/* ============================================================
   Vizonic — 20-tablet vision support  ·  SKY-BLUE/WHITE EYE CARE
   Design derived from real Vizonic bottle: white + blue with a
   geometric eye logo. Clean, airy, "see clearly" premium eye care.
   ============================================================ */
:root{
  --blue:#1f6fd6;      /* packaging blue */
  --blue-d:#124b96;
  --sky:#dff0ff;
  --sky-2:#eef7ff;
  --navy-t:rgba(20,70,140,.92);
  --paper:#f7fbff;
  --card:#ffffff;
  --line:#dcebfa;
  --ink:#163c68;
  --muted:#5f7ea3;
  --shadow:0 16px 38px -24px rgba(31,111,214,.35);
  --r:18px;
  --font:'Inter','Segoe UI',system-ui,-apple-system,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(--paper);line-height:1.63;-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:1.16;letter-spacing:-.01em}
.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:var(--navy-t);backdrop-filter:blur(8px);box-shadow:0 1px 0 rgba(255,255,255,.08)}
.header-in{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:66px}
.brand{font-weight:800;letter-spacing:.04em;font-size:1.3rem;color:#fff}
.brand b{color:#a8d2ff}
.nav{display:flex;align-items:center;gap:22px}
.nav a{color:rgba(255,255,255,.9);font-weight:600;font-size:.92rem}
.nav a:hover{color:#fff}
.cta-btn{display:inline-block;background:linear-gradient(135deg,var(--blue),#3f8bf0);color:#fff;font-weight:800;font-size:.95rem;padding:.8rem 1.4rem;border-radius:999px;box-shadow:0 10px 24px -10px rgba(31,111,214,.8);transition:transform .15s ease,box-shadow .15s ease}
.cta-btn:hover{transform:translateY(-2px);box-shadow:0 16px 30px -12px rgba(31,111,214,.9)}
.nav .cta-btn{color:#fff;padding:.6rem 1.1rem}

/* ---------- Hero ---------- */
.hero{background:radial-gradient(120% 150% at 84% 4%,var(--sky-2) 0%,var(--sky) 48%,#d4e9ff 100%);color:var(--ink);position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;right:-120px;top:-120px;width:460px;height:460px;border:2px solid rgba(31,111,214,.18);border-radius:50%;pointer-events:none}
.hero::after{content:"";position:absolute;left:-130px;bottom:-180px;width:430px;height:430px;border:1px solid rgba(31,111,214,.12);border-radius:50%;pointer-events:none}
.hero-in{display:grid;grid-template-columns:1.08fr .92fr;gap:30px;align-items:center;padding:58px 22px 64px;position:relative}
.hero-copy{max-width:560px}
.eyebrow{display:inline-block;color:var(--blue-d);font-weight:800;letter-spacing:.14em;text-transform:uppercase;font-size:.76rem;margin-bottom:14px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:.35rem .85rem;border-radius:999px}
.hero h1{font-size:clamp(1.85rem,3.6vw,2.9rem);font-weight:800;color:#0d3b74;margin-bottom:16px}
.hero .lead{color:var(--muted);font-size:1.03rem;margin-bottom:18px;max-width:47ch}
.hero .hot{color:var(--blue-d);font-weight:700;font-size:.9rem;margin-bottom:20px}
.hero-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:22px}
.hero-actions .cta-btn{font-size:1.04rem;padding:.92rem 1.6rem}
.trust-row{display:flex;flex-direction:column;gap:7px;align-items:flex-start}
.trust-row span{display:inline-flex;align-items:center;gap:8px;color:#1c4f92;font-size:.85rem;font-weight:600}
.trust-row svg{width:16px;height:16px;color:var(--blue)}
.hero-visual{display:flex;align-items:center;justify-content:center;position:relative}
.hero-visual::before{content:"";position:absolute;width:min(360px,92%);aspect-ratio:1;border-radius:50%;background:radial-gradient(circle,rgba(63,139,240,.35),rgba(223,240,255,.05) 62%,transparent 76%)}
.hero-prod{position:relative;width:min(240px,29vw);height:auto;filter:drop-shadow(0 30px 46px rgba(18,75,150,.3))}

/* ---------- Sections ---------- */
section{padding:62px 22px}
.sec-head{max-width:720px;margin:0 auto 34px;text-align:center}
.kicker{color:var(--blue);font-weight:800;letter-spacing:.14em;text-transform:uppercase;font-size:.76rem;margin-bottom:10px}
.sec-head h2{font-size:clamp(1.55rem,2.7vw,2.2rem);color:#0d3b74;font-weight:800;margin-bottom:10px}
.sec-head p{color:var(--muted);font-size:1rem}
section#benefits,section#how,section#ingredients,section#about,section#faq{background:var(--paper)}
section#benefits .sec-head h2,section#how .sec-head h2,section#ingredients .sec-head h2,section#about .sec-head h2,section#faq .sec-head h2{color:#0d3b74}

/* benefits */
.ben-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.ben-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px;box-shadow:var(--shadow);border-top:4px solid var(--blue)}
.ben-card .ic{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,rgba(31,111,214,.16),rgba(223,240,255,.6));display:grid;place-items:center;margin-bottom:14px}
.ben-card .ic svg{width:23px;height:23px;color:var(--blue)}
.ben-card h3{color:#0d3b74;font-size:1.05rem;margin-bottom:8px}
.ben-card p{color:var(--muted);font-size:.92rem}

/* how */
.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:28px;position:relative;box-shadow:var(--shadow)}
.step .num{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,var(--blue),#3f8bf0);color:#fff;display:grid;place-items:center;font-weight:800;font-size:1.05rem;margin-bottom:14px}
.step h3{color:#0d3b74;font-size:1.05rem;margin-bottom:8px}
.step p{color:var(--muted);font-size:.92rem}

