@font-face{font-family:"Be Vietnam Pro";src:url("fonts/be-vietnam-pro-regular.ttf") format("truetype");font-weight:400;font-display:swap}
@font-face{font-family:"Be Vietnam Pro";src:url("fonts/be-vietnam-pro-semibold.ttf") format("truetype");font-weight:600;font-display:swap}
@font-face{font-family:"Be Vietnam Pro";src:url("fonts/be-vietnam-pro-bold.ttf") format("truetype");font-weight:700;font-display:swap}
:root{--bg:#050913;--surface:#0a1120;--surface-2:#0d1728;--line:rgba(133,171,218,.16);--line-strong:rgba(99,181,255,.34);--text:#f5f8fc;--muted:#8996aa;--blue:#318cff;--cyan:#4be1ff;--green:#53e6ab}
*{box-sizing:border-box}
html{min-width:320px;scroll-behavior:smooth}
body{margin:0;min-height:100vh;overflow-x:hidden;color:var(--text);background:var(--bg);font-family:"Be Vietnam Pro",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit}.tech-page{position:relative;isolation:isolate}.tech-grid{position:fixed;inset:0;z-index:-3;pointer-events:none;background-image:linear-gradient(rgba(99,181,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(99,181,255,.045) 1px,transparent 1px);background-size:56px 56px;mask-image:linear-gradient(to bottom,#000,transparent 82%)}
.tech-glow{position:fixed;z-index:-2;width:42vw;height:42vw;border-radius:50%;pointer-events:none;filter:blur(1px);opacity:.2;animation:glow-drift 14s ease-in-out infinite alternate}.tech-glow-a{top:-24vw;right:-8vw;background:radial-gradient(circle,var(--blue),transparent 67%)}.tech-glow-b{bottom:-30vw;left:-15vw;background:radial-gradient(circle,var(--cyan),transparent 68%);animation-delay:-6s}
.site-header{width:min(1200px,calc(100% - 48px));height:86px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}
.brand{display:inline-flex;align-items:center;gap:12px;color:#fff;font-size:12px;font-weight:700;letter-spacing:.09em;text-decoration:none}.brand img{width:54px;height:54px;object-fit:contain}.header-actions,.brand-links{display:flex;align-items:center}.header-actions{gap:22px}.brand-links{gap:18px}.text-link,.back-link{color:var(--muted);font-size:12px;font-weight:600;text-decoration:none;transition:color .15s}.text-link:hover,.back-link:hover{color:var(--cyan)}
.button{min-height:52px;padding:0 23px;display:inline-flex;align-items:center;justify-content:center;gap:14px;color:#fff;background:var(--blue);border:1px solid #69adff;border-radius:8px;font-size:13px;font-weight:700;text-decoration:none;transition:background-color .15s,border-color .15s}.button:hover{background:#1679ee;border-color:#8bc0ff}.button-small{min-height:42px;padding:0 18px}
.zalo-button{min-height:42px;padding:0 16px;display:inline-flex;align-items:center;gap:9px;color:#bdf6ff;background:rgba(75,225,255,.09);border:1px solid rgba(75,225,255,.52);border-radius:8px;font-size:11px;font-weight:700;letter-spacing:.02em;text-decoration:none;box-shadow:inset 0 0 18px rgba(75,225,255,.04),0 0 22px rgba(75,225,255,.08);transition:color .18s,background-color .18s,border-color .18s,box-shadow .18s}.zalo-button:hover{color:#fff;background:rgba(75,225,255,.16);border-color:var(--cyan);box-shadow:inset 0 0 22px rgba(75,225,255,.08),0 0 28px rgba(75,225,255,.18)}.zalo-pulse{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 0 rgba(75,225,255,.55);animation:zalo-pulse 2s ease-out infinite}
.landing-main{width:min(1200px,calc(100% - 48px));margin:auto;padding:110px 0 96px}.hero-copy{max-width:900px;animation:fade-up .65s ease both}.system-label,.card-code,.screen-index,.stage-bar{font-size:10px;font-weight:600;letter-spacing:.14em;text-transform:uppercase}.system-label{display:flex;align-items:center;gap:9px;color:var(--cyan)}.system-label span,.status span,.stage-status i,.security-note i{width:7px;height:7px;display:inline-block;border-radius:50%;background:var(--green);box-shadow:0 0 14px rgba(83,230,171,.7)}
