:root{
  --line:rgba(255,255,255,.13); --line2:rgba(255,255,255,.24);
  --text:#eef1f7; --muted:#8a94a8; --green:#76B900; --cyan:#22d3ee;
  --red:#ff5d73; --amber:#ffb020; --violet:#8b7bff; --r:2px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{background:#000;color:var(--text);font:14px/1.6 'Inter',system-ui,sans-serif;overflow:hidden;text-shadow:0 1px 14px rgba(0,0,0,.9);-webkit-text-size-adjust:100%}
::selection{background:rgba(118,185,0,.35)}
.tag,.btag,.step-label,.hint,.recent-label,.nav-sep,.legend,.map-label,.pill,.meta,.skip,.mode-hint{font-family:'JetBrains Mono',ui-monospace,monospace}
.muted{color:var(--muted)}
.tiny{font-size:.74rem;padding:6px 10px}

@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes bootIn{from{opacity:0;transform:translateX(-10px)}to{opacity:1;transform:none}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes pop{from{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}
@keyframes flow{to{stroke-dashoffset:-22}}
@keyframes edgeIn{from{opacity:0}to{opacity:.85}}
@keyframes nodepulse{0%,100%{stroke-width:1.5}50%{stroke-width:3.5}}
@keyframes blink{50%{opacity:0}}
@keyframes bounce{0%,80%,100%{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}
@keyframes shimmer{to{background-position:200% 50%}}

/* ---------- Space ---------- */
#bh{position:fixed;inset:0;width:100%;height:100%;z-index:0;display:none;background:#000}
body.bh-on #bh{display:block}
.shade{position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(120% 90% at 50% 25%,transparent 45%,rgba(0,0,0,.55) 100%),
    linear-gradient(to top,rgba(0,0,0,.8) 0%,rgba(0,0,0,.28) 38%,transparent 64%)}
#fx{position:fixed;inset:0;z-index:60;pointer-events:none}

/* ---------- Intro ---------- */
#intro{position:fixed;inset:0;z-index:30;display:none;flex-direction:column;align-items:center;justify-content:flex-end;
  padding-bottom:13vh;cursor:pointer;transition:opacity .7s ease}
body.intro-active #intro{display:flex}
body.intro-out #intro{opacity:0}
.boot{position:absolute;left:34px;top:30px;font:400 .72rem/1.95 'JetBrains Mono',monospace;color:var(--green);
  letter-spacing:.08em;text-shadow:0 0 10px rgba(118,185,0,.5);white-space:pre}
.it{display:flex;justify-content:center;min-height:1.2em;font:900 clamp(2.4rem,6.5vw,5rem) 'Orbitron',sans-serif;color:#fff;
  text-shadow:0 0 30px rgba(255,255,255,.3)}
.ch{display:inline-block;width:.95em;text-align:center}
.ch.sp{width:.5em}
.ch.noise{color:var(--green);text-shadow:0 0 14px rgba(118,185,0,.85)}
.is{margin-top:16px;min-height:1.5em;font:400 clamp(.7rem,1.2vw,.95rem) 'JetBrains Mono',monospace;letter-spacing:.34em;
  padding-left:.34em;text-transform:uppercase;color:#aab4c8;text-align:center}
.skip{position:absolute;bottom:22px;font-size:.6rem;letter-spacing:.2em;color:#4f5a72}

/* ---------- Layout ---------- */
.app{position:relative;z-index:1;display:flex;height:100vh;height:100dvh;transition:opacity 1.2s ease}
body.intro-active .app{opacity:0;pointer-events:none}
body.booted .brand,body.booted .newbtn,body.booted .nav button{animation:bootIn .7s ease both;animation-delay:calc(var(--i,0) * 90ms)}
body.booted .topbar{animation:fadeUp .8s ease .3s both}

