/* NASBackup.in — one stylesheet for the whole site.
   Layout: left-aligned 1160px column; ruled rows, one loud object per page (the NAS drawing). */
@font-face{font-family:"Sora";font-weight:300;font-style:normal;font-display:swap;src:url(fonts/sora-300.woff2) format("woff2")}
@font-face{font-family:"Sora";font-weight:600;font-style:normal;font-display:swap;src:url(fonts/sora-600.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:400;font-style:normal;font-display:swap;src:url(fonts/plex-400.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:500;font-style:normal;font-display:swap;src:url(fonts/plex-500.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-weight:600;font-style:normal;font-display:swap;src:url(fonts/plex-600.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:400;font-style:normal;font-display:swap;src:url(fonts/mono-400.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:500;font-style:normal;font-display:swap;src:url(fonts/mono-500.woff2) format("woff2")}

:root{
  --bg:#F5F8FB;--panel:#FFFFFF;--ink:#0E2238;--muted:#55677A;--line:#D6DFE8;
  --navy:#002442;--blue:#0F6FD1;--blue-strong:#1488EC;--on-blue:#FFFFFF;--tint:#E8F1FB;
  --led:#12B76A;--chassis:#0B1F33;--tray:#16324E;--tray-on:#1F4A73;--tray-ink:#9DB6CE;--error:#B42318;
  --display:"Sora","Avenir Next","Segoe UI",sans-serif;
  --body:"IBM Plex Sans","Segoe UI",Roboto,Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){--bg:#06131F;--panel:#0C2033;--ink:#E4EDF6;--muted:#9AB0C4;--line:#1E3A54;--navy:#E4EDF6;--blue:#5DB1FF;
    --tint:#0F2A44;--led:#2ED58A;--chassis:#030B13;--tray:#0F2740;--tray-on:#1B4268;--tray-ink:#8FA9C2;--error:#FF8A7A;color-scheme:dark}
}
:root[data-theme="dark"]{--bg:#06131F;--panel:#0C2033;--ink:#E4EDF6;--muted:#9AB0C4;--line:#1E3A54;--navy:#E4EDF6;--blue:#5DB1FF;
    --tint:#0F2A44;--led:#2ED58A;--chassis:#030B13;--tray:#0F2740;--tray-on:#1B4268;--tray-ink:#8FA9C2;--error:#FF8A7A;color-scheme:dark}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.6}
img,svg{max-width:100%}
a{color:var(--blue)}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
h1,h2,h3{font-family:var(--display);color:var(--navy);text-wrap:balance}
h1{font-weight:300;font-size:clamp(2rem,1.3rem + 3vw,3.2rem);line-height:1.06;letter-spacing:-.033em}
h2{font-weight:300;font-size:clamp(1.55rem,1.2rem + 1.5vw,2.2rem);line-height:1.14;letter-spacing:-.025em}
h3{font-weight:600;font-size:1.05rem;line-height:1.3}
:focus-visible{outline:3px solid var(--blue-strong);outline-offset:2px;border-radius:4px}
[hidden]{display:none!important}
.wrap{max-width:1160px;margin-inline:auto;padding-inline:20px}
.band{padding-block:clamp(40px,6vw,76px)}
.band+.band{border-top:1px solid var(--line)}
.lede{max-width:44rem;margin-top:16px;font-size:1.08rem;color:var(--muted)}
.intro{max-width:42rem;margin-top:12px;color:var(--muted)}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.hp{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border:1px solid transparent;border-radius:6px;font:600 1rem var(--body);text-decoration:none;cursor:pointer}
.btn-primary{background:var(--blue-strong);color:var(--on-blue)}
.btn-primary:hover{filter:brightness(1.08)}
.btn-ghost{background:transparent;color:var(--navy);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--blue)}
.btn-small{min-height:38px;padding:0 14px;font-size:.92rem;white-space:nowrap}
.btn[disabled]{opacity:.6;cursor:default}

