@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=Inter:wght@300;400;500;600;700&display=swap');
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#07090e;--surface:#0e1117;--surface2:#151b25;--surface3:#1c2433;
  --border:#1e2736;--border2:#2a3547;
  --text:#dde4f0;--muted:#6b7a94;--dim:#374357;
  --green:#2ecc71;--red:#e74c3c;--yellow:#f39c12;
  --accent:#4f8ef7;--accent2:#7eb0ff;
  --accent-bg:rgba(79,142,247,0.08);--accent-border:rgba(79,142,247,0.2);
}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:'Inter',sans-serif;font-size:14px;line-height:1.6;min-height:100vh}
a{color:inherit;text-decoration:none}
button{font-family:'Inter',sans-serif}

.nav{background:var(--surface);border-bottom:1px solid var(--border);height:58px;display:flex;align-items:center;justify-content:space-between;padding:0 28px;position:sticky;top:0;z-index:300}
.nav-left{display:flex;align-items:center;gap:32px}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{width:32px;height:32px;background:var(--accent);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:16px}
.logo-name{font-family:'IBM Plex Mono',monospace;font-size:16px;font-weight:600;color:var(--text)}
.logo-name span{color:var(--accent)}
.logo-tld{font-size:11px;color:var(--muted);background:var(--surface2);border:1px solid var(--border);padding:2px 6px;border-radius:4px;margin-left:2px;font-family:'IBM Plex Mono',monospace}
.nav-links{display:flex;gap:2px}
.nav-link{color:var(--muted);font-size:13px;font-weight:500;padding:7px 13px;border-radius:7px;transition:all 0.15s;cursor:pointer;border:none;background:none;white-space:nowrap}
.nav-link:hover{color:var(--text);background:var(--surface2)}
.nav-link.active{color:var(--accent);background:var(--accent-bg)}
.nav-badge{font-size:10px;font-weight:600;color:var(--accent);background:var(--accent-bg);border:1px solid var(--accent-border);padding:3px 8px;border-radius:4px}
.hamburger{display:none;background:none;border:none;color:var(--muted);font-size:20px;cursor:pointer;padding:4px}
.mobile-menu{display:none;background:var(--surface);border-bottom:1px solid var(--border);padding:12px 20px;flex-direction:column;gap:4px}
.mobile-menu.open{display:flex}
.mobile-link{color:var(--muted);font-size:13px;font-weight:500;padding:10px 12px;border-radius:7px;cursor:pointer;border:none;background:none;text-align:left;width:100%}
.mobile-link:hover{color:var(--text);background:var(--surface2)}

.hero{text-align:center;padding:56px 20px 40px;max-width:700px;margin:0 auto}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:var(--accent-bg);border:1px solid var(--accent-border);color:var(--accent);font-size:11px;font-weight:500;letter-spacing:0.06em;padding:4px 14px;border-radius:20px;margin-bottom:18px}
.hero-dot{width:6px;height:6px;background:var(--green);border-radius:50%;animation:blink 2s infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:0.2}}
.hero h1{font-size:clamp(26px,4.5vw,42px);font-weight:700;line-height:1.18;margin-bottom:12px;letter-spacing:-0.02em}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero-sub{font-size:15px;color:var(--muted);max-width:500px;margin:0 auto 32px;line-height:1.65}

.search-card{background:var(--surface);border:1px solid var(--border2);border-radius:12px;padding:22px;max-width:720px;margin:0 auto 28px}
.search-row{display:flex;gap:8px}
.s-input{flex:1;background:var(--surface2);border:1px solid var(--border);color:var(--text);font-family:'IBM Plex Mono',monospace;font-size:13px;padding:12px 16px;border-radius:8px;outline:none;transition:border 0.2s;min-width:0}
.s-input:focus{border-color:var(--accent)}
.s-input::placeholder{color:var(--dim)}
.s-select{background:var(--surface2);border:1px solid var(--border);color:var(--text);font-family:'IBM Plex Mono',monospace;font-size:12px;padding:12px 10px;border-radius:8px;outline:none;cursor:pointer;min-width:78px}
.s-btn{background:var(--accent);color:#fff;font-weight:600;font-size:12px;letter-spacing:0.05em;text-transform:uppercase;padding:12px 22px;border:none;border-radius:8px;cursor:pointer;transition:all 0.2s;white-space:nowrap;display:flex;align-items:center;gap:8px}
.s-btn:hover{background:var(--accent2)}
.s-btn:disabled{opacity:0.45;cursor:not-allowed}
.type-pills{display:flex;gap:5px;margin-top:12px;flex-wrap:wrap}
.type-pill{font-family:'IBM Plex Mono',monospace;font-size:10px;padding:4px 10px;border-radius:4px;cursor:pointer;background:var(--surface2);border:1px solid var(--border);color:var(--muted);transition:all 0.15s;font-weight:500}
.type-pill:hover,.type-pill.active{background:var(--accent-bg);border-color:var(--accent-border);color:var(--accent)}
.spinner{width:13px;height:13px;border:2px solid rgba(255,255,255,0.25);border-top-color:#fff;border-radius:50%;animation:spin 0.6s linear infinite;display:none}
@keyframes spin{to{transform:rotate(360deg)}}

