/* Reta Dynamic — design system derived from the packaging
   Mineral ice-blue stock · navy plate · silver foil · embossed botanical */
:root{
  --ice:#e3ebf3; --ice-2:#eef3f8; --ice-3:#f7f9fc; --paper:#fbfcfe;
  --navy:#0d2a5a; --navy-2:#16397a; --navy-3:#24509a;
  --ink:#131f36; --muted:#56657d; --line:#cfd9e6; --silver:#aeb9c8; --silver-2:#dfe6ee;
  --ok:#1f7a4d; --warn:#9a6b00;
  --serif:"Cormorant Garamond","Cormorant",Georgia,"Times New Roman",serif;
  --sans:"Instrument Sans","Helvetica Neue",Arial,sans-serif;
  --max:1180px; --gutter:clamp(18px,4vw,48px);
  --r:6px; --shadow:0 18px 50px -24px rgba(13,42,90,.35);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.6;color:var(--ink);background:var(--paper)}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy-2)}
h1,h2,h3,h4{font-family:var(--serif);font-weight:500;line-height:1.1;margin:0 0 .5em;color:var(--navy);letter-spacing:.005em}
h1{font-size:clamp(2.4rem,5.2vw,4.4rem)}
h2{font-size:clamp(1.9rem,3.6vw,2.9rem)}
h3{font-size:clamp(1.3rem,2vw,1.6rem)}
p{margin:0 0 1em}
.eyebrow{font-family:var(--sans);font-size:.72rem;letter-spacing:.22em;text-transform:uppercase;color:var(--navy-3);font-weight:600;margin-bottom:1rem;display:block}
.lede{font-size:1.125rem;color:var(--muted);max-width:62ch}
.wrap{max-width:var(--max);margin:0 auto;padding-inline:var(--gutter)}
.skip{position:absolute;left:-999px;top:0;background:var(--navy);color:#fff;padding:.6rem 1rem;z-index:100}
.skip:focus{left:8px;top:8px}
:focus-visible{outline:2px solid var(--navy-3);outline-offset:3px}

/* Draft ribbon (set RD_CONFIG.draft=false to remove) */
.draft-bar{background:#3b2f00;color:#ffe08a;font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;text-align:center;padding:.45rem var(--gutter)}
.draft-bar b{color:#fff}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(251,252,254,.92);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:68px}
.brand{font-family:var(--serif);font-size:1.35rem;letter-spacing:.18em;color:var(--navy);text-decoration:none;font-weight:500;white-space:nowrap}
.brand small{display:block;font-family:var(--sans);font-size:.58rem;letter-spacing:.3em;color:var(--muted);font-weight:600;margin-top:-2px}
.nav{display:flex;gap:clamp(.8rem,2vw,1.6rem);align-items:center}
.nav a{font-size:.86rem;letter-spacing:.04em;color:var(--ink);text-decoration:none;padding:.4rem 0;border-bottom:1px solid transparent}
.nav a:hover,.nav a[aria-current]{border-bottom-color:var(--navy)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:var(--r);padding:.45rem .7rem;font:inherit;color:var(--navy)}
@media(max-width:860px){
  .nav-toggle{display:inline-block}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:.6rem var(--gutter) 1rem;gap:.2rem}
  .nav.open{display:flex}
  .nav a{padding:.7rem 0;border-bottom:1px solid var(--line)}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1.4rem;border-radius:var(--r);font-weight:600;font-size:.9rem;letter-spacing:.04em;text-decoration:none;border:1px solid var(--navy);transition:background .18s,color .18s,transform .18s;cursor:pointer;font-family:var(--sans)}
.btn-primary{background:var(--navy);color:#fff}
.btn-primary:hover{background:var(--navy-2)}
.btn-ghost{background:transparent;color:var(--navy)}
.btn-ghost:hover{background:var(--ice-2)}
.btn-sm{padding:.55rem 1rem;font-size:.82rem}
.btn:active{transform:translateY(1px)}

/* Sections */
section{padding-block:clamp(3.5rem,8vw,7rem)}
.section-head{max-width:70ch;margin-bottom:clamp(2rem,4vw,3.5rem)}
.bg-ice{background:linear-gradient(180deg,var(--ice-2),var(--ice))}
.bg-navy{background:var(--navy);color:#dfe8f4}
.bg-navy h2,.bg-navy h3,.bg-navy .eyebrow{color:#fff}
.bg-navy .lede{color:#c2d0e4}
.bg-navy a{color:#fff}
.rule{border:0;border-top:1px solid var(--line);margin:0}

/* Hero */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(900px 500px at 85% 20%,#fff 0%,rgba(255,255,255,0) 60%),
  linear-gradient(160deg,var(--ice-3) 0%,var(--ice) 60%,#d6e1ee 100%)}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:clamp(2rem,5vw,5rem);align-items:center}
.hero h1{margin-bottom:1rem}
.hero h1 em{font-style:italic;color:var(--navy-3)}
.hero .cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:1.8rem}
.hero-media{position:relative}
.hero-media img{border-radius:8px;box-shadow:var(--shadow)}
.hero-chip{position:absolute;bottom:-14px;left:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:.6rem .9rem;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--navy);box-shadow:0 8px 24px -14px rgba(13,42,90,.5)}
.hero-chip b{display:block;font-size:.95rem;letter-spacing:.02em;text-transform:none;font-family:var(--serif);font-weight:600}
@media(max-width:860px){.hero .wrap{grid-template-columns:1fr}.hero-media{order:-1}}

