/* Broadband for Schools — site styles. No framework.
   Palette: oxblood (school blazer) + mustard on warm paper, with the T568B cable colours as a motif.
   Fonts: Zilla Slab (headings) + Golos Text (body), self-hosted, SIL OFL (assets/fonts/OFL.txt). */

@font-face { font-family: "Zilla Slab"; src: url("/assets/fonts/zillaslab-600.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: "Zilla Slab"; src: url("/assets/fonts/zillaslab-700.woff2") format("woff2"); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: "Golos Text"; src: url("/assets/fonts/golostext.woff2") format("woff2"); font-weight: 400 900; font-style: normal; font-display: swap; }

:root {
  --ink: #23202A;
  --ink-2: #4D4753;
  --brick: #7A1F2B;
  --brick-d: #561520;
  --brick-2: #9A3341;
  --brick-t: #F7E7E6;
  --mustard: #E8A824;
  --mustard-d: #8A5E00;
  --mustard-t: #FCF0D2;
  --paper: #F6F2EC;
  --paper-2: #EDE6DB;
  --card: #FFFFFF;
  --line: #E0D6C9;
  --line-2: #CDBFAE;
  --ok: #1F6B4F;
  --ok-t: #E2F1EA;
  /* T568B pair colours, used as stripes */
  --c-or: #E07A1F; --c-gr: #3D8B4F; --c-bl: #2F64B5; --c-br: #7B4B2A;
  --cable: repeating-linear-gradient(90deg, #fff 0 14px, var(--c-or) 14px 28px, #fff 28px 42px, var(--c-gr) 42px 56px, #fff 56px 70px, var(--c-bl) 70px 84px, #fff 84px 98px, var(--c-br) 98px 112px);
  --head: "Zilla Slab", Rockwell, "Roboto Slab", Georgia, serif;
  --body: "Golos Text", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --r: 8px;
  --r-lg: 14px;
  --shadow: 0 1px 0 rgba(35, 32, 42, .06), 0 8px 22px -14px rgba(35, 32, 42, .35);
  --wrap: 1160px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: 1rem; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 1.0625rem/1.62 var(--body); overflow-wrap: break-word; }
img, svg { max-width: 100%; }
img { height: auto; }
a { color: var(--brick); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--brick-d); text-decoration-thickness: 2px; }
h1, h2, h3, h4 { font-family: var(--head); font-weight: 700; line-height: 1.15; margin: 0 0 .5em; color: var(--ink); letter-spacing: -.005em; }
h1 { font-size: clamp(2rem, 1.4rem + 2.6vw, 3.1rem); }
h2 { font-size: clamp(1.45rem, 1.2rem + 1vw, 1.95rem); }
h3 { font-size: 1.25rem; font-weight: 600; }
p, ul, ol, dl { margin: 0 0 1em; }
ul, ol { padding-left: 1.3em; }
strong { font-weight: 650; }
code { font-size: .9em; background: var(--paper-2); padding: .05em .3em; border-radius: 4px; }
:focus-visible { outline: 3px solid var(--mustard); outline-offset: 2px; box-shadow: 0 0 0 6px var(--ink); border-radius: 2px; }
main:focus { outline: none; }
.vh { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; left: 1rem; top: -4rem; z-index: 100; background: var(--ink); color: #fff; padding: .7rem 1rem; border-radius: var(--r); font-weight: 700; }
.skip:focus { top: 1rem; color: #fff; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }
@media (min-width: 700px) { .wrap { padding: 0 1.5rem; } }
.narrow { max-width: 820px; }
.small { font-size: .9rem; }
.muted { color: var(--ink-2); }
.print-only { display: none; }
.ic { width: 1.15em; height: 1.15em; vertical-align: -.2em; flex: none; }
[hidden] { display: none !important; }

