@property --mono{syntax:"<number>";inherits:true;initial-value:0}
@property --casl{syntax:"<number>";inherits:true;initial-value:0}
@property --wght{syntax:"<number>";inherits:true;initial-value:400}
@property --slnt{syntax:"<number>";inherits:true;initial-value:0}
:root{--ground:#eef2f4;--surface:#e3e9ec;--surface-2:#d8e0e4;--ink:#0f1417;--ink-mute:#51606a;--hairline:#c6d0d6;--accent:#0b7285;--on-accent:#eef2f4;--sys-1:#0b7285;--sys-2:#2b8a3e;--sys-3:#c26100;--sys-4:#c2255c;--sys-5:#3b5bdb;--sans:"Host Grotesk", ui-sans-serif, system-ui, sans-serif;--font-mono:"Recursive", ui-monospace, monospace;--font-brand:"Recursive", ui-sans-serif, system-ui, sans-serif;--container:1320px;--gutter:32px;--section-y:clamp(96px, 12vw, 176px);--radius:14px;--nav-h:68px;--ease:cubic-bezier(.16, 1, .3, 1);--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--ground:#0b0f12;--surface:#121a1f;--surface-2:#18232a;--ink:#e6ecef;--ink-mute:#8fa0aa;--hairline:#22303a;--accent:#7dd3e8;--on-accent:#0b0f12;--sys-1:#7dd3e8;--sys-2:#63e6a6;--sys-3:#ffb547;--sys-4:#ff7a93;--sys-5:#8fa3ff;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}
}
:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--ground:#0b0f12;--surface:#121a1f;--surface-2:#18232a;--ink:#e6ecef;--ink-mute:#8fa0aa;--hairline:#22303a;--accent:#7dd3e8;--on-accent:#0b0f12;--sys-1:#7dd3e8;--sys-2:#63e6a6;--sys-3:#ffb547;--sys-4:#ff7a93;--sys-5:#8fa3ff}
*,:before,:after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%}
body{background:var(--ground);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;margin:0;font-size:18px;font-weight:400;line-height:1.55}
h1,h2,h3,p,ol,dl,dd,fieldset{margin:0;padding:0}
ol{list-style:none}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}
.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}
.skip{z-index:30;background:var(--accent);color:var(--on-accent);border-radius:999px;padding:10px 16px;font-weight:560;text-decoration:none;position:fixed;top:12px;left:12px;transform:translateY(-160%)}
.skip:focus{transform:none}
.display-xl{letter-spacing:-.035em;text-wrap:balance;font-size:clamp(44px,6.4vw,96px);font-weight:560;line-height:.98}
.display-lg{letter-spacing:-.03em;text-wrap:balance;font-size:clamp(34px,4.4vw,64px);font-weight:560;line-height:1.02}
h3{letter-spacing:-.015em;font-size:clamp(22px,2vw,28px);font-weight:560;line-height:1.15}
.btn{height:48px;font:560 16px/1 var(--sans);white-space:nowrap;transition:background-color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);border:1px solid #0000;border-radius:999px;justify-content:center;align-items:center;gap:8px;padding:0 22px;text-decoration:none;display:inline-flex}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--accent);color:var(--on-accent)}
.btn-primary:hover{background:color-mix(in oklab, var(--accent) 86%, var(--ink))}
.btn-ghost{border-color:color-mix(in oklab, var(--ink) 30%, transparent);background:color-mix(in oklab, var(--ground) 45%, transparent);color:var(--ink);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.btn-ghost:hover{border-color:var(--ink)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-lg{height:56px;padding:0 28px;font-size:17px}
.stage{z-index:0;background:var(--ground);position:fixed;inset:0}
.stage canvas{width:100%;height:100%;display:block}
.stage.still{background:var(--ground) url(/assets/heytuan/poster-light.webp) 62% 50% / cover no-repeat}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .stage.still{background-image:url(/assets/heytuan/poster-dark.webp)}
