/* ============================================================
   STEEL FLOW PRO™ — steelflowprousa.com — css/style.css
   Theme  : Deep Slate (#1E2A3A) + Steel Blue (#4A90A4) + Crimson (#C41E3A)
   Font   : Nunito Sans (single — never used before)
   Design : Premium masculine health — mobile-first responsive
   ============================================================ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --slate:  #1E2A3A;   /* deep slate */
  --slate2: #2D3E50;
  --slatep: #EEF2F7;
  --steel:  #4A90A4;   /* steel blue */
  --steel2: #5BA3B8;
  --steelp: #EBF5F9;
  --crim:   #C41E3A;   /* crimson */
  --crim2:  #E02040;
  --crimp:  #FEF0F2;
  --gold:   #C9930A;
  --gold2:  #E5A80C;
  --white:  #FFFFFF;
  --cream:  #F8F9FB;
  --off:    #F2F5F8;
  --dark:   #0E1825;
  --mid:    #2A3B4D;
  --muted:  #5A6E82;
  --bds:    #D0DBE6;
  --bdr:    #A8C4D4;
  --r: 8px; --rp: 50px
}

html{scroll-behavior:smooth}
body{font-family:'Nunito Sans',system-ui,-apple-system,sans-serif;font-size:17px;color:var(--dark);background:var(--cream);overflow-x:hidden;line-height:1.73}

/* ── NAV ── */
nav{position:sticky;top:0;z-index:100;background:var(--slate);height:64px;padding:0 20px;transition:box-shadow .3s}
.nav-in{max-width:1200px;margin:0 auto;height:100%;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{font-size:1.2rem;font-weight:800;color:var(--white);text-decoration:none;letter-spacing:.3px;flex-shrink:0;line-height:1.2}
.nav-links{display:flex;align-items:center;gap:16px;list-style:none}
.nav-links a{color:rgba(255,255,255,.6);text-decoration:none;font-size:.85rem;font-weight:600;transition:color .2s;white-space:nowrap}
.nav-links a:hover{color:var(--steel2)}
.nav-btn{background:var(--crim)!important;color:var(--white)!important;padding:9px 20px;border-radius:var(--rp);font-weight:700!important;font-size:.82rem!important;transition:background .2s,transform .15s!important}
.nav-btn:hover{background:var(--crim2)!important;transform:translateY(-1px)}
.burger{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.burger span{width:24px;height:2px;background:var(--steel2);display:block;border-radius:2px}
.mob-nav{display:none;flex-direction:column;background:var(--slate);border-bottom:2px solid rgba(74,144,164,.3);padding:20px;gap:12px;position:absolute;top:64px;left:0;right:0;z-index:99;box-shadow:0 8px 20px rgba(14,24,37,.5)}
.mob-nav.open{display:flex}
.mob-nav a{color:rgba(255,255,255,.65);text-decoration:none;font-size:1rem;font-weight:600;padding:6px 0;border-bottom:1px solid rgba(255,255,255,.08)}
.mob-nav a:hover{color:var(--steel2)}
.mob-btn{background:var(--crim);color:var(--white)!important;text-align:center;padding:13px;border-radius:var(--rp);font-weight:700;margin-top:6px;border-bottom:none!important}

/* ── BUTTONS ── */
.btn-primary{display:inline-block;background:var(--crim);color:var(--white);font-weight:700;font-size:.95rem;padding:13px 30px;border-radius:var(--rp);text-decoration:none;transition:background .2s,transform .15s;box-shadow:0 3px 14px rgba(196,30,58,.3)}
.btn-primary:hover{background:var(--crim2);transform:translateY(-2px);box-shadow:0 5px 20px rgba(196,30,58,.4)}
.btn-xl{font-size:1.05rem;padding:15px 40px}

/* ── BANDS ── */
.band{background:linear-gradient(135deg,var(--slate) 0%,var(--mid) 100%);padding:46px 20px 38px;text-align:center}
.band h2,.band h3{font-size:1.88rem;font-weight:800;color:var(--white);line-height:1.2;margin-bottom:8px}
.band-s{font-size:.94rem;color:rgba(255,255,255,.55);font-weight:400;margin-top:6px}