.sidebar{width:248px;flex-shrink:0;padding:18px 14px;display:flex;flex-direction:column;gap:12px;
  background:linear-gradient(90deg,rgba(0,0,0,.6),rgba(0,0,0,.2));border-right:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;padding:0 4px 4px}
.brand-name{font:700 1rem 'Orbitron',sans-serif;letter-spacing:.3em}
.newbtn{border:1px solid var(--line2);background:transparent;color:#fff;padding:9px 12px;font:500 .84rem 'Inter',sans-serif;
  text-align:left;cursor:pointer;border-radius:var(--r);transition:all .2s}
.newbtn:hover{background:rgba(255,255,255,.08)}
.nav{display:flex;flex-direction:column;gap:2px}
.nav button{display:flex;align-items:center;gap:10px;padding:8px 10px;border:none;background:none;color:#9aa5bb;
  font:500 .86rem 'Inter',sans-serif;cursor:pointer;text-align:left;border-radius:var(--r);transition:all .2s}
.nav button:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav button.active{color:#fff;background:rgba(255,255,255,.07);box-shadow:inset 2px 0 0 var(--green)}
.nav button.primary-nav{font-size:.92rem;color:#fff}
.nav button.primary-nav em{margin-left:auto;font:500 .52rem 'JetBrains Mono',monospace;letter-spacing:.12em;font-style:normal;
  color:#000;background:var(--green);padding:2px 6px;border-radius:1px}
.nav-sep{font-size:.58rem;letter-spacing:.16em;text-transform:uppercase;color:#5d6880;margin:10px 10px 2px}
.recent-label{font-size:.58rem;letter-spacing:.16em;text-transform:uppercase;color:#5d6880;margin:8px 10px 0}
.recent{flex:1;min-height:0;overflow-y:auto;display:flex;flex-direction:column;gap:1px}
.rec{display:flex;align-items:center;gap:8px;padding:7px 10px;border:none;background:none;color:#aab4c8;
  font:400 .82rem 'Inter',sans-serif;text-align:left;cursor:pointer;border-radius:var(--r);white-space:nowrap}
.rec span{overflow:hidden;text-overflow:ellipsis}
.rec:hover{background:rgba(255,255,255,.06);color:#fff}
.rec.active{background:rgba(255,255,255,.08);color:#fff}
.dot{width:6px;height:6px;border-radius:50%;flex-shrink:0;background:var(--cyan)}
.dot.fixed,.dot.no_gap{background:var(--green)}
.dot.partial{background:var(--amber)}
.dot.unresolved{background:var(--red)}
.side-foot{padding-top:6px}
.fx-btn{display:block;width:100%;margin-top:5px;padding:6px 8px;border:1px solid var(--line);background:transparent;color:#707c94;
  font:500 .64rem 'JetBrains Mono',monospace;cursor:pointer;border-radius:var(--r);text-align:left}
.fx-btn:hover{color:#fff;border-color:var(--line2)}

/* The main area never scrolls by itself: every page fits the screen and scrolls inside its own boxes. */
.main{flex:1;min-width:0;display:flex;flex-direction:column;padding:18px 32px 24px;overflow:hidden;overflow:clip}
.topbar{width:100%;max-width:1320px;margin:0 auto 14px;display:flex;justify-content:space-between;align-items:flex-end;gap:14px;flex-wrap:wrap;flex-shrink:0}
.ptitle{font:700 .95rem 'Orbitron',sans-serif;letter-spacing:.24em;text-transform:uppercase}
.page-sub{color:var(--muted);font-size:.78rem;margin-top:2px}
.chips-row{display:flex;gap:14px;flex-wrap:wrap}
.pill{font-size:.66rem;color:var(--muted);letter-spacing:.04em}
.pill.hot{color:var(--green)}
.page{display:none;width:100%;max-width:1320px;margin:0 auto;flex:1 1 0%;min-height:0;overflow-y:auto;animation:fadeUp .35s ease}
.page.active{display:flex;flex-direction:column}
.grid2{display:grid;grid-template-columns:1fr 1.1fr;gap:34px;align-items:start}
.sec{padding:0 0 22px;margin-bottom:22px;border-bottom:1px solid var(--line)}
.sec-title{font:600 .95rem 'Inter',sans-serif;margin-bottom:10px}

