.nya{--blue:#14532d;--green:#02541a;--red:#9b0033;--ink:#141b2d;--muted:#55607a;--line:#dbe3f0;--bg:#f4f8ff;--card:#fff;
font-family:Manrope,"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;color:var(--ink);line-height:1.5;max-width:1180px;margin:0 auto;padding:0 12px 40px;box-sizing:border-box;background:linear-gradient(180deg,#eaf3ff 0,#f6faff 320px)}
.nya *{box-sizing:border-box}
.nya h1,.nya h2,.nya h3{line-height:1.2;margin:0 0 .5em;color:var(--ink)}
.nya a{color:var(--blue)}
.nya button{font-family:inherit}

/* shell */
.nya-shell{display:block}
.nya-side{display:none}
.nya-mainwrap{min-width:0}
.nya-top{display:flex;align-items:center;gap:10px;padding:12px 0;border-bottom:1px solid var(--line);margin-bottom:12px}
.nya-logo{width:42px;height:42px;border-radius:12px;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px;flex:none}
.nya-logo.img{object-fit:contain;background:#fff;border:1px solid var(--line);padding:3px}
.nya-herologo{display:block;max-height:64px;max-width:220px;margin:0 0 12px;background:#fff;border-radius:12px;padding:6px}
.nya-brand{flex:1;min-width:0}.nya-brand b{display:block;font-size:18px}.nya-brand span{font-size:12.5px;color:var(--muted)}
.nya-pill{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-weight:700;font-size:14px;cursor:pointer;color:var(--blue)}
.nya-out{font-size:13px;margin-left:4px}
.nya-head{margin-bottom:12px}
.nya-crumb{font-size:13px;color:var(--muted);margin-bottom:4px}.nya-crumb a{text-decoration:none;color:var(--muted)}.nya-crumb #nya-crumb{color:var(--red);font-weight:700}
.nya-head h1{font-size:30px;margin:0}
.nya-head p{margin:2px 0 12px;color:var(--muted)}
.nya-pickers{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.nya-pickers label{font-size:12px;font-weight:800;letter-spacing:.04em;display:block;margin-bottom:4px}
.nya-pickers .c1 label{color:var(--blue)}.nya-pickers .c2 label{color:var(--red)}
.nya-pickers .c1 select{border-color:#a9c8f2;background:#eef5ff}.nya-pickers .c2 select{border-color:#f0b5c6;background:#fdeff3}
.nya-mnav{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin:6px 0 16px}
.nya-mnavb{border:0;background:transparent;padding:10px 4px;border-radius:12px;font-size:12.5px;font-weight:700;color:#2b3550;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:4px;text-align:center}
.nya-mnavb i{font-style:normal;font-size:20px;line-height:1}
.nya-mnavb.on{background:var(--blue);color:#fff}
.nya-foot{text-align:center;font-size:12.5px;color:var(--muted);margin:24px 0 0}

@media (min-width:900px){
.nya-shell{display:grid;grid-template-columns:230px 1fr;gap:22px;align-items:start}
.nya-side{display:block;position:sticky;top:12px;background:rgba(255,255,255,.85);border:1px solid var(--line);border-radius:16px;padding:14px 10px}
.nya-sbrand{display:flex;gap:10px;align-items:center;padding:4px 8px 12px}.nya-sbrand b{display:block}.nya-sbrand small{color:var(--muted);font-size:12px}
.nya-slabel{font-size:11px;font-weight:800;letter-spacing:.06em;color:var(--muted);padding:12px 10px 4px}
.nya-sitem{display:flex;gap:10px;align-items:center;width:100%;border:0;background:transparent;padding:10px 12px;border-radius:10px;font-size:14px;font-weight:700;color:#2b3550;cursor:pointer;text-align:left}
.nya-sitem i{font-style:normal;width:22px;text-align:center}
.nya-sitem:hover{background:#eef5ff}.nya-sitem.on{background:#e3eeff;color:var(--blue);box-shadow:inset 3px 0 0 var(--blue)}
.nya-mnav{display:none}
.nya-top .nya-logo,.nya-top .nya-brand b,.nya-top .nya-brand span{display:none}
.nya-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px}
.nya-pickers{min-width:340px}
}
@media (max-width:420px){.nya-row{grid-template-columns:1fr}}

