/* ========== THE HUMAN BRAIN — styles ========== */
:root{
  --bg:#070912;
  --bg-2:#0d1122;
  --panel:rgba(20,25,46,.72);
  --panel-solid:#141a2e;
  --line:rgba(140,160,220,.16);
  --text:#eef2ff;
  --muted:#9aa6c9;
  --accent:#7c5cff;
  --accent-2:#26e0c8;
  --frontal:#ff7a59;
  --parietal:#4ade80;
  --temporal:#a78bfa;
  --occipital:#38bdf8;
  --cerebellum:#fbbf24;
  --brainstem:#f472b6;
  --good:#4ade80;
  --bad:#fb7185;
  --radius:18px;
  --shadow:0 20px 60px rgba(0,0,0,.55);
}

*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  font-size:17px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
#bg-glow{
  position:fixed; inset:0; z-index:0; pointer-events:none;
  background:
    radial-gradient(60vw 60vw at 15% 10%, rgba(124,92,255,.20), transparent 60%),
    radial-gradient(50vw 50vw at 85% 20%, rgba(38,224,200,.14), transparent 60%),
    radial-gradient(60vw 50vw at 50% 100%, rgba(244,114,182,.12), transparent 60%),
    linear-gradient(180deg,#070912 0%,#0a0e1c 50%,#070912 100%);
}
h1,h2,h3{margin:0 0 .4em;line-height:1.15;letter-spacing:.4px}
p{margin:0 0 .9em}
strong{color:#fff}

/* ---------- screens ---------- */
.screen{
  position:relative; z-index:1;
  display:none; min-height:100dvh;
  padding:20px clamp(14px,3vw,34px) 40px;
  animation:fade .45s ease both;
}
.screen.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

/* ---------- buttons ---------- */
.btn{
  font:inherit; font-weight:700; letter-spacing:.5px;
  border:1px solid transparent; border-radius:999px;
  padding:12px 22px; cursor:pointer; color:var(--text);
  background:rgba(255,255,255,.06);
  transition:transform .15s ease, background .2s ease, box-shadow .25s ease, border-color .2s;
  -webkit-tap-highlight-color:transparent;
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn:focus-visible{outline:3px solid var(--accent-2);outline-offset:3px}
.btn-primary{
  background:linear-gradient(120deg,var(--accent),#b06bff 55%,var(--accent-2));
  color:#0a0714; box-shadow:0 10px 30px rgba(124,92,255,.45);
}
.btn-primary:hover{box-shadow:0 16px 44px rgba(124,92,255,.6)}
.btn-ghost{background:rgba(255,255,255,.05);border-color:var(--line);color:var(--muted)}
.btn-ghost:hover{color:#fff;border-color:rgba(160,180,255,.45);background:rgba(255,255,255,.1)}
.btn-lg{padding:16px 34px;font-size:1.05rem}
.btn-sm{padding:8px 16px;font-size:.85rem}
.btn-block{display:block;width:100%;margin-top:18px}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}

/* ---------- home ---------- */
.home-wrap{
  min-height:calc(100dvh - 60px);
  display:flex; align-items:center; justify-content:center;
  gap:clamp(20px,5vw,70px); flex-wrap:wrap-reverse;
}
.home-brain{width:min(46vw,520px);min-width:290px;filter:drop-shadow(0 0 60px rgba(124,92,255,.45));animation:float 7s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(-8px)}50%{transform:translateY(10px)}}
.home-copy{max-width:540px}
.eyebrow{
  font-size:.8rem;letter-spacing:3px;text-transform:uppercase;color:var(--accent-2);
  margin-bottom:.6em;font-weight:700;
}
.title{
  font-size:clamp(2.6rem,7vw,4.6rem);font-weight:900;letter-spacing:2px;
  background:linear-gradient(100deg,#fff 10%,#c9b6ff 45%,#5ef2d6 90%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  text-shadow:0 0 60px rgba(124,92,255,.25);
}
.subtitle{font-size:clamp(1.05rem,2vw,1.35rem);color:var(--muted)}
.home-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.home-progress{margin-top:18px;color:var(--accent-2);font-weight:700;min-height:1.4em}

