:root{
  --bg:#F5F1E8; --bg2:#EDE8DB; --line:#DED7C7; --line2:#C7BFAC;
  --bone:#15150F; --bone2:#514C42; --bone3:#8A8375;
  --gold:#D2341B; --acc:#D2341B;
  --ink-panel:#15150F;
  --display:"Inter","Helvetica Neue",Arial,sans-serif;
  --body:"Inter","Helvetica Neue",Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--bone);font-family:var(--body);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
svg{display:block}
a{color:inherit}
p{margin:0}
h1,h2,h3{margin:0;font-family:var(--display);font-weight:600;font-optical-sizing:auto;line-height:1.02;letter-spacing:-.032em;text-wrap:balance}
h1{font-size:min(8.4vw,12vh,124px);line-height:.96}
h2{font-size:clamp(30px,4.2vw,58px)}
h3{font-size:clamp(21px,2.1vw,28px)}
.in{max-width:1280px;margin:0 auto;padding:0 clamp(20px,4vw,56px)}
.mono{font-family:var(--mono);font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--bone3)}
.mark{fill:currentColor}
.gold{color:var(--gold)}

/* nav */
.nav{border-bottom:1px solid var(--line)}
.nav .in{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:16px;padding-bottom:16px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand svg{width:24px;height:24px;color:var(--bone)}
.brand b{font-family:var(--mono);font-weight:500;letter-spacing:.26em;font-size:13px}
.brand b::after{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--acc);margin-left:12px;vertical-align:middle;animation:blink 2.4s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.15}}
.nav nav{display:flex;align-items:center;gap:28px}
.nav a.lk{font-size:14.5px;color:var(--bone2);text-decoration:none;padding-bottom:2px;border-bottom:1px solid transparent}
.nav a.lk:hover{color:var(--bone);border-bottom-color:var(--gold)}
.lang{display:flex;gap:8px;font-family:var(--mono);font-size:11.5px;letter-spacing:.14em}
.lang button{background:none;border:0;color:var(--bone3);cursor:pointer;font:inherit;padding:2px 0}
.lang button[aria-pressed="true"]{color:var(--bone);border-bottom:1px solid var(--gold)}

/* buttons — light on black; gold never fills */
.btn{display:inline-flex;align-items:center;gap:12px;font-family:var(--body);font-weight:500;font-size:15.5px;letter-spacing:.01em;
  padding:clamp(12px,1.8vh,17px) 26px;background:var(--bone);color:#F5F1E8;border:1px solid var(--bone);text-decoration:none;cursor:pointer;transition:opacity .15s,transform .12s}
.btn:hover{opacity:.88;transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--bone);border-color:var(--line2)}
.btn.ghost:hover{border-color:var(--bone)}
.btn.ghost:hover{border-color:var(--bone2);opacity:1}
.btn:focus-visible,.opt:focus-visible,.lang button:focus-visible,input:focus-visible{outline:2px solid var(--gold);outline-offset:3px}
.undernote{margin-top:10px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--bone3);text-transform:uppercase}

/* hero: flight across the top, text below-left */
.hero{position:relative;padding-bottom:clamp(26px,4vh,64px);border-bottom:1px solid var(--line);min-height:calc(100vh - 70px);display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden}
.flight{position:absolute;left:0;right:0;top:clamp(46px,7vh,86px);height:min(34%,26vh,290px);z-index:2;pointer-events:none}
.flight svg{width:100%;height:100%}
.hero .in{position:relative;z-index:1}
.hero .in.top{z-index:3;margin-bottom:auto;width:100%}
.path-line{fill:none;stroke:var(--gold);stroke-width:1.5;opacity:.75}
.dot{fill:var(--gold)}
.wp text{font-family:var(--body);fill:var(--bone);font-size:13px;paint-order:stroke;stroke:var(--bg);stroke-width:7px;stroke-linejoin:round}
.wp text.sub{fill:var(--bone2);font-size:10.5px;paint-order:stroke;stroke:var(--bg);stroke-width:6px;stroke-linejoin:round}
.wp{opacity:0}
.bird{color:var(--bone)}
.hero .cols{display:block;margin-top:clamp(18px,3vh,44px)}
.hero h1 i{font-style:normal;font-weight:400;color:var(--bone2)}
.hero .lede{margin-top:clamp(14px,2vh,28px);max-width:52ch;color:var(--bone2);font-size:clamp(16px,1.5vw,19px)}
.hero .acts{display:flex;gap:14px;flex-wrap:wrap;margin-top:clamp(16px,2.4vh,32px);align-items:flex-start}
.facts{display:grid;gap:14px;padding-bottom:6px}
.facts div{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding-top:12px}
.facts b{font-family:var(--mono);font-weight:500;font-size:15px;color:var(--bone)}
.facts span{font-size:14px;color:var(--bone3);text-align:right}


