:root {
  --bg: #edf2f7;
  --ink: #0f172a;
  --muted: #475569;
  --panel: #ffffff;
  --panel-soft: #f8fbff;
  --border: #d7e0ea;
  --pcpi: #2563eb;
  --memory: #0f766e;
  --accel: #dc2626;
  --active: #f59e0b;
  --ok: #16a34a;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: linear-gradient(180deg, #dfe7f2 0%, var(--bg) 24%, #f6f9fd 100%);
  color: var(--ink);
}

code {
  font-family: Consolas, "Courier New", monospace;
}

.topbar {
  padding: 18px 22px 12px;
  border-bottom: 1px solid #cbd5e1;
  background: rgba(248, 250, 252, 0.94);
}

.topbar-main {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.topbar h1 {
  margin: 0;
  font-size: 25px;
}

.topbar p {
  margin: 6px 0 0;
  color: var(--muted);
}

.workspace {
  --left-col: 66%;
  --right-col: calc(34% - 12px);
  --top-row: 58%;
  --bottom-row: calc(42% - 12px);
  display: grid;
  grid-template-columns: minmax(680px, var(--left-col)) 12px minmax(420px, var(--right-col));
  grid-template-rows: minmax(420px, var(--top-row)) 12px minmax(320px, var(--bottom-row));
  gap: 14px;
  padding: 14px;
  align-items: stretch;
  min-height: calc(100vh - 94px);
}

.architecture-panel { grid-column: 1; grid-row: 1; }
.systolic-panel { grid-column: 3; grid-row: 1; }
.control-panel { grid-column: 1; grid-row: 3; }
.log-panel { grid-column: 3; grid-row: 3; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 16px;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
  overflow: auto;
  min-height: 0;
}

.panel-head {
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.panel-head h2 {
  margin: 0;
  font-size: 18px;
}

.panel-subtitle {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.box-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.block-info-btn {
  width: 24px;
  height: 24px;
  padding: 0;
  border-radius: 999px;
  font-size: 12px;
  line-height: 22px;
  text-align: center;
  background: #334155;
  border-color: #334155;
}

.splitter {
  border-radius: 999px;
  position: relative;
  background: linear-gradient(180deg, #d7dee9 0%, #94a3b8 50%, #d7dee9 100%);
}

.splitter::before {
  content: "";
  position: absolute;
  border-radius: 999px;
  border: 1px dashed rgba(255, 255, 255, 0.68);
}

.splitter-vertical {
  grid-column: 2;
  grid-row: 1 / span 3;
  cursor: col-resize;
}

.splitter-vertical::before {
  inset: 16px 2px;
}

.splitter-horizontal {
  grid-column: 1 / span 3;
  grid-row: 2;
  cursor: row-resize;
  background: linear-gradient(90deg, #d7dee9 0%, #94a3b8 50%, #d7dee9 100%);
}

.splitter-horizontal::before {
  inset: 2px 16px;
}

button {
  border: 1px solid #0f172a;
  background: #0f172a;
  color: #fff;
  border-radius: 10px;
  padding: 8px 14px;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: #1e293b;
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.panel-controls {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.mini-btn {
  padding: 6px 10px;
  font-size: 12px;
  border-radius: 8px;
}

.mini-btn-info {
  background: #334155;
  border-color: #334155;
}

.hint,
.systolic-note {
  margin: 10px 0 12px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.diagram-wrap {
  min-height: 100%;
  border: 1px solid #dbe4ef;
  border-radius: 16px;
  background: linear-gradient(180deg, #fbfdff 0%, #f4f8fd 100%);
  overflow: auto;
}

.diagram-canvas {
  position: relative;
  min-width: 1260px;
  min-height: 860px;
  padding: 18px;
}

.global-note {
  position: absolute;
  z-index: 3;
  padding: 6px 9px;
  border-radius: 12px;
  border: 1px solid #d9e2ee;
  background: rgba(255, 255, 255, 0.96);
  color: #334155;
  font-size: 11px;
  line-height: 1.35;
}

.global-note {
  left: 24px;
  top: 20px;
  font-weight: 600;
}

.domain-chip {
  position: absolute;
  top: 72px;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  z-index: 2;
}

.cpu-domain { left: 34px; background: #dbeafe; color: #1d4ed8; }
.wrapper-domain { left: 330px; background: #e2e8f0; color: #334155; }
.accel-domain { left: 850px; background: #ffedd5; color: #c2410c; }
.memory-domain { left: 430px; top: 500px; background: #ccfbf1; color: #0f766e; }

.arch-svg {
  position: absolute;
  inset: 0;
  width: 1260px;
  height: 820px;
  z-index: 1;
}