/* ---------- Controls ---------- */
.input{width:100%;padding:10px 12px;border:1px solid var(--line2);background:rgba(0,0,0,.4);color:var(--text);font:inherit;
  outline:none;transition:border .2s,box-shadow .2s;resize:vertical;border-radius:0;text-shadow:none}
.input:focus{border-color:#fff;box-shadow:0 0 0 1px rgba(255,255,255,.25)}
select.input option{background:#0b0e16}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:8px 14px;border:1px solid var(--line2);
  background:transparent;color:#fff;font:500 .84rem 'Inter',sans-serif;cursor:pointer;transition:all .2s;text-decoration:none;border-radius:var(--r)}
.btn:hover:not(:disabled){background:rgba(255,255,255,.1)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.primary{background:#fff;color:#000;border-color:#fff;font-weight:600;text-shadow:none}
.btn.primary:hover:not(:disabled){background:#dcdcdc}
.btn.ghost{border-color:transparent;color:#aab4c8}
.btn.danger{border-color:rgba(255,93,115,.55);color:#ff9aa8}
.btn.small{padding:5px 11px;font-size:.76rem}
button:focus-visible,.btn:focus-visible,.chip:focus-visible,.rec:focus-visible,a:focus-visible{outline:2px solid var(--green);outline-offset:2px}
.row{display:flex;gap:8px;margin-top:10px;align-items:center;flex-wrap:wrap}
.row.between{justify-content:space-between}
.row .input{flex:1;min-width:140px}
.spin{width:12px;height:12px;border:2px solid rgba(0,0,0,.3);border-top-color:#000;border-radius:50%;animation:spin .7s linear infinite;display:inline-block}
.chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}
.chips.pad{padding:0 22px 8px}
.chip{padding:5px 12px;border:1px solid var(--line);background:transparent;color:#b6c0d4;font:400 .78rem 'Inter',sans-serif;cursor:pointer;transition:all .2s;border-radius:var(--r)}
.chip:hover{border-color:#fff;color:#fff}
.tag{font-size:.6rem;padding:2px 7px;color:var(--cyan);border:1px solid rgba(34,211,238,.35);letter-spacing:.04em}
.hint{font-size:.64rem;color:#5d6880}
.progress{height:3px;background:rgba(255,255,255,.1);overflow:hidden;flex:1;min-width:80px}
.progress>div{height:100%;background:linear-gradient(90deg,var(--green),var(--cyan));transition:width .5s}
.check{display:flex;gap:10px;align-items:flex-start;margin-top:16px;color:#cfd6e6;font-size:.86rem}
code{font-family:'JetBrains Mono',monospace;background:rgba(255,255,255,.08);padding:1px 6px;font-size:.88em}
.katex{font-size:1.05em}

/* ---------- Root-Cause (Grok-style) ---------- */
.rc{flex:1 1 0%;min-height:0;display:grid;grid-template-columns:minmax(0,1fr) 0fr;transition:grid-template-columns .9s cubic-bezier(.2,.8,.2,1)}
.rc.has-map{grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);column-gap:30px}
.rc-chat{display:flex;flex-direction:column;min-height:0;height:100%;position:relative;border:1px solid var(--line);
  background:rgba(0,0,0,.3);backdrop-filter:blur(3px);border-radius:0;width:100%}
.rc:not(.has-map) .rc-chat{max-width:780px;margin:0 auto}
.rc-chat.loading::before{content:"";position:absolute;top:0;left:0;right:0;height:2px;z-index:6;
  background:linear-gradient(90deg,transparent,var(--green),var(--cyan),transparent);background-size:50% 100%;animation:shimmer 1s linear infinite}
.steps{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:10px 18px;border-bottom:1px solid var(--line)}
.step-label{font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.sp{display:inline-flex;align-items:center;gap:6px;padding:2px 9px 2px 3px;font-size:.72rem;border:1px solid var(--line);color:#8d9bb8}
.sp b{width:17px;height:17px;display:inline-flex;align-items:center;justify-content:center;font-size:.62rem;background:rgba(255,255,255,.1)}
.sp.done{color:#cfe9a0;border-color:rgba(118,185,0,.55)}.sp.done b{background:var(--green);color:#000}
.sp.current{color:#fff;border-color:rgba(34,211,238,.65)}.sp.current b{background:var(--cyan);color:#000}
.sp.skipped{color:#ffd28a;border-color:rgba(255,176,32,.55)}.sp.skipped b{background:var(--amber);color:#000}
.thread{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:20px 22px;display:flex;flex-direction:column;gap:18px}
.m{display:flex;animation:fadeUp .3s ease;max-width:100%}
.m.user{align-self:flex-end;max-width:82%}
.b{flex:1;min-width:0;font-size:.92rem}
.m.user .b{flex:none;padding:8px 13px;border:1px solid var(--line2);background:rgba(255,255,255,.07);white-space:pre-wrap}
.b p{margin:3px 0}.b ul,.b ol{margin:5px 0 5px 20px}
.b.q,.b.ok,.b.bad,.b.report,.b.plan,.b.lesson,.b.result{padding-left:14px;border-left:2px solid var(--cyan)}
.b.ok{border-left-color:var(--green)}.b.bad{border-left-color:var(--red)}.b.plan{border-left-color:var(--violet)}
.b.lesson{border-left-color:var(--green)}.b.report{border-left-color:var(--cyan)}
.b.result.ok{border-left-color:var(--green)}.b.result.warn{border-left-color:var(--amber)}.b.result.bad{border-left-color:var(--red)}
.b.note{color:var(--muted);font-size:.82rem}
.btag{font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;color:var(--cyan);margin-bottom:4px}
.b.ok .btag,.b.lesson .btag{color:#b6e36a}.b.bad .btag{color:#ff9aa8}.b.plan .btag{color:#c0b6ff}
.b h4,.bubble h4{font:600 .95rem 'Inter',sans-serif;color:#fff;margin:12px 0 4px}
.dots{display:inline-flex;gap:4px;margin-right:8px;vertical-align:middle}
.dots i{width:5px;height:5px;border-radius:50%;background:var(--green);animation:bounce 1.2s infinite ease-in-out}
.dots i:nth-child(2){animation-delay:.15s}.dots i:nth-child(3){animation-delay:.3s}
.composer-rc{padding:12px 18px 14px;border-top:1px solid var(--line)}
.composer-rc:empty{display:none}
.composer-rc .row{margin-top:8px}
.banner{padding:8px 12px;border:1px solid rgba(139,123,255,.45);font-size:.84rem}

