/* aievents.in — plotted, not painted. Tokens mirror brand/BRAND.md */
:root{
  --paper:#F3F1EC; --paper-2:#EAE7DF; --ink:#0E0E0C; --ink-2:#3A3A36; --muted:#77756E; --rule:#D9D6CE; --signal:#FF4D00;
  --sans:"Geist",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --serif:"Instrument Serif",Georgia,serif;
  --mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --wrap:1240px; --gut:clamp(16px,4vw,40px); --r:2px;
  --ease:cubic-bezier(.2,.7,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.55 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
img,svg,canvas{display:block;max-width:100%}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:3px}
button,input,select,textarea{font:inherit;color:inherit}
::selection{background:var(--ink);color:var(--paper)}
:focus-visible{outline:2px solid var(--signal);outline-offset:3px}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--paper);padding:8px 12px;z-index:99}
.skip:focus{left:8px}

/* graph paper: hairline SVG pattern, no gradients */
.grid-bg{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='32' height='32'%3E%3Cpath d='M32 0H0V32' fill='none' stroke='%23D9D6CE' stroke-width='.6'/%3E%3C/svg%3E")}
.dark .grid-bg,.grid-bg.dark{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='32' height='32'%3E%3Cpath d='M32 0H0V32' fill='none' stroke='%23232320' stroke-width='.6'/%3E%3C/svg%3E")}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--gut)}
.mono{font-family:var(--mono);font-size:.78rem;letter-spacing:.02em;text-transform:uppercase}
.muted{color:var(--muted)}
.signal{color:var(--signal)}
em.s,.serif{font-family:var(--serif);font-style:italic;font-weight:400;letter-spacing:0}

/* ---------- header ---------- */
.hdr{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:1px solid var(--rule)}
.hdr .wrap{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:600;letter-spacing:-.03em;font-size:20px}
.brand svg{width:30px;height:30px}
.brand small{font:400 13px var(--mono);color:var(--signal);letter-spacing:0;margin-left:-6px}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{text-decoration:none;font-size:15px;padding:8px 12px;border-radius:var(--r);color:var(--ink-2)}
.nav a:hover{color:var(--ink);background:var(--paper-2)}
.nav a[aria-current=page]{color:var(--ink)}
.nav .btn{margin-left:8px}
.menu-btn{display:none;margin-left:auto;background:none;border:1px solid var(--ink);height:40px;width:44px;border-radius:var(--r);cursor:pointer}
.menu-btn span{display:block;height:1.5px;background:var(--ink);margin:5px 10px;transition:transform .2s var(--ease)}
@media (max-width:860px){
  .menu-btn{display:block}
  .nav{position:fixed;inset:64px 0 auto 0;flex-direction:column;align-items:stretch;background:var(--paper);border-bottom:1px solid var(--ink);padding:12px var(--gut) 20px;gap:0;transform:translateY(-120%);transition:transform .25s var(--ease);margin:0}
  .nav.open{transform:none}
  .nav a{padding:14px 4px;border-bottom:1px solid var(--rule);font-size:18px}
  .nav .btn{margin:16px 0 0;justify-content:center}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;height:44px;padding:0 18px;border:1px solid var(--ink);border-radius:var(--r);background:var(--ink);color:var(--paper)!important;text-decoration:none;font-weight:500;font-size:15px;cursor:pointer;transition:transform .15s var(--ease),background .15s}
.btn:hover{background:var(--signal);border-color:var(--signal)}
.btn:active{transform:translateY(1px)}
.btn.ghost{background:transparent;color:var(--ink)!important}
.btn.ghost:hover{background:var(--ink);color:var(--paper)!important;border-color:var(--ink)}
.btn.lg{height:56px;padding:0 26px;font-size:17px}
.btn .arr{font-family:var(--mono);transition:transform .2s var(--ease)}
.btn:hover .arr{transform:translateX(4px)}
.btn[disabled]{opacity:.5;pointer-events:none}