}
:root[data-theme=dark] .stage.still{background-image:url(/assets/heytuan/poster-dark.webp)}
.nav{z-index:20;height:calc(var(--nav-h) + env(safe-area-inset-top,0px));padding-top:env(safe-area-inset-top,0px);padding-inline:max(var(--gutter), calc((100% - var(--container)) / 2));background:color-mix(in oklab, var(--ground) 70%, transparent);-webkit-backdrop-filter:blur(14px)saturate(140%);backdrop-filter:blur(14px)saturate(140%);border-bottom:1px solid color-mix(in oklab, var(--hairline) 60%, transparent);grid-template-columns:auto 1fr auto;align-items:center;gap:32px;display:grid;position:fixed;inset:0 0 auto}
.wordmark{font-family:var(--font-brand);font-variation-settings:"MONO" 0, "CASL" 0, "wght" 800;letter-spacing:-.03em;align-items:baseline;gap:12px;font-size:19px;text-decoration:none;display:inline-flex}
.wordmark span{font:400 12px/1 var(--font-mono);font-variation-settings:"MONO" 1, "CASL" 0;letter-spacing:0;color:var(--ink-mute)}
.nav nav{justify-content:center;gap:32px;display:flex}
.nav nav a{color:var(--ink-mute);transition:color .2s var(--ease);font-size:15px;text-decoration:none}
.nav nav a:hover{color:var(--ink)}
main{z-index:1;position:relative}
.hero,.story-pin{padding-inline:max(var(--gutter), calc((100% - var(--container)) / 2))}
.hero{min-height:100dvh;padding-top:calc(var(--nav-h) + 28px);flex-direction:column;justify-content:flex-end;align-items:flex-start;padding-bottom:clamp(40px,7vh,88px);display:flex;position:relative}
.brand{font-family:var(--font-brand);letter-spacing:-.045em;white-space:nowrap;margin-left:-.04em;font-size:clamp(64px,12vw,184px);font-weight:400;line-height:.9}
.brand-line{display:block}
.brand .char{--mono:0;--casl:0;--wght:820;--slnt:0;font-variation-settings:"MONO" var(--mono), "CASL" var(--casl), "wght" var(--wght), "slnt" var(--slnt);color:color-mix(in oklab, var(--ink), var(--c,var(--accent)) calc(var(--mono) * 100%));display:inline-block}
.brand .char.space{width:.26em}
.js .brand:not([data-state]){font-variation-settings:"MONO" 1, "CASL" 0, "wght" 320}
.brand[data-state=intro] .char{--mono:1;--casl:0;--wght:320}
.brand[data-state=settling] .char{transition:--mono .9s var(--ease), --casl .9s var(--ease), --wght .9s var(--ease);transition-delay:calc(var(--i) * 70ms + .3s)}
.brand[data-state=live] .char{transition:--mono .42s var(--ease), --casl .42s var(--ease), --wght .42s var(--ease), --slnt .42s var(--ease)}
.tagline{letter-spacing:-.025em;text-wrap:balance;max-width:22ch;font-size:clamp(26px,2.8vw,42px);font-weight:560;line-height:1.08}
.hero:before,.story-pin:before{content:"";z-index:-1;pointer-events:none;background:linear-gradient(to top, color-mix(in oklab, var(--ground) 92%, transparent) 0%, transparent 52%), linear-gradient(to right, color-mix(in oklab, var(--ground) 70%, transparent) 0%, transparent 58%);position:absolute;inset:0}
.hero-copy{flex-direction:column;gap:22px;max-width:900px;display:flex}
.hero-copy .actions{margin-top:6px}
.lede{max-width:36ch;color:var(--ink-mute);font-size:clamp(18px,1.5vw,21px)}
.actions{flex-wrap:wrap;gap:12px;display:flex}
.story{height:500vh;position:relative}
.station-anchor{top:calc(var(--k) * 100vh);position:absolute;left:0}
.story-pin{isolation:isolate;height:100dvh;padding-top:var(--nav-h);align-items:flex-end;padding-bottom:clamp(48px,9vh,104px);display:flex;position:sticky;top:0}
