/* ============================================================
   ZSCALER LAB — KAIWAI.TECH
   Extends the kaiwai-lab.css dark tool-page design language
   (see /assets/kaiwai-lab.css) into a Network Operations Center /
   Security Lab aesthetic. Self-contained: no external deps.
   ============================================================ */

:root{
  --bg:#0b0b0c;
  --bg-raise:#101012;
  --panel:#121214;
  --panel2:#17171a;
  --panel3:#1c1c20;
  --line:#28282c;
  --line-soft:#1d1d20;
  --text:#f2f2ec;
  --muted:#8f8f92;
  --muted-dim:#5f5f63;
  --accent:#d8ff3e;      /* kaiwai signature lime */
  --accent-ink:#0b0b0c;
  --zia:#6fb7ff;          /* internet / ZIA flows */
  --zpa:#c3a6ff;          /* private / ZPA flows */
  --id:#5fe0c8;           /* identity / SAML-SCIM */
  --warn:#ffbd59;
  --danger:#ff6f6a;
  --ok:#79e6a3;
  --max:1240px;
  --mono:"JetBrains Mono","Courier New",monospace;
  --sans:Inter,ui-sans-serif,system-ui,-apple-system,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;
  --radius:2px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit}
button{font:inherit;color:inherit}
::selection{background:var(--accent);color:var(--accent-ink)}

.wrap{width:min(calc(100% - 32px),var(--max));margin:auto}

/* background grid texture, subtle */
.noc-bg{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.028) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.028) 1px, transparent 1px);
  background-size:42px 42px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%, #000 40%, transparent 100%);
}

/* ---------- topbar ---------- */
.topbar{
  position:sticky;top:0;z-index:40;
  background:rgba(11,11,12,.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 0;
}
.brand-group{display:flex;align-items:center;gap:12px}
.brand{font-weight:900;letter-spacing:-.04em;text-decoration:none;font-size:16px;white-space:nowrap}
.brand-sep{color:var(--muted-dim);font-size:12px}
.brand-sub{
  font:11px var(--mono);letter-spacing:.1em;color:var(--muted);
  white-space:nowrap;
}
.back{font-size:12px;color:var(--muted);text-decoration:none;white-space:nowrap}
.back:hover{color:var(--text)}
.topbar-status{
  display:flex;align-items:center;gap:8px;
  font:10px var(--mono);letter-spacing:.08em;color:var(--muted);
  white-space:nowrap;
}
.lamp{
  width:8px;height:8px;border-radius:50%;background:var(--ok);
  box-shadow:0 0 0 3px rgba(121,230,163,.15);
  flex:none;
}
.lamp.warn{background:var(--warn);box-shadow:0 0 0 3px rgba(255,189,89,.15)}
.lamp.danger{background:var(--danger);box-shadow:0 0 0 3px rgba(255,111,106,.15);animation:lampBlink 1s steps(2,end) infinite}
@keyframes lampBlink{50%{opacity:.25}}

/* ---------- disclaimer bar ---------- */
.disclaimer-bar{
  background:#17170a;
  border-bottom:1px solid #33330f;
  color:#e8e2a8;
  font:11px/1.7 var(--mono);
  letter-spacing:.01em;
  padding:10px 0;
}
.disclaimer-bar b{color:var(--accent)}
.disclaimer-bar .wrap{display:flex;gap:10px;align-items:flex-start}

/* ---------- mission strip (company snapshot) ---------- */
.mission-strip{
  border-bottom:1px solid var(--line);
  background:var(--bg-raise);
  overflow-x:auto;
}
.mission-inner{
  display:flex;gap:0;
  width:min(calc(100% - 32px),var(--max));margin:auto;
}
.mission-chip{
  flex:none;
  padding:12px 18px;
  border-right:1px solid var(--line);
  font:10px var(--mono);
  letter-spacing:.08em;
  color:var(--muted);
  white-space:nowrap;
}
.mission-chip b{display:block;color:var(--text);font-size:13px;letter-spacing:-.01em;margin-top:4px;font-family:var(--sans);font-weight:800}
.mission-chip:last-child{border-right:0}

