/* ===== Liver Detoxnic Plus — theo DESIGN.md ===== */
:root{
  --navy:#0e2a47; --navy-deep:#0a2038; --teal:#0f5e6e;
  --gold:#f6b800; --gold-soft:#ffd873; --red:#e8492b; --green:#17a45a; --blue:#1e88e5;
  --ink:#132033; --muted:#5b6b7b; --line:#e6edf4; --paper:#f6f9fc; --white:#fff;
  --r-sm:10px; --r-md:18px; --r-lg:26px; --pill:999px;
  --sec:96px;
  --sh-1:0 2px 10px rgba(14,42,71,.05);
  --sh-2:0 14px 40px rgba(14,42,71,.10);
  --sh-3:0 26px 60px rgba(14,42,71,.16);
  --ease:cubic-bezier(.22,1,.36,1);
  --wrap:1160px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,'Segoe UI',Roboto,Arial,sans-serif;color:var(--ink);background:var(--white);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}
.rainbow-bar{height:4px;background:linear-gradient(90deg,var(--red),var(--gold),var(--green),var(--blue),#7b3ff2)}

/* Reveal on scroll */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:700;border:none;border-radius:var(--pill);padding:15px 30px;cursor:pointer;font-size:16px;transition:transform .18s var(--ease),box-shadow .18s var(--ease),filter .18s;line-height:1;white-space:nowrap}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 10px 24px rgba(232,73,43,.34)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(232,73,43,.42)}
.btn-gold{background:var(--gold);color:var(--navy);box-shadow:0 10px 24px rgba(246,184,0,.3)}
.btn-gold:hover{transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.08);border:1.5px solid rgba(255,255,255,.5);color:#fff;backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}

/* ===== Header ===== */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);backdrop-filter:saturate(150%) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:26px;height:86px}
.nav .logo img{height:66px}
.nav-menu{display:flex;gap:24px;margin-left:auto;font-weight:600;font-size:15px}
.nav-menu a{position:relative;color:var(--ink);padding:4px 0}
.nav-menu a:after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--red);transition:width .2s var(--ease)}
.nav-menu a:hover{color:var(--red)}
.nav-menu a:hover:after{width:100%}
.nav-right{display:flex;align-items:center;gap:14px}
.lang{display:flex;gap:2px;background:var(--paper);border:1px solid var(--line);border-radius:var(--pill);padding:4px}
.lang button{border:none;background:none;font-weight:700;font-size:13px;padding:6px 12px;border-radius:var(--pill);cursor:pointer;color:var(--muted);transition:.15s}
.lang button.active{background:var(--navy);color:#fff}
.hamburger{display:none;font-size:26px;background:none;border:none;cursor:pointer;color:var(--navy)}

/* ===== Hero ===== */
.hero{position:relative;background:radial-gradient(1000px 460px at 78% -8%,#17466c,var(--navy) 60%),var(--navy);color:#fff;overflow:hidden}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(70px);opacity:.5;pointer-events:none}
.hero:before{width:420px;height:420px;background:#1f6fae;top:-120px;left:-80px}
.hero:after{width:360px;height:360px;background:rgba(246,184,0,.35);bottom:-140px;right:8%}
.hero-grid{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:44px;align-items:center;padding:66px 0 78px}
.hero .eyebrow{display:inline-block;background:rgba(246,184,0,.16);color:var(--gold);font-weight:700;padding:7px 16px;border-radius:var(--pill);font-size:12.5px;letter-spacing:.12em;text-transform:uppercase}
.hero h1{font-size:52px;line-height:1.08;letter-spacing:-.02em;margin:20px 0 14px;font-weight:800}
.hero h1 .hl{color:var(--gold)}
.hero .sub{font-size:18px;color:#cfe0f0;max-width:520px}
.hero-cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.hero-trust{display:flex;gap:30px;margin-top:34px;flex-wrap:wrap}
.hero-trust div{font-size:13px;color:#a9c3da}
.hero-trust b{display:block;font-size:26px;color:#fff;font-weight:800;line-height:1.1}
.hero-media{position:relative;min-height:470px;display:flex;align-items:flex-end;justify-content:center;gap:14px}
.hero-media:before{content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:min(460px,90%);aspect-ratio:1;border-radius:50%;background:radial-gradient(circle,rgba(246,184,0,.5),rgba(246,184,0,0) 68%);pointer-events:none}
.hero-media .prod{position:relative;z-index:2}
.hero-media .box{max-height:440px;filter:drop-shadow(0 30px 40px rgba(0,0,0,.45));animation:float 6s ease-in-out infinite;order:2}
.hero-media .lo{max-height:380px;filter:drop-shadow(0 26px 34px rgba(0,0,0,.45));animation:float 6s ease-in-out infinite .7s;order:1}
.hero-media .vien{position:absolute;z-index:3;left:2%;bottom:-2%;max-height:120px;filter:drop-shadow(0 16px 22px rgba(0,0,0,.4));animation:float 5s ease-in-out infinite .4s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@media(prefers-reduced-motion:reduce){.hero-media .prod,.hero-media .vien{animation:none}}
.hero-badge{position:absolute;bottom:4%;right:0;z-index:4;background:#fff;color:var(--navy);border-radius:14px;padding:10px 16px;font-weight:800;box-shadow:var(--sh-2);font-size:13px;text-align:left;line-height:1.3}
.hero-badge span{color:var(--red);display:block;font-size:18px}

