.playground {
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  overflow: hidden;
  margin: var(--spacing-lg) 0;
  background: var(--color-bg);
  &:first-child {
    margin-top: 0;
  }
}

.playground-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-header-bg);
}

.playground-tab {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border: none;
  background: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.15s, border-color 0.15s;
}

.playground-tab:hover {
  color: var(--color-text);
}

.playground-tab.is-active {
  color: var(--color-red);
  border-bottom-color: var(--color-red);
}

.playground-btn-codepen {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  margin-left: auto;
  padding: 0.5rem 1rem;
  border: none;
  background: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color 0.15s;
}

.playground-btn-codepen:hover {
  color: var(--color-red);
}

.playground-toggle-preview {
  display: none;
}

.playground-panes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 300px;
  position: relative;
}

.playground-editor {
  border-right: 1px solid var(--color-border);
  min-width: 0;
  position: relative;
}

.playground-resizer {
  position: absolute;
  top: 0;
  bottom: 0;
  right: -3px;
  width: 6px;
  cursor: col-resize;
  background: transparent;
  z-index: 1;
  transition: background 0.15s;
  user-select: none;
}

.playground-resizer:hover,
.playground-resizer.is-dragging {
  background: var(--color-red);
}

.playground-preview {
  display: flex;
  align-items: stretch;
  min-width: 0;
  position: relative;
}

.playground-loading {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: 0.875rem;
  z-index: 1;
  transition: opacity 0.3s;
}

.playground-loading.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.playground-loading.is-error {
  color: var(--color-red);
}

.playground-iframe {
  width: 100%;
  border: none;
  min-height: 300px;
  background: #fff;
}

html.dark-mode .playground-iframe {
  background: #fff;
}

/* CodeMirror overrides */
.CodeMirror {
  width: 100%;
  height: auto;
  min-height: 300px;
  font-family: 'SF Mono', 'Fira Code', 'Fira Mono', Menlo, Consolas, monospace;
  font-size: 0.875rem;
  line-height: 1.5;
  background: var(--color-code-bg);
  color: var(--color-text);
}

.CodeMirror-gutters {
  background: var(--color-code-bg);
  border-right: 1px solid var(--color-border);
}

.CodeMirror-linenumber {
  color: var(--color-text-secondary);
}

.CodeMirror-cursor {
  border-left: 2px solid var(--color-red);
}

.CodeMirror-selected {
  background: rgba(228, 0, 70, 0.15);
}

.CodeMirror-activeline-background {
  background: rgba(0, 0, 0, 0.04);
}

.CodeMirror-matchingbracket {
  outline: 1px solid var(--color-text-secondary);
  color: var(--color-text) !important;
}

.CodeMirror-scrollbar-filler,
.CodeMirror-gutter-filler {
  background: var(--color-code-bg);
}

.CodeMirror-scroll {
  overflow-x: hidden !important;
}

/* Syntax colors: light theme */
.cm-s-default .cm-keyword { color: #D73A49; }
.cm-s-default .cm-atom { color: #005CC5; }
.cm-s-default .cm-number { color: #005CC5; }
.cm-s-default .cm-def { color: #6F42C1; }
.cm-s-default .cm-variable { color: #E36209; }
.cm-s-default .cm-variable-2 { color: #005CC5; }
.cm-s-default .cm-variable-3 { color: #6F42C1; }
.cm-s-default .cm-property { color: #005CC5; }
.cm-s-default .cm-operator { color: #24292E; }
.cm-s-default .cm-comment { color: #586069; font-style: italic; }
.cm-s-default .cm-string { color: #032F62; }
.cm-s-default .cm-string-2 { color: #032F62; }
.cm-s-default .cm-meta { color: #586069; }
.cm-s-default .cm-qualifier { color: #6F42C1; }
.cm-s-default .cm-builtin { color: #005CC5; }
.cm-s-default .cm-bracket { color: #24292E; }
.cm-s-default .cm-tag { color: #22863A; }
.cm-s-default .cm-attribute { color: #6F42C1; }
.cm-s-default .cm-hr { color: #24292E; }
.cm-s-default .cm-link { color: #005CC5; }

/* Syntax colors: dark theme */
html.dark-mode .cm-s-default .cm-keyword { color: #FF7B72; }
html.dark-mode .cm-s-default .cm-atom { color: #79C0FF; }
html.dark-mode .cm-s-default .cm-number { color: #79C0FF; }
html.dark-mode .cm-s-default .cm-def { color: #D2A8FF; }
html.dark-mode .cm-s-default .cm-variable { color: #FFA657; }
html.dark-mode .cm-s-default .cm-variable-2 { color: #79C0FF; }
html.dark-mode .cm-s-default .cm-variable-3 { color: #D2A8FF; }
html.dark-mode .cm-s-default .cm-property { color: #79C0FF; }
html.dark-mode .cm-s-default .cm-operator { color: #E0E0E0; }
html.dark-mode .cm-s-default .cm-comment { color: #8B949E; font-style: italic; }
html.dark-mode .cm-s-default .cm-string { color: #A5D6FF; }
html.dark-mode .cm-s-default .cm-string-2 { color: #A5D6FF; }
html.dark-mode .cm-s-default .cm-meta { color: #8B949E; }
html.dark-mode .cm-s-default .cm-qualifier { color: #D2A8FF; }
html.dark-mode .cm-s-default .cm-builtin { color: #79C0FF; }
html.dark-mode .cm-s-default .cm-bracket { color: #E0E0E0; }
html.dark-mode .cm-s-default .cm-tag { color: #7EE787; }
html.dark-mode .cm-s-default .cm-attribute { color: #D2A8FF; }
html.dark-mode .cm-s-default .cm-hr { color: #E0E0E0; }
html.dark-mode .cm-s-default .cm-link { color: #79C0FF; }

html.dark-mode .CodeMirror-activeline-background {
  background: rgba(255, 255, 255, 0.04);
}

html.dark-mode .CodeMirror-matchingbracket {
  outline: 1px solid var(--color-text-secondary);
  color: var(--color-text) !important;
}

html.dark-mode .CodeMirror-selected { background: rgba(228, 0, 70, 0.25); }
html.dark-mode .CodeMirror-focused .CodeMirror-selected { background: rgba(228, 0, 70, 0.3); }

@media (max-width: 768px) {
  .playground-panes {
    grid-template-columns: 1fr;
  }

  .playground-editor {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .playground-resizer {
    display: none;
  }

  .playground-toggle-preview {
    display: flex;
    width: 100%;
    justify-content: center;
    gap: 0.25rem;
    padding: 0.5rem;
    border: none;
    border-top: 1px solid var(--color-border);
    background: var(--color-header-bg);
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: 0.8125rem;
    cursor: pointer;
    transition: color 0.15s;
  }

  .playground-toggle-preview:hover {
    color: var(--color-text);
  }

  .playground-preview.is-collapsed {
    display: none;
  }
}