/* form controls */
.nya select,.nya input[type=text],.nya input[type=email],.nya input[type=password],.nya input[type=number],.nya input[type=tel],.nya input[type=date],.nya input[type=time],.nya textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:#f7fbff;font:inherit;color:var(--ink);min-height:46px}
.nya textarea{min-height:96px;resize:vertical}
.nya select:focus,.nya input:focus,.nya textarea:focus,.nya button:focus-visible,.nya-ed:focus{outline:3px solid #9cc4f7;outline-offset:1px}
.nya-sec{padding:14px 0;border-bottom:1px solid #edf1f8}
.nya-sec:last-of-type{border-bottom:0}
.nya-lab,.nya-body label.l{display:block;font-weight:800;font-size:12.5px;letter-spacing:.03em;color:#1c2f52;margin:0 0 8px;text-transform:uppercase}
.nya-body label.l{margin-top:14px;text-transform:none;font-size:13px}
.nya-lab .req{color:var(--red)}
.nya-body h3{margin-top:24px}
.nya-hint{font-size:13px;color:var(--muted);margin:6px 0 0}.nya-hint.center{text-align:center}
.nya-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.nya-row .nya-sec{border:0;padding:6px 0}
.nya-chips{display:flex;flex-wrap:wrap;gap:8px}
.nya-chip{border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 16px;font-weight:700;font-size:14px;cursor:pointer;color:var(--ink);min-height:40px}
.nya-chip.on{background:var(--blue);border-color:var(--blue);color:#fff}
.nya-chip.res{display:inline-flex;align-items:center;gap:6px;background:#f7fbff;color:var(--ink);cursor:default;padding:7px 8px 7px 14px}
.nya-x{border:0;background:transparent;font-size:18px;line-height:1;cursor:pointer;color:var(--muted);padding:2px 6px}
.nya-addrow{display:flex;gap:8px;margin-top:10px}.nya-addrow input{flex:1}.nya-addrow .nya-btn{padding:10px 16px}
.nya-dok{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.nya-dokc{border:1px solid var(--line);border-radius:12px;padding:10px;background:#fff}.nya-dokc small{display:block;font-size:11.5px;font-weight:700;color:#2b3550;margin-bottom:6px;min-height:30px}
.nya-checks{display:grid;gap:6px;max-height:230px;overflow:auto;border:1px solid var(--line);border-radius:12px;padding:10px;background:#f7fbff;margin-bottom:8px}
.nya-checks label{display:flex;gap:8px;align-items:flex-start;font-size:14px;font-weight:500}
.nya-checks input{margin-top:4px;flex:none}
.nya-modes{display:flex;gap:6px;flex-wrap:wrap}
.nya-modes button{flex:1;min-width:140px;border:2px solid var(--line);background:#fff;border-radius:12px;padding:11px 10px;font-weight:800;cursor:pointer;color:var(--ink)}
.nya-modes button.on{border-color:var(--blue);background:#eef5ff;color:var(--blue)}

/* cards */
.nya-card{background:var(--card);border-radius:16px;box-shadow:0 6px 24px rgba(20,40,90,.08);overflow:hidden;margin-bottom:16px}
.nya-card>h2{background:var(--blue);color:#fff;margin:0;padding:16px 20px;font-size:21px;display:flex;justify-content:space-between;align-items:center;gap:10px}
.nya-card.green>h2{background:var(--green)}.nya-card.red>h2{background:var(--red)}
.nya-badge{background:#fff;color:var(--blue);font-size:12px;font-weight:800;padding:4px 12px;border-radius:999px}
.nya-body{padding:14px 20px 20px}
.nya-btn,.nya-btn2{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;padding:13px 20px;font-weight:800;cursor:pointer;text-decoration:none;min-height:48px;background:var(--blue);color:#fff}
.nya-btn.green{background:var(--green)}.nya-btn.red{background:var(--red)}
.nya-btn2{background:#fff;color:var(--ink);border:1px solid var(--line)}
.nya-btn[disabled]{opacity:.6;cursor:wait}
.nya-btn.full{width:100%;margin-top:14px}
.nya-msg{margin:12px 0 0;padding:10px 14px;border-radius:12px;font-size:14px;font-weight:600}
.nya-msg.err{background:#fdeaee;color:#8a0f2d}.nya-msg.ok{background:#e7f6ec;color:#0c5a24}
.nya-link{background:none;border:0;color:var(--blue);font-weight:700;cursor:pointer;padding:6px}
.nya-link.del{color:var(--red)}
.nya-bar{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 12px}
.nya-bar .nya-btn,.nya-bar .nya-btn2{padding:10px 14px;min-height:42px;font-size:14px}