/* ---------- hero ---------- */
.hero{position:relative;border-bottom:1px solid var(--ink);overflow:hidden}
.hero canvas{position:absolute;inset:0;width:100%;height:100%}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.25fr .85fr;gap:clamp(32px,5vw,72px);align-items:center;min-height:calc(100svh - 64px);padding-top:clamp(40px,6vw,72px);padding-bottom:clamp(40px,6vw,72px);pointer-events:none}
.hero .wrap>*{pointer-events:auto}
.kicker{display:inline-flex;align-items:center;gap:10px;border:1px solid var(--ink);padding:6px 10px;background:var(--paper);border-radius:var(--r)}
.live{width:8px;height:8px;border-radius:50%;background:var(--signal);animation:pulse 1.6s infinite}
@keyframes pulse{50%{opacity:.25}}
h1,.h1{font-weight:600;letter-spacing:-.045em;line-height:.95;font-size:clamp(44px,6.6vw,96px);margin:24px 0 24px;text-wrap:balance}
h1 em.s{font-size:1.04em;letter-spacing:-.02em}
.lede{font-size:clamp(18px,1.6vw,21px);max-width:34ch;color:var(--ink-2);margin:0 0 32px;background:var(--paper)}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* mobile: static problem row replaces the animated network */
.probs{display:none;list-style:none;padding:0;margin:-12px 0 28px;flex-wrap:wrap;gap:10px 16px}
.probs li{display:flex;align-items:center;font:400 11px var(--mono);text-transform:uppercase;letter-spacing:.03em;color:var(--ink-2)}
.probs li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--ink);margin-right:6px}
.probs li:first-child::before{background:var(--signal)}
@media (max-width:760px){.hero canvas{display:none}.probs{display:flex}}

/* ticket card */
.ticket{align-self:center;background:var(--paper);border:1px solid var(--ink);position:relative}
.ticket::before,.ticket::after{content:"";position:absolute;width:18px;height:18px;border:1px solid var(--ink);border-radius:50%;background:var(--paper);top:calc(58% - 9px)}
.ticket::before{left:-10px;clip-path:inset(0 0 0 50%)}
.ticket::after{right:-10px;clip-path:inset(0 50% 0 0)}
.ticket header{display:flex;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--ink)}
.ticket .t-body{padding:20px 18px}
.ticket h2{font-size:30px;letter-spacing:-.03em;line-height:1;margin:0 0 4px;font-weight:600}
.ticket dl{display:grid;grid-template-columns:auto 1fr;gap:8px 16px;margin:18px 0 0;font-size:15px}
.ticket dt{font:400 12px var(--mono);text-transform:uppercase;color:var(--muted);padding-top:3px}
.ticket dd{margin:0}
.ticket .t-foot{border-top:1px dashed var(--ink);padding:16px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.price{font:500 28px var(--mono);letter-spacing:-.04em}
.seats{display:flex;gap:3px;margin-top:10px;flex-wrap:wrap}
.seats i{width:7px;height:14px;border:1px solid var(--ink)}
.seats i.f{background:var(--ink)}
@media (max-width:960px){.hero .wrap{grid-template-columns:1fr;min-height:0}.ticket{max-width:520px}}

/* ---------- marquee ---------- */
.marquee{border-bottom:1px solid var(--ink);overflow:hidden;background:var(--ink);color:var(--paper)}
.marquee .track{display:flex;gap:48px;padding:14px 0;width:max-content;animation:mq 38s linear infinite}
.marquee span{font:400 14px var(--mono);text-transform:uppercase;white-space:nowrap;display:flex;align-items:center;gap:48px}
.marquee span::after{content:"";width:6px;height:6px;background:var(--signal);border-radius:50%}
@keyframes mq{to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
section{position:relative}
.sec{padding:clamp(64px,10vw,128px) 0;border-bottom:1px solid var(--ink)}
.sec-head{display:grid;grid-template-columns:200px 1fr;gap:32px;margin-bottom:56px}
.sec-head .idx{font:400 13px var(--mono);color:var(--muted);text-transform:uppercase;padding-top:14px;border-top:1px solid var(--ink)}
h2,.h2{font-weight:600;letter-spacing:-.04em;line-height:1;font-size:clamp(34px,5.2vw,68px);margin:0;max-width:18ch}
h3{font-weight:600;letter-spacing:-.02em;font-size:22px;line-height:1.15;margin:0 0 8px}
.sec-head p{max-width:52ch;color:var(--ink-2);margin:20px 0 0;font-size:19px}
@media (max-width:760px){.sec-head{grid-template-columns:1fr;gap:12px}}
.dark{background:var(--ink);color:var(--paper)}
.dark .muted,.dark .sec-head .idx{color:#9b9990}
.dark .sec-head .idx{border-color:var(--paper)}
.dark .sec-head p{color:#cfccc3}
.dark .btn{background:var(--paper);color:var(--ink)!important;border-color:var(--paper)}
.dark .btn:hover{background:var(--signal);border-color:var(--signal);color:var(--ink)!important}

