/* Бібліотека 3D-моделей (/3d-modeli) */
.m3-hero{padding-bottom:16px}
.m3-hero .w{grid-template-columns:minmax(0,1fr)}
.m3-filtry{display:flex;flex-wrap:wrap;gap:12px 20px;align-items:center;justify-content:space-between;margin-bottom:28px}
.m3-predmety{display:flex;flex-wrap:wrap;gap:8px}
.m3-predmety button{padding:7px 14px;border-radius:999px;border:1px solid var(--ramka,#ddd);background:#fff;font:600 14px system-ui;color:var(--synii,#22306b);cursor:pointer}
.m3-predmety button span{opacity:.55;font-weight:500}
.m3-predmety button.aktyvna{background:var(--synii,#22306b);border-color:var(--synii,#22306b);color:#fff}
.m3-poshuk input{width:min(320px,100%);padding:9px 14px;border-radius:999px;border:1px solid var(--ramka,#ddd);font:15px system-ui;background:#fff}
.m3-teka{margin:0 0 44px}
.m3-teka-holova{display:flex;gap:14px;align-items:flex-start;margin-bottom:18px}
.m3-teka-ik{font-size:30px;line-height:1}
.m3-teka-holova h3{margin:0 0 4px;font:800 clamp(22px,2.6vw,28px)/1.15 var(--serif,Georgia,serif);color:var(--synii,#22306b)}
.m3-teka-holova p{margin:0}
.m3-teka-opys{margin-top:6px!important;max-width:760px;color:#4a4458;line-height:1.55}
.m3-sitka{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px}
.m3-kartka{display:flex;flex-direction:column;border-radius:18px;background:#fff;border:1px solid var(--ramka,#e6e0d4);overflow:hidden;transition:transform .2s,box-shadow .2s}
.m3-kartka:hover{transform:translateY(-3px);box-shadow:0 16px 30px -18px rgba(29,22,64,.35)}
.m3-vidkryty{position:relative;display:block;width:100%;padding:0;border:0;cursor:pointer;background:radial-gradient(circle at 50% 40%,#fff,#eef0f7 70%)}
.m3-vidkryty model-viewer{width:100%;height:210px;pointer-events:none;--poster-color:transparent}
.m3-pidkazka{position:absolute;right:10px;bottom:10px;padding:3px 10px;border-radius:999px;background:rgba(29,22,64,.75);color:#fff;font:600 12px system-ui;opacity:0;transition:opacity .2s}
.m3-kartka:hover .m3-pidkazka,.m3-vidkryty:focus-visible .m3-pidkazka{opacity:1}
.m3-tekst{display:flex;flex-direction:column;gap:6px;padding:14px 16px 18px;flex:1}
.m3-tekst b{font:700 17px/1.25 var(--serif,Georgia,serif);color:var(--synii,#22306b)}
.m3-mitka{font:600 12px system-ui;letter-spacing:.06em;text-transform:uppercase;color:#b5482a}
.m3-opys{font-size:14px;line-height:1.5;color:#4a4458}
.m3-stl{margin-top:auto;padding-top:6px;font:600 13.5px system-ui;color:var(--synii,#22306b)}
.m3-nichoho,.m3-porozhno{padding:30px;text-align:center;color:#6b6578}
.m3-dodaty{display:flex;flex-direction:column;gap:6px;margin-top:12px;padding:20px 22px;border-radius:16px;background:#fbf6ea;border:1px dashed #d8c9a3;font-size:15px}
.m3-dodaty code{background:#fff;padding:1px 5px;border-radius:4px}
.m3-vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
/* вікно перегляду */
.m3-vikno{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:2vh 2vw;background:rgba(20,16,40,.6);backdrop-filter:blur(3px)}
.m3-vikno[hidden]{display:none}
.m3-vikno-tilo{position:relative;display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);width:min(1100px,96vw);max-height:92vh;overflow:hidden;border-radius:20px;background:#fff;box-shadow:0 30px 80px rgba(0,0,0,.35)}
.m3-bez-prokrutky{overflow:hidden}
.m3-vikno model-viewer{width:100%;height:min(70vh,620px);background:radial-gradient(circle at 50% 40%,#fff,#e9ecf5 75%)}
.m3-vikno-info{padding:28px 26px;display:flex;flex-direction:column;gap:8px;overflow:auto}
.m3-vikno-info h3{margin:0;font:800 26px/1.15 var(--serif,Georgia,serif);color:var(--synii,#22306b)}
.m3-vikno-info p{margin:0}
.m3-dii{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px!important}
.m3-zavantazhyty{display:inline-block;padding:8px 16px;border-radius:999px;border:1px solid var(--synii,#22306b);color:var(--synii,#22306b);text-decoration:none;font-weight:600;font-size:14px}
.m3-z-stl{background:var(--synii,#22306b);color:#fff}
.m3-yak{margin-top:auto!important;font-size:13px;color:#7a7488;line-height:1.5}
.m3-ar{position:absolute;left:14px;bottom:14px;padding:9px 16px;border:0;border-radius:999px;background:#b5482a;color:#fff;font:600 14px system-ui}
.m3-zakryty{position:absolute;top:10px;right:12px;width:38px;height:38px;border:0;border-radius:50%;background:rgba(29,22,64,.08);font-size:18px;cursor:pointer}
@media (max-width:760px){
  .m3-vikno-tilo{grid-template-columns:1fr}
  .m3-vikno model-viewer{height:52vh}
  .m3-vikno-info{padding:18px 18px 22px}
  .m3-yak{display:none}
  .m3-sitka{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
  .m3-vidkryty model-viewer{height:150px}
}
.sv-rozdil.m3{padding-top:8px}
.m3-zavantazhyty[hidden]{display:none}

/* список 3D-проєктів */
.m3-proiekty{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.m3-proiekt{display:flex;flex-direction:column;height:100%;border-radius:20px;background:#fff;border:1px solid var(--ramka,#e6e0d4);overflow:hidden;color:inherit;text-decoration:none;transition:transform .2s,box-shadow .2s}
.m3-proiekt:hover{transform:translateY(-3px);box-shadow:0 18px 34px -18px rgba(29,22,64,.35)}
.m3-proiekt model-viewer{width:100%;height:220px;pointer-events:none;background:radial-gradient(circle at 50% 40%,#fff,#eef0f7 70%)}
.m3-proiekt-tekst{display:flex;flex-direction:column;gap:8px;padding:18px 20px 22px;flex:1}
.m3-proiekt-tekst b{font:800 21px/1.2 var(--serif,Georgia,serif);color:var(--synii,#22306b)}
.m3-proiekt-tekst em{margin-top:auto;font-style:normal;font-weight:600;font-size:14px;color:var(--synii,#22306b)}