/* ---------- topbar / progress ---------- */
.topbar{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;
  background:var(--panel);border:1px solid var(--line);backdrop-filter:blur(14px);
  border-radius:var(--radius);padding:12px 16px;margin-bottom:20px;
}
.progress-block{flex:1;min-width:190px}
.progress-label{display:flex;justify-content:space-between;font-size:.82rem;color:var(--muted);letter-spacing:1px;text-transform:uppercase}
.progress-label strong{color:#fff}
.progress-track{height:10px;border-radius:99px;background:rgba(255,255,255,.08);overflow:hidden;margin-top:6px}
.progress-fill{
  height:100%;width:0%;border-radius:99px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  box-shadow:0 0 18px rgba(38,224,200,.6);
  transition:width .7s cubic-bezier(.2,.9,.25,1);
}
.score-chip{
  background:rgba(124,92,255,.16);border:1px solid rgba(124,92,255,.4);
  padding:8px 16px;border-radius:999px;font-size:.9rem;color:var(--muted);white-space:nowrap;
}
.score-chip strong{color:#fff;font-size:1.05rem}

/* ---------- map ---------- */
.map-layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,.9fr);gap:22px;align-items:start}
.map-stage{
  position:relative;background:var(--panel);border:1px solid var(--line);border-radius:26px;
  padding:10px 10px 4px;backdrop-filter:blur(10px);box-shadow:var(--shadow);overflow:hidden;
}
.map-stage::before{
  content:"";position:absolute;inset:-40%;
  background:radial-gradient(circle at 50% 45%,rgba(124,92,255,.22),transparent 55%);
  animation:pulseGlow 6s ease-in-out infinite;pointer-events:none;
}
@keyframes pulseGlow{0%,100%{opacity:.55}50%{opacity:1}}
.map-hint{
  position:relative;text-align:center;color:var(--muted);font-size:.9rem;
  letter-spacing:2px;text-transform:uppercase;padding:8px 0 0;
}
.brain-holder{position:relative}
.map-side{display:flex;flex-direction:column;gap:16px}

.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;backdrop-filter:blur(12px);box-shadow:var(--shadow);
}
.card-title{font-size:.85rem;letter-spacing:2.5px;text-transform:uppercase;color:var(--accent-2)}
.system-card p,.fact-card p{color:var(--muted);font-size:.98rem;margin-bottom:0}
.fact-text{min-height:5.4em;transition:opacity .3s}
#btn-next-fact{margin-top:12px}

.region-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.region-item{
  display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:14px;cursor:pointer;
  border:1px solid var(--line);background:rgba(255,255,255,.03);
  transition:transform .15s,background .2s,border-color .2s;
}
.region-item:hover{transform:translateX(4px);background:rgba(255,255,255,.08);border-color:var(--rc)}
.region-item .dot{width:12px;height:12px;border-radius:50%;background:var(--rc);box-shadow:0 0 14px var(--rc);flex:none}
.region-item .nm{flex:1;font-weight:700;font-size:.98rem}
.region-item .st{font-size:.82rem;color:var(--muted)}
.region-item.done{border-color:rgba(74,222,128,.45)}
.region-item.done .st{color:var(--good);font-weight:700}

