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

:root {
  --bg:        #1c1e2a;
  --bg2:       #22253a;
  --bg3:       #2a2e45;
  --bg4:       #1e2132;
  --bg-alt:    #222540;
  --border:    #3a3f58;
  --border2:   #4a5070;
  --text:      #cdd0e0;
  --text-dim:  #7a80a0;
  --text-hi:   #e8eaf5;
  --accent:    #2d5a9e;
  --accent2:   #3a6db8;
  --selected:  #1c3a6e;
  --hdr:       #2a2e45;
  --btn:       #2e3250;
  --btn-bdr:   #5a6088;
  --cell-bdr:  #2e3350;
  --inp:       #252840;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 13px;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

#titlebar {
  background: #14152a;
  padding: 0.35rem 0.8rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
#app-title { font-weight: bold; font-size: 1rem; color: var(--text-hi); letter-spacing: 0.05em; }

#main { display: flex; flex: 1; overflow: hidden; }

/* ── Sidebar ── */
#sidebar {
  width: 185px;
  min-width: 185px;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#obj-type-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.obj-type-btn {
  flex: 1;
  padding: 0.4rem;
  background: var(--bg3);
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  transition: color .12s, border-color .12s;
}
.obj-type-btn.active  { color: var(--text-hi); border-bottom-color: var(--accent); background: var(--bg2); }
.obj-type-btn:hover:not(.active) { color: var(--text); }

#object-list { flex: 1; overflow-y: auto; padding: 0.2rem 0; }

.obj-item {
  display: flex; align-items: center; gap: 0.4rem;
  padding: 0.32rem 0.6rem;
  cursor: pointer;
  border-radius: 3px;
  margin: 1px 4px;
  font-size: 0.83rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  user-select: none;
}
.obj-item:hover    { background: var(--bg3); }
.obj-item.selected { background: var(--selected); color: var(--text-hi); }
.obj-icon { font-size: 0.85rem; flex-shrink: 0; }
.obj-empty { padding: 0.6rem 0.8rem; color: var(--text-dim); font-style: italic; font-size: 0.8rem; }

#sidebar-footer {
  padding: 0.35rem;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.2rem;
  flex-shrink: 0;
}

/* ── Buttons ── */
button {
  background: var(--btn);
  border: 1px solid var(--btn-bdr);
  color: var(--text);
  padding: 0.28rem 0.5rem;
  cursor: pointer;
  border-radius: 3px;
  font-size: 0.77rem;
  font-family: inherit;
  transition: background .1s;
  white-space: nowrap;
}
button:hover:not(:disabled) { background: var(--bg3); border-color: var(--border2); }
button:disabled { opacity: 0.38; cursor: not-allowed; }
button.primary {
  background: var(--accent); border-color: var(--accent);
  color: #fff; font-weight: 600;
}
button.primary:hover:not(:disabled) { background: var(--accent2); }
button.danger:hover:not(:disabled) { background: #5a1818; border-color: #903030; }

#btn-demo {
  grid-column: 1 / -1;
  background: #253420;
  border-color: #4a6030;
  color: #9ab870;
}
#btn-demo:hover { background: #2e4228; }

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

#tab-bar {
  display: flex;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  overflow-y: hidden;
  flex-shrink: 0;
  min-height: 29px;
}
#tab-bar::-webkit-scrollbar { height: 3px; }
#tab-bar::-webkit-scrollbar-thumb { background: var(--border2); }

.tab {
  display: flex; align-items: center; gap: 0.3rem;
  padding: 0.22rem 0.7rem 0.22rem 0.55rem;
  border-right: 1px solid var(--border);
  cursor: pointer;
  white-space: nowrap;
  font-size: 0.78rem;
  color: var(--text-dim);
  background: var(--bg3);
  border-top: 2px solid transparent;
  user-select: none;
}
.tab.active { background: var(--bg4); color: var(--text-hi); border-top-color: var(--accent); }
.tab:hover:not(.active) { background: var(--bg2); color: var(--text); }
.tab-icon { font-size: 0.75rem; }
.tab-x {
  background: none; border: none; color: var(--text-dim);
  font-size: 1rem; line-height: 1; padding: 0 0.1rem;
  cursor: pointer; margin-left: 0.15rem;
}
.tab-x:hover { color: #e06060; background: none; border: none; }

#view-area { flex: 1; overflow: hidden; position: relative; }

.view-content { height: 100%; display: flex; flex-direction: column; overflow: hidden; }

/* ── Welcome ── */
.welcome {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  height: 100%; color: var(--text-dim); text-align: center; gap: 0.8rem;
  padding: 2rem;
}
.welcome h2 { color: var(--text); font-size: 1.4rem; margin-bottom: 0.3rem; }
.welcome p  { font-size: 0.88rem; line-height: 1.7; max-width: 380px; }
.welcome code { background: var(--bg3); padding: 0.1rem 0.3rem; border-radius: 3px; font-size: 0.82rem; }

