/* ============================================================
   HondroFrost — "Ice Cold Joint Gel" (50 ml topical).
   Design language: "SCIENCE-COLD" — deep navy + ice cyan + white.
   Strip archetype on an icy navy base with a cold-gradient under-bar.
   The deep-navvy, technical sibling to Icexin's bright sporty cyan.
   ============================================================ */
:root{
  --ink:#e7f5fd;            /* text on navy/light hero */
  --ink2:#071d33;
  --muted:#cfe6f4;
  --accent:#3ce0ff;
  --accent-d:#0984b6;
  --deep:#081f38;
  --deep2:#062444;
  --frost:#e9f7fe;
  --bg:#f3fafd;
  --card:#ffffff;
  --line:#cfe6f2;
  --grad:linear-gradient(100deg,#27d8ff 0%,#0b63c2 100%);
  --btn:linear-gradient(100deg,#0c6dbc 0%,#0a4f9e 100%);
  --glow:rgba(60,224,255,.42);
  --font:'Segoe UI',system-ui,-apple-system,'Helvetica Neue',Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
html[lang^="ar"]{direction:rtl}
html[lang^="ar"] body{text-align:right}
body{font-family:var(--font);color:var(--ink2);background:var(--bg);line-height:1.62;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
.wrap{max-width:1160px;margin:0 auto;padding:0 22px}
h1,h2,h3{line-height:1.12;letter-spacing:-.015em}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---- header: deep navy, frost accent ---- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(7,27,47,.96);backdrop-filter:blur(10px);box-shadow:0 1px 0 rgba(255,255,255,.05)}
.header-in{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:68px}
.brand{font-weight:800;letter-spacing:.02em;font-size:1.3rem;color:#fff}
.brand b{color:var(--accent)}
.nav{display:flex;align-items:center;gap:22px}
.nav a{color:#cfe6f4;font-weight:600;font-size:.92rem;border-bottom:2px solid transparent;padding-bottom:3px;transition:.15s}
.nav a:hover{color:#fff;border-bottom-color:var(--accent)}
.cta-btn{display:inline-block;background:var(--btn);color:#fff;font-weight:800;font-size:.96rem;padding:.84rem 1.5rem;border-radius:10px;box-shadow:0 12px 24px -12px rgba(11,99,194,.8);transition:transform .15s ease,box-shadow .15s ease}
.cta-btn:hover{transform:translateY(-2px);box-shadow:0 16px 30px -12px rgba(60,224,255,.5)}
.nav .cta-btn{color:#fff;padding:.55rem 1.15rem}

/* ---- hero: strip archetype on icy deep-navy base ---- */
.hero.hero-strip{background:
  radial-gradient(130% 150% at 82% -10%,#0f4e7c 0%,var(--deep) 58%);
  color:#eaf7ff}
.hero-strip::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background:radial-gradient(circle at 18% 110%,rgba(60,224,255,.16),transparent 42%)}
.hero-strip .wrap{position:relative}
.eyebrow{display:inline-block;color:var(--accent);font-weight:800;letter-spacing:.16em;text-transform:uppercase;font-size:.72rem;background:rgba(60,224,255,.12);border:1px solid rgba(60,224,255,.35);padding:.34rem .9rem;border-radius:999px}
.hero-strip h1{color:#fff;font-size:clamp(2.1rem,4.8vw,3.3rem)}
.hero-strip h1 em,.hero-strip s{font-style:normal}
.hero-strip .lead{color:#cfe6f4}
.hero-strip .hot{color:var(--accent);font-weight:700;font-size:.9rem;margin-top:16px}
.hero-strip .hero-visual::before{content:"";position:absolute;top:50%;left:50%;translate:-50% -50%;width:min(400px,70%);aspect-ratio:1;border-radius:50%;pointer-events:none;background:radial-gradient(circle,rgba(60,224,255,.26),rgba(60,224,255,0) 68%)}
.hero-strip .hero-prod{width:min(300px,34vw);filter:drop-shadow(0 30px 44px rgba(0,10,25,.5))}
.hero-actions .cta-btn{font-size:1.05rem;padding:.95rem 1.7rem}
/* cold-gradient accent bar under the strip hero */
.strip-bar{background:var(--btn);border-top:1px solid rgba(255,255,255,.2)}
.strip-bar ul{color:#fff;list-style:none;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin:0;padding:20px 24px}
.strip-bar li{display:flex;align-items:center;gap:10px;font-weight:700;font-size:.92rem;text-shadow:0 1px 2px rgba(0,20,40,.25)}
.strip-bar li::before{content:"";width:9px;height:9px;flex:none;border-radius:50%;background:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.25)}