/* ---------- brain svg ---------- */
.brain-svg{width:100%;height:auto;display:block;overflow:visible}
.region-shape{
  fill:var(--rc);
  opacity:.62;
  stroke:rgba(6,8,18,.85);stroke-width:2.5;
  transition:opacity .3s ease, filter .3s ease, transform .3s ease;
  cursor:pointer;transform-box:fill-box;transform-origin:center;
}
.brain-svg .region:hover .region-shape,
.brain-svg .region.hot .region-shape{opacity:1;filter:drop-shadow(0 0 16px var(--rc)) drop-shadow(0 0 34px var(--rc))}
.brain-svg .region:hover .region-shape{transform:scale(1.015)}
.brain-svg .region.dim .region-shape{opacity:.18;filter:none}
.brain-svg .region.sel .region-shape{opacity:1;filter:drop-shadow(0 0 20px var(--rc)) drop-shadow(0 0 48px var(--rc));animation:selPulse 2.4s ease-in-out infinite}
@keyframes selPulse{0%,100%{filter:drop-shadow(0 0 14px var(--rc))}50%{filter:drop-shadow(0 0 30px var(--rc)) drop-shadow(0 0 60px var(--rc))}}
.brain-svg .rlabel{
  fill:#0a0d18;font-size:15px;font-weight:800;letter-spacing:.6px;pointer-events:none;
  paint-order:stroke;stroke:rgba(255,255,255,.55);stroke-width:.5px;
}
.brain-svg .rlabel.out{fill:#dfe6ff;stroke:none;font-size:14px}
.brain-svg .rlabel.faded{fill:#93a2cc;stroke:none;transition:fill .3s}
.brain-svg .leader{stroke:rgba(200,215,255,.5);stroke-width:1.5;fill:none;pointer-events:none}
.brain-svg .check{pointer-events:none}
.brain-svg .check circle{fill:rgba(9,20,14,.92);stroke:#4ade80;stroke-width:2}
.brain-svg .check text{fill:#4ade80;font-size:15px;font-weight:900;stroke:none}
.brain-svg .folds{fill:none;stroke:rgba(8,10,20,.35);stroke-width:2.4;stroke-linecap:round;pointer-events:none}
.brain-svg .outline{fill:none;stroke:rgba(190,205,255,.35);stroke-width:2.5;pointer-events:none}

/* ---------- region screen ---------- */
.region-layout{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(320px,1fr);gap:22px;align-items:start}
.region-visual{
  background:var(--panel);border:1px solid var(--line);border-radius:26px;padding:12px;
  backdrop-filter:blur(10px);box-shadow:var(--shadow);position:sticky;top:16px;
}
.region-nav{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:6px 6px 2px}
.region-nav-dots{display:flex;gap:7px}
.nav-dot{width:9px;height:9px;border-radius:50%;background:rgba(255,255,255,.2);transition:.25s;cursor:pointer}
.nav-dot.on{background:var(--rc,#fff);box-shadow:0 0 12px var(--rc,#fff);transform:scale(1.35)}

.region-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.region-head h2{font-size:clamp(1.5rem,3.2vw,2.1rem);margin:0;font-weight:900;letter-spacing:1px}
.region-dot{width:16px;height:16px;border-radius:50%;background:var(--rc);box-shadow:0 0 20px var(--rc)}
.badge{font-size:.72rem;padding:4px 11px;border-radius:99px;letter-spacing:1.2px;font-weight:800;text-transform:uppercase}
.badge-done{background:rgba(74,222,128,.16);color:var(--good);border:1px solid rgba(74,222,128,.45)}
.region-tag{color:var(--rc);font-weight:700;margin-top:2px}
.section-h{
  font-size:.78rem;letter-spacing:2.5px;text-transform:uppercase;color:var(--accent-2);
  margin-top:20px;margin-bottom:6px;
}
.example{
  border-left:3px solid var(--rc);padding:10px 14px;background:rgba(255,255,255,.04);
  border-radius:0 12px 12px 0;color:#dbe3ff;
}
.teaches{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 4px}
.chip{
  font-size:.83rem;padding:6px 13px;border-radius:99px;font-weight:700;
  background:color-mix(in srgb,var(--rc) 18%,transparent);
  border:1px solid color-mix(in srgb,var(--rc) 45%,transparent);color:#fff;
}
.connected-note{
  margin-top:16px;font-size:.92rem;color:var(--muted);
  background:rgba(38,224,200,.07);border:1px dashed rgba(38,224,200,.3);
  padding:12px 14px;border-radius:14px;
}
.connected-note b{color:var(--accent-2)}

/* ---------- games ---------- */
.game-card{margin-top:18px;border-color:color-mix(in srgb,var(--rc) 40%,var(--line))}
.game-head{display:flex;align-items:center;justify-content:space-between;gap:10px}
.game-head h2{font-size:1.25rem;margin:0}
.game-instructions{color:var(--muted);font-size:.95rem;margin-top:8px}
.game-meta{display:flex;justify-content:space-between;font-size:.85rem;color:var(--accent-2);font-weight:800;letter-spacing:1px;min-height:1.3em}
.game-area{margin-top:14px;min-height:210px}
.game-foot{margin-top:14px;display:flex;gap:10px;flex-wrap:wrap}

