:root{--bg:#f4f8f8;--surface:#fff;--text:#15253a;--muted:#63758a;--line:#d9e4e7;--accent:#0a9da5;--accent-soft:#e1f5f4;--shadow:0 12px 34px rgba(20,45,65,.06)}
[data-theme="dark"]{--bg:#0b1020;--surface:#141c30;--text:#edf4ff;--muted:#a8b6cc;--line:#293650;--accent:#35d7d4;--accent-soft:#14343d;--shadow:0 12px 34px rgba(0,0,0,.22)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;transition:background .2s,color .2s}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.wrap{width:min(1180px,calc(100% - 36px));margin:auto}.topbar{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-size:1.35rem;font-weight:900;letter-spacing:.02em;color:var(--text)}.brand span{color:var(--accent)}.navlinks{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.navlinks a,.theme-btn{padding:10px 13px;border:1px solid transparent;border-radius:13px;color:var(--text);font-weight:650}.navlinks a:hover,.theme-btn{border-color:var(--line);background:var(--surface);text-decoration:none}.theme-btn{cursor:pointer;font:inherit}.hero{text-align:center;padding:58px 0 34px}.eyebrow{color:var(--accent);font-size:.8rem;font-weight:850;letter-spacing:.16em;text-transform:uppercase}.hero h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.12;letter-spacing:-.045em;margin:12px 0}.hero p{max-width:760px;margin:0 auto;color:var(--muted);font-size:1.08rem}.section{padding:26px 0 58px}.tool-shell{background:var(--accent-soft);border:1px solid var(--line);border-radius:24px;padding:12px;display:grid;grid-template-columns:minmax(0,1.55fr) minmax(280px,.8fr);gap:12px}.panel{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:24px;min-width:0}.panel h2{font-size:1.22rem;margin:0 0 15px;line-height:1.3}.tabs{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;margin-bottom:12px}.tab{border:1px solid var(--line);background:var(--surface);color:var(--muted);border-radius:12px;padding:12px 5px;font:inherit;cursor:pointer;font-weight:700}.tab.active{background:var(--accent-soft);color:var(--accent);border-color:var(--accent)}label{display:block;font-weight:700;margin:12px 0 6px}input,textarea,select{width:100%;border:1px solid var(--line);border-radius:12px;background:var(--surface);color:var(--text);padding:13px 14px;font:inherit;outline:none}input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 16%,transparent)}textarea{min-height:90px;resize:vertical}.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.btn{border:1px solid var(--accent);border-radius:12px;padding:12px 17px;background:var(--accent);color:#fff;font:inherit;font-weight:800;cursor:pointer}.btn.secondary{background:var(--surface);color:var(--text);border-color:var(--line)}.btn:disabled{opacity:.45;cursor:not-allowed}.preview{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:390px;text-align:center}.qr-box{display:flex;align-items:center;justify-content:center;background:#fff;padding:18px;border-radius:16px;min-height:220px;min-width:220px;margin:10px 0 18px}.qr-box canvas,.qr-box img{max-width:100%;height:auto}.hint{color:var(--muted);font-size:.92rem}.color-row{display:flex;gap:18px;flex-wrap:wrap}.color-row label{display:flex;align-items:center;gap:8px;margin:8px 0}.color-row input{width:44px;height:38px;padding:3px}.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.feature-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:var(--shadow)}.feature-card .emoji{font-size:1.5rem}.feature-card h2,.feature-card h3{margin:8px 0 6px;font-size:1.15rem}.feature-card p{margin:0;color:var(--muted)}.content{max-width:900px;margin:0 auto}.content h2{margin-top:30px;font-size:1.35rem}.content p,.content li{color:var(--muted)}.content li{padding:3px 0}.cta{background:var(--accent-soft);border:1px solid var(--line);border-radius:18px;padding:22px;margin-top:28px}.footer{border-top:1px solid var(--line);background:var(--surface);margin-top:35px}.footer-main{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:26px 0;flex-wrap:wrap}.footer-links{display:flex;gap:16px;flex-wrap:wrap}.copyright{border-top:1px solid var(--line);padding:15px 0;color:var(--muted);font-size:.9rem;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.notice{background:var(--surface);border:1px solid var(--line);padding:15px 18px;border-radius:14px;color:var(--muted);margin-top:18px}.hidden{display:none!important}@media(max-width:850px){.tool-shell{grid-template-columns:1fr}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.tabs{grid-template-columns:repeat(3,minmax(0,1fr))}.preview{min-height:300px}}@media(max-width:560px){.wrap{width:min(100% - 24px,1180px)}.nav{padding:13px 0;align-items:flex-start;flex-direction:column}.navlinks{gap:4px}.navlinks a,.theme-btn{padding:8px 10px;font-size:.9rem}.hero{padding:42px 0 24px}.panel{padding:17px}.cards,.field-grid{grid-template-columns:1fr}.tabs{grid-template-columns:repeat(2,minmax(0,1fr))}.copyright{display:block}.copyright span{display:block;margin:5px 0}}