:root{
  --night:#0B1B3F; --night-d:#071230; --blue:#1F5EFF; --cyan:#00C2E0; --cyan-l:#00E5FF;
  --slate:#4A5875; --mist:#F5F7FB; --white:#fff; --line:#e3e8f2;
  --r:18px; --ease:cubic-bezier(.2,.7,.2,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:"Plus Jakarta Sans",system-ui,sans-serif;color:var(--night);background:var(--white);line-height:1.6;-webkit-font-smoothing:antialiased}
button,input,select,textarea{font-family:inherit}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
.wrap{width:min(1160px,100% - 40px);margin-inline:auto}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--blue);color:#fff;font-weight:700;font-size:16px;line-height:1;padding:16px 26px;border-radius:999px;border:0;cursor:pointer;transition:transform .25s var(--ease),box-shadow .25s,background .2s;box-shadow:0 10px 30px -10px rgba(31,94,255,.8)}
.btn:hover{transform:translateY(-2px);background:#3a73ff;box-shadow:0 16px 36px -10px rgba(31,94,255,.9)}
.btn-sm{padding:11px 20px;font-size:14px}
.btn-ghost{background:rgba(255,255,255,.08);box-shadow:none;border:1px solid rgba(255,255,255,.22)}
.btn-ghost:hover{background:rgba(255,255,255,.16);box-shadow:none}
.btn-ghost.on{border-color:var(--cyan);color:var(--cyan-l)}

/* nav */
.nav{position:fixed;inset:0 0 auto;z-index:50;transition:background .3s,box-shadow .3s}
.nav.stuck{background:rgba(7,18,48,.86);backdrop-filter:blur(14px);box-shadow:0 1px 0 rgba(255,255,255,.07)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:72px}
.links{display:flex;align-items:center;gap:30px;color:#cdd7ee;font-weight:500;font-size:15px}
.links a:not(.btn):hover{color:#fff}
.burger{display:none;background:none;border:0;width:40px;height:40px;position:relative;cursor:pointer}
.burger span{position:absolute;left:8px;right:8px;height:2px;background:#fff;border-radius:2px;transition:.25s}
.burger span:first-child{top:15px}.burger span:last-child{top:23px}
.burger[aria-expanded=true] span:first-child{top:19px;transform:rotate(45deg)}
.burger[aria-expanded=true] span:last-child{top:19px;transform:rotate(-45deg)}

/* hero */
.hero{position:relative;overflow:hidden;background:var(--night-d);color:#fff;padding:150px 0 110px}
.glow{position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none;opacity:.55}
.g1{width:520px;height:520px;background:var(--blue);top:-160px;right:-80px;animation:drift 14s ease-in-out infinite alternate}
.g2{width:420px;height:420px;background:var(--cyan);bottom:-200px;left:-120px;opacity:.28;animation:drift 18s ease-in-out infinite alternate-reverse}
@keyframes drift{to{transform:translate(50px,40px) scale(1.12)}}
.hero-in{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:60px;align-items:center}
.pill{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--cyan-l);border:1px solid rgba(0,229,255,.35);background:rgba(0,229,255,.08);padding:7px 14px;border-radius:999px;margin-bottom:22px}
h1{font-size:clamp(36px,5.4vw,64px);line-height:1.08;font-weight:800;letter-spacing:-.025em}
.grad{background:linear-gradient(90deg,var(--cyan-l),#6aa2ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{margin:24px 0 32px;font-size:19px;color:#c3cfe8;max-width:560px}
.lead strong{color:#fff}
.cta{display:flex;flex-wrap:wrap;gap:14px}
.trust{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:34px;color:#9fb0d3;font-size:14px;font-weight:500}
.trust li::before{content:"✓";color:var(--cyan);margin-right:8px;font-weight:800}