/* home and levels */
.nya-hero{position:relative;border-radius:18px;overflow:hidden;background:linear-gradient(160deg,#0b3b82 0%,#0b66d6 55%,#02541a 130%);color:#fff;padding:34px 22px;margin-bottom:16px}
.nya-hero.small{padding:24px 22px}
.nya-hero h1{color:#fff;font-size:36px;margin:6px 0 8px;letter-spacing:.01em}.nya-hero p{margin:0 0 4px;font-size:16px;opacity:.95}
.nya-kicker{font-size:12px;font-weight:800;letter-spacing:.08em;opacity:.9}
.nya-hero .free{display:inline-block;margin-top:14px;background:#fff;color:var(--green);font-weight:800;padding:6px 14px;border-radius:999px;font-size:14px}
.nya-hero .nya-bar{margin-top:14px}
.nya-h2{font-size:22px;margin:18px 0 10px}
.nya-levels{display:grid;gap:10px}
.nya-level{display:flex;align-items:center;gap:14px;width:100%;text-align:left;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;cursor:pointer;box-shadow:0 2px 10px rgba(20,40,90,.05)}
.nya-level i{font-style:normal;font-size:26px}
.nya-ltxt{flex:1}.nya-ltxt b{display:block;font-size:20px;color:var(--blue)}.nya-ltxt small{color:var(--muted);font-size:14px}
.nya-level:nth-child(2) .nya-ltxt b{color:var(--green)}.nya-level:nth-child(3) .nya-ltxt b{color:var(--red)}
.nya-go{font-weight:800;color:var(--blue)}
.nya-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:14px}
.nya-fcard{background:#fff;border-radius:16px;border-top:4px solid var(--blue);padding:18px;box-shadow:0 4px 16px rgba(20,40,90,.07)}
.nya-fcard.green{border-color:var(--green)}.nya-fcard.red{border-color:var(--red)}
.nya-fcard small{font-weight:800;letter-spacing:.05em;color:var(--blue);font-size:11.5px}.nya-fcard.green small{color:var(--green)}.nya-fcard.red small{color:var(--red)}
.nya-fcard h3{font-size:20px;margin:4px 0 6px}.nya-fcard p{margin:0 0 8px;color:var(--muted);font-size:14px}
.nya-fcard .nya-costline{font-weight:800;color:var(--ink)}
.nya-fcard .nya-btn{width:100%;margin-top:6px}
.nya-costs{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;margin:14px 0}
.nya-cost{border-radius:14px;padding:12px 14px;background:#eef5ff;border-top:4px solid var(--blue)}
.nya-cost.green{background:#eff6f1;border-color:var(--green)}.nya-cost.red{background:#fdf1f4;border-color:var(--red)}
.nya-cost b{display:block;font-size:26px}.nya-cost span{font-size:13px;color:var(--muted)}

