/* workspace.css : layout and look of the workspace page (app.html).
   Rail | Tables sidebar | Center (tabs + results) | Chat panel. */

body.workspace {
  display: grid;
  grid-template-columns: 52px 220px minmax(0, 1fr) 380px;
  height: 100vh;
  overflow: hidden;
  background: var(--surface);
}
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
[hidden] { display: none !important; }
.small { font-size: 12px; }
.mono { font-family: var(--font-mono); font-size: 12px; }
.nowrap { white-space: nowrap; }
.pad { padding: 20px; }

/* ---------- Icon rail ---------- */
.rail {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 12px 0; background: var(--bg); border-right: 1px solid var(--border);
}
.rail-logo { display: grid; place-items: center; height: 36px; margin-bottom: 10px; }
.rail-btn {
  display: grid; place-items: center; width: 36px; height: 36px;
  border: 0; border-radius: var(--radius); background: transparent; color: var(--muted); cursor: pointer;
}
.rail-btn svg { width: 19px; height: 19px; }
.rail-btn:hover { background: var(--surface-2); color: var(--heading); }
.rail-btn.active { background: var(--accent-soft); color: var(--accent); }
.rail-bottom { margin-top: auto; }

/* ---------- Tables sidebar ---------- */
.sidebar { background: var(--bg); border-right: 1px solid var(--border); padding: 14px 10px; overflow-y: auto; }
.sidebar-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 6px 8px; font-size: 12px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted);
}
.icon-btn { display: grid; place-items: center; width: 26px; height: 26px; border: 0; border-radius: 6px; background: transparent; color: var(--muted); cursor: pointer; }
.icon-btn svg { width: 15px; height: 15px; }
.icon-btn:hover { background: var(--surface-2); color: var(--heading); }
.table-list { list-style: none; margin: 0; padding: 0; }
.table-item {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 7px 8px; border-radius: 6px; cursor: pointer; font-size: 13.5px;
}
.table-item:hover { background: var(--surface-2); }
.table-meta { font-size: 11.5px; color: var(--faint); }

/* ---------- Center column ---------- */
.center { display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--surface); }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  height: 48px; padding: 0 20px; border-bottom: 1px solid var(--border);
}
.crumbs { white-space: nowrap; display: flex; align-items: center; gap: 8px; font-size: 13.5px; }
.sep { color: var(--faint); }
.tabs { display: flex; gap: 4px; padding: 8px 20px 0; border-bottom: 1px solid var(--border); }
.tab {
  padding: 8px 12px; border: 0; border-bottom: 2px solid transparent; margin-bottom: -1px;
  background: transparent; color: var(--muted); font: 500 13.5px var(--font); cursor: pointer;
}
.tab:hover { color: var(--heading); }
.tab.active { color: var(--heading); border-bottom-color: var(--accent); }
.tab-body { flex: 1; min-height: 0; overflow: auto; background: var(--bg); }
.view { padding: 20px; }
#view-log, #view-er { padding: 0; }

/* ---------- Chips ---------- */
.chip {
  display: inline-block; padding: 2px 8px; border-radius: 6px;
  font-size: 11.5px; font-weight: 500; white-space: nowrap;
  background: var(--surface-2); color: #525252;
}
.chip-blue { background: var(--accent-soft); color: var(--accent); }
.chip-green { background: var(--green-soft); color: var(--green); }
.chip-amber { background: var(--amber-soft); color: var(--amber); }
.chip-red { background: var(--red-soft); color: var(--red); }
.chip-purple { background: var(--purple-soft); color: var(--purple); }
.chip-link { background: var(--purple-soft); color: var(--purple); font-family: var(--font-mono); }

/* ---------- Diagram toolbar + legend (both tabs) ---------- */
#view-schema, #view-er { padding: 0; min-height: 100%; display: flex; flex-direction: column; }
#view-schema[hidden], #view-er[hidden] { display: none; }
.diagram-toolbar {
  position: sticky; top: 0; left: 0; z-index: 3;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 10px 16px; background: rgba(248, 248, 250, 0.92); backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}
.diagram-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 12px; color: var(--muted); }
.legend-item { display: inline-flex; align-items: center; gap: 6px; }
.legend-symbol { color: var(--heading); font-size: 13px; }
.toolbar-actions { display: flex; align-items: center; gap: 10px; }
.zoom { display: inline-flex; align-items: center; gap: 4px; }
.zoom-btn {
  width: 30px; height: 30px; border-radius: var(--radius); cursor: pointer;
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--heading); font: 500 16px/1 var(--font);
}
.zoom-btn:hover { background: var(--surface-2); }
.zoom-label { min-width: 44px; text-align: center; font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.zoom .btn { margin-left: 6px; }