.stations{max-width:640px;display:grid}
.station{opacity:0;visibility:hidden;transition:opacity .5s var(--ease), transform .7s var(--ease), visibility 0s linear .5s;flex-direction:column;grid-area:1/1;gap:20px;display:flex;transform:translateY(20px)}
.station p{max-width:44ch;color:var(--ink-mute)}
.story[data-station="-1"] .station[data-k="0"],.story[data-station="0"] .station[data-k="0"],.story[data-station="1"] .station[data-k="1"],.story[data-station="2"] .station[data-k="2"],.story[data-station="3"] .station[data-k="3"]{opacity:1;visibility:visible;transition-delay:80ms,80ms,0s;transform:none}
.rail{top:50%;right:max(var(--gutter), calc((100% - var(--container)) / 2));border-radius:var(--radius);border:1px solid color-mix(in oklab, var(--hairline) 70%, transparent);background:color-mix(in oklab, var(--ground) 78%, transparent);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);flex-direction:column;gap:18px;padding:20px 22px 20px 18px;display:flex;position:absolute;transform:translateY(-50%)}
.rail a{font:400 12px/1.2 var(--font-mono);font-variation-settings:"MONO" 1, "CASL" 0;color:var(--ink-mute);transition:color .3s var(--ease);padding-left:28px;text-decoration:none;position:relative}
.rail a:before{content:"";transform-origin:0;width:16px;height:1px;transition:transform .4s var(--ease);background:currentColor;position:absolute;top:50%;left:0;transform:scaleX(.5)}
.rail a:hover,.story[data-station="0"] .rail a[data-k="0"],.story[data-station="1"] .rail a[data-k="1"],.story[data-station="2"] .rail a[data-k="2"],.story[data-station="3"] .rail a[data-k="3"]{color:var(--ink)}
.rail a[data-k="0"],.station[data-k="0"]{--station:var(--sys-3)}
.rail a[data-k="1"],.station[data-k="1"]{--station:var(--sys-1)}
.rail a[data-k="2"],.station[data-k="2"]{--station:var(--sys-2)}
.rail a[data-k="3"],.station[data-k="3"]{--station:var(--sys-4)}
.story[data-station="0"] .rail a[data-k="0"]:before,.story[data-station="1"] .rail a[data-k="1"]:before,.story[data-station="2"] .rail a[data-k="2"]:before,.story[data-station="3"] .rail a[data-k="3"]:before{background:var(--station);height:2px;transform:scaleX(1)}
.station h3:before{content:"";background:var(--station);border-radius:2px;width:56px;height:3px;margin-bottom:24px;display:block}
.services,.examples,.process,.contact,.footer{background:var(--ground);padding-inline:max(var(--gutter), calc((100% - var(--container)) / 2));position:relative}
.services,.examples,.process,.contact{padding-block:var(--section-y) 0}
.contact{padding-bottom:var(--section-y)}
.services{border-top:1px solid var(--hairline)}
.bento{grid-template-rows:auto auto;grid-template-columns:1.1fr 1fr 1fr;gap:16px;margin-top:56px;display:grid}
.cell{--tint:var(--accent);border-radius:var(--radius);background:radial-gradient(120% 80% at 100% 100%, color-mix(in oklab, var(--tint) 14%, transparent), transparent 62%), var(--surface);flex-direction:column;display:flex;overflow:hidden}
.cell-flow{--tint:var(--sys-2)}
.cell-assist{--tint:var(--sys-4)}
.cell-docs{--tint:var(--sys-3)}
.cell-report{--tint:var(--sys-5)}
.cell img{object-fit:cover;background:var(--surface-2);width:100%}
.cell-copy{flex-direction:column;gap:12px;padding:28px;display:flex}
.cell-copy p{color:var(--ink-mute);font-size:16px}
.cell-flow{grid-row:1/span 2}
.cell-flow img{flex:1;min-height:360px}
