/* ===== FRONTIER LABS ===== */
:root{
  --navy:#0B2239;
  --navy-2:#123454;
  --teal:#1B9DC4;
  --teal-dk:#147B9B;
  --ink:#12212F;
  --muted:#5B7183;
  --line:#DDE5EC;
  --bg:#FFFFFF;
  --bg-soft:#F4F8FB;
  --amber:#B4720E;
  --amber-bg:#FFF8EC;
  --radius:10px;
  --shadow:0 1px 3px rgba(11,34,57,.08), 0 8px 28px rgba(11,34,57,.06);
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--teal-dk);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{font-family:"Inter",sans-serif;color:var(--navy);line-height:1.2;margin:0 0 .5em;letter-spacing:-.02em}
h1{font-size:clamp(2rem,4vw,3rem);font-weight:800}
h2{font-size:clamp(1.5rem,2.6vw,2.15rem);font-weight:750}
h3{font-size:1.15rem;font-weight:700}
p{margin:0 0 1em}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.narrow{max-width:820px}
.section{padding:72px 0}
.section--soft{background:var(--bg-soft)}
.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.72rem;font-weight:700;color:var(--teal-dk);margin-bottom:.6rem}
.lead{font-size:1.075rem;color:var(--muted)}
.center{text-align:center}
.mt0{margin-top:0}

/* ---- Buttons ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.75rem 1.5rem;border-radius:6px;border:1px solid transparent;
  font-weight:650;font-size:.925rem;cursor:pointer;transition:.15s;text-decoration:none;
  font-family:inherit;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn--primary{background:var(--teal);color:#fff}
.btn--primary:hover{background:var(--teal-dk);color:#fff}
.btn--dark{background:var(--navy);color:#fff}
.btn--dark:hover{background:var(--navy-2);color:#fff}
.btn--ghost{background:transparent;color:var(--navy);border-color:var(--line)}
.btn--ghost:hover{border-color:var(--teal);color:var(--teal-dk)}
.btn--block{width:100%}
.btn--sm{padding:.5rem 1rem;font-size:.85rem}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}

/* ---- Top compliance strip ---- */
.topbar{
  background:var(--navy);color:#C9DDEA;font-size:.775rem;letter-spacing:.03em;
  text-align:center;padding:.5rem 24px;font-weight:500;
}
.topbar strong{color:#fff;font-weight:700}

/* ---- Header ---- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:24px;padding:14px 24px;max-width:var(--wrap);margin:0 auto}
.brand img{height:44px;width:auto}
.nav{display:flex;gap:28px;margin-left:auto}
.nav a{color:var(--navy);font-weight:600;font-size:.9rem;letter-spacing:.03em;text-transform:uppercase;padding:6px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a[aria-current="page"]{color:var(--teal-dk);border-bottom-color:var(--teal);text-decoration:none}
.header-actions{display:flex;align-items:center;gap:14px}
.cart-btn{position:relative;background:none;border:1px solid var(--line);border-radius:6px;padding:.5rem .9rem;font-weight:650;font-size:.85rem;color:var(--navy);cursor:pointer;font-family:inherit}
.cart-btn:hover{border-color:var(--teal)}
.cart-count{display:inline-block;min-width:20px;padding:0 5px;margin-left:6px;background:var(--teal);color:#fff;border-radius:10px;font-size:.72rem;line-height:20px;text-align:center}
.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:.45rem .7rem;font-size:1.1rem;cursor:pointer}

/* ---- Hero ---- */
.hero{position:relative;background:var(--navy);color:#fff;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(11,34,57,.94) 0%,rgba(11,34,57,.80) 45%,rgba(11,34,57,.35) 100%)}
.hero img.hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.85}
.hero-inner{position:relative;z-index:2;max-width:var(--wrap);margin:0 auto;padding:96px 24px 88px}
.hero h1{color:#fff;max-width:16ch}
.hero p{color:#C4D8E6;max-width:52ch;font-size:1.08rem}
.hero .eyebrow{color:#66C6E4}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;margin-top:36px}
.badge{border:1px solid rgba(255,255,255,.28);border-radius:99px;padding:.35rem .9rem;font-size:.775rem;color:#D6E7F1;letter-spacing:.04em}

/* ---- Marquee ---- */
.marquee{background:var(--teal);color:#fff;overflow:hidden;padding:.7rem 0;white-space:nowrap;font-size:.8rem;letter-spacing:.09em;font-weight:600;text-transform:uppercase}
.marquee span{display:inline-block;padding-left:100%;animation:scroll 32s linear infinite}
@keyframes scroll{0%{transform:translateX(0)}100%{transform:translateX(-100%)}}
@media (prefers-reduced-motion:reduce){.marquee span{animation:none;padding-left:0;white-space:normal;display:block;text-align:center}}

/* ---- RUO callout ---- */
.ruo-note{
  border:1px solid #E8D3AC;background:var(--amber-bg);color:#5A4212;
  border-radius:var(--radius);padding:14px 18px;font-size:.85rem;line-height:1.55;
}
.ruo-note strong{color:var(--amber);text-transform:uppercase;letter-spacing:.06em;font-size:.78rem}