.main-layout{max-width:1200px;margin:0 auto;padding:0 20px 60px;display:grid;grid-template-columns:1fr 300px;gap:22px;align-items:start}
.results-panel{background:var(--surface);border:1px solid var(--border);border-radius:10px;overflow:hidden}
.r-topbar{padding:12px 20px;background:var(--surface2);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px}
.r-stats{display:flex;gap:14px}
.rstat{display:flex;align-items:center;gap:5px;font-size:12px;font-weight:500}
.rsdot{width:7px;height:7px;border-radius:50%;flex-shrink:0}
.domain-chip{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--accent);background:var(--accent-bg);border:1px solid var(--accent-border);padding:3px 10px;border-radius:4px}
.r-thead{display:grid;grid-template-columns:210px 1fr 85px 46px;padding:9px 20px;border-bottom:2px solid var(--border2);background:var(--surface2)}
.r-thead span{font-size:9px;font-weight:700;letter-spacing:0.2em;text-transform:uppercase;color:var(--dim)}
.r-thead span:last-child{text-align:right}
.r-row{display:grid;grid-template-columns:210px 1fr 85px 46px;padding:13px 20px;border-bottom:1px solid var(--border);align-items:center;transition:background 0.1s}
.r-row:last-child{border-bottom:none}
.r-row:hover{background:var(--surface2)}
.loc-name{font-size:12px;font-weight:500;display:flex;align-items:center;gap:7px}
.loc-flag{font-size:15px;flex-shrink:0}
.loc-isp{font-size:10px;color:var(--muted);padding-left:22px;margin-top:2px}
.ip-wrap{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--accent2)}
.ip-line{display:block;line-height:1.9}
.ip-none{color:var(--dim)}
.ttl-wrap{font-family:'IBM Plex Mono',monospace;font-size:10px;color:var(--muted)}
.status-wrap{display:flex;justify-content:flex-end}
.dot-ok{width:9px;height:9px;border-radius:50%;background:var(--green)}
.dot-fail{width:9px;height:9px;border-radius:50%;background:var(--red)}
.dot-pend{width:9px;height:9px;border-radius:50%;background:var(--yellow);animation:pulse 1s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:0.2}}
.empty-state{padding:56px 20px;text-align:center}
.empty-mono{font-family:'IBM Plex Mono',monospace;font-size:24px;opacity:0.15;margin-bottom:12px}
.empty-title{font-size:14px;font-weight:600;margin-bottom:5px}
.empty-desc{font-size:12px;color:var(--muted)}
.skel-row{display:grid;grid-template-columns:210px 1fr 85px 46px;padding:13px 20px;border-bottom:1px solid var(--border);align-items:center;gap:8px}
.skel{background:var(--surface3);border-radius:3px;animation:sk 1.3s infinite}
@keyframes sk{0%,100%{opacity:0.2}50%{opacity:0.5}}

.sidebar{display:flex;flex-direction:column;gap:16px}
.sb-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;overflow:hidden}
.sb-head{font-size:10px;font-weight:700;letter-spacing:0.18em;text-transform:uppercase;color:var(--muted);padding:11px 16px;border-bottom:1px solid var(--border);background:var(--surface2)}
.sb-body{padding:12px 14px}
.qi-row{display:flex;justify-content:space-between;align-items:center;padding:7px 0;border-bottom:1px solid var(--border);font-size:12px}
.qi-row:last-child{border-bottom:none}
.qi-label{color:var(--muted)}
.qi-val{font-family:'IBM Plex Mono',monospace;font-size:11px;font-weight:500}
.tool-item{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px solid var(--border);color:var(--text);font-size:12px;font-weight:500;cursor:pointer;transition:color 0.15s}
.tool-item:last-child{border-bottom:none}
.tool-item:hover{color:var(--accent)}
.tool-icon{width:28px;height:28px;background:var(--surface2);border:1px solid var(--border);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:13px;flex-shrink:0}

