*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f7f9fc;color:#142033;font-family:Inter,"Noto Sans KR",Pretendard,system-ui,-apple-system,sans-serif;line-height:1.65}a{color:#0759c7;text-underline-offset:3px}a:hover{color:#003f91}button,input,select{font:inherit}button{cursor:pointer}.skip{position:absolute;left:-9999px;top:0}.skip:focus{left:1rem;top:1rem;z-index:100;background:#fff;padding:.7rem 1rem;border:2px solid #0759c7}.topbar{background:#09182c;color:#dceaff;font-size:.82rem}.topbar .wrap{padding:.45rem 1.25rem}.site-header{background:#fff;border-bottom:1px solid #d9e2ef;position:sticky;top:0;z-index:20}.header-inner{max-width:1160px;margin:auto;display:flex;align-items:center;justify-content:space-between;padding:.95rem 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0}.submit{width:100%;border:0;background:#0759c7;color:#fff;font-weight:800;border-radius:.28rem;padding:.82rem;min-height:48px}.submit:hover{background:#003f91}.result{position:sticky;top:88px;background:#081b31;color:#f4f9ff;border-color:#183b62}.result h2{color:#fff}.result-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.65rem}.metric{background:#102b49;border:1px solid #23486f;border-radius:.3rem;padding:.8rem}.metric span{display:block;color:#a9c4df;font-size:.78rem}.metric strong{display:block;font:800 1.28rem/1.25 ui-monospace,monospace;margin-top:.2rem}.status{padding:.75rem;margin-top:.8rem;border-radius:.3rem;font-weight:750}.status.pass{background:#0d513b;color:#d9fff1}.status.fail{background:#71263a;color:#ffe6ec}.status.neutral{background:#243a54;color:#dfebf7}.notice{border-left:4px solid #0b63ce;background:#eaf4ff;padding:1rem 1.1rem;margin:1.1rem 0;color:#29435f}.warning{border-left-color:#d07d00;background:#fff4df}.error{background:#ffebef;color:#761c32;padding:.8rem;border-radius:.3rem;margin-bottom:1rem;font-weight:650}.content{max-width:820px}.content h2{margin-top:2.4rem}.content h3{margin-top:1.7rem}.content table{width:100%;border-collapse:collapse;display:block;overflow-x:auto}.content th,.content td{border:1px solid #ced9e5;padding:.65rem;text-align:left}.content th{background:#eaf2fa}.formula{font-family:ui-monospace,SFMono-Regular,monospace;background:#0d2037;color:#e4f2ff;padding:1rem;border-radius:.3rem;overflow-x:auto}.source-list li{margin:.75rem 0}.source-list a{overflow-wrap:anywhere}.footer{background:#09182c;color:#adc0d5;padding:2.6rem 0;margin-top:2rem}.footer a{color:#d8edff}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:2rem}.footer p{max-width:470px}.legal{border-top:1px solid #29415e;margin-top:2rem;padding-top:1rem;font-size:.82rem;color:#8fa7c0}.mobile-menu{display:none}.badge{display:inline-block;background:#dff4ff;color:#07528f;border-radius:999px;padding:.2rem .6rem;font-size:.78rem;font-weight:750;margin-right:.35rem}@media(max-width:780px){.header-inner{align-items:flex-start}.nav{display:none}.mobile-menu{display:inline-flex;border:1px solid #b5c5d7;background:#fff;padding:.5rem .7rem;border-radius:.25rem}.nav.open{display:flex;position:absolute;left:0;right:0;top:65px;background:#fff;padding:1rem 1.25rem;border-bottom:1px solid #ccd8e5;flex-direction:column;align-items:flex-start}.lang{border-left:0;padding-left:0}.hero{padding:4rem 0 3.2rem}.grid,.grid.three,.calculator,.footer-grid{grid-template-columns:1fr}.field-grid{grid-template-columns:1fr}.device-row{grid-template-columns:1fr 1fr}.device-row .name{grid-column:1/-1}.result{position:static}.section{padding:3rem 0}}@media(max-width:420px){.wrap,.header-inner{padding-left:1rem;padding-right:1rem}.result-grid{grid-template-columns:1fr}.hero h1{font-size:2.25rem}.device-row{grid-template-columns:1fr}.device-row .name{grid-column:auto}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* Home-network guides */
.network-hero .wrap{max-width:980px}.network-hero p{max-width:760px}.lede{font-size:1.12rem;color:#40526a;max-width:820px}.guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin-top:2rem}.card-link{display:block;text-decoration:none;color:inherit;transition:transform .16s ease,border-color .16s ease,box-shadow .16s ease}.card-link:hover{color:inherit;transform:translateY(-2px);border-color:#71a6dc;box-shadow:0 10px 30px rgba(12,42,75,.09)}.card-link .num{display:block;color:#0b63ce;font:800 .78rem/1 ui-monospace,monospace;letter-spacing:.1em;margin-bottom:.8rem}.alt{background:#eef4fa}.topology{display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr) auto minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:.8rem;margin:2rem 0}.topology>span{color:#0b63ce;font-size:1.35rem;font-weight:800}.topo-node{position:relative;background:#fff;border:1px solid #bed0e3;border-top:4px solid #0b63ce;border-radius:.55rem;padding:1.2rem;box-shadow:0 6px 20px rgba(10,37,64,.06)}.topo-node:after{display:none}.topo-node small{display:block;color:#5b6c82;margin-top:.3rem}.topo-branches{display:grid;gap:.35rem;margin-top:.7rem}.topo-branches b{display:block;padding:.35rem .5rem;background:#f1f6fb;border-radius:.3rem;font-size:.88rem}.network-guide{max-width:880px}.network-guide h2{margin-top:2.8rem;padding-top:.35rem;border-top:1px solid #dce5ef}.network-guide h2:first-child{margin-top:0;border-top:0}.network-guide h3{margin-top:1.8rem}.network-guide li{margin:.45rem 0}.network-guide code{background:#eaf1f8;border:1px solid #d3dfeb;padding:.08rem .3rem;border-radius:.22rem;color:#173753}.table-wrap{overflow-x:auto;margin:1.4rem 0}.table-wrap table{width:100%;border-collapse:collapse;background:#fff;font-size:.94rem}.table-wrap th,.table-wrap td{text-align:left;padding:.8rem .9rem;border:1px solid #d8e3ee;vertical-align:top}.table-wrap th{background:#eaf2fa;color:#183551}.callout{margin:1.6rem 0;padding:1rem 1.15rem;border-left:4px solid #0b63ce;background:#edf5ff;border-radius:0 .4rem .4rem 0}.callout strong{display:block;margin-bottom:.25rem}.checklist ul{list-style:none;padding:0}.checklist li{position:relative;padding-left:1.7rem}.checklist li:before{content:'□';position:absolute;left:0;color:#0b63ce;font-weight:800}@media(max-width:900px){.guide-grid{grid-template-columns:repeat(2,minmax(0,1fr));}.topology{grid-template-columns:1fr;gap:.65rem}.topology>span{transform:rotate(90deg);text-align:center;height:1.2rem}}@media(max-width:560px){.guide-grid{grid-template-columns:1fr}.network-guide{font-size:.98rem}.table-wrap table{min-width:620px}}
.step-nav{display:flex;justify-content:space-between;gap:1rem;align-items:center;margin:2rem 0;padding:1rem;border-block:1px solid #d8e3ee}.provenance{margin-top:2rem;padding:1.25rem;background:#eef4fa;border-radius:.45rem}.planning-form,.report{margin:1rem 0}.report{overflow-wrap:anywhere}.examples{display:grid;gap:1.25rem}.scenario{background:#fff;border:1px solid #d7e1ed;border-radius:.45rem;padding:1.4rem}.scenario dt{font-weight:800;margin-top:.8rem}.scenario dd{margin-left:0}.glossary dt{font-size:1.15rem;font-weight:800;color:#0759c7;margin-top:1.4rem}.glossary dd{margin-left:0}.search-form input,textarea{width:100%;border:1px solid #9db0c6;border-radius:.28rem;padding:.66rem;background:#fff;color:#142033}textarea{font:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid #70bfff;outline-offset:2px}pre{white-space:pre-wrap;overflow-wrap:anywhere;background:#0d2037;color:#e4f2ff;padding:1rem}.actions .submit{width:auto;flex:1}.scenario .topology{grid-template-columns:1fr}.scenario .topo-node{overflow-wrap:anywhere}@media(max-width:560px){.step-nav{align-items:stretch;flex-direction:column}.table-wrap{max-width:100%}.planning-form,.report,.scenario{padding:1rem}.planning-form .actions{flex-direction:column}.planning-form .actions .submit,.planning-form .actions .btn{width:100%;flex:none}.nav{max-height:calc(100vh - 65px);overflow:auto}}@media print{.site-header,.topbar,.footer,.no-print,.mobile-menu,.search-form{display:none!important}body{background:#fff;color:#000}.section{padding:1rem 0}.panel,.scenario{border:1px solid #777;box-shadow:none;break-inside:avoid}.report{display:block}.table-wrap table{min-width:0}.wrap{max-width:none}}

