@font-face{font-family:Pretendard;src:url('./assets/PretendardVariable.woff2') format('woff2');font-weight:100 900;font-display:swap}
@font-face{font-family:Geist;src:url('./assets/Geist.woff2') format('woff2');font-weight:100 900;font-display:swap}
/* Layers: stage content 0-3; sticky navigation 10. Radii: buttons 8, frames 12.
   The landing has one fixed dark presentation: no light tokens, no theme switch. */
:root{color-scheme:dark;--bg:#08090a;--surface:#111214;--surface-raised:#191a1d;--text:#f0f1f2;--muted:#929498;--soft:#b6b8bd;--line:#26272b;--figure:#4a4c52;--button:#e9eaec;--button-text:#151618;--focus:#abbfff;--logo:invert(1);--nav:rgb(8 9 10 / .94)}
*{box-sizing:border-box}
html{scroll-padding-top:90px}
body{margin:0;background:var(--bg);color:var(--text);font-family:Geist,Pretendard,-apple-system,BlinkMacSystemFont,sans-serif;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none;padding:0;-webkit-tap-highlight-color:transparent}
button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--focus);outline-offset:4px}
img{display:block;max-width:100%;height:auto}
h1,h2,p,figure,ol{margin:0}
h1,h2{font-weight:560;letter-spacing:-.045em;text-wrap:balance;word-break:keep-all}
h2 span{color:var(--muted)}
p{word-break:keep-all;text-wrap:pretty}
.wrap{max-width:1376px;margin-inline:auto;padding-inline:40px}
.skip{position:fixed;left:16px;top:-100px;background:var(--button);color:var(--button-text);padding:12px;z-index:11}.skip:focus{top:12px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}

.header{height:64px;position:sticky;top:0;border-bottom:1px solid var(--line);background:var(--nav);backdrop-filter:blur(14px);z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;height:100%}
.brand{display:inline-flex;align-items:center;gap:9px;font-size:22px;font-weight:620;letter-spacing:-.055em}
.brand img{filter:var(--logo);width:26px;height:26px}
.nav-links{display:flex;gap:28px;font-size:14px;font-weight:510;color:var(--muted)}
.nav-links a:hover{color:var(--text)}

.button{display:inline-flex;justify-content:center;align-items:center;min-height:46px;padding:0 22px;border-radius:8px;background:var(--button);color:var(--button-text);font-size:14px;font-weight:560;border:1px solid transparent;white-space:nowrap;transition:opacity .2s,transform .2s}
.button:hover{opacity:.88}.button:active{transform:translateY(1px)}
.button.secondary{background:var(--surface);border-color:var(--line);color:var(--text)}
.text-link{font-size:13px;color:var(--soft)}.text-link:hover{color:var(--text)}

/* Hero: identity, one invitation, and the product right under it. */
.hero{padding-top:48px;padding-bottom:96px}
.hero h1{font-size:clamp(40px,3.4vw,52px);line-height:1.24}
.hero-row{display:flex;align-items:flex-end;justify-content:space-between;gap:36px;margin-top:22px}
.hero-row p{font-size:17px;line-height:1.7;color:var(--soft);max-width:640px}

