/* VYSN AI public home page.
   Look: a soft "sheet" on a tinted page, rounded bento cards, a lavender hero card with the real app on a phone,
   monospace labels, pill tags and smooth scroll reveals. Light and dark themes. */
:root{
  --page:#e4e1ef; --sheet:#f6f5fa; --card:#ffffff; --card2:#efedf6; --ink:#17151f; --soft:#4f4b63; --muted:#6c6880;
  --line:rgba(26,20,48,.10); --accent:#6a4fe0; --accent-ink:#ffffff; --lav:#cfc3ff; --lav2:#b9a8ff; --lav-ink:#1d1440;
  --accent-soft:#efeaff; --sos:#c4282d; --dark:#141120; --dark-ink:#f2f0fa;
  --display:'Instrument Sans','Inter',system-ui,sans-serif; --body:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r-xl:36px; --r-lg:28px; --r-md:20px; --ease:cubic-bezier(.2,.7,.2,1);
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --page:#0b0a10; --sheet:#121019; --card:#1b1826; --card2:#211d2f; --ink:#f2f0fa; --soft:#c8c3da; --muted:#a29db7;
  --line:rgba(255,255,255,.09); --accent:#9d86ff; --accent-ink:#120e24; --lav:#3a2f6e; --lav2:#4b3d8f; --lav-ink:#f2f0fa;
  --accent-soft:#2a2440; --sos:#ff8f8a; --dark:#1f1a33; --dark-ink:#f2f0fa; color-scheme:dark}}
:root[data-theme="dark"]{
  --page:#0b0a10; --sheet:#121019; --card:#1b1826; --card2:#211d2f; --ink:#f2f0fa; --soft:#c8c3da; --muted:#a29db7;
  --line:rgba(255,255,255,.09); --accent:#9d86ff; --accent-ink:#120e24; --lav:#3a2f6e; --lav2:#4b3d8f; --lav-ink:#f2f0fa;
  --accent-soft:#2a2440; --sos:#ff8f8a; --dark:#1f1a33; --dark-ink:#f2f0fa; color-scheme:dark}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px;interpolate-size:allow-keywords}
body{margin:0;background:var(--page);color:var(--ink);font:16px/1.6 var(--body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3{font-family:var(--display);margin:0;letter-spacing:-.025em;text-wrap:balance;line-height:1.05}
p{margin:0}
a{color:var(--accent);text-underline-offset:3px}
img{max-width:100%;display:block}
.mono{font-family:var(--mono);letter-spacing:-.01em}
.i{width:1.1em;height:1.1em;flex:0 0 auto}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:10px}
.skip{position:absolute;left:-999px;top:8px;z-index:20;background:var(--ink);color:var(--sheet);padding:10px 16px;border-radius:12px}
.skip:focus{left:12px}

/* sheet */
.sheet{max-width:1280px;margin:20px auto;background:var(--sheet);border-radius:var(--r-xl);padding:0 28px 28px;box-shadow:0 1px 0 var(--line),0 30px 80px rgba(30,20,70,.08)}
@media (max-width:760px){.sheet{margin:0;border-radius:0;padding:0 14px 18px}}

/* nav */
.nav{position:sticky;top:12px;z-index:10;display:flex;align-items:center;gap:16px;padding:12px 12px 12px 16px;margin:0 -8px;border-radius:22px;
  transition:background .35s var(--ease),box-shadow .35s var(--ease)}
.nav.stuck{background:color-mix(in srgb,var(--card) 82%,transparent);backdrop-filter:blur(18px) saturate(1.4);-webkit-backdrop-filter:blur(18px) saturate(1.4);box-shadow:0 10px 40px rgba(20,14,50,.10),inset 0 0 0 1px var(--line)}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font:700 19px var(--display);letter-spacing:-.02em}
.nav nav{display:flex;gap:2px;margin-left:auto;font-family:var(--mono);font-size:14px}
.nav nav a{color:var(--soft);text-decoration:none;padding:8px 12px;border-radius:999px;transition:background .2s,color .2s}
.nav nav a:hover{background:var(--accent-soft);color:var(--ink)}
@media (max-width:860px){.nav nav{display:none}.nav .btn{margin-left:auto}}

