:root {
  --bg: #0f1117;
  --bg2: #161a23;
  --panel: #1b202b;
  --panel2: #13161d;
  --border: #262d3b;
  --border-strong: #343e52;
  --field: #1e2530;
  --field-hover: #232b39;
  --text: #e6e9ef;
  --muted: #8b93a7;
  --accent: #6366f1;
  --accent2: #818cf8;
  --danger: #ef4444;
  --ok: #10b981;
  --yellow: #f59e0b;
  --mono: "SFMono-Regular", ui-monospace, "Cascadia Code", Consolas, "Liberation Mono", monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --radius: 8px;
  --toolbar-h: 52px;
  --statusbar-h: 26px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}
.hidden { display: none !important; }

/* ---------- Toolbar ---------- */
#toolbar {
  height: var(--toolbar-h);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 12px;
  background: var(--panel2);
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 8px; margin-right: 4px; }
.brand .logo {
  width: 32px; height: 32px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  display: grid; place-items: center; color: #fff;
}
.brand-name { font-weight: 700; letter-spacing: .3px; }
.toolbar-group { display: flex; align-items: center; gap: 4px; padding: 0 6px; border-right: 1px solid var(--border); }
.toolbar-group:last-child, .toolbar-group-right { border-right: none; margin-left: auto; }
.tool-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: transparent; color: var(--muted);
  border: 1px solid transparent; border-radius: 6px;
  padding: 6px 9px; font-size: 13px; cursor: pointer;
  font-family: var(--sans); transition: all .12s;
}
.tool-btn:hover { background: var(--bg); color: var(--text); border-color: var(--border); }
.tool-btn.active { background: var(--accent); color: #fff; }
.tool-btn.accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.tool-btn.accent:hover { background: var(--accent2); }
.toolbar-group-tools .tool-btn.active { background: rgba(99,102,241,.18); color: var(--accent2); border-color: rgba(99,102,241,.45); }
.zoom-label { font-size: 11px; color: var(--muted); min-width: 40px; text-align: center; font-variant-numeric: tabular-nums; }
#btn-zoom-out, #btn-zoom-in { min-width: 28px; justify-content: center; padding: 6px 8px; }

/* ---------- Layout ---------- */
#layout { display: flex; height: calc(100vh - var(--toolbar-h) - var(--statusbar-h)); }

#viewport { position: relative; flex: 1; overflow: hidden; background: var(--bg); }
#world {
  position: absolute; top: 0; left: 0;
  width: 20000px; height: 20000px;
  transform-origin: 0 0;
  background-image: radial-gradient(circle, rgba(255,255,255,.055) 1px, transparent 1.4px);
  background-size: 20px 20px;
  will-change: transform;
}
#svg-layer { position: absolute; top: 0; left: 0; width: 20000px; height: 20000px; overflow: visible; }
#entity-layer { position: absolute; top: 0; left: 0; }

.hint {
  position: absolute; top: 0; left: 0;
  color: var(--muted); font-size: 14px;
  padding: 14px 18px; max-width: 420px;
  line-height: 1.65; user-select: none;
}
.cursor-info {
  position: absolute; left: 10px; bottom: 10px;
  font-family: var(--mono); font-size: 11px; color: var(--muted);
  background: rgba(0,0,0,.45); padding: 3px 8px; border-radius: 5px;
  pointer-events: none;
}

#viewport.panning { cursor: grabbing; }
#viewport.relation-mode { cursor: crosshair; }

/* ---------- Entity card ---------- */
.entity {
  position: absolute;
  width: 220px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 6px 18px rgba(0,0,0,.35);
  user-select: none;
  overflow: hidden;
  cursor: grab;
}
.entity:active { cursor: grabbing; }
.entity.selected { box-shadow: 0 0 0 2px var(--accent), 0 8px 22px rgba(0,0,0,.45); }
.entity.dragging { opacity: .85; }
.entity .head {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 12px;
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,0));
  border-bottom: 1px solid var(--border);
}
.entity .head .dot { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.entity .head .ename { font-weight: 600; font-size: 13.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.entity .head .ecount { margin-left: auto; font-size: 11px; color: var(--muted); flex: none; }
.entity .note { font-size: 11px; color: var(--muted); padding: 4px 12px 2px; font-style: italic; }