.opt-grid{display:flex;flex-direction:column;gap:9px}
.opt{
  text-align:left;padding:13px 16px;border-radius:14px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);cursor:pointer;font:inherit;color:var(--text);
  transition:.18s;width:100%;
}
.opt:hover:not(:disabled){background:rgba(255,255,255,.1);border-color:var(--rc);transform:translateX(4px)}
.opt.correct{background:rgba(74,222,128,.18);border-color:var(--good);color:#eaffef}
.opt.wrong{background:rgba(251,113,133,.18);border-color:var(--bad);animation:shake .4s}
.opt.used{opacity:.35;pointer-events:none}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-8px)}75%{transform:translateX(8px)}}

.plan-list{list-style:none;margin:0 0 14px;padding:0;display:flex;flex-direction:column;gap:6px}
.plan-list li{
  padding:9px 14px;border-radius:12px;background:rgba(74,222,128,.12);
  border:1px solid rgba(74,222,128,.35);font-size:.95rem;animation:fade .3s both;
}
.plan-goal{font-weight:800;color:#fff;margin-bottom:10px}
.plan-empty{color:var(--muted);font-style:italic;font-size:.9rem;margin-bottom:10px}

.grid-pad{display:grid;gap:8px;max-width:340px;margin:0 auto}
.cell{
  aspect-ratio:1;border-radius:12px;background:rgba(255,255,255,.06);border:1px solid var(--line);
  cursor:pointer;transition:.18s;
}
.cell:hover{background:rgba(255,255,255,.14)}
.cell.lit{background:var(--rc);box-shadow:0 0 24px var(--rc);border-color:transparent;transform:scale(1.04)}
.cell.hit{background:rgba(74,222,128,.75);box-shadow:0 0 20px rgba(74,222,128,.7)}
.cell.miss{background:rgba(251,113,133,.6)}
.cell.show{background:color-mix(in srgb,var(--rc) 55%,transparent)}
.cell[disabled]{cursor:default}

.word-strip{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:22px 0}
.word{
  font-size:1.35rem;font-weight:800;letter-spacing:1px;padding:10px 18px;border-radius:14px;
  background:rgba(255,255,255,.07);border:1px solid var(--line);animation:fade .3s both;
}
.word-pick{
  font-size:1rem;padding:10px 16px;border-radius:12px;cursor:pointer;font:inherit;font-weight:700;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--text);transition:.15s;
}
.word-pick:hover{background:rgba(255,255,255,.12)}
.word-pick.on{background:color-mix(in srgb,var(--rc) 35%,transparent);border-color:var(--rc);color:#fff}
.word-pick.ok{background:rgba(74,222,128,.25);border-color:var(--good)}
.word-pick.no{background:rgba(251,113,133,.22);border-color:var(--bad)}
.word-pick.missed{border-style:dashed;border-color:var(--accent-2);color:var(--accent-2)}

.shape-grid{display:grid;gap:10px;justify-content:center}
.shape-btn{
  width:100%;aspect-ratio:1;border:none;background:transparent;cursor:pointer;padding:6px;border-radius:14px;
  transition:.15s;display:flex;align-items:center;justify-content:center;
}
.shape-btn:hover{background:rgba(255,255,255,.08);transform:scale(1.06)}
.shape-btn.right{background:rgba(74,222,128,.25);box-shadow:0 0 20px rgba(74,222,128,.4)}
.shape-btn.wrong{background:rgba(251,113,133,.25);animation:shake .4s}
.shape-btn svg{width:100%;height:100%;display:block}

.arena{
  position:relative;height:300px;border-radius:18px;overflow:hidden;
  background:radial-gradient(circle at 50% 50%,rgba(255,255,255,.05),rgba(0,0,0,.25));
  border:1px solid var(--line);cursor:crosshair;touch-action:manipulation;
}
.target{
  position:absolute;border-radius:50%;cursor:pointer;
  background:radial-gradient(circle at 35% 30%,#fff,var(--rc) 55%,color-mix(in srgb,var(--rc) 40%,#000));
  box-shadow:0 0 22px var(--rc);will-change:transform;
}
.target.pop{animation:pop .28s forwards}
@keyframes pop{to{transform:scale(2.1);opacity:0}}