/* ---------- Schema visualizer (table cards on a grid) ---------- */
.schema-canvas {
  position: relative; flex: 1 0 auto; min-width: 100%;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 32px 32px;
}
.schema-lines { position: absolute; inset: 0; pointer-events: none; overflow: visible; }
.rel-line { fill: none; stroke: #8a8a93; stroke-width: 1.6; stroke-dasharray: 7 6; transition: stroke 0.15s; }
.rel-end { fill: #8a8a93; }
.rel.hot .rel-line { stroke: var(--accent); stroke-width: 2.2; }
.rel.hot .rel-end { fill: var(--accent); }

.erd-card {
  position: absolute; width: 300px; z-index: 1;
  background: var(--surface); border: 1px solid var(--border-strong); border-radius: 10px;
  overflow: hidden; box-shadow: var(--shadow); scroll-margin: 80px;
  transition: box-shadow 0.3s, border-color 0.3s;
}
.erd-card:hover { border-color: #b9c7f5; }
.erd-card.flash { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft), var(--shadow); }
.erd-head {
  height: 40px; display: flex; align-items: center; justify-content: center;
  background: var(--accent); color: #fff; font-weight: 600; font-size: 14px; letter-spacing: 0.01em;
  cursor: grab; user-select: none; touch-action: none;
}
.erd-head:active { cursor: grabbing; }
.erd-row {
  height: 36px; display: flex; align-items: center; gap: 10px; padding: 0 14px;
  border-top: 1px solid var(--surface-2); font-size: 13.5px;
}
.erd-row:nth-child(odd) { background: #fbfbfc; }
.erd-row.is-fk .erd-name { color: var(--accent); }
.erd-icons { display: inline-flex; align-items: center; gap: 6px; width: 40px; flex: none; color: var(--heading); }
.erd-key { width: 16px; font-size: 12px; text-align: center; }
.erd-null { font-size: 12px; }
.erd-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--heading); }
.erd-type { font-family: var(--font-mono); font-size: 12px; color: var(--muted); }

/* ---------- Empty state ---------- */
.empty { grid-column: 1 / -1; display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 60px 20px; text-align: center; }
.empty p { margin: 0; }
.empty-title { font-size: 24px; }
.empty .btn { margin-top: 8px; }

/* ---------- ER diagram (Chen notation) ---------- */
.chen-box { flex: 1 0 auto; padding: 24px; display: flex; justify-content: center; align-items: center; background: var(--surface); }
.chen { max-width: 100%; height: auto; font-family: var(--font); }
.chen-box.zoomed { justify-content: flex-start; align-items: flex-start; }
.chen-box.zoomed .chen { max-width: none; flex: none; }
.chen text { text-anchor: middle; dominant-baseline: middle; }
.chen-line { stroke: #8a8a93; stroke-width: 1.4; }
.chen-line.double-outer { stroke: #55555c; stroke-width: 7; }
.chen-line.double-inner { stroke: var(--surface); stroke-width: 3.4; }
.chen-entity rect { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 1.6; }
.chen-entity text { font-size: 14px; font-weight: 600; fill: var(--heading); letter-spacing: 0.03em; }
.chen-attr ellipse { fill: var(--surface); stroke: #9a9aa3; stroke-width: 1.3; }
.chen-attr text { font-size: 13px; font-weight: 500; fill: var(--text); }
.chen-attr.key text { text-decoration: underline; font-weight: 600; }
.chen-attr.key ellipse { stroke: var(--accent); }
.chen-rel polygon { fill: var(--purple-soft); stroke: var(--purple); stroke-width: 1.6; }
.chen-rel text { font-size: 13px; font-weight: 600; fill: var(--heading); }
.chen-rel .chen-caption { font-family: var(--font-mono); font-size: 11px; font-weight: 400; fill: var(--muted); }
.chen-card { font-size: 14px; font-weight: 600; fill: var(--heading); }
.chen-attr, .chen-rel, .chen-entity { cursor: default; }

/* ---------- Data tables (log + results) ---------- */
.data-table { width: 100%; border-collapse: collapse; background: var(--surface); font-size: 13px; }
.data-table th {
  position: sticky; top: 0; z-index: 1; text-align: left; padding: 8px 14px;
  background: var(--surface); border-bottom: 1px solid var(--border);
  font-size: 11.5px; font-weight: 500; color: var(--muted); white-space: nowrap;
}
.data-table td { padding: 8px 14px; border-bottom: 1px solid var(--surface-2); vertical-align: top; }
.data-table tbody tr:hover { background: #fafafb; }
.sql-cell { min-width: 220px; max-width: 340px; word-break: break-word; }
.null-cell { color: var(--faint); font-style: italic; }

/* ---------- Results drawer ---------- */
.results { height: 260px; display: flex; flex-direction: column; border-top: 1px solid var(--border-strong); background: var(--surface); }
.results-head { display: flex; align-items: center; gap: 12px; padding: 10px 16px; border-bottom: 1px solid var(--border); }
.results-sql { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 12px; color: var(--muted); }
.results-table { flex: 1; overflow: auto; }