/* phone mock */
.hero-vis{position:relative;display:flex;justify-content:center}
.phone{width:290px;background:#fff;color:var(--night);border-radius:34px;padding:22px 20px 24px;box-shadow:0 40px 90px -20px rgba(0,0,0,.7),0 0 0 8px rgba(255,255,255,.06);position:relative;animation:bob 6s ease-in-out infinite}
@keyframes bob{50%{transform:translateY(-10px)}}
.ph-top{display:flex;align-items:center;gap:8px;font-size:14px;margin-bottom:18px}
.ph-top .dot{width:10px;height:10px;border-radius:50%;background:var(--cyan)}
.ph-top em{margin-left:auto;font-style:normal;font-size:12px;color:var(--slate);background:var(--mist);padding:3px 9px;border-radius:99px}
.checks li{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--line);font-size:15px;font-weight:500;color:var(--slate);transition:color .3s}
.checks li small{margin-left:auto;background:var(--mist);padding:1px 8px;border-radius:99px;font-weight:700;color:var(--night)}
.checks i{width:22px;height:22px;border-radius:50%;border:2px solid #cbd5e8;flex:none;position:relative;transition:.35s var(--ease)}
.checks li.ok{color:var(--night)}
.checks li.ok i{background:var(--blue);border-color:var(--blue)}
.checks li.ok i::after{content:"";position:absolute;left:6px;top:2px;width:5px;height:10px;border:solid #fff;border-width:0 2.5px 2.5px 0;transform:rotate(45deg)}
.ph-btn{margin-top:20px;text-align:center;background:var(--mist);color:var(--slate);font-weight:700;padding:14px;border-radius:14px;transition:.4s}
.ph-btn.ready{background:var(--blue);color:#fff;box-shadow:0 10px 24px -8px rgba(31,94,255,.8)}
.sent{position:absolute;inset:auto 20px 24px;display:flex;align-items:center;justify-content:center;gap:8px;background:var(--cyan);color:var(--night);font-weight:800;padding:14px;border-radius:14px;opacity:0;transform:translateY(10px);transition:.4s var(--ease)}
.sent.show{opacity:1;transform:none}
.float{position:absolute;background:rgba(255,255,255,.1);backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.18);border-radius:16px;padding:14px 18px;display:flex;flex-direction:column;line-height:1.25;animation:bob 7s ease-in-out infinite}
.float span{font-size:12px;color:#b8c6e6}.float b{font-size:28px;font-weight:800}.float small{font-size:12px;color:var(--cyan-l)}
.f1{left:-6px;top:60px;animation-delay:-2s}.f2{right:-6px;bottom:70px;animation-delay:-4s}

/* band */
.band{background:var(--mist);padding:42px 0;border-block:1px solid var(--line)}
.band-in{display:flex;flex-wrap:wrap;gap:8px 28px;align-items:center;justify-content:space-between}
.band p{color:var(--slate);font-weight:500;font-size:18px}
.band strong{font-size:20px}

/* sections */
.sec{padding:110px 0}
.sec-soft{background:var(--mist)}
.sec-dark{background:var(--night);color:#fff;position:relative;overflow:hidden}
.sec-head{max-width:680px;margin-bottom:56px}
.eyebrow{display:inline-block;color:var(--blue);font-weight:800;font-size:13px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:14px}
.sec-dark .eyebrow{color:var(--cyan)}
h2{font-size:clamp(28px,3.6vw,42px);line-height:1.15;font-weight:800;letter-spacing:-.02em}
h3{font-size:19px;line-height:1.3;font-weight:700;margin-bottom:8px}
.muted{color:var(--slate);font-size:18px;margin:18px 0 30px;max-width:480px}
.muted-l{color:#b8c6e6;font-size:18px;margin:18px 0 26px;max-width:460px}