.entity .cols { font-family: var(--mono); font-size: 12px; }
.entity .col {
  display: flex; align-items: center; gap: 6px;
  padding: 4.5px 12px;
  border-top: 1px solid rgba(255,255,255,.045);
  cursor: pointer;
}
.entity .col:hover { background: rgba(255,255,255,.05); }
.entity .col.hot { background: rgba(99,102,241,.22); }
.badge { font-size: 9px; font-weight: 700; padding: 1px 4px; border-radius: 4px; flex: none; font-family: var(--sans); }
.badge.pk { background: rgba(245,158,11,.2); color: var(--yellow); }
.badge.ai { background: rgba(16,185,129,.18); color: var(--ok); }
.badge.nn { background: rgba(239,68,68,.16); color: #f87171; }
.badge.idx { background: rgba(129,140,248,.16); color: var(--accent2); }
.badge.uq { background: rgba(14,165,233,.16); color: #38bdf8; }
.entity .col .cname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.entity .col .ctype { margin-left: auto; color: var(--muted); font-size: 11px; white-space: nowrap; }

/* ---------- SVG relationship ---------- */
.rel-path { stroke: var(--accent2); stroke-width: 2; fill: none; }
.rel-path.hot { stroke-width: 3.5; }
.rel-hit { stroke: transparent; stroke-width: 14; fill: none; cursor: pointer; }
.rel-label { fill: var(--text); font-size: 12px; font-family: var(--sans); paint-order: stroke; stroke: rgba(15,17,23,.9); stroke-width: 3px; }
.rel-arrow {
  fill: none; stroke: var(--accent2); stroke-width: 2;
}
.rel-dot { fill: #0f1117; stroke: var(--accent2); stroke-width: 2; }

/* ---------- Inspector ---------- */
#inspector {
  width: 324px; flex: none;
  background: var(--panel2);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 14px;
}
#inspector .insp-sec-head { display: flex; align-items: center; justify-content: space-between; margin: 10px 0 8px; }
#inspector .insp-sec-head:first-child { margin-top: 0; }
.inspector-sec-title { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: var(--muted); margin: 14px 0 8px; }
.inspector-sec-title:first-child { margin-top: 0; }
.sec-title { font-weight: 700; font-size: 13px; }
.inspector-empty-note { font-size: 12px; color: var(--muted); line-height: 1.6; background: var(--bg2); border: 1px dashed var(--border); border-radius: var(--radius); padding: 10px 12px; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.form-grid .full { grid-column: 1 / -1; }
#inspector label, .modal label { font-size: 11px; font-weight: 600; color: var(--muted); display: flex; flex-direction: column; gap: 5px; letter-spacing: .2px; }

input[type="text"], input[type="number"], input[type="url"], input:not([type]), select, textarea {
  background: var(--field);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 12px;
  font-family: var(--sans);
  width: 100%;
  transition: border-color .12s, box-shadow .12s, background .12s;
}
input:hover, select:hover, textarea:hover { border-color: var(--border-strong); }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(99,102,241,.2);
  background: var(--field-hover);
}
input::placeholder, textarea::placeholder { color: rgba(139,147,167,.55); }
select {
  appearance: none; -webkit-appearance: none;
  padding-right: 26px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%238b93a7' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 9px center;
  cursor: pointer;
}
select option { background: var(--panel); color: var(--text); }

label.check { flex-direction: row; align-items: center; gap: 6px; color: var(--text); font-size: 12px; font-weight: 500; cursor: pointer; letter-spacing: 0; }
label.check input[type="checkbox"] {
  appearance: none; -webkit-appearance: none;
  width: 16px; height: 16px; flex: none;
  margin: 0; padding: 0;
  background: var(--field);
  border: 1px solid var(--border); border-radius: 4px;
  display: inline-grid; place-items: center;
  cursor: pointer; transition: background .12s, border-color .12s;
}
label.check input[type="checkbox"]:hover { border-color: var(--accent2); }
label.check input[type="checkbox"]:checked { background: var(--accent); border-color: var(--accent); }
label.check input[type="checkbox"]:checked::after {
  content: "✓"; color: #fff; font-size: 11px; font-weight: 800; line-height: 1;
}
label.check input[type="checkbox"]:focus-visible { box-shadow: 0 0 0 3px rgba(99,102,241,.3); }

.stats { display: flex; gap: 14px; font-size: 12px; color: var(--muted); flex-wrap: wrap; }
.stats span { color: var(--text); font-weight: 700; }

.color-row { display: flex; gap: 6px; flex-wrap: wrap; }
.color-row .swatch {
  width: 20px; height: 20px; border-radius: 50%; cursor: pointer;
  border: 2px solid transparent; flex: none;
  transition: transform .1s, box-shadow .1s;
}
.color-row .swatch:hover { transform: scale(1.15); }
.color-row .swatch.selected { border-color: #fff; box-shadow: 0 0 0 2px rgba(0,0,0,.6); }