.cell-assist{background:radial-gradient(circle at 1px 1px, color-mix(in oklab, var(--tint) 20%, transparent) 1px, transparent 1.5px) 0 0 / 18px 18px, radial-gradient(90% 70% at 20% 10%, color-mix(in oklab, var(--tint) 22%, transparent), transparent 70%), var(--surface-2);justify-content:flex-end;min-height:340px}
.cell-docs img{aspect-ratio:16/10}
.cell-report{flex-direction:row;grid-column:2/span 2;align-items:stretch}
.cell-report .cell-copy{flex:1;justify-content:flex-end}
.cell-report img{object-position:0% 50%;width:50%;min-height:240px}
.examples-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:24px 48px;display:flex}
.examples-head>div{flex-direction:column;gap:16px;display:flex}
.examples-note{font:400 13px/1.4 var(--font-mono);font-variation-settings:"MONO" 1, "CASL" 0;color:var(--ink-mute)}
.toggle{background:var(--surface);border:0;border-radius:999px;grid-template-columns:1fr 1fr;padding:4px;display:grid;position:relative}
.toggle input{opacity:0;pointer-events:none;position:absolute}
.toggle label{z-index:1;font:500 13px/1 var(--font-mono);font-variation-settings:"MONO" 1, "CASL" 0;text-align:center;color:var(--ink-mute);cursor:pointer;transition:color .3s var(--ease);border-radius:999px;padding:11px 22px;position:relative}
.toggle input:checked+label{color:var(--on-accent)}
.toggle input:focus-visible+label{outline:2px solid var(--accent);outline-offset:2px}
.toggle:before{content:"";background:var(--accent);width:calc(50% - 4px);transition:transform .45s var(--ease);border-radius:999px;position:absolute;inset:4px auto 4px 4px}
.toggle:has(#mode-auto:checked):before{transform:translate(100%)}
.chores{grid-template-columns:1fr 1fr;gap:56px 64px;margin-top:64px;display:grid}
.chore{--tint:var(--accent);border-top:2px solid var(--hairline);transition:border-color .5s var(--ease);grid-template-rows:auto 1fr;gap:16px;padding-top:24px;display:grid}
.chore:first-child{--tint:var(--sys-3)}
.chore:nth-child(2){--tint:var(--sys-1)}
.chore:nth-child(3){--tint:var(--sys-5)}
.chore:nth-child(4){--tint:var(--sys-4)}
.examples:has(#mode-auto:checked) .chore{border-top-color:var(--tint)}
.chore dt{letter-spacing:-.015em;font-size:clamp(22px,2vw,28px);font-weight:560}
.chore dd{max-width:46ch;transition:opacity .4s var(--ease), transform .5s var(--ease), visibility 0s linear .4s;grid-area:2/1}
.chore .today{color:var(--ink-mute)}
.chore .auto{opacity:0;visibility:hidden;transform:translateY(10px)}
.examples:has(#mode-auto:checked) .today{opacity:0;visibility:hidden;transform:translateY(-10px)}
.examples:has(#mode-auto:checked) .auto{opacity:1;visibility:visible;transition-delay:.1s,.1s,0s;transform:none}
.track{grid-template-columns:repeat(4,1fr);gap:40px;margin-top:64px;padding-top:44px;display:grid;position:relative}
.track:before,.track:after{content:"";background:var(--hairline);height:1px;position:absolute;top:5px;left:0;right:0}
.track:after{background:linear-gradient(90deg, var(--sys-3), var(--sys-1) 36%, var(--sys-2) 64%, var(--sys-4));transform-origin:0;height:2px;transform:scaleX(var(--drawn,1));transition:transform 1.4s var(--ease);top:4.5px}
.js .track:not(.in){--drawn:0}
.track li{flex-direction:column;gap:12px;display:flex;position:relative}
.track li:before{content:"";border:2px solid var(--node,var(--accent));background:var(--ground);border-radius:50%;width:11px;height:11px;position:absolute;top:-44px;left:0}
.track li:first-child{--node:var(--sys-3)}
.track li:nth-child(2){--node:var(--sys-1)}
.track li:nth-child(3){--node:var(--sys-2)}
