/* Hướng dẫn sử dụng Jackapp — shared style. Ít chữ, nhiều hình, mobile-first. */
:root{
  --navy:#050816;--navy2:#0a0e23;--card:#101736;--line:rgba(255,255,255,.09);
  --fg:#f1f5ff;--mut:#a7b1d6;--gold:#facc15;--gold-deep:#f59e0b;
  --green:#34d399;--blue:#60a5fa;--pink:#f472b6;--violet:#a78bfa;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:radial-gradient(1200px 600px at 80% -10%,#16215c 0%,var(--navy) 55%) fixed,var(--navy);
  color:var(--fg);font-family:Nunito,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  line-height:1.55;-webkit-font-smoothing:antialiased;
}
a{color:inherit}
.wrap{max-width:960px;margin:0 auto;padding:0 18px}
/* ---------- mini topbar ---------- */
.gnav{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:10px;
  padding:10px 16px;background:rgba(5,8,22,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.gnav .logo{display:flex;align-items:center;gap:8px;font-weight:800;text-decoration:none;font-size:1.05rem}
.gnav .logo img{width:30px;height:30px;border-radius:8px}
.gnav .sp{flex:1}
.gnav a.nlink{color:var(--mut);text-decoration:none;font-weight:700;font-size:.92rem;padding:8px 12px;border-radius:10px;white-space:nowrap}
.gnav a.nlink:hover,.gnav a.nlink.on{color:var(--fg);background:rgba(255,255,255,.07)}
.gnav a.nlink.on{color:var(--gold)}
@media(max-width:640px){.gnav a.nlink.hide-m{display:none}}
/* ---------- hero ---------- */
.hero{text-align:center;padding:52px 18px 30px}
.hero .kicker{display:inline-block;font-size:.8rem;font-weight:800;letter-spacing:.12em;color:var(--gold);
  border:1px solid rgba(250,204,21,.35);border-radius:999px;padding:6px 14px;margin-bottom:16px;background:rgba(250,204,21,.07)}
.hero h1{font-size:clamp(1.7rem,5vw,2.6rem);margin:.2em 0 .3em;font-weight:900;line-height:1.25}
.hero h1 .hl{color:var(--gold)}
.hero p.sub{color:var(--mut);font-size:1.05rem;max-width:620px;margin:0 auto}
.hero .mascot{font-size:3.2rem;display:block;margin-bottom:6px;animation:bob 3s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
/* ---------- audience cards ---------- */
.aud-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:26px 0 10px}
.aud-card{display:block;text-decoration:none;background:linear-gradient(160deg,var(--card),#0c1230);
  border:1px solid var(--line);border-radius:20px;padding:26px 22px;transition:transform .18s,box-shadow .18s}
.aud-card:hover{transform:translateY(-4px);box-shadow:0 14px 40px rgba(0,0,0,.45);border-color:rgba(250,204,21,.4)}
.aud-card .em{font-size:2.6rem}
.aud-card h2{margin:.5em 0 .25em;font-size:1.25rem}
.aud-card p{margin:0;color:var(--mut);font-size:.95rem}
.aud-card .go{display:inline-block;margin-top:14px;font-weight:800;color:var(--gold)}
/* ---------- what-is strip ---------- */
.what{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:20px;padding:26px;margin:34px 0}
.what h2{margin:0 0 6px;font-size:1.3rem}
.what p{color:var(--mut);margin:.4em 0}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px;margin-top:18px}
.stat{background:rgba(250,204,21,.06);border:1px solid rgba(250,204,21,.22);border-radius:16px;padding:14px 10px;text-align:center}
.stat b{display:block;font-size:1.5rem;color:var(--gold)}
.stat span{font-size:.82rem;color:var(--mut)}
/* ---------- steps ---------- */
.steps{display:flex;flex-direction:column;gap:18px;margin:10px 0 30px}
