:root{
  --c-primary:#1F4D3A;
  --c-primary-dark:#153328;
  --c-gold:#C79A3A;
  --c-gold-soft:color-mix(in srgb, var(--c-gold) 32%, transparent);
  --c-ink:#17231C;
  --c-bg:#F5F6F0;
  --c-bg-alt:color-mix(in srgb, var(--c-primary) 5%, var(--c-bg));
  --c-line:color-mix(in srgb, var(--c-ink) 14%, transparent);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;color:var(--c-ink);background:var(--c-bg);line-height:1.65;font-size:16px}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
h1,h2,h3{font-family:'Instrument Serif',Georgia,serif;font-weight:400;line-height:1.06;color:var(--c-primary);letter-spacing:-.01em}
a{color:inherit}
img{max-width:100%}
.kicker{font-family:'Inter',sans-serif;font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--c-gold);margin-bottom:14px;display:block}

/* header */
header.nav{position:sticky;top:0;z-index:20;background:color-mix(in srgb, var(--c-bg) 90%, #fff);backdrop-filter:blur(10px);border-bottom:1px solid var(--c-line)}
header.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{font-family:'Instrument Serif',serif;font-style:italic;font-size:26px;color:var(--c-primary);text-decoration:none}
.nav-right{display:flex;align-items:center;gap:22px}
.nav-link{font-size:14px;text-decoration:none;color:var(--c-ink);opacity:.75;border-bottom:1px solid transparent;padding-bottom:2px}
.nav-link:hover{opacity:1;border-color:var(--c-gold)}
.langsel{position:relative}
.langsel summary{list-style:none;cursor:pointer;font-size:13px;font-weight:600;border:1px solid var(--c-line);padding:8px 14px;border-radius:999px;display:inline-flex;align-items:center;gap:6px;user-select:none}
.langsel summary::-webkit-details-marker{display:none}
.langsel[open] summary{border-color:var(--c-gold);color:var(--c-primary)}
.langsel-list{position:absolute;top:calc(100% + 8px);right:0;background:#fff;border:1px solid var(--c-line);border-radius:10px;padding:8px;display:grid;grid-template-columns:repeat(3,1fr);gap:2px;min-width:190px;box-shadow:0 14px 30px rgba(23,35,28,.14);z-index:30}
.langsel-list a{padding:7px 8px;font-size:12px;text-decoration:none;border-radius:6px;text-align:center;color:var(--c-ink)}
.langsel-list a:hover{background:var(--c-bg-alt)}
.langsel-list a.active{color:var(--c-gold);font-weight:700}

/* hero — full-bleed edge-to-edge video band */
.hero{position:relative;min-height:90vh;display:flex;align-items:flex-end;overflow:hidden;border-bottom:1px solid var(--c-line)}
.hero-media-full{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.hero-media-full video{width:100%;height:100%;object-fit:cover;display:block}
.hero-scrim{position:absolute;inset:0;background:linear-gradient(180deg, rgba(21,51,40,.12) 0%, rgba(21,51,40,.42) 45%, rgba(21,51,40,.92) 100%)}
.hero-overlay{position:relative;z-index:1;width:100%;padding:80px 24px 76px}
.hero-copy{max-width:760px}
.hero h1{font-size:clamp(44px,7.2vw,96px);max-width:16ch;color:#fff}
.hero .lede{margin-top:22px;font-size:19px;max-width:46ch;color:rgba(255,255,255,.9)}
.hero-cta{margin-top:32px;display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.btn{display:inline-block;background:var(--c-primary);color:#fff;font-weight:600;font-size:15px;padding:14px 26px;border-radius:2px;text-decoration:none;border:1px solid var(--c-primary)}
.btn:hover{background:var(--c-primary-dark)}
.hero .btn{background:var(--c-gold);border-color:var(--c-gold);color:var(--c-primary-dark)}
.hero .btn:hover{background:color-mix(in srgb, var(--c-gold) 84%, #000)}
.btn-ghost{font-size:14px;font-weight:600;text-decoration:none;color:var(--c-primary);border-bottom:1px solid var(--c-gold);padding-bottom:2px}
.btn-ghost:hover{color:var(--c-gold)}

section{padding:60px 0}

/* article */
.article{padding-top:52px}
.article-grid{display:grid;grid-template-columns:120px 1fr;gap:40px}
.rail{position:relative;padding-left:22px;border-left:2px solid var(--c-primary)}
.rail-num{display:block;font-family:'Instrument Serif',serif;font-size:34px;color:var(--c-primary)}
.rail-label{display:block;margin-top:8px;font-size:11px;text-transform:uppercase;letter-spacing:.14em;color:var(--c-gold);font-weight:700}
.article-main{min-width:0}
.prose h2{font-size:30px;margin:34px 0 14px;font-weight:400}
.prose h3{font-size:19px;margin:26px 0 8px;font-family:'Inter',sans-serif;font-weight:700;color:var(--c-ink)}
.prose p{margin:12px 0}
.prose ul{margin:12px 0 12px 22px}
.prose li{margin:6px 0}
.vid{aspect-ratio:16/9;width:100%;border-radius:4px;overflow:hidden;background:#000;margin:0 0 30px;border:1px solid var(--c-line)}
.vid video{width:100%;height:100%}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px;margin:24px 0}
.grid img{width:100%;border-radius:4px;display:block;border:1px solid var(--c-line)}