/* ── View toolbar ── */
.view-toolbar {
  display: flex; align-items: center; gap: 0.3rem;
  padding: 0.35rem 0.5rem;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.toolbar-sep { width: 1px; height: 1.2rem; background: var(--border); margin: 0 0.1rem; }
.toolbar-info { margin-left: auto; font-size: 0.75rem; color: var(--text-dim); }

/* ── Shared grid ── */
.grid-wrapper { flex: 1; overflow: auto; }

.grid {
  border-collapse: collapse;
  width: max-content;
  min-width: 100%;
  font-size: 0.84rem;
}
.grid thead th {
  background: var(--hdr);
  border: 1px solid var(--cell-bdr);
  padding: 0.28rem 0.5rem;
  text-align: left;
  font-weight: 600;
  color: var(--text-hi);
  white-space: nowrap;
  position: sticky;
  top: 0;
  z-index: 2;
  user-select: none;
}
.grid tbody td {
  border: 1px solid var(--cell-bdr);
  padding: 0.18rem 0.4rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 320px;
}
.grid tbody tr               { background: var(--bg4); }
.grid tbody tr:nth-child(even) { background: var(--bg-alt); }
.grid tbody tr:hover           { background: #262a3f; }
.grid tbody tr.selected        { background: var(--selected) !important; }

.row-sel {
  width: 24px; min-width: 24px !important; max-width: 24px !important;
  background: var(--bg3) !important;
  border-color: var(--border) !important;
  text-align: center;
  cursor: pointer;
  padding: 0 !important;
  font-size: 0.7rem;
  color: var(--text-dim);
}
th.row-sel { background: var(--hdr) !important; }

/* ── Datasheet ── */
.cell      { cursor: default; }
.cell.edit { cursor: text; }
.cell.edit:hover { background: rgba(255,255,255,0.04); }

.new-row td              { opacity: 0.5; }
.new-row .new-row-star   { color: var(--accent2); font-weight: bold; opacity: 1; }
.new-row td.cell:hover   { background: rgba(255,255,255,0.04) !important; opacity: 1; cursor: pointer; }

.cell-input {
  display: block;
  width: 100%;
  background: #1a2550;
  border: 2px solid var(--accent2);
  color: var(--text-hi);
  padding: 0.1rem 0.25rem;
  font-size: 0.84rem;
  font-family: inherit;
  outline: none;
}
textarea.cell-input { resize: vertical; min-height: 56px; }

input[type=checkbox] { cursor: pointer; accent-color: var(--accent2); }
.cb-cell { text-align: center; }

/* ── Design view ── */
.design-grid { width: 100%; }
.design-grid td { padding: 0.12rem 0.3rem; vertical-align: middle; }
.design-grid tr:hover td { background: #262a3f; }
.design-grid tr.selected td { background: var(--selected) !important; }

.di {
  width: 100%;
  background: var(--inp);
  border: 1px solid transparent;
  color: var(--text);
  padding: 0.18rem 0.3rem;
  font-size: 0.84rem;
  font-family: inherit;
  outline: none;
}
.di:focus    { border-color: var(--accent); }
.di:disabled { opacity: 0.45; }
.di.size     { max-width: 72px; }
select.di    { cursor: pointer; }

/* ── Query view ── */
.query-view { display: flex; flex-direction: column; height: 100%; overflow: hidden; }

.sql-area {
  padding: 0.4rem;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sql-editor {
  width: 100%;
  height: 5.5rem;
  background: #111420;
  border: 1px solid var(--border);
  color: #a0d090;
  padding: 0.4rem 0.5rem;
  font-family: 'Consolas', 'Courier New', monospace;
  font-size: 0.82rem;
  resize: vertical;
  outline: none;
  border-radius: 2px;
  line-height: 1.55;
  tab-size: 2;
}
.sql-editor:focus { border-color: var(--accent); }
.sql-hint { font-size: 0.7rem; color: var(--text-dim); margin-top: 0.2rem; }

.query-results { flex: 1; overflow: hidden; display: flex; flex-direction: column; }
.query-error {
  margin: 0.5rem;
  padding: 0.6rem 0.8rem;
  background: #2a1010;
  border: 1px solid #5a2020;
  color: #f07070;
  border-radius: 3px;
  font-family: monospace;
  font-size: 0.82rem;
}
.query-empty {
  padding: 1.5rem;
  color: var(--text-dim);
  text-align: center;
  font-style: italic;
  font-size: 0.85rem;
}
.results-grid { min-width: 100%; }

/* ── Status bar ── */
#statusbar {
  background: #14152a;
  border-top: 1px solid var(--border);
  padding: 0.22rem 0.6rem;
  font-size: 0.72rem;
  color: var(--text-dim);
  flex-shrink: 0;
}

/* ── Scrollbars ── */
::-webkit-scrollbar       { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #6070a0; }