:root{
  --max: 1120px;--bg:#06070b;--panel:#0b0f1c;--panel2:#0c1227;--text:#eaf0ff;--muted:#9cabca;--brand:#06b6d4;--brand2:#a78bfa;--line:rgba(255,255,255,.09);--shadow:0 20px 60px rgba(0,0,0,.42)}*{box-sizing:border-box}body{margin:0;font:16px/1.55 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial;color:var(--text);background:radial-gradient(900px 520px at 20% 0%,rgba(6,182,212,.18),transparent 60%),radial-gradient(900px 520px at 80% 20%,rgba(167,139,250,.18),transparent 60%),var(--bg)}a{color:inherit}.wrap{width:min(1200px,92vw);margin:0 auto}.bar{position:sticky;top:0;z-index:50;background:rgba(6,7,11,.7);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.bar__inner{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0}.brand{display:flex;gap:10px;align-items:center}.brand__mark{width:40px;height:40px;border-radius:14px;background:linear-gradient(135deg,var(--brand),var(--brand2));display:grid;place-items:center;color:#061018;font-weight:900}.brand__name{font-weight:900}.brand__sub{font-size:12px;color:var(--muted)}.bar__right{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.pill{padding:8px 10px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.03);text-decoration:none;color:var(--muted);font-size:13px}.main{padding:18px 0 46px}.hero{padding:16px;border-radius:22px;border:1px solid rgba(255,255,255,.1);background:linear-gradient(135deg,rgba(6,182,212,.12),rgba(167,139,250,.08));display:grid;grid-template-columns:1fr .8fr;gap:12px;align-items:center}h1,h2{margin:0 0 8px;line-height:1.15;letter-spacing:-.02em}h1{font-size:34px}h2{font-size:20px}.muted{color:var(--muted)}.hero__art{width:100%;min-height:260px;border-radius:18px;border:1px solid var(--line);box-shadow:var(--shadow);background:radial-gradient(700px 280px at 20% 20%,rgba(6,182,212,.22),transparent 60%),radial-gradient(700px 280px at 80% 30%,rgba(167,139,250,.18),transparent 60%),linear-gradient(180deg,rgba(0,0,0,.14),rgba(0,0,0,.30));position:relative;overflow:hidden}.hero__art:before{content:\"\";position:absolute;inset:-40%;background:radial-gradient(circle at 50% 50%,rgba(255,255,255,.10),transparent 60%);transform:rotate(-12deg)}.hero__art:after{content:\"\";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.06),transparent);transform:translateX(-60%);animation:shine 3.6s ease-in-out infinite;opacity:.7}@keyframes shine{0%{transform:translateX(-60%)}55%{transform:translateX(60%)}100%{transform:translateX(60%)}}.modes{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}.mode{padding:10px 12px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--text);cursor:pointer;font-weight:900}.mode.active{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#061018;border:0}.calc{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:14px}.calc__left,.calc__right{padding:16px;border-radius:22px;background:rgba(11,15,28,.6);border:1px solid var(--line)}.form{display:grid;gap:12px;margin-top:10px}.row{display:grid;grid-template-columns:1fr 1fr;gap:10px}label{display:grid;gap:6px;color:var(--muted);font-size:13px}input,select{padding:12px;border-radius:14px;border:1px solid var(--line);background:rgba(0,0,0,.25);color:var(--text);outline:none}.opts{display:flex;gap:10px;flex-wrap:wrap}.opt{display:flex;gap:8px;align-items:center;padding:8px 10px;border-radius:999px;border:1px solid rgba(255,255,255,.08);background:rgba(0,0,0,.18);color:var(--text)}.actions{display:flex;gap:10px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 12px;border-radius:14px;border:0;cursor:pointer;background:linear-gradient(135deg,var(--brand),var(--brand2));font-weight:900;color:#061018;text-decoration:none}.btn--ghost{background:transparent;border:1px solid var(--line);color:var(--text);font-weight:900}.result{border-radius:18px;border:1px solid rgba(255,255,255,.1);background:rgba(0,0,0,.18);overflow:hidden}.result__head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start;padding:14px 14px 10px;border-bottom:1px solid rgba(255,255,255,.08)}.result__title{font-weight:900}.price{font-weight:1000;font-size:22px;letter-spacing:-.02em}.result__body{padding:14px;display:grid;gap:10px}.kv{display:flex;justify-content:space-between;gap:12px;align-items:center}.hr{height:1px;background:rgba(255,255,255,.08)}.pre{margin:0;padding:12px;border-radius:14px;background:rgba(0,0,0,.22);border:1px solid rgba(255,255,255,.08);white-space:pre-wrap}.result__foot{display:flex;gap:10px;flex-wrap:wrap;padding:14px;border-top:1px solid rgba(255,255,255,.08)}.sr{position:absolute;left:-9999px;top:-9999px}
.brand__mark{background:transparent;border:1px solid var(--line);overflow:hidden}
.brand__img{width:100%;height:100%;object-fit:contain;display:block}
@media (max-width:980px){.hero,.calc{grid-template-columns:1fr}.row{grid-template-columns:1fr}}

/* === DEMO SITE watermark (auto) === */
html::before {
  content: "DEMO SITE";
  position: fixed;
  left: clamp(12px, calc((100vw - min(var(--max), (100vw - 2.5rem))) / 4), 96px);
  top: 50%;
  transform: translate(-50%, -50%) rotate(180deg);
  writing-mode: vertical-rl;
  font-weight: 800;
  letter-spacing: 0.28em;
  font-size: 45px;
  text-transform: uppercase;
  opacity: 0.34;
  color: rgba(255, 255, 255, 0.94);
  mix-blend-mode: difference;
  text-shadow: 0 10px 26px rgba(0, 0, 0, 0.45);
  pointer-events: none;
  user-select: none;
  z-index: 200;
}

@media (prefers-color-scheme: dark) {
  html::before {
    opacity: 0.36;
    color: rgba(242, 246, 255, 0.96);
    text-shadow: 0 10px 26px rgba(0, 0, 0, 0.65);
  }
}