/* RUO band */
.ruo{background:var(--navy);color:#fff;font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;text-align:center;padding:.6rem var(--gutter)}

/* Trust strip */
.trust{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.trust>div{background:var(--paper);padding:1.4rem 1.2rem}
.trust h3{font-size:1.15rem;margin-bottom:.3rem}
.trust p{font-size:.9rem;color:var(--muted);margin:0}
.trust .icon{width:34px;height:34px;color:var(--navy-3);margin-bottom:.8rem}
@media(max-width:860px){.trust{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.trust{grid-template-columns:1fr}}

/* Kit */
.kit{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(2rem,5vw,5rem);align-items:center}
.kit-list{list-style:none;padding:0;margin:0;display:grid;gap:1rem}
.kit-list li{display:grid;grid-template-columns:64px 1fr;gap:1rem;align-items:start;padding:1rem 0;border-top:1px solid var(--line)}
.kit-list li:last-child{border-bottom:1px solid var(--line)}
.kit-list .qty{font-family:var(--serif);font-size:2rem;color:var(--navy);line-height:1}
.kit-list h3{font-size:1.05rem;font-family:var(--sans);letter-spacing:.08em;text-transform:uppercase;font-weight:600;margin-bottom:.2rem}
.kit-list p{margin:0;color:var(--muted);font-size:.95rem}
@media(max-width:860px){.kit{grid-template-columns:1fr}}

/* Spec */
.spec{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:clamp(2rem,5vw,4rem)}
.spec-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:clamp(1.4rem,3vw,2.2rem);box-shadow:var(--shadow)}
.spec-card .plate{display:inline-block;background:var(--navy);color:#fff;font-family:var(--serif);font-size:1.6rem;padding:.2rem 1rem;border:2px solid var(--silver);border-radius:4px;letter-spacing:.06em}
.spec-table{width:100%;border-collapse:collapse;margin-top:1.2rem;font-size:.92rem}
.spec-table th,.spec-table td{text-align:left;padding:.7rem 0;border-top:1px solid var(--line);vertical-align:top}
.spec-table th{font-weight:600;letter-spacing:.1em;text-transform:uppercase;font-size:.7rem;color:var(--muted);width:40%}
.price{font-family:var(--serif);font-size:2.6rem;color:var(--navy);line-height:1}
.price small{font-family:var(--sans);font-size:.75rem;color:var(--muted);letter-spacing:.1em;text-transform:uppercase;display:block;margin-top:.3rem}
.checks{list-style:none;padding:0;margin:1rem 0 0;display:grid;grid-template-columns:1fr 1fr;gap:.5rem;font-size:.9rem}
.checks li::before{content:"✓";color:var(--ok);font-weight:700;margin-right:.5rem}
@media(max-width:860px){.spec{grid-template-columns:1fr}}

/* Placeholder marker (removed when RD_CONFIG.draft=false and value supplied) */
.ph{background:#fff4d6;border-bottom:2px dotted #c98f00;padding:0 .2em;border-radius:2px}
.ph::after{content:" [placeholder]";font-size:.68em;color:#8a5f00;letter-spacing:.05em}
.draft-off .ph{background:none;border:0}.draft-off .ph::after{content:""}

/* Verify */
.verify-box{background:#fff;border:1px solid var(--line);border-radius:10px;padding:clamp(1.4rem,3vw,2.4rem);max-width:640px}
.field{display:grid;gap:.4rem;margin-bottom:1rem}
.field label{font-size:.75rem;letter-spacing:.14em;text-transform:uppercase;font-weight:600;color:var(--muted)}
.field input,.field select,.field textarea{font:inherit;padding:.8rem .9rem;border:1px solid var(--silver);border-radius:var(--r);background:#fff;color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--navy-3);outline:2px solid rgba(36,80,154,.25)}
.field .hint{font-size:.8rem;color:var(--muted)}
.field .err{font-size:.8rem;color:#a12626;display:none}
.field.invalid .err{display:block}.field.invalid input{border-color:#a12626}
.result{margin-top:1rem;padding:1rem;border-radius:var(--r);border:1px solid var(--line);background:var(--ice-3);display:none}
.result.show{display:block}
.result.ok{border-color:#bfe3cf;background:#eefaf3}
.result.bad{border-color:#f0c9c9;background:#fdf1f1}

/* Tables */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:#fff}
table.data{width:100%;border-collapse:collapse;font-size:.9rem;min-width:640px}
table.data th{font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);text-align:left;padding:.9rem 1rem;background:var(--ice-3);border-bottom:1px solid var(--line)}
table.data td{padding:.9rem 1rem;border-bottom:1px solid var(--line)}
table.data tr:last-child td{border-bottom:0}

