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

:root {
  --bg: #1a1a1a;
  --bg2: #242424;
  --bg3: #2e2e2e;
  --border: #3a3a3a;
  --text: #e0e0e0;
  --text-dim: #888;
  --accent: #4a9eff;
  --danger: #e05555;
  --success: #4acd7f;
  --sidebar-w: 240px;
  --tab-h: 36px;
  --toolbar-h: 40px;
}

html, body { height: 100%; font: 14px/1.4 'Menlo', 'Consolas', monospace; background: var(--bg); color: var(--text); }

.hidden { display: none !important; }
.error { color: var(--danger); font-size: 12px; min-height: 18px; }

/* --- Login --- */
#login-screen {
  display: flex; align-items: center; justify-content: center; height: 100vh;
}
.login-box {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 8px;
  padding: 40px 36px; width: 320px;
}
.login-box h1 { font-size: 18px; margin-bottom: 24px; color: var(--accent); }
.login-box input {
  display: block; width: 100%; padding: 8px 10px; margin-bottom: 12px;
  background: var(--bg3); border: 1px solid var(--border); border-radius: 4px;
  color: var(--text); font: inherit;
}
.login-box input:focus { outline: none; border-color: var(--accent); }
.login-box button {
  width: 100%; padding: 9px; background: var(--accent); border: none;
  border-radius: 4px; color: #fff; font: inherit; cursor: pointer; margin-bottom: 10px;
}
.login-box button:hover { filter: brightness(1.1); }

/* --- App layout --- */
#app { display: flex; height: 100vh; overflow: hidden; }

/* --- Sidebar --- */
#sidebar {
  width: var(--sidebar-w); min-width: var(--sidebar-w);
  background: var(--bg2); border-right: 1px solid var(--border);
  display: flex; flex-direction: column; overflow: hidden;
}
#sidebar-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 10px; border-bottom: 1px solid var(--border); flex-shrink: 0;
}
#sidebar-title { font-size: 11px; color: var(--text-dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#sidebar-actions { display: flex; gap: 4px; flex-shrink: 0; }

.icon-btn {
  background: var(--bg3); border: 1px solid var(--border); border-radius: 3px;
  color: var(--text); cursor: pointer; padding: 3px 5px;
  display: flex; align-items: center; justify-content: center;
}
.icon-btn .codicon { font-size: 15px; line-height: 1; }
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }

#db-tree { flex: 1; overflow-y: auto; padding: 4px 0; }

.tree-item {
  display: flex; align-items: center; gap: 6px;
  padding: 3px 10px; cursor: pointer; white-space: nowrap;
  user-select: none; font-size: 13px;
}
.tree-item:hover { background: var(--bg3); }
.tree-item.active { background: var(--bg3); color: var(--accent); }
.tree-item .icon { font-size: 13px; flex-shrink: 0; }
.tree-item .name { overflow: hidden; text-overflow: ellipsis; }

.db-item { color: var(--text); }
.db-item .icon { color: var(--accent); }

.table-item { padding-left: 26px; color: var(--text-dim); }
.table-item .icon { color: var(--text-dim); font-size: 12px; }
.table-item:hover { color: var(--text); }
.table-item.active { color: var(--accent); }
.table-item.active .icon { color: var(--accent); }

/* --- Main area --- */
#main-area { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

/* --- Tabs --- */
#editor-tabs {
  display: flex; align-items: center; height: var(--tab-h);
  border-bottom: 1px solid var(--border); background: var(--bg2);
  overflow-x: auto; flex-shrink: 0;
}
.tab {
  display: flex; align-items: center; gap: 8px;
  padding: 0 14px; height: 100%; white-space: nowrap;
  border-right: 1px solid var(--border); cursor: pointer;
  font-size: 12px; color: var(--text-dim); flex-shrink: 0;
}
.tab:hover { background: var(--bg3); }
.tab.active { background: var(--bg); color: var(--text); }
.tab-close {
  font-size: 14px; color: var(--text-dim); line-height: 1;
  padding: 0 2px; border-radius: 2px;
}
.tab-close:hover { background: var(--bg3); color: var(--text); }

/* --- Toolbar --- */
#editor-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--toolbar-h); padding: 0 12px;
  border-bottom: 1px solid var(--border); background: var(--bg); flex-shrink: 0;
  gap: 8px;
}
#toolbar-left { display: flex; align-items: center; gap: 8px; min-width: 0; flex: 1; }
#toolbar-title { font-size: 12px; color: var(--text-dim); white-space: nowrap; }
#toolbar-status { font-size: 11px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#toolbar-right { display: flex; gap: 6px; flex-shrink: 0; }

#db-select {
  background: var(--bg3); border: 1px solid var(--border); border-radius: 3px;
  color: var(--text); font: 12px/1 monospace; padding: 3px 6px; cursor: pointer;
  max-width: 160px;
}
#db-select:focus { outline: none; border-color: var(--accent); }

.toolbar-btn {
  display: flex; align-items: center; gap: 4px;
  padding: 3px 10px; font: 12px/1 monospace; cursor: pointer;
  border-radius: 3px; border: 1px solid var(--border); white-space: nowrap;
}
.toolbar-btn .codicon { font-size: 13px; }
.toolbar-btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.toolbar-btn.primary:hover { filter: brightness(1.1); }
.toolbar-btn.secondary { background: var(--bg3); color: var(--text); }
.toolbar-btn.secondary:hover { border-color: var(--accent); }
.toolbar-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* --- Content area --- */
#content-area { flex: 1; overflow: hidden; display: flex; flex-direction: column; }

