/* ============================================================
   Sinoflex — herbal AROMA CREAM, relaxing massage · STACK HERO
   Design: Slow, herbal spa rhythm. Soft sage + mint + cream —
   a botanical, centered atmosphere with a gentle sage glow,
   loose vertical spacing, muted organic shapes and a buttery,
   unhurried feel. Deliberately the anti-tempo to Flexacil.
   ============================================================ */
:root{
  --ink:#3d4a41;
  --ink2:#2f5c44;
  --muted:#728076;
  --accent:#6f9680;        /* sage green */
  --accent-d:#53755f;
  --mint:#cfe4d4;          /* mint */
  --mint-2:#e6f1e9;
  --cream:#faf7ef;         /* warm cream */
  --bg:#fbf8f1;
  --card:#fffdf7;
  --line:#e2e6da;
  --grad:linear-gradient(150deg,#526e5e 0%,#778c7d 100%);
  --glow:radial-gradient(circle,rgba(143,180,153,.55),rgba(207,228,212,.18) 60%,transparent 76%);
  --r:22px;
  --shadow:0 16px 34px -24px rgba(47,92,68,.4);
  --font:'Nunito','Segoe UI',system-ui,-apple-system,'Helvetica Neue',Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.72;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
h1,h2,h3{line-height:1.22;letter-spacing:0;font-weight:700}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(251,248,241,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-in{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:70px}
.brand{font-weight:800;letter-spacing:.04em;font-size:1.34rem;color:var(--ink2)}
.brand b{color:#5a7d62}
.nav{display:flex;align-items:center;gap:26px}
.nav a{color:var(--muted);font-weight:600;font-size:.94rem}
.nav a:hover{color:var(--accent-d)}
.cta-btn{display:inline-block;background:linear-gradient(135deg,#6f9680,#93b39a);color:#fff;font-weight:800;font-size:.96rem;padding:.85rem 1.5rem;border-radius:999px;box-shadow:0 12px 26px -12px rgba(111,150,128,.7);transition:transform .18s ease,box-shadow .18s ease}
.cta-btn:hover{transform:translateY(-2px);box-shadow:0 18px 32px -14px rgba(111,150,128,.85)}
.nav .cta-btn{color:#fff;padding:.6rem 1.15rem}

/* ---------- Hero (STACK archetype) — soft sage botanical ---------- */
.hero{background:linear-gradient(170deg,#f7f3e8 0%,var(--cream) 46%,var(--mint-2) 100%);color:var(--ink);position:relative;overflow:hidden}
/* soft botanical leaf texture */
.hero::before{content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
  background:
    radial-gradient(circle at 18% 22%,rgba(111,150,128,.18),transparent 34%),
    radial-gradient(circle at 84% 18%,rgba(207,228,212,.5),transparent 36%),
    radial-gradient(circle at 75% 78%,rgba(111,150,128,.15),transparent 40%),
    radial-gradient(circle at 22% 82%,rgba(207,228,212,.45),transparent 38%)}
.hero::after{content:"";position:absolute;width:560px;height:560px;border-radius:50%;top:50%;left:50%;transform:translate(-50%,-50%);background:var(--glow);pointer-events:none;filter:blur(6px);opacity:.55}
.stack-in{position:relative;z-index:1}
.eyebrow{display:inline-block;color:var(--accent-d);font-weight:700;letter-spacing:.2em;text-transform:uppercase;font-size:.7rem;margin-bottom:18px;background:rgba(255,253,247,.7);border:1px solid var(--line);padding:.4rem 1rem;border-radius:999px;box-shadow:var(--shadow)}
.hero h1{font-size:clamp(1.9rem,4.6vw,3.1rem);color:var(--ink2);margin-bottom:18px;font-weight:800;letter-spacing:.01em}
.hero .lead{color:var(--muted);font-size:1.08rem;margin:0 auto 16px;max-width:56ch}
.hero .hot{color:var(--accent-d);font-weight:600;font-size:.95rem;margin-bottom:10px;font-style:italic}
.hero-actions{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.hero-actions .cta-btn{font-size:1.04rem;padding:.95rem 1.7rem}
.quick-chips{list-style:none;display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:22px auto 0;padding:0;max-width:760px}
.quick-chips li{background:rgba(255,253,247,.85);border:1px solid var(--line);padding:8px 17px;border-radius:999px;font-weight:600;font-size:.88rem;color:var(--ink2)}
.hero .hero-visual::before{content:"";position:absolute;width:min(380px,90%);aspect-ratio:1;border-radius:50%;background:var(--glow);filter:blur(4px);opacity:.6}
.hero-prod{position:relative;width:min(270px,50vw);height:auto;filter:drop-shadow(0 30px 38px rgba(47,92,68,.3))}