/* ------------------------------------------------------------ sister ribbon + header */
.sister { background: var(--ink); color: #EDE6DB; font-size: .9rem; }
.sister-in { display: flex; justify-content: flex-end; }
.sister p { margin: 0; padding: .4rem 0; }
.sister a { color: #fff; font-weight: 650; text-decoration: none; white-space: nowrap; }
.sister a:hover { color: var(--mustard); text-decoration: underline; }
.sister-q { opacity: .85; }
.cable { height: 6px; background: var(--cable); }
.site-head { background: var(--card); border-bottom: 1px solid var(--line); }
.head-in { display: flex; align-items: center; gap: 1rem; padding-top: .8rem; padding-bottom: .8rem; }
.brand { display: flex; align-items: center; gap: .7rem; text-decoration: none; color: var(--ink); margin-right: auto; }
.brand:hover { color: var(--ink); }
.brand-mark { flex: none; width: 46px; height: 46px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-name { font: 700 1.45rem/1.05 var(--head); color: var(--brick); }
.brand-name i { font-style: normal; color: var(--ink); font-weight: 600; }
.brand-tag { font-size: .8rem; color: var(--ink-2); margin-top: .15rem; }
.nav-main { display: none; }
.nav-main ul, .nav-mobile ul { list-style: none; margin: 0; padding: 0; }
.nav-main ul { display: flex; gap: .2rem; flex-wrap: wrap; justify-content: flex-end; }
.nav-main a, .nav-mobile a { display: block; text-decoration: none; color: var(--ink); font-weight: 560; padding: .5rem .7rem; border-radius: 6px; }
.nav-main a:hover, .nav-mobile a:hover { background: var(--brick-t); color: var(--brick-d); }
.nav-main a[aria-current], .nav-mobile a[aria-current] { color: var(--brick); box-shadow: inset 0 -3px 0 var(--mustard); border-radius: 6px 6px 0 0; }
.nav-mobile { position: relative; }
.nav-mobile summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: .5rem; font-weight: 650; padding: .55rem .8rem; border: 2px solid var(--ink); border-radius: var(--r); min-height: 44px; }
.nav-mobile summary::-webkit-details-marker { display: none; }
.burger { display: inline-grid; gap: 3px; }
.burger i { display: block; width: 18px; height: 2px; background: currentColor; }
.nav-mobile[open] summary { background: var(--ink); color: #fff; }
.nav-mobile nav { position: absolute; right: 0; top: calc(100% + .5rem); z-index: 30; background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); box-shadow: var(--shadow); padding: .5rem; min-width: 15rem; }
@media (min-width: 1040px) { .nav-main { display: block; } .nav-mobile { display: none; } }

/* ------------------------------------------------------------ buttons, kickers, chips */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; min-height: 46px; padding: .6rem 1.15rem; border-radius: 6px; font: 650 1rem/1.2 var(--body); text-decoration: none; cursor: pointer; border: 2px solid transparent; }
.btn-main { background: var(--brick); color: #fff; border-color: var(--brick); }
.btn-main:hover { background: var(--brick-d); border-color: var(--brick-d); color: #fff; }
.btn-line { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn-line:hover { background: var(--ink); color: #fff; }
.btn-mustard { background: var(--mustard); color: var(--ink); border-color: var(--mustard); }
.btn-mustard:hover { background: #F2BE4E; border-color: #F2BE4E; color: var(--ink); }
.btn-sm { min-height: 40px; padding: .4rem .85rem; font-size: .93rem; }
.kicker { display: inline-flex; align-items: center; gap: .45rem; font-size: .82rem; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; color: var(--brick); margin-bottom: .6rem; }
.kicker-light { color: var(--mustard); }
.lead { font-size: 1.16rem; color: var(--ink-2); max-width: 62ch; }
.link-arrow { display: inline-flex; align-items: center; gap: .3rem; font-weight: 650; text-decoration: none; }
.link-arrow:hover { text-decoration: underline; }
.chip { display: inline-flex; align-items: center; gap: .35rem; padding: .25rem .65rem; border-radius: 4px; background: var(--paper-2); font-size: .86rem; font-weight: 560; }
.chip-ok { background: var(--ok-t); color: var(--ok); }
.chip a { text-decoration: none; }