#empty-state {
  flex: 1; display: flex; align-items: center; justify-content: center;
  color: var(--text-dim); font-size: 13px;
}

/* --- Query pane --- */
#query-pane { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

/* Schema preview panel */
#query-schema-panel {
  flex-shrink: 0; border-bottom: 1px solid var(--border);
  padding: 4px 10px; display: flex; align-items: center;
  flex-wrap: wrap; align-content: flex-start; gap: 4px;
  overflow-y: auto; max-height: 82px; background: var(--bg2);
}
.schema-label {
  font-size: 11px; color: var(--accent); font-weight: 600; flex-shrink: 0; margin-right: 2px;
}
.schema-sep { font-size: 11px; color: var(--border); flex-shrink: 0; }
.schema-chip {
  display: inline-flex; align-items: baseline; gap: 3px;
  background: var(--bg3); border: 1px solid var(--border); border-radius: 3px;
  padding: 1px 6px; flex-shrink: 0; cursor: pointer; user-select: none;
}
.schema-chip:hover { border-color: var(--accent); background: var(--bg); }
.schema-chip:hover .chip-name { color: var(--accent); }
.chip-name { font-size: 11px; color: var(--text); }
.chip-type { font-size: 10px; color: var(--text-dim); }
.schema-hint { font-size: 11px; color: var(--text-dim); font-style: italic; }

/* CodeMirror autocomplete — dark theme */
.CodeMirror-hints {
  background: var(--bg2) !important; border: 1px solid var(--border) !important;
  border-radius: 4px !important; box-shadow: 0 4px 12px rgba(0,0,0,.5) !important;
  font: 12px/1.5 'Menlo', 'Consolas', monospace !important;
}
.CodeMirror-hint { color: var(--text) !important; padding: 3px 10px !important; }
li.CodeMirror-hint-active { background: var(--accent) !important; color: #fff !important; }

.query-editor-wrap {
  flex: 0 0 220px; border-bottom: 1px solid var(--border); overflow: hidden;
  display: flex; flex-direction: column;
}
.query-editor-wrap .CodeMirror {
  flex: 1; height: 100%; font-size: 13px; background: var(--bg);
}

#query-results {
  flex: 1; overflow: hidden; display: flex; flex-direction: column;
}
.results-placeholder {
  flex: 1; display: flex; align-items: center; justify-content: center;
  color: var(--text-dim); font-size: 13px; padding: 20px;
}
.results-placeholder.is-error { color: var(--danger); white-space: pre-wrap; text-align: left; align-items: flex-start; padding: 16px; font-size: 12px; }
.results-placeholder.is-success { color: var(--success); }
.results-table-outer { flex: 1; overflow: auto; }

/* --- Table pane --- */
#table-pane { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

#structure-section { flex-shrink: 0; border-bottom: 1px solid var(--border); }
.section-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 12px; cursor: pointer; user-select: none;
  font-size: 11px; color: var(--text-dim); background: var(--bg2);
}
.section-header:hover { background: var(--bg3); }
.section-header .codicon { font-size: 11px; }
#structure-body {
  display: flex; flex-wrap: wrap; align-content: flex-start; gap: 4px;
  padding: 6px 10px; max-height: 82px; overflow-y: auto; background: var(--bg);
}

#rows-section { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.rows-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 12px; border-bottom: 1px solid var(--border); flex-shrink: 0;
  font-size: 11px; color: var(--text-dim);
}
.pagination { display: flex; align-items: center; gap: 6px; }
.pagination button {
  padding: 2px 8px; font: 11px/1.4 monospace; cursor: pointer;
  background: var(--bg3); border: 1px solid var(--border); border-radius: 2px; color: var(--text);
}
.pagination button:hover:not(:disabled) { border-color: var(--accent); }
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }
.pagination span { font-size: 11px; color: var(--text-dim); }
.rows-table-wrap { flex: 1; overflow: auto; }

/* --- Data tables --- */
.results-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.results-table th {
  position: sticky; top: 0; background: var(--bg2);
  padding: 5px 12px; text-align: left; border-bottom: 1px solid var(--border);
  white-space: nowrap; color: var(--text-dim); font-weight: 600;
}
.results-table th.sortable { cursor: pointer; user-select: none; }
.results-table th.sortable:hover { color: var(--text); }
.results-table th.sort-active { color: var(--accent); }
.sort-icon { font-size: 10px; margin-left: 4px; vertical-align: middle; opacity: 0.35; }
.sort-icon.active { opacity: 1; color: var(--accent); }
.results-table tbody tr { cursor: pointer; }
.results-table td {
  padding: 4px 12px; border-bottom: 1px solid var(--border);
  max-width: 320px; vertical-align: top;
}
.cell-inner {
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  max-height: 22px; transition: max-height 0.22s ease;
}
.results-table tbody tr.row-expanded .cell-inner {
  max-height: 300px; white-space: pre-wrap; word-break: break-word;
  overflow-y: auto; text-overflow: clip;
}
.results-table tbody tr:hover td { background: var(--bg3); }
.results-table td.null-val .cell-inner { color: var(--text-dim); font-style: italic; }

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }