:root{--accent:#2563eb;--accent2:#1d4ed8;--ink:#172033;--muted:#667085;--line:#e5eaf1;--bg:#f7f9fc;--danger:#b42318;--success:#067647}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:16px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg)}a{color:inherit}.container{width:min(1120px,calc(100% - 32px));margin:auto}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line)}.nav-wrap{width:min(1120px,calc(100% - 32px));min-height:72px;margin:auto;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:10px;color:var(--accent);font-size:20px;font-weight:850;text-decoration:none}.brand small{display:block;color:var(--muted);font-size:11px;font-weight:500}.logo{width:34px;height:34px;display:grid;place-items:center;border-radius:9px;background:var(--accent);color:#fff}.nav{margin-left:auto;display:flex;gap:24px}.nav a{text-decoration:none;font-size:14px;font-weight:700}.nav a:hover{color:var(--accent)}.menu-btn{display:none;margin-left:auto}.hero{text-align:center;padding:92px 0 72px}.hero .eyebrow{color:var(--accent);font-size:13px;font-weight:850;text-transform:uppercase;letter-spacing:.12em}.hero h1{font-size:clamp(40px,7vw,68px);line-height:1.02;letter-spacing:-.045em;margin:12px 0 18px}.hero p{max-width:660px;margin:0 auto 30px;color:var(--muted);font-size:clamp(18px,2.5vw,22px)}.btn,button{border:0;border-radius:10px;min-height:46px;padding:12px 20px;background:var(--accent);color:#fff;font:inherit;font-weight:750;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;cursor:pointer}.btn:hover,button:hover{background:var(--accent2)}button.secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}input:focus,select:focus,textarea:focus,button:focus,a:focus{outline:3px solid 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20px;background:#fff;border-top:1px solid var(--line);color:var(--muted);font-size:14px}.footer-grid{display:flex;justify-content:space-between;gap:30px}.footer-grid strong{color:var(--ink)}.footer-grid p{margin:5px 0}.footer-grid nav{display:flex;flex-wrap:wrap;gap:18px}.footer-grid a{text-decoration:none}.copyright{margin-top:25px;padding-top:18px;border-top:1px solid var(--line);font-size:12px}.tool-page,.content-page{padding-top:46px}.tool-page>h1,.content-page>h1{font-size:clamp(32px,5vw,48px);letter-spacing:-.035em;margin:18px 0 4px}.back{font-size:14px;color:var(--accent);font-weight:700;text-decoration:none}.tool-box,.content-card{max-width:820px;margin:30px 0;padding:28px;background:#fff;border:1px solid var(--line);border-radius:16px}.content-card h2{margin-top:30px}.content-card h2:first-child{margin-top:0}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.field{display:grid;gap:7px;margin-bottom:14px}.full{grid-column:1/-1}label{font-size:14px;font-weight:750}input,select,textarea{width:100%;min-height:46px;padding:10px 12px;border:1px solid #ccd4e0;border-radius:9px;background:#fff;color:var(--ink);font:inherit}textarea{min-height:105px;resize:vertical}input[type=color]{padding:5px}input[type=range]{padding:0}.options{border:1px solid var(--line);border-radius:9px;padding:12px}.options summary{cursor:pointer;font-weight:750}.options .form-grid{margin-top:14px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}.privacy-note{font-size:13px;color:var(--muted);padding:11px 13px;background:#f8fafc;border-radius:8px}.message{display:none;margin:15px 0 0;padding:11px 13px;border-radius:8px;background:#f1f5f9;color:var(--muted)}.message.show{display:block}.message.error{background:#fff1f0;color:var(--danger)}.message.success{background:#ecfdf3;color:var(--success)}.result{margin-top:24px;padding-top:24px;border-top:1px solid var(--line)}.result[hidden]{display:none}.preview{max-width:100%;max-height:420px;display:block;border:1px solid var(--line);border-radius:10px}.qr-output{display:grid;place-items:center;padding:24px;background:#fafbfd;border:1px dashed #ccd4e0;border-radius:12px;overflow:auto}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:16px 0}.stat{padding:12px;background:#f8fafc;border:1px solid var(--line);border-radius:10px}.stat span{display:block;color:var(--muted);font-size:12px}.stat strong{font-size:18px}.inline-check{display:flex;gap:9px;align-items:center}.inline-check input{width:auto;min-height:auto}.calc-result{padding:18px;border-radius:10px;background:#f4f7ff;color:var(--accent);font-size:24px;font-weight:850}.file-list{list-style:none;padding:0;display:grid;gap:8px}.file-item{display:flex;align-items:center;gap:8px;padding:10px;border:1px solid var(--line);border-radius:9px}.file-item span{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-item button{min-height:36px;padding:7px 10px;font-size:13px}.ad-slot{margin:52px 0;padding:20px;border:1px dashed #d5dae3;border-radius:12px;color:#98a2b3;text-align:center;font-size:12px}.learn{max-width:820px}.related{display:flex;flex-wrap:wrap;gap:10px}.related a{padding:10px 13px;background:#fff;border:1px solid var(--line);border-radius:9px;text-decoration:none}.notice{max-width:820px;padding:14px;border-left:4px solid var(--accent);background:#eef4ff;border-radius:6px}.not-found{text-align:center;padding:110px 0}.not-found .code{font-size:80px;font-weight:900;color:var(--accent)}
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@media(max-width:520px){.container,.nav-wrap{width:min(100% - 24px,1120px)}.brand small{display:none}.tool-grid,.form-grid,.stats{grid-template-columns:1fr}.full{grid-column:auto}.tool-box,.content-card{padding:20px}.actions>*{width:100%}.footer-grid{flex-direction:column}.file-item{flex-wrap:wrap}.file-item span{width:100%;flex-basis:100%}}