/* ── HERO ── */
.hero{background:linear-gradient(150deg,var(--slatep) 0%,var(--steelp) 60%,var(--white) 100%);padding:64px 20px}
.hero-in{max-width:1160px;margin:0 auto;display:grid;grid-template-columns:420px 1fr;align-items:center;gap:52px}
.hero-img{display:flex;flex-direction:column;align-items:center;gap:16px}
.hero-img a img{max-width:100%;filter:drop-shadow(0 12px 32px rgba(30,42,58,.2));transition:transform .4s;display:block}
.hero-img a:hover img{transform:scale(1.04)}
.hero-certs{display:flex;flex-wrap:wrap;justify-content:center;gap:6px}
.hero-certs span{font-size:.77rem;font-weight:700;color:var(--slate);background:var(--white);border:1px solid var(--bds);padding:4px 12px;border-radius:var(--rp)}
.hero-badge-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.hb-japan{background:var(--crim);color:var(--white);padding:5px 14px;border-radius:var(--rp);font-size:.77rem;font-weight:800;text-transform:uppercase;letter-spacing:.5px}
.hb-n{background:var(--steel);color:var(--white);padding:5px 14px;border-radius:var(--rp);font-size:.77rem;font-weight:700}
.hero-text h1{font-size:2.2rem;font-weight:800;line-height:1.1;color:var(--dark);margin-bottom:16px}
.hero-sub{font-size:1rem;line-height:1.78;color:var(--muted);margin-bottom:22px}
.hero-points{display:flex;flex-direction:column;gap:12px;margin-bottom:22px;background:var(--white);border:1px solid var(--bds);border-radius:var(--r);padding:16px 18px}
.hp-item{display:flex;gap:12px;align-items:flex-start}
.hp-ico{font-size:1.4rem;flex-shrink:0;margin-top:1px}
.hp-item strong{display:block;font-size:.9rem;font-weight:700;color:var(--dark);margin-bottom:2px}
.hp-item p{font-size:.83rem;color:var(--muted);line-height:1.5}
.hero-price-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:22px}
.hpr-from{font-size:.9rem;color:var(--muted)}
.hpr-price{font-size:2.2rem;font-weight:800;color:var(--crim)}
.hpr-per{font-size:.9rem;color:var(--muted)}
.hpr-free{font-size:.8rem;font-weight:700;color:var(--steel);background:var(--steelp);padding:4px 12px;border-radius:var(--rp);border:1px solid var(--bdr)}
.hero-trust{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:14px}
.hero-trust span{font-size:.82rem;font-weight:600;color:var(--muted)}
.hero-disc{font-size:.73rem;color:#8A9BB0;margin-top:10px;font-style:italic;line-height:1.5}

/* ── PRICE IMG ── */
.price-img-sec{background:var(--dark);padding:40px 20px;text-align:center}
.price-img-sec a{display:inline-block}
.price-img-sec a img{max-width:960px;width:100%;height:auto;border-radius:var(--r);transition:transform .3s;box-shadow:0 4px 24px rgba(0,0,0,.4)}
.price-img-sec a:hover img{transform:scale(1.01)}

/* ── PROBLEM SECTION ── */
.problem-section{background:var(--cream);padding:60px 20px}
.prob-in{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:1fr 360px;gap:52px;align-items:start}
.prob-text p{font-size:1.02rem;line-height:1.82;color:var(--muted);margin-bottom:14px}
.prob-disc{font-size:.78rem!important;color:#8A9BB0;font-style:italic;background:var(--steelp);border:1px solid var(--bdr);border-radius:var(--r);padding:10px 14px;margin-top:4px}
.prob-stats{display:flex;flex-direction:column;gap:14px}
.ps-card{background:var(--white);border:1px solid var(--bds);border-radius:var(--r);border-left:3px solid var(--crim);padding:18px 18px}
.psc-n{font-size:2rem;font-weight:800;color:var(--crim);display:block;line-height:1;margin-bottom:4px}
.ps-card h3{font-size:.9rem;font-weight:700;color:var(--dark);margin-bottom:6px;text-transform:uppercase;letter-spacing:.4px}
.ps-card p{font-size:.84rem;line-height:1.6;color:var(--muted)}

/* ── ABOUT ── */
.about-section{background:var(--off);padding:60px 20px}
.about-in{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:1fr 340px;align-items:center;gap:52px}
.about-text p{font-size:1.02rem;line-height:1.82;color:var(--muted);margin-bottom:14px}
.about-disc{font-size:.78rem!important;color:#8A9BB0;font-style:italic}
.about-img img{max-width:100%;filter:drop-shadow(0 8px 24px rgba(30,42,58,.15));border-radius:var(--r)}

