/* ============================================================
   HUFLIT Education Programs — Design System
   Phong cách: trẻ trung, năng động. HTML/CSS/JS thuần.
   ============================================================ */
:root{
  --brand:#0a2a66;       /* navy HUFLIT */
  --brand-2:#1e6fd9;     /* xanh sáng */
  --accent:#ff7a1a;      /* cam năng động */
  --accent-2:#ffd23f;    /* vàng */
  --ink:#10172a;
  --muted:#5b6577;
  --bg:#f6f8fc;
  --card:#ffffff;
  --line:#e7ecf5;
  --grad:linear-gradient(135deg,#0a2a66 0%,#1e6fd9 58%,#ff7a1a 135%);
  --grad-soft:linear-gradient(135deg,rgba(30,111,217,.12),rgba(255,122,26,.10));
  --shadow:0 10px 30px rgba(13,40,99,.10);
  --shadow-lg:0 22px 50px rgba(13,40,99,.18);
  --radius:20px;
  --maxw:1180px;
  --font:'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.section{padding:clamp(32px,4vw,46px) 0}
h1,h2,h3{line-height:1.18;font-weight:800;letter-spacing:-.02em}
h2.title{font-size:clamp(28px,4vw,40px)}
.lead{color:var(--muted);font-size:clamp(16px,2vw,19px);max-width:680px}
.center{text-align:center;margin-inline:auto}
.eyebrow{display:inline-block;font-weight:700;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--brand-2);background:var(--grad-soft);padding:7px 14px;border-radius:999px;margin-bottom:9px}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:15px;
  padding:13px 24px;border-radius:999px;border:0;cursor:pointer;transition:.25s;will-change:transform}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 10px 24px rgba(255,122,26,.35)}
.btn-primary:hover{transform:translateY(-3px) scale(1.02);box-shadow:0 16px 32px rgba(255,122,26,.45)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1.5px solid rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.24)}
.btn-light{background:#fff;color:var(--brand)}
.btn-light:hover{transform:translateY(-3px);box-shadow:var(--shadow)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--brand)}
.brand .logo{width:40px;height:40px;border-radius:11px;background:var(--grad);display:grid;place-items:center;color:#fff;font-weight:900;font-size:17px}
.brand small{display:block;font-weight:600;font-size:11px;color:var(--muted);letter-spacing:.04em}
.nav-links{display:flex;gap:26px;font-weight:600;font-size:15px}
.nav-links a{color:var(--muted);transition:.2s}
.nav-links a:hover{color:var(--brand-2)}
@media(max-width:760px){.nav-links{display:none}}
.nav-right{display:flex;align-items:center;gap:12px}
.langsw{display:inline-flex;gap:2px;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:3px}
.langsw .lsw{font-size:12.5px;font-weight:700;color:var(--muted);padding:5px 9px;border-radius:999px;line-height:1;transition:.18s;text-decoration:none}
.langsw .lsw:hover{color:var(--brand-2)}
.langsw .lsw.on{background:var(--brand);color:#fff}
@media(max-width:520px){.nav-right .btn{display:none}}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--grad);color:#fff;padding:clamp(48px,6vw,72px) 0 clamp(52px,6vw,76px)}
.hero .blob{position:absolute;border-radius:50%;filter:blur(8px);opacity:.5;animation:float 11s ease-in-out infinite}
.hero .b1{width:340px;height:340px;background:radial-gradient(circle,#ffd23f,transparent 70%);top:-90px;right:-60px}
.hero .b2{width:300px;height:300px;background:radial-gradient(circle,#ff7a1a,transparent 70%);bottom:-110px;left:-50px;animation-delay:-3s}
.hero .b3{width:220px;height:220px;background:radial-gradient(circle,#7fd0ff,transparent 70%);top:40%;left:55%;animation-delay:-6s}
@keyframes float{0%,100%{transform:translateY(0) translateX(0)}50%{transform:translateY(-26px) translateX(16px)}}
.hero-inner{position:relative;z-index:2;max-width:760px}
.hero h1{font-size:clamp(34px,6vw,62px);margin:12px 0 14px}
.hero h1 .hl{background:linear-gradient(120deg,#ffd23f,#fff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p{font-size:clamp(16px,2.2vw,20px);color:rgba(255,255,255,.92);max-width:620px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.hero-stats{display:flex;gap:30px;flex-wrap:wrap;margin-top:28px}
.hero-stats .s b{display:block;font-size:clamp(26px,4vw,38px);font-weight:800}
.hero-stats .s span{color:rgba(255,255,255,.8);font-size:14px}