/* scroll rail — the swift carries you down the page */
.rail{position:fixed;right:clamp(14px,2.2vw,34px);top:14vh;bottom:12vh;width:30px;z-index:6;pointer-events:none}
.rail .track{position:absolute;left:50%;top:0;bottom:0;width:1px;transform:translateX(-50%);background:rgba(138,131,117,.45)}
.rail .done{position:absolute;left:50%;top:0;width:1px;transform:translateX(-50%);background:var(--acc);height:0}
.rail .tick{position:absolute;left:50%;width:9px;height:1px;transform:translateX(-50%);background:rgba(138,131,117,.7)}
.rail .tick b{position:absolute;right:16px;top:-7px;font-family:var(--mono);font-size:9px;letter-spacing:.16em;text-transform:uppercase;color:var(--acc);white-space:nowrap;opacity:0;transition:opacity .3s}
.rail .tick.near b{opacity:1}
.rail .bird{position:absolute;left:50%;top:0;width:26px;height:26px;margin-left:-13px;margin-top:-13px;color:var(--acc);will-change:transform;filter:drop-shadow(0 0 6px rgba(210,52,27,.25))}
@media (max-width:1180px){ .rail{display:none} }


.nav a.lk.active{color:var(--bone);border-bottom-color:var(--acc)}
.rv{opacity:.001;transform:translateY(14px);transition:opacity .65s cubic-bezier(.2,.7,.3,1),transform .65s cubic-bezier(.2,.7,.3,1)}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){ .rv{opacity:1;transform:none;transition:none} }

/* sections */
/* light sections — the page breathes between black and bone */
section.light{--bone2:#BDB6A7;--bone3:#AAA394;background:var(--ink-panel);color:#F1ECE0;border-bottom:1px solid #26261C}
section.light .mono{color:#8E8779}
section.light h2,section.light h3{color:#F5F1E8}
section.light p{color:#BDB6A7}
section.light .mods{background:#26261C;border-color:#26261C}
section.light .mod{background:#15150F}
section.light .mod:nth-child(2){background:#1C1C15}
section.light .mod p,section.light .mod ul{color:#BDB6A7}
section.light .mod li{border-top-color:#26261C}
section.light .mod .n{color:#F06A4F}
section.light .nums{background:#26261C;border-color:#26261C}
section.light .nums div{background:#15150F}
section.light .nums b{color:#F5F1E8}
section.light .nums span{color:#8E8779}
section.light .gold{color:#F06A4F}

section{padding:clamp(64px,8vw,120px) 0;border-bottom:1px solid var(--line)}
.head2{display:grid;grid-template-columns:.34fr .66fr;gap:clamp(20px,3vw,50px);align-items:start}
.mods{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:clamp(34px,4vw,56px)}
.mod{background:#FBF8F1;padding:clamp(24px,2.6vw,36px);display:flex;flex-direction:column;gap:14px}
.mod:nth-child(2){background:#EFEADD}
.mod .n{font-family:var(--mono);font-size:11.5px;letter-spacing:.2em;color:var(--gold)}
.mod p{color:var(--bone2);font-size:15.5px}
.mod ul{margin:6px 0 0;padding:0;list-style:none;font-size:14.5px;color:var(--bone2)}
.mod li{padding:7px 0;border-top:1px solid var(--line)}

/* comparison */
.tbl{margin-top:clamp(30px,4vw,52px);border-top:1px solid var(--line2)}
.tbl .r{display:grid;grid-template-columns:1.1fr 1fr 1fr;border-bottom:1px solid var(--line);padding:18px 0;gap:20px}
.tbl .r>div:nth-child(2){color:var(--bone3)}
.tbl .r>div:nth-child(3){color:var(--bone)}
.tbl .hd>div{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--bone3)}
.tbl .hd>div:nth-child(3){color:var(--gold)}