.hero-copy h1,.preview-copy h1{margin:22px 0 18px;font-size:clamp(48px,7.2vw,92px);font-weight:600;line-height:1.03;letter-spacing:-.065em}.hero-copy h1 em,.preview-copy h1 em{color:#78869b;font-style:normal}.hero-copy p,.preview-copy p{max-width:610px;margin:0;color:var(--muted);font-size:15px;line-height:1.75}.hero-actions{margin-top:30px;display:flex;align-items:center;gap:22px;flex-wrap:wrap}.security-note{display:flex;align-items:center;gap:8px;color:#78869b;font-size:11px}.security-note i{width:5px;height:5px}
.product-stage{position:relative;margin-top:76px;padding:10px;background:rgba(10,17,32,.82);border:1px solid var(--line-strong);border-radius:14px;box-shadow:0 40px 100px rgba(0,0,0,.36);animation:fade-up .8s .1s ease both}.stage-bar{height:36px;padding:0 8px;display:flex;align-items:center;justify-content:space-between;color:#637087}.stage-status{display:flex;align-items:center;gap:8px;color:#96a4b7}.stage-status i{width:6px;height:6px}.primary-screen{margin:0;overflow:hidden;border:1px solid var(--line);border-radius:8px;background:#101827}.primary-screen img{width:100%;height:auto;display:block}.stage-metric{position:absolute;min-width:154px;padding:12px 14px;background:rgba(7,13,25,.94);border:1px solid var(--line-strong);border-radius:8px;box-shadow:0 14px 35px rgba(0,0,0,.4)}.stage-metric strong,.stage-metric span{display:block}.stage-metric strong{color:var(--cyan);font-size:12px}.stage-metric span{margin-top:3px;color:var(--muted);font-size:9px;text-transform:uppercase;letter-spacing:.08em}.metric-a{top:25%;left:-28px}.metric-b{right:-24px;bottom:13%}
.product-showcase{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;margin-top:70px}.screen-card{min-width:0;margin:0;padding:10px;background:rgba(10,17,32,.72);border:1px solid var(--line);border-radius:12px}.screen-index{padding:5px 4px 13px;color:#647187}.screen-card img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:7px}.screen-card figcaption{padding:14px 4px 5px;color:#c8d2df;font-size:12px;font-weight:600}.site-footer{width:min(1200px,calc(100% - 48px));margin:auto;padding:28px 0 36px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-top:1px solid var(--line);color:#596679;font-size:10px;letter-spacing:.08em;text-transform:uppercase}.footer-links{display:flex;align-items:center;gap:20px}.footer-links a{color:#68768a;text-decoration:none;transition:color .15s}.footer-links a:hover{color:var(--cyan)}
.login-shell{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(400px,.85fr)}.login-preview{position:relative;min-width:0;padding:34px clamp(28px,5vw,76px) 46px;display:flex;flex-direction:column;border-right:1px solid var(--line)}.preview-copy{max-width:720px;margin:auto 0;padding:70px 0 44px}.preview-copy h1{font-size:clamp(42px,5.2vw,72px)}.login-screen{width:min(680px,100%);margin:0;padding:8px;background:rgba(10,17,32,.8);border:1px solid var(--line);border-radius:11px;box-shadow:0 28px 70px rgba(0,0,0,.3)}.login-screen img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:6px}.login-panel{display:grid;place-items:center;padding:40px}.login-card{width:min(100%,430px);padding:34px;background:rgba(10,17,32,.78);border:1px solid var(--line-strong);border-radius:14px;box-shadow:0 28px 80px rgba(0,0,0,.3);backdrop-filter:blur(18px)}.card-code{color:var(--cyan)}.login-card h2{margin:24px 0 10px;font-size:34px;line-height:1.15;letter-spacing:-.045em}.card-copy{margin:0;color:var(--muted);font-size:13px}.status{margin-top:18px;display:flex;align-items:center;gap:9px;color:#718096;font-size:10px;text-transform:uppercase;letter-spacing:.08em}.status span{width:6px;height:6px}.status.loading span{background:var(--cyan);box-shadow:0 0 14px rgba(75,225,255,.75);animation:pulse 1s infinite}.login-actions{margin-top:28px}.google-button{width:100%;min-height:56px;padding:0 15px;display:grid;grid-template-columns:30px 1fr 30px;align-items:center;color:#fff;background:var(--blue);border:1px solid #69adff;border-radius:8px;font:600 13px inherit;cursor:pointer;transition:background-color .15s,border-color .15s}.google-button:hover{background:#1679ee;border-color:#9ac8ff}.google-button:disabled{opacity:.58;cursor:wait}.google-logo{width:28px;height:28px;display:grid;place-items:center;background:#fff;border-radius:6px}.button-arrow{font-size:17px}.error{display:none;margin-top:14px;padding:12px 13px;color:#ffb4b4;background:rgba(220,38,38,.1);border:1px solid rgba(248,113,113,.3);border-radius:7px;font-size:11px;line-height:1.55}.back-link{display:block;margin-top:22px;text-align:center}.auth-footer{margin-top:28px;padding-top:16px;display:flex;justify-content:space-between;gap:12px;border-top:1px solid var(--line);color:#566276;font-size:8px;letter-spacing:.09em;text-transform:uppercase}