/* Try AIARC: a desktop on the approved wallpaper, with the real browser demo in a window. */
.stage{position:relative;isolation:isolate;overflow:hidden;margin-top:28px;border-radius:12px;display:grid;grid-template-columns:112px minmax(0,1fr);gap:16px;align-items:start;padding:24px 24px 24px 16px;user-select:none;-webkit-user-select:none}
.wallpaper,.wallpaper img{position:absolute;inset:0;width:100%;height:100%;z-index:-1}
.wallpaper img{object-fit:cover;object-position:center 40%}
.desktop{display:grid;gap:14px;justify-items:center}
.desk-item{display:grid;justify-items:center;gap:6px;width:104px;padding:8px 4px;border-radius:8px;color:#fff;font-size:12px;font-weight:520;line-height:1.35;text-align:center;overflow-wrap:anywhere;text-shadow:0 0 3px rgb(0 20 40 / .75),0 1px 2px rgb(0 0 0 / .6)}
button.desk-item{cursor:grab;touch-action:none}
button.desk-item:focus-visible{background:rgb(255 255 255 / .16)}
@media(hover:hover){button.desk-item:hover{background:rgb(255 255 255 / .16)}}
.desk-item.is-lifted{opacity:.45}
.desk-icon{width:48px;height:40px;filter:drop-shadow(0 2px 3px rgb(0 0 0 / .25))}
.folder .back{fill:#d9dde3}.folder .front{fill:#f4f6f8}
.drag-ghost{position:absolute;left:0;top:0;z-index:3;pointer-events:none;opacity:.92}
/* The stage fits one viewport where it can, but the app never drops below ~0.8 scale for it. */
.window{--chrome:78px;justify-self:center;width:100%;max-width:max(1024px,min(1100px,calc((100svh - 64px - var(--chrome)) * 1.6)));border-radius:10px;overflow:hidden;background:#fafbfc;box-shadow:0 0 0 1px rgb(14 30 48 / .16),0 24px 70px rgb(14 36 60 / .38)}
.window-bar{height:30px;display:grid;place-items:center;border-bottom:1px solid #e4e6ea;background:#f1f2f4;color:#6b6f76;font-size:12px;font-weight:540;letter-spacing:.01em}
.window-view{--s:1;position:relative;aspect-ratio:1280/800;overflow:hidden}
.window-poster img{width:100%;height:100%}
.window-view iframe{position:absolute;left:0;top:0;width:1280px;height:800px;border:0;background:#fafbfc;transform:scale(var(--s));transform-origin:0 0;opacity:0;pointer-events:none}
.stage[data-live=ready] iframe{opacity:1;pointer-events:auto}
.cursor{position:absolute;left:0;top:0;z-index:4;width:22px;height:26px;opacity:0;pointer-events:none;will-change:transform}
.cursor svg{display:block;width:22px;height:26px;filter:drop-shadow(0 1px 1.5px rgb(0 0 0 / .4));transition:opacity .18s ease}
.cursor.is-reading svg{opacity:0}
.tour-spotlight{position:absolute;inset:0;z-index:3;overflow:hidden;pointer-events:none;opacity:0;border-radius:inherit}
.tour-spotlight>div{position:absolute;border-radius:8px;box-shadow:0 0 0 200vmax rgb(12 20 30 / .18);outline:1px solid rgb(100 115 132 / .22)}
@media(prefers-reduced-motion:reduce){.cursor svg{transition:none}.tour-spotlight{display:none}}
.cursor path{fill:#16181b;stroke:#fff;stroke-width:1.4;stroke-linejoin:round}
.cursor i{position:absolute;left:-9px;top:-8px;width:24px;height:24px;border-radius:50%;border:2px solid rgb(22 24 27 / .55);opacity:0}
.stage-foot{display:flex;align-items:baseline;justify-content:space-between;gap:24px;margin-top:16px;font-size:12px;line-height:1.7;color:var(--muted)}

/* Sections: one message each. */
.section{padding-block:112px}
.section h2{font-size:34px;line-height:1.35}
.lead{margin-top:18px;font-size:18px;line-height:1.7;letter-spacing:-.02em;color:var(--soft);max-width:560px}
/* Product chapters: the whole app frame (sidebar, work, conversation), shown near its native size. */
.chapter{padding-block:64px}
.product-shot{display:block;margin-top:44px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fafbfc}
.product-shot img{width:100%}

.split{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:56px;align-items:center}
.state-figure{margin:0}
.diagram{display:block;width:100%;height:auto;overflow:visible}
.diagram path{fill:none;stroke:var(--figure);stroke-width:1;stroke-linejoin:round;vector-effect:non-scaling-stroke}
.diagram .face{fill:var(--bg)}
.diagram .current .face{stroke:var(--text)}
.diagram .current .top{fill:var(--surface)}
.diagram .dashed,.diagram .thread,.diagram .plan-old{stroke-dasharray:3 4}
.diagram .plan{stroke:var(--soft)}
.diagram .plan-new{stroke:var(--text);stroke-width:1.6}
.diagram .leader{stroke:var(--line)}.diagram .leader.strong{stroke:var(--figure)}
.diagram .link.strong{stroke:var(--soft)}
.diagram text{fill:var(--muted);font-size:14px;font-family:Geist,Pretendard,sans-serif}
.diagram .mark{fill:var(--text);font-size:12px}.diagram .mark.dim{fill:var(--muted)}
.diagram .label{fill:var(--soft)}.diagram .label.strong{fill:var(--text);font-weight:560}
.diagram .date{fill:var(--muted);font-variant-numeric:tabular-nums}
.state-legend{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}