.start{margin:auto;max-width:560px;width:100%;padding:10px 0;text-align:center}
.hero-h{font:500 clamp(1.1rem,2.2vw,1.55rem) 'JetBrains Mono',monospace;letter-spacing:.14em;text-transform:uppercase;min-height:1.6em}
.hero-p{color:var(--muted);font-size:.86rem;margin:6px 0 18px}
.start .input.big{padding:14px 16px;font-size:1rem;text-align:left}
.start .row{margin-top:10px}
.start .row select{flex:1}
.start .chips{justify-content:center}

/* ---------- Daily review (home page, same panel as the question form) ---------- */
.review-panel{margin:26px auto 0;max-width:560px;padding:16px 18px;border:1px solid var(--line);background:rgba(0,0,0,.35);text-align:center}
.rp-title{font:500 .64rem 'JetBrains Mono',monospace;letter-spacing:.18em;text-transform:uppercase;color:var(--muted)}
.rp-text{font-size:.86rem;color:#cfd6e6;margin:8px auto 0;max-width:460px}
.review-panel .row{justify-content:center;margin-top:14px}

/* ---------- Chat / map switch (phones only) ---------- */
.rc-switch{display:none;flex-shrink:0;margin:0 0 8px;border:1px solid var(--line2)}
.rc-switch button{flex:1;padding:10px;border:none;background:transparent;color:#9aa5bb;font:500 .82rem 'Inter',sans-serif;cursor:pointer}
.rc-switch button.on{background:#fff;color:#000;font-weight:600;text-shadow:none}

/* ---------- Knowledge map ---------- */
.rc-map{min-width:0;overflow:hidden;display:flex;flex-direction:column;opacity:0;transform:translateX(40px);
  transition:opacity .8s ease .25s,transform .8s ease .25s}
.rc.has-map .rc-map{opacity:1;transform:none}
.map-label{font-size:.62rem;letter-spacing:.18em;color:#7d889f;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.graph-wrap{flex:1;min-height:200px;display:flex;align-items:flex-start;justify-content:center;overflow:hidden}
#graph{width:100%;height:auto;max-height:calc(100vh - 240px);display:none}
.empty{color:var(--muted);text-align:center;padding:40px 16px;font-size:.84rem}
.node{animation:pop .55s ease var(--d,0ms) both;transform-box:fill-box;transform-origin:center}
.node rect{fill:rgba(0,0,0,.6);stroke:#4b5878;stroke-width:1.5;transition:fill .5s,stroke .5s,filter .5s}
.node text{fill:#e8ecf4;font:500 12.5px 'Inter',sans-serif;text-anchor:middle;dominant-baseline:central;pointer-events:none}
.node.mastered rect{fill:rgba(16,38,15,.7);stroke:var(--green);filter:drop-shadow(0 0 7px rgba(118,185,0,.6))}
.node.gap rect{fill:rgba(52,16,26,.7);stroke:var(--red);filter:drop-shadow(0 0 7px rgba(255,93,115,.6))}
.node.probing rect{fill:rgba(12,37,54,.75);stroke:var(--cyan);filter:drop-shadow(0 0 9px rgba(34,211,238,.75));animation:nodepulse 1.4s ease-in-out infinite}
.edge{fill:none;stroke:#4b5878;stroke-width:1.3;stroke-dasharray:5 6;opacity:0;animation:edgeIn .6s ease var(--d,0ms) forwards,flow 1.3s linear infinite;transition:stroke .5s}
.edge.ok{stroke:var(--green)}
.legend{display:flex;flex-wrap:wrap;gap:14px;font-size:.64rem;color:#8d9bb8;margin-top:12px}
.legend i{display:inline-block;width:8px;height:8px;margin-right:6px}