/* ---------- Sections ---------- */
section{padding:70px 22px}
.sec-head{max-width:680px;margin:0 auto 40px;text-align:center}
.kicker{color:var(--accent);font-weight:700;letter-spacing:.24em;text-transform:uppercase;font-size:.66rem;margin-bottom:14px}
.sec-head h2{font-size:clamp(1.5rem,2.7vw,2.15rem);color:var(--ink2);margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:1rem}

/* benefits */
.ben-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ben-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:30px 26px;box-shadow:var(--shadow);text-align:center;transition:transform .2s ease}
.ben-card:hover{transform:translateY(-5px)}
.ben-card .ic{width:56px;height:56px;border-radius:50%;background:radial-gradient(circle,#e6f1e9,#cfe4d4);display:grid;place-items:center;margin:0 auto 16px}
.ben-card .ic svg{width:26px;height:26px;color:var(--accent-d)}
.ben-card h3{color:var(--ink2);font-size:1.05rem;margin-bottom:9px}
.ben-card p{color:var(--muted);font-size:.93rem}

/* how */
.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:30px;position:relative;box-shadow:var(--shadow);text-align:center}
.step .num{width:54px;height:54px;border-radius:50%;background:linear-gradient(135deg,#6f9680,#93b39a);color:#fff;display:grid;place-items:center;font-weight:800;font-size:1.1rem;margin:0 auto 16px;box-shadow:0 12px 20px -10px rgba(111,150,128,.7)}
.step h3{color:var(--ink2);font-size:1.05rem;margin-bottom:9px}
.step p{color:var(--muted);font-size:.93rem}

/* ingredients */
.ing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.ing-card{background:linear-gradient(180deg,#fffdf7,#f2f6ef);border:1px solid var(--line);border-left:4px solid var(--mint);border-radius:16px;padding:20px;box-shadow:var(--shadow)}
.ing-card h3{color:var(--ink2);font-size:.99rem;margin-bottom:7px}
.ing-card p{color:var(--muted);font-size:.89rem}

/* about split */
#about .split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center;background:linear-gradient(135deg,var(--ink2),#46644e);border-radius:26px;padding:46px;color:#fff;box-shadow:0 26px 50px -32px rgba(47,92,68,.7)}
#about .split .kicker{color:#c9e0cf}
#about .split h2{color:#f6f7ee;font-size:clamp(1.4rem,2.4vw,1.95rem);margin-bottom:12px}
#about .split p.lead{color:#dceadd;font-size:1rem}
.checklist{list-style:none;margin:0 0 26px}
.checklist li{display:flex;align-items:flex-start;gap:12px;color:#e6efe6;font-weight:600;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.15);font-size:.96rem}
.checklist svg{flex:none;width:20px;height:20px;color:#c9e0cf;margin-top:3px}

/* quote */
.quote{background:linear-gradient(180deg,var(--mint-2),#dceadb);color:var(--ink2);text-align:center}
.quote h2{font-size:clamp(1.5rem,2.7vw,2.15rem);max-width:620px;margin:0 auto 14px}
.quote p{color:var(--muted);max-width:580px;margin:0 auto 26px;font-size:1rem}

/* faq */
.faq-box{max-width:780px;margin:0 auto}
details{background:var(--card);border:1px solid var(--line);border-radius:18px;margin-bottom:12px;box-shadow:0 10px 24px -20px rgba(47,92,68,.5);overflow:hidden}
summary{list-style:none;padding:19px 22px;font-weight:700;color:var(--ink2);cursor:pointer;position:relative;padding-right:42px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);color:var(--accent);font-size:1.3rem;font-weight:800}
details[open] summary::after{content:"−"}
details .a{padding:0 22px 19px;color:var(--muted);font-size:.95rem}