/* ===== Sections ===== */
section{padding:var(--sec) 0}
.alt{background:var(--paper)}
.sec-head{text-align:center;max-width:740px;margin:0 auto 52px}
.sec-head .kicker{color:var(--red);font-weight:700;letter-spacing:.12em;text-transform:uppercase;font-size:13px}
.sec-head h2{font-size:36px;font-weight:800;letter-spacing:-.01em;color:var(--navy);margin:10px 0 12px}
.sec-head p{color:var(--muted);font-size:17px}

/* Benefits */
.benefits{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.benefit{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:32px 26px;text-align:center;box-shadow:var(--sh-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.benefit:hover{transform:translateY(-6px);box-shadow:var(--sh-2)}
.benefit img{width:78px;height:78px;margin:0 auto 16px}
.benefit h3{font-size:19px;color:var(--navy);margin-bottom:7px;font-weight:700}
.benefit p{color:var(--muted);font-size:15px}

/* Ingredients */
.ingredients{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.ing{background:#fff;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.ing:hover{transform:translateY(-6px);box-shadow:var(--sh-2)}
.ing .ph{aspect-ratio:4/3;overflow:hidden;background:#eef3f8}
.ing .ph img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.ing:hover .ph img{transform:scale(1.06)}
.ing .body{padding:16px 18px 20px}
.ing h4{color:var(--navy);font-size:16px;font-weight:700}
.ing .dose{color:var(--red);font-weight:700;font-size:12.5px;margin:3px 0 7px}
.ing p{font-size:13.5px;color:var(--muted)}

/* Roadmap */
.timeline{max-width:900px;margin:0 auto;position:relative}
.timeline:before{content:"";position:absolute;left:120px;top:6px;bottom:6px;width:3px;background:linear-gradient(var(--gold),var(--green))}
.tl{display:grid;grid-template-columns:120px 1fr;gap:30px;margin-bottom:26px;position:relative}
.tl .wk{text-align:right;font-weight:800;color:var(--navy);padding-top:16px;padding-right:24px;font-size:15px;white-space:nowrap}
.tl .card{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:22px 24px;box-shadow:var(--sh-1);position:relative}
.tl .card:before{content:"";position:absolute;left:-40px;top:24px;width:15px;height:15px;border-radius:50%;background:var(--gold);border:3px solid #fff;box-shadow:0 0 0 3px rgba(246,184,0,.35)}
.tl h4{color:var(--teal);margin-bottom:6px;font-weight:700}
.tl p{font-size:14.5px;color:var(--muted)}

/* Certs */
.cert-imgs{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;max-width:880px;margin:0 auto 36px}
.cert-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);display:block;transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.cert-card:hover{transform:translateY(-5px);box-shadow:var(--sh-2)}
.cert-card img{width:100%;height:350px;object-fit:contain;background:#fff;padding:14px}
.cert-card span{display:block;text-align:center;padding:14px;color:var(--navy);font-weight:600;font-size:14px;border-top:1px solid var(--line)}
.certs{display:flex;justify-content:center;gap:36px;flex-wrap:wrap;align-items:center}
.certs img{width:92px;height:92px;transition:transform .2s var(--ease)}
.certs img:hover{transform:scale(1.08)}

/* Section nền tối (Nhà máy) */
.dark{background:radial-gradient(900px 400px at 80% -10%,#17466c,var(--navy) 60%),var(--navy);color:#fff}
.dark .sec-head h2{color:#fff}
.dark .sec-head p{color:#cfe0f0}
.factory-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.factory-shot{border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-2);display:block;aspect-ratio:3/4;transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.factory-shot:hover{transform:translateY(-5px);box-shadow:var(--sh-3)}
.factory-shot img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.factory-shot:hover img{transform:scale(1.06)}

/* Subheading trong section */
.subhead{text-align:center;color:var(--navy);font-size:20px;font-weight:700;margin:52px 0 24px}

/* Reviews - ảnh khách hàng dùng SP */
.cust-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.cust-shot{border-radius:var(--r-sm);overflow:hidden;box-shadow:var(--sh-1);display:block;aspect-ratio:1;transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.cust-shot:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.cust-shot img{width:100%;height:100%;object-fit:cover}

/* Reviews - tin nhắn */
.reviews{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.review-shot{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1);display:block;transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.review-shot:hover{transform:translateY(-5px);box-shadow:var(--sh-2)}
.review-shot img{width:100%;height:360px;object-fit:cover;object-position:top}
.review-shot span{display:block;text-align:center;padding:13px;color:var(--muted);font-size:13.5px;border-top:1px solid var(--line)}