.statement{max-width:1120px}
.progression{display:flex;flex-wrap:wrap;gap:10px 0;list-style:none;padding:0;margin-top:40px;font-size:14px;color:var(--muted)}
.progression li{display:flex;align-items:baseline;gap:8px}
.progression li+li:before{content:'→';margin:0 16px;color:var(--figure)}
.progression .now{color:var(--text)}
.progression small{font-size:11px;color:var(--muted)}
.expansion{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:0;list-style:none;padding:0;margin-top:64px;border-top:1px solid var(--line)}
.expansion li{display:grid;align-content:start;gap:18px;padding:36px 14px 0;font-size:14px;line-height:1.5;color:var(--soft);word-break:keep-all}

.download{display:grid;grid-template-columns:1fr auto;gap:28px 60px;align-items:center}
.download h2{font-size:36px}
.download-actions{display:grid;gap:12px;min-width:280px;text-align:center}
.download-actions small{font-size:12px;color:var(--muted)}
.scope{grid-column:1 / -1;max-width:860px;font-size:13px;color:var(--muted)}
.scope summary{cursor:pointer;width:max-content}
.scope p{margin-top:14px;line-height:1.9}

.footer{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;padding-block:48px 40px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.footer-links{display:flex;flex-wrap:wrap;gap:24px}
.footer a:hover{color:var(--text)}
.footer-bottom{flex-basis:100%;padding-top:24px;border-top:1px solid var(--line);font-size:12px}

/* Keep the product prominent on standard desktop viewports. */
@media(min-width:1280px) and (max-width:1599px){
  .hero{padding-top:32px}.hero-row{margin-top:16px}
  .stage{margin-top:20px;padding:16px}
  .window{max-width:none}
}
@media(min-width:1600px){.wrap{max-width:1536px;padding-inline:56px}}
/* Desktop items move to a row once the window needs the full width. */
@media(min-width:1024px) and (max-width:1279px){.product-shot{margin-inline:-24px}}
@media(max-width:1279px){.stage{grid-template-columns:1fr;gap:16px;padding:16px 24px 24px}.desktop{display:flex;justify-items:start}.desktop .desk-item{display:flex;align-items:center;gap:10px;width:auto;max-width:260px;text-align:left;padding:4px}.desktop .desk-icon{flex:none;width:36px;height:30px}.window{--chrome:120px}}
/* Narrow: the demo runs at its own mobile size inside a narrow window. */
@media(max-width:939px){.stage{max-width:454px;margin-inline:auto}.window{max-width:390px}.window-view{aspect-ratio:390/720}.window-view iframe{width:390px;height:720px}
  .split{grid-template-columns:1fr;gap:40px}.expansion{grid-template-columns:repeat(3,minmax(0,1fr))}.expansion li:nth-child(n+4){border-top:1px solid var(--line);padding-bottom:28px}}
@media(max-width:760px){
  html{scroll-padding-top:70px}.wrap{padding-inline:20px}.header{height:58px}.brand{font-size:20px}.brand img{width:23px;height:23px}.nav-links{gap:20px;font-size:13px}
  .hero{padding-top:32px;padding-bottom:72px}.hero h1{font-size:32px;line-height:1.32;letter-spacing:-.035em}.hero h1 br,.hero-row p br{display:none}
  .hero-row{flex-direction:column;align-items:stretch;gap:22px}.hero-row p{font-size:16px}
  .stage{margin-top:24px;margin-inline:auto;padding:10px 12px 14px;border-radius:10px}.desk-item{width:102px;padding:6px 2px;font-size:11px}.desk-icon{width:40px;height:34px}
  .stage-foot{flex-direction:column;gap:8px;font-size:11px}
  .section{padding-block:72px}.section h2,.download h2{font-size:27px}.section h2 br{display:none}.lead{font-size:16px}
  .chapter{padding-block:56px}.chapter h2{font-size:25px}.chapter h2 br{display:inline}.product-shot{margin-top:28px;max-width:420px;margin-inline:auto}
  .diagram .label,.diagram .leader{display:none}.diagram-state{margin-inline:auto;max-width:360px}
  .state-legend{position:static;width:auto;height:auto;clip-path:none;display:grid;gap:8px;list-style:none;padding:0;margin-top:24px;font-size:13px;color:var(--soft)}
  .state-legend time{display:inline-block;width:52px;color:var(--muted);font-variant-numeric:tabular-nums}.state-legend .now{color:var(--text);font-weight:560}
  .statement{font-size:24px!important;line-height:1.5}
  .progression{flex-direction:column;gap:12px;margin-top:32px}.progression li+li:before{content:'↓';margin:0 8px 0 0}
  .expansion{grid-template-columns:repeat(2,minmax(0,1fr));margin-top:44px}.expansion li{padding:24px 10px 24px;font-size:13px;border-top:1px solid var(--line)}.expansion li:nth-child(-n+2){border-top:0}
  .download{grid-template-columns:1fr}.download-actions{min-width:0}
  .footer-bottom{font-size:11px}
}
@media(max-width:480px){.stage{margin-inline:-8px}}
@media(prefers-reduced-motion:reduce){.button{transition:none}}