/* ---- Grids ---- */
.grid{display:grid;gap:24px}
.grid--4{grid-template-columns:repeat(4,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}

/* ---- Product card ---- */
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;display:flex;flex-direction:column;transition:.18s;
}
.card:hover{box-shadow:var(--shadow);border-color:#C6D6E2;transform:translateY(-2px)}
.card-media{position:relative;background:var(--bg-soft);aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;padding:8px}
.card-media img{width:100%;height:100%;object-fit:contain}
.card-flag{position:absolute;top:10px;left:10px;background:var(--navy);color:#fff;font-size:.66rem;letter-spacing:.09em;text-transform:uppercase;font-weight:700;padding:.28rem .55rem;border-radius:4px}
.card-flag--sale{background:#B4331E}
.card-body{padding:16px 18px 20px;display:flex;flex-direction:column;flex:1}
.card-cat{font-size:.68rem;text-transform:uppercase;letter-spacing:.11em;color:var(--muted);font-weight:700;margin-bottom:6px}
.card-title{font-size:1rem;font-weight:700;color:var(--navy);margin:0 0 2px;line-height:1.3}
.card-title a{color:inherit}
.card-strength{font-size:.83rem;color:var(--muted);margin-bottom:10px}
.card-price{font-size:1.15rem;font-weight:750;color:var(--navy);margin-top:auto;margin-bottom:12px}
.card-price del{color:var(--muted);font-weight:400;font-size:.9rem;margin-right:6px}
.card-ruo{font-size:.66rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase;margin-top:10px}

/* ---- Feature blocks ---- */
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.feature .ico{width:38px;height:38px;border-radius:8px;background:#E4F3F8;color:var(--teal-dk);display:flex;align-items:center;justify-content:center;margin-bottom:14px;font-weight:800}
.feature h3{margin-bottom:.35em}
.feature p{color:var(--muted);font-size:.9rem;margin:0}

/* ---- Split ---- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}

/* ---- Shop layout ---- */
.shop-layout{display:grid;grid-template-columns:230px 1fr;gap:40px;align-items:start}
.filters{position:sticky;top:96px;border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.filters h4{font-size:.72rem;text-transform:uppercase;letter-spacing:.11em;color:var(--muted);margin:0 0 10px}
.filters ul{list-style:none;margin:0 0 22px;padding:0}
.filters li{margin-bottom:6px}
.filters button{background:none;border:none;padding:4px 0;font:inherit;font-size:.9rem;color:var(--ink);cursor:pointer;text-align:left;width:100%}
.filters button:hover{color:var(--teal-dk)}
.filters button[aria-pressed="true"]{color:var(--teal-dk);font-weight:700}
.shop-bar{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:24px}
.shop-bar .count{color:var(--muted);font-size:.875rem;margin-right:auto}
select,input[type=text],input[type=email],textarea{
  font:inherit;font-size:.9rem;padding:.55rem .7rem;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--ink);
}
select:focus,input:focus,textarea:focus{outline:2px solid var(--teal);outline-offset:1px;border-color:var(--teal)}

/* ---- Product detail ---- */
.pdp{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.pdp-media{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:24px;position:sticky;top:100px}
.pdp-price{font-size:1.9rem;font-weight:800;color:var(--navy);margin:6px 0 4px}
.pdp-price del{font-size:1.05rem;color:var(--muted);font-weight:400;margin-right:8px}
.qty{display:flex;align-items:center;gap:0;border:1px solid var(--line);border-radius:6px;overflow:hidden;width:fit-content}
.qty button{background:var(--bg-soft);border:none;width:38px;height:42px;font-size:1.1rem;cursor:pointer;color:var(--navy)}
.qty input{width:52px;height:42px;border:none;text-align:center;font:inherit;font-weight:650}
.spec-table{width:100%;border-collapse:collapse;font-size:.9rem;margin:0 0 24px}
.spec-table th,.spec-table td{text-align:left;padding:.6rem .8rem;border-bottom:1px solid var(--line);vertical-align:top}
.spec-table th{width:42%;color:var(--muted);font-weight:600}
.spec-table td{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.845rem;word-break:break-word}
.acc{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-bottom:12px}
.acc summary{padding:14px 18px;font-weight:650;cursor:pointer;background:var(--bg-soft);font-size:.925rem;list-style:none}
.acc summary::-webkit-details-marker{display:none}
.acc summary::after{content:"+";float:right;color:var(--teal-dk);font-weight:700}
.acc[open] summary::after{content:"–"}
.acc .acc-body{padding:16px 18px;font-size:.9rem;color:var(--muted)}
.acc .acc-body p:last-child{margin-bottom:0}

