/* FPT PolySchool — landing tuyển sinh giáo dục (demo by vPage.vn) */
:root{
  --c:#1d4ed8;        /* xanh dương FPT chủ đạo */
  --c2:#3b82f6;       /* xanh gradient */
  --c-deep:#1e3a8a;   /* xanh đậm (chữ tương phản) */
  --accent:#f59e0b;   /* cam nhấn FPT */
  --soft:#eff6ff;     /* nền xanh nhạt */
  --ink:#1b2230;--bg:#ffffff;--bg2:#f7faff;
  --line:#dde8f7;--muted:#5a6376;
  --r:16px;--rl:24px;--maxw:1180px;
  --sh:0 22px 54px rgba(20,50,120,.13);--sh-xs:0 1px 3px rgba(20,50,120,.06);
  --glow:0 14px 32px rgba(29,78,216,.32);
  --grad:linear-gradient(135deg,var(--c),var(--c2));
  --fh:"Sora",system-ui,sans-serif;--ff:"Be Vietnam Pro",system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:var(--ff);background:var(--bg);color:var(--ink);line-height:1.78;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}a{text-decoration:none;color:inherit}ul{list-style:none}
h1,h2,h3{font-family:var(--fh);font-weight:700;line-height:1.14;letter-spacing:-.02em;color:var(--ink)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 26px}
.section{padding:100px 0;position:relative}
.sec-soft{background:var(--bg2)}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--c-deep);background:var(--soft);border:1px solid var(--line);padding:6px 14px;border-radius:999px;margin-bottom:18px}
.eyebrow-light{color:#fff;background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.3)}
.head{text-align:center;max-width:660px;margin:0 auto 56px}
.head h2{font-size:clamp(30px,4.4vw,46px);margin-bottom:14px}.head p{color:var(--muted);font-size:17px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:600;font-size:15px;padding:14px 28px;border-radius:12px;border:none;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s,color .2s}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--glow)}.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--c-deep);border:1px solid var(--line)}.btn-ghost:hover{border-color:var(--c);transform:translateY(-2px)}
.btn-block{width:100%;margin-top:6px}

.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}.reveal.in{opacity:1;transform:none}

/* header */
.header{position:sticky;top:0;z-index:100;backdrop-filter:saturate(160%) blur(12px);background:rgba(255,255,255,.85);border-bottom:1px solid transparent;transition:.3s}
.header.scrolled{border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(20,50,120,.08)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--fh);font-weight:800;font-size:20px;color:var(--ink)}
.brand .dot{height:40px;padding:0 11px;border-radius:11px;background:var(--grad);display:grid;place-items:center;font-size:15px;font-weight:800;color:#fff;letter-spacing:.04em;box-shadow:var(--glow)}
.brand-txt{display:flex;flex-direction:column;line-height:1}
.brand-txt small{font-family:var(--ff);font-weight:600;font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--c);margin-top:3px}
.menu{display:flex;align-items:center;gap:28px}.menu a{color:var(--muted);font-weight:600;font-size:15px;transition:color .2s}.menu a:hover{color:var(--c)}
.nav-r{display:flex;align-items:center;gap:12px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}.burger span{width:24px;height:2px;background:var(--ink);border-radius:2px}
@media(max-width:980px){.menu{display:none;position:absolute;top:74px;left:18px;right:18px;flex-direction:column;background:#fff;padding:14px 22px;gap:0;border-radius:var(--r);box-shadow:var(--sh)}.menu.open{display:flex}.menu a{padding:13px 0;border-bottom:1px solid var(--line);width:100%}.burger{display:flex}.nav-r .btn{display:none}}