/* Beginner-friendly planner */
.planner-primer{margin:1rem 0;border-left:4px solid #0b63ce;background:#f7fbff}.planner-primer h2{margin-top:0}.planner-primer ol{margin-bottom:0}.planning-form>h2{margin:2.2rem 0 .25rem;padding-top:1.4rem;border-top:1px solid #d8e3ee}.planning-form>h2:first-child{margin-top:0;padding-top:0;border-top:0}.section-help{margin-top:0;color:#52657d}.field-help{display:block;margin-top:.38rem;color:#52657d;font-size:.86rem;line-height:1.45}.simple-stop{margin:2rem 0 1rem;padding:1rem 1.1rem;background:#edf7ee;border-left:4px solid #27833f}.advanced-settings{margin:1rem 0 1.5rem;border:1px solid #cbd8e6;border-radius:.4rem;background:#f8fafc}.advanced-settings summary{cursor:pointer;padding:1rem 1.1rem;font-weight:800;color:#163a60}.advanced-settings[open] summary{border-bottom:1px solid #d8e3ee}.advanced-settings .field-grid{padding:1rem 1.1rem 1.2rem}@media(max-width:560px){.planner-primer{padding:1rem}.advanced-settings .field-grid{padding:.8rem}.planning-form>h2{font-size:1.25rem}}

