/* HxH Studio. Màu, chữ và bo góc lấy theo trang chủ Ember v3 (keepember.com, 10/2026):
   nền kem, xanh ngọc + hồng như hai thuỳ của logo. Bo góc: thẻ 28px, khối lớn 40px,
   nút và nhãn tròn hẳn. Một theme sáng duy nhất, giống landing Ember. */
:root{
  --bg:#fbf9f5;--bg-2:#f4f0e6;--ink:#1a1816;--ink-2:#3c3833;--muted:#6b6660;
  --border:#e5ddcc;--success:#6fae8d;
  --ember:#1f8aa6;--ember-deep:#16728a;--teal:#5ebdd4;--pink:#ee9db8;--pink-ink:#c2557e;--glow:#f2a9c2;
  --card:color-mix(in oklab,white 78%,var(--bg));
  --display:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue","Segoe UI",system-ui,sans-serif;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue","Segoe UI",system-ui,sans-serif;
  --mono:ui-monospace,"SF Mono","JetBrains Mono",Menlo,Consolas,monospace;
  --ease:cubic-bezier(.2,.7,.2,1);--spring:cubic-bezier(.34,1.4,.5,1);
  --pad-x:clamp(20px,5vw,80px);--content:1200px;
  color-scheme:light;
}
*{box-sizing:border-box;margin:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font:400 17px/1.6 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:clip}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3{font-family:var(--display);text-wrap:balance}
p{text-wrap:pretty}
section{scroll-margin-top:88px}
:focus-visible{outline:2px solid var(--ember);outline-offset:3px;border-radius:6px}
.wrap{max-width:var(--content);margin:0 auto;padding:0 var(--pad-x)}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:12px;background:var(--ink);color:#fff;padding:8px 12px;border-radius:999px;z-index:30}

/* nav: viên thuốc nổi như Ember */
.nav{position:sticky;top:12px;z-index:20;padding:0 var(--pad-x)}
.nav-in{max-width:var(--content);margin:0 auto;height:56px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:0 10px 0 18px;border-radius:999px;background:color-mix(in oklab,white 72%,transparent);border:1px solid color-mix(in oklab,var(--border) 80%,transparent);backdrop-filter:saturate(160%) blur(14px);-webkit-backdrop-filter:saturate(160%) blur(14px);box-shadow:0 10px 30px -18px color-mix(in oklab,var(--ink) 30%,transparent)}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--display);font-weight:700;letter-spacing:-.02em;font-size:17px;white-space:nowrap}
.brand-mark{height:26px;padding:0 8px;border-radius:999px;background:var(--ink);color:#fff;display:inline-flex;align-items:center;font-size:12px;font-weight:700;letter-spacing:-.02em;white-space:nowrap}
.brand-mark i{font-style:normal;color:var(--pink)}
.nav ul{display:flex;gap:26px;list-style:none;padding:0;font-size:15px}
.nav ul a{color:var(--ink-2);transition:color .2s}
.nav ul a:hover{color:var(--ember-deep)}
.nav-end{display:flex;align-items:center;gap:8px}
.lang{font-size:13px;font-weight:600;border:1px solid var(--border);border-radius:999px;padding:6px 12px;background:var(--card)}
.lang:hover{border-color:var(--ember)}
.nav .btn{height:40px;padding:0 16px;font-size:14px}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:10px;height:52px;padding:0 24px;border-radius:999px;font-weight:600;font-size:16px;white-space:nowrap;transition:transform .15s,background .2s,border-color .2s}
.btn:active{transform:translateY(1px) scale(.98)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#000}
.btn-ghost{border:1px solid var(--border);background:var(--card);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ember)}
.btn svg{width:20px;height:20px;flex:none}

.kicker{display:inline-flex;align-items:center;padding:9px 14px;border-radius:999px;font-family:var(--mono);font-size:12px;font-weight:600;line-height:1;letter-spacing:.14em;text-transform:uppercase;border:1px solid color-mix(in oklab,var(--ember) 20%,transparent);background:color-mix(in oklab,var(--ember) 8%,white);color:var(--ember-deep)}
.grad{background:linear-gradient(90deg,var(--ember) 10%,var(--pink-ink) 90%);-webkit-background-clip:text;background-clip:text;color:transparent;padding-bottom:.08em}

