:root{--ink:#161B26;--mut:#5A6472;--line:#E4E8EE;--bg:#FFFFFF;--wash:#F5F7FA;--acc:#4F46E5;--acc2:#0D9488;--hl:#FDE68A}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65;font-size:16px}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}
header{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(255,255,255,.96);backdrop-filter:blur(5px);z-index:10}
.head{display:flex;justify-content:space-between;align-items:center;padding:12px 18px;flex-wrap:wrap;gap:6px}
.logo{font-weight:800;font-size:20px;color:var(--ink);text-decoration:none}.logo span{color:var(--acc)}
.langs a{color:var(--mut);text-decoration:none;font-size:12.5px;font-weight:700;margin-left:9px}.langs a.on{color:var(--acc)}
h1{font-size:30px;line-height:1.25;margin:26px 0 10px}h2{font-size:21px;margin:1.6em 0 .5em}h3{font-size:16.5px;margin:1.2em 0 .3em}
.intro{color:var(--mut);max-width:780px;margin:0 0 20px}
.card{background:var(--wash);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:14px 0}
.card h2{margin:0 0 4px;font-size:17px}.sub{color:var(--mut);font-size:13.5px;margin:0 0 10px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.grid .card{margin:0}
label{display:block;font-size:13px;color:var(--mut);margin:8px 0}
input{width:100%;padding:9px 12px;border:1.5px solid var(--line);border-radius:9px;font-size:15px;margin-top:3px}
input:focus{outline:none;border-color:var(--acc)}
button{background:var(--acc);color:#fff;border:0;border-radius:9px;padding:10px 20px;font-size:15px;font-weight:700;cursor:pointer}
button:hover{background:#4338CA}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.row input{max-width:240px}
.res{font-weight:800;color:var(--acc2);font-size:17px}
.out{display:flex;justify-content:space-between;border-top:1px dashed var(--line);padding:7px 2px 0;margin-top:7px;font-size:14px}
.out b{font-variant-numeric:tabular-nums;color:var(--acc)}
.tscroll{overflow-x:auto;border:1px solid var(--line);border-radius:12px}
table.zt{border-collapse:collapse;font-size:12.5px;font-variant-numeric:tabular-nums;width:100%;min-width:760px}
.zt th,.zt td{border:1px solid var(--line);padding:4px 6px;text-align:center}
.zt thead th{background:#161B26;color:#fff;position:sticky;top:0}
.zt tbody th{background:var(--wash);font-weight:700}
.zt td.hl{background:var(--hl);font-weight:800;outline:2px solid #D97706}
.steps li{margin:8px 0}
.dl .dlb{display:inline-block;background:#fff;border:1.5px solid var(--acc);color:var(--acc);border-radius:9px;padding:10px 16px;margin:6px 8px 0 0;text-decoration:none;font-weight:700;font-size:14px}
.dl .dlb:hover{background:var(--acc);color:#fff}
footer{border-top:1px solid var(--line);margin-top:44px;padding:22px 0;color:var(--mut);font-size:13px}
@media(max-width:640px){h1{font-size:24px}}