.page-header{background:var(--surface);border-bottom:1px solid var(--border);padding:36px 28px}
.page-header-inner{max-width:1200px;margin:0 auto}
.page-header h1{font-size:clamp(22px,3vw,32px);font-weight:700;letter-spacing:-0.02em;margin-bottom:8px}
.page-header p{font-size:13px;color:var(--muted);max-width:640px;line-height:1.7}
.content-area{max-width:1200px;margin:0 auto;padding:28px 20px 70px}

.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin-bottom:32px}
.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:20px;cursor:pointer;transition:all 0.2s;display:block;text-decoration:none}
.tool-card:hover{border-color:var(--accent-border);background:var(--surface2);transform:translateY(-2px)}
.tool-card-icon{width:40px;height:40px;background:var(--accent-bg);border:1px solid var(--accent-border);border-radius:9px;display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:14px}
.tool-card h3{font-size:13px;font-weight:600;margin-bottom:5px}
.tool-card p{font-size:11px;color:var(--muted);line-height:1.6}

.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.blog-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:22px;cursor:pointer;transition:all 0.2s;display:flex;flex-direction:column}
.blog-card:hover{border-color:var(--accent-border);transform:translateY(-2px)}
.blog-cat{font-size:9px;font-weight:700;letter-spacing:0.18em;text-transform:uppercase;color:var(--accent);margin-bottom:10px}
.blog-card h3{font-size:14px;font-weight:600;line-height:1.4;margin-bottom:8px}
.blog-card p{font-size:12px;color:var(--muted);line-height:1.65;flex:1}
.blog-meta{display:flex;align-items:center;gap:10px;margin-top:14px;font-size:11px;color:var(--dim)}
.blog-filter{font-size:11px;font-weight:500;padding:5px 14px;border-radius:20px;cursor:pointer;background:var(--surface2);border:1px solid var(--border);color:var(--muted);transition:all 0.15s}
.blog-filter:hover,.blog-filter.active{background:var(--accent-bg);border-color:var(--accent-border);color:var(--accent)}

.country-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
.dns-table{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--border);border-radius:8px;overflow:hidden;margin-bottom:8px}
.dns-table th{font-size:9px;font-weight:700;letter-spacing:0.2em;text-transform:uppercase;color:var(--dim);padding:9px 16px;background:var(--surface2);text-align:left;border-bottom:1px solid var(--border2)}
.dns-table td{font-size:12px;padding:11px 16px;border-bottom:1px solid var(--border);font-family:'IBM Plex Mono',monospace}
.dns-table tr:last-child td{border-bottom:none}
.dns-table tr:hover td{background:var(--surface2)}
.dns-table td:first-child{color:var(--accent2)}
.dns-table td:nth-child(2){color:var(--muted)}
.dns-table td:nth-child(3){color:var(--muted);font-family:'Inter',sans-serif;font-size:11px}

.article-wrap{max-width:780px;margin:0 auto;padding:32px 20px 80px}
.article-header{margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid var(--border)}
.article-cat{font-size:10px;font-weight:700;letter-spacing:0.18em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
.article-header h1{font-size:clamp(22px,3.5vw,34px);font-weight:700;line-height:1.25;letter-spacing:-0.02em;margin-bottom:12px}
.article-meta{font-size:12px;color:var(--muted);display:flex;gap:16px;flex-wrap:wrap}
.article-body h2{font-size:18px;font-weight:600;margin:28px 0 10px}
.article-body h3{font-size:15px;font-weight:600;margin:20px 0 8px;color:var(--accent2)}
.article-body p{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:14px}
.article-body ul,.article-body ol{padding-left:20px;margin-bottom:14px}
.article-body li{font-size:14px;color:var(--muted);line-height:1.75;margin-bottom:5px}
.article-body strong{color:var(--text);font-weight:600}
.code-block{font-family:'IBM Plex Mono',monospace;font-size:12px;background:var(--surface2);border:1px solid var(--border);color:var(--accent2);padding:14px 16px;border-radius:8px;margin:14px 0;line-height:1.6}
.info-box{background:var(--accent-bg);border:1px solid var(--accent-border);border-radius:8px;padding:14px 16px;margin:16px 0;font-size:13px;color:var(--accent2);line-height:1.65}