/* Quiet scroll utility; collision checks keep content unobstructed. */
.back-to-top{position:fixed;right:max(16px,env(safe-area-inset-right));bottom:max(16px,env(safe-area-inset-bottom));z-index:9;width:44px;height:44px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;background:var(--surface);color:var(--muted)}
.back-to-top[hidden]{display:none}
.back-to-top:hover{color:var(--text);border-color:var(--figure)}

/* Product chapters on desktop: the app frame sits inside the section with room around it
   instead of filling the content width. Narrower screens keep their existing sizing. */
@media(min-width:1280px){
  .chapter{padding-block:80px}
  .product-shot{width:min(1240px,88%);margin:48px auto 0}
  .chapter .stage-foot{width:min(1240px,88%);margin-inline:auto}
  /* The heading and lead start on the frame's left edge, keeping their own widths. */
  .chapter h2,.chapter .lead{margin-left:calc((100% - min(1240px,88%)) / 2)}
}
/* One sample case, four connected steps. The original app captures stay intact. */






.chapter-heading{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:36px;align-items:end}



.shot-link{display:block;position:relative;margin-top:36px;border-radius:12px}
.shot-link .product-shot{margin:0;max-width:none}
.shot-expand{position:absolute;right:12px;bottom:12px;min-height:36px;padding:9px 12px;border:1px solid #44474c;border-radius:6px;background:#17191c;color:#e9eaec;font-size:12px;opacity:0;transition:opacity .15s}
.shot-link:hover .shot-expand,.shot-link:focus-visible .shot-expand{opacity:1}
.mail-switch{display:flex;align-items:center;gap:8px;margin-top:28px;color:var(--figure)}
.mail-switch button{min-height:44px;padding:10px 16px;border:1px solid var(--line);border-radius:6px;font-size:13px;color:var(--muted)}
.mail-switch button[aria-pressed=true]{background:var(--surface-raised);border-color:var(--figure);color:var(--text)}
.mail-switch+.shot-link{margin-top:16px}
.image-viewer{width:100vw;max-width:none;height:100dvh;max-height:none;margin:0;padding:0;border:0;background:var(--bg);color:var(--text)}
.image-viewer[open]{display:flex;flex-direction:column}
.image-viewer::backdrop{background:rgb(0 0 0 / .9)}
.image-viewer-bar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:16px 24px;border-bottom:1px solid var(--line)}
.image-viewer-bar h2{font-size:16px;letter-spacing:-.02em}
.image-viewer-bar p,.image-viewer-note{font-size:12px;color:var(--muted);line-height:1.6}
.image-viewer-bar p{margin-top:6px}
.image-viewer-actions{display:flex;gap:8px;flex-shrink:0}
.image-viewer-actions button{min-width:60px;min-height:44px;padding:8px 12px;border:1px solid var(--figure);border-radius:6px;font-size:13px}
.image-viewer-scroll{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;padding:24px}
.image-viewer-scroll:focus-visible{outline:2px solid var(--focus);outline-offset:-4px}
.image-viewer-scroll img{width:auto;height:auto;max-width:100%;max-height:100%;margin:auto}
.image-viewer[data-zoomed] .image-viewer-scroll img{width:1280px;max-width:none;max-height:none;margin:0}
.image-viewer-note{padding:12px 24px;border-top:1px solid var(--line)}
body:has(.image-viewer[open]){overflow:hidden}
@media(max-width:1023px){.chapter-heading{grid-template-columns:1fr;gap:24px}}
@media(max-width:760px){

  .chapter-heading{gap:20px}
  .shot-link{margin-top:24px}.shot-expand{position:static;display:block;width:max-content;margin:10px 0 0 auto;opacity:1;background:none;border-color:var(--line);min-height:44px;padding:13px 14px}
  .image-viewer-bar{align-items:flex-start;flex-wrap:wrap;padding:12px 16px}.image-viewer-bar h2{font-size:15px}.image-viewer-bar p{font-size:11px}
  .image-viewer-scroll{padding:12px}.image-viewer-note{padding:12px 16px}
}
@media(prefers-reduced-motion:reduce){.shot-expand{transition:none}}

