:root {
  --bg: #0a0f1e;
  --panel: #0d1530;
  --panel2: #111c3a;
  --border: #1e3a5f;
  --accent: #00aaff;
  --accent2: #00ffcc;
  --text: #e0eaff;
  --muted: #7a9abf;
  --green: #00e676;
  --orange: #ffab40;
  --red: #ff5252;
  --sidebar-w: 260px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', Arial, sans-serif;
  line-height: 1.55;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  background: linear-gradient(135deg, #0d1530, #0a1a3a);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.brand h1 { font-size: 1.35rem; color: var(--accent); letter-spacing: 1px; }
.brand p { font-size: 0.82rem; color: var(--muted); margin-top: 2px; }
.header-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

.lang-toggle, .mode-toggle button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 6px 14px;
  border-radius: 16px;
  cursor: pointer;
  font-size: 0.82rem;
}
.lang-toggle.active, .mode-toggle button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #000;
  font-weight: 600;
}

.app-body { display: flex; min-height: calc(100vh - 120px); }
.sidebar {
  width: var(--sidebar-w);
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 16px 0;
  flex-shrink: 0;
  overflow-y: auto;
}
.module-btn {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  border-left: 3px solid transparent;
  color: var(--muted);
  padding: 12px 20px;
  cursor: pointer;
}
.module-btn.active {
  border-left-color: var(--accent2);
  background: rgba(0,255,204,0.07);
  color: var(--accent2);
}
.module-btn .mod-title { font-size: 0.88rem; font-weight: 600; display: block; }
.module-btn .mod-desc { font-size: 0.72rem; margin-top: 3px; }

.main { flex: 1; padding: 28px 32px; overflow-y: auto; max-width: 1500px; }
.module-head { margin-bottom: 24px; }
.module-head h2 { font-size: 1.45rem; margin-bottom: 6px; }
.module-head p { color: var(--muted); font-size: 0.92rem; max-width: 720px; }

.lab-grid {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 20px;
}
@media (max-width: 900px) {
  .app-body { flex-direction: column; }
  .sidebar { width: 100%; display: flex; flex-wrap: wrap; }
  .module-btn { width: auto; padding: 8px 14px; }
  .lab-grid { grid-template-columns: 1fr; }
}

.lab-stage {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  min-height: 340px;
}
.lab-stage canvas {
  width: 100%;
  display: block;
  border-radius: 8px;
  background: #0a0f1e;
  image-rendering: auto;
}
.lab-stage .chart-label { margin-bottom: 6px; }

.lab-controls {
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
}
.control-group { margin-bottom: 18px; }
.control-group label {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 6px;
  text-transform: uppercase;
}
.control-group output { color: var(--accent2); font-weight: 600; }
input[type=range] { width: 100%; accent-color: var(--accent); }
select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 8px;
}
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }
.btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 6px 14px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.82rem;
}
.btn.active { background: var(--accent); color: #000; border-color: var(--accent); font-weight: 600; }

.info-block {
  margin-top: 20px;
  padding: 14px 16px;
  background: rgba(0,170,255,0.06);
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  font-size: 0.85rem;
  color: var(--muted);
}
.status-pill {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 600;
  margin-top: 8px;
}
.status-pill.good { background: rgba(0,230,118,0.15); color: var(--green); border: 1px solid var(--green); }
.status-pill.bad { background: rgba(255,82,82,0.12); color: var(--red); border: 1px solid var(--red); }

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
  margin-top: 12px;
}
.metric {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  text-align: center;
}
.metric .val { font-size: 1.1rem; color: var(--accent2); font-weight: 700; }
.metric .lbl { font-size: 0.68rem; color: var(--muted); margin-top: 4px; }