/* numbers */
.nums{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:clamp(30px,4vw,50px)}
.nums div{background:#FBF8F1;padding:26px}
.nums b{display:block;font-family:var(--display);font-weight:600;letter-spacing:-.03em;font-size:clamp(38px,4.4vw,62px);line-height:1;color:var(--bone)}
.nums span{display:block;margin-top:12px;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--bone3)}

/* quiz */
.cons{margin-top:clamp(30px,4vw,50px);border:1px solid var(--line2);background:#FBF8F1}
.cons .top{display:flex;align-items:center;gap:14px;padding:13px 22px;border-bottom:1px solid var(--line2);font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--bone3)}
.cons .top i{width:6px;height:6px;border-radius:50%;background:var(--gold);flex:none}
.cons .top .pr{margin-left:auto;color:var(--bone2)}
.cons .pad{padding:clamp(24px,3.2vw,44px)}
.step{display:none}.step.on{display:block}
.opts{display:grid;margin-top:26px;border-top:1px solid var(--line)}
.opt{text-align:left;font:inherit;font-size:16.5px;color:var(--bone);background:transparent;border:0;border-bottom:1px solid var(--line);
  padding:18px 4px;cursor:pointer;display:flex;align-items:center;gap:18px;transition:padding-left .15s,color .15s}
.opt::before{content:attr(data-k);font-family:var(--mono);font-size:11px;color:var(--bone3);width:20px;flex:none}
.opt:hover{padding-left:14px}
.opt:hover::before{color:var(--gold)}
.opt.sel{color:var(--gold)}
.plan{border:1px solid var(--bone);padding:clamp(22px,3vw,34px);background:#FBF8F1}
.plan .out{margin-top:14px;white-space:pre-wrap;color:var(--bone2);line-height:1.75}
.acts2{display:flex;gap:14px;flex-wrap:wrap;margin-top:26px;align-items:center}
.aidisc{margin-top:16px;font-family:var(--mono);font-size:11px;line-height:1.8;color:var(--bone3)}
.chat{margin-top:24px;display:grid;gap:12px}
.msg{padding:15px 18px;border:1px solid var(--line);white-space:pre-wrap;font-size:15.5px}
.msg.me{margin-left:12%;color:var(--bone2)}
.msg.ai{border-color:var(--line2);background:#FBF8F1}
.chatline{display:flex;gap:12px;margin-top:16px;flex-wrap:wrap}
.chatline input{flex:1;min-width:220px;font:inherit;font-size:15.5px;padding:15px 17px;border:1px solid var(--line2);background:transparent;color:var(--bone)}
.chatline input::placeholder{color:var(--bone3)}
.spin{display:inline-block;width:13px;height:13px;border:2px solid var(--gold);border-top-color:transparent;border-radius:50%;animation:sp .7s linear infinite;vertical-align:-1px}
@keyframes sp{to{transform:rotate(360deg)}}

/* close */
.close{text-align:left}
.close .in{display:grid;grid-template-columns:1.2fr .8fr;gap:clamp(24px,4vw,60px);align-items:end}
.close .sw{width:74px;color:var(--bone);margin-bottom:22px}

footer{padding:44px 0 60px;color:var(--bone3);font-size:14px}
footer .cols{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
footer b{display:block;font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--bone3);margin-bottom:12px}
footer p{color:var(--bone2);line-height:1.8}
footer a{color:var(--bone2);text-decoration:none;border-bottom:1px solid var(--line2)}
footer a:hover{color:var(--bone)}

@media (max-width:900px){
  .hero .cols,.head2,.close .in{grid-template-columns:1fr}
  .mods{grid-template-columns:1fr}
  .nums{grid-template-columns:1fr 1fr}
  .tbl .r{grid-template-columns:1fr;gap:6px}
  .tbl .hd{display:none}
  .msg.me{margin-left:0}
  footer .cols{grid-template-columns:1fr}
  .nav nav .lk{display:none}
}
@media (prefers-reduced-motion:reduce){ .btn{transition:none} }
footer a{overflow-wrap:anywhere}.aidisc{margin-top:18px}

.legal{max-width:850px;margin:auto;padding:60px 24px}.legal h1{font-size:clamp(34px,6vw,64px);margin:32px 0}.legal h2{font-size:24px;margin:32px 0 12px}.legal p{margin:16px 0}.legal a{overflow-wrap:anywhere}.review-note{border-left:3px solid var(--acc);padding-left:18px}