/* ── INGREDIENTS ── */
.ing-section{background:var(--steelp);padding:60px 20px}
.ing-grid{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-bottom:20px}
.ing-card{background:var(--white);border:1px solid var(--bds);border-radius:var(--r);border-top:3px solid var(--steel);padding:22px 20px;position:relative;transition:box-shadow .3s,transform .3s}
.ing-card:hover{box-shadow:0 6px 18px rgba(74,144,164,.12);transform:translateY(-3px)}
.ic-n{position:absolute;top:10px;right:14px;font-size:2.4rem;font-weight:800;color:rgba(74,144,164,.08);line-height:1}
.ic-ico{font-size:1.8rem;display:block;margin-bottom:10px}
.ing-card h3{font-size:.97rem;font-weight:800;color:var(--dark);margin-bottom:4px;line-height:1.25}
.ic-tag{display:inline-block;font-size:.73rem;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--steel);margin-bottom:10px}
.ing-card p{font-size:.88rem;line-height:1.72;color:var(--muted)}
.ing-note{max-width:1100px;margin:0 auto;font-size:.78rem;color:#5A6E82;line-height:1.65;font-style:italic;text-align:center;padding:14px 18px;background:var(--white);border:1px solid var(--bdr);border-radius:var(--r)}

/* ── BENEFITS TIMELINE ── */
.timeline-section{background:var(--white);padding:60px 20px}
.timeline-in{max-width:920px;margin:0 auto;display:flex;flex-direction:column;gap:0;margin-bottom:36px}
.tl-item{display:flex;gap:24px;align-items:flex-start;padding:28px 0;border-bottom:1px solid var(--bds)}
.tl-item:last-child{border-bottom:none}
.tl-marker{background:linear-gradient(135deg,var(--crim) 0%,var(--crim2) 100%);color:var(--white);font-size:.8rem;font-weight:800;padding:8px 14px;border-radius:var(--r);white-space:nowrap;flex-shrink:0;text-align:center;letter-spacing:.3px;min-width:90px;text-transform:uppercase}
.tl-body h3{font-size:1rem;font-weight:800;color:var(--dark);margin-bottom:10px}
.tl-body p{font-size:.93rem;line-height:1.78;color:var(--muted);margin-bottom:10px}
.tl-disc{font-size:.78rem!important;color:#8A9BB0;font-style:italic;background:var(--slatep);border-radius:var(--r);padding:8px 12px}
.tl-cta{text-align:center}

/* ── WHO FOR ── */
.who-section{background:var(--off);padding:60px 20px}
.who-grid{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.who-card{background:var(--white);border:1px solid var(--bds);border-radius:var(--r);border-top:3px solid var(--steel);padding:24px 20px;transition:box-shadow .3s,transform .3s}
.who-card:hover{box-shadow:0 6px 18px rgba(74,144,164,.1);transform:translateY(-3px)}
.wc-ico{font-size:2rem;display:block;margin-bottom:10px}
.who-card h3{font-size:.9rem;font-weight:700;color:var(--dark);text-transform:uppercase;letter-spacing:.3px;margin-bottom:8px}
.who-card p{font-size:.87rem;line-height:1.7;color:var(--muted)}

/* ── REVIEWS ── */
.reviews-section{background:var(--cream);padding:60px 20px}
.reviews-grid{max-width:1100px;margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:16px}
.rv-card{background:var(--white);border:1px solid var(--bds);border-radius:var(--r);border-top:3px solid var(--crim);padding:24px 22px;transition:box-shadow .3s,transform .3s}
.rv-card:hover{box-shadow:0 6px 18px rgba(196,30,58,.08);transform:translateY(-3px)}
.rv-stars{font-size:1.05rem;color:var(--gold);letter-spacing:3px;margin-bottom:8px}
.rv-badge{font-size:.77rem;font-weight:700;color:var(--steel);text-transform:uppercase;letter-spacing:.3px;margin-bottom:14px}
.rv-text{font-size:.9rem;line-height:1.75;color:var(--muted);margin-bottom:18px;font-style:italic}
.rv-foot{display:flex;align-items:center;gap:12px;border-top:1px solid var(--bds);padding-top:14px}
.rv-photo{width:56px;height:56px;border-radius:50%;object-fit:cover;border:2px solid var(--crim);flex-shrink:0}
.rv-name{font-weight:700;color:var(--dark);font-size:.9rem}
.rv-loc{font-size:.78rem;color:var(--muted)}
.rv-disc{max-width:900px;margin:0 auto;font-size:.77rem;color:#8A9BB0;text-align:center;font-style:italic;line-height:1.6}

