:root{--bg:#f6f7f9;--panel:#fff;--text:#20242a;--muted:#667085;--line:#dde3ea;--primary:#1463ff;--accent:#008a5c;--warn:#b54708;--code:#101828}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.6;letter-spacing:0}
a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}
.site-header{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 18px;background:#fff;border-bottom:1px solid var(--line)}
.brand{font-weight:800;color:var(--text)}.site-header nav{display:flex;gap:12px;flex-wrap:wrap}.site-header nav a{color:#364152;font-size:14px}
.container{width:min(1120px,100%);margin:0 auto;padding:18px}.site-footer{padding:30px 18px;color:var(--muted);text-align:center}
.hero,.section,.tool-card,.result-card,.admin-box{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:18px;margin:0 0 16px}
.hero h1{margin:0 0 8px;font-size:clamp(26px,5vw,42px);line-height:1.15}.lead{color:var(--muted);margin:0}
.grid{display:grid;grid-template-columns:1fr;gap:14px}.tool-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px}
.tool-card h2,.tool-card h3{margin-top:0;font-size:20px}.meta{color:var(--muted);font-size:14px}
form.tool-form{display:grid;gap:14px}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
label{display:grid;gap:6px;font-weight:650}input,select,textarea{width:100%;padding:10px 12px;border:1px solid #cbd5e1;border-radius:6px;background:#fff;color:var(--text);font:inherit}textarea{min-height:220px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace}
button,.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;width:max-content;min-height:40px;padding:9px 14px;border:0;border-radius:6px;background:var(--primary);color:#fff;font-weight:700;cursor:pointer}.btn.secondary,button.secondary{background:#475467}
.summary-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:10px}.summary-item{background:#f8fafc;border:1px solid var(--line);border-radius:8px;padding:12px}.summary-item strong{display:block;font-size:13px;color:var(--muted)}.summary-item span{font-size:20px;font-weight:800}
.notice{border-left:4px solid var(--warn);background:#fff7ed;padding:12px;border-radius:6px}.ok{border-left-color:var(--accent);background:#ecfdf3}
.code-wrap{position:relative;margin:12px 0}.code-wrap button{position:absolute;right:8px;top:8px;background:#344054;min-height:32px;padding:6px 10px;font-size:12px}
pre{overflow:auto;background:var(--code);color:#e4e7ec;border-radius:8px;padding:44px 14px 14px}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}
.ad-slot{display:flex;align-items:center;justify-content:center;min-height:96px;margin:18px 0;border:1px dashed #b6c2d1;border-radius:8px;background:#f8fafc;color:var(--muted);font-size:14px}
.faq details{border-top:1px solid var(--line);padding:12px 0}.faq summary{cursor:pointer;font-weight:750}
.link-list{display:grid;gap:10px}.link-list a{display:grid;gap:4px;padding:12px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--text)}.link-list span{color:var(--muted);font-size:14px}
.table-wrap{overflow:auto}.admin-table{width:100%;border-collapse:collapse;background:#fff}.admin-table th,.admin-table td{padding:9px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.admin-table th{background:#f8fafc}
.admin-actions{display:flex;gap:8px;flex-wrap:wrap}.badge{display:inline-block;padding:2px 8px;border-radius:999px;background:#eef4ff;color:#1849a9;font-size:12px;font-weight:700}
.warning-box,.formula-box,.faq-box{background:#fff;border:1px solid var(--line);border-radius:8px;padding:16px;margin:0 0 16px}.warning-box{border-left:4px solid var(--warn);background:#fff7ed}.formula-box{border-left:4px solid var(--primary);background:#f5f8ff}.copy-button{background:#344054}.category-section{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:18px;margin:0 0 16px}.category-section>h2{margin-top:0}.tool-search input{margin-top:6px}.tool-card[style*="none"]{display:none!important}
@media (min-width:760px){.container{padding:28px}.grid.two{grid-template-columns:1.2fr .8fr}.hero,.section,.tool-card,.result-card,.admin-box{padding:22px}}