:root{
  --background:oklch(0.985 0.008 220);
  --foreground:oklch(0.18 0.04 230);
  --card:oklch(1 0 0);
  --primary:oklch(0.45 0.12 220);
  --primary-fg:oklch(0.99 0 0);
  --secondary:oklch(0.94 0.025 210);
  --muted-fg:oklch(0.5 0.03 230);
  --accent:oklch(0.7 0.13 200);
  --border:oklch(0.9 0.02 220);
  --radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--background);color:var(--foreground);line-height:1.5;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:1152px;margin:0 auto;padding:0 24px}
.narrow{max-width:768px;margin:0 auto;padding:0 24px}
.center{text-align:center}
.muted{color:var(--muted-fg)}
.ad-bar{background:var(--secondary);text-align:center;font-size:11px;letter-spacing:.25em;text-transform:uppercase;color:var(--muted-fg);padding:8px 0}
header.site{border-bottom:1px solid var(--border);background:var(--background)}
header.site .inner{display:flex;align-items:center;justify-content:center;gap:12px;padding:20px 24px;max-width:1152px;margin:0 auto}
.logo-mark{width:40px;height:40px;border-radius:10px;background:var(--primary);color:var(--primary-fg);display:flex;align-items:center;justify-content:center;font-weight:800}
.brand{font-size:20px;font-weight:700;letter-spacing:-.01em}
.hero{background:color-mix(in oklab,var(--secondary) 40%,transparent)}
.hero-inner{max-width:768px;margin:0 auto;padding:64px 24px;text-align:center}
.eyebrow{font-size:12px;letter-spacing:.3em;text-transform:uppercase;color:var(--accent);font-weight:700;margin-bottom:24px}
h1{font-size:clamp(34px,5vw,60px);line-height:1.1;letter-spacing:-.02em;margin:0;font-weight:800}
.lead{font-size:18px;color:var(--muted-fg);max-width:560px;margin:32px auto 0}
.byline{font-size:14px;color:var(--muted-fg);margin-top:24px}
.hero-img-wrap{max-width:1152px;margin:0 auto;padding:0 24px 64px}
.hero-img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:16px;box-shadow:0 20px 50px -20px rgba(0,0,0,.2)}
.caption{text-align:center;font-style:italic;color:var(--muted-fg);font-size:14px;margin-top:16px}
article.story{max-width:768px;margin:0 auto;padding:64px 24px;font-size:18px;line-height:1.7}
article.story h2{font-size:30px;letter-spacing:-.01em;margin:0 0 24px;font-weight:800}
article.story h3{font-size:24px;letter-spacing:-.01em;margin:0 0 16px;font-weight:800}
article.story p{margin:0 0 20px}
.figure-square{margin:48px auto;max-width:420px}
.figure-square img{aspect-ratio:1/1;object-fit:cover;border-radius:16px;box-shadow:0 15px 40px -15px rgba(0,0,0,.2)}
.figure-wide{margin:48px 0}
.figure-wide img{aspect-ratio:16/10;object-fit:cover;border-radius:16px;box-shadow:0 15px 40px -15px rgba(0,0,0,.2)}
.quality{background:color-mix(in oklab,var(--secondary) 40%,transparent);padding:64px 0}
.highlight{text-align:center;color:var(--primary);font-size:20px;font-weight:600;margin-top:24px}
.tri-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:48px 0}
.tri-grid img{aspect-ratio:1/1;object-fit:cover;border-radius:12px;box-shadow:0 6px 18px rgba(0,0,0,.08)}
.product{background:color-mix(in oklab,var(--secondary) 40%,transparent);padding:64px 0}
.product-card{max-width:768px;margin:0 auto;background:var(--card);border-radius:16px;overflow:hidden;box-shadow:0 25px 60px -25px rgba(0,0,0,.25)}
.product-card>img{aspect-ratio:3/2;object-fit:cover;width:100%}
.product-body{padding:40px}
.product-body h2{font-size:30px;margin:0;letter-spacing:-.01em;font-weight:800}
.price{font-size:36px;font-weight:800;color:var(--primary);margin:24px 0 4px}
.specs{list-style:none;padding:24px 0;margin:24px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);font-size:14px}
.specs li{display:flex;justify-content:space-between;gap:16px;padding:6px 0}
.specs li span:first-child{font-weight:600}
.specs li span:last-child{color:var(--muted-fg);text-align:right}