/* CCTV + NAS calculator */
.visually-hidden{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}.file-button{background:#fff;border-color:#9db0c6;color:#173753}.calculator .actions{margin-top:1rem}.calculator .actions>.submit{min-width:12rem}@media(max-width:390px){.calculator .panel{padding:1rem}.calculator .actions{flex-direction:column}.calculator .actions>*{width:100%;flex:none}.calculator .field-grid{gap:.7rem}.metric strong{font-size:1.08rem;overflow-wrap:anywhere}}

/* Goal-based home entry points */
.quick-start{padding:3.25rem 0;background:#fff;border-bottom:1px solid #dce5ef}.quick-start h2{margin:0;font-size:clamp(1.75rem,3vw,2.35rem);letter-spacing:-.035em}.quick-start .lede{margin:.5rem 0 0}.quick-start-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1rem;margin-top:1.65rem}.quick-start-card{display:flex;flex-direction:column;min-height:230px;padding:1.35rem;background:#f8fbff;border:1px solid #c8d8e9;border-radius:.55rem}.quick-start-card:first-child{background:#edf6ff;border-color:#79aee2}.quick-start-card h3{margin:.55rem 0 .5rem;font-size:1.15rem;line-height:1.35}.quick-start-card p{margin:0 0 1rem;color:#52657d;font-size:.94rem}.quick-start-card>a{margin-top:auto;font-weight:800}.quick-start-card strong{color:#0759c7}.quick-start-links{display:flex;flex-wrap:wrap;gap:.45rem;margin-top:auto}.quick-start-links a{display:inline-flex;align-items:center;min-height:2.35rem;padding:.42rem .65rem;border:1px solid #9db9d6;border-radius:.32rem;background:#fff;font-size:.88rem;font-weight:750;text-decoration:none}.quick-start-links a:hover{border-color:#0759c7;background:#edf6ff}.quick-start-kicker{color:#0b63ce;font:800 .75rem/1.3 ui-monospace,monospace;letter-spacing:.055em;text-transform:uppercase}.quick-start-privacy{margin:1.1rem 0 0;padding:.85rem 1rem;background:#eef8f2;border-left:4px solid #27833f;color:#294a37;font-size:.92rem}@media(max-width:900px){.quick-start-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.quick-start-card{min-height:205px}}@media(max-width:560px){.quick-start{padding:2.5rem 0}.quick-start-grid{grid-template-columns:1fr;gap:.75rem}.quick-start-card{min-height:0;padding:1.15rem}.quick-start-card p{margin-bottom:.75rem}.quick-start-privacy{font-size:.88rem}}

