*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Arial,Helvetica,sans-serif;background:#f5f7fb;color:#111827;line-height:1.6}
body.dark{background:#0f172a;color:#f8fafc}
a{text-decoration:none;color:inherit}
header{position:sticky;top:0;z-index:1000;background:#fff;border-bottom:1px solid #e5e7eb}
.dark header{background:#111827;border-color:#1f2937}
.nav{max-width:1200px;margin:auto;min-height:70px;padding:0 20px;display:flex;align-items:center;justify-content:space-between}
.logo{font-size:25px;font-weight:800;color:#2563eb}
.navlinks{display:flex;gap:10px;align-items:center}
.navlinks a,.theme{padding:9px 12px;border-radius:8px;color:#475569}
.navlinks a:hover,.theme:hover{background:#eff6ff;color:#2563eb}
.theme{border:0;background:#f1f5f9;cursor:pointer;font-size:16px}
.dark .navlinks a{color:#cbd5e1}.dark .theme{background:#1f2937;color:#fff}
.hero{background:linear-gradient(135deg,#2563eb,#4f46e5);color:#fff;text-align:center;padding:80px 20px}
.hero h1{font-size:46px;margin-bottom:14px}
.hero p{max-width:720px;margin:auto;font-size:18px}
.search{max-width:650px;margin:28px auto 0}.search input{width:100%;padding:16px;border:0;border-radius:12px;font-size:16px}
.container{max-width:1200px;margin:auto;padding:20px}
.ad{max-width:1200px;margin:25px auto;padding:0 20px}.adbox{min-height:90px;border:1px dashed #cbd5e1;border-radius:12px;background:#fff;display:flex;align-items:center;justify-content:center;color:#94a3b8}
.dark .adbox{background:#111827;border-color:#334155}
.section-title{text-align:center;font-size:30px;margin:45px 0 25px}
.tools{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:#fff;padding:25px;border-radius:16px;box-shadow:0 8px 25px rgba(0,0,0,.06)}
.dark .card{background:#111827}
.card h2,.card h3{margin-bottom:10px}.card p{color:#64748b;margin-bottom:18px}.dark .card p{color:#94a3b8}
.btn{display:inline-block;background:#2563eb;color:#fff;border:0;padding:11px 17px;border-radius:9px;cursor:pointer}
.btn.secondary{background:#e2e8f0;color:#111827}.dark .btn.secondary{background:#334155;color:#fff}
.tool-page{max-width:1000px;margin:40px auto;padding:0 20px}
.tool-header{text-align:center;margin-bottom:25px}.tool-header h1{font-size:40px;margin-bottom:10px}.tool-header p{color:#64748b}.dark .tool-header p{color:#94a3b8}
.toolbox{background:#fff;padding:30px;border-radius:18px;box-shadow:0 8px 30px rgba(0,0,0,.06);margin-bottom:30px}.dark .toolbox{background:#111827}
input,select,textarea{width:100%;padding:13px;border:1px solid #dbe3ed;border-radius:9px;font:inherit;outline:none;margin-bottom:12px}
textarea{min-height:180px;resize:vertical}.dark input,.dark select,.dark textarea{background:#0f172a;color:#fff;border-color:#334155}
.result{padding:13px;background:#f1f5f9;border-radius:9px;margin-top:12px;font-weight:600;overflow-wrap:anywhere}.dark .result{background:#1e293b}
.keys{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px}.key{border:1px solid #bfdbfe;background:#eff6ff;color:#1d4ed8;padding:10px 13px;border-radius:8px;cursor:pointer;font-size:17px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.content{background:#fff;padding:30px;border-radius:16px;margin-top:30px}.dark .content{background:#111827}
.content h2{margin:28px 0 10px}.content p{color:#4b5563;margin-bottom:12px}.dark .content p{color:#cbd5e1}
.calc{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.calc button{padding:15px;border:0;border-radius:8px;cursor:pointer;font-size:16px;background:#e2e8f0}.calc .eq{background:#2563eb;color:#fff}
footer{background:#111827;color:#fff;margin-top:60px}.footer{max-width:1200px;margin:auto;padding:50px 20px 30px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:45px}.footer h2{margin-bottom:10px}.footer p,.footer a{color:#9ca3af}.footerlinks{display:flex;flex-direction:column;gap:9px}.bottom{border-top:1px solid #273244;text-align:center;padding:18px;color:#9ca3af}
.legal{max-width:900px;margin:50px auto;padding:0 20px}.legalbox{background:#fff;padding:40px;border-radius:18px}.dark .legalbox{background:#111827}.legal h1{font-size:40px;margin-bottom:10px}.legal h2{margin:28px 0 10px}.legal p{color:#4b5563;margin-bottom:12px}.dark .legal p{color:#cbd5e1}
@media(max-width:850px){.tools{grid-template-columns:1fr 1fr}.footer{grid-template-columns:1fr 1fr}.navlinks a:nth-child(n+3){display:none}}
@media(max-width:600px){.tools{grid-template-columns:1fr}.footer{grid-template-columns:1fr}.hero h1{font-size:34px}.tool-header h1{font-size:32px}}