.react-pad{
  height:250px;border-radius:18px;display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;font-size:1.5rem;font-weight:900;letter-spacing:1px;cursor:pointer;user-select:none;
  border:1px solid var(--line);background:rgba(255,255,255,.05);transition:background .12s;padding:16px;
}
.react-pad small{display:block;font-size:.85rem;font-weight:600;letter-spacing:0;color:var(--muted);margin-top:10px}
.react-pad.wait{background:rgba(251,113,133,.16)}
.react-pad.go{background:rgba(74,222,128,.85);color:#04140a}
.react-pad.go small{color:rgba(4,20,10,.7)}
.rt-list{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:12px}
.rt-pill{background:rgba(255,255,255,.07);border:1px solid var(--line);border-radius:99px;padding:5px 12px;font-size:.85rem;font-weight:700}

.feedback{margin-top:12px;font-weight:800;min-height:1.5em}
.feedback.ok{color:var(--good)}
.feedback.no{color:var(--bad)}
.result-box{text-align:center;padding:10px 0}
.result-score{font-size:3.4rem;font-weight:900;line-height:1;
  background:linear-gradient(100deg,#fff,var(--rc));-webkit-background-clip:text;background-clip:text;color:transparent}
.result-lab{color:var(--muted);letter-spacing:2px;text-transform:uppercase;font-size:.8rem}
.lesson{
  margin-top:16px;text-align:left;background:rgba(255,255,255,.05);border:1px solid var(--line);
  border-radius:14px;padding:14px 16px;font-size:.95rem;color:#dbe3ff;
}
.lesson b{color:var(--rc)}

/* ---------- final ---------- */
.final-wrap{max-width:1050px;margin:0 auto;text-align:center;padding-top:10px}
.final-hero{padding:24px 0 8px}
.trophy{font-size:5rem;filter:drop-shadow(0 0 40px rgba(124,92,255,.8));animation:float 5s ease-in-out infinite}
.final-title{font-size:clamp(2.2rem,6vw,4rem)}
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;margin:26px 0}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 10px;backdrop-filter:blur(10px)}
.stat-num{display:block;font-size:2.1rem;font-weight:900;background:linear-gradient(100deg,#fff,var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-lab{font-size:.78rem;letter-spacing:1.6px;text-transform:uppercase;color:var(--muted)}
.recap-card{text-align:left}
.recap-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;margin-top:14px}
.recap-item{border-left:3px solid var(--rc);padding:10px 14px;background:rgba(255,255,255,.04);border-radius:0 12px 12px 0}
.recap-item h4{margin:0 0 4px;font-size:1rem;color:var(--rc)}
.recap-item p{margin:0;font-size:.9rem;color:var(--muted)}
.recap-item .sc{font-size:.8rem;color:var(--good);font-weight:800;letter-spacing:1px}
.recap-note{margin-top:18px;color:var(--muted);font-size:.95rem;border-top:1px solid var(--line);padding-top:14px}
.final-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin:26px 0 10px}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:26px;transform:translate(-50%,20px);z-index:60;
  background:rgba(20,25,46,.96);border:1px solid var(--line);border-radius:14px;
  padding:13px 22px;font-weight:800;box-shadow:var(--shadow);opacity:0;transition:.35s;max-width:90vw;text-align:center;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .map-layout,.region-layout{grid-template-columns:1fr}
  .region-visual{position:static}
  .home-wrap{flex-direction:column-reverse;text-align:center;padding-top:10px}
  .home-copy{text-align:center}
  .home-actions{justify-content:center}
  .home-brain{width:min(85vw,430px)}
}
@media (max-width:620px){
  body{font-size:16px}
  .screen{padding:12px 12px 34px}
  .topbar{gap:10px;padding:10px 12px}
  .progress-block{order:3;width:100%;flex-basis:100%}
  .btn{padding:11px 18px}
  .btn-lg{padding:14px 24px;font-size:1rem}
  .card{padding:16px}
  .arena{height:260px}
  .word{font-size:1.1rem;padding:8px 14px}
  .brain-svg .rlabel{font-size:17px}
  .brain-svg .rlabel.out{font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001s!important;transition-duration:.05s!important}
}