/* timeline: a plotted x-axis */
.axis{position:relative;display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--ink)}
.axis .stop{position:relative;padding:28px 20px 0 0}
.axis .stop::before{content:"";position:absolute;top:-6px;left:0;width:1px;height:12px;background:var(--ink)}
.axis .stop .t{font:500 15px var(--mono);display:block;margin-bottom:28px}
.axis .stop svg{width:56px;height:56px;margin-bottom:20px}
.axis .stop p{color:var(--ink-2);font-size:15px;margin:0}
.axis .stop.hot .t{color:var(--signal)}
@media (max-width:900px){.axis{grid-template-columns:1fr;border-top:0;border-left:1px solid var(--ink);margin-left:6px}.axis .stop{padding:0 0 40px 28px}.axis .stop::before{top:6px;left:-6px;width:12px;height:1px}}

/* problem matcher */
.matcher{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--paper)}
.matcher>div{padding:32px}
.matcher>div+div{border-left:1px solid var(--paper)}
.matcher label{display:block;margin-bottom:14px}
.matcher textarea{width:100%;min-height:150px;background:transparent;border:1px solid #4a4a45;border-radius:var(--r);padding:16px;color:var(--paper);font-size:19px;resize:vertical;line-height:1.4}
.matcher textarea::placeholder{color:#6f6d66}
.matcher textarea:focus{outline:none;border-color:var(--signal)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{border:1px solid #4a4a45;background:none;color:#cfccc3;font:400 13px var(--mono);padding:6px 10px;border-radius:99px;cursor:pointer}
.chip:hover{border-color:var(--paper);color:var(--paper)}
.plot{width:100%;aspect-ratio:1.25;border:1px solid #2c2c28}
.table-out{margin-top:20px;min-height:84px}
.table-out .name{font-size:28px;font-weight:600;letter-spacing:-.03em}
@media (max-width:860px){.matcher{grid-template-columns:1fr}.matcher>div+div{border-left:0;border-top:1px solid var(--paper)}}

/* cards / cells grid with hairlines */
.cells{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--ink);border-left:1px solid var(--ink)}
.cell{border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);padding:28px;min-height:240px;display:flex;flex-direction:column;transition:background .2s}
.cell:hover{background:var(--paper-2)}
.cell svg{width:64px;height:64px;margin-bottom:auto}
.cell h3{margin-top:28px}
.cell p{color:var(--ink-2);font-size:15px;margin:0}
.cells.two{grid-template-columns:repeat(2,1fr)}
.cells.four{grid-template-columns:repeat(4,1fr)}
@media (max-width:900px){.cells,.cells.four{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.cells,.cells.two,.cells.four{grid-template-columns:1fr}.cell{min-height:auto}}
.dark .cells,.dark .cell{border-color:#3a3a36}
.dark .cell:hover{background:#171715}
.dark .cell p{color:#cfccc3}

/* numbers */
.stats{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:24px 0 0;border-top:1px solid var(--ink);margin-right:24px}
.stat b{display:block;font:500 clamp(40px,5vw,64px)/1 var(--mono);letter-spacing:-.06em}
.stat span{color:var(--ink-2);font-size:15px}
@media (max-width:760px){.stats{grid-template-columns:1fr 1fr;row-gap:28px}}

/* pricing */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--ink)}
.plan{padding:32px;display:flex;flex-direction:column;gap:16px}
.plan+.plan{border-left:1px solid var(--ink)}
.plan.feat{background:var(--ink);color:var(--paper)}
.plan.feat .btn{background:var(--signal);border-color:var(--signal);color:var(--ink)!important}
.plan .price{font-size:44px}
.plan ul{list-style:none;padding:0;margin:0 0 auto;display:grid;gap:10px;font-size:15px}
.plan li{display:grid;grid-template-columns:18px 1fr;gap:10px}
.plan li::before{content:"";width:10px;height:1px;background:currentColor;margin-top:11px}
@media (max-width:900px){.plans{grid-template-columns:1fr}.plan+.plan{border-left:0;border-top:1px solid var(--ink)}}

/* faq */
.faq details{border-top:1px solid var(--ink)}
.faq details:last-child{border-bottom:1px solid var(--ink)}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:24px;padding:22px 0;font-size:20px;font-weight:500;letter-spacing:-.01em}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font:300 28px/1 var(--mono);transition:transform .2s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:0 0 24px;max-width:70ch;color:var(--ink-2)}

