:root{
  --cream:#f4f1ea; --paper:#fbf9f4; --ink:#121212; --muted:#6b675f; --line:#e3ded2; --red:#ff4d2e; --ok:#1f7a4a;
  --mono:'JetBrains Mono', ui-monospace, 'DejaVu Sans Mono', monospace;
  color-scheme: light;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:16px}
body{background:var(--cream);color:var(--ink);font-family:Inter,system-ui,sans-serif;line-height:1.5;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
[hidden]{display:none !important}
.wrap{max-width:1180px;margin:0 auto;padding:0 28px}
.mono{font-family:var(--mono)}
.fine{font-size:13px;color:var(--muted);font-weight:600}
svg.i{width:16px;height:16px;flex:none}

/* nav */
nav{display:flex;align-items:center;justify-content:space-between;padding:22px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:26px;letter-spacing:-.5px}
.brand svg{width:34px;height:34px}
.links{display:flex;align-items:center;gap:30px;font-weight:600;font-size:15px}
.links a.l{opacity:.7}
.links a.l:hover{opacity:1}
.ghicon{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:10px;border:2px solid transparent;color:var(--ink);transition:border-color .15s}
.ghicon svg{width:22px;height:22px}
.ghicon:hover{border-color:var(--ink)}
.ghicon.off{opacity:.45}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--ink);color:var(--cream);font-weight:700;font-size:15px;padding:13px 20px;border-radius:10px;border:2px solid var(--ink);transition:transform .15s;white-space:nowrap}
.btn:hover{transform:translateY(-2px)}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.red{background:var(--red);border-color:var(--red);color:#fff}
.btn[aria-disabled="true"],.btn:disabled{opacity:.42;cursor:not-allowed;transform:none}
.btn.busy{opacity:.7;cursor:progress}

/* hero */
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;padding:46px 0 64px}
h1{font-size:76px;line-height:.98;letter-spacing:-3px;font-weight:900}
h1 .eye{color:var(--red)}
.sub{font-size:20px;color:var(--muted);margin:22px 0 32px;max-width:520px}
.speech{background:var(--paper);border:2px solid var(--ink);border-radius:18px;padding:22px 24px 18px;position:relative;box-shadow:8px 8px 0 var(--ink)}
.speech:after{content:"";position:absolute;left:44px;bottom:-16px;width:26px;height:26px;background:var(--paper);border-right:2px solid var(--ink);border-bottom:2px solid var(--ink);transform:rotate(45deg)}
.speech .who{display:flex;justify-content:space-between;gap:12px;font-size:13px;font-weight:700;color:var(--muted);margin-bottom:10px}
.speech .who b{color:var(--ink)}
.said{font-family:var(--mono);font-size:22px;line-height:1.45;min-height:96px;overflow-wrap:anywhere}
.said .pr{color:var(--red)}
.said.quiet{font-family:Inter,system-ui,sans-serif;font-size:20px;font-weight:600;color:var(--ink)}
.said.quiet small{display:block;font-size:15px;font-weight:500;color:var(--muted);margin-top:6px}
.cursor{display:inline-block;width:12px;height:24px;background:var(--red);vertical-align:-4px;margin-left:2px;animation:blink 1s steps(1) infinite}
.said.quiet .cursor{display:none}
@keyframes blink{50%{opacity:0}}
.speech .row{display:flex;gap:10px;margin-top:16px}
.speech input{flex:1;min-width:0;font:inherit;font-size:15px;padding:12px 14px;border:2px solid var(--line);border-radius:10px;background:#fff;outline:none;color:var(--ink)}
.speech input:focus{border-color:var(--ink)}
.speech input:disabled{background:var(--paper)}
.verify{margin-top:12px}
.linkbtn{background:none;border:0;color:var(--muted);font-weight:700;font-size:13px;text-decoration:underline;text-underline-offset:3px;padding:0}
.linkbtn:hover{color:var(--ink)}
.verifybox{margin-top:10px;background:#fff;border:2px solid var(--line);border-radius:10px;padding:12px 14px;font-size:13px;color:var(--muted)}
.verifybox p{margin-bottom:8px}
.verifybox dl{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;font-family:var(--mono);font-size:12.5px;color:var(--ink)}
.verifybox dt{color:var(--muted)}
.verifybox dd{overflow-wrap:anywhere}
.verifybox a{color:var(--ink);font-weight:700;text-decoration:underline;text-underline-offset:3px}