/* Product showcase: concise copy on the left, an intact app frame on the right. */
.chapter{display:grid;grid-template-columns:minmax(270px,.8fr) minmax(0,2fr);gap:32px 56px;align-items:center;padding-block:88px}

.chapter-heading{display:flex;flex-direction:column;align-items:flex-start;gap:28px;min-width:0}
.chapter h2,.chapter .lead{margin-left:0}
.chapter h2{font-size:clamp(27px,2.25vw,36px);line-height:1.42;text-wrap:pretty}
.chapter .lead{font-size:16px;line-height:1.8;margin-top:22px}


.chapter-visual{min-width:0}
.chapter-visual .shot-link{margin:0;padding:16px;background:var(--surface);border:1px solid var(--line);border-radius:16px}
.chapter-visual .product-shot{width:100%;margin:0;border-radius:8px}
.chapter-visual .shot-expand{position:static;display:block;width:max-content;opacity:1;margin:12px 0 0 auto;min-height:44px;padding:13px 4px 0;border:0;background:none;color:var(--soft)}
.chapter-visual .mail-switch{margin:0 0 16px}
.chapter .stage-foot{width:auto;margin:16px 0 0}

.hero-copy,.hero-demo,.stage-host{min-width:0}
@media(min-width:1280px){
  .hero{max-width:1760px;display:grid;grid-template-columns:minmax(260px,1fr) minmax(0,3fr);gap:40px;align-items:center;padding-top:56px;padding-bottom:88px}
  .hero h1{font-size:clamp(30px,2.5vw,44px);line-height:1.4}
  .hero h1 br,.hero-row p br{display:none}
  .hero-row{flex-direction:column;align-items:flex-start;gap:24px;margin-top:24px}
  .hero-row p{font-size:16px;line-height:1.8}
  .stage-host{position:relative;aspect-ratio:1296 / 772}
  .stage-host .stage{position:absolute;left:0;top:0;width:1296px;height:772px;margin:0;max-width:none;padding:16px;grid-template-columns:112px minmax(0,1fr);gap:16px;transform:scale(var(--stage-scale,1));transform-origin:top left}
  .stage-host .window{width:100%;max-width:none}
  .hero-demo .stage-foot{font-size:11px;gap:12px}
}
@media(min-width:1024px){
  #organize,#email-workflow{grid-template-columns:minmax(0,2fr) minmax(270px,.8fr)}
  #organize .chapter-heading,#email-workflow .chapter-heading{grid-column:2;grid-row:1}
  #organize .chapter-visual,#email-workflow .chapter-visual{grid-column:1;grid-row:1}
}
@media(min-width:1600px){
  #organize,#email-workflow{grid-template-columns:minmax(0,2.2fr) minmax(320px,.8fr)}
}
@media(min-width:1600px){.chapter{max-width:1760px;grid-template-columns:minmax(320px,.8fr) minmax(0,2.2fr);column-gap:72px}}
@media(max-width:1023px){
  .chapter{grid-template-columns:1fr;gap:28px;padding-block:64px}
  .chapter-heading{display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,.7fr);align-items:center;gap:32px}

  .chapter-visual{width:100%}
}
@media(max-width:760px){
  .chapter{padding-block:48px;gap:24px}.chapter-heading{display:flex;gap:20px}
  .chapter h2{font-size:27px}.chapter .lead{margin-top:16px}

  .chapter-visual .shot-link{padding:8px;border-radius:12px}.chapter-visual .shot-expand{margin-top:4px}
}

/* Keep the chapters focused on copy and images; mobile retains image inspection. */
.mail-switch button{border:0;border-radius:0;background:none;padding:10px 8px}
.mail-switch button[aria-pressed=true]{background:none;border-bottom:1px solid var(--soft)}
@media(min-width:761px){.chapter-visual .shot-expand{display:none}.chapter-visual .shot-link{cursor:default}}
@media(min-width:761px) and (max-width:1023px){.chapter-heading{grid-template-columns:1fr}}

/* A real generated archive is represented on the demonstration desktop. */
.package-item[hidden]{display:none!important}
button.package-item{cursor:pointer;touch-action:auto}
.package-selected{background:rgb(255 255 255 / .2);outline:1px solid rgb(255 255 255 / .5);outline-offset:2px}
@media(max-width:1279px){.desktop:has(.package-item:not([hidden])){display:flex;justify-content:space-between;gap:8px}.desktop .package-item{max-width:48%;font-size:10px}.desktop:has(.package-item:not([hidden])) [data-folder]{max-width:48%}}