/* ---- sections: pale arctic surfaces, navy accents ---- */
section{padding:64px 22px}
.sec-head{max-width:740px;margin:0 auto 36px;text-align:center}
.kicker{color:var(--accent-d);font-weight:800;letter-spacing:.15em;text-transform:uppercase;font-size:.73rem;margin-bottom:10px;display:inline-block;position:relative}
.kicker::before,.kicker::after{content:"";position:absolute;top:50%;width:22px;height:1px;background:var(--accent-d);transform:translateY(-50%)}
.kicker::before{right:calc(100% + 8px)}
.kicker::after{left:calc(100% + 8px)}
.kicker{background:var(--bg)}
.sec-head h2{font-size:clamp(1.55rem,2.7vw,2.25rem);color:var(--ink2);font-weight:800;margin-bottom:12px}
.sec-head h2::after{content:"";display:block;width:0;height:0;border-left:9px solid transparent;border-right:9px solid transparent;border-top:10px solid var(--accent-d);margin:16px auto 0}
.sec-head p{color:#51708a;font-size:1rem;max-width:62ch;margin:0 auto}
section#benefits{background:var(--bg)}
section#how{background:linear-gradient(180deg,var(--bg),#eaf7fe)}
section#ingredients{background:#fff}
section#about{background:linear-gradient(180deg,#eaf7fe,var(--bg))}
section#faq{background:#fff}

.ben-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ben-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:26px 24px;box-shadow:0 14px 30px -22px rgba(6,36,68,.35);border-bottom:4px solid var(--accent-d)}
.ben-card .ic{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#daf5ff,#bfe9fa);display:grid;place-items:center;margin-bottom:14px}
.ben-card .ic svg{width:24px;height:24px;color:var(--accent-d)}
.ben-card h3{color:var(--ink2);font-size:1.06rem;margin-bottom:8px}
.ben-card p{color:#5a7189;font-size:.92rem}

.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:28px 24px;box-shadow:0 14px 30px -22px rgba(6,36,68,.35)}
.step .num{width:46px;height:46px;border-radius:12px;background:var(--deep);color:var(--accent);display:grid;place-items:center;font-weight:800;font-size:1.1rem;margin-bottom:14px;border:1px solid rgba(60,224,255,.4);box-shadow:0 0 0 4px rgba(60,224,255,.12)}
.step h3{color:var(--ink2);font-size:1.05rem;margin-bottom:8px}
.step p{color:#5a7189;font-size:.92rem}

.ing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.ing-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 18px 18px 20px;box-shadow:0 12px 26px -24px rgba(6,36,68,.5);border-left:4px solid var(--grad);background:linear-gradient(180deg,#fff,#f2fafd)}
.ing-card h3{color:var(--ink2);font-size:.98rem;margin-bottom:6px}
.ing-card p{color:#5a7189;font-size:.88rem}

/* split (about) */
#about .split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;background:linear-gradient(120deg,#06203a,#0b438a);border-radius:18px;padding:46px;color:#eaf7ff;box-shadow:0 22px 44px -26px rgba(4,25,48,.75)}
#about .split .kicker{color:var(--accent);background:transparent}
#about .split h2{color:#fff;font-size:clamp(1.4rem,2.4vw,1.9rem);margin-bottom:12px}
#about .split p.lead{color:#cfe6f4;font-size:1rem}
.checklist{list-style:none;margin:0 0 24px}
.checklist li{display:flex;align-items:flex-start;gap:12px;color:#dff3fc;font-weight:600;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.18);font-size:.96rem}
.checklist svg{flex:none;width:20px;height:20px;color:var(--accent);margin-top:3px}

/* quote */
.quote{background:linear-gradient(180deg,#eaf7fe,#d5f0fc);color:var(--ink2);text-align:center}
.quote h2{font-size:clamp(1.5rem,2.6vw,2.15rem);max-width:680px;margin:0 auto 14px}
.quote p{color:var(--accent-d);max-width:620px;margin:0 auto 26px;font-size:1rem}
.quote .cta-btn{background:var(--btn);color:#fff}

/* faq */
.faq-box{max-width:780px;margin:0 auto}
details{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;box-shadow:0 10px 24px -22px rgba(6,36,68,.5);overflow:hidden}
summary{list-style:none;padding:18px 46px 18px 20px;font-weight:700;color:var(--ink2);cursor:pointer;position:relative}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);color:var(--accent-d);font-size:1.3rem;font-weight:800}
details[open] summary::after{content:"−"}
details .a{padding:0 20px 18px;color:#5a7189;font-size:.95rem}