.sec-videos{background:var(--night-d);color:#fff}
.sec-videos .eyebrow{color:var(--cyan)}
.vids{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:center}
.vid{margin:0;background:var(--night);border:1px solid rgba(255,255,255,.1);border-radius:22px;overflow:hidden;box-shadow:0 40px 80px -30px rgba(0,0,0,.7)}
.vid video{display:block;width:100%;background:#000}
.vid-tall{width:320px;max-width:100%}
.vid-tall video{aspect-ratio:9/16}
.vid figcaption{padding:14px 18px;color:#b8c6e6;font-size:14px}
.vid figcaption b{color:#fff}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px;transition:transform .3s var(--ease),box-shadow .3s,border-color .3s}
.card:hover{transform:translateY(-6px);box-shadow:0 24px 50px -24px rgba(11,27,63,.35);border-color:rgba(31,94,255,.4)}
.card p{color:var(--slate);font-size:16px}
.ico{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,rgba(31,94,255,.12),rgba(0,194,224,.16));display:grid;place-items:center;margin-bottom:20px}
.ico svg{width:26px;height:26px;fill:none;stroke:var(--blue);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;position:relative}
.steps li{padding:30px;border-radius:var(--r);background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1)}
.steps p{color:#b8c6e6}
.num{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--blue);font-weight:800;margin-bottom:18px;box-shadow:0 0 0 6px rgba(31,94,255,.25)}

.split{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.kpis{display:flex;gap:34px}
.kpis b{display:block;font-size:40px;font-weight:800;color:var(--blue);line-height:1.1}
.kpis span{font-size:14px;color:var(--slate)}
.chart{background:#fff;border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:0 30px 60px -30px rgba(11,27,63,.3)}
.chart-top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:22px}
.chart-top span{color:var(--slate);font-size:13px}
.bars{display:flex;align-items:flex-end;gap:12px;height:220px}
.bars button{flex:1;height:100%;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:8px;background:none;border:0;cursor:pointer;font-weight:600;font-size:13px;color:var(--slate)}
.bars i{display:block;width:100%;height:0;border-radius:10px 10px 4px 4px;background:linear-gradient(180deg,var(--blue),#5b8cff);transition:height 1s var(--ease),filter .2s,opacity .2s}
.chart.in .bars i{height:var(--h)}
.bars .warn i{background:linear-gradient(180deg,var(--cyan),#5ce3f5)}
.bars button:hover i{filter:brightness(1.12)}
.bars.has-sel button:not(.sel) i{opacity:.28}
.chart-foot{margin-top:18px;padding:12px 16px;background:var(--mist);border-radius:12px;font-size:14px;color:var(--slate);min-height:46px;font-weight:500}

.secu{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.secu li{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;font-weight:700;display:flex;gap:12px;align-items:flex-start}
.secu li::before{content:"";flex:none;width:22px;height:22px;border-radius:50%;background:var(--cyan) no-repeat center/12px url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 13l4 4L19 7' fill='none' stroke='%230B1B3F' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}

.contact .g1{top:auto;bottom:-260px;right:-120px;opacity:.35}
.contact .split{position:relative;align-items:start}
.slogan{color:var(--cyan-l);font-weight:700}
.form{background:#fff;color:var(--night);border-radius:24px;padding:34px;display:grid;gap:16px;box-shadow:0 40px 80px -30px rgba(0,0,0,.6)}
.form label{display:grid;gap:6px;font-size:14px;font-weight:700}
.form input,.form select,.form textarea{font-weight:500;font-size:16px;color:var(--night);padding:13px 15px;border:1.5px solid var(--line);border-radius:12px;background:var(--mist);transition:border-color .2s,box-shadow .2s;width:100%}
.form input:focus,.form select:focus,.form textarea:focus{outline:0;border-color:var(--blue);box-shadow:0 0 0 4px rgba(31,94,255,.15);background:#fff}
.form .invalid{border-color:#e5484d}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form .btn{justify-content:center}
.form-note{font-size:14px;color:var(--slate);min-height:20px}

.foot{background:var(--night-d);color:#8fa2c9;padding:34px 0;font-size:14px}
.foot-in{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center}

/* reveal */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease);transition-delay:var(--d,0s)}
.reveal.in{opacity:1;transform:none}