.coat-learning {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: -8px 0 18px;
}
.coat-learning > div {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.35;
}
.coat-learning b {
  display: grid;
  flex: 0 0 24px;
  height: 24px;
  place-items: center;
  border-radius: 50%;
  background: rgba(0,255,204,.12);
  color: var(--accent2);
}
.coat-learning strong { display: block; margin-bottom: 2px; color: var(--text); }
.coat-stage-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 7px;
}
.coat-stage-head > span:last-child { color: var(--muted); font-size: .68rem; }
.coat-charts {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(220px, 1fr);
  gap: 12px;
  margin-top: 14px;
}
.coat-charts .chart-label { margin: 0 0 6px 2px; }
.coat-types {
  display: grid;
  gap: 6px;
}
.coat-types button {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--muted);
  text-align: left;
  cursor: pointer;
}
.coat-types button.active {
  border-color: var(--accent2);
  color: var(--text);
  background: rgba(0,255,204,.08);
}
.coat-task {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 18px;
  padding: 12px;
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  background: rgba(0,170,255,.07);
  font-size: .78rem;
  color: var(--muted);
  line-height: 1.4;
}
.coat-task strong { color: var(--text); }
#coat-task-status { color: var(--accent); font-weight: 600; }
#coat-task-status.success { color: var(--green); }
.coat-note {
  margin-top: 13px;
  color: var(--muted);
  font-size: .77rem;
  line-height: 1.45;
}
@media (max-width: 900px) {
  .coat-learning { grid-template-columns: 1fr; }
  .coat-charts { grid-template-columns: 1fr; }
}

.part-list { list-style: none; margin-top: 12px; }
.part-list li {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 8px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--muted);
}
.part-list li.active { border-color: var(--accent2); color: var(--text); background: rgba(0,255,204,0.06); }

.anatomy-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
#anatomy-svg {
  min-height: 340px;
  border: 1px solid #20324c;
}
.anatomy-part {
  cursor: pointer;
  transition: opacity .2s ease, filter .2s ease, transform .35s ease;
  transform-origin: center;
}
.anatomy-part.muted { opacity: .38; }
.anatomy-part.active { filter: url(#selected-glow); }
.anatomy-rays {
  pointer-events: none;
  transition: opacity .2s ease;
}
#anatomy-svg.hide-rays .anatomy-rays { opacity: 0; }
#anatomy-svg.exploded .anatomy-housing { opacity: .14; }
#anatomy-svg.exploded .anatomy-rays { opacity: .12; }
.anatomy-legend {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin: 10px 2px 0;
  color: var(--muted);
  font-size: .72rem;
}
.anatomy-legend span { display: flex; align-items: center; gap: 6px; }
.anatomy-legend i {
  display: inline-block;
  width: 17px;
  height: 7px;
  border-radius: 4px;
}
.anatomy-legend .crown { background: #71d9ff; }
.anatomy-legend .flint { background: #c49aff; }
.anatomy-legend .mechanics { background: #536176; }
.anatomy-legend .ray { height: 2px; background: #ffd66b; }
.anatomy-detail {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 13px;
  margin-top: 14px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(0,170,255,.05);
}
.anatomy-number {
  color: var(--accent2);
  font: 700 1.5rem/1 "Segoe UI";
  border-right: 1px solid var(--border);
}
.anatomy-detail strong { font-size: .9rem; color: var(--text); }
.anatomy-detail p {
  margin: 4px 0;
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.4;
}
.anatomy-detail span { color: var(--accent); font-size: .75rem; }
.anatomy-goal {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 12px;
  border-left: 3px solid var(--accent2);
  background: rgba(0,255,204,.06);
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.4;
}
.anatomy-goal strong { color: var(--text); }
.anatomy-select { margin: 16px 0 8px; color: var(--muted); font-size: .8rem; }
.anatomy-select + .part-list { margin-top: 0; }
.anatomy-select + .part-list li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
}
.anatomy-select + .part-list li b { color: var(--accent2); font-size: .72rem; }
.anatomy-select + .part-list li span { line-height: 1.35; }