.sig {
  fill: none;
  stroke-width: 3.25;
  stroke-linecap: round;
  transition: stroke-width 0.15s ease, filter 0.15s ease;
}

.sig-pcpi { stroke: #7db2ff; }
.sig-accel { stroke: #f6a26d; }
.sig-memory { stroke: #8de2d7; }
.sig-clock { stroke: #94a3b8; stroke-width: 3; stroke-dasharray: 10 8; }
.sig.active { stroke-width: 4.5; filter: drop-shadow(0 0 4px rgba(245, 158, 11, 0.42)); }

.arch-box {
  position: absolute;
  border: 2px solid #334155;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.98);
  padding: 16px;
  z-index: 2;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.arch-box.active,
.subblock.active,
.sig-label.active {
  box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.16);
}

.cpu-box {
  left: 34px;
  top: 160px;
  width: 210px;
  min-height: 150px;
  border-color: var(--pcpi);
  background: linear-gradient(180deg, #ffffff 0%, #eff6ff 100%);
}

.wrapper-box {
  left: 320px;
  top: 130px;
  width: 440px;
  min-height: 360px;
  border-color: #475569;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.accel-box {
  left: 840px;
  top: 150px;
  width: 360px;
  min-height: 300px;
  border-color: var(--accel);
  background: linear-gradient(180deg, #ffffff 0%, #fff7ed 100%);
}

.memory-box {
  left: 380px;
  top: 555px;
  width: 320px;
  min-height: 120px;
  border-color: var(--memory);
  background: linear-gradient(180deg, #ffffff 0%, #ecfeff 100%);
}

.arrow-info {
  position: absolute;
  z-index: 4;
  width: 22px;
  height: 22px;
  padding: 0;
  border-radius: 999px;
  border: 1px solid #cbd5e1;
  background: rgba(255, 255, 255, 0.98);
  color: #334155;
  font-size: 11px;
  font-weight: 800;
  line-height: 20px;
  text-align: center;
}

.arrow-info:hover {
  background: #e2e8f0;
}

.arrow-info.active {
  border-color: #f59e0b;
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.16);
}

.info-pcpi-req { left: 282px; top: 238px; }
.info-pcpi-resp { left: 304px; top: 406px; }
.info-accel-start { left: 808px; top: 238px; }
.info-accel-payload { left: 808px; top: 308px; }
.info-accel-status { left: 808px; top: 388px; }
.info-mem-req { left: 540px; top: 566px; }
.info-mem-resp { left: 630px; top: 626px; }

.signal-popover {
  position: absolute;
  z-index: 5;
  width: 260px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid #d9e2ee;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.12);
}

.signal-popover-title {
  font-size: 12px;
  font-weight: 800;
  color: #334155;
  margin-bottom: 6px;
}

.signal-popover-body {
  font-size: 11px;
  line-height: 1.45;
  color: #334155;
}

.box-title,
.sub-title {
  font-weight: 800;
  font-size: 14px;
}

.box-body,
.sub-body {
  margin-top: 8px;
  color: #334155;
  font-size: 13px;
  line-height: 1.45;
}

.memory-list {
  margin-top: 10px;
  display: grid;
  gap: 6px;
  font-size: 13px;
}

.subgrid {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.wrapper-grid,
.accel-grid {
  grid-template-columns: 1fr 1fr;
}

.wide-subblock {
  grid-column: 1 / -1;
}

.subblock {
  border: 1px solid #d6e0ea;
  border-radius: 14px;
  padding: 12px;
  background: rgba(248, 250, 252, 0.88);
}

.accel-subblock {
  background: rgba(255, 255, 255, 0.88);
}

.legend {
  position: absolute;
  left: 28px;
  bottom: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px dashed #d4deeb;
  right: 28px;
  z-index: 2;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
}

.swatch {
  width: 18px;
  height: 8px;
  border-radius: 999px;
  display: inline-block;
}

.swatch-pcpi { background: var(--pcpi); }
.swatch-memory { background: var(--memory); }
.swatch-accel { background: var(--accel); }
.swatch-active { background: var(--active); }

.mesh {
  display: grid;
  grid-template-columns: repeat(4, 144px);
  gap: 16px;
  width: max-content;
  margin: 10px auto 0;
}

.cell {
  width: 144px;
  height: 144px;
  border: 1px solid #cbd5e1;
  border-radius: 16px;
  background: #f8fafc;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.14s ease;
}

.cell.active {
  background: #ffe7c2;
  border-color: #ea580c;
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
}