/* ---------- Chat page (pinned to the page, only the messages scroll) ---------- */
#page-chat{position:relative;overflow:hidden}
#page-chat .chat{position:absolute;inset:0}
.chat{display:flex;flex-direction:column;border:1px solid var(--line);background:rgba(0,0,0,.3);backdrop-filter:blur(3px)}
.chat-log{flex:1 1 0%;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:22px;display:flex;flex-direction:column;gap:18px}
.msg{display:flex;max-width:88%;animation:fadeUp .3s ease}
.msg.user{align-self:flex-end}
.avatar{display:none}
.bubble{min-width:0}
.msg.user .bubble{padding:8px 13px;border:1px solid var(--line2);background:rgba(255,255,255,.07)}
.bubble p{margin:4px 0}.bubble ul,.bubble ol{margin:6px 0 6px 20px}
.meta{font-size:.62rem;color:#5d6880;margin-top:5px}
.typing .body:empty::after,.typing .body p:last-child::after{content:"▍";color:var(--green);animation:blink 1s steps(1) infinite}
.err{color:#ff9aa8}
.composer{display:flex;flex-wrap:wrap;gap:10px;padding:14px 20px 8px;border-top:1px solid var(--line);align-items:flex-end;flex-shrink:0}
.composer .input{flex:1;min-width:200px;resize:none;max-height:140px}
.seg{display:inline-flex;flex-shrink:0;border:1px solid var(--line2)}
.seg button{padding:10px 14px;border:none;background:transparent;color:#9aa5bb;font:500 .8rem 'Inter',sans-serif;cursor:pointer;transition:all .2s}
.seg button:hover{color:#fff}
.seg button.on{background:#fff;color:#000;font-weight:600;text-shadow:none}
.mode-hint{padding:0 22px 12px;font-size:.62rem;color:#5d6880;flex-shrink:0}

/* ---------- Brain / privacy ---------- */
.brow{display:flex;justify-content:space-between;font-size:.84rem;margin-top:10px;color:#cfd6e6}
.bar{height:3px;background:rgba(255,255,255,.1);overflow:hidden;margin-top:4px}
.fill{height:100%;transition:width .6s}
.item{padding:9px 0;border-bottom:1px solid var(--line);font-size:.88rem}
.item small{display:block;color:var(--muted);font-family:'JetBrains Mono',monospace;font-size:.64rem;margin-top:2px}
.notes{margin-top:12px}
.json{max-height:340px;overflow:auto;font:.74rem/1.5 'JetBrains Mono',monospace;color:#b9c4dc;white-space:pre-wrap;word-break:break-word}

/* ---------- Maths blocks, dividers, toast ---------- */
.mathblock{margin:8px 0;max-width:100%;overflow-x:auto;overflow-y:hidden}
.mathblock .katex-display{margin:.4em 0}
.b hr,.bubble hr{border:none;border-top:1px solid var(--line);margin:12px 0}
#toast{position:fixed;bottom:26px;left:50%;transform:translate(-50%,30px);opacity:0;z-index:70;padding:11px 18px;
  background:rgba(20,8,12,.95);border:1px solid rgba(255,93,115,.55);color:#ffd5db;transition:all .3s;max-width:90vw;pointer-events:none}
#toast.show{opacity:1;transform:translate(-50%,0)}
#toast.ok{border-color:rgba(118,185,0,.6);background:rgba(8,20,8,.95);color:#e1f5c4}
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.14)}

/* ---------- Small laptops and tablets ---------- */
@media (min-width:821px) and (max-width:1100px){
  .rc.has-map{grid-template-columns:1fr;row-gap:20px}
  .rc.has-map .rc-chat{height:70vh}
  .rc-map{transform:none}
}