/* buttons, tags */
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--accent);color:var(--accent-ink);text-decoration:none;font:600 16px var(--body);
  padding:14px 22px;border-radius:999px;border:0;cursor:pointer;transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .2s;box-shadow:0 10px 30px color-mix(in srgb,var(--accent) 35%,transparent)}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 40px color-mix(in srgb,var(--accent) 45%,transparent)}
.btn:active{transform:translateY(0)}
.btn .i{transition:transform .25s var(--ease)}.btn:hover .i{transform:translate(2px,-2px)}
.btn.ghost{background:var(--card);color:var(--ink);box-shadow:inset 0 0 0 1px var(--line)}
.btn.dark{background:var(--ink);color:var(--sheet);box-shadow:none}
.btn.light{background:#fff;color:#1d1440;box-shadow:0 14px 40px rgba(0,0,0,.25)}
.btn.small{padding:10px 18px;font-size:15px}
.tag{display:inline-block;font-size:13px;padding:6px 12px;border-radius:999px;box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--ink) 30%,transparent);color:var(--ink);background:color-mix(in srgb,var(--card) 60%,transparent)}
.tag.light{color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.45);background:transparent}

/* hero */
.hero{display:grid;grid-template-columns:1fr 1.05fr;gap:16px;margin-top:8px}
.hero-card{background:var(--card);border-radius:var(--r-lg);padding:clamp(28px,4vw,52px);display:flex;flex-direction:column;align-items:flex-start;gap:22px;min-height:560px}
.hero h1{font-size:clamp(40px,5.4vw,72px);letter-spacing:-.035em}
.lead{color:var(--soft);font-size:15px;line-height:1.75;max-width:46ch}
.ctas{display:flex;flex-wrap:wrap;gap:12px;margin-top:4px}
.fine{color:var(--muted);font-size:13px;margin-top:-8px}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:auto;font-size:13px}
.chips span{display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border-radius:14px;background:var(--card2);color:var(--soft)}
.hero-art{position:relative}
.art-card{position:relative;height:100%;min-height:560px;border-radius:var(--r-lg);overflow:hidden;
  background:radial-gradient(80% 60% at 80% 0%,rgba(255,255,255,.55),transparent 60%),linear-gradient(160deg,var(--lav),var(--lav2));color:var(--lav-ink)}
.phone{position:absolute;right:9%;bottom:-120px;width:min(300px,52%);margin:0;padding:9px;border-radius:44px;background:#16131f;
  box-shadow:0 0 0 2px #2c2740,0 40px 80px rgba(29,20,64,.35);transform:rotate(-4deg);transition:transform .8s var(--ease)}
.phone img{border-radius:36px;width:100%;height:auto}
.hero-art:hover .phone{transform:rotate(-2deg) translateY(-10px)}
.float.stat{position:absolute;left:7%;top:9%;z-index:2;padding:16px 20px;border-radius:20px;background:rgba(255,255,255,.62);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  color:#1d1440;box-shadow:0 20px 50px rgba(29,20,64,.18);animation:bob 6s ease-in-out infinite}
.float small{display:block;font-size:12px;opacity:.7}
.float b{display:block;font:700 30px var(--display);letter-spacing:-.02em;margin:2px 0}
.float b span{font-size:16px;font-weight:600;opacity:.6}
.float em{font-style:normal;font-size:12px;color:#4b2fc4}
.corner{position:absolute;right:7%;top:9%;text-align:right;font-size:13px;line-height:1.5;text-transform:uppercase;letter-spacing:.06em;opacity:.8}
.spin{position:absolute;left:-58px;bottom:44px;z-index:3;width:116px;height:116px;border-radius:50%;background:var(--sheet);display:grid;place-items:center;color:var(--ink);text-decoration:none;
  box-shadow:0 0 0 10px var(--sheet)}
.spin .ring-t{position:absolute;inset:0;width:100%;height:100%;animation:spin 16s linear infinite}
.spin text{font:500 11.5px var(--mono);fill:currentColor;letter-spacing:.06em}
.spin>.i{width:26px;height:26px;transition:transform .3s var(--ease)}
.spin:hover>.i{transform:translateY(4px)}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes bob{50%{transform:translateY(-10px)}}
@media (max-width:980px){
  .hero{grid-template-columns:1fr}
  .hero-card{min-height:0}
  .art-card{min-height:520px}
  .spin{display:none}
}
@media (max-width:520px){.art-card{min-height:470px}.phone{right:50%;transform:translateX(50%) rotate(-3deg);width:240px;bottom:-110px}.hero-art:hover .phone{transform:translateX(50%) rotate(-3deg)}.float.stat{left:5%;top:6%}.corner{display:none}}