/* ---------- Filter pills ---------- */
.filters{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin:22px 0 26px}
.pill{border:1.5px solid var(--line);background:#fff;color:var(--muted);font-weight:600;font-size:14px;
  padding:9px 18px;border-radius:999px;cursor:pointer;transition:.2s}
.pill:hover{border-color:var(--brand-2);color:var(--brand-2)}
.pill.active{background:var(--brand);border-color:var(--brand);color:#fff}

/* ---------- Program grid ---------- */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
@media(max-width:1100px){.grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:820px){.grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.grid{grid-template-columns:1fr}}
.pcard{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;transition:.28s;overflow:hidden;display:flex;flex-direction:column;gap:8px;min-height:180px}
.pcard::before{content:"";position:absolute;inset:0;background:var(--grad);opacity:0;transition:.28s;z-index:0}
.pcard>*{position:relative;z-index:1;transition:.28s}
.pcard:hover{transform:translateY(-7px);box-shadow:var(--shadow-lg);border-color:transparent}
.pcard:hover::before{opacity:1}
.pcard:hover .pc-name,.pcard:hover .pc-tag,.pcard:hover .pc-meta{color:#fff}
.pcard:hover .pc-arrow{background:#fff;color:var(--brand)}
.pc-icon{font-size:34px}
.pc-group{font-size:11px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--brand-2)}
.pcard:hover .pc-group{color:var(--accent-2)}
.pc-name{font-size:19px;font-weight:800;color:var(--ink)}
.pc-tag{font-size:13.5px;color:var(--muted)}
.pc-meta{margin-top:auto;display:flex;gap:14px;font-size:12.5px;color:var(--muted);font-weight:600}
.pc-arrow{position:absolute;top:22px;right:22px;width:34px;height:34px;border-radius:50%;background:var(--grad-soft);
  display:grid;place-items:center;color:var(--brand-2);font-size:17px;transition:.28s}
.pc-soon{position:absolute;top:18px;right:18px;background:var(--accent-2);color:#5a4500;font-size:10.5px;font-weight:800;
  padding:4px 10px;border-radius:999px;letter-spacing:.04em;text-transform:uppercase}
.pcard.locked{opacity:.92}
.pcard.locked:hover{transform:translateY(-4px)}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none}.hero .blob{animation:none}}

/* ---------- Feature strip ---------- */
.feat{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:820px){.feat{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.feat{grid-template-columns:1fr}}
.feat .f{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow)}
.feat .f .ic{font-size:30px;margin-bottom:10px}
.feat .f h3{font-size:17px;margin-bottom:6px}
.feat .f p{font-size:14px;color:var(--muted)}

/* ============================================================
   TRANG NGÀNH (nganh.html)
   ============================================================ */
.p-hero{background:var(--grad);color:#fff;padding:64px 0 72px;position:relative;overflow:hidden}
.p-hero .blob{position:absolute;border-radius:50%;opacity:.4;filter:blur(6px)}
.p-hero .pb1{width:300px;height:300px;background:radial-gradient(circle,#ffd23f,transparent 70%);top:-80px;right:-40px}
.breadcrumb{font-size:13.5px;color:rgba(255,255,255,.78);margin-bottom:18px;position:relative;z-index:2}
.breadcrumb a:hover{color:#fff;text-decoration:underline}
.p-hero-inner{position:relative;z-index:2;max-width:760px}
.p-hero .p-icon{font-size:54px}
.p-hero h1{font-size:clamp(30px,5vw,50px);margin:8px 0 12px}
.p-hero .p-tag{font-size:clamp(16px,2.2vw,20px);color:rgba(255,255,255,.92);max-width:640px}
.p-badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.badge{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.32);border-radius:999px;
  padding:7px 15px;font-size:13.5px;font-weight:600}

/* stat cards */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:-46px;position:relative;z-index:5}
@media(max-width:720px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;text-align:center;box-shadow:var(--shadow)}
.stat b{display:block;font-size:26px;font-weight:800;color:var(--brand)}
.stat span{font-size:13px;color:var(--muted)}

.block{padding:34px 0}
.block h2{font-size:clamp(24px,3.5vw,34px);margin-bottom:8px}
.block .sub{color:var(--muted);margin-bottom:28px}

/* why cards */
.why-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
@media(max-width:680px){.why-grid{grid-template-columns:1fr}}
.why{background:#fff;border:1px solid var(--line);border-left:5px solid var(--accent);border-radius:16px;padding:24px;box-shadow:var(--shadow);transition:.25s}
.why:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.why .ic{font-size:30px;margin-bottom:10px}
.why h3{font-size:18px;margin-bottom:6px}
.why p{font-size:14.5px;color:var(--muted)}