.step{display:grid;grid-template-columns:64px 1fr;gap:6px 16px;background:linear-gradient(160deg,var(--card),#0b112c);
  border:1px solid var(--line);border-radius:20px;padding:20px;overflow:hidden}
.step .num{grid-row:span 2;width:52px;height:52px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  font-size:1.4rem;font-weight:900;background:linear-gradient(135deg,var(--gold-deep),#ef4444);color:#fff;
  box-shadow:0 6px 18px rgba(239,68,68,.35)}
.step h3{margin:2px 0 4px;font-size:1.12rem}
.step h3 .tag{font-size:.72rem;font-weight:800;color:var(--navy);background:var(--gold);border-radius:999px;padding:2px 10px;margin-left:8px;vertical-align:middle}
.step p{margin:0 0 12px;color:var(--mut);font-size:.96rem;max-width:60ch}
.step p b{color:var(--fg)}
.step figure{grid-column:1/-1;margin:6px 0 0;border-radius:14px;overflow:hidden;border:1px solid var(--line);background:#070b1e}
.step figure img,.step figure video{display:block;width:100%;height:auto}
.step figcaption{padding:8px 14px;font-size:.82rem;color:var(--mut);border-top:1px solid var(--line)}
@media(max-width:560px){.step{grid-template-columns:48px 1fr;padding:16px}.step .num{width:42px;height:42px;font-size:1.15rem}}
/* ---------- mascots & tap-target replicas ---------- */
.mascots{display:flex;justify-content:center;align-items:flex-end;gap:6px;margin-bottom:10px;min-height:90px}
.mascots img{height:86px;width:auto;filter:drop-shadow(0 8px 16px rgba(0,0,0,.5));animation:bob 3.4s ease-in-out infinite}
.mascots img:nth-child(2){height:108px;animation-delay:.7s}
.mascots img:nth-child(3){animation-delay:1.4s}
.tap-row{display:flex;flex-wrap:wrap;gap:8px;margin:4px 0 2px;align-items:center}
.tap-label{font-size:.82rem;color:var(--mut);font-weight:700}
.tap{display:inline-flex;align-items:center;gap:6px;background:#232946;border:2px solid #4a5178;color:#f1f5f9;
  font-weight:700;font-size:.9rem;border-radius:12px;padding:9px 14px;box-shadow:0 3px 10px rgba(0,0,0,.35)}
.tap.gold{border-color:rgba(250,204,21,.55);background:rgba(250,204,21,.1)}
.tap.green{border-color:rgba(52,211,153,.55);background:rgba(52,211,153,.1)}
/* ---------- tip / note boxes ---------- */
.tip{border-left:4px solid var(--green);background:rgba(52,211,153,.07);border-radius:0 14px 14px 0;padding:14px 18px;margin:18px 0;color:var(--fg)}
.tip b{color:var(--green)}
.warn{border-left:4px solid var(--gold);background:rgba(250,204,21,.07);border-radius:0 14px 14px 0;padding:14px 18px;margin:18px 0}
.warn b{color:var(--gold)}
/* ---------- CTA ---------- */
.cta{text-align:center;padding:34px 18px 60px}
.cta .btn{display:inline-block;text-decoration:none;font-weight:900;font-size:1.05rem;color:#fff;
  background:linear-gradient(135deg,#f59e0b,#ef4444);padding:15px 34px;border-radius:16px;
  box-shadow:0 8px 28px rgba(239,68,68,.45);transition:transform .15s}
.cta .btn:hover{transform:scale(1.04)}
.cta .ghost{display:inline-block;margin-top:14px;color:var(--mut);font-weight:700;text-decoration:none}
/* ---------- footer ---------- */
.gfoot{border-top:1px solid var(--line);padding:22px 18px 40px;text-align:center;color:var(--mut);font-size:.85rem}
.gfoot a{color:var(--gold);font-weight:700;text-decoration:none;margin:0 8px}
@media(prefers-reduced-motion:reduce){.hero .mascot{animation:none}html{scroll-behavior:auto}}