.arch-learning {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: -8px 0 14px;
}
.arch-learning > div {
  display: flex;
  gap: 9px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--panel2);
  color: var(--muted);
  font-size: .75rem;
  line-height: 1.35;
}
.arch-learning b {
  display: grid;
  flex: 0 0 22px;
  height: 22px;
  place-items: center;
  border-radius: 50%;
  color: var(--accent2);
  background: rgba(0,255,204,.1);
}
.arch-learning strong { display: block; color: var(--text); margin-bottom: 2px; }
.arch-picker {
  display: grid;
  grid-template-columns: repeat(6, minmax(100px, 1fr));
  gap: 8px;
  margin-bottom: 14px;
}
.arch-picker button {
  display: grid;
  grid-template-columns: 43px 1fr;
  grid-template-rows: auto auto;
  column-gap: 8px;
  padding: 9px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--panel2);
  color: var(--muted);
  text-align: left;
  cursor: pointer;
}
.arch-picker button.active {
  border-color: var(--accent2);
  background: rgba(0,255,204,.07);
  color: var(--text);
}
.arch-picker strong { font-size: .76rem; line-height: 1.2; }
.arch-picker small { grid-column: 2; margin-top: 2px; font-size: .64rem; line-height: 1.2; }
.arch-mini {
  grid-row: 1 / 3;
  align-self: center;
  position: relative;
  width: 43px;
  height: 22px;
  border-top: 1px solid #3c536d;
  border-bottom: 1px solid #3c536d;
}
.arch-mini::before {
  content: "";
  position: absolute;
  inset: 3px 2px;
  background: repeating-linear-gradient(90deg, transparent 0 5px, #70d9ff 5px 7px, transparent 7px 10px);
}
.arch-mini[data-mini="cooke"]::before { background: linear-gradient(90deg, transparent 8%, #70d9ff 9% 14%, transparent 15% 44%, #c49aff 45% 50%, transparent 51% 76%, #70d9ff 77% 82%, transparent 83%); }
.arch-mini[data-mini="tessar"]::before { background: repeating-linear-gradient(90deg, transparent 0 7px, #70d9ff 7px 9px, transparent 9px 11px); }
.arch-mini[data-mini="gauss"]::before { background: repeating-linear-gradient(90deg, transparent 0 4px, #ffb454 4px 6px, transparent 6px 8px); }
.arch-mini[data-mini="retro"]::before { background: repeating-linear-gradient(90deg, transparent 0 3px, #ff7a8b 3px 5px, transparent 5px 7px); }
.arch-mini[data-mini="tele"]::before { background: linear-gradient(90deg, #70d9ff 5% 10%, transparent 11% 24%, #70d9ff 25% 30%, transparent 31% 60%, #c49aff 61% 66%, transparent 67%); }
.arch-mini[data-mini="zoom"]::before { background: repeating-linear-gradient(90deg, transparent 0 2px, #e5edf8 2px 3px, transparent 3px 5px); }
.arch-stage-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 7px;
}
.arch-stage-head > div { display: flex; flex-direction: column; gap: 3px; }
.arch-stage-head strong { font-size: 1rem; color: var(--accent2); }
.arch-stage-head > span { color: var(--muted); font-size: .68rem; }
.arch-callout {
  margin-top: 10px;
  padding: 10px 12px;
  border-left: 3px solid var(--accent2);
  background: rgba(0,255,204,.05);
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.4;
}
.arch-callout b { color: var(--text); }
.arch-goal {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 12px;
  background: rgba(0,170,255,.06);
  border-left: 3px solid var(--accent);
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.4;
}
.arch-goal strong { color: var(--text); }
.arch-info {
  margin-top: 16px;
  color: var(--muted);
  font-size: .76rem;
  line-height: 1.4;
}
.arch-info strong { display: block; margin-top: 10px; color: var(--text); font-size: .73rem; text-transform: uppercase; }
.arch-info p { margin-top: 3px; }
.arch-length {
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--muted);
  font-size: .75rem;
}
.arch-length b { color: var(--accent2); }
@media (max-width: 1100px) {
  .arch-picker { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 700px) {
  .arch-learning { grid-template-columns: 1fr; }
  .arch-picker { grid-template-columns: repeat(2, 1fr); }
}

