:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface2: #21253a;
  --border: #2a3040;
  --text: #e0e6f0;
  --dim: #8892a4;
  --accent: #6c8ebf;
  --accent2: #82b4f0;
  --green: #4caf7d;
  --red: #e06c75;
  --yellow: #e5c07b;
  --purple: #c678dd;
  --orange: #d19a66;
  --teal: #56b6b2;

  --blk-load: #3b6ea5;
  --blk-store: #a5653b;
  --blk-lr: #2f8f8a;
  --blk-sc: #8a4fae;
  --blk-fence: #3f8f5f;
  --blk-amo: #b0475f;
}

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

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  font-size: 14px;
}

/* ---------- Top bar ---------- */
#topbar {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 10px 18px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
#topbar h1 { font-size: 15px; color: var(--accent2); letter-spacing: 0.3px; margin-right: 6px; }
#topbar h1 span { color: var(--dim); font-weight: 400; font-size: 12px; }

.control {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--dim);
}
.control select, .control input[type=text] {
  background: var(--surface2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 4px 8px;
  font-size: 12px;
}
.stepper { display: flex; align-items: center; gap: 4px; }
.stepper button {
  width: 22px; height: 22px; border-radius: 5px; border: 1px solid var(--border);
  background: var(--surface2); color: var(--text); cursor: pointer; font-size: 13px;
}
.stepper button:hover { border-color: var(--accent); }
.stepper .count { min-width: 16px; text-align: center; color: var(--text); }

button.primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 7px 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}
button.primary:hover { background: var(--accent2); }
button.ghost {
  background: transparent;
  color: var(--dim);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 14px;
  font-size: 12px;
  cursor: pointer;
}
button.ghost:hover { color: var(--text); border-color: var(--accent); }

#model-note { flex-basis: 100%; font-size: 11.5px; color: var(--dim); line-height: 1.5; padding-top: 2px; }
#model-note b { color: var(--text); }

/* ---------- Body layout ---------- */
#body {
  flex: 1;
  display: flex;
  overflow: hidden;
}

/* Palette */
#palette {
  width: 180px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 12px 10px;
  overflow-y: auto;
}
#palette h2 { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: var(--dim); margin-bottom: 8px; }
.palette-item {
  cursor: grab;
  border-radius: 7px;
  padding: 9px 10px;
  margin-bottom: 8px;
  font-size: 12.5px;
  font-weight: 600;
  color: #fff;
  user-select: none;
  box-shadow: inset 0 -2px 0 rgba(0,0,0,0.2);
}
.palette-item small { display: block; font-weight: 400; opacity: 0.85; font-size: 10.5px; margin-top: 2px; }
.palette-item.load  { background: var(--blk-load); }
.palette-item.store { background: var(--blk-store); }
.palette-item.lr    { background: var(--blk-lr); }
.palette-item.sc    { background: var(--blk-sc); }
.palette-item.fence { background: var(--blk-fence); }
.palette-item.amo   { background: var(--blk-amo); }
#palette-hint { font-size: 11px; color: var(--dim); line-height: 1.6; margin-top: 10px; }

/* Locations manager */
#locations-box { margin-top: 16px; border-top: 1px solid var(--border); padding-top: 12px; }
#locations-box h2 { font-size: 11px; text-transform: uppercase; letter-spacing: 1px; color: var(--dim); margin-bottom: 8px; }
.loc-chip {
  display: inline-flex; align-items: center; gap: 5px;
  background: var(--surface2); border: 1px solid var(--border); border-radius: 12px;
  padding: 3px 8px; margin: 0 5px 6px 0; font-size: 12px; font-family: monospace;
}
.loc-chip .init { color: var(--dim); }
.loc-chip button { background: none; border: none; color: var(--dim); cursor: pointer; font-size: 12px; line-height: 1; }
.loc-chip button:hover { color: var(--red); }
#add-loc-row { display: flex; gap: 5px; margin-top: 6px; }
#add-loc-row input { width: 46px; }
#add-loc-row input:last-of-type { width: 44px; }

/* Center: thread columns */
#threads-area {
  flex: 1;
  overflow: auto;
  padding: 16px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.thread-col {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  width: 220px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  min-height: 220px;
}
.thread-col.selected { border-color: var(--accent2); box-shadow: 0 0 0 1px var(--accent2); }

.thread-col-header {
  padding: 9px 12px;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent2);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.thread-col-header button {
  background: none; border: none; color: var(--dim); cursor: pointer; font-size: 13px;
}
.thread-col-header button:hover { color: var(--red); }
.thread-list {
  flex: 1;
  padding: 10px;
  min-height: 140px;
}
.thread-list.drag-hover { background: rgba(108,142,191,0.06); }

