/* Asymptote — asmtg.site */

:root{
  --bg:#0B0D10; --bg-alt:#0F1318; --surface:#141920; --line:#232B35;
  --text-faint:#6B7687;
  --accent:#5B9DFF; --accent-soft:rgba(91,157,255,.12); --accent-line:rgba(91,157,255,.32);
  --radius:14px; --maxw:1120px;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}
:root[data-theme="light"]{
  --bg:#FBFBF9; --bg-alt:#F3F4F1; --surface:#FFFFFF; --line:#E1E3DE;
  --accent:#1D5FD8; --accent-soft:rgba(29,95,216,.08); --accent-line:rgba(29,95,216,.24);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:var(--sans); font-size:16px; line-height:1.6;
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
img{max-width:100%}
a{color:inherit}

.wrap{width:100%; max-width:var(--maxw); margin:0 auto; padding-inline:24px}
.skip{position:absolute;left:-9999px;top:0;background:var(--accent);color:#fff;padding:10px 16px;z-index:100}
.skip:focus{left:8px;top:8px;border-radius:8px}
:focus-visible{outline:2px solid var(--accent); outline-offset:3px; border-radius:4px}

.eyebrow{
  font-family:var(--mono); font-size:11.5px; letter-spacing:.16em; text-transform:uppercase;
  color:var(--accent); margin:0 0 14px;
}

/* ---------- head ---------- */
.site-head{
  position:sticky; top:0; z-index:50;
  background:color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line);
}
.head-inner{display:flex; align-items:center; gap:24px; height:62px}
.brand{display:flex; align-items:center; gap:10px; text-decoration:none; font-weight:600; letter-spacing:-.015em}
.brand-mark{width:26px;height:26px;flex:none}
.bm-axis{stroke:var(--line); stroke-width:2; stroke-dasharray:3 3; stroke-linecap:round; fill:none}
.bm-curve{stroke:var(--accent); stroke-width:2.4; fill:none; stroke-linecap:round}
.brand-text{font-size:16.5px}
.nav{margin-left:auto; display:flex; align-items:center; gap:28px}
.nav a{text-decoration:none; font-size:14.5px; color:var(--text-dim); transition:color .18s}
.nav a:hover{color:var(--text)}
.nav-cta{
  color:var(--text)!important; border:1px solid var(--line); padding:7px 15px; border-radius:999px;
}
.nav-cta:hover{border-color:var(--accent); background:var(--accent-soft)}
.theme-toggle{
  flex:none; width:36px;height:36px; display:grid;place-items:center;
  background:transparent; border:1px solid var(--line); border-radius:10px;
  color:var(--text-dim); cursor:pointer; transition:.18s;
}
.theme-toggle:hover{color:var(--text); border-color:var(--accent)}
.theme-toggle svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round}
.ico-moon{display:none}
:root[data-theme="light"] .ico-sun{display:none}
:root[data-theme="light"] .ico-moon{display:block}

@media (max-width:760px){
  .nav{gap:16px}
  .nav a:not(.nav-cta){display:none}
}

/* ---------- hero ---------- */
.hero{position:relative; overflow:hidden; border-bottom:1px solid var(--line)}
.hero-grid{
  position:absolute; inset:0;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px; opacity:.32;
  mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 30%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000 30%,transparent 78%);
  pointer-events:none;
}
.hero-inner{position:relative; padding-block:clamp(64px,11vw,124px) 0}
.hero-title{
  margin:0 0 22px; font-size:clamp(38px,6.4vw,68px); line-height:1.04;
  letter-spacing:-.035em; font-weight:600; max-width:15ch;
}
.hero-lede{margin:0; max-width:60ch; font-size:clamp(16.5px,1.6vw,18.5px); color:var(--text-dim)}
.hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-top:32px}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 24px; border-radius:999px; text-decoration:none;
  font-size:15px; font-weight:500; border:1px solid transparent; transition:.18s;
}
.btn-primary{background:var(--accent); color:#fff}
.btn-primary:hover{filter:brightness(1.1); transform:translateY(-1px)}
.btn-ghost{border-color:var(--line); color:var(--text)}
.btn-ghost:hover{border-color:var(--accent); background:var(--accent-soft)}

.curve-fig{margin:clamp(48px,7vw,84px) 0 0}
.curve-fig svg{display:block; width:100%; height:clamp(110px,16vw,190px)}
.curve-fig .limit{stroke:var(--line); stroke-width:1.5; stroke-dasharray:5 6}
.curve-fig .curve{stroke-width:2.4; stroke-linecap:round}
.curve-fig figcaption{
  margin:14px 0 0; padding-bottom:clamp(40px,6vw,64px);
  font-family:var(--mono); font-size:12px; color:var(--text-faint); letter-spacing:.01em;
}

/* ---------- sections ---------- */
.section{padding-block:clamp(64px,9vw,108px)}
.section-alt{background:var(--bg-alt); border-block:1px solid var(--line)}
.section-title{
  margin:0 0 16px; font-size:clamp(26px,3.6vw,38px); line-height:1.15;
  letter-spacing:-.028em; font-weight:600; max-width:22ch;
}
.section-lede{margin:0 0 44px; max-width:58ch; color:var(--text-dim); font-size:16.5px}