/* cta band */
.cta-band{background:linear-gradient(140deg,#46644e,var(--accent-d));color:#fff;text-align:center}
.cta-band h2{font-size:clamp(1.6rem,3vw,2.3rem);margin-bottom:12px}
.cta-band p{color:#e2eee3;max-width:620px;margin:0 auto 26px}

/* sub pages */
.simple{background:var(--bg);padding:64px 22px}
.simple .wrap{max-width:820px}
.simple h1{color:var(--ink2);font-size:clamp(1.6rem,3vw,2.2rem);margin-bottom:20px}
.simple p{color:var(--muted);margin-bottom:14px}
.simple .tip{background:var(--mint-2);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:12px;padding:16px 18px;color:var(--ink2);font-size:.95rem;margin:18px 0}
.cta-wrapper{text-align:center;margin-top:28px}
.simple .how-grid{margin-top:10px}

/* ---------- Footer ---------- */
.site-footer{background:#3c5747;color:#ddeae0;padding:56px 22px 30px}
.footer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:34px;margin-bottom:32px}
.site-footer h4{color:#f6f7ee;font-size:.95rem;margin-bottom:12px;text-transform:uppercase;letter-spacing:.08em}
.site-footer p{font-size:.87rem;color:#b7cdbd}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:8px}
.site-footer a{color:#c6d9ca;font-size:.9rem}
.site-footer a:hover{color:#e8f0e8}
.footer-bot{border-top:1px solid rgba(255,255,255,.15);padding-top:20px;color:#a9c2ae;font-size:.82rem;text-align:center}
.site-footer .ft-buy{display:inline-block;background:linear-gradient(135deg,#9cb3a1,#6f9680);color:#fff !important;font-weight:700;padding:9px 18px;border-radius:999px;margin-bottom:6px;box-shadow:0 4px 14px rgba(0,0,0,.22)}
.site-footer .ft-buy:hover{filter:brightness(1.08);color:#fff}

/* country switcher */
.lang-block{margin-bottom:30px}
.lang-label{color:#b7cdbd;font-size:.8rem;text-transform:uppercase;letter-spacing:.14em;margin-bottom:12px}
.lang-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.lang-link{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);color:#eef4ee;padding:.5rem .85rem;border-radius:14px;font-size:.86rem;transition:.15s;min-height:60px}
.lang-link:hover{background:rgba(159,186,166,.25);border-color:#9cb3a1}
.lang-link.active{background:var(--accent);color:#fff;border-color:var(--accent);font-weight:700}
.lang-link img{display:inline-block;vertical-align:middle;margin-right:6px;border-radius:2px;flex:none}

/* ---------- Interaction states ---------- */
a:focus-visible,summary:focus-visible{outline:3px solid rgba(111,150,128,.6);outline-offset:2px;border-radius:8px}
.cta-btn:focus-visible{outline:3px solid #fff;outline-offset:2px}

/* ---------- Responsive ---------- */
@media (max-width:720px){
  .ben-grid,.how-grid,.ing-grid{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:14px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .quote .wrap{text-align:center}
  .quote .cta-btn{justify-self:center}
  .cta-btn{min-height:52px;padding:0 22px}
  .step{text-align:center}
  section{padding:52px 18px}
}
@media (max-width:640px){
  .site-header{position:static}
  .header-in{flex-direction:column;gap:10px;padding:12px 16px}
  .nav{flex-wrap:wrap;justify-content:center;row-gap:8px}
  .nav .cta-btn{order:9;width:100%;justify-content:center}
  .lang-list{grid-template-columns:1fr 1fr;gap:8px}
  .sec-head h2{font-size:1.6rem}
  .hero h1{font-size:1.95rem}
  .hero .lead{font-size:1.04rem}
  .hero-prod{max-width:78%;margin:0 auto}
  .footer-bot{flex-direction:column;align-items:center;text-align:center}
}
@media (max-width:460px){
  .ben-grid,.how-grid{grid-template-columns:1fr}
  .lang-link{min-height:54px;font-size:.8rem;padding:6px 10px}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}