/* ── BONUSES ── */
.bonuses-section{background:var(--slatep);padding:60px 20px}
.bonuses-grid{max-width:900px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:24px}
.bonus-card{background:var(--white);border:1px solid var(--bds);border-radius:var(--r);border-top:3px solid var(--gold);padding:28px 24px;text-align:center;transition:box-shadow .3s,transform .3s}
.bonus-card:hover{box-shadow:0 6px 18px rgba(201,147,10,.12);transform:translateY(-3px)}
.bv-badge{display:inline-block;background:var(--gold);color:var(--white);font-size:.75rem;font-weight:800;padding:5px 16px;border-radius:var(--rp);text-transform:uppercase;margin-bottom:16px}
.bo-ico{font-size:2.8rem;display:block;margin-bottom:14px}
.bonus-card h4{font-size:.97rem;font-weight:800;color:var(--dark);margin-bottom:12px;line-height:1.3}
.bonus-card p{font-size:.88rem;line-height:1.7;color:var(--muted)}

/* ── GUARANTEE ── */
.guar-section{background:var(--white);padding:60px 20px}
.guar-in{max-width:1000px;margin:0 auto;display:grid;grid-template-columns:250px 1fr;align-items:center;gap:48px}
.guar-img img{max-width:100%;filter:drop-shadow(0 4px 14px rgba(196,30,58,.15))}
.guar-text h3{font-size:1.3rem;font-weight:800;color:var(--dark);margin-bottom:14px;line-height:1.25}
.guar-text p{font-size:1rem;line-height:1.8;color:var(--muted);margin-bottom:12px}
.guar-note{font-size:.82rem!important;color:#8A9BB0;font-style:italic;background:var(--crimp);border:1px solid rgba(196,30,58,.15);border-radius:var(--r);padding:10px 14px;margin-top:8px}

/* ── FAQs ── */
.faq-section{background:var(--off);padding:60px 20px}
.faq-in{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{background:var(--white);border:1px solid var(--bds);border-radius:var(--r);overflow:hidden;transition:border-color .2s}
.faq-item.open{border-color:var(--steel)}
.faq-q{width:100%;background:none;border:none;text-align:left;padding:17px 20px;font-family:'Nunito Sans',system-ui,sans-serif;font-size:.95rem;font-weight:700;color:var(--dark);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;transition:background .2s;line-height:1.4}
.faq-q:hover{background:var(--steelp)}
.faq-item.open .faq-q{background:var(--steelp);color:var(--steel)}
.fa{font-size:.88rem;transition:transform .3s;color:var(--steel);flex-shrink:0}
.faq-a{display:none;padding:14px 20px 18px;font-size:.93rem;line-height:1.78;color:var(--muted);border-top:1px solid var(--bds)}
.faq-item.open .faq-a{display:block}
.faq-item.open .fa{transform:rotate(180deg)}

/* ── ORDER ── */
.order-section{background:var(--cream);padding:60px 20px}
.order-in{max-width:860px;margin:0 auto}
.order-in p{font-size:1.01rem;line-height:1.8;color:var(--muted);margin-bottom:14px}
.order-img-wrap{text-align:center;margin-top:28px}
.order-img-wrap a img{max-width:960px;width:100%;height:auto;border-radius:var(--r);box-shadow:0 3px 16px rgba(0,0,0,.08);transition:transform .3s}
.order-img-wrap a:hover img{transform:scale(1.01)}

/* ── FINAL CTA ── */
.cta-final{background:linear-gradient(150deg,var(--dark) 0%,var(--slate) 100%);padding:64px 20px;text-align:center}
.cta-in{max-width:760px;margin:0 auto}
.cta-final h2{font-size:2rem;font-weight:800;color:var(--white);margin-bottom:10px;line-height:1.2}
.cta-sub{font-size:1rem;color:rgba(255,255,255,.6);margin-bottom:24px;display:block;font-style:italic}
.cta-ing-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-bottom:24px;padding:16px;background:rgba(255,255,255,.06);border-radius:var(--r);border:1px solid rgba(255,255,255,.1)}
.cta-ing-grid span{font-size:.82rem;font-weight:600;color:rgba(255,255,255,.8)}
.cta-perks{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 20px;margin-bottom:28px}
.cta-perks span{font-size:.87rem;font-weight:600;color:rgba(255,255,255,.8)}
.cta-disc{font-size:.73rem;color:rgba(255,255,255,.38);margin-top:14px;font-style:italic;display:block;line-height:1.65}