.block {
  border-radius: 7px;
  padding: 8px 10px;
  margin-bottom: 7px;
  color: #fff;
  font-size: 12px;
  cursor: grab;
  position: relative;
  box-shadow: inset 0 -2px 0 rgba(0,0,0,0.2);
}
.block.insert-before { box-shadow: 0 -3px 0 var(--yellow), inset 0 -2px 0 rgba(0,0,0,0.2); }
.thread-list.insert-at-end .block:last-child { box-shadow: 0 3px 0 var(--yellow), inset 0 -2px 0 rgba(0,0,0,0.2); }
.block.load  { background: var(--blk-load); }
.block.store { background: var(--blk-store); }
.block.lr    { background: var(--blk-lr); }
.block.sc    { background: var(--blk-sc); }
.block.fence { background: var(--blk-fence); }
.block.amo   { background: var(--blk-amo); }

.block-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 5px; font-weight: 700; }
.block-top .del { cursor: pointer; opacity: 0.8; font-size: 12px; }
.block-top .del:hover { opacity: 1; color: #2a0000; }

.block-row { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; margin-top: 4px; font-size: 11.5px; }
.block select, .block input[type=number], .block input[type=text] {
  background: rgba(0,0,0,0.25);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff;
  border-radius: 4px;
  padding: 2px 5px;
  font-size: 11.5px;
}
.block input[type=number] { width: 48px; }
.block input[type=text] { width: 40px; }
.block label.flag { display: flex; align-items: center; gap: 2px; cursor: pointer; }
.block .mini { opacity: 0.75; font-size: 10.5px; }
.block .fence-grp { display: flex; align-items: center; gap: 3px; background: rgba(0,0,0,0.2); border-radius: 4px; padding: 2px 5px; }

.empty-hint { color: var(--dim); font-size: 11.5px; text-align: center; padding: 24px 6px; line-height: 1.6; }

/* ---------- Results resizer ---------- */
#results-resizer {
  width: 6px;
  flex-shrink: 0;
  cursor: col-resize;
  background: transparent;
  position: relative;
}
#results-resizer::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0; left: 2px;
  width: 2px;
  background: var(--border);
}
#results-resizer:hover::after,
#results-resizer.dragging::after {
  background: var(--accent2);
}

/* ---------- Results pane (right side) ---------- */
#results-pane {
  width: 460px;
  min-width: 220px;
  max-width: 80vw;
  flex-shrink: 0;
  background: var(--surface);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
#results-pane h2 { font-size: 13px; color: var(--accent2); padding: 12px 16px 6px; flex-shrink: 0; }
#results-body { flex: 1; display: flex; flex-direction: column; overflow: hidden; padding: 0 16px 14px; min-height: 0; }
#placeholder-results { color: var(--dim); font-size: 12.5px; line-height: 1.6; }

#results-summary { font-size: 12px; color: var(--dim); margin-bottom: 8px; flex-shrink: 0; line-height: 1.6; }
#results-summary b { color: var(--text); }
.warn-box {
  background: rgba(224,108,117,0.1); border-left: 3px solid var(--red);
  padding: 6px 10px; font-size: 11.5px; border-radius: 5px; margin-bottom: 10px; color: var(--text);
  flex-shrink: 0;
}

/* All possible global orders, lined up side by side, scrollable */
#results-strip {
  flex: 1;
  min-height: 0;
  display: flex;
  gap: 12px;
  overflow-x: auto;
  overflow-y: auto;
  align-items: flex-start;
  padding-bottom: 6px;
}
.order-card {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 11px;
  width: 220px;
  flex-shrink: 0;
}
.order-card .order-head {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 11px; color: var(--dim); margin-bottom: 7px;
}
.order-card .steps { display: flex; flex-direction: column; gap: 4px; margin-bottom: 8px; }
.order-card .step {
  display: flex; align-items: baseline; gap: 5px;
  padding: 3px 7px; border-radius: 5px; color: #fff; font-size: 11px; line-height: 1.4;
}
.order-card .step .cpu-tag { font-weight: 700; opacity: 0.9; flex-shrink: 0; }
.order-card .step .phase-tag { opacity: 0.75; font-size: 9.5px; }
.order-card .step.load  { background: var(--blk-load); }
.order-card .step.store { background: var(--blk-store); }
.order-card .step.lr    { background: var(--blk-lr); }
.order-card .step.sc    { background: var(--blk-sc); }
.order-card .step.fence { background: var(--blk-fence); }
.order-card .step.amo   { background: var(--blk-amo); }

.order-card .divider { border-top: 1px dashed var(--border); margin: 6px 0; }
.order-card .final-regs { font-family: monospace; font-size: 11.5px; color: var(--text); margin-bottom: 4px; line-height: 1.5; }
.order-card .final-mem { font-family: monospace; font-size: 11px; color: var(--dim); margin-bottom: 7px; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 11px; font-weight: 600; }
.badge.ok { background: rgba(76,175,125,0.15); color: var(--green); }
.badge.weak { background: rgba(224,108,117,0.15); color: var(--red); }