/* Cards */
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.2rem}
.cards-4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media(max-width:960px){.cards-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:560px){.cards-4{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:1.6rem}
.card .num{font-family:var(--serif);font-size:1.4rem;color:var(--silver);margin-bottom:.6rem}
.card h3{font-size:1.2rem}
.card p{color:var(--muted);font-size:.95rem;margin:0}
.card .why{margin-top:.8rem;font-size:.85rem;color:var(--navy-2)}
@media(max-width:860px){.cards{grid-template-columns:1fr}}

/* Receptor figure */
.figure{margin:2.5rem 0 0;background:#fff;border:1px solid var(--line);border-radius:10px;padding:1.5rem}
.figure svg{width:100%;height:auto}
.figure figcaption{font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-top:.8rem}

/* Split */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(2rem,5vw,5rem);align-items:center}
@media(max-width:860px){.split{grid-template-columns:1fr}}
.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;margin-top:2rem}
.stat{border-top:2px solid var(--silver);padding-top:.8rem}
.stat b{font-family:var(--serif);font-size:2.2rem;font-weight:500;color:var(--navy);display:block;line-height:1}
.stat span{font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
@media(max-width:700px){.stat-grid{grid-template-columns:1fr 1fr}}

/* FAQ */
.faq{max-width:820px}
.faq details{border-top:1px solid var(--line)}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:1rem;padding:1.1rem 0;font-family:var(--serif);font-size:1.25rem;color:var(--navy)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--sans);color:var(--silver);font-size:1.4rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq .a{padding:0 0 1.2rem;color:var(--muted);max-width:68ch}

/* Article pages */
.article{max-width:760px}
.article h2{margin-top:2.6rem;font-size:clamp(1.6rem,3vw,2.2rem)}
.article h3{margin-top:1.8rem}
.article ul,.article ol{padding-left:1.2rem;color:var(--ink)}
.article li{margin-bottom:.4rem}
.article .callout{border-left:3px solid var(--navy-3);background:var(--ice-3);padding:1rem 1.2rem;margin:1.6rem 0;font-size:.95rem}
.article .answer{background:#fff;border:1px solid var(--line);border-radius:8px;padding:1.2rem 1.4rem;margin:1rem 0 1.6rem}
.article .answer p:last-child{margin:0}
.toc{background:#fff;border:1px solid var(--line);border-radius:8px;padding:1rem 1.2rem;font-size:.9rem;margin:1.5rem 0 2.5rem}
.toc ol{margin:.4rem 0 0;padding-left:1.2rem}
.toc a{text-decoration:none}
.sources{font-size:.85rem;color:var(--muted)}
.sources li{margin-bottom:.4rem}
.meta{font-size:.8rem;color:var(--muted);letter-spacing:.06em;text-transform:uppercase}
.page-head{padding-block:clamp(2.5rem,6vw,5rem) clamp(1.5rem,4vw,3rem)}
.breadcrumb{font-size:.8rem;color:var(--muted);margin-bottom:1rem}
.breadcrumb a{color:var(--muted);text-decoration:none}
.breadcrumb a:hover{color:var(--navy)}

/* Forms */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 1.2rem}
.form-grid .full{grid-column:1/-1}
@media(max-width:640px){.form-grid{grid-template-columns:1fr}}
.check{display:flex;gap:.6rem;align-items:flex-start;font-size:.9rem;margin-bottom:.8rem}
.check input{margin-top:.25rem;flex:none}

/* Footer */
.site-footer{background:var(--ink);color:#b9c4d6;padding-block:3rem 2rem;font-size:.88rem}
.site-footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2rem}
.site-footer h4{color:#fff;font-family:var(--sans);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;margin-bottom:.8rem}
.site-footer a{color:#dbe3ef;text-decoration:none}
.site-footer a:hover{text-decoration:underline}
.site-footer ul{list-style:none;padding:0;margin:0;display:grid;gap:.4rem}
.site-footer .legal{margin-top:2.5rem;padding-top:1.4rem;border-top:1px solid rgba(255,255,255,.12);font-size:.78rem;color:#8e9bb1}
.site-footer .legal strong{color:#fff}
@media(max-width:860px){.site-footer .cols{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.site-footer .cols{grid-template-columns:1fr}}

/* Gate */
.gate{position:fixed;inset:0;background:rgba(13,31,54,.86);z-index:200;display:none;align-items:center;justify-content:center;padding:var(--gutter)}
.gate.show{display:flex}
.gate-card{background:#fff;border-radius:12px;max-width:560px;width:100%;padding:clamp(1.4rem,4vw,2.4rem);max-height:90vh;overflow:auto}
.gate-card h2{font-size:1.8rem}
.gate-card p{font-size:.92rem;color:var(--muted)}
.gate-card .actions{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.2rem}
.hidden{display:none!important}

/* Nav CTA: never wrap; drop it on narrow desktops (it lives in the menu below 860px) */
.nav .btn{white-space:nowrap}
@media(max-width:1040px) and (min-width:861px){.nav .btn{display:none}}