:root {
  --bg: #111418;
  --surface: #1e1e1e;
  --titlebar: #2d2d30;
  --activitybar: #333333;
  --sidebar: #252526;
  --editor: #1e1e1e;
  --tab: #2d2d2d;
  --tab-active: #1e1e1e;
  --statusbar: #007acc;
  --border: #3a3d41;
  --text: #d4d4d4;
  --text-dim: #9da3ab;
  --key: #9cdcfe;
  --string: #ce9178;
  --link: #4fc1ff;
  --line-highlight: #2a2d2e;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(circle at top right, #1a2332 0%, #0f1217 55%, #0a0d11 100%);
  color: var(--text);
  font-family: Consolas, "Liberation Mono", Menlo, monospace;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1rem;
}
a {
  color: #44729b;
}
.vscode-shell {
  width: clamp(960px, calc(100vw - 2rem), 1700px);
  height: clamp(560px, calc(100vh - 2rem), 980px);
  max-width: calc(100vw - 2rem);
  max-height: calc(100vh - 2rem);
  display: grid;
  grid-template-rows: 40px 1fr 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
}

.titlebar {
  background: var(--titlebar);
  border-bottom: 1px solid #1a1a1a;
  display: flex;
  align-items: center;
  padding: 0 0.8rem;
  gap: 0.9rem;
}

.window-controls {
  display: flex;
  gap: 0.45rem;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.close {
  background: #ff5f57;
}

.dot.minimize {
  background: #ffbd2e;
}

.dot.maximize {
  background: #28c840;
}

.title {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.workspace {
  display: grid;
  grid-template-columns: clamp(44px, 3vw, 56px) clamp(210px, 18vw, 320px) 1fr;
  min-height: 0;
}

.activitybar {
  background: var(--activitybar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.7rem;
  padding-top: 0.75rem;
}

.activity {
  width: clamp(30px, 2vw, 36px);
  height: clamp(30px, 2vw, 36px);
  border: 0;
  background: transparent;
  color: #9da3ab;
  font-weight: 700;
  cursor: pointer;
  border-left: 2px solid transparent;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.activity.active {
  color: #ffffff;
  border-left-color: #ffffff;
}

.sidebar {
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  padding: 0.8rem 0.65rem;
  min-height: 0;
  overflow: auto;
}

.panel-title {
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.03em;
  margin-bottom: 0.75rem;
}

.folder-title {
  font-size: 0.8rem;
  margin-bottom: 0.45rem;
}

.tree {
  list-style: none;
  margin: 0;
  padding: 0;
}

.tree li a {
  display: block;
  color: #c5c5c5;
  text-decoration: none;
  font-size: 0.83rem;
  padding: 0.36rem 0.4rem;
  border-radius: 4px;
}

.tree li a:hover,
.tree li a:focus {
  background: #37373d;
}

.editor {
  background: var(--editor);
  min-height: 0;
  overflow: auto;
}

.tabs {
  display: flex;
  background: #252526;
  border-bottom: 1px solid var(--border);
}

.tab {
  margin: 0;
  padding: 0.6rem 0.9rem;
  font-size: 0.8rem;
  color: var(--text-dim);
  background: var(--tab);
  border-right: 1px solid var(--border);
}

.tab.active {
  color: var(--text);
  background: var(--tab-active);
}

.code {
  margin: 0;
  border-bottom: 1px solid #2c2c2c;
  padding: 0.8rem 1rem;
  font-size: 0.88rem;
  line-height: 1.6;
  scroll-margin-top: 1rem;
}

.code:target {
  background: var(--line-highlight);
}

.line {
  display: block;
}

.key {
  color: var(--key);
}

.value {
  color: var(--string);
}

.code a {
  color: var(--link);
  text-decoration: none;
}

.code a:hover {
  text-decoration: underline;
}

.markdown-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 0;
  height: calc(100% - 40px);
}

.markdown-source {
  border-right: 1px solid var(--border);
  border-bottom: 0;
  overflow: auto;
  margin: 0;
}

.markdown-preview {
  overflow: auto;
  padding: 0.9rem 1.1rem;
  line-height: 1.65;
  color: var(--text);
}

.markdown-preview h1,
.markdown-preview h2 {
  margin-top: 0;
}

.markdown-preview h1 {
  font-size: 1.4rem;
}

.markdown-preview h2 {
  font-size: 1.05rem;
  color: #c3d4ff;
}

.markdown-preview p,
.markdown-preview ul {
  margin: 0 0 1rem;
}

.statusbar {
  background: var(--statusbar);
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0 0.65rem;
  font-size: 0.76rem;
}

@media (max-width: 850px) {
  .vscode-shell {
    height: calc(100vh - 2rem);
    min-height: 0;
    width: calc(100vw - 2rem);
  }

  .workspace {
    grid-template-columns: 44px 170px 1fr;
  }
}

@media (max-width: 640px) {
  body {
    padding: 0;
  }

  .vscode-shell {
    width: 100%;
    min-height: 100vh;
    border-radius: 0;
  }

  .workspace {
    grid-template-columns: 44px 1fr;
    grid-template-rows: auto 1fr;
  }

  .sidebar {
    grid-column: 2;
    border-right: 0;
    border-bottom: 1px solid var(--border);
    max-height: 180px;
  }

  .editor {
    grid-column: 1 / span 2;
  }

  .markdown-split {
    grid-template-columns: 1fr;
    height: auto;
  }

  .markdown-source {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .title {
    max-width: 55vw;
  }
}