/* OTK Technologies: site styles */

/* fonts (self-hosted, latin subset; variable where available) */
@font-face{font-family:"Archivo";src:url(/fonts/archivo-latin-var.woff2) format("woff2");font-weight:100 900;font-stretch:62% 125%;font-display:swap}
@font-face{font-family:"IBM Plex Sans";src:url(/fonts/plex-sans-latin-var.woff2) format("woff2");font-weight:100 700;font-stretch:85% 100%;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url(/fonts/plex-mono-400-latin.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url(/fonts/plex-mono-500-latin.woff2) format("woff2");font-weight:500;font-display:swap}

:root{
  --bg:#F3F4F1; --surface:#FFFFFF; --ink:#0E1726; --muted:#525C6B; --line:#D6DADF;
  --accent:#2F6BFF; --accent-ink:#FFFFFF; --accent-soft:#E6EDFF;
  /* accent for small text: #2F6BFF is under 4.5:1 on --bg, so text uses a deeper step */
  --accent-text:#2558D6;
  /* #2F6BFF under white 15px button text is 4.49:1; this imperceptibly deeper blue passes 4.5:1 */
  --accent-btn:#2D69FC;
  /* form control borders need 3:1 against the surface */
  --field-line:#8A93A0;
  --error:#B42318; --success:#1E7B45;
  --rack:#0E1726; --rack-unit:#1C283C; --rack-unit-2:#243350; --rack-text:#C9D3E1; --rack-dim:#7C8AA0;
  --display:"Archivo","Helvetica Neue",Arial,sans-serif;
  --body:"IBM Plex Sans","Helvetica Neue",Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
  --header-h:69px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --bg:#0B111C; --surface:#121A28; --ink:#E6EBF2; --muted:#9AA6B6; --line:#243044;
    --accent:#6E9BFF; --accent-ink:#0B111C; --accent-soft:#17233D; --accent-text:#6E9BFF; --accent-btn:#6E9BFF;
    --field-line:#7A8594; --error:#FF8A80; --success:#6FD39B;
    --rack:#060A12; --rack-unit:#18233A; --rack-unit-2:#203050;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#0B111C; --surface:#121A28; --ink:#E6EBF2; --muted:#9AA6B6; --line:#243044;
  --accent:#6E9BFF; --accent-ink:#0B111C; --accent-soft:#17233D; --accent-text:#6E9BFF; --accent-btn:#6E9BFF;
  --field-line:#7A8594; --error:#FF8A80; --success:#6FD39B;
  --rack:#060A12; --rack-unit:#18233A; --rack-unit-2:#203050;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
@media (prefers-reduced-motion: no-preference){html{scroll-behavior:smooth}}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 var(--body);padding-inline:20px}
[id]{scroll-margin-top:calc(var(--header-h) + 16px)}
.wrap{max-width:1160px;margin:0 auto}
a{color:var(--accent-text)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.checks input:focus-visible{outline-offset:2px}
h1,h2,h3{font-family:var(--display);font-stretch:125%;line-height:1.08;margin:0;text-wrap:balance;letter-spacing:-0.01em}
p{margin:0}
.eyebrow{font:500 12px/1.4 var(--mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.eyebrow.accent{color:var(--accent-text)}
.btn{display:inline-flex;align-items:center;gap:8px;min-height:46px;padding:0 20px;border-radius:6px;font:600 15px/1 var(--body);text-decoration:none;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--accent-btn);color:var(--accent-ink)}
.btn-primary:hover{filter:brightness(1.08)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:transparent}
.btn-ghost:hover{border-color:var(--ink)}
.btn[disabled]{cursor:progress;opacity:.7}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* skip link */
.skip{position:absolute;left:12px;top:-100px;z-index:100;background:var(--accent-btn);color:var(--accent-ink);padding:10px 14px;border-radius:6px;font-weight:600;text-decoration:none}
.skip:focus{top:12px}

/* header */
header.site{position:sticky;top:env(safe-area-inset-top,0px);z-index:10;background:var(--bg);border-bottom:1px solid var(--line);margin-inline:-20px;padding-inline:20px}
header.site .wrap{display:flex;align-items:center;gap:24px;min-height:68px}
.brand{display:flex;align-items:center;color:var(--ink);text-decoration:none}
.brand svg{height:34px;width:auto;aspect-ratio:300/135}
nav.primary{display:flex;gap:24px;margin-left:auto}
nav.primary a{color:var(--muted);text-decoration:none;font-size:15px;font-weight:500}
nav.primary a:hover{color:var(--ink)}
@media (max-width:820px){nav.primary{display:none} header.site .btn{margin-left:auto}}