/* USP */
.usp-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.usp{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:26px;box-shadow:var(--sh-1);transition:transform .2s var(--ease)}
.usp:hover{transform:translateY(-4px);box-shadow:var(--sh-2)}
.usp .n{flex:0 0 46px;height:46px;border-radius:13px;background:linear-gradient(135deg,var(--navy),var(--teal));color:var(--gold);font-weight:800;display:flex;align-items:center;justify-content:center;font-size:20px}
.usp h4{color:var(--navy);margin-bottom:5px;font-weight:700}
.usp p{color:var(--muted);font-size:14.5px}

/* Pricing — banner ảnh */
.price-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px;max-width:840px;margin:0 auto}
.price-banner{display:flex;flex-direction:column;gap:16px}
.price-img{display:block;border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-2);transition:transform .22s var(--ease),box-shadow .22s var(--ease)}
.price-img:hover{transform:translateY(-6px);box-shadow:var(--sh-3)}
.price-img img{width:100%;display:block}
.price-banner .btn{width:100%;justify-content:center;font-size:17px}

/* CTA band */
.cta-band{position:relative;background:radial-gradient(600px 300px at 20% 0%,#17466c,var(--navy)),var(--navy);color:#fff;text-align:center;border-radius:var(--r-lg);padding:60px 24px;overflow:hidden;box-shadow:var(--sh-3)}
.cta-band:after{content:"";position:absolute;width:320px;height:320px;border-radius:50%;background:rgba(246,184,0,.28);filter:blur(70px);bottom:-160px;right:-40px}
.cta-band h2{font-size:34px;margin-bottom:12px;position:relative;font-weight:800}
.cta-band p{color:#cfe0ee;max-width:560px;margin:0 auto 26px;position:relative}
.cta-band .btn{position:relative}

/* Info cards */
.info-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:30px;box-shadow:var(--sh-1)}
.info-card h3{color:var(--navy);margin-bottom:14px;display:flex;align-items:center;gap:9px;font-weight:700}
.info-card ul{list-style:none}
.info-card li{padding:8px 0 8px 28px;position:relative;color:var(--ink);font-size:15px}
.info-card li:before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:800}
.info-card.note li:before{content:"!";color:var(--red)}

/* Footer */
.footer{background:var(--navy-deep);color:#adc3d8;padding:60px 0 26px;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:38px;margin-bottom:32px}
.footer h4{color:#fff;margin-bottom:15px;font-size:16px;font-weight:700}
.footer a{display:block;padding:5px 0;color:#adc3d8;transition:.15s}
.footer a:hover{color:var(--gold)}
.footer .logo img{height:54px;margin-bottom:16px;background:#fff;padding:8px 12px;border-radius:12px}
.social{display:flex;gap:10px;margin-top:14px}
.social a{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;font-weight:700}
.social a:hover{background:var(--gold);color:var(--navy)}
.legal{background:rgba(246,184,0,.12);border:1px solid rgba(246,184,0,.35);color:var(--gold-soft);padding:13px 16px;border-radius:var(--r-sm);font-size:13px;margin-top:16px}
.foot-note{border-top:1px solid rgba(255,255,255,.1);padding-top:20px;font-size:13px;text-align:center;color:#7d97ad}

/* Mobile order bar */
.mobile-bar{display:none}

@media(max-width:960px){
  :root{--sec:64px}
  .hero-grid{grid-template-columns:1fr;text-align:center;padding:48px 0}
  .hero .sub{margin:0 auto}
  .hero-cta,.hero-trust{justify-content:center}
  .hero-media{min-height:340px;gap:10px}
  .hero-media .box{max-height:320px}
  .hero-media .lo{max-height:280px}
  .hero-media .vien{max-height:92px;left:0}
  .benefits{grid-template-columns:repeat(2,1fr)}
  .ingredients{grid-template-columns:repeat(2,1fr)}
  .reviews{grid-template-columns:repeat(2,1fr)}
  .factory-grid{grid-template-columns:repeat(2,1fr)}
  .cust-grid{grid-template-columns:repeat(4,1fr)}
  .cert-imgs{grid-template-columns:1fr}
  .usp-grid,.info-2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav-menu{display:none;position:absolute;top:86px;left:0;right:0;flex-direction:column;background:#fff;padding:16px 22px;border-bottom:1px solid var(--line);box-shadow:var(--sh-2)}
  .nav-menu.open{display:flex}
  .hamburger{display:block;order:5}
  .hero h1{font-size:34px}
  .sec-head h2{font-size:27px}
  .cta-band h2{font-size:26px}
  .timeline:before{left:15px}
  .tl{grid-template-columns:1fr}
  .tl .wk{text-align:left;padding-left:42px;padding-top:0}
  .tl .card:before{left:-34px}
  .footer-grid{grid-template-columns:1fr}
  .cust-grid{grid-template-columns:repeat(3,1fr)}
}