/* hero: chữ giữa, tranh gouache của app bay quanh như hero Ember */
.hero{position:relative;isolation:isolate;display:grid;place-items:center;min-height:min(100dvh,920px);margin-top:-68px;padding:150px var(--pad-x) 112px;overflow:clip;
  background:radial-gradient(30% 32% at 2% 66%,color-mix(in oklab,var(--success) 18%,transparent),transparent 72%),radial-gradient(34% 34% at 96% 10%,color-mix(in oklab,var(--pink) 16%,transparent),transparent 72%),linear-gradient(180deg,var(--bg) 0%,color-mix(in oklab,var(--bg-2) 60%,var(--bg)) 100%)}
.hero-glow{position:absolute;z-index:-1;inset:20% 24%;border-radius:50%;background:radial-gradient(closest-side,color-mix(in oklab,var(--glow) 34%,transparent),transparent);filter:blur(24px)}
.hero-copy{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;max-width:900px;text-align:center}
.hero h1{margin-top:22px;font-size:clamp(40px,5.4vw,76px);font-weight:760;line-height:1.04;letter-spacing:-.045em}
.hero h1 span{display:block}
.hero h1 .grad{width:fit-content;margin-inline:auto}
.hero-lead{max-width:40ch;margin-top:24px;color:var(--ink-2);font-size:clamp(17px,1.45vw,21px);line-height:1.55}
.hero .ctas{margin-top:32px;display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.icons{position:absolute;inset:72px 0 48px;list-style:none;padding:0;pointer-events:none}
.icons li{position:absolute;left:var(--x);top:var(--y);translate:-50% -50%;width:var(--s)}
.disc{display:grid;place-items:center;aspect-ratio:1;border:1px solid color-mix(in oklab,var(--border) 70%,white);border-radius:50%;background:var(--card);box-shadow:inset 0 1px 0 rgb(255 255 255/90%),0 16px 30px -10px color-mix(in oklab,var(--ember) 22%,transparent),0 3px 8px color-mix(in oklab,var(--ink) 8%,transparent)}
.disc img{width:80%}

/* về studio */
.about{padding:120px 0 104px}
.about-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:64px;align-items:start}
.h2{font-size:clamp(32px,4vw,56px);font-weight:720;line-height:1.06;letter-spacing:-.035em}
.about .h2{margin-top:20px;max-width:16ch}
.about-body{margin-top:28px;display:grid;gap:18px;color:var(--ink-2);max-width:60ch}
.person{border-radius:28px;background:var(--card);border:1px solid var(--border);padding:28px;display:grid;gap:22px;box-shadow:0 24px 50px -36px color-mix(in oklab,var(--ember) 40%,transparent)}
.person-head{display:flex;align-items:center;gap:14px}
.avatar{width:72px;height:72px;border-radius:50%;object-fit:cover;flex:none;box-shadow:0 0 0 3px var(--card),0 0 0 4px var(--border)}
.person b{display:block;font-family:var(--display);font-size:19px;letter-spacing:-.01em}
.person-head span{color:var(--muted);font-size:14px}
.facts{display:grid;gap:12px;padding:0;list-style:none}
.facts li{display:flex;gap:12px;align-items:center;font-size:15px;color:var(--ink-2)}
.facts img{width:40px;height:40px;flex:none;border-radius:50%;background:var(--bg-2);padding:4px}

/* ember: nền kem đậm hơn một bậc */
.ember{padding:112px 0;background:var(--bg-2);border-radius:40px 40px 0 0}
.ember-head{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);gap:56px;align-items:center}
.ember-id{display:flex;align-items:center;gap:14px;margin-bottom:24px}
.ember-id img{width:60px;height:60px;filter:drop-shadow(0 10px 18px color-mix(in oklab,var(--ember) 24%,transparent))}
.ember-id b{display:block;font-family:var(--display);font-size:22px;letter-spacing:-.02em}
.ember-id span{font-size:14px;color:var(--muted)}
.ember .h2{font-size:clamp(34px,3.8vw,52px)}
.ember .h2 span{display:block}
.ember-lead{margin-top:20px;font-size:19px;color:var(--ink-2);max-width:44ch}
.ember-head .ctas{margin-top:32px;display:flex;flex-wrap:wrap;gap:12px}
.phone{position:relative;justify-self:center}
.phone::before{content:"";position:absolute;z-index:0;inset:8% -14%;border-radius:50%;background:radial-gradient(closest-side,color-mix(in oklab,var(--teal) 30%,transparent),transparent 70%),radial-gradient(closest-side at 70% 70%,color-mix(in oklab,var(--pink) 30%,transparent),transparent 70%);filter:blur(20px)}
.phone img{position:relative;width:min(340px,78vw);filter:drop-shadow(0 40px 50px color-mix(in oklab,var(--ink) 22%,transparent))}