/* hero */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,var(--soft),#fff)}
.hero::before{content:"";position:absolute;width:680px;height:680px;right:-220px;top:-280px;border-radius:50%;background:radial-gradient(circle,rgba(59,130,246,.26),transparent 62%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center;padding:78px 0;position:relative;z-index:2}
.hero h1{font-size:clamp(38px,5.4vw,60px);margin-bottom:20px}
.hero p{font-size:18px;color:var(--muted);max-width:490px;margin-bottom:30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px}
.hero-trust{display:flex;gap:30px;flex-wrap:wrap}
.hero-trust .ht b{font-family:var(--fh);font-size:24px;color:var(--c-deep);display:block;line-height:1}
.hero-trust .ht span{font-size:13px;color:var(--muted)}
.hero-media{position:relative}
.hero-media>img{width:100%;aspect-ratio:4/3.5;object-fit:cover;border-radius:var(--rl);box-shadow:var(--sh)}
.pill{position:absolute;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:var(--sh);padding:12px 16px;display:flex;align-items:center;gap:11px}
.pill .ic{width:40px;height:40px;border-radius:10px;background:var(--soft);display:grid;place-items:center;font-size:20px}
.pill b{display:block;font-size:14px}.pill span{font-size:12px;color:var(--muted)}
.pill-1{bottom:-18px;left:-18px}.pill-2{top:24px;right:-16px}
@media(max-width:980px){.hero-grid{grid-template-columns:1fr;padding:54px 0}.hero-media{max-width:470px;margin:0 auto}.pill-2{right:8px}}

/* badges band */
.badges-band{background:var(--c-deep);padding:18px 0}
.badges{display:flex;flex-wrap:wrap;justify-content:center;gap:14px 34px}
.bd{display:flex;align-items:center;gap:8px;color:#ffeede;font-weight:600;font-size:14.5px}
.bd span{font-size:18px}

/* programs */
.prog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
@media(max-width:900px){.prog-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.prog-grid{grid-template-columns:1fr}}
.prog{background:#fff;border:1px solid var(--line);border-radius:var(--rl);padding:32px 28px;transition:transform .25s,box-shadow .25s,border-color .25s}
.prog:hover{transform:translateY(-7px);box-shadow:var(--sh);border-color:transparent}
.prog .ic{width:60px;height:60px;border-radius:15px;background:var(--soft);display:grid;place-items:center;font-size:28px;margin-bottom:18px}
.prog h3{font-size:20px;margin-bottom:10px}.prog p{color:var(--muted);font-size:14.5px;margin-bottom:14px}
.prog-link{font-weight:700;font-size:14px;color:var(--c)}

/* features (why) */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}@media(max-width:900px){.feat-grid{grid-template-columns:1fr}}
.feat{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px;transition:transform .25s,box-shadow .25s,border-color .25s}
.feat:hover{transform:translateY(-6px);box-shadow:var(--sh);border-color:transparent}
.feat .ic{width:56px;height:56px;border-radius:15px;background:var(--soft);display:grid;place-items:center;font-size:26px;margin-bottom:18px}
.feat h3{font-size:19px;margin-bottom:10px}.feat p{color:var(--muted);font-size:14.5px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:s}
@media(max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}@media(max-width:520px){.steps{grid-template-columns:1fr}}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px 26px;position:relative;counter-increment:s}
.step::after{content:"0" counter(s);position:absolute;top:22px;right:24px;font-family:var(--fh);font-weight:800;font-size:34px;color:var(--soft)}
.step-ic{width:58px;height:58px;border-radius:15px;background:var(--soft);display:grid;place-items:center;font-size:28px;margin-bottom:18px}
.step h3{font-size:18px;margin-bottom:8px}.step p{color:var(--muted);font-size:14.5px}

/* about */
.about{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
@media(max-width:900px){.about{grid-template-columns:1fr;gap:44px}}
.about-media{position:relative}
.about-media>img{width:100%;border-radius:var(--rl);box-shadow:var(--sh);aspect-ratio:4/3.4;object-fit:cover}
.about-badge{position:absolute;bottom:-20px;right:-12px;background:var(--grad);color:#fff;border-radius:18px;padding:18px 24px;box-shadow:var(--glow);text-align:center}
.about-badge b{font-family:var(--fh);font-size:30px;display:block;line-height:1}.about-badge span{font-size:12.5px;opacity:.95}
.about h2{font-size:clamp(28px,4vw,42px);margin-bottom:18px}.about p{color:var(--muted);margin-bottom:14px}
.chk{display:flex;flex-direction:column;gap:13px;margin-top:18px}.chk li{display:flex;align-items:flex-start;gap:11px}.chk svg{color:var(--c);flex-shrink:0;margin-top:3px}