/* Wi-Fi room survey */
.file-button:has(+.visually-hidden:focus-visible){outline:3px solid #0759c7;outline-offset:3px}.table-scroll{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}.table-scroll table{min-width:980px}.btn.compact{min-height:2.25rem;padding:.35rem .65rem;white-space:nowrap}.status.good{background:#e7f7ee;color:#17613a}.status.fair{background:#fff3d6;color:#7a5100}.status.poor{background:#fde8e7;color:#8b2520}[data-wifi-survey]>.panel{margin-top:1rem}@media(max-width:390px){[data-wifi-survey]>.panel{padding:1rem}[data-wifi-survey] .actions{flex-direction:column}[data-wifi-survey] .actions>*{width:100%;flex:none}.table-scroll{margin-inline:-1rem;padding-inline:1rem}}

/* VLAN/IP address planner */
[data-vlan-planner]>.panel{margin-top:1rem}[data-vlan-planner] .table-scroll table{min-width:900px}@media(max-width:390px){[data-vlan-planner]>.panel{padding:1rem}[data-vlan-planner] .actions{flex-direction:column}[data-vlan-planner] .actions>*{width:100%}}@media print{[data-vlan-planner] form,[data-vlan-planner] .btn{display:none!important}[data-vlan-planner]>.panel{box-shadow:none;border:1px solid #aaa;break-inside:avoid}[data-vlan-planner] .table-scroll{overflow:visible}[data-vlan-planner] .table-scroll table{min-width:0;font-size:10pt}}

/* NAS backup and transfer-time calculator */
[data-nas-transfer]>.panel{margin-top:1rem}[data-nas-transfer] [aria-invalid=true]{border-color:#b42318;background:#fff5f4}[data-nas-transfer] [data-result] .metric strong{color:#f4f9ff}@media(max-width:390px){body:has([data-nas-transfer]) .page-head h1{font-size:2rem}[data-nas-transfer]>.panel{padding:1rem}[data-nas-transfer] .actions{flex-direction:column}[data-nas-transfer] .actions>*{width:100%;flex:none}}@media print{[data-nas-transfer] form,[data-nas-transfer] .planner-primer{display:none!important}[data-nas-transfer]>.panel{box-shadow:none;border:1px solid #aaa;break-inside:avoid}}

/* Incident diagnosis log and report */
[data-incident-record]>.wrap>.panel{margin-top:1rem}.incident-form>h2{margin:2rem 0 .75rem;padding-top:1.25rem;border-top:1px solid #d8e3ee}.incident-form>h2:first-child{margin-top:0;padding-top:0;border-top:0}.incident-wide{grid-column:1/-1}.incident-form textarea{width:100%;resize:vertical}.incident-report h2{margin-top:0}.incident-report h3{margin-top:1.4rem}.incident-files .actions{margin-top:1rem}@media(max-width:390px){body:has([data-incident-record]) .page-head h1{font-size:2rem}[data-incident-record] .panel{padding:1rem}[data-incident-record] .planner-primer ol{padding-left:1.45rem}[data-incident-record] .actions{flex-direction:column}[data-incident-record] .actions>*{width:100%;flex:none;text-align:center}}@media print{body:has([data-incident-record]) .site-header,body:has([data-incident-record]) .topbar,body:has([data-incident-record]) .footer,body:has([data-incident-record]) .page-head,[data-incident-record] .planner-primer,[data-incident-record] .notice.warning,[data-incident-record] form,[data-incident-record] #troubleshooter-result,[data-incident-record] .incident-files{display:none!important}[data-incident-record]>.wrap{max-width:none}[data-incident-record] .incident-report{box-shadow:none;border:0;padding:0}[data-incident-record] .incident-report .notice.warning{display:block!important;border:1px solid #777}}