/* ---------- Chat panel ---------- */
.chat { display: flex; flex-direction: column; min-height: 0; background: var(--surface); border-left: 1px solid var(--border); }
.chat-head { display: flex; align-items: center; justify-content: space-between; height: 48px; padding: 0 16px; border-bottom: 1px solid var(--border); }
.chat-title { display: flex; align-items: center; gap: 8px; }
.model-chip { padding: 2px 8px; border: 1px solid var(--border); border-radius: 999px; font-size: 11.5px; color: var(--muted); }
.conn { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); }
.conn .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--faint); }
.conn.online .dot { background: var(--green); box-shadow: 0 0 0 3px var(--green-soft); }

.messages { flex: 1; min-height: 0; overflow-y: auto; display: flex; flex-direction: column; gap: 12px; padding: 16px; }
.hint { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; margin: auto 0; }
.hint p { margin: 0; }
.hint-title { font-size: 22px; }
.example {
  padding: 8px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface);
  font: 13.5px var(--font); color: var(--text); text-align: left; cursor: pointer;
}
.example:hover { border-color: var(--accent); background: var(--accent-soft); }

.bubble { max-width: 88%; padding: 8px 12px; border-radius: 14px; font-size: 14px; word-wrap: break-word; }
.bubble.user { align-self: flex-end; background: var(--surface-2); border-bottom-right-radius: 4px; }
.bubble.assistant { align-self: flex-start; padding-left: 0; }
.bubble:empty { display: none; }
.note { align-self: center; font-size: 12px; color: var(--muted); }

.sql-card { padding: 10px 12px; font-size: 13px; }
.sql-card.done { opacity: 0.85; }
.sql-card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.sql-code { margin: 0; padding: 8px 10px; border-radius: 6px; background: var(--surface-2); font-size: 12px; white-space: pre-wrap; word-break: break-word; }
.confirm-card.is-write { border-color: #f3d9a6; }
.confirm-card.is-danger { border-color: #f3b4b4; }
.confirm-buttons { display: flex; gap: 8px; margin-top: 10px; }
.error-text { margin: 8px 0 0; color: var(--red); font-size: 12.5px; }
.ok-text { color: var(--green); }
.card-status { margin: 8px 0 0; font-size: 12.5px; font-weight: 500; }

/* ---------- Composer + orb ---------- */
.composer-wrap { padding: 12px 16px 14px; display: flex; flex-direction: column; gap: 10px; }
.composer { padding: 10px 12px; }
.composer:focus-within { border-color: var(--accent); }
.composer textarea { width: 100%; border: 0; outline: 0; resize: none; background: transparent; font: 14px var(--font); color: var(--text); }
.composer-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.mic-note { font-size: 12px; color: var(--amber); }
.send-btn { display: grid; place-items: center; width: 30px; height: 30px; margin-left: auto; border: 0; border-radius: 50%; background: var(--heading); color: #fff; cursor: pointer; }
.send-btn svg { width: 16px; height: 16px; stroke-width: 2.4; }
.send-btn:hover { background: var(--accent); }

.orb-area { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.orb-status { font-size: 12.5px; color: var(--muted); margin-top: 10px; position: relative; z-index: 1; }
.orb {
  --level: 0;
  width: 64px; height: 64px; border: 0; border-radius: 50%; cursor: pointer;
  background: conic-gradient(from 0deg, #2563eb, #7c5cff, #ec6cb9, #38bdf8, #2563eb);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3), inset 0 0 12px rgba(255, 255, 255, 0.5);
  transform: scale(calc(1 + var(--level) * 0.25));
  transition: box-shadow 0.2s, filter 0.2s;
  animation: orb-spin 8s linear infinite;
}
.orb:hover { filter: brightness(1.08); }
.orb.idle { animation-duration: 14s; }
.orb.connecting { animation-duration: 1.2s; opacity: 0.7; }
.orb.thinking { animation-duration: 1.6s; filter: saturate(1.3); }
.orb.listening { box-shadow: 0 0 0 calc(4px + var(--level) * 14px) rgba(37, 99, 235, 0.18), 0 6px 20px rgba(37, 99, 235, 0.35); }
.orb.speaking { animation-duration: 3s; box-shadow: 0 0 0 calc(4px + var(--level) * 14px) rgba(236, 108, 185, 0.2), 0 6px 20px rgba(236, 108, 185, 0.35); }
@keyframes orb-spin { to { background: conic-gradient(from 360deg, #2563eb, #7c5cff, #ec6cb9, #38bdf8, #2563eb); } }

/* ---------- Small screens: stack the chat below, hide rail + sidebar ---------- */
@media (max-width: 900px) {
  body.workspace { display: flex; flex-direction: column; height: auto; min-height: 100vh; overflow: auto; }
  .rail, .sidebar { display: none; }
  .center { min-height: 70vh; }
  .tab-body { max-height: 60vh; }
  .results { height: 220px; }
  .chat { height: 85vh; border-left: 0; border-top: 1px solid var(--border-strong); }
  .tabs { overflow-x: auto; padding: 8px 12px 0; }
  .topbar { padding: 0 12px; }
}