@media (max-width:960px){
  .hero{padding:120px 0 80px}
  .hero-in,.split{grid-template-columns:1fr;gap:50px}
  .vids{grid-template-columns:1fr;justify-items:center}
  .grid,.steps{grid-template-columns:1fr 1fr}
  .secu{grid-template-columns:1fr 1fr}
  .sec{padding:80px 0}
  .burger{display:block}
  .links{position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:rgba(7,18,48,.97);padding:10px 20px 24px;display:none}
  .links.open{display:flex}
  .links a{padding:14px 0;border-bottom:1px solid rgba(255,255,255,.08)}
  .links .btn{margin-top:14px;justify-content:center;border:0}
}
@media (max-width:620px){
  .grid,.steps,.secu,.row{grid-template-columns:1fr}
  .kpis{gap:22px}.kpis b{font-size:32px}
  .f1{left:0}.f2{right:0}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  .chart .bars i{height:var(--h)}
}

/* video (single) */
.vids{grid-template-columns:minmax(0,1fr) 320px;gap:60px}
.vids .muted-l{margin-bottom:28px}

/* app screenshots (voir app-mock.css) */
.shots{position:relative}
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.tabs button{background:#fff;border:1px solid var(--line);color:var(--slate);font-weight:700;font-size:15px;padding:11px 20px;border-radius:999px;cursor:pointer;transition:.2s}
.tabs button:hover{border-color:var(--blue);color:var(--blue)}
.tabs button[aria-selected=true]{background:var(--night);border-color:var(--night);color:#fff}
.win-bar{display:flex;align-items:center;gap:7px;padding:12px 16px;border-bottom:1px solid var(--line)}
.win-bar i{width:11px;height:11px;border-radius:50%}
.win-bar span{margin-left:14px;font-size:12px;padding:3px 16px;border-radius:99px}
@keyframes paneIn{from{opacity:0;transform:translateY(8px)}}
.shots-note{margin-top:14px;text-align:center;font-size:13px;color:var(--slate)}

@media (max-width:960px){
  .vids{grid-template-columns:1fr;justify-items:center;gap:40px}
  .vids>div:first-child{justify-self:stretch}
}
@media (max-width:620px){
}

/* ================= glass + motion layer ================= */
.progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:60;background:linear-gradient(90deg,var(--blue),var(--cyan-l));transform-origin:left;transform:scaleX(0)}

/* floating glass nav */
.nav-in{gap:18px}
.glass-bar{transition:background .35s,margin .35s,height .35s,border-radius .35s,padding .35s,box-shadow .35s,border-color .35s;border:1px solid transparent}
.nav.stuck{background:none;box-shadow:none}
.nav.stuck .glass-bar{background:rgba(11,27,63,.5);backdrop-filter:blur(20px) saturate(170%);-webkit-backdrop-filter:blur(20px) saturate(170%);border-color:rgba(255,255,255,.14);border-radius:999px;margin-top:10px;height:60px;padding:0 12px 0 22px;box-shadow:0 14px 40px -16px rgba(0,0,0,.6),inset 0 1px 0 rgba(255,255,255,.12)}
.nav.stuck .glass-bar{width:min(1160px,100% - 24px)}

/* language switch */
.lang{position:relative;display:inline-grid;grid-template-columns:repeat(3,44px);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(12px);border-radius:999px;padding:3px;flex:none}
.lang button{position:relative;z-index:1;background:none;border:0;color:#cdd7ee;font-weight:800;font-size:12.5px;letter-spacing:.06em;height:30px;border-radius:999px;cursor:pointer;transition:color .25s}
.lang button[aria-pressed=true]{color:var(--night)}
.lang button:hover:not([aria-pressed=true]){color:#fff}
.lang-pill{position:absolute;top:3px;left:3px;width:44px;height:30px;border-radius:999px;background:linear-gradient(135deg,#fff,#cfe9ff);box-shadow:0 4px 14px -4px rgba(0,229,255,.7);transition:transform .45s cubic-bezier(.3,1.4,.5,1)}
.lang[data-active=en] .lang-pill{transform:translateX(44px)}
.lang[data-active=vi] .lang-pill{transform:translateX(88px)}