.markbox{position:relative;display:flex;justify-content:center}
.markbox svg{width:100%;max-width:400px;height:auto}
.pupil{transition:transform .25s ease}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border:2px solid var(--ink);border-radius:18px;background:var(--paper);overflow:hidden}
.stat{padding:24px 26px;border-right:2px solid var(--ink);min-width:0}
.stat:last-child{border-right:0}
.stat .k{font-size:13px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.stat .v{font-size:40px;font-weight:900;letter-spacing:-1.5px;margin-top:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-variant-numeric:tabular-nums}
.stat .v small{font-size:18px;font-weight:700;color:var(--muted);letter-spacing:0}
.stat .fine{margin-top:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.meter{height:10px;background:var(--line);border-radius:6px;margin-top:12px;overflow:hidden}
.meter i{display:block;height:100%;background:var(--red);border-radius:6px;transition:width .6s ease}

/* sections */
section{padding:96px 0 0}
.eyebrow{font-size:13px;font-weight:800;color:var(--red);text-transform:uppercase;letter-spacing:.12em}
h2{font-size:48px;line-height:1.02;letter-spacing:-1.8px;font-weight:900;margin:10px 0 14px}
.lead{font-size:18px;color:var(--muted);max-width:620px}
.empty{padding:26px 24px;background:var(--paper);border:2px dashed var(--line);border-radius:14px;color:var(--muted);font-weight:600}

/* growth */
.growth{margin-top:36px;display:grid;gap:14px}
.g{display:grid;grid-template-columns:150px 1fr 110px;gap:24px;align-items:center;padding:20px 24px;background:var(--paper);border:2px solid var(--line);border-radius:14px}
.g .n{font-weight:800}
.g .n span{display:block;font-size:13px;font-weight:600;color:var(--muted)}
.g .t{font-family:var(--mono);font-size:18px;overflow-wrap:anywhere;min-width:0}
.g .p{text-align:right;font-weight:800;font-size:20px}
.g.now{border-color:var(--ink)}

/* how */
.how{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:40px}
.card{background:var(--paper);border:2px solid var(--ink);border-radius:18px;padding:28px;min-width:0}
.num{width:44px;height:44px;border-radius:12px;background:var(--ink);color:var(--cream);display:grid;place-items:center;font-weight:900;font-size:20px;margin-bottom:22px;flex:none}
.num.red,.how .card:nth-child(2) .num{background:var(--red)}
.card h3{font-size:22px;letter-spacing:-.5px;margin-bottom:8px}
.card p{color:var(--muted)}

.oss{margin-top:20px;display:flex;align-items:center;gap:20px;background:var(--paper);border:2px solid var(--ink);border-radius:18px;padding:22px 28px}
.osslogo{width:40px;height:40px;flex:none}
.osstext{flex:1;min-width:0}
.osstext b{display:block;font-size:20px;letter-spacing:-.4px}
.osstext span{color:var(--muted)}

