  margin-bottom: 16px;
  font-size: 14px;
  color: #6e6e73;
}

.panel-content input[type="range"] {
  width: 100%;
  margin-top: 6px;
}

.panel-content input[type="color"] {
  width: 100%;
  height: 36px;
  border: 1px solid #d2d2d7;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 6px;
}

.panel-content select {
  width: 100%;
  padding: 8px;
  font-size: 14px;
  border: 1px solid #d2d2d7;
  border-radius: 6px;
  margin-top: 6px;
  background: #fff;
}

#model-status {
  position: fixed;
  top: 12px;
  right: 16px;
  font-size: 12px;
  color: #aaa;
  z-index: 50;
  transition: opacity 0.5s;
}