/* testimonials */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}@media(max-width:900px){.testi-grid{grid-template-columns:1fr}}
.testi{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px;box-shadow:var(--sh-xs)}
.testi .stars{color:var(--accent);letter-spacing:2px;margin-bottom:12px}.testi p{margin-bottom:18px}
.testi .who{display:flex;align-items:center;gap:12px}
.testi .av{width:46px;height:46px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:700}
.testi .who b{display:block}.testi .who small{color:var(--muted)}

/* cta + form */
.sec-cta{background:linear-gradient(135deg,var(--c-deep),var(--c));position:relative;overflow:hidden}
.sec-cta::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 20%,rgba(255,255,255,.16),transparent 50%)}
.cta-grid{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
@media(max-width:900px){.cta-grid{grid-template-columns:1fr;gap:36px}}
.cta-info h2{color:#fff;font-size:clamp(28px,3.6vw,40px);margin-bottom:16px}
.cta-info p{color:rgba(255,255,255,.92);font-size:17px;margin-bottom:24px;max-width:460px}
.cta-contact{display:flex;flex-direction:column;gap:12px}
.cta-contact a{color:#fff;font-size:16px;font-weight:500}.cta-contact a b{font-weight:700}
.cta-form{background:#fff;border-radius:var(--rl);padding:34px 30px;box-shadow:0 30px 60px rgba(0,0,0,.22)}
.cta-form h3{font-size:22px;margin-bottom:20px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:7px}
.field input,.field select{width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:11px;font-family:var(--ff);font-size:15px;color:var(--ink);background:#fff;transition:border-color .2s,box-shadow .2s}
.field input:focus,.field select:focus{outline:none;border-color:var(--c);box-shadow:0 0 0 3px rgba(29,78,216,.16)}
.form-note{font-size:12.5px;color:var(--muted);text-align:center;margin-top:12px}

/* footer */
.footer{border-top:1px solid var(--line);padding:62px 0 30px;background:var(--bg2)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.3fr;gap:40px;margin-bottom:42px}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}@media(max-width:560px){.footer-grid{grid-template-columns:1fr}}
.brand-light{margin-bottom:14px}
.foot-desc{color:var(--muted);max-width:300px;margin-bottom:18px}
.socials{display:flex;gap:10px}
.socials a{width:38px;height:38px;border-radius:10px;background:#fff;border:1px solid var(--line);display:grid;place-items:center;font-weight:700;color:var(--c-deep);transition:.2s}
.socials a:hover{background:var(--grad);color:#fff;border-color:transparent}
.footer h4{font-size:13px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:16px}
.footer a{color:var(--muted);display:block;margin-bottom:10px}.footer a:hover{color:var(--c)}
.footer-bot{border-top:1px solid var(--line);padding-top:24px;text-align:center;color:var(--muted);font-size:14px}

/* vpage badges */
.vpage-badge{position:fixed;bottom:18px;left:18px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 14px;font-size:12px;color:var(--muted);box-shadow:var(--sh-xs);z-index:90}.vpage-badge b{color:var(--c)}
.vpage-cta{position:fixed;bottom:18px;right:18px;z-index:90;background:var(--grad);color:#fff;font-weight:700;font-size:14px;padding:12px 20px;border-radius:999px;box-shadow:var(--glow);transition:transform .2s}.vpage-cta:hover{transform:translateY(-2px)}
@media(max-width:560px){.vpage-badge{display:none}.vpage-cta{bottom:14px;right:14px;font-size:13px;padding:10px 16px}}