/* column editor table */
.col-table { display: flex; flex-direction: column; gap: 10px; }
.col-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  display: flex; flex-direction: column; gap: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,.22);
}
.col-card.hot { border-color: var(--accent); border-left-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), 0 4px 16px rgba(99,102,241,.18); }
.col-card .row1 { display: flex; gap: 6px; align-items: flex-end; }
.col-card .row1 label.lbl-name { flex: 1; }
.col-card .row1 input { font-size: 12.5px; font-weight: 600; }
.col-card .move { display: flex; flex-direction: column; gap: 2px; padding-bottom: 1px; }
.col-card .mini {
  background: transparent; border: 1px solid transparent; color: var(--muted);
  width: 22px; height: 18px; border-radius: 4px; cursor: pointer; font-size: 10px; line-height: 1;
  transition: color .12s, border-color .12s, background .12s;
}
.col-card .mini:hover { color: var(--accent2); border-color: var(--border); background: var(--field); }
.col-card .row2 { display: flex; gap: 8px; align-items: stretch; justify-content: space-between; }
.col-card .row2 label { flex: 1; min-width: 0; }
.col-card .row2 label.lbl-type { flex: 1.4; }
.col-card .del {
  align-self: stretch;
  background: transparent; border: 1px solid transparent; color: var(--muted);
  border-radius: 6px; cursor: pointer; padding: 3px 7px; font-size: 12px;
  transition: color .12s, border-color .12s, background .12s;
}
.col-card .del:hover { color: var(--danger); border-color: rgba(239,68,68,.4); background: rgba(239,68,68,.08); }
.flags { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; padding-top: 2px; border-top: 1px dashed var(--border); }
.flags .check { position: relative; gap: 0; padding: 0; border: none; background: none; }
.flags .check input[type="checkbox"] {
  position: absolute; top: 0; left: 0; opacity: 0; width: 1px; height: 1px; margin: 0;
  pointer-events: none;
}
.flags .check span {
  display: inline-block; padding: 4px 11px;
  border: 1px solid var(--border); border-radius: 999px;
  color: var(--muted); font-size: 11px; font-weight: 700;
  user-select: none;
}
.flags .check:hover span { border-color: var(--border-strong); color: var(--text); }
.flags .check:focus-within span { outline: 2px solid var(--accent); outline-offset: 2px; }
.flags .check.on span {
  color: var(--text);
  background: var(--field-hover);
  border-color: var(--border-strong);
}

.rel-info {
  font-size: 12px; color: var(--muted);
  background: var(--panel); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  border-radius: var(--radius); padding: 10px 12px; line-height: 1.7; margin-top: 12px;
  box-shadow: 0 2px 10px rgba(0,0,0,.22);
}
.rel-info code { color: var(--accent2); }

/* ---------- Buttons ---------- */
.btn {
  background: var(--bg2); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 12px; font-size: 12px; cursor: pointer; font-family: var(--sans);
}
.btn:hover { border-color: var(--accent); }
.btn.small { padding: 3px 8px; font-size: 11px; }
.btn.accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.accent:hover { background: var(--accent2); }
.icon-btn {
  background: transparent; border: 1px solid transparent; color: var(--muted);
  width: 26px; height: 26px; border-radius: 6px; cursor: pointer;
  display: grid; place-items: center; font-size: 16px; line-height: 1;
}
.icon-btn:hover { color: var(--danger); border-color: var(--border); background: var(--bg2); }

/* ---------- Modal ---------- */
.modal {
  position: fixed; inset: 0; z-index: 50;
  background: rgba(5,6,10,.6);
  display: grid; place-items: center;
  backdrop-filter: blur(3px);
}
.modal-box {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; width: 460px; max-width: 94vw;
  padding: 18px; max-height: 88vh; overflow: auto;
  box-shadow: 0 24px 60px rgba(0,0,0,.5);
}
.modal-box.wide { width: 760px; }
.modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.modal-actions { display: flex; gap: 8px; align-items: center; }
.modal-footer { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
#sql-output {
  width: 100%; height: 46vh;
  font-family: var(--mono); font-size: 12px; line-height: 1.55;
  background: var(--panel2); border: 1px solid var(--border); border-radius: var(--radius);
  color: #d7f7e3; padding: 12px; resize: vertical; white-space: pre;
}
.sql-warn { color: var(--yellow); font-size: 12px; margin-top: 8px; min-height: 16px; }
.rel-created { background: var(--bg2); border-radius: var(--radius); padding: 8px 10px; font-size: 12px; margin-bottom: 12px; line-height: 1.6; }
.rel-created code { color: var(--accent2); }
.row { display: flex; gap: 8px; }
.row input { flex: 1; }
.row select { width: 42%; }

/* ---------- Statusbar ---------- */
#statusbar {
  height: var(--statusbar-h);
  display: flex; align-items: center; gap: 12px;
  padding: 0 12px; font-size: 11.5px; color: var(--muted);
  background: var(--panel2); border-top: 1px solid var(--border);
}
#statusbar .spacer { flex: 1; }

/* scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #2c3446; border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: #38415a; }
::-webkit-scrollbar-track { background: transparent; }