@keyframes fade-up{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}@keyframes glow-drift{to{transform:translate3d(5%,4%,0) scale(1.08)}}@keyframes pulse{50%{opacity:.35}}
@media(max-width:900px){.landing-main{padding-top:76px}.stage-metric{display:none}.login-shell{grid-template-columns:1fr}.login-preview{min-height:auto;border-right:0;border-bottom:1px solid var(--line)}.preview-copy{padding:64px 0 36px}.login-screen{display:none}.login-panel{padding:60px 24px 72px}}
@media(max-width:760px){.brand-links{display:none}}
@media(max-width:640px){.site-header,.landing-main,.site-footer{width:calc(100% - 32px)}.site-header{height:74px}.brand img{width:46px;height:46px}.brand span{display:none}.header-actions{gap:10px}.text-link{font-size:10px}.zalo-button{min-height:38px;padding:0 11px;font-size:10px}.button-small{min-height:38px;padding:0 13px}.landing-main{padding:58px 0 68px}.hero-copy h1{font-size:clamp(39px,12vw,56px)}.hero-copy p{font-size:13px}.hero-actions{align-items:stretch;flex-direction:column}.hero-actions .button{width:100%}.security-note{justify-content:center}.product-stage{margin-top:50px;padding:6px}.product-showcase{grid-template-columns:1fr;margin-top:38px}.site-footer{align-items:flex-start;gap:16px;flex-direction:column}.footer-links{align-items:flex-start;gap:10px;flex-direction:column}.login-preview{padding:24px 20px 36px}.preview-copy{padding:56px 0 16px}.preview-copy h1{font-size:40px}.preview-copy p{font-size:13px}.login-panel{padding:36px 16px 54px}.login-card{padding:26px 20px}.login-card h2{font-size:30px}.tech-grid{background-size:38px 38px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.tech-glow,.hero-copy,.product-stage,.status.loading span{animation:none!important}}

/* Long-form product story */
.landing-page .site-header{position:absolute;top:0;right:0;left:0;z-index:20}
.story-scroll{width:100%}.story-scene{position:relative;min-height:92vh;overflow:hidden;display:flex;align-items:center;padding:140px max(24px,calc((100vw - 1200px)/2)) 90px;border-bottom:1px solid var(--line);isolation:isolate}.story-scene:nth-child(even){background:#070c17}.story-scene:nth-child(odd){background:#050913}
.scene-visual{position:absolute;z-index:-2;inset:8% -4% 8% 34%;background-image:var(--scene);background-position:center;background-repeat:no-repeat;background-size:cover;border:1px solid rgba(121,175,232,.24);border-radius:16px;opacity:0;filter:saturate(.68) contrast(.9) blur(2px);transform:translateX(42px) scale(1.045);transition:opacity .9s ease,transform 1.2s cubic-bezier(.22,1,.36,1),filter 1s ease;mask-image:linear-gradient(90deg,transparent 0%,rgba(0,0,0,.32) 15%,#000 48%,#000 88%,transparent 100%);-webkit-mask-image:linear-gradient(90deg,transparent 0%,rgba(0,0,0,.32) 15%,#000 48%,#000 88%,transparent 100%)}
.scene-visual:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,#050913 0%,rgba(5,9,19,.72) 24%,transparent 62%),linear-gradient(0deg,rgba(5,9,19,.56),transparent 32%)}
.scene-right{justify-content:flex-end}.scene-right .scene-copy{text-align:right;align-items:flex-end}.scene-right .system-label{justify-content:flex-end}.scene-right .scene-visual{right:34%;left:-4%;transform:translateX(-42px) scale(1.045);mask-image:linear-gradient(90deg,transparent,#000 12%,#000 55%,rgba(0,0,0,.3) 84%,transparent);-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 55%,rgba(0,0,0,.3) 84%,transparent)}.scene-right .scene-visual:after{background:linear-gradient(270deg,#070c17 0%,rgba(7,12,23,.72) 24%,transparent 62%),linear-gradient(0deg,rgba(7,12,23,.5),transparent 32%)}