/* ---- FAQ ---- */
.faq{max-width:820px;margin:0 auto}

/* ---- Cart ---- */
.cart-table{width:100%;border-collapse:collapse}
.cart-table th{text-align:left;font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);padding:0 12px 12px;border-bottom:1px solid var(--line)}
.cart-table td{padding:16px 12px;border-bottom:1px solid var(--line);vertical-align:middle}
.cart-table img{width:64px;height:64px;object-fit:contain;background:var(--bg-soft);border-radius:6px}
.cart-summary{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:var(--bg-soft)}
.sum-row{display:flex;justify-content:space-between;padding:.4rem 0;font-size:.925rem}
.sum-row--total{border-top:1px solid var(--line);margin-top:10px;padding-top:14px;font-size:1.15rem;font-weight:750;color:var(--navy)}
.attest{display:flex;gap:10px;align-items:flex-start;font-size:.82rem;color:var(--muted);margin:18px 0;line-height:1.5}
.attest input{margin-top:3px;flex-shrink:0;width:16px;height:16px;accent-color:var(--teal)}

/* ---- Forms ---- */
.field{margin-bottom:16px}
.field label{display:block;font-size:.82rem;font-weight:650;color:var(--navy);margin-bottom:5px}
.field input,.field textarea,.field select{width:100%}

/* ---- Legal pages ---- */
.legal{max-width:820px;margin:0 auto}
.legal h2{margin-top:2.2em;font-size:1.35rem}
.legal h3{margin-top:1.8em;font-size:1.05rem}
.legal ul,.legal ol{padding-left:1.3em;color:var(--ink)}
.legal li{margin-bottom:.5em}
.legal .updated{color:var(--muted);font-size:.85rem;border-bottom:1px solid var(--line);padding-bottom:1.2em}

/* ---- Footer ---- */
.site-footer{background:var(--navy);color:#9FBBCE;margin-top:0;font-size:.875rem}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:60px 24px 44px;max-width:var(--wrap);margin:0 auto}
.site-footer h4{color:#fff;font-size:.75rem;text-transform:uppercase;letter-spacing:.13em;margin-bottom:16px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:9px}
.site-footer a{color:#9FBBCE}
.site-footer a:hover{color:#fff}
.footer-logo{background:#fff;border-radius:8px;padding:12px 16px;display:inline-block;margin-bottom:16px}
.footer-logo img{height:38px}
.disclaimer-block{border-top:1px solid rgba(255,255,255,.13);padding:34px 24px;max-width:var(--wrap);margin:0 auto}
.disclaimer-block h5{color:#fff;font-size:.78rem;text-transform:uppercase;letter-spacing:.13em;margin:0 0 12px}
.disclaimer-block p{font-size:.775rem;line-height:1.65;color:#8FAAC0;margin-bottom:1em}
.disclaimer-block p.caps{text-transform:uppercase;letter-spacing:.02em;color:#A9C3D6}
.footer-bottom{border-top:1px solid rgba(255,255,255,.13);padding:20px 24px;max-width:var(--wrap);margin:0 auto;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.78rem}

/* ---- Age gate ---- */
.gate{position:fixed;inset:0;z-index:9999;background:rgba(6,20,33,.97);display:flex;align-items:center;justify-content:center;padding:24px;overflow-y:auto}
.gate[hidden]{display:none}
.gate-card{background:#fff;border-radius:12px;max-width:520px;width:100%;padding:38px 34px;text-align:center;box-shadow:0 24px 60px rgba(0,0,0,.4)}
.gate-card img{height:52px;margin:0 auto 22px}
.gate-card h2{font-size:1.35rem}
.gate-card .ruo-note{text-align:left;margin:20px 0 24px}
.gate-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---- Toast ---- */
.toast{position:fixed;bottom:24px;right:24px;z-index:200;background:var(--navy);color:#fff;padding:.85rem 1.2rem;border-radius:8px;font-size:.875rem;box-shadow:var(--shadow);opacity:0;transform:translateY(10px);transition:.25s;pointer-events:none}
.toast.show{opacity:1;transform:none}

.empty{text-align:center;padding:64px 20px;color:var(--muted)}

/* ---- Responsive ---- */
@media (max-width:1000px){
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .shop-layout{grid-template-columns:1fr}
  .filters{position:static}
  .pdp{grid-template-columns:1fr;gap:32px}
  .pdp-media{position:static}
  .split{grid-template-columns:1fr;gap:32px}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:720px){
  .section{padding:52px 0}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;gap:0;padding:8px 24px 18px}
  .nav.open{display:flex}
  .nav a{padding:11px 0;border-bottom:1px solid var(--line)}
  .menu-toggle{display:block;order:-1}
  .header-inner{position:relative;gap:12px}
  .brand img{height:36px}
  .grid--3,.grid--2{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
  .hero-inner{padding:64px 24px 56px}
  .cart-table thead{display:none}
  .cart-table tr{display:grid;grid-template-columns:76px 1fr;gap:0 14px;padding:14px 0;border-bottom:1px solid var(--line)}
  .cart-table td{border:none;padding:2px 0}
  .cart-table td:first-child{grid-row:span 4}
}
@media (max-width:420px){
  .grid--4{grid-template-columns:1fr}
}