/* hero */
.hero{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:56px;align-items:center;padding-block:72px 80px}
.hero h1{font-size:clamp(38px,5.4vw,66px);font-weight:800;margin-top:18px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero .lede{font-size:19px;color:var(--muted);max-width:34em;margin-top:22px}
.hero .ctas{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.partner-line{display:flex;align-items:center;gap:12px;margin-top:36px;font-size:14px;color:var(--muted)}
.partner-line strong{color:var(--ink);font-weight:600}
.partner-line .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex:none}
@media (max-width:900px){.hero{grid-template-columns:minmax(0,1fr);gap:40px;padding-block:48px 56px}}
@media (max-width:420px){.hero h1{font-size:34px}.hero .lede{font-size:17px}}

/* power path diagram */
.sld-fig{margin:0;display:flex;flex-direction:column;gap:12px;align-items:center;min-width:0}
.sld{width:100%;max-width:460px;height:auto;display:block}
.sld .box{fill:var(--surface);stroke:var(--ink);stroke-width:1.5}
.sld .zone{fill:none;stroke:var(--muted);stroke-width:1.2;stroke-dasharray:5 4}
.sld .cage{fill:var(--accent-soft);stroke:var(--accent);stroke-width:1.5}
.sld .rackbox{fill:var(--rack);stroke:none}
.sld .unit{fill:var(--rack-unit-2)}
.sld .pdu{fill:#F2B33D}
.sld .wire{stroke:#E0A030;stroke-width:3;fill:none;stroke-linecap:round}
.sld .wire.b{stroke:#B7791F}
.sld .t1{font:600 11px var(--mono);letter-spacing:.08em;fill:var(--ink)}
.sld .t2{font:400 10px var(--mono);fill:var(--muted)}
.sld .t3{font:600 10px var(--mono);letter-spacing:.1em;fill:var(--muted)}
.sld .t4{font:600 10px var(--mono);letter-spacing:.1em;fill:var(--accent-text)}
.sld .flow{stroke-dasharray:4 10}
.sld-cap{font:400 12px/1.5 var(--mono);color:var(--muted);text-align:center}

/* sections */
section.block{padding-block:88px;border-top:1px solid var(--line)}
.sec-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:40px;align-items:end;margin-bottom:48px}
.sec-head h2{font-size:clamp(30px,3.6vw,44px);font-weight:700;margin-top:12px}
.sec-head p{color:var(--muted);font-size:17px;max-width:34em}
@media (max-width:820px){.sec-head{grid-template-columns:minmax(0,1fr);gap:16px}}
@media (max-width:560px){section.block{padding-block:64px}.sec-head{margin-bottom:32px}.sec-head h2{font-size:28px}}

/* services */
.layers{display:flex;flex-direction:column;gap:0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--surface)}
.layer{display:grid;grid-template-columns:220px minmax(0,1fr);border-top:1px solid var(--line)}
.layer:first-child{border-top:0}
.layer-name{padding:28px 24px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:8px}
.layer-name h3{font-size:20px;font-weight:700}
.layer-name .eyebrow{color:var(--accent-text)}
.layer-items{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}
.svc{padding:28px 24px;display:flex;flex-direction:column;gap:10px;border-left:1px solid var(--line)}
.svc:first-child{border-left:0}
.svc h4{margin:0;font:600 17px/1.3 var(--body)}
.svc p{color:var(--muted);font-size:15px}
.spec{font:400 12px/1.6 var(--mono);color:var(--muted);margin-top:auto;padding-top:10px;border-top:1px dashed var(--line)}
@media (max-width:980px){
  .layer{grid-template-columns:minmax(0,1fr)}
  .layer-name{border-right:0;border-bottom:1px solid var(--line);padding-bottom:20px}
}
@media (max-width:720px){
  .layer-items{grid-template-columns:minmax(0,1fr)}
  .svc{border-left:0;border-top:1px solid var(--line)}
  .svc:first-child{border-top:0}
}
@media (max-width:420px){.layer-name,.svc{padding:22px 18px}}