.seo-grid{max-width:1200px;margin:0 auto;padding:0 20px 60px;display:grid;grid-template-columns:1fr 1fr;gap:16px}
.seo-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:24px}
.seo-card h2{font-size:15px;font-weight:600;margin-bottom:10px}
.seo-card h3{font-size:12px;font-weight:600;color:var(--accent);margin:12px 0 5px}
.seo-card p,.seo-card li{font-size:12px;color:var(--muted);line-height:1.75}
.seo-card ul{padding-left:16px}
.seo-card li{margin-bottom:4px}

.static-page{max-width:800px;margin:0 auto;padding:40px 20px 80px}
.static-page h1{font-size:clamp(24px,3vw,36px);font-weight:700;margin-bottom:8px;letter-spacing:-0.02em}
.static-page .lead{font-size:15px;color:var(--muted);margin-bottom:32px;line-height:1.7}
.static-page h2{font-size:18px;font-weight:600;margin:32px 0 10px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.static-page h3{font-size:14px;font-weight:600;color:var(--accent2);margin:18px 0 6px}
.static-page p{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:12px}
.static-page ul{padding-left:20px;margin-bottom:14px}
.static-page li{font-size:14px;color:var(--muted);line-height:1.75;margin-bottom:5px}
.static-page a{color:var(--accent)}
.static-page strong{color:var(--text);font-weight:600}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:32px}
.contact-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:22px;text-align:center}
.contact-card .icon{font-size:28px;margin-bottom:10px}
.contact-card h3{font-size:14px;font-weight:600;margin-bottom:6px}
.contact-card p{font-size:12px;color:var(--muted)}
.contact-card a{color:var(--accent);font-size:13px}
.form-group{margin-bottom:16px}
.form-label{font-size:12px;font-weight:500;color:var(--muted);display:block;margin-bottom:6px;letter-spacing:0.05em;text-transform:uppercase}
.form-input,.form-textarea{width:100%;background:var(--surface2);border:1px solid var(--border);color:var(--text);font-family:'Inter',sans-serif;font-size:13px;padding:12px 14px;border-radius:8px;outline:none;transition:border 0.2s}
.form-input:focus,.form-textarea:focus{border-color:var(--accent)}
.form-textarea{min-height:120px;resize:vertical}
.form-btn{background:var(--accent);color:#fff;font-weight:600;font-size:13px;padding:13px 28px;border:none;border-radius:8px;cursor:pointer;transition:opacity 0.2s}
.form-btn:hover{opacity:0.85}

footer{background:var(--surface);border-top:1px solid var(--border);padding:40px 28px 28px}
.footer-inner{max-width:1200px;margin:0 auto}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}
.footer-brand p{font-size:12px;color:var(--muted);line-height:1.7;max-width:240px;margin-top:10px}
.footer-col h4{font-size:11px;font-weight:700;letter-spacing:0.15em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.footer-col a{display:block;font-size:12px;color:var(--muted);margin-bottom:7px;transition:color 0.15s;cursor:pointer}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-copy{font-size:11px;color:var(--dim)}
.footer-links{display:flex;gap:16px}
.footer-links a{font-size:11px;color:var(--dim);cursor:pointer;transition:color 0.15s}
.footer-links a:hover{color:var(--muted)}

.lookup-table{width:100%;border-collapse:collapse;background:var(--surface);border:1px solid var(--border);border-radius:10px;overflow:hidden}
.lookup-table th{font-size:9px;font-weight:700;letter-spacing:0.2em;text-transform:uppercase;color:var(--dim);padding:10px 18px;background:var(--surface2);text-align:left;border-bottom:2px solid var(--border2)}
.lookup-table td{font-size:12px;padding:13px 18px;border-bottom:1px solid var(--border);vertical-align:top;line-height:1.6}
.lookup-table tr:last-child td{border-bottom:none}
.lookup-table tr:hover td{background:var(--surface2)}
.lookup-table td:first-child{font-family:'IBM Plex Mono',monospace;color:var(--accent);font-size:11px;white-space:nowrap;width:80px}
.lookup-table td:nth-child(2){font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--accent2)}
.lookup-table td:nth-child(3){font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--muted)}