/* careers */
.careers{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
@media(max-width:680px){.careers{grid-template-columns:1fr}}
.career{display:flex;gap:13px;align-items:flex-start;background:var(--grad-soft);border-radius:14px;padding:16px 18px;font-size:14.5px}
.career .dot{flex:none;width:26px;height:26px;border-radius:50%;background:var(--brand-2);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:800}

/* majors chips */
.chips{display:flex;gap:10px;flex-wrap:wrap}
.chip{background:#fff;border:1.5px solid var(--line);border-radius:999px;padding:9px 18px;font-weight:600;font-size:14px;transition:.2s}
.chip:hover{border-color:var(--brand-2);color:var(--brand-2);transform:translateY(-2px)}

/* detail toggle */
.detail-bar{text-align:center;margin:-10px 0 0}
.detail-bar .btn{font-size:16px;font-weight:800;padding:15px 30px;background:var(--accent);color:#fff;
  border:0;box-shadow:0 10px 24px rgba(255,122,26,.35)}
.detail-bar .btn:hover{background:var(--accent);transform:translateY(-3px) scale(1.02);box-shadow:0 16px 32px rgba(255,122,26,.45)}
.detail-section{display:none}
.detail-section.open{display:block;animation:fade .5s ease}
@keyframes fade{from{opacity:0;transform:translateY(14px)}to{opacity:1}}

/* PLO list */
.plo{display:grid;gap:12px}
.plo .item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;font-size:14.5px;display:flex;gap:13px}
.plo .item b{flex:none;color:var(--brand-2)}

/* curriculum timeline */
.years{display:grid;gap:18px}
.year{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}
.year-head{background:var(--grad);color:#fff;padding:15px 22px;font-weight:800;font-size:17px;display:flex;justify-content:space-between;align-items:center}
.year-head .tc{font-size:13px;font-weight:600;background:rgba(255,255,255,.2);padding:4px 12px;border-radius:999px}
.sem{padding:8px 22px 18px}
.sem h4{font-size:14px;color:var(--brand-2);text-transform:uppercase;letter-spacing:.06em;margin:16px 0 10px}
.courses{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
@media(max-width:640px){.courses{grid-template-columns:1fr}}
.course{border:1px solid var(--line);border-radius:11px;font-size:14px;transition:.2s;overflow:hidden}
.course-head{display:flex;justify-content:space-between;gap:10px;align-items:center;padding:10px 14px}
.course-name{flex:1}
.course-r{flex:none;display:flex;align-items:center;gap:8px}
.course:hover{border-color:var(--brand-2)}
.course .ctc{flex:none;font-size:12px;font-weight:800;color:#fff;background:var(--brand-2);border-radius:8px;padding:3px 9px}
.course.has-desc>.course-head{cursor:pointer}
.course.has-desc:hover{background:var(--grad-soft)}
.course-toggle{flex:none;width:22px;height:22px;border-radius:50%;background:var(--grad-soft);color:var(--brand-2);
  display:grid;place-items:center;font-weight:800;font-size:15px;line-height:1;transition:.25s}
.course.has-desc.open .course-toggle{transform:rotate(45deg);background:var(--accent);color:#fff}
.course-desc{max-height:0;opacity:0;transition:max-height .35s ease,opacity .3s,padding .3s;padding:0 14px}
.course.has-desc.open .course-desc{max-height:1200px;opacity:1;padding:0 14px 14px}
.course-desc p{font-size:13.5px;color:var(--muted);line-height:1.6;margin:0;border-top:1px dashed var(--line);padding-top:10px}

/* final CTA */
.cta-band{background:var(--grad);color:#fff;border-radius:24px;padding:42px 40px;text-align:center;margin:24px 0 40px}
.cta-band h2{font-size:clamp(24px,3.5vw,34px);margin-bottom:10px}
.cta-band p{color:rgba(255,255,255,.9);margin-bottom:24px;max-width:560px;margin-inline:auto}

/* not found */
.notfound{text-align:center;padding:120px 20px}
.notfound .big{font-size:64px;margin-bottom:14px}

