:root{--ink:#142033;--muted:#56667c;--blue:#155eef;--navy:#11294b;--line:#dbe3ec;--soft:#f5f7fa;--radius:16px}
body{background:#fff;color:var(--ink)}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(140%) blur(10px)}
.header-inner{padding:15px 0}.mark{background:#155eef;border-radius:10px;padding:5px 9px}
.nav a{min-height:44px;display:inline-flex;align-items:center;padding:0 8px;border-radius:8px}.nav a:hover{background:#f1f5fb;text-decoration:none}
.hero-workbench{padding:68px 0 56px}.hero-workbench h1{max-width:720px;font-size:clamp(2.7rem,6vw,4.5rem);letter-spacing:-.06em}.hero-workbench .lead{max-width:620px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.hero-actions a{text-align:center}
.workbench-panel{padding:30px;background:#101f35;box-shadow:0 22px 60px #101f351c}.workbench-panel h2{font-size:1.55rem;letter-spacing:-.03em}
.workbench-list{display:grid;margin-top:22px;border-top:1px solid #ffffff2a}
.workbench-list a{display:grid;grid-template-columns:38px 1fr;gap:0 10px;padding:14px 2px;border-bottom:1px solid #ffffff2a;color:white}
.workbench-list a:hover{text-decoration:none;color:#dbeafe}.workbench-list a span{grid-row:span 2;color:#95b7ff;font:600 .8rem/1.5 ui-monospace,monospace}.workbench-list a small{color:#bac8da}
.section{padding:38px 0}.section-heading{align-items:end}.section-heading h2{margin:4px 0 0}.tool-card{min-height:214px;padding:24px;background:#fff}
.tool-card:hover{transform:translateY(-2px);transition:transform .18s,border-color .18s,box-shadow .18s}
.tool-card .icon{font:700 .8rem/1 ui-monospace,monospace;background:#eef4ff;color:#124fc4;border:1px solid #dce8ff}
.feature-row{padding:32px 0;border-block:1px solid var(--line)}
.network-workspace{border:1px solid var(--line);border-radius:18px;overflow:hidden;background:#fff;box-shadow:0 14px 42px #13233b0b}
.network-workspace-top{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:16px 22px;background:#f7f9fc;border-bottom:1px solid var(--line);font-size:.9rem}
.network-workspace-top>span:last-child{margin-left:auto;color:var(--muted);font-size:.84rem}.status-dot{width:9px;height:9px;border-radius:50%;background:#21855a;box-shadow:0 0 0 4px #21855a18}
.network-workspace-body{padding:clamp(18px,4vw,32px)}.network-form{display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,.55fr);align-items:end;gap:18px}
.network-field label{display:block;font-weight:700;margin-bottom:8px}.network-field input,.network-field select{width:100%;min-height:50px;padding:12px 14px;border:1px solid #aab8cb;border-radius:9px;background:#fff}
.network-field .fine{display:block;margin-top:7px}.network-form .actions{grid-column:1/-1;margin-top:3px}
.results-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:24px}.results-heading h2{margin:3px 0;font-size:1.3rem;overflow-wrap:anywhere}
.dns-results,.subnet-results{margin-top:24px;border-top:1px solid var(--line);padding-top:4px}.dns-results .table-scroll{max-height:440px}
.subnet-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:20px 0}
.subnet-grid>div{min-width:0;background:#f6f8fb;border:1px solid #e5eaf1;border-radius:10px;padding:14px}
.subnet-grid dt{font-size:.82rem;color:var(--muted)}.subnet-grid dd{margin:6px 0 0;font:650 1rem/1.45 ui-monospace,SFMono-Regular,Consolas,monospace;overflow-wrap:anywhere}
.ip-result{margin-top:22px;padding:24px;border:1px solid #d6e4ff;background:#f5f8ff;border-radius:14px}.ip-result output{display:block;font:700 clamp(1.5rem,5vw,2.3rem)/1.2 ui-monospace,monospace;overflow-wrap:anywhere}
@media(max-width:650px){.hero-workbench{padding:38px 0 30px}.workbench-panel{padding:23px}.network-form{grid-template-columns:1fr}.network-form .actions{grid-column:auto}.network-workspace-top>span:last-child{width:100%;margin-left:19px}.subnet-grid{grid-template-columns:1fr}.results-heading{align-items:flex-start;flex-direction:column}.hero-actions a{flex:1}.section-heading{align-items:flex-start}}
@media(prefers-reduced-motion:reduce){.tool-card:hover{transform:none;transition:none}}
@media(prefers-reduced-motion:reduce){.tool-card:hover{transform:none;transition:none}}
.consent-line{grid-column:1/-1;display:flex;align-items:flex-start;gap:10px;max-width:760px;color:var(--muted);font-size:.94rem;line-height:1.5}
.consent-line input{flex:0 0 auto;width:20px;height:20px;margin:1px 0 0;accent-color:var(--blue)}
.network-form>.fine{grid-column:1/-1;margin:0}
.dns-answer-list{margin:18px 0 0;padding-left:22px}
.dns-answer-list li{padding:8px 4px;font:500 .95rem/1.5 ui-monospace,SFMono-Regular,Consolas,monospace;overflow-wrap:anywhere;border-bottom:1px solid var(--line)}
.ip-result a{display:inline-flex;min-height:44px;align-items:center;margin-top:8px}
@media(max-width:650px){.consent-line{grid-column:auto}.network-form>.fine{grid-column:auto}}