:root {
  --bg: #f8f9fb;
  --panel: #ffffff;
  --text: #16202a;
  --muted: #5c6670;
  --border: #d4d9de;
  --accent: #0b5cab;
  --accent-hover: #084780;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f8f9fb 0%, #eef2f6 100%);
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}

.app-header h1 {
  margin: 0;
  font-size: 1rem;
  font-weight: 650;
}

.app-main {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 0;
  padding: 0;
  min-height: calc(100vh - 58px);
}

.editor-section {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 0.5rem;
  overflow: hidden;
  min-width: 0;
}

.editor-section sparql-editor {
  display: block;
  width: 100%;
  min-height: calc(100vh - 90px);
}

.examples-sidebar {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 0.35rem;
  overflow: auto;
}

.examples-sidebar h2 {
  margin: 0;
  font-size: 1rem;
}

.sidebar-help {
  margin: 0.2rem 0 0.45rem;
  color: var(--muted);
  font-size: 0.8rem;
}

.examples-status {
  margin-bottom: 0.45rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.examples-list {
  display: grid;
  gap: 0.4rem;
}

.example-item {
  border: 1px solid var(--border);
  padding: 0.4rem;
  background: #fbfcfe;
}

.example-title {
  margin: 0 0 0.25rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.example-preview {
  margin: 0 0 0.35rem;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.3;
  white-space: pre-wrap;
}

.example-actions {
  display: flex;
  gap: 0.35rem;
}

.btn {
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  padding: 0.25rem 0.45rem;
  font-size: 0.85rem;
  cursor: pointer;
}

.btn:hover {
  border-color: #b8c0c7;
}

.btn-primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  border-color: var(--accent-hover);
  background: var(--accent-hover);
}

body.sidebar-collapsed .app-main {
  grid-template-columns: 1fr;
}

body.sidebar-collapsed .examples-sidebar {
  display: none;
}

@media (max-width: 980px) {
  .app-main {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0;
  }

  .examples-sidebar {
    max-height: 42vh;
  }
}