/* launch countdown */
.launch{display:flex;flex-direction:column;gap:14px;width:100%}
.launch-date{font-size:14px;color:var(--soft)}
.launch-date span{display:inline-block;margin-left:8px;padding:2px 10px;border-radius:999px;background:var(--accent-soft);color:var(--accent)}
.count{display:flex;gap:10px}
.count div{flex:1;max-width:110px;text-align:center;padding:16px 8px;border-radius:18px;background:var(--card2)}
.count b{display:block;font:700 40px/1 var(--display);font-variant-numeric:tabular-nums}
.count small{font:500 12px var(--mono);color:var(--muted)}

/* founding offer */
.offer{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:16px;padding:18px 22px;border-radius:var(--r-md);background:var(--dark);color:var(--dark-ink)}
.offer p{flex:1;min-width:260px;color:color-mix(in srgb,var(--dark-ink) 80%,transparent)}
.offer b{color:var(--dark-ink)}
.offer-tag{padding:6px 12px;border-radius:999px;background:#b9a8ff;color:#1d1440;font-size:13px;font-weight:500}
.offer .left{font-size:14px;color:#c4b5ff}

/* section heads */
section{scroll-margin-top:96px}
.head{text-align:center;max-width:720px;margin:0 auto 34px;display:flex;flex-direction:column;align-items:center;gap:16px}
.head h2,.mission h2,.split h2,.safety h2,.cta h2{font-size:clamp(30px,3.6vw,48px)}
.head p{color:var(--soft);font-size:14px}

/* mission */
.mission{text-align:center;padding:clamp(70px,9vw,120px) 16px 40px;max-width:900px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:20px}
.mission>p{color:var(--soft);font-size:15px;max-width:60ch}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;width:100%;margin-top:26px}
.stats div{background:var(--card);border-radius:var(--r-md);padding:22px 18px;text-align:left}
.stats b{display:block;font:700 46px/1 var(--display);letter-spacing:-.03em;color:var(--accent)}
.stats span{display:block;margin-top:8px;font-size:13px;color:var(--soft)}
@media (max-width:640px){.stats{grid-template-columns:1fr}}

/* split rows */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,5vw,70px);align-items:center;padding:40px 0}
.split.flip .shot-card{order:2}
.shot-card{position:relative;height:520px;border-radius:var(--r-lg);overflow:hidden;background:linear-gradient(160deg,#d9d6e3,#a9a5b8)}
.shot-card.lav{background:linear-gradient(160deg,var(--lav),var(--lav2))}
.phone.sm{width:min(270px,64%);right:auto;left:50%;bottom:-130px;transform:translateX(-50%)}
.split:hover .phone.sm{transform:translateX(-50%) translateY(-12px)}
.split-copy{display:flex;flex-direction:column;align-items:flex-start;gap:18px;max-width:520px}
.split-copy p{color:var(--soft);font-size:15px;line-height:1.7}
.ticks{list-style:none;margin:4px 0 0;padding:0;display:flex;flex-direction:column;gap:10px}
.ticks li{position:relative;padding-left:34px;font-weight:500}
.ticks li::before{content:"";position:absolute;left:0;top:2px;width:22px;height:22px;border-radius:50%;background:var(--accent-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236a4fe0' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12l4 4 8-8'/%3E%3C/svg%3E") center/14px no-repeat}
@media (max-width:860px){.split{grid-template-columns:1fr}.split.flip .shot-card{order:0}.shot-card{height:440px}}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .shot-card:not(.lav){background:linear-gradient(160deg,#2a2638,#17141f)}}

/* features */
.features{padding:80px 0 20px}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.fcard{display:flex;flex-direction:column;gap:12px;min-height:300px;padding:22px;border-radius:var(--r-md);background:var(--card);transition:transform .35s var(--ease),box-shadow .35s var(--ease),background .3s}
.fcard:hover{transform:translateY(-6px);box-shadow:0 24px 50px rgba(30,20,70,.12)}
.fcard .ico,.pgrid .ico{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;background:var(--card2);color:var(--ink)}
.fcard .ico{margin-bottom:auto}
.fcard .ico .i,.pgrid .ico .i{width:22px;height:22px}
.fcard h3{font-size:22px;margin-top:40px}
.fcard p{font-size:13px;color:var(--soft);line-height:1.65}
.more{display:inline-flex;align-items:center;gap:6px;align-self:flex-start;font-size:12.5px;text-decoration:none;color:#1d1440;background:#cfc3ff;padding:8px 12px;border-radius:10px;transition:gap .2s}
.more:hover{gap:10px}
.fcard.on{background:linear-gradient(160deg,var(--lav),var(--lav2));color:var(--lav-ink)}
.fcard.on p{color:color-mix(in srgb,var(--lav-ink) 78%,transparent)}
.fcard.on .ico{background:rgba(255,255,255,.55);color:#1d1440}
.fcard.on .more{background:#1d1440;color:#fff}
@media (max-width:1000px){.cards{grid-template-columns:repeat(2,1fr)}}
@media (max-width:540px){.cards{grid-template-columns:1fr}.fcard{min-height:0}.fcard h3{margin-top:18px}}

