/* The [hidden] attribute must win over class display rules (e.g. .sbc-prompt's
   display:flex), otherwise hidden-by-default panels stay visible. */
[hidden] { display: none !important; }

/* ---- layout ---- */
body { margin: 0; min-height: 100vh; display: flex; flex-direction: column; }
.sbc-layout {
  display: grid;
  grid-template-columns: 200px 1fr 240px;
  grid-template-rows: auto 1fr 1fr;
  height: 100vh;
  overflow: hidden;
}
.sbc-header       { grid-column: 1 / -1; grid-row: 1; }
.sbc-sidebar      { grid-column: 1;      grid-row: 2 / 4; }
.sbc-canvas       { grid-column: 2;      grid-row: 2; }
.sbc-control-path { grid-column: 2;      grid-row: 3; }
.sbc-results      { grid-column: 3;      grid-row: 2 / 4; }
.sbc-header {
  grid-column: 1 / -1;
  padding: .7rem 1.2rem;
  border-bottom: 1px solid rgba(128,128,128,.2);
  display: flex; align-items: center; gap: 1rem;
  flex-wrap: wrap;
}
.sbc-header h1 { font-size: 1.1rem; margin: 0; }
.sbc-status {
  margin-left: auto; font-size: .75rem; opacity: .55;
  font-style: italic;
}

/* ---- sidebar ---- */
.sbc-sidebar {
  border-right: 1px solid rgba(128,128,128,.2);
  padding: .8rem;
  overflow-y: auto;
  display: flex; flex-direction: column; gap: 1.2rem;
}
.sbc-sidebar h3 {
  font-size: .7rem; text-transform: uppercase; letter-spacing: .08em;
  opacity: .55; margin: 0 0 .4rem;
}
.sbc-chips { display: flex; flex-wrap: wrap; gap: .4rem; }
.sbc-chip {
  padding: .35rem .6rem; border-radius: 6px; font-size: .78rem; font-weight: 600;
  cursor: grab; user-select: none;
  border: 1px solid rgba(128,128,128,.35);
  background: rgba(128,128,128,.1);
  transition: background .15s;
}
.sbc-chip:hover { background: rgba(128,128,128,.22); }
.sbc-chip[data-drag="disk"]         { border-color: rgba(52,152,219,.5);  background: rgba(52,152,219,.12); }
.sbc-chip[data-drag="segmentation"] { border-color: rgba(155,89,182,.5);  background: rgba(155,89,182,.12); }
.sbc-chip[data-drag="redundancy"]   { border-color: rgba(46,204,113,.5);  background: rgba(46,204,113,.12); }

/* ---- canvas area ---- */
/* Layer labels via ::before so render() clearing innerHTML doesn't remove them */
.sbc-canvas, .sbc-physical { position: relative; }
.sbc-canvas::before, .sbc-physical::before {
  position: absolute; top: .5rem; right: .7rem;
  font-size: .62rem; text-transform: uppercase; letter-spacing: .09em;
  opacity: .35; pointer-events: none; z-index: 1;
}
.sbc-canvas::before   { content: 'data layer'; }
.sbc-physical::before { content: 'physical layer'; }

.sbc-canvas {
  margin: .6rem .6rem .3rem .6rem;
  border: 2px dashed rgba(128,128,128,.3);
  border-radius: 10px;
  padding: 1.2rem;
  overflow: auto;
  display: flex; flex-wrap: wrap; gap: 1rem; align-content: flex-start;
  background: repeating-linear-gradient(
    0deg, transparent, transparent 31px,
    rgba(128,128,128,.06) 31px, rgba(128,128,128,.06) 32px
  ),
  repeating-linear-gradient(
    90deg, transparent, transparent 31px,
    rgba(128,128,128,.06) 31px, rgba(128,128,128,.06) 32px
  );
}
.sbc-canvas.sbc--over        { border-color: rgba(52,152,219,.6); }
.sbc-control-path.cp--active { border-color: rgba(52,152,219,.6); }

/* ---- canvas nodes ---- */
.sbc-disk {
  position: relative;
  padding: .5rem 1.6rem .5rem .75rem; border-radius: 8px; font-size: .8rem; font-weight: 600;
  cursor: grab; user-select: none;
  background: rgba(52,152,219,.18); border: 1px solid rgba(52,152,219,.45);
  transition: background .12s, box-shadow .12s;
  white-space: nowrap;
}
.sbc-disk:hover  { background: rgba(52,152,219,.28); }
.sbc-disk.sbc--over { box-shadow: 0 0 0 2px rgba(52,152,219,.8); }

.sbc-array {
  position: relative;
  border: 2px solid rgba(155,89,182,.5); border-radius: 10px;
  padding: .6rem; padding-top: 1.4rem; min-width: 140px;
  background: rgba(155,89,182,.07);
  display: flex; flex-direction: column; gap: .5rem;
}
.sbc-array.sbc--over { border-color: rgba(155,89,182,.9); background: rgba(155,89,182,.14); }