.scene-copy{width:min(610px,54vw);display:flex;flex-direction:column;align-items:flex-start}.scene-copy h1,.scene-copy h2{margin:22px 0 18px;font-weight:600;line-height:1.04;letter-spacing:-.06em}.scene-copy h1{font-size:clamp(52px,7vw,94px)}.scene-copy h2{font-size:clamp(44px,5.7vw,76px)}.scene-copy h1 em,.scene-copy h2 em{color:#718098;font-style:normal}.scene-copy p{max-width:500px;margin:0;color:#9aa7ba;font-size:14px;line-height:1.75}.scene-number{position:absolute;right:max(24px,calc((100vw - 1200px)/2));bottom:28px;color:#4f5c70;font-size:9px;font-weight:600;letter-spacing:.14em;opacity:.3;transition:opacity .7s .25s}.scene-right .scene-number{right:auto;left:max(24px,calc((100vw - 1200px)/2))}.scene-cta{margin-top:28px}.reveal{opacity:0;transform:translateY(28px);transition:opacity .72s .12s ease,transform .85s .12s cubic-bezier(.22,1,.36,1)}.scene-right .reveal{transform:translateY(28px)}.reveal.is-visible{opacity:1;transform:none}.story-scene.is-active .scene-visual{opacity:.5;filter:saturate(.78) contrast(.94) blur(0);transform:translateX(0) scale(1)}.story-scene.is-active .scene-number{opacity:1}.story-scene:after{content:"";position:absolute;z-index:3;top:8%;bottom:8%;left:-25%;width:18%;pointer-events:none;background:linear-gradient(90deg,transparent,rgba(109,218,255,.09),transparent);transform:skewX(-12deg);opacity:0}.story-scene.is-active:after{animation:scene-scan 1.15s .18s ease-out both}
.story-hero{min-height:100vh;padding-top:160px}.story-hero .scene-visual{inset:12% -5% 7% 29%}.story-hero.is-active .scene-visual{opacity:.56}.story-hero .scene-copy{width:min(720px,60vw)}

/* Login uses the product image as a quiet backdrop, not another dense card. */
.login-preview{isolation:isolate;overflow:hidden}.login-preview:before{content:"";position:absolute;z-index:-2;inset:18% -18% -6% 24%;background:url("landing/progress-dashboard.jpg") center/cover no-repeat;opacity:.2;filter:saturate(.74) contrast(.92);mask-image:linear-gradient(115deg,transparent 0%,#000 30%,#000 82%,transparent);-webkit-mask-image:linear-gradient(115deg,transparent 0%,#000 30%,#000 82%,transparent)}.login-preview:after{content:"";position:absolute;z-index:-1;inset:0;background:linear-gradient(120deg,#050913 9%,rgba(5,9,19,.85) 45%,rgba(5,9,19,.28))}.login-screen{display:none}.preview-copy{margin:auto 0}

@media(max-width:900px){.story-scene,.story-hero{min-height:78vh;padding-top:120px;padding-bottom:70px}.scene-copy,.story-hero .scene-copy{width:min(650px,78vw)}.scene-visual,.story-hero .scene-visual{inset:16% -22% 8% 20%}.story-scene.is-active .scene-visual,.story-hero.is-active .scene-visual{opacity:.36}.scene-right .scene-visual{right:20%;left:-22%}.login-preview:before{inset:12% -30% -5% 18%;opacity:.14}}
@media(max-width:640px){.story-scene,.story-hero{min-height:76vh;padding:110px 20px 62px;align-items:flex-end}.scene-copy,.story-hero .scene-copy{width:100%}.scene-right{justify-content:flex-start}.scene-right .scene-copy{text-align:left;align-items:flex-start}.scene-right .system-label{justify-content:flex-start}.scene-copy h1{font-size:48px}.scene-copy h2{font-size:43px}.scene-visual,.story-hero .scene-visual,.scene-right .scene-visual{inset:10% -40% 22% -22%;mask-image:linear-gradient(to bottom,#000 0%,#000 48%,transparent 100%);-webkit-mask-image:linear-gradient(to bottom,#000 0%,#000 48%,transparent 100%)}.story-scene.is-active .scene-visual,.story-hero.is-active .scene-visual{opacity:.4}.scene-visual:after,.scene-right .scene-visual:after{background:linear-gradient(0deg,#050913 0%,rgba(5,9,19,.72) 35%,transparent 72%)}.scene-number,.scene-right .scene-number{right:20px;bottom:20px;left:auto}.story-hero .hero-actions{width:100%}.story-hero .hero-actions .button{width:100%}.login-preview:before{inset:16% -55% -8% -8%}}
@keyframes scene-scan{0%{left:-25%;opacity:0}20%{opacity:1}100%{left:115%;opacity:0}}@keyframes zalo-pulse{70%{box-shadow:0 0 0 8px rgba(75,225,255,0)}100%{box-shadow:0 0 0 0 rgba(75,225,255,0)}}
@media(prefers-reduced-motion:reduce){.reveal,.scene-visual,.scene-number{opacity:1;transform:none;filter:none;transition:none}.story-scene:after,.zalo-pulse{animation:none!important}}