/* glass surfaces */
.glass-light{background:rgba(255,255,255,.62);backdrop-filter:blur(22px) saturate(170%);-webkit-backdrop-filter:blur(22px) saturate(170%);border:1px solid rgba(255,255,255,.75);box-shadow:0 30px 70px -34px rgba(11,27,63,.5),inset 0 1px 0 rgba(255,255,255,.9)}
.glass-dark{background:linear-gradient(145deg,rgba(255,255,255,.1),rgba(255,255,255,.03));backdrop-filter:blur(22px) saturate(160%);-webkit-backdrop-filter:blur(22px) saturate(160%);border:1px solid rgba(255,255,255,.16);box-shadow:0 30px 70px -30px rgba(0,0,0,.65),inset 0 1px 0 rgba(255,255,255,.18)}
.glass{box-shadow:0 20px 50px -20px rgba(0,0,0,.6),inset 0 1px 0 rgba(255,255,255,.25)}
.glass-form{background:rgba(255,255,255,.84);backdrop-filter:blur(24px) saturate(170%);-webkit-backdrop-filter:blur(24px) saturate(170%);border:1px solid rgba(255,255,255,.6);box-shadow:0 40px 90px -30px rgba(0,0,0,.65),inset 0 1px 0 #fff}
.phone.glass-light{background:rgba(255,255,255,.9)}
.win.glass-light{background:rgba(255,255,255,.72)}
.win .side{backdrop-filter:none}
.card{background:rgba(255,255,255,.7);backdrop-filter:blur(14px)}
.btn-ghost{backdrop-filter:blur(12px)}

/* button sheen */
.btn{position:relative;overflow:hidden;isolation:isolate}
.btn::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(110deg,transparent 30%,rgba(255,255,255,.35) 50%,transparent 70%);transform:translateX(-130%)}
.btn:hover::after{transform:translateX(130%);transition:transform .8s}

/* spotlight on cards */
.spot{position:relative;overflow:hidden}
.spot::after{content:"";position:absolute;inset:0;border-radius:inherit;background:radial-gradient(280px circle at var(--mx,50%) var(--my,50%),rgba(31,94,255,.18),rgba(0,194,224,.08) 45%,transparent 70%);opacity:0;transition:opacity .3s;pointer-events:none}
.spot:hover::after{opacity:1}
.card .ico{transition:transform .4s cubic-bezier(.3,1.5,.5,1)}
.card:hover .ico{transform:rotate(-8deg) scale(1.12)}

/* aurora blobs (light sections) */
.aurora{position:relative;overflow:hidden}
.rel{position:relative;z-index:1}
.blob{position:absolute;border-radius:50%;filter:blur(80px);pointer-events:none;opacity:.5;animation:drift 16s ease-in-out infinite alternate}
.b1{width:480px;height:480px;background:rgba(31,94,255,.35);top:-120px;left:-120px}
.b2{width:420px;height:420px;background:rgba(0,194,224,.38);bottom:-140px;right:-100px;animation-duration:20s;animation-direction:alternate-reverse}
.b3{width:340px;height:340px;background:rgba(120,140,255,.32);top:30%;right:20%;animation-duration:24s}
.sec-videos,.sec-dark{position:relative;overflow:hidden}
.sec-videos .glow.g1{top:-180px;right:auto;left:-120px}
.sec-videos .glow.g2{bottom:-200px;left:auto;right:-100px}
.sec-videos .wrap,.sec-dark .wrap{position:relative;z-index:1}

/* hero: parallax glows + 3D tilt + shimmer */
.g3{width:300px;height:300px;background:#4d7bff;top:38%;left:40%;opacity:.22;animation:drift 12s ease-in-out infinite alternate}
.hero .glow{translate:var(--px,0) var(--py,0);transition:translate .4s ease-out}
.hero-vis{perspective:1200px}
.hero-vis.reveal.in{transform:rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));transition:opacity .8s,transform .25s ease-out}
.grad{background-size:220% 100%;animation:shimmer 6s linear infinite}
@keyframes shimmer{to{background-position:-220% 0}}
.pill{position:relative;overflow:hidden}
.pill::after{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 35%,rgba(255,255,255,.35) 50%,transparent 65%);transform:translateX(-130%);animation:sweep 5s ease-in-out infinite 1.5s}
@keyframes sweep{40%,100%{transform:translateX(130%)}}