/* Delete / dissolve button — visible on hover */
.sbc-delete {
  position: absolute; top: 4px; right: 4px;
  width: 18px; height: 18px; line-height: 18px;
  font-size: .75rem; text-align: center;
  border-radius: 50%; border: none; cursor: pointer;
  background: rgba(231,76,60,.7); color: #fff;
  opacity: 0; transition: opacity .15s; padding: 0;
}
.sbc-disk:hover  > .sbc-delete,
.sbc-array:hover > .sbc-delete { opacity: 1; }

/* Inline variant for slot clear buttons */
.sbc-delete--inline {
  position: static; display: inline-block;
  width: 14px; height: 14px; line-height: 14px; font-size: .65rem;
  margin-left: .25rem; vertical-align: middle;
  opacity: 0;
}
.sbc-slot--filled:hover .sbc-delete--inline { opacity: 1; }

.sbc-slots { display: flex; gap: .4rem; }
.sbc-slot {
  flex: 1; padding: .3rem .5rem; border-radius: 6px;
  font-size: .72rem; font-weight: 600; text-align: center;
  transition: background .12s;
}
.sbc-slot--empty {
  border: 1.5px dashed rgba(128,128,128,.4);
  background: rgba(128,128,128,.06);
}
.sbc-slot--empty.sbc-slot--over {
  border-color: rgba(255,255,255,.6); background: rgba(255,255,255,.08);
}
.sbc-slot-hint { opacity: .5; font-style: italic; }
.sbc-slot--filled[data-axis="segmentation"] { background: rgba(155,89,182,.25); border: 1.5px solid rgba(155,89,182,.5); }
.sbc-slot--filled[data-axis="redundancy"]   { background: rgba(46,204,113,.2);  border: 1.5px solid rgba(46,204,113,.45); }
.sbc-slot--filled[data-axis="algorithm"]    { background: rgba(230,126,34,.18); border: 1.5px solid rgba(230,126,34,.5); }
.sbc-slot--empty[data-axis="algorithm"]     { border-color: rgba(230,126,34,.3); }

.sbc-chip[data-drag="algorithm"]  { border-color: rgba(230,126,34,.5);  background: rgba(230,126,34,.12); }
.sbc-chip[data-drag="component"] { border-color: rgba(149,165,166,.5); background: rgba(149,165,166,.12); }

/* ---- physical layer canvas ---- */
.sbc-physical {
  grid-column: 2; grid-row: 3;
  margin: .3rem .6rem .6rem .6rem;
  border: 2px dashed rgba(128,128,128,.3);
  border-radius: 10px;
  background: rgba(0,0,0,.05);
  overflow: hidden;
}
.sbc-physical.cp--active { border-color: rgba(52,152,219,.6); }
/* inner canvas + SVG overlay */
.pln-canvas {
  position: relative; width: 100%; height: 100%;
  min-height: 160px;
}
.pln-svg {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none; overflow: visible;
}
/* component nodes */
.pln-node {
  position: absolute; display: inline-flex; align-items: center; gap: .35rem;
  padding: .4rem .65rem;
  background: rgba(30,30,30,.85);
  border: 1.5px solid var(--node-color, rgba(128,128,128,.5));
  border-radius: 8px; font-size: .78rem; font-weight: 600;
  cursor: grab; user-select: none; white-space: nowrap;
}
/* disk nodes (the shared atom, mirrored from the data view) */
.pln-disk { background: rgba(52,152,219,.22); }
.pln-icon  { font-size: .95rem; line-height: 1; }
.pln-badge {
  font-size: .6rem; padding: .1rem .3rem; border-radius: 4px;
  background: rgba(231,76,60,.3); border: 1px solid rgba(231,76,60,.5);
  color: #e74; font-weight: 700;
}
.pln-delete {
  position: absolute; top: -6px; right: -6px;
  width: 16px; height: 16px; line-height: 16px; text-align: center;
  border-radius: 50%; border: none; cursor: pointer; font-size: .7rem;
  background: rgba(231,76,60,.75); color: #fff;
  opacity: 0; transition: opacity .15s; padding: 0;
}
.pln-node:hover .pln-delete { opacity: 1; }
/* port dots */
.pln-port {
  position: absolute; width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,.25); border: 1.5px solid rgba(255,255,255,.4);
  cursor: crosshair; top: 50%; transform: translateY(-50%);
  transition: background .12s, transform .12s;
}
.pln-port--in  { left:  -7px; }
.pln-port--out { right: -7px; cursor: grab; }
.pln-port:hover, .pln-port--over {
  background: rgba(52,152,219,.8); transform: translateY(-50%) scale(1.4);
}