.btn{display:inline-flex;align-items:center;justify-content:center;background:var(--primary);color:var(--primary-fg);padding:16px 32px;border-radius:12px;font-weight:700;font-size:16px;border:none;cursor:pointer;box-shadow:0 8px 20px -8px color-mix(in oklab,var(--primary) 50%,transparent);transition:transform .15s,box-shadow .15s}
.btn:hover{transform:translateY(-1px);box-shadow:0 12px 28px -10px color-mix(in oklab,var(--primary) 60%,transparent)}
.btn-block{display:block;width:100%}
.cta{padding:80px 0}
.cta h2{font-size:clamp(28px,4vw,40px);letter-spacing:-.02em;margin:0;font-weight:800}
.sticky{position:sticky;bottom:0;background:color-mix(in oklab,var(--background) 95%,transparent);backdrop-filter:blur(8px);border-top:1px solid var(--border);padding:12px 16px;display:none;z-index:40;box-shadow:0 -4px 20px rgba(0,0,0,.05)}
.sticky .row{display:flex;align-items:center;justify-content:space-between;gap:12px}
.sticky .name{font-size:14px;font-weight:700}
.sticky .price{font-size:14px;margin:0}
.sticky .btn{padding:10px 20px;font-size:14px}
footer{border-top:1px solid var(--border);padding:32px 0;text-align:center;color:var(--muted-fg);font-size:12px}
@media (max-width:640px){
  .sticky{display:block}
  .tri-grid{grid-template-columns:1fr}
  article.story{padding:48px 24px}
  .product-body{padding:28px}
}
/* checkout */
.checkout-wrap{background:color-mix(in oklab,var(--secondary) 40%,transparent);min-height:100vh}
.checkout-grid{display:grid;grid-template-columns:1fr 380px;gap:32px;padding:40px 0}
@media (max-width:900px){.checkout-grid{grid-template-columns:1fr}}
.panel{background:var(--card);border-radius:16px;padding:28px;box-shadow:0 4px 12px rgba(0,0,0,.04);margin-bottom:24px}
.panel h2{margin:0 0 20px;font-size:20px;font-weight:800}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:520px){.grid2{grid-template-columns:1fr}}
label.field{display:block;margin-bottom:0}
label.field>span{display:block;font-size:14px;font-weight:600;margin-bottom:6px}
.input,select.input,textarea.input{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:10px;background:var(--background);color:var(--foreground);font:inherit;outline:none;transition:border-color .15s,box-shadow .15s}
.input:focus{border-color:var(--primary);box-shadow:0 0 0 3px color-mix(in oklab,var(--primary) 20%,transparent)}
.checkbox{display:flex;gap:12px;align-items:flex-start;font-size:14px;color:var(--muted-fg);margin:16px 0}
.checkbox input{margin-top:4px}
aside.summary{background:var(--card);border-radius:16px;padding:24px;box-shadow:0 8px 24px rgba(0,0,0,.06);align-self:start;position:sticky;top:24px}
aside.summary h2{margin:0 0 16px;font-size:20px;font-weight:800}
.sum-row{display:flex;justify-content:space-between;font-size:14px;padding:6px 0}
.sum-row.total{font-size:20px;font-weight:800;border-top:1px solid var(--border);padding-top:16px;margin-top:8px}
.sum-row.total .price{color:var(--primary);font-size:24px;margin:0}
.product-row{display:flex;gap:16px;align-items:center;margin-bottom:16px}
.product-row img{width:80px;height:80px;border-radius:10px;object-fit:cover}
.benefits{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}
.benefit{background:color-mix(in oklab,var(--secondary) 60%,transparent);border-radius:10px;padding:12px;font-size:12px;display:flex;gap:8px}
.benefit::before{content:"✓";color:var(--primary);font-weight:800}
.success{max-width:560px;margin:80px auto;background:var(--card);border-radius:16px;padding:48px;text-align:center;box-shadow:0 25px 60px -25px rgba(0,0,0,.25)}
.success .check{width:64px;height:64px;border-radius:50%;background:var(--primary);color:var(--primary-fg);display:flex;align-items:center;justify-content:center;margin:0 auto 24px;font-size:32px}
.back{display:inline-block;margin-top:24px;color:var(--primary);font-weight:700}
.back:hover{text-decoration:underline}