.bento{margin-top:88px;display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:16px}
.cell{border-radius:28px;padding:32px;background:var(--card);border:1px solid var(--border);display:flex;flex-direction:column;gap:10px;overflow:hidden;position:relative}
.cell h3{font-size:24px;line-height:1.2;letter-spacing:-.02em;font-weight:700}
.cell p{color:var(--ink-2);font-size:16px;max-width:44ch}
.cell .art{width:72px;height:72px;margin-bottom:auto}
.c-keeper{grid-column:span 7;flex-direction:row;gap:28px;padding:32px 0 0 32px;background:linear-gradient(160deg,color-mix(in oklab,var(--teal) 22%,white),color-mix(in oklab,var(--ember) 14%,white));border-color:color-mix(in oklab,var(--ember) 22%,transparent)}
.c-keeper .txt{display:flex;flex-direction:column;gap:10px;padding-bottom:32px;min-width:0}
.c-keeper .q{font-family:var(--display);font-size:clamp(20px,2vw,26px);font-weight:700;letter-spacing:-.02em;line-height:1.25;color:var(--ember-deep);margin-bottom:auto}
.c-keeper .shot{align-self:flex-end;width:44%;flex:none;margin-bottom:-40px}
.c-vault{grid-column:span 5;padding:32px 32px 0;background:linear-gradient(170deg,color-mix(in oklab,var(--pink) 22%,white),var(--card));border-color:color-mix(in oklab,var(--pink) 34%,transparent)}
.c-vault .shot{width:62%;margin:20px auto -48px}
.c-voice,.c-remind,.c-more{grid-column:span 4;min-height:250px}
.c-private{grid-column:span 12;flex-direction:row;align-items:center;justify-content:space-between;gap:32px;background:var(--ink);border-color:var(--ink);color:#fff;padding:40px}
.c-private h3{font-size:clamp(24px,2.4vw,32px)}
.c-private p{color:color-mix(in oklab,white 74%,transparent)}
.c-private ul{list-style:none;padding:0;display:grid;gap:10px;min-width:280px;font-size:15px}
.c-private li{display:flex;gap:10px;align-items:baseline}
.c-private li::before{content:"";flex:none;width:8px;height:8px;border-radius:50%;background:linear-gradient(135deg,var(--teal),var(--pink));translate:0 -1px}

/* cách làm */
.how{padding:112px 0;background:var(--bg-2)}
.how-in{background:var(--bg);border-radius:40px;padding:72px clamp(24px,5vw,72px)}
.how .h2{max-width:18ch}
.how ol{list-style:none;padding:0;margin-top:56px;display:grid;grid-template-columns:1fr 1fr;column-gap:64px;row-gap:44px;counter-reset:p}
.how li{counter-increment:p;display:grid;grid-template-columns:48px 1fr;gap:4px 14px}
.how li::before{content:counter(p);grid-row:span 2;font-family:var(--display);font-weight:700;color:var(--ember-deep);font-size:16px;width:40px;height:40px;border-radius:50%;background:color-mix(in oklab,var(--ember) 8%,white);border:1px solid color-mix(in oklab,var(--ember) 20%,transparent);display:grid;place-items:center}
.how h3{font-size:21px;font-weight:700;letter-spacing:-.015em;padding-top:6px}
.how li p{color:var(--ink-2)}

/* liên hệ */
.contact{padding:120px 0 128px;text-align:center;position:relative;overflow:clip;background:radial-gradient(40% 50% at 50% 100%,color-mix(in oklab,var(--glow) 26%,transparent),transparent 70%)}
.contact .h2{max-width:18ch;margin:0 auto;font-size:clamp(36px,5vw,68px)}
.contact p{margin:20px auto 0;font-size:19px;color:var(--ink-2);max-width:48ch}
.contact .ctas{margin-top:36px;display:flex;justify-content:center}

footer{border-top:1px solid var(--border);padding:32px 0 40px;font-size:14px;color:var(--muted)}
footer .wrap{display:flex;justify-content:space-between;gap:16px 24px;flex-wrap:wrap}
footer nav{display:flex;gap:20px;flex-wrap:wrap}
footer a:hover{color:var(--ink)}

.nf{min-height:80dvh;display:grid;place-items:center;text-align:center;padding:64px 24px}
.nf h1{font-size:clamp(34px,5vw,56px);letter-spacing:-.035em}
.nf p{color:var(--ink-2);margin:16px 0 28px}