/* who + plans */
.who{padding:60px 0 20px}
.bento{display:grid;grid-template-columns:1fr 1fr 1.1fr;gap:14px}
.b-card{display:flex;flex-direction:column;align-items:flex-start;gap:14px;padding:26px;border-radius:var(--r-md);background:var(--card)}
.b-card h3{font-size:28px;margin-top:auto}
.b-card p{font-size:13px;color:var(--soft);line-height:1.65}
.plans{gap:10px}
.plan{width:100%;display:grid;grid-template-columns:1fr auto;gap:2px 12px;padding:14px 16px;border-radius:14px;background:var(--card2)}
.plan b{font-family:var(--display);font-size:17px}
.plan span{grid-column:1;font-size:12.5px;color:var(--muted)}
.plan em{grid-row:1/3;grid-column:2;align-self:center;font-style:normal;font-size:12px;padding:5px 10px;border-radius:999px;background:var(--card);color:var(--soft)}
.plan.on{background:var(--ink);color:var(--sheet)}
.plan.on span{color:color-mix(in srgb,var(--sheet) 70%,transparent)}
.plan.on em{background:#b9a8ff;color:#1d1440}
@media (max-width:900px){.bento{grid-template-columns:1fr}.b-card h3{margin-top:6px}}

/* safety */
.safety{display:grid;grid-template-columns:1.2fr 1fr;gap:30px;align-items:center;margin-top:60px;padding:clamp(28px,4vw,52px);border-radius:var(--r-lg);background:var(--dark);color:var(--dark-ink)}
.safety>div:first-child{display:flex;flex-direction:column;align-items:flex-start;gap:18px}
.safety .tag{color:var(--dark-ink);box-shadow:inset 0 0 0 1px rgba(255,255,255,.35);background:transparent}
.safety p{color:color-mix(in srgb,var(--dark-ink) 75%,transparent);font-size:14px;line-height:1.7}
.safety .link{color:#c4b5ff}
.sos{display:flex;flex-direction:column;gap:12px}
.sos a{display:flex;align-items:center;gap:16px;padding:18px;border-radius:20px;background:rgba(255,255,255,.06);color:var(--dark-ink);text-decoration:none;transition:background .25s,transform .25s var(--ease)}
.sos a:hover{background:rgba(255,255,255,.11);transform:translateX(4px)}
.sos .ring{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;background:#e5484d;color:#fff;flex:0 0 auto}
.sos .ring.soft{background:#6a4fe0}
.sos .ring .i{width:22px;height:22px}
.sos b{display:block;font:700 30px/1 var(--display)}
.sos small{display:block;margin-top:6px;font-size:12.5px;color:color-mix(in srgb,var(--dark-ink) 70%,transparent)}
@media (max-width:860px){.safety{grid-template-columns:1fr}}

/* privacy */
.privacy{padding:90px 0 20px}
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.pgrid article{display:flex;flex-direction:column;gap:12px;padding:22px;border-radius:var(--r-md);background:var(--card)}
.pgrid .ico{margin-bottom:14px}
.pgrid h3{font-size:19px}
.pgrid p{font-size:13px;color:var(--soft);line-height:1.65}
.links{text-align:center;margin-top:22px;font-size:13px;color:var(--muted)}
@media (max-width:1000px){.pgrid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:540px){.pgrid{grid-template-columns:1fr}}

