.tool-main{max-width:820px;margin:auto;padding:35px 20px 70px}.back{font-size:13px;font-weight:bold;color:var(--blue)}.tool-head{text-align:center;padding:30px 0 24px}.tool-head .icon{margin:0 auto 12px}.tool-head small{font-size:10px;letter-spacing:1.4px;color:var(--blue);font-weight:bold}.tool-head h1{font-size:clamp(30px,5vw,42px);margin:8px 0}.tool-head p{color:var(--muted);max-width:600px;margin:auto}.panel{padding:25px;border:1px solid var(--line);border-radius:18px;margin-bottom:18px;box-shadow:0 10px 30px #1a305c08}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.field{display:flex;flex-direction:column;gap:7px;font-size:13px;font-weight:bold;color:#45536a}.field.wide{grid-column:1/-1}.field input,.field textarea,.field select{width:100%;border:1px solid #dfe5f0;border-radius:10px;padding:12px;min-height:46px;background:white;color:var(--ink);outline:none}.field textarea{min-height:155px;resize:vertical}.field input:focus,.field textarea:focus,.field select:focus{border-color:#8baeff;box-shadow:0 0 0 3px #155eef14}.actions{display:flex;gap:10px;margin-top:19px;flex-wrap:wrap}.primary,.secondary{padding:12px 17px;border-radius:10px;font-weight:bold;font-size:13px;cursor:pointer}.primary{border:1px solid var(--blue);background:var(--blue);color:white}.secondary{border:1px solid var(--line);background:white;color:var(--ink)}.result{margin-top:18px;padding:16px;border-radius:12px;border:1px solid #cceedd;background:#f1fbf6;color:#126443;overflow-wrap:anywhere}.result strong{font-size:12px}.result .value{font-size:25px;font-weight:800;margin-top:5px}.result .detail{font-size:13px;margin-top:4px}.privacy{font-size:11px;color:var(--muted);margin:18px 0 0}.prose h2,.panel h2{font-size:19px;margin:0 0 9px}.prose h3{font-size:14px;margin:20px 0 5px}.prose p{font-size:14px;color:var(--muted);line-height:1.8;margin:0}.related{display:flex;gap:9px;flex-wrap:wrap}.related a{padding:8px 11px;background:#f8faff;border:1px solid #e3eaff;border-radius:8px;color:var(--blue);font-size:12px;font-weight:bold}body[dir=rtl] .tool-head small{letter-spacing:0}body[dir=rtl] .field{text-align:right}@media(max-width:550px){.tool-main{padding:25px 14px 48px}.panel{padding:18px}.fields{grid-template-columns:1fr}.field.wide{grid-column:auto}}

/* Standard calculator */
.basic-calculator{max-width:420px;margin:0 auto}.calc-display{width:100%;height:86px;border:1px solid #dfe5f0;border-radius:14px;background:#f7f9fd;padding:18px;text-align:end;font-size:clamp(28px,6vw,40px);font-weight:750;color:var(--ink);font-variant-numeric:tabular-nums}.calc-hint{font-size:11px;color:var(--muted);margin:9px 2px 14px}.calc-keys{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}.calc-key{min-height:58px;border:1px solid #e5eaf3;border-radius:12px;background:#fff;color:var(--ink);font-size:20px;font-weight:700;cursor:pointer;transition:background .15s,transform .15s}.calc-key:hover{background:#f4f7ff}.calc-key:active{transform:scale(.97)}.calc-key.operator{background:#edf3ff;color:#1d55cb;border-color:#dce6ff}.calc-key.utility{background:#f2f4f8;color:#47546a;font-size:14px}.calc-key.equals{background:var(--blue);border-color:var(--blue);color:#fff}.calc-key.equals:hover{background:#0f4fd5}.calc-error{color:#a02e22;font-size:12px;margin:12px 0 0}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}body[dir=rtl] .calc-display{direction:ltr;text-align:left}@media(max-width:450px){.calc-keys{gap:7px}.calc-key{min-height:54px}.calc-display{height:76px}}


/* Premium calculator treatment */
.basic-calculator{max-width:430px;padding:18px;border-radius:25px;background:linear-gradient(145deg,#201d43,#292552);box-shadow:0 22px 55px #211d4b2b;border:1px solid #514b82}.calc-display{height:104px;border:0;border-radius:16px;background:linear-gradient(145deg,#17152f,#211e43);padding:18px 19px;color:#fff;font-size:clamp(31px,7vw,44px);box-shadow:inset 0 2px 8px #0807194d}.calc-hint{color:#b7b4da;margin:12px 3px 17px}.calc-keys{gap:9px}.calc-key{min-height:61px;border:1px solid #ffffff14;border-radius:15px;background:#39365c;color:#fff;font-size:21px;box-shadow:0 3px 0 #15132f66;transition:transform .14s,background .14s,box-shadow .14s}.calc-key:hover{background:#494574}.calc-key:active{transform:translateY(2px) scale(.98);box-shadow:0 1px 0 #15132f66}.calc-key.operator{background:#5149a1;color:#e8e5ff;border-color:#6c63c7}.calc-key.operator:hover{background:#6259bd}.calc-key.utility{background:#e6e4f4;color:#393653;border-color:#e6e4f4}.calc-key.utility:hover{background:#fff}.calc-key.equals{background:linear-gradient(145deg,#887cff,#6354f1);border-color:#9288ff;color:white;box-shadow:0 4px 0 #4035ad}.calc-key.equals:hover{background:linear-gradient(145deg,#9b91ff,#7163ff)}.calc-key.equals:active{box-shadow:0 1px 0 #4035ad}.calc-error{color:#ffb8b8}.panel:has(.basic-calculator){padding:25px;background:linear-gradient(145deg,#fbfaff,#f5f4ff);border-color:#e9e5ff}.tool-head .icon{box-shadow:0 8px 20px #6354f11a}body[dir=rtl] .calc-display{direction:ltr;text-align:right}@media(max-width:450px){.basic-calculator{padding:13px;border-radius:21px}.calc-display{height:88px}.calc-keys{gap:7px}.calc-key{min-height:55px;border-radius:13px}}

html[data-theme="dark"] body .panel:has(.basic-calculator){background:linear-gradient(145deg,#211f35,#25213e);border-color:#393651}html[data-theme="dark"] .field{color:#d4d2ed}html[data-theme="dark"] .calc-key{border-color:#ffffff18}

.qr-output{display:flex;flex-direction:column;align-items:center;gap:1rem;padding:1.25rem;margin-top:1rem;border:1px solid var(--border,#ddd);border-radius:1rem}.qr-output #qrCanvas{padding:12px;background:#fff;border-radius:8px;min-height:40px;min-width:40px}.qr-output canvas,.qr-output img{display:block;max-width:100%;height:auto}.field select{max-width:100%}button:disabled{opacity:.6;cursor:wait}