/* ============================================================
   RRK Labs — COA Library (/coa/)
   Same design language as the policy pages: hero, quick-facts strip,
   then the certificates as cards. Extends homepage.css; reuses .crumb
   from shop.css.
   ============================================================ */

.coa-hero{position:relative;overflow:hidden;background:var(--surface);border:1px solid var(--border);
  border-radius:var(--r-lg);padding:clamp(1.6rem,4vw,3rem);margin-top:1.1rem}
.coa-hero::after{content:"";position:absolute;right:-70px;top:-90px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,var(--accent-bg),transparent 68%);pointer-events:none}
.coa-hero__in{position:relative;z-index:1;max-width:64ch}
.coa-hero .eyebrow{display:block;margin-bottom:.8rem}
.coa-hero h1{font-size:clamp(2rem,5.5vw,3.4rem);font-weight:700;letter-spacing:-.035em;line-height:1.02;color:var(--ink)}
.coa-hero .lead{margin-top:1rem}
.coa-verified{display:inline-flex;align-items:center;gap:.45rem;margin-top:1.3rem;font-family:var(--fm);
  font-size:.74rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-2);
  background:var(--bg);border:1px solid var(--border-2);border-radius:var(--pill);padding:.4rem .85rem}
.coa-verified i{color:var(--accent-ink);font-size:1rem}

.coa-facts{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(.7rem,1.6vw,1.1rem);
  margin-top:clamp(1.1rem,2.6vw,1.6rem)}
.coa-fact{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);
  padding:1.05rem 1.15rem;position:relative;overflow:hidden}
.coa-fact::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--accent)}
.coa-fact i{font-size:1.15rem;color:var(--accent-ink)}
.coa-fact b{display:block;margin-top:.5rem;font-family:var(--fs);font-size:clamp(1.05rem,2vw,1.32rem);
  font-weight:700;letter-spacing:-.02em;color:var(--ink);line-height:1.1}
.coa-fact span{display:block;margin-top:.3rem;font-size:.82rem;color:var(--ink-2);line-height:1.5}

/* ---------- certificate cards ---------- */
.coa-bar{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;
  margin-top:clamp(1.8rem,4vw,2.8rem);padding-bottom:.9rem;border-bottom:1px solid var(--border);
  margin-bottom:clamp(1.1rem,2.4vw,1.6rem)}
.coa-bar .count{font-family:var(--fm);font-size:.8rem;color:var(--ink-3)}
.coa-bar .count b{color:var(--ink-1);font-weight:500}
.coa-bar .note{font-family:var(--fm);font-size:.76rem;color:var(--ink-4);display:inline-flex;align-items:center;gap:.4rem}
.coa-bar .note i{color:var(--accent-ink);font-size:1rem}

.coa-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(.9rem,2vw,1.4rem)}
.coa-card{display:grid;grid-template-columns:auto 1fr;gap:clamp(.9rem,2vw,1.4rem);
  background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);
  padding:clamp(1.1rem,2.4vw,1.6rem);transition:border-color .25s,transform .25s var(--ease),box-shadow .25s var(--ease)}
.coa-card:hover{border-color:var(--border-2);transform:translateY(-3px);box-shadow:0 26px 46px -34px rgba(27,26,22,.4)}
.coa-card__ph{width:clamp(64px,8vw,86px);aspect-ratio:600/804;background:var(--bg);border:1px solid var(--border);
  border-radius:var(--r-sm);overflow:hidden;display:grid;place-items:center}
.coa-card__ph img{width:100%;height:100%;object-fit:cover}
.coa-card__ph .ph{font-family:var(--fm);font-size:.62rem;letter-spacing:.1em;color:var(--ink-4)}
.coa-card__name{font-family:var(--fs);font-weight:600;font-size:clamp(1.05rem,2vw,1.28rem);letter-spacing:-.02em;
  color:var(--ink);line-height:1.2}
.coa-card__date{margin-top:.3rem;font-family:var(--fm);font-size:.74rem;color:var(--ink-3);
  display:inline-flex;align-items:center;gap:.35rem}
.coa-card__date i{color:var(--accent-ink);font-size:.9rem}