/* FAQ */
.faq{padding:90px 0 20px}
.qa{max-width:960px;margin:0 auto;display:flex;flex-direction:column}
.qa details{border-bottom:1px solid var(--line);transition:background .3s,border-radius .3s}
.qa details[open]{background:var(--card);border-radius:var(--r-md);border-color:transparent}
.qa summary{list-style:none;display:grid;grid-template-columns:56px 1fr 34px;align-items:center;gap:12px;padding:20px 18px;cursor:pointer;font:600 17px var(--display)}
.qa summary::-webkit-details-marker{display:none}
.qa .n{font-size:12px;color:var(--muted);width:30px;height:30px;display:grid;place-items:center;border-radius:9px;transition:background .25s,color .25s}
.qa details[open] .n{background:var(--ink);color:var(--sheet)}
.pm{position:relative;width:30px;height:30px;border-radius:9px;background:#cfc3ff}
.pm::before,.pm::after{content:"";position:absolute;left:50%;top:50%;width:12px;height:2px;margin:-1px 0 0 -6px;background:#1d1440;border-radius:2px;transition:transform .3s var(--ease)}
.pm::after{transform:rotate(90deg)}
.qa details[open] .pm::after{transform:rotate(0)}
.qa .a{padding:0 18px 22px 86px;color:var(--soft);font-size:13.5px;line-height:1.75}
.qa .a p{max-width:68ch}
.qa details::details-content{block-size:0;overflow:hidden;transition:block-size .4s var(--ease),content-visibility .4s allow-discrete}
.qa details[open]::details-content{block-size:auto}
@media (max-width:600px){.qa summary{grid-template-columns:38px 1fr 30px;font-size:16px;padding:18px 10px}.qa .a{padding:0 12px 20px 60px}}

/* CTA / about */
.cta{display:grid;grid-template-columns:1.4fr 1fr;gap:30px;align-items:center;margin-top:90px;padding:clamp(30px,5vw,60px);border-radius:var(--r-lg);color:#fff;
  background:radial-gradient(70% 90% at 90% 10%,rgba(255,255,255,.22),transparent 60%),linear-gradient(140deg,#4a32c9,#7b5cf0 60%,#a58cff)}
.cta>div:first-child{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.cta p{color:rgba(255,255,255,.88);font-size:14px;line-height:1.7}
.cta a:not(.btn){color:#fff}
.cta .small{font-size:13px}
.social{display:flex;flex-wrap:wrap;gap:8px}
.social a{padding:6px 12px;border-radius:999px;background:rgba(255,255,255,.14);text-decoration:none;font-size:13px}
.cta-side{display:flex;flex-direction:column;align-items:center;gap:24px}
.cta-orb{filter:drop-shadow(0 20px 40px rgba(20,10,60,.4));animation:bob 7s ease-in-out infinite}
@media (max-width:820px){.cta{grid-template-columns:1fr}.cta-side{align-items:center;flex-direction:row;justify-content:space-between}.cta-orb{width:96px;height:96px}}

/* footer */
.foot{margin-top:28px;padding:26px 8px 6px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:14px;color:var(--muted)}
.foot-top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px}
.foot-top p{display:flex;flex-wrap:wrap;gap:6px 18px;font-size:13px}
.foot a{color:var(--soft);text-decoration:none}.foot a:hover{color:var(--ink)}
.small{font-size:12.5px}

/* scroll reveal (only when JS is on, so the page is never blank without it) */
.js .reveal{opacity:0;transform:translateY(28px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.js .reveal[data-delay="1"]{transition-delay:.08s}.js .reveal[data-delay="2"]{transition-delay:.16s}.js .reveal[data-delay="3"]{transition-delay:.24s}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .reveal{opacity:1;transform:none;transition:none}
  .spin .ring-t,.float.stat,.cta-orb{animation:none}
  .phone,.fcard,.btn{transition:none}
}

/* launch event bar */
.evbar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:6px 0 10px;padding:14px 18px;border-radius:18px;background:var(--dark);color:var(--dark-ink);text-decoration:none;font-size:14px;transition:transform .25s var(--ease)}
.evbar:hover{transform:translateY(-2px)}
.evbar .dot{width:10px;height:10px;border-radius:50%;background:#e5484d;box-shadow:0 0 0 0 rgba(229,72,77,.6);animation:live 1.6s infinite}
.evbar .go{margin-left:auto;display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;background:#b9a8ff;color:#1d1440;font-weight:600}
.nav nav a.evnav{color:var(--accent);font-weight:500}
@keyframes live{70%{box-shadow:0 0 0 10px rgba(229,72,77,0)}100%{box-shadow:0 0 0 0 rgba(229,72,77,0)}}
@media (max-width:600px){.evbar .go{margin-left:0}}
@media (prefers-reduced-motion:reduce){.evbar .dot{animation:none}}