/* ---------- hero ---------- */
.lab-hero{padding:64px 0 40px;border-bottom:1px solid var(--line)}
.kicker{font-size:11px;letter-spacing:.18em;color:var(--accent);font-weight:800;font-family:var(--mono)}
.lab-hero h1{
  font-size:clamp(38px,6.4vw,84px);
  line-height:1.05;letter-spacing:-.02em;
  margin:16px 0 20px;max-width:1000px;font-weight:900;
}
.lab-hero h1 em{font-style:normal;color:var(--accent)}
.lab-lead{font-size:clamp(14px,1.6vw,17px);line-height:1.85;color:#c8c8c2;max-width:680px;margin:0 0 26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px}

/* ---------- generic buttons ---------- */
.btn{
  appearance:none;border:1px solid var(--accent);background:var(--accent);color:var(--accent-ink);
  padding:12px 16px;font-weight:800;letter-spacing:.03em;line-height:1.6;cursor:pointer;font-size:12px;
  font-family:var(--mono);
  transition:transform .15s ease, box-shadow .15s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;
}
.btn.secondary{background:transparent;color:var(--text);border-color:#43434a}
.btn.secondary:hover{border-color:var(--accent)}
.btn.danger{border-color:var(--danger);background:transparent;color:var(--danger)}
.btn.danger:hover{background:var(--danger);color:#1a0505}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none}
.btn-row{display:flex;flex-wrap:wrap;gap:8px}

/* ---------- stage nav ---------- */
.lab-body{
  display:grid;
  grid-template-columns:230px 1fr;
  gap:0;
  border-bottom:1px solid var(--line);
}
.stage-nav{
  border-right:1px solid var(--line);
  position:sticky;top:105px;
  align-self:start;
  max-height:calc(100vh - 120px);
  overflow-y:auto;
}
.stage-nav-list{list-style:none;margin:0;padding:0}
.stage-nav-item{border-bottom:1px solid var(--line-soft)}
.stage-nav-btn{
  display:block;width:100%;text-align:left;
  background:transparent;border:0;cursor:pointer;
  padding:14px 18px;
  color:var(--muted);
}
.stage-nav-btn .no{
  display:block;font:10px var(--mono);letter-spacing:.1em;color:var(--muted-dim);margin-bottom:5px;
}
.stage-nav-btn .label{display:block;font-size:12.5px;font-weight:700;letter-spacing:.01em;line-height:1.5}
.stage-nav-btn .label-sub{display:block;font:9px var(--mono);letter-spacing:.08em;color:var(--muted-dim);margin-top:4px}
.stage-nav-btn:hover{background:var(--panel);color:var(--text)}
.stage-nav-item.is-active .stage-nav-btn{
  background:var(--panel2);color:var(--text);
  box-shadow:inset 3px 0 0 var(--accent);
}
.stage-nav-item.is-active .no{color:var(--accent)}
.stage-nav-item.is-done .stage-nav-btn .no::after{content:" ✓";color:var(--ok)}

/* mobile stage nav: horizontal chip strip */
.stage-nav-mobile{
  display:none;
  border-bottom:1px solid var(--line);
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
}
.stage-nav-mobile-inner{display:flex;gap:0;padding:0 12px}
.stage-chip{
  flex:none;
  border:0;border-right:1px solid var(--line);
  background:transparent;color:var(--muted);
  padding:12px 14px;
  font:10px var(--mono);letter-spacing:.06em;
  cursor:pointer;white-space:nowrap;
}
.stage-chip.is-active{color:var(--accent);background:var(--panel)}

/* ---------- stage panels ---------- */
.stage-main{min-width:0;padding:0}
.stage{display:none;padding:52px 5vw 90px;max-width:1080px}
.stage.is-active{display:block;animation:stageIn .25s ease}
@keyframes stageIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.stage-head{margin-bottom:34px}
.stage-eyebrow{font:11px var(--mono);letter-spacing:.16em;color:var(--muted)}
.stage-eyebrow b{color:var(--accent)}
.stage h2{font-size:clamp(30px,4vw,54px);line-height:1.15;letter-spacing:-.01em;margin:12px 0 16px;font-weight:900}
.stage-desc{font-size:15px;line-height:1.85;color:#c8c8c2;max-width:700px;margin:0}

.section-label{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 10px;
  font:10px var(--mono);letter-spacing:.1em;color:var(--muted);
  line-height:1.6;
  margin:44px 0 16px;
}
.section-label::after{content:"";flex:1;min-width:24px;height:1px;background:var(--line)}
.section-label:first-child{margin-top:0}