.cell.done {
  background: #dcfce7;
  border-color: var(--ok);
}

.cell-tag {
  position: absolute;
  top: 8px;
  left: 10px;
  font-size: 12px;
  font-weight: 800;
  color: #64748b;
}

.cell-center {
  text-align: center;
  font-size: 12px;
  font-weight: 800;
  color: #1e293b;
  line-height: 1.25;
  max-width: 86px;
}

.port {
  position: absolute;
  padding: 3px 5px;
  border-radius: 999px;
  font-size: 9px;
  font-weight: 800;
  line-height: 1.1;
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.12s ease, transform 0.12s ease;
}

.port.show {
  opacity: 1;
  transform: scale(1);
}

.port-x-in { left: 6px; top: 50%; transform: translateY(-50%) scale(0.92); background: #dbeafe; color: #1d4ed8; }
.port-x-in.show { transform: translateY(-50%) scale(1); }
.port-y-in { top: 8px; left: 50%; transform: translateX(-50%) scale(0.92); background: #fee2e2; color: #b91c1c; }
.port-y-in.show { transform: translateX(-50%) scale(1); }
.port-x-out { right: 6px; top: 50%; transform: translateY(-50%) scale(0.92); background: #bfdbfe; color: #1d4ed8; }
.port-x-out.show { transform: translateY(-50%) scale(1); }
.port-y-out { bottom: 8px; left: 50%; transform: translateX(-50%) scale(0.92); background: #fecaca; color: #b91c1c; }
.port-y-out.show { transform: translateX(-50%) scale(1); }

.flow-arrow {
  display: none;
}

.modal[hidden] {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
}

.modal-card {
  position: relative;
  width: min(860px, calc(100vw - 40px));
  max-height: calc(100vh - 40px);
  overflow: auto;
  margin: 20px auto;
  background: #ffffff;
  border: 1px solid #d7e0ea;
  border-radius: 18px;
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.22);
  padding: 18px;
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.modal-head h2 {
  margin: 0;
}

.modal-body {
  display: grid;
  gap: 12px;
}

.modal-section {
  border: 1px solid #dbe2ef;
  border-radius: 12px;
  padding: 12px;
  background: #f8fbff;
}

.modal-section h3 {
  margin: 0 0 8px;
  font-size: 15px;
}

.modal-section p {
  margin: 0;
  line-height: 1.6;
  color: #334155;
}

.modal-list {
  margin: 0;
  padding-left: 18px;
  color: #334155;
  line-height: 1.6;
}

.modal-note {
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
}

.pipeline-diagram {
  display: grid;
  grid-template-columns: repeat(9, auto);
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}

.pipeline-stage {
  min-width: 100px;
  padding: 10px 12px;
  border: 1px solid #dbe2ef;
  border-radius: 12px;
  background: #ffffff;
  text-align: center;
  font-weight: 800;
}

.pipeline-stage span {
  display: block;
  margin-top: 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
}

.pipeline-arrow {
  font-weight: 800;
  color: #64748b;
}

.detail-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(2, minmax(180px, 1fr));
  gap: 8px;
  font-size: 13px;
}

.detail-grid div {
  border: 1px solid #dbe2ef;
  border-radius: 10px;
  padding: 8px 10px;
  background: var(--panel-soft);
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.detail-grid span {
  font-family: Consolas, "Courier New", monospace;
  font-weight: 700;
  text-align: right;
}

.state-card {
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid #dbe2ef;
  border-radius: 14px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
}

.state-card h3 {
  margin: 0 0 8px;
}

.state-title {
  display: inline-block;
  padding: 5px 10px;
  border-radius: 999px;
  background: #dbeafe;
  color: #1d4ed8;
  font-family: Consolas, "Courier New", monospace;
  font-weight: 800;
}

.state-desc {
  margin: 10px 0 0;
  color: #334155;
  font-size: 13px;
  line-height: 1.55;
}

.fsm {
  margin: 8px 0 0;
  padding-left: 20px;
  display: grid;
  gap: 6px;
}

.fsm li {
  border: 1px solid #dbe2ef;
  border-radius: 10px;
  padding: 7px 10px;
  background: #f8fafc;
}

.fsm li.active {
  border-color: #2563eb;
  background: #dbeafe;
  color: #1d4ed8;
  font-weight: 800;
}

#logBox {
  margin: 0;
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 14px;
  min-height: 220px;
  height: calc(100% - 8px);
  overflow: auto;
  padding: 12px;
  font-family: Consolas, "Courier New", monospace;
  font-size: 12px;
}

.footer {
  padding: 8px 14px 16px;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 1320px) {
  .workspace {
    display: block;
  }

  .splitter {
    display: none;
  }

  .panel {
    margin-bottom: 14px;
  }
}