/* documents and tables */
.nya-ed{border:1px solid var(--line);border-radius:12px;padding:16px;background:#fff;overflow-x:auto;min-height:200px}
.nya-ed h2{font-size:20px;color:var(--blue)}.nya-ed h3{font-size:16px;color:var(--blue)}
.nya-ed table,.nya-table{border-collapse:collapse;width:100%;margin:10px 0;font-size:14px}
.nya-ed th,.nya-ed td,.nya-table th,.nya-table td{border:1px solid #9aa7bf;padding:6px 8px;vertical-align:top;text-align:left}
.nya-ed th,.nya-table th{background:#e8f0fb}
.nya-scroll{overflow-x:auto;margin:12px 0}
.nya-list{list-style:none;margin:0;padding:0}
.nya-list li{display:flex;gap:10px;align-items:center;justify-content:space-between;padding:12px 0;border-bottom:1px solid var(--line)}
.nya-list li:last-child{border:0}.nya-list small{color:var(--muted);display:block}
.nya-packs{display:grid;grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:8px}
.nya-packs button{border:2px solid var(--line);background:#fff;border-radius:14px;padding:12px 6px;cursor:pointer;font-weight:800}
.nya-packs button small{display:block;font-weight:600;color:var(--muted)}
.nya-packs button.on{border-color:var(--blue);background:#eef5ff}
.nya-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;margin:14px 0}
.nya-stat{border-radius:14px;padding:12px 14px;background:#eef5ff;border-top:4px solid var(--blue)}
.nya-stat.g{background:#eef6f0;border-color:var(--green)}
.nya-stat small{display:block;font-size:11px;font-weight:800;letter-spacing:.05em;color:var(--muted)}
.nya-stat b{font-size:22px}
.nya-box{background:#eef5ff;border-radius:14px;padding:14px 16px;margin:12px 0;font-size:14px}
.nya-code{font-family:ui-monospace,Menlo,Consolas,monospace;font-weight:800;background:#fff;border:1px dashed var(--blue);border-radius:8px;padding:2px 8px;user-select:all}
.nya-ttlist{display:grid;gap:8px}
.nya-ttrow{display:flex;align-items:center;justify-content:space-between;gap:12px;font-weight:600;font-size:14px;border:1px solid var(--line);border-radius:12px;padding:6px 6px 6px 14px;background:#f7fbff}
.nya-ttrow input{width:84px;flex:none;min-height:40px;padding:8px 10px}
.nya-pricing h2{font-size:28px}.nya-price-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:16px 0}
.nya-price{border-radius:14px;padding:16px;background:#eef5ff;border-top:4px solid var(--blue)}
.nya-price.nya-green{background:#eff6f1;border-color:var(--green)}.nya-price.nya-red{background:#fdf1f4;border-color:var(--red)}
.nya-amt{font-size:34px;font-weight:800}.nya-amt small{font-size:14px;font-weight:600;color:var(--muted)}
.nya-hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}
.nya-spin{display:inline-block;width:16px;height:16px;border:3px solid rgba(255,255,255,.5);border-top-color:#fff;border-radius:50%;animation:tlpspin .8s linear infinite}
@keyframes tlpspin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.nya-spin{animation:none}}
@media print{body *{visibility:hidden}.nya-ed,.nya-ed *{visibility:visible}.nya-ed{position:absolute;left:0;top:0;width:100%;border:0}}

/* ---------- study buddy chat ---------- */
.nya-mnav2{grid-template-columns:repeat(2,1fr)}.nya-mnav3{grid-template-columns:repeat(3,1fr)}
.nya-chatcard{padding:12px}
.nya-chatpick{margin-bottom:10px}
.nya-feed{height:min(58vh,520px);min-height:280px;overflow-y:auto;padding:10px 4px;display:flex;flex-direction:column;gap:10px;background:#fafcff;border:1px solid var(--line);border-radius:14px;margin-bottom:10px}
.nya-bub{max-width:88%;padding:10px 14px;border-radius:16px;font-size:15px;line-height:1.5;word-wrap:break-word}
.nya-bub.me{align-self:flex-end;background:var(--blue);color:#fff;border-bottom-right-radius:4px;margin-right:6px}
.nya-bub.bot{align-self:flex-start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:4px;margin-left:6px}
.nya-bub.err{align-self:flex-start;background:#fdecea;border:1px solid #f5c2c0;color:#7a1f1a;margin-left:6px}
.nya-bub.nya-wait{color:var(--muted);font-style:italic}
.nya-bub-img{display:block;max-width:100%;max-height:220px;border-radius:10px;margin-bottom:6px}
.nya-rich p{margin:0 0 .6em}.nya-rich p:last-child{margin-bottom:0}
.nya-rich h4{margin:.4em 0 .3em;font-size:15px}
.nya-rich ul,.nya-rich ol{margin:0 0 .6em 1.2em;padding:0}
.nya-rich li{margin:.15em 0}
.nya-speak{background:none;border:0;cursor:pointer;font-size:14px;opacity:.7;padding:2px 4px;margin-top:4px}.nya-speak:hover{opacity:1}
.nya-acts{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.nya-act{display:inline-flex;align-items:center;gap:5px;background:#f4f7fc;color:#111;border:1px solid var(--line);border-radius:999px;padding:5px 11px;font:inherit;font-size:13px;cursor:pointer}
.nya-act svg{width:16px;height:16px;display:block;stroke:#111}
.nya-act:hover{background:#e8f0fb}
.nya-bub.bot,.nya-bub.me{-webkit-user-select:text;user-select:text}
.nya-composer{background:#fff;border:1px solid #cfd8e6;border-radius:22px;padding:10px 12px 8px;box-shadow:0 2px 8px rgba(20,40,80,.06)}
.nya-composer:focus-within{border-color:#9cc4f7;box-shadow:0 0 0 3px #dbeafe}
.nya-composer .nya-q{display:block;width:100%;border:0;background:transparent;box-shadow:none;border-radius:0;padding:4px 2px;min-height:56px;max-height:200px;resize:none;font-size:16px;line-height:1.5}
.nya-composer .nya-q:focus{outline:0}
.nya-ctools{display:flex;align-items:center;gap:6px;margin-top:6px}
.nya-grow{flex:1}
.nya-ctools .nya-ibtn{width:40px;height:40px;border-radius:50%;border:0;background:transparent}
.nya-ctools .nya-ibtn:hover{background:#eef3fa}
.nya-file{display:none}
.nya-ibtn{flex:none;width:46px;height:46px;border-radius:12px;border:1px solid var(--line);background:#fff;color:#111;display:grid;place-items:center;font-size:18px;cursor:pointer}
.nya-ibtn svg{width:22px;height:22px;display:block;stroke:#111}
.nya-caret{display:inline-block;width:2px;height:1.05em;background:#111;margin-left:1px;vertical-align:-2px;animation:nya-blink 1s steps(1) infinite}
@keyframes nya-blink{50%{opacity:0}}
.nya-ibtn.on{background:#fde3e3;border-color:#e57373;animation:nya-pulse 1s infinite}
.nya-ibtn.on svg{stroke:#b3261e}
@keyframes nya-pulse{0%,100%{opacity:1}50%{opacity:.55}}
.nya-sendbtn{flex:none;width:40px;height:40px;border-radius:50%;border:0;background:var(--blue);color:#fff;display:grid;place-items:center;cursor:pointer;padding:0}
.nya-sendbtn svg{width:20px;height:20px;display:block;stroke:#fff}
.nya-sendbtn[disabled]{opacity:.35;cursor:not-allowed}
.nya-imgprev{align-items:center;gap:10px;background:#f1f6ff;border:1px solid var(--line);border-radius:12px;padding:6px 10px;margin-bottom:8px;font-size:13px}
.nya-imgprev img{width:44px;height:44px;object-fit:cover;border-radius:8px}
.nya-link{background:none;border:0;color:var(--blue);text-decoration:underline;cursor:pointer;font:inherit;padding:0}
.nya-pricing{padding:20px 12px}
.nya-price-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin:12px 0}
.nya-price{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px;text-align:center}
.nya-amt{font-size:24px;font-weight:800;color:var(--blue)}
@media (max-width:480px){.nya-feed{height:46vh;min-height:220px}.nya-bub{max-width:94%}}