/* header */
.top{position:sticky;top:0;z-index:20;background:var(--bg);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:18px;min-height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;margin-right:auto}
.brand svg{width:30px;height:30px;flex:none}
.brand b{font-family:var(--display);font-weight:600;font-size:1.2rem;letter-spacing:-.02em;color:var(--navy)}
.brand b span{color:var(--blue)}
.nav{display:flex;align-items:center;gap:20px}
.nav a{font-size:.95rem;font-weight:500;color:var(--ink);text-decoration:none;white-space:nowrap}
.nav a:hover,.nav a[aria-current]{color:var(--blue)}
.top-phone{font-family:var(--mono);font-size:.92rem;color:var(--navy);text-decoration:none;white-space:nowrap}
.menu{display:none}
.menu summary{list-style:none;cursor:pointer;min-height:38px;padding:0 12px;border:1px solid var(--line);border-radius:6px;display:flex;align-items:center;font-weight:600;font-size:.92rem}
.menu summary::-webkit-details-marker{display:none}
.menu nav{position:absolute;left:0;right:0;top:100%;background:var(--panel);border-bottom:1px solid var(--line);padding:8px 20px 16px;display:grid}
.menu nav a{padding:12px 0;border-top:1px solid var(--line);text-decoration:none;color:var(--ink);font-weight:500}

/* breadcrumbs */
.crumbs{padding-top:22px;font-size:.86rem;color:var(--muted)}
.crumbs ol{display:flex;flex-wrap:wrap;gap:6px}
.crumbs li+li::before{content:"/";margin-right:6px;color:var(--line)}
.crumbs a{color:var(--muted)}

/* hero */
.hero{padding-block:clamp(32px,5vw,64px)}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,.92fr);gap:clamp(28px,5vw,64px);align-items:start}
.hero .sub{margin-top:20px;max-width:34rem;font-size:1.1rem;color:var(--muted)}
.points{margin-top:22px;display:grid;gap:10px}
.points li{position:relative;padding-left:26px}
.points li::before{content:"";position:absolute;left:4px;top:.55em;width:9px;height:9px;background:var(--blue-strong);transform:rotate(45deg)}
.rule321{margin-top:32px;padding-top:22px;border-top:1px solid var(--line)}
.rule321 ol{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.rule321 li{display:flex;flex-direction:column;gap:2px;min-width:0}
.rule321 .n{font-family:var(--display);font-weight:300;font-size:clamp(2.6rem,2rem + 3vw,4rem);line-height:1;letter-spacing:-.04em;color:var(--blue)}
.rule321 .t{font-size:.95rem;line-height:1.35}
.rule321 p{margin-top:14px;font-size:.88rem;color:var(--muted)}

/* lead form */
.form-card{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:clamp(18px,3vw,28px);scroll-margin-top:88px}
.form-card h2,.form-card .ft{font-family:var(--display);font-weight:600;font-size:1.3rem;letter-spacing:-.015em;line-height:1.25;color:var(--navy)}
.form-card>p,.form-card .fs{margin-top:6px;color:var(--muted);font-size:.95rem}
form.lead{margin-top:16px;display:grid;gap:13px}
.row2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}
.field{display:grid;gap:5px;min-width:0}
label{font-size:.86rem;font-weight:500}
label i{font-style:normal;font-weight:400;color:var(--muted)}
input,select,textarea{width:100%;min-height:46px;padding:10px 12px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--ink);font:400 1rem var(--body)}
textarea{min-height:80px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:3px solid var(--blue-strong);outline-offset:0;border-color:var(--blue-strong)}
.field.bad input{border-color:var(--error)}
.err{font-size:.84rem;color:var(--error)}
.fine{font-size:.82rem;color:var(--muted)}
.done h3{font-size:1.2rem}
.done p{margin-top:8px;color:var(--muted)}
.done .btn{margin-top:14px}