/* chuyển động: chỉ khi người dùng không tắt */
@media (prefers-reduced-motion:no-preference){
  .js .reveal{opacity:0;translate:0 28px;transition:opacity .9s var(--ease),translate .9s var(--ease)}
  .js .reveal.in{opacity:1;translate:none}
  .enter{animation:rise .9s var(--ease) both;animation-delay:var(--d,0ms)}
  .icons li .disc{animation:pop .9s var(--spring) both,bob 6s ease-in-out infinite;animation-delay:calc(var(--i)*70ms),calc(var(--i)*-0.7s)}
  @keyframes rise{from{opacity:0;translate:0 18px}}
  @keyframes pop{from{opacity:0;scale:.6}}
  @keyframes bob{50%{translate:0 -8px}}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* responsive */
@media (max-width:1100px){.icons li[data-far]{display:none}}
@media (max-width:960px){
  .about-grid,.ember-head{grid-template-columns:1fr;gap:48px}
  .c-keeper,.c-vault{grid-column:span 12}
  .c-voice,.c-remind{grid-column:span 6}
  .c-more{grid-column:span 12;min-height:0}
  .c-private{flex-direction:column;align-items:flex-start}
}
@media (max-width:760px){
  body{font-size:16px}
  .nav{top:8px;padding:0 12px}
  .nav ul,.nav .btn{display:none}
  .hero{padding:232px 16px 210px;min-height:0}
  .icons{inset:76px 0 0}
  .icons li{width:calc(var(--s) * .62)}
  .icons li[data-m="hide"]{display:none}
  .icons li[data-m="top"]{top:var(--mt);left:var(--mx)}
  .icons li[data-m="bottom"]{top:auto;bottom:var(--mb);left:var(--mx);translate:-50% 50%}
  .hero h1{margin-top:22px;font-size:38px}

  .wrap{padding:0 16px}
  .about,.ember,.how,.contact{padding:80px 0}
  .ember{border-radius:28px 28px 0 0}
  .how-in{border-radius:28px;padding:40px 20px}
  .bento{margin-top:56px}
  .c-voice,.c-remind{grid-column:span 12;min-height:0}
  .cell{padding:24px}
  .c-keeper{flex-direction:column;padding:24px 24px 0}
  .c-keeper .txt{padding-bottom:0}
  .c-keeper .shot{width:68%;align-self:center;margin-bottom:-56px}
  .c-private{padding:28px}
  .c-private ul{min-width:0}
  .how ol{grid-template-columns:1fr;row-gap:28px;margin-top:36px}
}

/* logo trên thanh điều hướng */
.brand img{width:18px;height:auto}
.store-badge{display:inline-block;transition:transform .12s ease}
.store-badge:hover{transform:translateY(-1px)}
.store-badge svg{display:block;height:52px;width:auto}
.store-badge svg text{direction:ltr;unicode-bidi:isolate}
.btn small{font-weight:500;font-size:12px;opacity:.7;margin-left:2px}
.btn.sm{height:44px;padding:0 18px;font-size:14px}