.sbc-members { display: flex; flex-wrap: wrap; gap: .4rem; }

/* ---- results panel ---- */
.sbc-results {
  border-left: 1px solid rgba(128,128,128,.2);
  padding: .8rem;
  overflow-y: auto;
  display: flex; flex-direction: column; gap: .8rem;
}
.sbc-results h3 {
  font-size: .7rem; text-transform: uppercase; letter-spacing: .08em;
  opacity: .55; margin: 0 0 .2rem;
}
.sbc-level { font-size: 1.2rem; font-weight: 600; }
.sbc-level--nonstd { color: #e67e22; font-size: .95rem; }
.sbc-stat  { font-size: .88rem; opacity: .8; }
.sbc-issue {
  font-size: .8rem; padding: .5rem .7rem; border-radius: 6px;
  background: rgba(241,196,15,.12); border: 1px solid rgba(241,196,15,.35); color: #f1c40f;
}
.sbc-issue--hard {
  background: rgba(231,76,60,.12); border-color: rgba(231,76,60,.45); color: #e74c3c;
}
.sbc-violations { display: flex; flex-direction: column; gap: .4rem; }

/* ---- prompt mode ---- */
.sbc-mode-select {
  font-family: inherit; font-size: .78rem; padding: .25rem .4rem;
  border-radius: 5px; border: 1px solid rgba(128,128,128,.35);
  background: rgba(128,128,128,.1); color: inherit;
}
.sbc-clear-btn {
  font-family: inherit; font-size: .78rem; font-weight: 600; cursor: pointer;
  padding: .28rem .6rem; border-radius: 5px;
  border: 1px solid rgba(231,76,60,.45); background: rgba(231,76,60,.12); color: inherit;
  transition: background .12s;
}
.sbc-clear-btn:hover { background: rgba(231,76,60,.22); }
.sbc-prompt {
  padding: .6rem .7rem; border-radius: 8px;
  background: rgba(52,152,219,.1); border: 1px solid rgba(52,152,219,.35);
  display: flex; flex-direction: column; gap: .4rem;
}
.sbc-prompt-client {
  font-size: .68rem; text-transform: uppercase; letter-spacing: .06em;
  opacity: .6; font-weight: 600;
}
.sbc-prompt-text { font-size: .82rem; line-height: 1.4; }
.sbc-hint-btn {
  align-self: flex-start; font-family: inherit; font-size: .72rem; cursor: pointer;
  padding: .25rem .5rem; border-radius: 5px;
  border: 1px solid rgba(128,128,128,.35); background: rgba(128,128,128,.1); color: inherit;
}
.sbc-prompt-hint { font-size: .78rem; font-style: italic; opacity: .8; }
.sbc-reqs { display: flex; flex-direction: column; gap: .3rem; }
.sbc-req {
  font-size: .78rem; padding: .3rem .5rem; border-radius: 5px;
  border: 1px solid transparent;
}
.sbc-req--met   { background: rgba(46,204,113,.14); border-color: rgba(46,204,113,.4); color: #2ecc71; }
.sbc-req--unmet { background: rgba(128,128,128,.08); border-color: rgba(128,128,128,.25); opacity: .8; }
.sbc-win {
  padding: .6rem .7rem; border-radius: 8px; font-weight: 600; font-size: .85rem;
  background: rgba(46,204,113,.2); border: 1px solid rgba(46,204,113,.55); color: #2ecc71;
}
.sbc-challenge-list { display: flex; flex-direction: column; gap: .3rem; }
.sbc-challenge-item {
  font-family: inherit; text-align: left; cursor: pointer; font-size: .8rem;
  padding: .4rem .55rem; border-radius: 6px; color: inherit;
  border: 1px solid rgba(128,128,128,.3); background: rgba(128,128,128,.07);
  transition: background .12s, border-color .12s;
}
.sbc-challenge-item:hover { background: rgba(128,128,128,.16); }
.sbc-challenge-item--active {
  background: rgba(52,152,219,.18); border-color: rgba(52,152,219,.55); font-weight: 600;
}
.sbc-animate-btn {
  font-family: inherit; font-size: .85rem; font-weight: 600; cursor: pointer;
  padding: .45rem .8rem; border-radius: 6px;
  border: 1px solid rgba(52,152,219,.5); background: rgba(52,152,219,.15); color: inherit;
}
.sbc-animate-btn:disabled { opacity: .4; cursor: default; }

/* grid styles (reused from animator.demo.html) */
.sb-grid { gap: 3px; margin-top: .4rem; }
.sb-head { text-align: center; font-size: .72rem; opacity: .55; padding-bottom: .15rem; }
.sb-cell {
  height: 2rem; display: flex; align-items: center; justify-content: center;
  border-radius: 5px; font-weight: 600; font-size: .78rem; color: #fff;
  transition: opacity .18s ease, transform .15s ease, box-shadow .15s ease;
}
.role-data   { background: rgba(52,152,219,.85); }
.role-mirror { background: rgba(155,89,182,.78); }
.role-P      { background: rgba(46,204,113,.85); }
.role-Q      { background: rgba(241,196,15,.92); color: #222; }
.sb-cell.dim   { opacity: .1; }
.sb-cell.flash { transform: scale(1.1); box-shadow: 0 0 12px rgba(255,255,255,.45); }
.sb-cell.lit   { opacity: 1; }