/* ---------- Phones: app-style layout with a bottom tab bar ---------- */
@media (max-width:820px){
  body{font-size:15px}
  .app{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-rows:auto minmax(0,1fr) auto;
    grid-template-areas:"brand new" "main main" "nav nav";height:100vh;height:100dvh}
  .sidebar{display:contents}
  .brand{grid-area:brand;padding:12px 14px 4px}
  .brand img{width:26px;height:26px}
  .brand-name{font-size:.88rem;letter-spacing:.24em}
  .newbtn{grid-area:new;align-self:center;margin:8px 14px 0 0;padding:8px 12px;font-size:.78rem;white-space:nowrap}
  .main{grid-area:main;padding:8px 14px}
  .nav{grid-area:nav;flex-direction:row;gap:0;border-top:1px solid var(--line);background:rgba(0,0,0,.92);
    padding:2px 4px calc(2px + env(safe-area-inset-bottom,0px))}
  .nav button{flex:1;justify-content:center;text-align:center;padding:8px 4px;font-size:.72rem;line-height:1.25;min-height:50px;border-radius:0}
  .nav button.active{box-shadow:inset 0 2px 0 var(--green)}
  .nav button.primary-nav{font-size:.74rem}
  .nav button.primary-nav em,.nav-sep,.recent-label,.recent,.side-foot{display:none}

  .topbar{margin:0 0 8px;gap:6px;align-items:flex-start}
  .ptitle{font-size:.8rem;letter-spacing:.2em}
  .page-sub{font-size:.72rem}
  .chips-row{gap:8px}
  .pill:not(.hot){display:none}
  .page{overflow-y:auto}
  .grid2{grid-template-columns:1fr;gap:0}
  .sec{padding-bottom:16px;margin-bottom:16px}
  .row .input{flex:1 1 100%;min-width:0}
  .sec .row .btn{flex:1 1 100%}
  .json{max-height:260px}

  .input,select.input,textarea.input{font-size:16px}
  .btn{min-height:44px;font-size:.9rem}
  .btn.small{min-height:36px}
  .chip{padding:8px 12px;font-size:.8rem}
  .hint{display:none}

  /* Root-Cause: one panel at a time, switched with Chat / Map */
  #page-root.has-map .rc-switch{display:flex}
  .rc,.rc.has-map{grid-template-columns:minmax(0,1fr);column-gap:0;row-gap:0}
  .rc:not(.has-map) .rc-chat{max-width:none}
  .rc .rc-chat,.rc.has-map .rc-chat{height:100%;border-left:none;border-right:none;background:rgba(0,0,0,.55);backdrop-filter:none}
  .rc.has-map .rc-map{display:none;opacity:1;transform:none}
  .rc.has-map.m-map .rc-chat{display:none}
  .rc.has-map.m-map .rc-map{display:flex}
  .thread{padding:14px;gap:14px}
  .b{font-size:.9rem}
  .m.user{max-width:92%}
  .steps{padding:8px 12px;overflow-x:auto;flex-wrap:nowrap;white-space:nowrap}
  .sp{flex-shrink:0}
  .composer-rc{padding:10px 12px}
  .start{padding:6px 2px}
  .hero-h{font-size:1.05rem;letter-spacing:.1em}
  .hero-p{font-size:.84rem}
  .start .row{flex-direction:column;align-items:stretch}
  .start .row select,.start .row .btn{width:100%}
  .start .input.big{padding:12px 14px}
  .review-panel{max-width:none;margin-top:18px;padding:14px}
  .graph-wrap{min-height:0}
  #graph{max-height:calc(100dvh - 290px)}
  .node text{font-size:13px}
  .legend{gap:10px}

  /* Chat page */
  .chat{backdrop-filter:none;background:rgba(0,0,0,.55);border-left:none;border-right:none}
  .chat-log{padding:14px;gap:14px}
  .msg{max-width:94%}
  .chips.pad{padding:0 14px 8px}
  .composer{padding:10px 12px 4px;gap:8px}
  .composer .input{flex:1 1 100%;order:1;min-width:0}
  .composer .seg{order:2}
  .composer #chat-send{order:3;flex:1}
  .seg button{padding:11px 18px}
  .mode-hint{padding:0 14px 10px}

  #toast{bottom:84px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
}