/* cta band */
.cta-band{background:var(--btn);color:#fff;text-align:center;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;top:-70%;right:-8%;width:55%;height:230%;background:radial-gradient(circle,rgba(255,255,255,.28),transparent 58%)}
.cta-band .wrap{position:relative}
.cta-band h2{font-size:clamp(1.6rem,3vw,2.3rem);margin-bottom:12px}
.cta-band p{color:#eaf7ff;max-width:620px;margin:0 auto 26px}
.cta-band .cta-btn{background:#06203a;color:#fff;box-shadow:0 14px 28px -12px rgba(3,18,36,.6)}

/* simple subpages */
.simple{background:var(--bg);padding:60px 22px}
.simple .wrap{max-width:820px}
.simple .sec-head h1{color:var(--ink2);font-size:clamp(1.6rem,3vw,2.2rem);margin-bottom:8px}
.simple .sec-head h1::after{content:"";display:block;width:0;height:0;border-left:9px solid transparent;border-right:9px solid transparent;border-top:10px solid var(--accent-d);margin:16px auto 0}
.simple p{color:#51708a;margin-bottom:14px}
.simple .tip{background:var(--frost);border:1px solid var(--line);border-left:4px solid var(--accent-d);border-radius:12px;padding:16px 18px;color:var(--accent-d);font-size:.95rem;margin:18px 0}
.cta-wrapper{text-align:center;margin-top:28px}
.simple h2{color:var(--ink2);font-size:1.3rem;margin:26px 0 12px}

/* footer */
.site-footer{background:#051a30;color:#c6def0;padding:52px 22px 30px}
.footer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-bottom:30px}
.site-footer h4{color:#fff;font-size:.92rem;margin-bottom:12px;text-transform:uppercase;letter-spacing:.06em}
.site-footer p{font-size:.86rem;color:#9cc6df}
.site-footer ul{list-style:none;display:flex;flex-direction:column}
.site-footer li{margin-bottom:8px}
.site-footer a{color:#b3d7ec;font-size:.9rem}
.site-footer a:hover{color:var(--accent)}
.ft-buy{display:inline-block;background:var(--btn);color:#fff !important;font-weight:700;padding:9px 18px;border-radius:999px;margin-bottom:6px;box-shadow:0 4px 14px rgba(0,0,0,.3)}
.ft-buy:hover{filter:brightness(1.08);color:#fff}
.footer-grid{align-items:start}
.ft-brand p{max-width:38ch;opacity:.9}
.footer-bot{border-top:1px solid rgba(255,255,255,.14);padding-top:20px;color:#8fb7d2;font-size:.82rem;text-align:center}
.lang-block{margin-bottom:28px}
.lang-label{color:#9cc6df;font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;margin-bottom:12px}
.lang-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
.lang-link{display:flex;align-items:center;gap:10px;min-height:56px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.16);color:#e6f5fc;padding:.45rem .7rem;border-radius:10px;font-size:.86rem;transition:.15s;overflow:hidden}
.lang-link:hover{background:rgba(60,224,255,.12);border-color:var(--accent)}
.lang-link.active{background:var(--btn);color:#fff;border-color:var(--accent);font-weight:700}
.lang-link img{display:inline-block;vertical-align:middle;width:22px;height:15px;object-fit:cover;flex:none;border-radius:2px}
.lang-link span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* focus states */
a:focus-visible,summary:focus-visible{outline:3px solid rgba(60,224,255,.65);outline-offset:2px;border-radius:6px}
.cta-btn:focus-visible{outline:3px solid rgba(11,156,214,.7);outline-offset:3px}

/* responsive */
@media (max-width:960px){.ben-grid,.how-grid{grid-template-columns:1fr 1fr}#about .split{grid-template-columns:1fr;padding:32px}}
@media (max-width:720px){
  .site-header{position:static}
  .header-in{flex-direction:column;gap:10px;padding:12px 14px;height:auto;flex-wrap:wrap}
  .nav{flex-wrap:wrap;justify-content:center;row-gap:8px}
  .nav a{font-size:.86rem}
  .nav .cta-btn{padding:.5rem 1rem}
  .ben-grid,.how-grid,.ing-grid{grid-template-columns:1fr}
  section{padding:48px 16px}
  .strip-bar ul{gap:10px;padding:16px}
  .strip-bar li{font-size:.84rem}
  .hero-strip .hero-prod{width:min(200px,55vw)}
}
@media (max-width:640px){
  .sec-head h2{font-size:1.55rem}
  .hero-strip h1{font-size:1.9rem}
  .lang-list{grid-template-columns:1fr 1fr}
}
@media (max-width:460px){
  .lang-link{min-height:52px;font-size:.8rem;padding:6px 10px}
  .footer-bot{text-align:center}
}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
/* QA 2026-08-23: footer wide on mobile (Assistance col overflows) -> collapse + clamp decor */
@media (max-width:720px){.footer-grid{grid-template-columns:1fr;gap:18px}}
html,body{width:100%;max-width:100%;overflow-x:hidden}