/* trang nhận diện */
.kit{padding:40px 0 40px}
.kit-hero{padding:48px 0 32px;border-bottom:1px solid var(--border)}
.kit-logo{width:min(420px,80vw);height:auto;margin-bottom:36px}
.kit-hero h1{margin-top:18px;font-size:clamp(34px,4.6vw,60px);font-weight:740;letter-spacing:-.035em;line-height:1.05;max-width:18ch}
.kit-lead{margin-top:18px;font-size:19px;color:var(--ink-2);max-width:62ch}
.kit-meta{margin-top:10px;font-size:14px;color:var(--muted)}
.kit-hero .ctas{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap}
.kit-chips{margin-top:28px;display:flex;flex-wrap:wrap;gap:8px}
.kit-chips a,.pill{font-size:14px;padding:7px 14px;border-radius:999px;border:1px solid var(--border);background:var(--card);color:var(--ink-2)}
.kit-chips a:hover,.pill:hover{border-color:#78C443;color:var(--ink)}
.kit-sec{padding:64px 0;border-bottom:1px solid var(--border)}
.kit-sec:last-of-type{border-bottom:0}
.sec-head{display:flex;justify-content:space-between;align-items:flex-start;gap:24px;flex-wrap:wrap;margin-bottom:28px}
.sec-head h2{font-size:clamp(26px,2.8vw,36px);font-weight:720;letter-spacing:-.025em}
.sec-head p{margin-top:8px;color:var(--ink-2);max-width:62ch}
.sub{margin:44px 0 16px;font-size:20px;font-weight:700;letter-spacing:-.01em}
.swatches{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:14px}
.swatch{border:1px solid var(--border);border-radius:22px;background:var(--card);padding:10px 10px 14px;display:flex;flex-direction:column;align-items:flex-start;gap:2px}
.chip{display:block;width:100%;height:92px;border-radius:14px;margin-bottom:10px}
.swatch b{font-size:15px;padding:0 6px 4px}
.copy{font:inherit;font-size:13px;color:var(--ink-2);background:none;border:0;padding:3px 6px;border-radius:8px;cursor:pointer;text-align:left;font-family:var(--mono)}
.copy:hover{background:var(--bg-2);color:var(--ink)}
.files{margin-top:18px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.files span{font-size:14px;color:var(--muted);margin-right:4px}
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:22px;background:var(--card)}
.names{width:100%;border-collapse:collapse;font-size:15px}
.names th,.names td{text-align:left;padding:12px 16px;vertical-align:top;border-bottom:1px solid var(--border)}
.names tr:last-child th,.names tr:last-child td{border-bottom:0}
.names thead th{font-size:13px;color:var(--muted);font-weight:600}
.names tbody th{font-weight:600;white-space:nowrap}
.names td:last-child{color:var(--muted)}
.names .copy{font-family:var(--sans);font-size:15px;color:var(--ink)}
.variants{margin:-8px 0 24px;padding:18px 20px;border-radius:22px;background:var(--bg-2)}
.variants h3{font-size:16px;margin-bottom:8px}
.variants ul{margin:0;padding-left:18px;color:var(--ink-2);font-size:15px;display:grid;gap:4px}
.variants code{font-size:13px;background:var(--card);padding:1px 6px;border-radius:6px}
.assets{list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.assets.wide{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}
.asset{border:1px solid var(--border);border-radius:22px;background:var(--card);overflow:visible;position:relative}
.preview{height:180px;display:flex;align-items:center;justify-content:center;padding:24px;border-radius:21px 21px 0 0;overflow:hidden}
.assets.wide .preview{height:200px}
.preview img{display:block;max-width:100%;max-height:100%;width:auto;height:auto}
.assets.wide .preview img{border-radius:8px}
.asset-body{padding:12px 14px 14px;display:flex;justify-content:space-between;align-items:center;gap:8px}
.asset-body code{font-size:12.5px;color:var(--ink-2);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.dl{position:relative;flex:none}
.dl summary{list-style:none;display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;padding:7px 12px;border-radius:999px;background:var(--bg-2);cursor:pointer}
.dl summary::-webkit-details-marker{display:none}
.dl summary svg,.btn svg{width:16px;height:16px}
.dl ul{position:absolute;right:0;top:calc(100% + 6px);z-index:5;list-style:none;margin:0;padding:6px;min-width:190px;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:0 18px 40px -20px rgb(0 0 0/35%)}
.dl li a{display:flex;justify-content:space-between;gap:12px;padding:8px 10px;border-radius:8px;font-size:14px}
.dl li a:hover{background:var(--bg-2)}
.dl li span{font-size:11px;color:var(--muted);font-family:var(--mono)}
.usage{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.usage>div{border-radius:22px;padding:24px 26px;border:1px solid var(--border);background:var(--card)}
.usage h3{font-size:18px;margin-bottom:10px}
.usage ul{margin:0;padding-left:18px;display:grid;gap:8px;color:var(--ink-2)}
.do{box-shadow:inset 4px 0 0 #78C443}
.dont{box-shadow:inset 4px 0 0 #dc2626}
.kit-contact{margin-top:24px;color:var(--ink-2)}
.kit-contact a{text-decoration:underline;text-underline-offset:3px}
.toast{position:fixed;left:50%;bottom:24px;translate:-50% 20px;opacity:0;pointer-events:none;background:var(--ink);color:#fff;padding:10px 16px;border-radius:999px;font-size:14px;transition:opacity .2s,translate .2s;z-index:40}
.toast.on{opacity:1;translate:-50% 0}
.sr{position:fixed;left:-9999px;top:0;opacity:0}
@media (max-width:760px){
  .usage{grid-template-columns:1fr}
  .kit-sec{padding:48px 0}
  .assets.wide{grid-template-columns:1fr}
  .store-badge svg{height:46px}
}