/* forms */
.form{display:grid;grid-template-columns:1fr 1fr;gap:18px 20px}
.form .full{grid-column:1/-1}
.field label{display:block;font:400 12px var(--mono);text-transform:uppercase;letter-spacing:.04em;margin-bottom:8px;color:var(--ink-2)}
.field input,.field select,.field textarea{width:100%;height:50px;border:1px solid var(--ink);background:var(--paper);border-radius:var(--r);padding:0 14px;font-size:16px}
.field textarea{height:auto;min-height:110px;padding:12px 14px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--signal);box-shadow:0 0 0 1px var(--signal)}
.field .hint{font-size:13px;color:var(--muted);margin-top:6px}
.hp{position:absolute;left:-9999px}
.form-msg{grid-column:1/-1;font-size:15px;min-height:22px}
.form-msg.err{color:#C21E00}
.form-msg.ok{color:var(--ink)}
@media (max-width:640px){.form{grid-template-columns:1fr}}

/* modal (register) */
dialog.sheet{border:1px solid var(--ink);border-radius:var(--r);padding:0;max-width:720px;width:calc(100% - 24px);background:var(--paper);color:var(--ink)}
dialog.sheet::backdrop{background:rgba(14,14,12,.6)}
.sheet-head{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;border-bottom:1px solid var(--ink)}
.sheet-body{padding:24px}
.x{background:none;border:1px solid var(--ink);width:36px;height:36px;border-radius:var(--r);cursor:pointer;font:400 18px var(--mono)}
.steps{display:flex;gap:6px;margin-bottom:20px}
.steps i{flex:1;height:3px;background:var(--rule)}
.steps i.on{background:var(--ink)}
.done-plot{width:120px;height:120px;margin:8px 0 16px}

/* prose (legal, long pages) */
.prose{max-width:72ch}
.prose h2{font-size:30px;margin:48px 0 12px}
.prose p,.prose li{color:var(--ink-2)}
.page-hero{padding:clamp(56px,9vw,104px) 0 clamp(40px,6vw,64px);border-bottom:1px solid var(--ink)}
.page-hero h1{font-size:clamp(42px,7vw,92px)}
.crumbs{font:400 13px var(--mono);text-transform:uppercase;color:var(--muted)}
.crumbs a{text-decoration:none}

/* directory list */
.list{border-top:1px solid var(--ink)}
.row{display:grid;grid-template-columns:120px 1fr auto;gap:24px;align-items:center;padding:22px 0;border-bottom:1px solid var(--ink);text-decoration:none}
.row:hover h3{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
.row .d{font:500 15px var(--mono)}
.row .tag{font:400 12px var(--mono);text-transform:uppercase;border:1px solid var(--ink);padding:4px 8px;border-radius:99px}
.row .tag.ours{background:var(--signal);border-color:var(--signal)}
@media (max-width:640px){.row{grid-template-columns:1fr}}

/* footer */
.ftr{background:var(--ink);color:var(--paper);padding:72px 0 32px}
.ftr .big{font-weight:600;letter-spacing:-.05em;font-size:clamp(56px,13vw,200px);line-height:.85;margin:0 0 56px}
.ftr .big span{color:var(--signal)}
.ftr .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;border-top:1px solid #3a3a36;padding-top:32px}
.ftr a{text-decoration:none;color:#cfccc3;display:block;padding:4px 0;font-size:15px}
.ftr a:hover{color:var(--paper)}
.ftr h4{font:400 12px var(--mono);text-transform:uppercase;color:#9b9990;margin:0 0 12px;font-weight:400}
.ftr .legal{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:56px;font:400 12px var(--mono);color:#9b9990;text-transform:uppercase}
@media (max-width:760px){.ftr .cols{grid-template-columns:1fr 1fr}}

/* reveal (lines draw) */
.draw path,.draw line,.draw circle,.draw polyline,.draw rect{stroke-dasharray:var(--len,400);stroke-dashoffset:var(--len,400);transition:stroke-dashoffset 1.2s var(--ease)}
.draw.in path,.draw.in line,.draw.in circle,.draw.in polyline,.draw.in rect{stroke-dashoffset:0}
.rise{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.rise.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .rise{opacity:1;transform:none}
  .draw path,.draw line,.draw circle,.draw polyline,.draw rect{stroke-dashoffset:0}
}

/* layout helpers + dark form contrast */
.split{display:grid;grid-template-columns:1.3fr .9fr;gap:48px;align-items:end}
.split.c{grid-template-columns:1fr 1.4fr;align-items:start}
@media (max-width:900px){.split,.split.c{grid-template-columns:1fr}}
.dark .field label{color:#cfccc3}
.dark .form-msg.ok{color:var(--paper)}
.dark .form-msg.err{color:#FF8A5C}
.dark a:not(.btn){color:var(--paper)}