/* ingredients */
.ing-grid{display:grid;grid-template-columns:auto-fit;gap:0}
.ing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px}
.ing-card{background:linear-gradient(180deg,#ffffff,#f0f7ff);border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:14px;padding:18px;box-shadow:var(--shadow)}
.ing-card h3{color:#0d3b74;font-size:.98rem;margin-bottom:6px}
.ing-card p{color:var(--muted);font-size:.88rem}

/* about split */
#about .split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;background:linear-gradient(135deg,#0d3b74,var(--blue-d));border-radius:26px;padding:44px;color:#fff;box-shadow:var(--shadow)}
#about .split .kicker{color:#a8d2ff}
#about .split h2{color:#fff;font-size:clamp(1.4rem,2.4vw,1.9rem);margin-bottom:12px}
#about .split p.lead{color:#dcecff;font-size:1rem}
.checklist{list-style:none;margin:0 0 24px}
.checklist li{display:flex;align-items:flex-start;gap:12px;color:#e9f3ff;font-weight:600;padding:9px 0;border-bottom:1px solid rgba(255,255,255,.15);font-size:.96rem}
.checklist svg{flex:none;width:20px;height:20px;color:#a8d2ff;margin-top:3px}

/* quote */
.quote{background:linear-gradient(180deg,#dff0ff,#cfe7ff);color:#0d3b74;text-align:center}
.quote h2{font-size:clamp(1.5rem,2.6vw,2.1rem);max-width:640px;margin:0 auto 14px}
.quote p{color:var(--muted);max-width:600px;margin:0 auto 24px;font-size:1rem}

/* faq */
.faq-box{max-width:760px;margin:0 auto}
details{background:var(--card);border:1px solid var(--line);border-radius:14px;margin-bottom:12px;box-shadow:0 8px 22px -18px rgba(31,111,214,.4);overflow:hidden}
summary{list-style:none;padding:18px 20px;font-weight:700;color:#0d3b74;cursor:pointer;position:relative;padding-right:40px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);color:var(--blue);font-size:1.3rem;font-weight:800}
details[open] summary::after{content:"−"}
details .a{padding:0 20px 18px;color:var(--muted);font-size:.95rem}

/* cta band */
.cta-band{background:linear-gradient(135deg,#0d3b74,var(--blue-d));color:#fff;text-align:center}
.cta-band h2{font-size:clamp(1.6rem,3vw,2.3rem);margin-bottom:12px}
.cta-band p{color:#dcecff;max-width:620px;margin:0 auto 26px}

/* sub pages */
.simple{background:#fbfdff;padding:60px 22px}
.simple .wrap{max-width:820px}
.simple h1{color:#0d3b74;font-size:clamp(1.6rem,3vw,2.2rem);margin-bottom:20px}
.simple p{color:var(--muted);margin-bottom:14px}
.simple .tip{background:#eef6ff;border:1px solid var(--line);border-left:4px solid var(--blue);border-radius:12px;padding:16px 18px;color:#234a7a;font-size:.95rem;margin:18px 0}
.cta-wrapper{text-align:center;margin-top:28px}
.simple .how-grid{margin-top:10px}

/* ---------- Footer ---------- */
.site-footer{background:#0b2c55;color:#cfe3ff;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:.95rem;margin-bottom:12px;text-transform:uppercase;letter-spacing:.06em}
.site-footer p{font-size:.86rem;color:#9cc3ea}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:8px}
.site-footer a{color:#9cc3ea;font-size:.9rem}
.site-footer a:hover{color:#a8d2ff}
.footer-bot{border-top:1px solid rgba(255,255,255,.15);padding-top:20px;color:#7fa5cf;font-size:.82rem;text-align:center}
.font-brand{color:#fff;font-weight:800}

/* country switcher */
.lang-block{margin-bottom:28px}
.lang-label{color:#8fb2da;font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;margin-bottom:12px}
.lang-list{display:flex;flex-wrap:wrap;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,.15);color:#dcecff;padding:.5rem .85rem;border-radius:10px;font-size:.86rem;transition:.15s}
.lang-link:hover{background:rgba(63,139,240,.2);border-color:#81b6f2}
.lang-link.active{background:var(--blue);color:#fff;border-color:var(--blue);font-weight:700}
.lang-link img{display:inline-block;vertical-align:middle;margin-right:6px;border-radius:2px;flex:none;box-shadow:0 0 0 1px rgba(0,0,0,.14)}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .hero-in{grid-template-columns:1fr;text-align:center;padding:38px 22px 50px}
  .hero-copy{max-width:none;margin:0 auto}
  .hero .lead{margin-left:auto;margin-right:auto}
  .hero-actions,.trust-row{justify-content:center;align-items:center}
  .hero-visual{order:-1}
  .hero-prod{width:min(190px,46vw)}
  .ben-grid,.how-grid{grid-template-columns:1fr 1fr}
  #about .split{grid-template-columns:1fr;padding:32px}
}
@media (max-width:640px){
  .ben-grid,.how-grid,#about .split{grid-template-columns:1fr}
  .header-in{flex-direction:column;gap:10px;padding:12px 16px}
  .nav{flex-wrap:wrap;justify-content:center;gap:14px}
  .nav a{font-size:.86rem}
  .nav .cta-btn{padding:.5rem .95rem;font-size:.86rem}
  .footer-grid{grid-template-columns:1fr}
  section{padding:48px 16px}
  .hero-prod{width:min(170px,50vw)}
  .hero-in{padding-top:22px}
}