/* ---------- info card (WHAT/WHY/FLOW/FAILURE) ---------- */
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin:18px 0}
.info-grid.cols-3{grid-template-columns:repeat(3,1fr)}
@media(max-width:900px){.info-grid.cols-3{grid-template-columns:1fr}}
.info-card{background:var(--panel);padding:20px}
.info-card h3{margin:0 0 12px;font-size:16px;letter-spacing:-.02em}
.kv-mini{margin:0;display:grid;gap:10px}
.kv-mini div{display:grid;grid-template-columns:78px 1fr;gap:10px;align-items:baseline}
.kv-mini b{font:10px var(--mono);color:var(--accent);letter-spacing:.08em}
.kv-mini span{font-size:13px;line-height:1.6;color:#d4d4ce}
@media(max-width:760px){.info-grid{grid-template-columns:1fr}}

/* ---------- topology ---------- */
.topo{
  border:1px solid var(--line);background:var(--panel);
  padding:36px 24px;
  position:relative;
  overflow-x:auto;
}
.topo-row{
  display:flex;align-items:center;justify-content:center;gap:0;
  min-width:min-content;
}
.topo-col{display:flex;flex-direction:column;gap:34px;align-items:center}
.noc-node{
  flex:none;
  border:1px solid var(--line);background:var(--panel2);
  padding:14px 16px;min-width:118px;text-align:center;
  position:relative;
  transition:border-color .2s ease, background .2s ease, transform .2s ease;
}
.noc-node .nn-icon{font-size:20px;line-height:1;margin-bottom:8px;display:block}
.noc-node .nn-label{display:block;font-size:11.5px;font-weight:800;letter-spacing:-.01em}
.noc-node .nn-sub{display:block;font:9px var(--mono);color:var(--muted);letter-spacing:.06em;margin-top:4px}
.noc-node.is-down{border-color:var(--danger);background:#1c1010}
.noc-node.is-down .nn-label{color:var(--danger)}
.noc-node.is-active{border-color:var(--accent)}
.noc-node.is-highlight{
  border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(216,255,62,.14);
  transform:translateY(-2px);
}
.noc-node.is-pulse{animation:nodePulse .6s ease}
@keyframes nodePulse{
  0%{box-shadow:0 0 0 0 rgba(216,255,62,.5)}
  100%{box-shadow:0 0 0 14px rgba(216,255,62,0)}
}
.noc-node button.noc-node-btn{
  all:unset;display:block;cursor:pointer;width:100%;
}
.noc-link{
  flex:none;width:56px;height:2px;background:var(--line);position:relative;
}
.noc-link::after{
  content:"";position:absolute;right:-1px;top:50%;transform:translateY(-50%);
  width:0;height:0;border-top:4px solid transparent;border-bottom:4px solid transparent;
  border-left:6px solid var(--line);
}
.noc-link.zia{background:var(--zia)}
.noc-link.zia::after{border-left-color:var(--zia)}
.noc-link.zpa{background:var(--zpa)}
.noc-link.zpa::after{border-left-color:var(--zpa)}
.noc-link.id{background:var(--id)}
.noc-link.id::after{border-left-color:var(--id)}
.noc-link.is-down{background:var(--danger);opacity:.5}
.noc-link.is-down::after{border-left-color:var(--danger)}

.topo-branch{display:flex;flex-direction:column;gap:10px;align-items:center}
.topo-branch-label{font:9px var(--mono);color:var(--muted);letter-spacing:.08em}
.flow-labeled{display:flex;flex-direction:column;align-items:center;gap:8px;flex:none;margin:0 4px}
.flow-labeled .noc-link{width:64px}

.packet{
  position:absolute;width:9px;height:9px;border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 10px 2px rgba(216,255,62,.7);
  top:0;left:0;
  pointer-events:none;
  opacity:0;
  z-index:5;
}
.packet.zpa{background:var(--zpa);box-shadow:0 0 10px 2px rgba(195,166,255,.7)}
.packet.id{background:var(--id);box-shadow:0 0 10px 2px rgba(95,224,200,.7)}
.packet.is-flying{opacity:1}