/* rows, cards, lists */
.cols3{margin-top:32px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line)}
.cols3>*{padding:22px 22px 22px 0;min-width:0}
.cols3>*+*{padding-left:22px;border-left:1px solid var(--line)}
.cols3 p{margin-top:8px;color:var(--muted);font-size:.96rem}
.note{margin-top:26px;padding:16px 18px;background:var(--tint);border-radius:8px;max-width:46rem}
.note b{color:var(--navy)}
.rows{margin-top:30px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:clamp(24px,5vw,64px)}
.rows>li{display:grid;grid-template-columns:72px minmax(0,1fr);gap:14px;padding:20px 0;border-top:1px solid var(--line)}
.rows .tag{font-family:var(--mono);font-size:.78rem;color:var(--blue);padding-top:3px}
.rows p{margin-top:6px;color:var(--muted);font-size:.96rem}
.rows h3 a{color:inherit;text-decoration:none}
.rows h3 a:hover{color:var(--blue)}
.tiles{margin-top:30px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.tile{display:block;padding:22px;background:var(--panel);border:1px solid var(--line);border-radius:10px;text-decoration:none;color:var(--ink)}
.tile:hover{border-color:var(--blue)}
.tile h3{font-size:1.25rem}
.tile p{margin-top:8px;color:var(--muted);font-size:.95rem}
.tile .count{margin-top:14px;font-family:var(--mono);font-size:.82rem;color:var(--blue)}
.chips{margin-top:22px;display:flex;flex-wrap:wrap;gap:8px}
.chips a,.chips button{display:inline-flex;align-items:center;min-height:38px;padding:0 14px;border:1px solid var(--line);border-radius:6px;background:var(--panel);color:var(--ink);font:500 .92rem var(--body);text-decoration:none;cursor:pointer}
.chips a:hover,.chips button:hover{border-color:var(--blue)}
.chips [aria-pressed="true"],.chips a[aria-current]{background:var(--blue-strong);border-color:var(--blue-strong);color:var(--on-blue)}
.steps{margin-top:32px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));counter-reset:step}
.steps li{counter-increment:step;padding:20px 20px 0 0;border-top:2px solid var(--navy);min-width:0}
.steps li::before{content:"Step " counter(step);display:block;font:500 .78rem var(--mono);color:var(--blue);margin-bottom:8px}
.steps p{margin-top:8px;color:var(--muted);font-size:.95rem}

/* tables */
.scroll{margin-top:22px;overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:var(--panel)}
table{width:100%;border-collapse:collapse;font-size:.94rem}
th,td{padding:11px 14px;text-align:left;vertical-align:top;border-top:1px solid var(--line)}
thead th{border-top:0;font-size:.8rem;font-weight:600;color:var(--muted);white-space:nowrap;background:var(--panel)}
tbody th{font-weight:600}
td.num,th.num{font-family:var(--mono);font-variant-numeric:tabular-nums;white-space:nowrap}
.models td:first-child a{font-weight:600;text-decoration:none}
.models td:first-child a:hover{text-decoration:underline}
.models .q{white-space:nowrap}
.spec th{width:34%;color:var(--muted);font-weight:500}
.spec td{font-family:var(--mono);font-size:.9rem}
.count-line{margin-top:18px;font-size:.9rem;color:var(--muted)}
.group-title{margin-top:44px;font-family:var(--display);font-weight:600;font-size:1.2rem;color:var(--navy)}
.group-title+p{margin-top:6px;color:var(--muted);max-width:44rem}

/* product page */
.product{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:clamp(24px,4vw,56px);align-items:start;padding-block:26px clamp(40px,6vw,72px)}
.product aside{position:sticky;top:84px}
.kicker{font-family:var(--mono);font-size:.84rem;color:var(--blue)}
.product h1{margin-top:8px}
.product section{margin-top:44px}
.product section>h2{font-size:1.5rem}
.product section>p{margin-top:12px;max-width:44rem}
.facts{margin-top:26px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border:1px solid var(--line);border-radius:10px;background:var(--panel)}
.facts div{padding:14px 16px;min-width:0}
.facts div+div{border-left:1px solid var(--line)}
.facts dt{font-size:.78rem;color:var(--muted)}
.facts dd{margin-top:3px;font-family:var(--display);font-weight:600;font-size:1.02rem;color:var(--navy);line-height:1.3;overflow-wrap:anywhere}
.source{margin-top:12px;font-size:.84rem;color:var(--muted)}