/* index / "more" section — ruled editorial index */
.index-section{background:var(--c-bg-alt);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.index-section h2{font-size:34px;margin-bottom:26px}
.index-list{border-top:1px solid var(--c-line)}
.index-row{display:grid;grid-template-columns:44px 140px 1fr 26px;align-items:center;gap:18px;padding:20px 4px;text-decoration:none;color:var(--c-ink);border-bottom:1px solid var(--c-line)}
.index-n{font-family:'Instrument Serif',serif;font-size:20px;color:var(--c-gold)}
.index-k{font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:var(--c-primary);font-weight:700}
.index-t{font-size:18px;font-family:'Instrument Serif',serif;color:var(--c-ink)}
.index-arrow{opacity:0;transition:opacity .15s,transform .15s;color:var(--c-gold);transform:translateX(-6px)}
.index-row:hover .index-arrow{opacity:1;transform:translateX(0)}
.index-row:hover .index-t{color:var(--c-primary)}

/* contact */
.contact-section h2{font-size:34px}
.lede-sm{margin:10px 0 26px;max-width:52ch;opacity:.8}
form.contact{display:grid;gap:18px;max-width:560px}
.f-row{display:flex;flex-direction:column;gap:7px}
form.contact label{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--c-primary)}
form.contact input,form.contact textarea,form.contact select{padding:13px 14px;border:1px solid var(--c-line);border-radius:2px;font:inherit;background:#fff;color:var(--c-ink);width:100%}
form.contact input:focus,form.contact textarea:focus,form.contact select:focus{outline:none;border-color:var(--c-gold)}
form.contact button{justify-self:start;cursor:pointer}

/* fix any form embedded in the html-authored .prose content */
.prose form{display:grid;gap:14px;max-width:560px;margin:20px 0;padding:22px;border:1px solid var(--c-line);border-radius:4px;background:#fff}
.prose form label{display:block;font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--c-primary);margin-bottom:6px}
.prose form input,.prose form textarea,.prose form select{width:100%;padding:12px 14px;border:1px solid var(--c-line);border-radius:2px;font:inherit;background:var(--c-bg)}
.prose form input:focus,.prose form textarea:focus,.prose form select:focus{outline:none;border-color:var(--c-gold)}
.prose form br{display:none}
.prose form button,.prose form input[type=submit]{justify-self:start;background:var(--c-primary);color:#fff;border:1px solid var(--c-primary);padding:12px 24px;border-radius:2px;font-weight:600;cursor:pointer;width:auto}

/* footer */
footer{padding:50px 0;border-top:1px solid var(--c-line);font-size:14px}
.footer-grid{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;align-items:flex-start}
.f-brand{font-family:'Instrument Serif',serif;font-style:italic;font-size:22px;color:var(--c-primary);display:block;margin-bottom:6px}
.footer-grid p{opacity:.75;max-width:38ch}
.f-note{opacity:.65;max-width:36ch;font-size:13px}

[dir=rtl]{direction:rtl}
[dir=rtl] .rail{border-left:none;border-right:2px solid var(--c-primary);padding-left:0;padding-right:22px}
[dir=rtl] .index-row{grid-template-columns:26px 1fr 140px 44px}
[dir=rtl] .langsel-list{right:auto;left:0}

/* mobile — prevent horizontal overflow, keep desktop untouched */
html,body{overflow-x:hidden;max-width:100%}
img,video{max-width:100%;height:auto}
.prose table{display:block;overflow-x:auto;max-width:100%}

@media (max-width:880px){
  .article-grid{grid-template-columns:1fr}
  .rail{border-left:none;border-top:2px solid var(--c-primary);padding-left:0;padding-top:14px;display:flex;gap:12px;align-items:center}
  .index-row{grid-template-columns:32px 100px 1fr 20px}
  .hero{min-height:74vh}
  .hero-overlay{padding:56px 20px 48px}
}

@media (max-width:480px){
  .wrap{padding:0 16px}
  header.nav .wrap{height:auto;min-height:60px;flex-wrap:wrap;padding:10px 16px;gap:10px}
  .brand{font-size:21px}
  .nav-right{gap:10px;flex-wrap:wrap}
  .nav-link{font-size:13px}
  .langsel summary{padding:6px 10px;font-size:12px}
  .langsel-list{right:0;min-width:170px}
  .hero{min-height:66vh}
  .hero h1{font-size:clamp(32px,10vw,44px)}
  .hero .lede{font-size:16px}
  .btn{padding:12px 20px;font-size:14px}
}

/* reused article imagery (enzymes.bio watermarked) */
.prose figure.post-img{margin:30px 0}
.prose figure.post-img img{width:100%;height:auto;display:block;border-radius:12px}
.prose figure.post-img figcaption{font-size:13px;opacity:.72;margin-top:7px;line-height:1.4}