.judge-badge{
  position:absolute;
  top:-14px;left:50%;transform:translate(-50%,-100%);
  background:var(--panel3);border:1px solid var(--line);
  padding:5px 9px;font:9px var(--mono);letter-spacing:.08em;
  white-space:nowrap;opacity:0;transition:opacity .2s ease, transform .2s ease;
  pointer-events:none;
}
.judge-badge.show{opacity:1;transform:translate(-50%,-130%)}
.judge-badge.ok{color:var(--ok);border-color:#274b34}
.judge-badge.bad{color:var(--danger);border-color:#4b2727}

@media(max-width:900px){
  .topo-row{flex-direction:column}
  .noc-link{width:2px;height:36px}
  .noc-link::after{right:auto;top:auto;bottom:-1px;left:50%;transform:translateX(-50%) rotate(90deg)}
}

/* ---------- packet log / terminal ---------- */
.term{
  border:1px solid var(--line);background:#08080a;
  font:12px/1.75 var(--mono);
  padding:16px 18px;
  max-height:260px;overflow-y:auto;
  color:#b7e7c9;
}
.term .term-line{white-space:pre-wrap;word-break:break-word}
.term .term-line.err{color:var(--danger)}
.term .term-line.warn{color:var(--warn)}
.term .term-line.info{color:var(--zia)}
.term .term-line.sys{color:var(--muted)}
.term-empty{color:var(--muted-dim)}

/* ---------- cards / grid ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin:18px 0}
.card-grid.cols-2{grid-template-columns:repeat(2,1fr)}
.mini-card{
  background:var(--panel);padding:20px;cursor:default;
  text-align:left;border:0;color:inherit;
}
button.mini-card{cursor:pointer}
button.mini-card:hover{background:var(--panel2)}
.mini-card.is-selected{background:var(--panel2);box-shadow:inset 0 0 0 1px var(--accent)}
.mini-card .mc-eyebrow{display:block;font:9px var(--mono);letter-spacing:.1em;color:var(--accent);margin-bottom:8px}
.mini-card h4{margin:0 0 8px;font-size:16px;letter-spacing:-.02em}
.mini-card p{margin:0;font-size:12.5px;line-height:1.7;color:var(--muted)}
.mini-card code{font:11px var(--mono);color:#d4d4ce;background:#000;padding:2px 5px}
@media(max-width:900px){.card-grid,.card-grid.cols-2{grid-template-columns:1fr}}

/* ---------- toggle / switch ---------- */
.switch-row{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:14px 18px;border-bottom:1px solid var(--line);
}
.switch-row:last-child{border-bottom:0}
.switch-row .sr-label{font-size:13px;font-weight:700}
.switch-row .sr-sub{display:block;font:10px var(--mono);color:var(--muted);margin-top:3px;font-weight:400}
.tri-toggle{display:flex;border:1px solid var(--line)}
.tri-toggle button{
  border:0;background:transparent;color:var(--muted);
  padding:8px 12px;font:10px var(--mono);letter-spacing:.06em;cursor:pointer;
  border-right:1px solid var(--line);
}
.tri-toggle button:last-child{border-right:0}
.tri-toggle button.is-on{background:var(--ok);color:#06210f}
.tri-toggle button.is-off{background:var(--panel2)}
.tri-toggle button[data-state="allow"].is-active{background:var(--ok);color:#06210f}
.tri-toggle button[data-state="block"].is-active{background:var(--danger);color:#2a0808}
.tri-toggle button:disabled{opacity:.45;cursor:not-allowed}

.switch2{position:relative;width:46px;height:26px;border:1px solid var(--line);background:var(--panel2);cursor:pointer;flex:none}
.switch2 .knob{position:absolute;top:2px;left:2px;width:20px;height:20px;background:var(--muted);transition:.18s ease}
.switch2.is-on{border-color:var(--ok)}
.switch2.is-on .knob{left:22px;background:var(--ok)}
.switch2:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

.panel-block{border:1px solid var(--line);background:var(--panel);margin:0}
.panel-block-head{
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:12px 18px;border-bottom:1px solid var(--line);
  font:10px var(--mono);letter-spacing:.1em;color:var(--muted);
}

/* ---------- policy layout (stage 03) ---------- */
.policy-layout{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:24px;align-items:start}
@media(max-width:900px){.policy-layout{grid-template-columns:1fr}}