.ip-tool-result{background:var(--surface);border:1px solid var(--border);border-radius:10px;overflow:hidden;margin-top:20px}
.ip-result-header{padding:16px 20px;background:var(--surface2);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:12px}
.ip-result-flag{font-size:28px}
.ip-result-ip{font-family:'IBM Plex Mono',monospace;font-size:18px;font-weight:600;color:var(--accent)}
.ip-result-body{display:grid;grid-template-columns:1fr 1fr;gap:0}
.ip-result-row{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;border-bottom:1px solid var(--border);font-size:13px}
.ip-result-row:last-child{border-bottom:none}
.ip-result-label{color:var(--muted)}
.ip-result-val{font-family:'IBM Plex Mono',monospace;font-size:12px;font-weight:500;text-align:right}

@media(max-width:960px){
  .main-layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .seo-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .ip-result-body{grid-template-columns:1fr}
}
@media(max-width:640px){
  .nav-links{display:none}
  .hamburger{display:block}
  .r-thead{display:none}
  .r-row{grid-template-columns:1fr 90px 36px}
  .ttl-wrap{display:none}
  .skel-row{grid-template-columns:1fr 90px 36px}
  .hero{padding:36px 16px 28px}
  .search-card{padding:14px}
  .content-area{padding:20px 14px 60px}
  .seo-grid{padding:0 14px 40px}
  .footer-grid{grid-template-columns:1fr}
  .blog-grid{grid-template-columns:1fr}
  .main-layout{padding:0 14px 50px}
  .nav{padding:0 16px}
}
@media(max-width:420px){
  .r-row{grid-template-columns:1fr 36px}
  .ip-wrap{display:none}
}

/* ── LIGHT MODE ── */
body.light{
  --bg:#f0f4f8;--surface:#ffffff;--surface2:#f0f4f8;--surface3:#e2e8f0;
  --border:#d1dbe8;--border2:#b8c8da;
  --text:#1a2340;--muted:#4a5a72;--dim:#8a9ab2;
  --accent:#1a56db;--accent2:#1e40af;
  --accent-bg:rgba(26,86,219,0.07);--accent-border:rgba(26,86,219,0.2);
}
body.light .nav{background:#ffffff;border-bottom:1px solid #d1dbe8}
body.light footer{background:#ffffff;border-top:1px solid #d1dbe8}
body.light .page-header{background:#ffffff;border-bottom:1px solid #d1dbe8}
body.light .results-panel{background:#ffffff}
body.light .r-thead{background:#f0f4f8}
body.light .r-row:hover{background:#f0f4f8}
body.light .sb-card{background:#ffffff}
body.light .sb-head{background:#f0f4f8}
body.light .search-card{background:#ffffff}
body.light .s-input{background:#f0f4f8;border-color:#d1dbe8}
body.light .s-select{background:#f0f4f8;border-color:#d1dbe8}
body.light .tool-card{background:#ffffff}
body.light .tool-card:hover{background:#f0f4f8}
body.light .blog-card{background:#ffffff}
body.light .seo-card{background:#ffffff}
body.light .info-box{background:rgba(26,86,219,0.06);border-color:rgba(26,86,219,0.18)}
body.light .code-block{background:#f0f4f8;border-color:#d1dbe8;color:#1a56db}
body.light .dns-table{background:#ffffff}
body.light .dns-table th{background:#f0f4f8}
body.light .lookup-table{background:#ffffff}
body.light .lookup-table th{background:#f0f4f8}
body.light .ip-tool-result{background:#ffffff}
body.light .ip-result-header{background:#f0f4f8}
body.light .mobile-menu{background:#ffffff}
body.light .static-page h2{border-bottom-color:#d1dbe8}
body.light .contact-card{background:#ffffff;border:1px solid #d1dbe8;border-radius:10px}

/* ── THEME TOGGLE BUTTON ── */
.theme-toggle{
  width:36px;height:36px;border-radius:8px;
  border:1px solid var(--border2);background:var(--surface2);
  color:var(--muted);font-size:16px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  transition:all 0.2s;flex-shrink:0;
}
.theme-toggle:hover{border-color:var(--accent-border);color:var(--accent);background:var(--accent-bg)}