:root {
  --bg-primary: #ececec;
  --bg-secondary: #ffffff;
  --bg-accent: #9fd3c7;
  --text-primary: #142d4c;
  --text-secondary: #385170;
  --border-color: #385170;
  --btn-bg: #385170;
  --btn-bg-hover: #142d4c;
  --btn-text: #ffffff;
  --bg-iframe: #f5f5f5;
}

:root.dark {
  --bg-primary: #121212;
  --bg-secondary: #1e1e1e;
  --bg-accent: #2d2d2d;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --border-color: #3d3d3d;
  --btn-bg: #0d7377;
  --btn-bg-hover: #14a3a8;
  --btn-text: #ffffff;
  --bg-iframe: #f0f0f0;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  background-color: var(--bg-primary);
  font-family: Arial, Helvetica, sans-serif;
  margin: 20px 100px;
  color: var(--text-primary);
}

h1,
h2 {
  text-align: center;
  margin-bottom: 10px;
  color: var(--text-primary);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

header h1 {
  margin: 0;
}

.container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  height: 90vh;
}

.column {
  display: flex;
  flex-direction: column;
  gap: 20px;
  min-height: 0;
}

.column.editor {
  gap: 10px;
}

.editor,
.preview {
  background-color: var(--bg-secondary);
  padding: 15px;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  min-height: 0;
}

.code-editor {
  flex: 1;
  border: 3px solid var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.code-editor .cm-editor {
  height: 100%;
}

.code-editor .cm-scroller {
  overflow: auto;
}

#editor-raw-html {
  flex: 1;
}

iframe {
  flex: 1;
  width: 100%;
  border: 3px solid var(--border-color);
  border-radius: 4px;
  padding: 12px;
  overflow: auto;
  background-color: var(--bg-iframe);
  min-height: 0;
}

.buttons {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

button {
  background: var(--btn-bg);
  color: var(--btn-text);
  padding: 8px 16px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background: var(--btn-bg-hover);
}

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

.header-buttons {
  display: flex;
  gap: 5px;
}

.editor h2,
.preview h2 {
  text-align: left;
  margin: 0;
}

@media (max-width: 1200px) {
  .container {
    grid-template-columns: repeat(2, 1fr);
    height: auto;
  }

  .column {
    min-height: 70vh;
  }
}

@media (max-width: 800px) {
  .container {
    grid-template-columns: 1fr;
  }

  body {
    margin: 20px;
  }
}

.notification {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  padding: 12px 20px;
  border-radius: 6px;
  color: white;
  font-weight: 500;
  z-index: 1000;
  animation: slideDown 0.3s ease;
}

.notification-success {
  background-color: #28a745;
}

.notification-error {
  background-color: #dc3545;
}

.notification-warning {
  background-color: #ffc107;
  color: #333;
}

@keyframes slideDown {
  from {
    transform: translateX(-50%) translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
  }
}