:root{
 --bg:#061426;--bg2:#091d34;--surface:#0d2440;--surface2:#102b4b;--surface3:#143556;
 --ink:#f3f8ff;--muted:#a9bfd6;--line:#1d4264;--primary:#08b9f2;--primary2:#1688f5;
 --accent:#31d5ff;--success:#39d6a5;--danger:#ff7185;--shadow:0 22px 60px rgba(0,0,0,.28)
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(ellipse at 50% -15%,#123d65 0,transparent 42%),var(--bg);color:var(--ink);font:16px/1.65 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}
a{color:#66d9ff;text-decoration:none}
a:hover{color:#b2efff}
.wrap{width:min(1120px,calc(100% - 36px));margin:auto}
header{position:sticky;top:0;background:rgba(5,18,33,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(80,164,218,.18);z-index:20}
.nav{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{font-size:1.42rem;font-weight:850;letter-spacing:-.5px;color:#f5fbff;display:inline-flex;align-items:center}
.mark{display:inline-grid;place-items:center;background:linear-gradient(145deg,#1b8cf5,#19d1ef);color:#fff;border-radius:11px;width:36px;height:36px;margin-right:9px;box-shadow:0 7px 22px #0aaef455}
.links{display:flex;align-items:center;gap:24px;color:#c4d8eb}
.links a{color:#c4d8eb;font-weight:600;font-size:.94rem}
.links a:hover{color:var(--accent)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:linear-gradient(110deg,#087fe8,#08bce9);color:white;border:1px solid #28c8f5;border-radius:12px;padding:12px 19px;font-weight:750;cursor:pointer;box-shadow:0 8px 24px rgba(0,153,230,.2);transition:transform .18s,filter .18s}
.btn:hover{color:white;filter:brightness(1.12);transform:translateY(-1px)}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.btn.light{background:#102e4e;color:#8fe5ff;border:1px solid #24577e;box-shadow:none}
.hero{padding:82px 0 76px;background:radial-gradient(ellipse at 78% 30%,rgba(0,174,238,.18),transparent 36%),linear-gradient(180deg,rgba(7,29,52,.3),transparent)}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:44px;align-items:center}
.hero h1{font-size:clamp(2.8rem,6vw,4.7rem);line-height:1.04;letter-spacing:-2.4px;margin:17px 0}
.grad{background:linear-gradient(100deg,#f4fbff,#39d5ff 65%,#168cf5);color:transparent;background-clip:text}
.hero p,.muted{color:var(--muted)}
.hero p{font-size:1.1rem;max-width:610px}
.art{border:1px solid #1d6591;border-radius:28px;padding:44px 25px;background:radial-gradient(circle at 50% 15%,#145d86,#0c2a4b 55%,#081b31);color:#8deaff;font-size:4.5rem;text-align:center;box-shadow:0 25px 65px rgba(0,0,0,.35),inset 0 0 45px #0aaee51c}
.art small{display:block;color:#d8f5ff;font-size:1rem;font-weight:700;margin-top:12px}
.section{padding:62px 0}
.center{text-align:center;max-width:700px;margin:0 auto 32px}
.center h2{font-size:clamp(1.8rem,4vw,2.5rem);margin:0 0 8px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:19px}
.card,.panel{background:linear-gradient(155deg,rgba(16,45,75,.98),rgba(9,29,51,.98));border:1px solid var(--line);border-radius:19px;padding:24px;box-shadow:var(--shadow)}
.card{transition:transform .2s,border-color .2s}
.card:hover{transform:translateY(-4px);border-color:#168fc4}
.card h3{margin:10px 0 4px;color:#f3f9ff}
.card p{color:var(--muted);font-size:.95rem}
.ico{font-size:1.9rem}
.pagehead{text-align:center;padding:58px 0 26px;background:radial-gradient(ellipse at 50% 0,rgba(0,164,230,.17),transparent 65%)}
.pagehead h1{font-size:clamp(2.25rem,5vw,3.4rem);margin:10px 0;color:#f4faff;letter-spacing:-1px}
.panel{max-width:880px;margin:25px auto;padding:30px}
.drop{border:2px dashed #2476a6;background:linear-gradient(145deg,#0a2039,#0c2b4b);border-radius:18px;text-align:center;padding:36px 22px;cursor:pointer;transition:border-color .2s,background .2s}
.drop:hover,.drop.drag{border-color:#27cafa;background:#103455}
.drop h2{margin:8px 0 2px;color:#f3faff}
.drop p{color:#a9c4dc;margin:5px 0}
.drop input{display:none}
.controls{display:grid;grid-template-columns:1fr 1fr;gap:17px;margin:22px 0}
.controls label,.field-label{display:block;font-weight:700;color:#e7f5ff;margin-bottom:7px}
.controls input,.controls select,.dimension-input{width:100%;padding:12px 13px;background:#071a2e;color:#f3faff;border:1px solid #285274;border-radius:11px;outline:none;min-height:46px}
.controls input:focus,.controls select:focus,.dimension-input:focus{border-color:#20c9f5;box-shadow:0 0 0 3px #08b9f222}
input[type=range]{accent-color:#12bdf2;padding:0!important}
.actions{display:flex;gap:11px;flex-wrap:wrap;margin-top:18px}
.preview{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px}
.preview>div{background:#071a2d;border:1px solid #1b3d5b;border-radius:14px;padding:14px;text-align:center;color:#dceeff}
.preview img{max-width:100%;max-height:270px;object-fit:contain;border-radius:8px;margin-top:10px}
.status{color:var(--muted);min-height:1.5em}
.status.success{color:var(--success)}
.status.error{color:var(--danger)}
.hidden{display:none!important}
.notice{background:#0b3040;border:1px solid #17647a;color:#b5efff;border-radius:12px;padding:14px 16px}
.prose{max-width:850px;margin:auto}
.prose p,.prose li{color:#c0d2e4}
.prose h2{margin-top:28px;color:#f3f8ff}
.prose h2:first-child{margin-top:0}
footer{background:#040f1d;color:#dcecff;padding:42px 0 24px;margin-top:50px;border-top:1px solid #173754}
footer p{color:#94acc3}
.footgrid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:25px}
.footgrid b{color:#f2f8ff}
.footlinks{display:grid;gap:8px;color:#b6cce0}
.footlinks a{color:#b6cce0}
.footlinks a:hover{color:#5cdbff}
.copyright{border-top:1px solid #1c3852;margin-top:25px;padding-top:15px;color:#91a9c1;font-size:.9rem}
.checkline{display:flex;align-items:center;gap:10px;color:#d9edff;margin:14px 0}
.checkline input{width:18px;height:18px;accent-color:#08b9f2}
.dimensions{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:22px 0}
.dimension-field{min-width:0}
.dimension-input{font-size:1rem}
@media(max-width:760px){
 .hero-grid{grid-template-columns:1fr;gap:28px}.grid{grid-template-columns:1fr 1fr}
 .links{gap:12px;font-size:.88rem}.nav>.btn{display:none}
}
@media(max-width:520px){
 .wrap{width:min(100% - 26px,1120px)}.grid,.controls,.preview,.footgrid,.dimensions{grid-template-columns:1fr}
 .hero{padding:48px 0}.panel{padding:17px}.links{gap:9px}.links a{font-size:.8rem}
 .links a:nth-child(2){display:none}.pagehead{padding-top:38px}
}