/* marquee */
.marquee{background:linear-gradient(90deg,var(--night),#10286b,var(--night));overflow:hidden;border-block:1px solid rgba(255,255,255,.08);padding:16px 0}
.marquee-track{display:flex;align-items:center;gap:30px;width:max-content;animation:mq 38s linear infinite;color:#cdd7ee;font-weight:700;font-size:15px;letter-spacing:.02em;white-space:nowrap}
.marquee-track i{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes mq{to{transform:translateX(-50%)}}

.vid-note{margin-top:18px;font-size:13px;color:#8fa2c9}
.vid-note:empty{display:none}
.num{animation:ring 3.2s ease-in-out infinite}
@keyframes ring{50%{box-shadow:0 0 0 12px rgba(31,94,255,0)}}
.steps li:hover{transform:translateY(-6px);transition:transform .3s var(--ease)}
.secu li{transition:transform .3s var(--ease)}
.secu li:hover{transform:translateY(-5px)}

/* nav on tablets: burger earlier (EN/VI labels are longer) */
@media (max-width:1100px){
  .burger{display:block;margin-left:-6px}
  .lang{margin-left:auto}
  .links{position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:rgba(7,18,48,.92);backdrop-filter:blur(20px);padding:10px 20px 24px;display:none}
  .links.open{display:flex}
  .links a{padding:14px 0;border-bottom:1px solid rgba(255,255,255,.08)}
  .links .btn{margin-top:14px;justify-content:center;border:0}
}
@media (max-width:620px){
  .lang{grid-template-columns:repeat(3,38px)}
  .lang-pill{width:38px}
  .lang[data-active=en] .lang-pill{transform:translateX(38px)}
  .lang[data-active=vi] .lang-pill{transform:translateX(76px)}
  .nav.stuck .glass-bar{padding:0 8px 0 14px}
  .brand img{height:28px}
}
@media (prefers-reduced-motion:reduce){
  .marquee-track,.blob,.grad,.pill::after{animation:none!important}
}
.f1{left:-56px!important}.f2{right:-40px!important}
@media (max-width:620px){.f1{left:-6px!important}.f2{right:-6px!important}}

/* ===== drapeaux + surbrillance de navigation ===== */
.lang{--lw:62px;grid-template-columns:repeat(3,var(--lw))}
.lang-pill{width:var(--lw)}
.lang[data-active=en] .lang-pill{transform:translateX(var(--lw))}
.lang[data-active=vi] .lang-pill{transform:translateX(calc(var(--lw) * 2))}
.lang button{display:inline-flex;align-items:center;justify-content:center;gap:7px}
.flag{width:20px;height:20px;border-radius:50%;flex:none;box-shadow:0 0 0 1px rgba(255,255,255,.4),0 2px 6px rgba(0,0,0,.35);transition:transform .35s cubic-bezier(.3,1.5,.5,1)}
.lang button:hover .flag{transform:scale(1.18) rotate(-6deg)}
.lang button[aria-pressed=true] .flag{box-shadow:0 0 0 1px rgba(11,27,63,.25),0 2px 6px rgba(11,27,63,.3)}

.links{position:relative}
.links a{position:relative;z-index:1;transition:color .3s}
.links a.active:not(.btn){color:#fff}
.nav-pill{position:absolute;z-index:0;top:0;left:0;height:30px;width:0;border-radius:999px;pointer-events:none;opacity:0;
  background:linear-gradient(135deg,rgba(31,94,255,.9),rgba(0,194,224,.7));
  box-shadow:0 6px 22px -6px rgba(31,94,255,.9),inset 0 1px 0 rgba(255,255,255,.35);
  backdrop-filter:blur(8px);
  transition:left .55s cubic-bezier(.3,1.3,.5,1),width .55s cubic-bezier(.3,1.3,.5,1),top .4s,height .4s,opacity .3s}
.nav-pill.on{opacity:1}

@media (max-width:1100px){
  .nav-pill{display:none}
  .links a.active:not(.btn){color:var(--cyan-l)}
}
@media (max-width:620px){
  .lang{--lw:42px}
  .lang button span{display:none}
  .flag{width:22px;height:22px}
}