.track li:nth-child(4){--node:var(--sys-4)}
.track p{color:var(--ink-mute);font-size:16px}
.contact{flex-direction:column;gap:48px;display:flex}
.contact-visual{aspect-ratio:8/3;object-fit:cover;border-radius:var(--radius);background:#0b0f12;width:100%}
.contact-row{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:32px 48px;display:flex}
.contact-copy{flex-direction:column;gap:18px;max-width:760px;display:flex}
.contact-copy p{color:var(--ink-mute)}
.footer nav{flex-wrap:wrap;gap:8px 24px;display:flex}
.footer a{color:inherit;text-underline-offset:3px}
.footer a:hover{color:var(--ink)}
.footer{z-index:1;border-top:1px solid var(--hairline);font:400 12px/1.5 var(--font-mono);font-variation-settings:"MONO" 1, "CASL" 0;color:var(--ink-mute);flex-wrap:wrap;justify-content:space-between;gap:16px;padding-block:28px 40px;display:flex}
.js .reveal{transition:transform .9s var(--ease);transform:translateY(24px)}
.js .reveal.in{transform:none}
.bento .reveal:nth-child(2){transition-delay:80ms}
.bento .reveal:nth-child(3){transition-delay:.16s}
.bento .reveal:nth-child(4){transition-delay:.24s}
.legal{z-index:1;padding:calc(var(--nav-h) + clamp(48px, 8vw, 96px)) max(var(--gutter), calc((100% - var(--container)) / 2)) var(--section-y);position:relative}
.legal article{flex-direction:column;gap:18px;max-width:68ch;display:flex}
.legal h1{margin-bottom:8px}
.legal .updated{font:400 13px/1.4 var(--font-mono);font-variation-settings:"MONO" 1, "CASL" 0;color:var(--ink-mute)}
.legal h2{scroll-margin-top:calc(var(--nav-h) + 24px);letter-spacing:-.015em;margin-top:28px;font-size:clamp(22px,2vw,26px);font-weight:560}
.legal p,.legal li{color:var(--ink-mute)}
.legal ul{flex-direction:column;gap:8px;margin:0;padding-left:1.2em;display:flex}
.legal a{color:var(--ink);-webkit-text-decoration-color:var(--accent);text-decoration-color:var(--accent);text-underline-offset:3px}
.legal strong{color:var(--ink);font-weight:560}
@media (max-width:719px){:root{--gutter:16px;--nav-h:60px}
.nav nav{display:none}
.nav{grid-template-columns:1fr auto}
.wordmark span{display:none}
.hero:before,.story-pin:before{background:linear-gradient(to top, color-mix(in oklab, var(--ground) 94%, transparent) 0%, color-mix(in oklab, var(--ground) 70%, transparent) 38%, transparent 68%)}
.actions .btn{flex:auto}
.rail{top:calc(var(--nav-h) + 16px);right:auto;left:var(--gutter);flex-direction:row;gap:16px;transform:none}
.rail a{padding-top:10px;padding-left:0}
.rail a:before{top:0}
.bento{grid-template-columns:1fr;margin-top:40px}
.cell-flow{grid-row:auto}
.cell-flow img{aspect-ratio:4/3;min-height:0}
.cell-assist{min-height:240px}
.cell-report{flex-direction:column-reverse;grid-column:auto}
.cell-report img{aspect-ratio:16/9;width:100%;min-height:0}
.cell-copy{padding:22px}
.chores{grid-template-columns:1fr;gap:40px;margin-top:40px}
.track{grid-template-columns:1fr;gap:36px;margin-top:40px;padding-top:0;padding-left:36px}
.track:before,.track:after{width:1px;height:auto;inset:0 auto 0 5px}
.track:after{background:linear-gradient(180deg, var(--sys-3), var(--sys-1) 36%, var(--sys-2) 64%, var(--sys-4));transform-origin:top;width:2px;transform:scaleY(var(--drawn,1));left:4.5px}
.track li:before{top:6px;left:-36px}
.contact{gap:32px}
.contact .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;transition-delay:0s!important}
.js .reveal{transform:none}
}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}
}