/* ---------- policy simulator result ---------- */
.verdict{
  display:flex;align-items:center;gap:16px;
  padding:24px;border-bottom:1px solid var(--line);
}
.verdict-badge{
  font:900 15px var(--mono);letter-spacing:.04em;
  padding:10px 16px;border:1px solid;flex:none;
}
.verdict-badge.allow{color:var(--ok);border-color:var(--ok);background:rgba(121,230,163,.08)}
.verdict-badge.block{color:var(--danger);border-color:var(--danger);background:rgba(255,111,106,.08)}
.verdict-badge.inspect{color:var(--zia);border-color:var(--zia);background:rgba(111,183,255,.08)}
.verdict-badge.bypass{color:var(--warn);border-color:var(--warn);background:rgba(255,189,89,.08)}
.verdict-reason{font-size:13px;line-height:1.7;color:#d4d4ce}
.verdict-reason b{color:var(--text)}

/* ---------- access matrix ---------- */
.matrix{width:100%;border-collapse:collapse;border:1px solid var(--line);margin:18px 0}
.matrix th,.matrix td{border:1px solid var(--line);padding:14px 16px;text-align:center;font-size:13px}
.matrix th{background:var(--panel2);font:10px var(--mono);letter-spacing:.08em;color:var(--muted);font-weight:700}
.matrix td.allow{color:var(--ok);font-weight:800}
.matrix td.block{color:var(--danger);font-weight:800}
.matrix tr td:first-child{text-align:left;font:11px var(--mono);letter-spacing:.06em;color:var(--muted)}
.matrix tr.is-active-row{background:rgba(216,255,62,.05)}
@media(max-width:700px){.matrix{font-size:11px}.matrix th,.matrix td{padding:9px 8px}}

.picker-row{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.pick-btn{
  border:1px solid var(--line);background:var(--panel2);color:var(--muted);
  padding:10px 14px;font:11px var(--mono);letter-spacing:.05em;cursor:pointer;
}
.pick-btn.is-active{border-color:var(--accent);color:var(--accent);background:rgba(216,255,62,.06)}

.result-banner{
  margin-top:18px;padding:22px 24px;border:1px solid var(--line);
  display:flex;align-items:center;gap:18px;
}
.result-banner .rb-icon{font-size:26px}
.result-banner.granted{border-color:var(--ok)}
.result-banner.denied{border-color:var(--danger)}
.result-banner h4{margin:0 0 6px;font-size:18px;letter-spacing:-.02em}
.result-banner.granted h4{color:var(--ok)}
.result-banner.denied h4{color:var(--danger)}
.result-banner p{margin:0;font-size:12.5px;color:var(--muted);line-height:1.6}

/* ---------- client connector device ---------- */
.device{
  border:1px solid var(--line);background:linear-gradient(180deg,#161618,#101012);
  padding:0;max-width:420px;
}
.device-bar{
  display:flex;align-items:center;gap:8px;padding:10px 14px;border-bottom:1px solid var(--line);
  font:10px var(--mono);color:var(--muted);letter-spacing:.06em;
}
.device-dot{width:8px;height:8px;border-radius:50%;background:#3a3a3d}
.device-body{padding:22px}
.device-app-title{font-size:15px;font-weight:800;margin-bottom:16px}
.device-row{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 0;border-top:1px solid var(--line-soft);
}
.device-row:first-of-type{border-top:0}
.device-row .dr-label{font-size:12.5px}
.device-row .dr-status{display:flex;align-items:center;gap:7px;font:10px var(--mono);color:var(--ok);letter-spacing:.06em}
.network-picker{display:flex;gap:8px;margin-top:18px}
.network-picker button{
  flex:1;border:1px solid var(--line);background:var(--panel2);color:var(--muted);
  padding:12px 8px;font:10px var(--mono);letter-spacing:.05em;cursor:pointer;text-align:center;
}
.network-picker button.is-active{border-color:var(--accent);color:var(--accent)}

.route-table{width:100%;border-collapse:collapse;margin-top:0}
.route-table th,.route-table td{border:1px solid var(--line);padding:12px 14px;font-size:12.5px;text-align:left}
.route-table th{background:var(--panel2);font:9px var(--mono);color:var(--muted);letter-spacing:.08em}
.route-tag{font:10px var(--mono);letter-spacing:.05em;padding:3px 8px;border:1px solid}
.route-tag.direct{color:var(--muted);border-color:var(--muted-dim)}
.route-tag.zia{color:var(--zia);border-color:var(--zia)}
.route-tag.zpa{color:var(--zpa);border-color:var(--zpa)}

