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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
  background-color: #fff;
  color: #000;
  transition: all 0.3s ease;
}

body.dark {
  background-color: #1e1e1e;
  color: #eee;
}

header {
  background: #333;
  color: white;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

header h1 {
  font-size: 1.25em;
  margin: 0;
  font-weight: 600;
  text-align: center;
}

header p {
  font-size: 0.95em;
  margin: 0;
  text-align: center;
  opacity: 0.9;
}

.menu-wrapper {
  position: relative;
  width: 100%;
  max-width: 220px;
}

.menu-button {
  width: 100%;
  padding: 9px 14px;
  background: #45B7D1;
  color: white;
  border: none;
  cursor: pointer;
  border-radius: 6px;
  font-size: 14px;
  font-weight: bold;
  transition: background 0.2s;
}

.menu-button:hover {
  background: #3aa0c2;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: white;
  border: 1px solid #ccc;
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.12);
  z-index: 10;
  display: none;
  flex-direction: column;
  min-width: 180px;
  max-height: 50vh;
  overflow-y: auto;
}

.dropdown-menu button {
  width: 100%;
  text-align: left;
  padding: 10px 14px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
}

.dropdown-menu button:hover {
  background: #f8f8f8;
}

.dropdown-menu hr {
  margin: 6px 0;
  border: 0;
  border-top: 1px solid #eee;
}

/* === ИКОНКИ === */
.icon {
  width: 18px;
  height: 18px;
  margin-right: 8px;
  vertical-align: middle;
  stroke: currentColor;
  fill: none;
}

.dropdown-menu button:hover .icon {
  stroke: #FF6B6B;
}

main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.editor-container {
  display: flex;
  flex-direction: column;
  border: 1px solid #ccc;
  flex: 1;
}

.CodeMirror {
  flex: 1;
  border: none;
  font-size: 14px;
  min-height: 200px;
  overflow: hidden;
  touch-action: manipulation;
}

/* === Подписи над редакторами === */
.editor-label {
  background: #f0f0f0;
  padding: 4px 8px;
  font-weight: bold;
  font-size: 0.85em;
  border-bottom: 1px solid #ccc;
  user-select: none;
}

/* === Подсказки (tooltips) === */
button[title] {
  position: relative;
}
button[title]:hover::after {
  content: attr(title);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  background: #333;
  color: white;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 12px;
  white-space: nowrap;
  z-index: 100;
  pointer-events: none;
  opacity: 0;
  animation: fadeIn 0.2s forwards;
}
@keyframes fadeIn {
  to { opacity: 1; }
}

/* === JS-редактор (скрыт по умолчанию) === */
.js-editor-container {
  display: none;
}
.js-editor-container:not(.hidden) {
  display: flex;
}

.hidden {
  display: none !important;
}

/* === Анимация предпросмотра === */
.preview-container {
  flex: 1;
  overflow: hidden;
}
#output-frame {
  width: 100%;
  height: 100%;
  border: none;
  background: white;
  overflow: auto;
  transition: opacity 0.3s ease;
}
.apply-fade {
  opacity: 0.5;
}

/* Адаптивность */
@media (max-width: 768px) {
  main {
    flex-direction: column;
    height: calc(100vh - 120px);
  }

  .editor-container,
  .preview-container {
    width: 100%;
    height: 32vh !important;
    min-height: 140px;
  }

  .preview-container {
    height: 28vh !important;
  }

  header h1 { font-size: 1.1em; }
  header p { font-size: 0.9em; }
  .CodeMirror { font-size: 12px; }
  .dropdown-menu button { font-size: 13px; padding: 8px 12px; }
}

@media (max-width: 480px) {
  .editor-container,
  .preview-container {
    height: 26vh !important;
  }

  .CodeMirror { font-size: 11px; }
  .menu-button { font-size: 13px; padding: 7px 12px; }
}