/* teach */
.teachgrid{display:grid;grid-template-columns:1.25fr .75fr;gap:20px;margin-top:40px;align-items:start}
.teach{padding:30px;box-shadow:8px 8px 0 var(--ink)}
.step{display:flex;gap:18px;padding-bottom:24px;margin-bottom:24px;border-bottom:2px solid var(--line)}
.step .num{margin:0}
.step .sb{flex:1;min-width:0}
.step h3{font-size:20px;margin-bottom:4px}
.step p{font-size:15px;margin-bottom:14px}
.field{width:100%;font:inherit;font-size:15px;padding:12px 14px;border:2px solid var(--line);border-radius:10px;background:#fff;outline:none;color:var(--ink);resize:vertical}
.field.mono{font-family:var(--mono);font-size:14px}
.field:focus{border-color:var(--ink)}
.field:disabled{background:var(--paper);cursor:not-allowed}
.counter{text-align:right;font-size:13px;font-weight:700;color:var(--muted);margin-top:6px;font-variant-numeric:tabular-nums}
.counter.over{color:var(--red)}
.teachfoot{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.msg{font-weight:600;font-size:15px;min-width:0;overflow-wrap:anywhere}
.msg:empty{display:none}
.step.last{border-bottom:0;margin-bottom:8px;padding-bottom:8px}
.walletbar{display:flex;align-items:center;justify-content:space-between;gap:14px;background:#fff;border:2px solid var(--line);border-radius:14px;padding:14px 14px 14px 18px;margin-bottom:26px;flex-wrap:wrap}
.walletbar .wl{min-width:0}
.walletbar .wk{font-size:13px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.walletbar .wv{font-family:var(--mono);font-size:15px;font-weight:600;overflow-wrap:anywhere}
.walletbar .btn{padding:10px 16px;font-size:14px}
.oldburn{margin-top:18px;padding-top:18px;border-top:2px solid var(--line)}
.oldburn .ca{margin-bottom:12px}
.oldrow{display:flex;gap:10px;flex-wrap:wrap}
.oldrow .field{flex:1 1 220px;min-width:0}
.msg.err{color:#c4321a}
.msg.ok{color:var(--ok)}

.ca{display:flex;align-items:center;gap:12px;border-radius:12px;padding:12px 12px 12px 16px;font-family:var(--mono);font-size:15px;max-width:640px}
.ca.light{background:#fff;border:2px solid var(--line)}
.ca span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0}
.ca.na span{white-space:normal;color:var(--muted)}
.ca.na{padding:14px 16px}
.copy{display:inline-flex;align-items:center;gap:6px;font-family:Inter,system-ui,sans-serif;font-weight:700;font-size:14px;background:var(--ink);color:var(--cream);border:0;border-radius:8px;padding:8px 12px;flex:none}
.copy:disabled{opacity:.35;cursor:not-allowed}
.copy svg{width:14px;height:14px}

.queue h3{font-size:22px;letter-spacing:-.5px}
.qhead{display:flex;justify-content:space-between;align-items:baseline;gap:10px}
.qsub{font-size:15px;margin:4px 0 18px}
.qlist{list-style:none;display:grid;gap:10px}
.qlist li{display:grid;grid-template-columns:32px 1fr;gap:12px;padding:12px 14px;background:#fff;border:2px solid var(--line);border-radius:12px}
.qlist .pos{font-weight:900;font-size:15px}
.qlist .qt{font-family:var(--mono);font-size:14px;overflow-wrap:anywhere}
.qlist .qb{font-size:12px;color:var(--muted);font-weight:600;margin-top:4px}
.qlist .none{display:block;color:var(--muted);font-weight:600;background:transparent;border-style:dashed}

/* lessons log */
.log{margin-top:36px;border:2px solid var(--ink);border-radius:18px;background:var(--paper);overflow:hidden}
.log .empty{border:0;border-radius:0}
.lr{display:grid;grid-template-columns:80px 1fr 160px 120px 90px;gap:20px;align-items:center;padding:16px 24px;border-bottom:2px solid var(--line)}
.lr:last-child{border-bottom:0}
.lr.head{white-space:nowrap;font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;padding-top:14px;padding-bottom:12px;border-bottom-color:var(--ink)}
.lr .ln{font-weight:900;font-variant-numeric:tabular-nums}
.lr .lt{font-family:var(--mono);font-size:15px;overflow-wrap:anywhere;min-width:0}
.lr .lb{font-size:14px;font-weight:600;color:var(--muted)}
.lr .lb.holder{color:var(--ink);font-family:var(--mono);font-weight:500}
.lr .lc{font-weight:800;text-align:right;font-variant-numeric:tabular-nums}
.lr .lx{text-align:right}
.lr .lx a{font-weight:700;font-size:14px;text-decoration:underline;text-underline-offset:3px}
.lr .lx a:hover{color:var(--red)}
.more{display:flex;justify-content:center;margin-top:20px}