/* generator brands */
.brand-block{margin-top:20px;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:40px;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:32px}
.brand-block h3{font-size:24px;font-weight:700;margin-top:10px}
.brand-block .intro{color:var(--muted);font-size:15px;margin-top:12px;max-width:40em}
.brand-block ul{margin:20px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:10px}
.brand-block li{display:flex;gap:12px;align-items:baseline;font-size:15px}
.brand-block li::before{content:"";width:7px;height:7px;flex:none;border-radius:1px;background:#F2B33D;transform:translateY(-1px)}
.ratings caption{text-align:left;font:500 12px/1.4 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);padding-bottom:10px}
.ratings th,.ratings td{padding:12px 0;font-size:15px}
.ratings thead th{padding-top:0}
.ratings td{font:500 14px/1.5 var(--mono)}
.ratings td:last-child,.ratings th:last-child{text-align:right}
.ratings-note{margin-top:12px;font-size:13px;color:var(--muted)}
@media (max-width:900px){.brand-block{grid-template-columns:minmax(0,1fr);gap:28px}}
@media (max-width:560px){.brand-block{padding:22px}}

/* process */
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0;counter-reset:step}
.steps li{counter-increment:step;padding:0 20px 0 0;display:flex;flex-direction:column;gap:10px;position:relative}
.steps li::before{content:counter(step,decimal-leading-zero);font:500 13px/1 var(--mono);color:var(--accent-text);padding-bottom:14px;border-bottom:2px solid var(--line);margin-bottom:8px}
.steps li:first-child::before{border-bottom-color:var(--accent)}
.steps h3{font-size:19px;font-weight:700}
.steps p{color:var(--muted);font-size:15px}
.steps .out{font:400 12px/1.5 var(--mono);color:var(--ink);background:var(--accent-soft);padding:6px 8px;border-radius:4px;align-self:flex-start}
@media (max-width:980px){.steps{grid-template-columns:repeat(2,minmax(0,1fr));row-gap:40px}}
@media (max-width:560px){.steps{grid-template-columns:minmax(0,1fr)}.steps li{padding-right:0}}

/* customers */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:32px;display:flex;flex-direction:column;gap:16px}
.panel.otk{border-color:var(--accent)}
.panel h3{font-size:22px;font-weight:700}
.panel ul{margin:0;padding:0;list-style:none;display:flex;flex-direction:column;gap:10px}
.panel li{display:flex;gap:12px;align-items:baseline;font-size:15px}
.panel li::before{content:"";width:7px;height:7px;flex:none;border-radius:1px;background:var(--line);transform:translateY(-1px)}
.panel.otk li::before{background:var(--accent)}
.handoff{grid-column:1 / -1;display:flex;flex-wrap:wrap;align-items:center;gap:12px 24px;padding:20px 24px;border:1px dashed var(--line);border-radius:10px;color:var(--muted);font-size:15px}
.handoff strong{color:var(--ink);font-weight:600}
.split.three{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width:980px){.split.three{grid-template-columns:minmax(0,1fr)}}
@media (max-width:820px){.split{grid-template-columns:minmax(0,1fr)}}
@media (max-width:420px){.panel{padding:24px}}

/* maintenance table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:10px;background:var(--surface)}
table{width:100%;border-collapse:collapse}
.table-wrap table{min-width:640px}
th,td{text-align:left;padding:16px 20px;border-top:1px solid var(--line);vertical-align:top;font-size:15px}
thead th{border-top:0;font:500 12px/1.4 var(--mono);letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
td.freq{font:500 13px/1.5 var(--mono);white-space:nowrap}
td.what{color:var(--muted)}
.tag{display:inline-block;white-space:nowrap;font:500 11px/1 var(--mono);padding:5px 7px;border-radius:4px;background:var(--accent-soft);color:var(--ink);letter-spacing:.04em}
.table-note{margin-top:14px;font-size:14px;color:var(--muted)}
/* phones: each row becomes a card so nothing scrolls sideways */
@media (max-width:640px){
  .table-wrap{overflow:visible}
  .table-wrap table{min-width:0}
  .table-wrap thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
  .table-wrap tbody tr{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:6px 12px;padding:18px 18px;border-top:1px solid var(--line)}
  .table-wrap tbody tr:first-child{border-top:0}
  .table-wrap tbody td{display:block;padding:0;border:0}
  .table-wrap tbody td:first-child{font-weight:600;grid-column:1}
  .table-wrap tbody td.what{grid-column:1 / -1;grid-row:2}
  .table-wrap tbody td.freq{grid-column:1;grid-row:3;font-size:12px}
  .table-wrap tbody td.freq::before{content:"Frequency: ";color:var(--muted);font-weight:400}
  .table-wrap tbody td:last-child{grid-column:2;grid-row:1;justify-self:end}
}