/* ---------- migration ---------- */
.phase-track{display:flex;border:1px solid var(--line);overflow-x:auto}
.phase-step{
  flex:1;min-width:140px;padding:16px;border-right:1px solid var(--line);
  background:var(--panel);
}
.phase-step:last-child{border-right:0}
.phase-step .ps-no{font:10px var(--mono);color:var(--muted);letter-spacing:.08em}
.phase-step .ps-name{display:block;font-size:13px;font-weight:800;margin:6px 0}
.phase-step .ps-desc{font-size:11px;line-height:1.6;color:var(--muted)}
.phase-step.is-current{background:var(--panel2);box-shadow:inset 0 3px 0 var(--accent)}
.phase-step.is-done{opacity:.55}
.phase-step.is-done .ps-name::after{content:" ✓";color:var(--ok)}

.progress-meter{height:10px;background:var(--panel2);border:1px solid var(--line);margin:20px 0;overflow:hidden}
.progress-meter > i{display:block;height:100%;background:var(--accent);width:0%;transition:width .5s ease}

.migration-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.migration-stats div{background:var(--panel);padding:18px}
.migration-stats small{display:block;font:9px var(--mono);color:var(--muted);letter-spacing:.08em;margin-bottom:8px}
.migration-stats strong{font-size:30px;letter-spacing:-.03em}
@media(max-width:700px){.migration-stats{grid-template-columns:1fr 1fr}}

/* ---------- incident mode ---------- */
.incident-hero{
  border:1px solid var(--line);background:var(--panel);padding:26px;margin:18px 0;
}
.incident-symptom{display:flex;gap:16px;align-items:flex-start}
.incident-symptom .is-icon{font-size:26px}
.incident-symptom h4{margin:0 0 8px;font-size:18px}
.incident-symptom p{margin:0;font-size:13.5px;line-height:1.75;color:#d4d4ce}
.incident-idle{color:var(--muted);font-size:13px;line-height:1.8}

.check-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:18px 0}
.check-btn{
  border:1px solid var(--line);background:var(--panel2);color:var(--text);
  padding:12px 8px;font:10px var(--mono);letter-spacing:.04em;line-height:1.6;cursor:pointer;text-align:center;
}
.check-btn:hover{border-color:var(--accent)}
.check-btn:disabled{opacity:.4;cursor:not-allowed}
@media(max-width:760px){.check-grid{grid-template-columns:repeat(2,1fr)}}

.rootcause{
  margin-top:18px;border:1px solid var(--ok);background:rgba(121,230,163,.05);padding:22px;
  display:none;
}
.rootcause.show{display:block}
.rootcause .rc-eyebrow{font:10px var(--mono);color:var(--ok);letter-spacing:.1em}
.rootcause h4{margin:10px 0;font-size:18px}
.rootcause p{margin:0 0 8px;font-size:13.5px;line-height:1.75;color:#d4d4ce}
.rootcause .rc-fix{border-top:1px solid var(--line);margin-top:14px;padding-top:14px}
.rootcause .rc-fix b{color:var(--accent)}

/* ---------- before/after slider ---------- */
.ba-wrap{
  position:relative;border:1px solid var(--line);overflow:hidden;
  aspect-ratio:16/8;min-height:280px;background:var(--panel);
}
.ba-side{position:absolute;inset:0;padding:28px;display:flex;flex-direction:column;justify-content:center}
.ba-before{background:#15100f}
.ba-after{background:#0d1512;clip-path:inset(0 0 0 50%)}
.ba-eyebrow{font:10px var(--mono);letter-spacing:.12em}
.ba-eyebrow small{opacity:.6;font-size:9px;margin-left:5px;letter-spacing:.08em}
.ba-before .ba-eyebrow{color:var(--warn)}
.ba-after .ba-eyebrow{color:var(--ok)}
.ba-side h3{font-size:clamp(22px,3.4vw,40px);margin:10px 0 14px;letter-spacing:-.03em}
.ba-side ul{margin:0;padding-left:18px;color:#d4d4ce;font-size:13px;line-height:1.9}
.ba-handle{
  position:absolute;top:0;bottom:0;left:50%;width:2px;background:var(--accent);
  transform:translateX(-1px);pointer-events:none;
}
.ba-handle::after{
  content:"◂▸";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  background:var(--accent);color:var(--accent-ink);font-size:11px;font-weight:900;
  padding:8px 6px;letter-spacing:-.1em;
}
.ba-range{
  width:100%;margin-top:16px;accent-color:var(--accent);
  height:26px;cursor:ew-resize;
}