.dyn-learning,
.fu-learning {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: -8px 0 16px;
}
.dyn-learning > div,
.fu-learning > div {
  display: flex;
  gap: 9px;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--panel2);
  color: var(--muted);
  font-size: .75rem;
  line-height: 1.35;
}
.dyn-learning b,
.fu-learning b {
  display: grid;
  flex: 0 0 23px;
  height: 23px;
  place-items: center;
  border-radius: 50%;
  background: rgba(0,255,204,.1);
  color: var(--accent2);
}
.dyn-learning strong,
.fu-learning strong { display: block; color: var(--text); margin-bottom: 2px; }
.dyn-gap { margin-top: 13px; }
.dyn-goal,
.fu-goal {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 17px;
  padding: 12px;
  border-left: 3px solid var(--accent2);
  background: rgba(0,255,204,.06);
  color: var(--muted);
  font-size: .78rem;
  line-height: 1.4;
}
.dyn-goal strong,
.fu-goal strong { color: var(--text); }
.dyn-conclusion,
.fu-conclusion {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-top: 15px;
  padding: 12px;
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  background: rgba(0,170,255,.07);
  color: var(--muted);
  font-size: .77rem;
  line-height: 1.4;
}
.dyn-conclusion strong,
.fu-conclusion strong { color: var(--text); }
.dyn-conclusion small,
.fu-conclusion small { color: var(--accent2); }
.fu-diagnostic-grid {
  display: grid;
  grid-template-columns: minmax(150px, 1fr) minmax(150px, 1fr) minmax(300px, 2fr);
  gap: 11px;
  margin-top: 13px;
}
.fu-diagnostic-grid .chart-label { margin: 0 0 6px 2px; }
@media (max-width: 900px) {
  .dyn-learning,
  .fu-learning { grid-template-columns: 1fr; }
  .fu-diagnostic-grid { grid-template-columns: 1fr; }
}

.split-charts { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.chart-label { font-size: 0.72rem; color: var(--muted); text-transform: uppercase; margin-bottom: 6px; }

/* UNIFIED OPTICAL BENCH */
.bench-presets {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: -8px 0 16px;
  color: var(--muted);
  font-size: 0.78rem;
}
.bench-layout {
  display: grid;
  grid-template-columns: minmax(620px, 1fr) 340px;
  gap: 18px;
  align-items: start;
}
.bench-workspace { min-width: 0; }
.bench-workspace canvas { border: 1px solid rgba(30,58,95,0.55); }
.bench-workspace #bench-layout { cursor: grab; touch-action: none; }
.bench-gap { margin-top: 16px; }
.bench-diagnostics {
  display: grid;
  grid-template-columns: 1fr 1fr minmax(180px, 0.9fr);
  gap: 12px;
  margin-top: 16px;
}
.bench-model-note {
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.78rem;
  background: rgba(0,170,255,0.04);
}
.bench-model-note strong {
  display: block;
  color: var(--accent2);
  margin-bottom: 8px;
}
.bench-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding-bottom: 14px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.bench-tabs .btn { padding: 7px 5px; }
.bench-controls .part-list {
  max-height: 154px;
  overflow-y: auto;
  margin-bottom: 14px;
}
.bench-controls .part-list li { padding: 7px 9px; font-size: 0.76rem; }
.bench-controls .control-group { margin-bottom: 12px; }
.bench-metrics { grid-template-columns: repeat(2, 1fr); }
.bench-metrics .metric { padding: 8px 5px; }
.bench-metrics .val { font-size: 0.95rem; }
.bench-focus-assistant {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-top: 15px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: rgba(0,255,204,.045);
}
.bench-focus-head {
  display: flex;
  justify-content: space-between;
  color: var(--text);
  font-size: .78rem;
}
.bench-focus-head span { color: var(--accent2); font-weight: 700; }
.bench-focus-track {
  height: 7px;
  overflow: hidden;
  border-radius: 5px;
  background: var(--bg);
}
.bench-focus-track i {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #ff5252, #ffb454 45%, #00e676);
  transition: width .18s ease;
}
.bench-focus-assistant .btn-row { display: grid; grid-template-columns: 1fr 1.2fr 1fr; }
.bench-focus-assistant .btn { padding: 6px 4px; font-size: .7rem; }
#bench-focus-guide { min-height: 2.7em; color: var(--accent); font-size: .72rem; line-height: 1.35; }
#bench-focus-guide.good { color: var(--green); }

@media (max-width: 1180px) {
  .bench-layout { grid-template-columns: 1fr; }
  .bench-controls { display: block; }
}
@media (max-width: 700px) {
  .main { padding: 18px 12px; }
  .bench-diagnostics { grid-template-columns: 1fr; }
  .bench-presets .btn { padding: 5px 9px; }
}

footer.app-footer {
  text-align: center;
  padding: 20px;
  color: var(--muted);
  font-size: 0.78rem;
  border-top: 1px solid var(--border);
}