/* contact */
.contact{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:56px}
.contact h2{font-size:clamp(30px,3.6vw,44px);font-weight:700;margin-top:12px}
.contact .lede{color:var(--muted);font-size:17px;margin-top:16px;max-width:30em}
form.enquiry{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:32px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field.full{grid-column:1 / -1}
fieldset.field{border:0;padding:0;margin:0}
fieldset.field legend{font-size:14px;font-weight:500;margin-bottom:6px;padding:0}
label{font-size:14px;font-weight:500}
.req{color:var(--muted);font-weight:400}
input,select,textarea{font:16px/1.4 var(--body);color:var(--ink);background:var(--bg);border:1px solid var(--field-line);border-radius:6px;padding:11px 12px;min-height:46px;width:100%}
input::placeholder,textarea::placeholder{color:var(--muted);opacity:1}
textarea{min-height:110px;resize:vertical}
[aria-invalid="true"]{border-color:var(--error);box-shadow:0 0 0 1px var(--error)}
.err{font-size:13px;color:var(--error);min-height:0}
.err:empty{display:none}
.checks{display:flex;flex-wrap:wrap;gap:8px}
.checks label{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--field-line);border-radius:6px;padding:0 12px;min-height:44px;font-weight:400;cursor:pointer;background:var(--bg)}
.checks input{width:16px;height:16px;min-height:0;accent-color:var(--accent)}
.checks label:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}
.checks label:has(input:focus-visible){outline:2px solid var(--accent);outline-offset:2px}
.hp{position:absolute!important;left:-10000px;width:1px;height:1px;overflow:hidden}
.form-foot{grid-column:1 / -1;display:flex;flex-wrap:wrap;gap:12px 20px;align-items:center}
.form-note{grid-column:1 / -1;font-size:13px;color:var(--muted)}
.status{font-size:14px;color:var(--muted)}
.status.ok{color:var(--success)}
.status.bad{color:var(--error)}
.sent{grid-column:1 / -1;display:flex;flex-direction:column;gap:10px;padding:8px 0}
.sent h3{font-size:22px;font-weight:700}
.sent p{color:var(--muted)}
@media (max-width:900px){.contact{grid-template-columns:minmax(0,1fr);gap:40px}}
@media (max-width:560px){form.enquiry{grid-template-columns:minmax(0,1fr);padding:22px}}
footer.site{border-top:1px solid var(--line);padding-block:32px 40px;font-size:13px;color:var(--muted)}
footer.site .wrap{display:flex;flex-wrap:wrap;gap:12px 32px;justify-content:space-between;align-items:center}
footer.site svg{height:26px;width:auto;aspect-ratio:300/135;color:var(--ink)}
footer.site a{color:var(--muted)}
footer.site a:hover{color:var(--ink)}
footer.site .legal{display:flex;flex-wrap:wrap;gap:6px 20px}

/* long-form pages (privacy, 404) */
.prose{max-width:720px;padding-block:64px 88px}
.prose h1{font-size:clamp(32px,4.4vw,48px);font-weight:800;margin:12px 0 12px}
.prose .updated{font:400 13px/1.5 var(--mono);color:var(--muted);margin-bottom:40px}
.prose h2{font-size:22px;font-weight:700;margin:40px 0 12px}
.prose p,.prose li{color:var(--ink);font-size:16px}
.prose p+p{margin-top:12px}
.prose ul{padding-left:20px;margin:12px 0}
.prose li+li{margin-top:6px}
.prose .muted{color:var(--muted)}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}
@media print{
  header.site,.skip,form.enquiry{display:none}
  body{background:#fff;color:#000}
}