.nya-tbl{overflow-x:auto;margin:6px 0 10px}.nya-tbl table{border-collapse:collapse;font-size:14px;min-width:60%}.nya-tbl th,.nya-tbl td{border:1px solid #cfd8e6;padding:6px 9px;text-align:left;vertical-align:top}.nya-tbl th{background:#eef4ff}
.nya-viz{margin:8px 0 10px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:6px;overflow:hidden}.nya-viz svg{width:100%;height:auto;display:block;max-height:420px}
.nya-pre{background:#f4f6fa;border:1px solid var(--line);border-radius:8px;padding:8px 10px;font-size:13px;overflow-x:auto;white-space:pre;margin:6px 0}
.nya-vizerr{color:var(--muted);font-style:italic}
.nya-math.display{display:block;text-align:center;margin:6px 0;overflow-x:auto}

.nya-installbar{display:flex;flex-wrap:wrap;align-items:center;gap:10px;background:#0f172a;color:#fff;border-radius:14px;padding:10px 12px;margin:0 0 12px;font-size:14px}
.nya-installbar[hidden],.nya-installhelp[hidden]{display:none}
.nya-installtxt{flex:1;min-width:150px;display:flex;flex-direction:column;line-height:1.3}
.nya-installtxt strong{font-size:15px}.nya-installtxt small{opacity:.8;font-size:12px}
.nya-installbtn{flex:none;background:var(--blue,#0b66d6);color:#fff;border:0;border-radius:10px;padding:9px 16px;font-weight:700;font-size:14px;cursor:pointer;min-height:40px}
.nya-installx{flex:none;background:none;border:0;color:#fff;font-size:26px;line-height:1;cursor:pointer;padding:0 4px;opacity:.8}
.nya-installhelp{flex-basis:100%;margin:0;font-size:13px;opacity:.95}

.nya-logo.img.badge{padding:0;border:0;background:none;border-radius:12px}
.nya-herologo.badge{padding:0;background:none;border-radius:0;max-height:64px;max-width:240px}