/* cards */
.cards{display:grid; gap:20px; grid-template-columns:repeat(auto-fit,minmax(310px,1fr))}
.card{
  position:relative; background:var(--surface); border:1px solid var(--line);
  border-radius:var(--radius); padding:30px 28px 24px; transition:.2s;
}
.card:hover{border-color:var(--accent-line); transform:translateY(-2px)}
.card-num{
  font-family:var(--mono); font-size:11.5px; color:var(--accent); letter-spacing:.14em;
}
.card h3{margin:12px 0 12px; font-size:19.5px; line-height:1.3; letter-spacing:-.015em; font-weight:600}
.card p{margin:0; color:var(--text-dim); font-size:15.3px}
.tags{display:flex; flex-wrap:wrap; gap:7px; list-style:none; margin:20px 0 0; padding:0}
.tags li{
  font-family:var(--mono); font-size:11px; letter-spacing:.04em;
  color:var(--text-faint); border:1px solid var(--line); border-radius:999px; padding:4px 10px;
}

/* steps */
.steps{list-style:none; margin:0; padding:0; display:grid; gap:0}
.step{display:flex; gap:24px; padding:28px 0; border-top:1px solid var(--line)}
.step:last-child{border-bottom:1px solid var(--line)}
.step-n{
  flex:none; width:38px;height:38px; border-radius:50%;
  display:grid;place-items:center; font-family:var(--mono); font-size:13px;
  color:var(--accent); border:1px solid var(--accent-line); background:var(--accent-soft);
}
.step h3{margin:6px 0 10px; font-size:20px; letter-spacing:-.015em; font-weight:600}
.step p{margin:0; color:var(--text-dim); max-width:66ch; font-size:15.4px}
.step-out{margin-top:12px!important; font-family:var(--mono); font-size:12px; color:var(--text-faint)}
.step-out span{color:var(--accent); letter-spacing:.1em; text-transform:uppercase; margin-right:8px}
@media (max-width:560px){ .step{gap:16px} }

/* principles */
.principles{display:grid; gap:1px; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); background:var(--line); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden}
.principle{background:var(--bg); padding:28px 26px}
.principle h3{margin:0 0 10px; font-size:17px; letter-spacing:-.012em; font-weight:600; line-height:1.35}
.principle p{margin:0; color:var(--text-dim); font-size:14.8px}

/* notes */
.notes{list-style:none; margin:0; padding:0; display:grid; gap:14px}
.notes a{
  display:block; text-decoration:none; background:var(--surface);
  border:1px solid var(--line); border-radius:var(--radius); padding:26px 28px; transition:.2s;
}
.notes a:hover{border-color:var(--accent-line); transform:translateY(-2px)}
.note-meta{font-family:var(--mono); font-size:11px; letter-spacing:.14em; text-transform:uppercase; color:var(--accent)}
.notes h3{margin:11px 0 9px; font-size:19px; letter-spacing:-.018em; font-weight:600; line-height:1.3}
.notes p{margin:0 0 14px; color:var(--text-dim); font-size:15.2px; max-width:70ch}
.note-state{font-family:var(--mono); font-size:11.5px; color:var(--text-faint); border:1px solid var(--line); border-radius:999px; padding:3px 10px}

/* contact */
.contact-inner{display:grid; gap:40px; grid-template-columns:1.5fr 1fr; align-items:start}
@media (max-width:820px){ .contact-inner{grid-template-columns:1fr} }
.mail{
  display:inline-block; margin-top:8px; font-size:clamp(20px,2.6vw,26px); font-weight:600;
  letter-spacing:-.02em; color:var(--accent); text-decoration:none;
  border-bottom:1px solid var(--accent-line); padding-bottom:3px;
}
.mail:hover{border-bottom-color:var(--accent)}
.contact-card{background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:28px 26px}
.contact-card h3{margin:0 0 14px; font-size:15px; font-family:var(--mono); font-weight:500; letter-spacing:.04em; color:var(--text)}
.contact-card ul{margin:0; padding-left:18px; color:var(--text-dim); font-size:15px}
.contact-card li{margin-bottom:9px}
.contact-card li:last-child{margin-bottom:0}

/* foot */
.site-foot{border-top:1px solid var(--line); background:var(--bg-alt); padding-block:36px}
.foot-inner{display:flex; flex-wrap:wrap; gap:14px 32px; align-items:center}
.foot-brand{display:flex; align-items:center; gap:9px; font-weight:600}
.foot-note{margin:0; color:var(--text-dim); font-size:14px}
.foot-copy{margin:0 0 0 auto; color:var(--text-faint); font-size:13px; font-family:var(--mono)}
@media (max-width:640px){ .foot-copy{margin-left:0} }

/* reveal */
.reveal{opacity:0; transform:translateY(14px)}
.reveal.in{opacity:1; transform:none; transition:opacity .6s ease, transform .6s cubic-bezier(.2,.7,.3,1)}
@media (prefers-reduced-motion:reduce){ .reveal{opacity:1; transform:none} }
:root{--text:#E8ECF1;--text-dim:#9AA5B4;--text-faint:#6B7687}
:root[data-theme="light"]{--text:#14181D;--text-dim:#565F6B;--text-faint:#7A838F}
:root{--text:#E8ECF1;--text-dim:#9AA5B4;--text-faint:#6B7687}
:root[data-theme="light"]{--text:#14181D;--text-dim:#565F6B;--text-faint:#7A838F}