/* token */
.token{margin:96px 0 0;background:var(--paper);border:2px solid var(--ink);border-radius:24px;padding:44px;display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center}
.token h2{font-size:40px;margin:6px 0 10px}
.token .lead{font-size:17px;margin-bottom:22px}
.token .label{font-size:12px;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;margin:16px 0 8px}
.brainrow{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.brainrow a{font-size:15px;overflow-wrap:anywhere;min-width:0}
.brainrow a[href]{text-decoration:underline;text-underline-offset:3px;font-weight:500}
.brainrow a[href]:hover{color:var(--red)}
.brainrow a:not([href]){color:var(--muted)}
.tokside{display:flex;flex-direction:column;gap:12px;align-items:stretch;min-width:220px}
.tokside .fine{text-align:center}
.btn.big{font-size:17px;padding:16px 26px}

footer{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:44px 0 54px;color:var(--muted);font-size:14px;font-weight:600}
footer .brand{font-size:20px;color:var(--ink)}
footer .brand svg{width:26px;height:26px}
.fright{display:flex;align-items:center;gap:10px}
.xlink{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:10px;border:2px solid transparent;color:var(--ink)}
.xlink:hover{border-color:var(--ink)}
.xlink svg{width:18px;height:18px}

.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,20px);background:var(--ink);color:var(--cream);font-weight:700;font-size:14px;padding:12px 18px;border-radius:10px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;max-width:calc(100vw - 32px)}
.toast.show{opacity:1;transform:translate(-50%,0)}

@media (max-width:1060px){
  .lr{grid-template-columns:70px 1fr 120px 70px;}
  .lr .lx{grid-column:4}
  .lr .lb{display:none}
  .lr.head .lb{display:none}
}
@media (max-width:900px){
  .wrap{padding:0 16px}
  .links{gap:10px}
  .links a.l{display:none}
  .hero{grid-template-columns:1fr;gap:28px;padding-top:18px}
  .markbox{order:-1}
  .markbox svg{max-width:190px}
  h1{font-size:46px;letter-spacing:-1.6px}
  .sub{font-size:17px}
  .said{font-size:17px;min-height:80px}
  .said.quiet{font-size:18px}
  .stats{grid-template-columns:1fr 1fr}
  .stat{padding:18px}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:2px solid var(--ink)}
  .stat .v{font-size:30px}
  .stat .v small{font-size:15px}
  .stat .k{font-size:11.5px}
  .stat .fine{white-space:normal}
  h2{font-size:34px}
  section{padding-top:64px}
  .g{grid-template-columns:1fr auto;gap:8px 16px;padding:16px 18px}
  .g .t{grid-column:1/-1;grid-row:2;font-size:15px}
  .how{grid-template-columns:1fr}
  .oss{flex-direction:column;align-items:flex-start;padding:22px}
  .oss .btn{width:100%}
  .teachgrid{grid-template-columns:1fr}
  .teach{padding:20px;box-shadow:6px 6px 0 var(--ink)}
  .step{gap:14px}
  .step .num{width:36px;height:36px;font-size:17px;border-radius:10px}
  .teachfoot .btn{width:100%}
  .card{padding:22px}
  .ca{font-size:12px}
  .lr{grid-template-columns:1fr auto;gap:6px 14px;padding:14px 16px}
  .lr.head{display:none}
  .lr .ln{grid-column:1;grid-row:1}
  .lr .lc{grid-column:2;grid-row:1}
  .lr .lt{grid-column:1/-1;grid-row:2;font-size:14px}
  .lr .lb{display:block;grid-column:1;grid-row:3;font-size:13px}
  .lr .lx{grid-column:2;grid-row:3}
  .token{grid-template-columns:1fr;padding:24px;margin-top:64px;gap:24px}
  .token h2{font-size:30px}
  .token > *{min-width:0}
  .tokside{min-width:0}
  .speech .row{flex-direction:column}
  .speech{padding:18px 18px 16px}
  .hero > div{min-width:0}
  footer{flex-direction:column;gap:12px;text-align:center}
  .fright{flex-direction:column}
}