/* ---------- quiz ---------- */
.quiz-progress{display:flex;justify-content:space-between;align-items:center;font:10px var(--mono);color:var(--muted);letter-spacing:.08em;margin-bottom:14px}
.quiz-card{border:1px solid var(--line);background:var(--panel);padding:28px}
.quiz-q{font-size:19px;line-height:1.5;margin:0 0 22px;font-weight:800;letter-spacing:-.015em}
.quiz-opts{display:grid;gap:10px}
.quiz-opt{
  text-align:left;border:1px solid var(--line);background:var(--panel2);color:var(--text);
  padding:14px 16px;font-size:13.5px;cursor:pointer;line-height:1.5;
}
.quiz-opt:hover{border-color:var(--accent)}
.quiz-opt.correct{border-color:var(--ok);background:rgba(121,230,163,.08)}
.quiz-opt.incorrect{border-color:var(--danger);background:rgba(255,111,106,.08)}
.quiz-opt:disabled{cursor:default}
.quiz-explain{
  margin-top:18px;padding:16px 18px;border-top:1px solid var(--line);
  font-size:13px;line-height:1.75;color:#d4d4ce;display:none;
}
.quiz-explain.show{display:block}
.quiz-explain b{color:var(--accent)}
.quiz-score{
  text-align:center;padding:50px 20px;border:1px solid var(--line);background:var(--panel);
}
.quiz-score .qs-num{font-size:clamp(60px,10vw,110px);font-weight:900;letter-spacing:-.05em;line-height:.9;color:var(--accent)}
.quiz-score .qs-den{font-size:20px;color:var(--muted)}
.quiz-score .qs-best{margin-top:14px;font:11px var(--mono);color:var(--muted);letter-spacing:.08em}

/* ---------- footer / sources ---------- */
.sources{border-top:1px solid var(--line);padding:60px 0 30px}
.sources h3{font-size:13px;letter-spacing:.05em;margin:0 0 16px;color:var(--muted);font-family:var(--mono);font-weight:700}
.sources ul{margin:0;padding:0;list-style:none;display:grid;gap:8px}
.sources li{font-size:12.5px;color:#c8c8c2;line-height:1.6;padding-left:16px;position:relative}
.sources li::before{content:"›";position:absolute;left:0;color:var(--accent)}
.sources .checked-note{margin-top:20px;font:11px var(--mono);color:var(--muted);letter-spacing:.05em}

.lab-footer{border-top:1px solid var(--line);padding:26px 0 50px;color:var(--muted);font-size:11px}
.lab-footer .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}

.note-box{
  border:1px solid #33330f;background:#141308;color:#e8e2a8;
  padding:16px 18px;font-size:12.5px;line-height:1.8;margin:18px 0;
}
.note-box b{color:var(--accent)}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- small English sub-label next to a Japanese primary label ---------- */
.en-tag{
  font:9px var(--mono);letter-spacing:.08em;color:var(--muted-dim);
  text-transform:uppercase;margin-left:2px;
}

/* ---------- beginner guide (added above the stage list) ---------- */
.beginner-guide{padding:44px 0 8px}
.beginner-guide .card-grid{grid-template-columns:repeat(5,1fr)}
@media(max-width:1024px){.beginner-guide .card-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:700px){.beginner-guide .card-grid{grid-template-columns:repeat(2,1fr)}}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
}

/* ---------- responsive: tablet / mobile ---------- */
@media(max-width:1024px){
  .lab-body{grid-template-columns:1fr}
  .stage-nav{display:none}
  .stage-nav-mobile{display:block}
  .stage{padding:40px 5vw 70px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .check-grid{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:700px){
  .topbar-inner{flex-wrap:wrap}
  .brand-sub{display:none}
  .mission-chip{padding:10px 14px}
  .info-grid{grid-template-columns:1fr}
  .card-grid{grid-template-columns:1fr}
  .migration-stats{grid-template-columns:1fr 1fr}
  .form-fill{grid-template-columns:1fr}
  .verdict{flex-direction:column;align-items:flex-start}
  .ba-side{padding:20px}
  .phase-step{min-width:200px}
}