/* ============================================================
   QUIZ chọn ngành (quiz.html)
   ============================================================ */
.quiz-body{background:var(--bg)}
.quiz-stage{min-height:calc(100vh - 68px);background:var(--grad);display:flex;align-items:flex-start;justify-content:center;padding:40px 18px 60px;position:relative;overflow:hidden}
.quiz-wrap{width:100%;max-width:640px;position:relative;z-index:2}
.q-card{background:var(--card);border-radius:22px;padding:34px 30px;box-shadow:var(--shadow-lg);text-align:center}
.q-intro .q-emoji{font-size:54px;margin-bottom:10px}
.q-card h1{font-size:clamp(24px,4vw,34px);color:var(--brand);margin-bottom:12px}
.q-card h2{font-size:clamp(19px,3vw,24px);color:var(--ink);margin-bottom:8px;line-height:1.3}
.q-card p{color:var(--muted);font-size:15px;max-width:480px;margin:0 auto 18px}
.q-sub{font-size:13.5px!important;margin-bottom:16px!important}
.q-note{font-size:12.5px!important;color:var(--muted);margin-top:14px!important}
.q-start{font-size:16px;padding:14px 30px;margin-top:6px}
/* progress */
.qp{max-width:640px;margin:0 auto 14px}
.qp-bar{height:8px;background:rgba(255,255,255,.4);border-radius:999px;overflow:hidden}
.qp-bar span{display:block;height:100%;background:#fff;border-radius:999px;transition:width .4s ease}
.qp-txt{color:#fff;font-size:12.5px;font-weight:700;margin-top:7px;text-align:center;opacity:.95}
/* options */
.q-opts{display:grid;gap:11px;margin-top:6px}
.q-opt{display:flex;align-items:center;gap:11px;width:100%;text-align:left;background:#fff;border:1.6px solid var(--line);
  border-radius:14px;padding:15px 17px;font:inherit;font-size:15px;font-weight:600;color:var(--ink);cursor:pointer;transition:.18s}
.q-opt:hover{border-color:var(--brand-2);background:var(--grad-soft);transform:translateY(-2px);box-shadow:var(--shadow)}
.qo-emoji{font-size:22px}
.q-dob{margin:8px 0 20px}
.q-dob input{font:inherit;font-size:17px;padding:13px 16px;border:1.6px solid var(--line);border-radius:13px;text-align:center}
.q-next{font-size:15px;padding:12px 28px}
.q-next:disabled{opacity:.45;cursor:not-allowed}
.reveal-in{animation:qIn .45s cubic-bezier(.2,.7,.2,1)}
@keyframes qIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
/* result */
.q-result{background:var(--card);border-radius:22px;padding:32px 26px;box-shadow:var(--shadow-lg)}
.q-persona{text-align:center;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:20px}
.qp-emoji{font-size:60px;line-height:1}
.qp-eyebrow{font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brand-2);margin-top:8px}
.q-persona h1{font-size:clamp(24px,4vw,32px);color:var(--brand);margin:4px 0 8px}
.q-persona p{color:var(--muted);font-size:15px;max-width:460px;margin:0 auto}
.q-rec-h{font-size:16px;color:var(--navy,var(--brand));margin-bottom:12px}
.q-recs{display:grid;gap:11px;margin-bottom:24px}
.q-rec{display:flex;align-items:center;gap:14px;background:#fff;border:1.5px solid var(--line);border-radius:15px;padding:13px 16px;text-decoration:none;transition:.2s}
.q-rec:first-child{border-color:var(--accent);background:linear-gradient(135deg,#fff,rgba(255,122,26,.07))}
.q-rec:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--brand-2)}
.qr-icon{font-size:32px;flex:none}
.qr-body{flex:1;display:flex;flex-direction:column}
.qr-body b{font-size:16px;color:var(--ink)}
.qr-body span{font-size:13px;color:var(--muted)}
.qr-go{flex:none;font-size:12.5px;font-weight:800;color:var(--accent)}
.q-horo{background:var(--grad-soft);border-radius:16px;padding:18px;text-align:center;margin-bottom:22px}
.q-horo h3{font-size:15px;color:var(--brand);margin-bottom:14px}
.q-horo-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.qh{background:#fff;border-radius:12px;padding:12px 8px;display:flex;flex-direction:column;align-items:center;gap:3px}
.qh span{font-size:30px}
.qh b{font-size:13.5px;color:var(--ink)}
.qh small{font-size:11px;color:var(--muted);line-height:1.3}
.q-horo-line{font-size:14px;color:var(--ink)!important;margin:14px auto 0!important}
.q-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
@media(max-width:520px){.q-horo-grid{grid-template-columns:1fr}.q-actions .btn{flex:1 1 100%}}

/* ---------- Footer ---------- */
.site-footer{background:var(--brand);color:rgba(255,255,255,.82);padding:46px 0 30px;margin-top:40px}
.site-footer .cols{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;margin-bottom:26px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:12px}
.site-footer a{color:rgba(255,255,255,.78);font-size:14px;display:block;padding:3px 0}
.site-footer a:hover{color:var(--accent-2)}
.site-footer .copy{border-top:1px solid rgba(255,255,255,.16);padding-top:18px;font-size:13px;color:rgba(255,255,255,.6)}