/* ── FOOTER ── */
footer{background:#080F18;padding:44px 20px 24px}
.ft-brand{font-size:1.3rem;font-weight:800;color:var(--steel2);text-align:center;letter-spacing:.3px;margin-bottom:4px}
.ft-tag{font-size:.82rem;color:rgba(255,255,255,.3);text-align:center;margin-bottom:20px}
.ft-ql{text-align:center;font-size:.7rem;font-weight:700;color:var(--steel);text-transform:uppercase;letter-spacing:1.5px;margin-bottom:10px}
.ft-nav{display:flex;flex-wrap:wrap;justify-content:center;background:rgba(255,255,255,.05);border-radius:var(--r);padding:14px 16px;margin-bottom:24px;gap:4px}
.ft-nav a{color:#FFFFFF;text-decoration:none;font-size:.86rem;font-weight:600;padding:5px 14px;border-right:1px solid rgba(255,255,255,.12);transition:color .2s,background .2s,border-radius .2s;white-space:nowrap}
.ft-nav a:last-child{border-right:none}
.ft-nav a:hover{color:#080F18;background:var(--steel2);border-radius:20px;border-right:1px solid transparent}
.ft-legal{max-width:1000px;margin:0 auto;border-top:1px solid rgba(255,255,255,.07);padding-top:20px}
.ft-fda-box{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:var(--r);padding:16px 20px;margin-bottom:16px}
.ft-fda-box strong{font-size:.82rem;color:var(--steel2);display:block;margin-bottom:8px}
.ft-fda-box p{font-size:.77rem;line-height:1.7;color:rgba(255,255,255,.32);margin-bottom:8px}
.ft-fda-box p:last-child{margin-bottom:0}
.ft-legal>p{font-size:.77rem;line-height:1.7;color:rgba(255,255,255,.22);margin-bottom:10px}
.ft-links{text-align:center;margin-bottom:14px;display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:6px}
.ft-links a{color:rgba(255,255,255,.5);text-decoration:none;font-size:.82rem;font-weight:500;transition:color .2s}
.ft-links a:hover{color:var(--steel2);text-decoration:underline}
.ft-links span{color:rgba(255,255,255,.15)}
.ft-copy{text-align:center;font-size:.78rem;color:rgba(255,255,255,.2)}
.ft-copy a{color:rgba(255,255,255,.35);text-decoration:none;transition:color .2s}
.ft-copy a:hover{color:var(--steel2)}

/* ── FADE-UP ── */
.fade-up{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.fade-up.visible{opacity:1;transform:translateY(0)}

/* ── RESPONSIVE ── */
@media(max-width:1040px){
  .hero-in{grid-template-columns:1fr;gap:36px}
  .hero-img a img{max-width:340px;margin:0 auto;display:block}
  .hero-text h1{font-size:1.95rem}
  .prob-in{grid-template-columns:1fr}
  .prob-stats{display:grid;grid-template-columns:1fr 1fr}
  .about-in{grid-template-columns:1fr}
  .about-img img{max-width:300px;margin:0 auto;display:block}
  .ing-grid{grid-template-columns:1fr}
  .who-grid{grid-template-columns:repeat(2,1fr)}
  .guar-in{grid-template-columns:1fr;text-align:center}
  .bonuses-grid{grid-template-columns:1fr}
}
@media(max-width:700px){
  nav{padding:0 14px}
  .nav-links{display:none}
  .burger{display:flex}
  .hero{padding:44px 16px}
  .hero-text h1{font-size:1.75rem}
  .band{padding:36px 16px 28px}
  .band h2,.band h3{font-size:1.55rem}
  .reviews-grid{grid-template-columns:1fr}
  .who-grid{grid-template-columns:1fr}
  .prob-stats{grid-template-columns:1fr}
  .tl-item{flex-direction:column;gap:12px}
  .problem-section,.about-section,.ing-section,.timeline-section,
  .who-section,.reviews-section,.bonuses-section,.guar-section,
  .faq-section,.order-section{padding:44px 16px}
  .price-img-sec{padding:24px 16px}
  .cta-final{padding:48px 16px}
  .cta-final h2{font-size:1.6rem}
  .cta-perks{flex-direction:column;align-items:center;gap:8px}
  footer{padding:36px 16px 20px}
  .ft-nav a{border-right:none;padding:5px 10px}
}