/* NAS drawing */
.nas{margin-top:22px;background:var(--chassis);border-radius:10px;padding:14px 14px 12px;max-width:560px}
.nas.rack{max-width:none}
.bays{display:grid;grid-template-columns:repeat(var(--cols,4),minmax(0,1fr));gap:6px}
.bay{position:relative;height:84px;border-radius:4px;background:var(--tray)}
.nas.rack .bay{height:34px}
.nas.flash .bay{height:44px}
.bay::before{content:"";position:absolute;left:18%;right:18%;top:10px;height:3px;border-radius:2px;background:var(--tray-ink);opacity:.35}
.nas.rack .bay::before,.nas.flash .bay::before{display:none}
.bay::after{content:"";position:absolute;left:50%;bottom:9px;width:7px;height:7px;margin-left:-3.5px;border-radius:50%;background:var(--led);box-shadow:0 0 8px var(--led)}
.nas.rack .bay::after{left:auto;right:8px;bottom:50%;margin:0 0 -3.5px}
.bay.spare{background:var(--tray-on)}
.bay b{position:absolute;left:0;right:0;top:24px;text-align:center;font:500 .72rem var(--mono);color:var(--tray-ink)}
.nas-foot{display:flex;justify-content:space-between;gap:12px;margin-top:10px;font:400 .72rem var(--mono);color:var(--tray-ink)}

/* sizer */
.sizer{margin-top:32px;display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(24px,4vw,56px);align-items:start}
.controls{display:grid;gap:22px}
.controls fieldset{border:0;padding:0;margin:0}
.controls legend{padding:0;font-size:.86rem;font-weight:500}
.ctl-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px}
.ctl-head output{font-family:var(--mono);font-weight:500;font-size:1.05rem;color:var(--navy)}
input[type=range]{min-height:32px;padding:0;border:0;background:transparent;accent-color:var(--blue-strong)}
.seg{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.seg label{position:relative}
.seg input{position:absolute;opacity:0;width:100%;height:100%;min-height:0;margin:0;cursor:pointer}
.seg span{display:inline-flex;align-items:center;min-height:40px;padding:0 14px;border:1px solid var(--line);border-radius:6px;background:var(--panel);font-size:.92rem;font-weight:500}
.seg input:checked+span{background:var(--blue-strong);border-color:var(--blue-strong);color:var(--on-blue)}
.seg input:focus-visible+span{outline:3px solid var(--blue-strong);outline-offset:2px}
.result{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:clamp(18px,3vw,28px);min-width:0}
.need{display:flex;align-items:baseline;flex-wrap:wrap;gap:6px 12px}
.need strong{font-family:var(--display);font-weight:300;font-size:clamp(2.6rem,2rem + 3vw,3.8rem);line-height:1;letter-spacing:-.04em;color:var(--navy)}
.need span{color:var(--muted)}
.result .nas{max-width:none}
.meter{margin-top:18px}
.meter-bar{position:relative;height:12px;border-radius:6px;background:var(--tint);overflow:hidden}
.meter-bar i{position:absolute;inset:0 auto 0 0;display:block;border-radius:6px;background:var(--blue-strong)}
.meter-bar .future{opacity:.35}
.legend{margin-top:8px;display:flex;flex-wrap:wrap;gap:4px 18px;font-size:.84rem;color:var(--muted)}
.legend span::before{content:"";display:inline-block;width:9px;height:9px;border-radius:2px;margin-right:6px;background:var(--blue-strong)}
.legend .l2::before{opacity:.35}
.legend .l3::before{background:var(--tint);border:1px solid var(--line)}
.kv{margin-top:18px}
.kv div{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-top:1px solid var(--line);font-size:.95rem}
.kv dt{color:var(--muted)}
.kv dd{font-family:var(--mono);font-weight:500;text-align:right;color:var(--navy)}
.result .btn{margin-top:18px;width:100%}
.result .fine{margin-top:10px}

/* prose */
.prose{max-width:46rem}
.prose h2{margin-top:44px;font-size:1.55rem}
.prose h3{margin-top:26px}
.prose p{margin-top:14px}
.prose ul{margin-top:14px;display:grid;gap:8px}
.prose ul li{position:relative;padding-left:24px}
.prose ul li::before{content:"";position:absolute;left:4px;top:.6em;width:8px;height:8px;background:var(--blue-strong);transform:rotate(45deg)}
.article{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:clamp(24px,4vw,56px);align-items:start;padding-block:26px clamp(40px,6vw,72px)}
.article aside{position:sticky;top:84px}