.coa-res{display:flex;flex-wrap:wrap;gap:.4rem;margin-top:.85rem}
.coa-res div{background:var(--bg);border:1px solid var(--border);border-radius:var(--r-sm);padding:.4rem .6rem}
.coa-res .k{display:block;font-family:var(--fm);font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--ink-4)}
.coa-res .v{display:block;font-family:var(--fm);font-size:.84rem;color:var(--ink);margin-top:.1rem}
.coa-res div.pure .v{color:var(--ok,#3F7A4E)}

.coa-docs{display:flex;flex-wrap:wrap;gap:.45rem;margin-top:.95rem}
.coa-doc{display:inline-flex;align-items:center;gap:.4rem;font-family:var(--fs);font-size:.84rem;font-weight:500;
  color:var(--ink);background:var(--bg);border:1.5px solid var(--border-2);border-radius:var(--pill);
  padding:.45rem .85rem;cursor:pointer;transition:background .2s,color .2s,border-color .2s}
.coa-doc:hover{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.coa-doc i{font-size:1rem}
.coa-none{font-family:var(--fm);font-size:.76rem;color:var(--ink-4);margin-top:.95rem}

.coa-empty{text-align:center;padding:clamp(2.5rem,7vw,4.5rem) 1rem;border:1px dashed var(--border-2);
  border-radius:var(--r);background:var(--surface)}
.coa-empty i{font-size:2rem;color:var(--ink-4);display:block;margin-bottom:.8rem}
.coa-empty h2{font-size:1.3rem;margin-bottom:.5rem}
.coa-empty p{color:var(--ink-2);max-width:46ch;margin:0 auto}

.coa-foot{margin-top:clamp(1.6rem,3.5vw,2.4rem);padding:1.1rem 1.25rem;background:var(--surface);
  border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:var(--r-sm);
  display:flex;gap:.75rem;align-items:flex-start}
.coa-foot i{color:var(--accent-ink);font-size:1.2rem;flex:none;margin-top:.1rem}
.coa-foot p{font-size:.87rem;color:var(--ink-2);line-height:1.6;margin:0}
.coa-foot a{color:var(--accent-ink);text-decoration:underline;text-underline-offset:3px}

/* ---------- viewer ---------- */
.coa-modal{position:fixed;inset:0;z-index:300;background:rgba(20,19,15,.86);backdrop-filter:blur(3px);
  display:none;align-items:center;justify-content:center;padding:clamp(.8rem,3vw,2rem)}
.coa-modal.on{display:flex}
.coa-modal__in{background:var(--surface);border-radius:var(--r-lg);max-width:900px;width:100%;
  max-height:92vh;display:flex;flex-direction:column;overflow:hidden}
.coa-modal__h{display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.9rem 1.1rem;border-bottom:1px solid var(--border);flex:none}
.coa-modal__h b{font-family:var(--fs);font-weight:600;font-size:1rem;color:var(--ink)}
.coa-modal__h .acts{display:flex;gap:.5rem;align-items:center}
.coa-modal__b{padding:clamp(.8rem,2vw,1.4rem);overflow:auto;background:var(--surface-2)}
.coa-modal__b img{width:100%;height:auto;border-radius:var(--r-sm);background:#fff;display:block}
.coa-modal__b iframe{width:100%;height:70vh;border:0;border-radius:var(--r-sm);background:#fff;display:block}

main#main{padding-bottom:clamp(2.6rem,6vw,4rem)}

@media (max-width:1000px){
  .coa-facts{grid-template-columns:repeat(2,1fr)}
  .coa-grid{grid-template-columns:1fr}
}
@media (max-width:620px){
  .coa-facts{grid-template-columns:1fr}
  .coa-hero{padding:1.2rem 1.05rem}
  .coa-hero h1{font-size:1.75rem}
  .coa-card{padding:1rem .9rem;gap:.8rem}
  .coa-card__ph{width:58px}
  .coa-modal__b iframe{height:60vh}
}
@media (prefers-reduced-motion:reduce){
  .coa-card,.coa-doc{transition:none}
}