/* faq */
.faq{margin-top:26px;max-width:46rem;border-bottom:1px solid var(--line)}
details.q{border-top:1px solid var(--line)}
details.q summary{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:17px 0;cursor:pointer;list-style:none;font-family:var(--display);font-weight:600;font-size:1.02rem;color:var(--navy)}
details.q summary::-webkit-details-marker{display:none}
details.q summary::after{content:"+";font:400 1.4rem var(--mono);color:var(--blue);line-height:1}
details.q[open] summary::after{content:"–"}
details.q p{padding:0 0 20px;color:var(--muted);max-width:40rem}

/* contact + footer */
.reach div{display:grid;grid-template-columns:88px minmax(0,1fr) auto;gap:12px;align-items:center;padding:14px 0;border-top:1px solid var(--line)}
.reach div:last-child{border-bottom:1px solid var(--line)}
.reach dt{font-size:.86rem;color:var(--muted)}
.reach dd{font-family:var(--display);font-size:1.05rem;color:var(--navy);overflow-wrap:anywhere}
.reach dd a{color:inherit;text-decoration:none}
.copy{min-height:34px;padding:0 12px;border:1px solid var(--line);border-radius:6px;background:var(--panel);color:var(--ink);font:500 .82rem var(--body);cursor:pointer}
.two{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,5vw,64px);align-items:start}
footer{border-top:1px solid var(--line);padding-block:44px 96px;font-size:.9rem;color:var(--muted)}
.fcols{display:grid;grid-template-columns:1.3fr repeat(4,minmax(0,1fr));gap:28px}
.fcols h4{font-family:var(--display);font-weight:600;font-size:.92rem;color:var(--navy);margin-bottom:10px}
.fcols li{margin-top:7px}
.fcols a{color:var(--muted);text-decoration:none}
.fcols a:hover{color:var(--blue)}
.legal{margin-top:34px;padding-top:20px;border-top:1px solid var(--line);font-size:.82rem}
.legal p+p{margin-top:6px}
.bar{display:none}

@media (max-width:1040px){
  .nav,.top-phone{display:none}
  .menu{display:block}
  .product,.article{grid-template-columns:minmax(0,1fr)}
  .product aside,.article aside{position:static}
  .fcols{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:860px){
  .hero .wrap,.sizer,.two{grid-template-columns:minmax(0,1fr)}
  .rows,.cols3{grid-template-columns:minmax(0,1fr)}
  .cols3>*,.cols3>*+*{padding:18px 0;border-left:0}
  .cols3>*+*{border-top:1px solid var(--line)}
  .tiles{grid-template-columns:minmax(0,1fr)}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:26px}
  .facts{grid-template-columns:repeat(2,minmax(0,1fr))}
  .facts div:nth-child(3){border-left:0}
  .facts div:nth-child(n+3){border-top:1px solid var(--line)}
  .bar{position:fixed;left:0;right:0;bottom:0;z-index:30;display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));background:var(--panel);border-top:1px solid var(--line)}
  .bar .btn{min-height:48px;padding:0 10px;font-size:.95rem}
}
@media (max-width:480px){
  .row2{grid-template-columns:minmax(0,1fr)}
  .steps{grid-template-columns:minmax(0,1fr)}
  .rows>li{grid-template-columns:minmax(0,1fr);gap:4px}
  .reach div{grid-template-columns:minmax(0,1fr) auto}
  .reach dt{grid-column:1/-1}
  .bay{height:64px}
  .fcols{grid-template-columns:minmax(0,1fr)}
}
@media (prefers-reduced-motion:no-preference){
  html{scroll-behavior:smooth}
  .bay::after{animation:led 2.6s ease-in-out infinite}
  .bay:nth-child(2n)::after{animation-delay:.5s}
  .bay:nth-child(3n)::after{animation-delay:1.1s}
  @keyframes led{0%,100%{opacity:1}50%{opacity:.45}}
}
@media print{.top,.bar,footer,aside{display:none}}
@media (max-width:430px){
  .top .wrap{gap:10px}
  .brand{gap:8px}
  .brand svg{width:26px;height:26px}
  .brand b{font-size:1.05rem}
  .top .btn-small{padding:0 11px;font-size:.86rem}
  .menu summary{padding:0 10px}
}
@media (max-width:359px){.top .btn-small{display:none}}
.preview-note{padding:9px 20px;background:var(--tint);border-bottom:1px solid var(--line);font-size:.86rem;color:var(--ink);text-align:center}