/* ------------------------------------------------------------ page heads, crumbs */
.page-head { padding: 1.6rem 0 1.2rem; }
.page-head h1 { max-width: 24ch; }
.crumbs ol { list-style: none; margin: 0 0 1rem; padding: 0; display: flex; flex-wrap: wrap; gap: .25rem; font-size: .88rem; color: var(--ink-2); }
.crumbs li + li::before { content: "›"; margin-right: .3rem; color: var(--line-2); }
.crumbs a { color: var(--ink-2); }
.section { padding: 2.4rem 0; }
.section-h { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .4rem 1rem; margin-bottom: .9rem; }
.section-title { margin: 0; position: relative; padding-top: .7rem; }
.section-title::before { content: ""; position: absolute; left: 0; top: 0; width: 56px; height: 5px; background: var(--cable); background-size: 112px 5px; }
.two-col { display: grid; gap: 2.2rem; }
@media (min-width: 900px) { .two-col { grid-template-columns: 1fr 1fr; gap: 3rem; } }

/* ------------------------------------------------------------ home */
.hero { background: var(--card); border-bottom: 1px solid var(--line); padding: 2.2rem 0 2.6rem; }
.hero-grid { display: grid; gap: 2rem; align-items: center; }
@media (min-width: 900px) { .hero-grid { grid-template-columns: 1.08fr .92fr; gap: 3rem; } }
.hero h1 { max-width: 17ch; }
.hl { background: linear-gradient(transparent 62%, var(--mustard-t) 62%, var(--mustard-t) 92%, transparent 92%); color: var(--brick); }
.hero-btns { display: flex; flex-wrap: wrap; gap: .7rem; margin: 1.4rem 0 1rem; }
.hero-note { font-size: .92rem; color: var(--ink-2); display: flex; gap: .4rem; align-items: flex-start; }
.ic-tick { color: var(--ok); }
.hero-art { display: block; width: 100%; height: auto; border-radius: var(--r-lg); border: 1px solid var(--line); box-shadow: var(--shadow); }
.who-grid { list-style: none; padding: 0; margin: 1rem 0; display: grid; gap: 1rem; }
@media (min-width: 760px) { .who-grid { grid-template-columns: repeat(3, 1fr); } }
.who-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.2rem 1.2rem 1rem; border-top: 5px solid var(--brick); }
.who-card .ic { width: 32px; height: 32px; color: var(--brick); }
.who-card h3 { margin: .5rem 0 .3rem; }
.who-card p { margin: 0; color: var(--ink-2); }
.who-x { font-weight: 560; }
.who-x a { font-weight: 700; }
.quick-list { list-style: none; counter-reset: q; padding: 0; margin: 0 0 1rem; }
.quick-list li { counter-increment: q; position: relative; padding: .75rem 0 .75rem 3rem; border-bottom: 1px dashed var(--line-2); }
.quick-list li::before { content: counter(q); position: absolute; left: 0; top: .75rem; width: 2.1rem; height: 2.1rem; display: grid; place-items: center; background: var(--brick); color: #fff; font: 700 1.05rem/1 var(--head); clip-path: polygon(0 22%, 28% 22%, 28% 0, 72% 0, 72% 22%, 100% 22%, 100% 100%, 0 100%); padding-top: .3rem; }
.q-grp { display: block; font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; font-weight: 700; color: var(--ink-2); }
.quick-list a { font-weight: 600; }
.figs { display: grid; gap: .8rem; }
@media (min-width: 560px) { .figs { grid-template-columns: 1fr 1fr; } }
.fig-cell { display: flex; flex-direction: column; gap: .2rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: .9rem 1rem; text-decoration: none; color: var(--ink); border-left: 5px solid var(--mustard); }
.fig-cell:hover { border-color: var(--brick); color: var(--ink); }
.fig-lab { font-size: .9rem; color: var(--ink-2); }
.fig-val { font: 700 1.5rem/1.15 var(--head); color: var(--brick); }
.fig-src { font-size: .8rem; color: var(--ink-2); }
.guides-band { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.topic-grid { display: grid; gap: 1.6rem; }
@media (min-width: 760px) { .topic-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1100px) { .topic-grid { grid-template-columns: repeat(4, 1fr); } }
.topic-h { font-size: 1.15rem; padding-bottom: .4rem; border-bottom: 2px solid var(--ink); }
.port-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .35rem; }
.port-list a { display: flex; align-items: center; gap: .7rem; text-decoration: none; color: var(--ink); padding: .4rem .3rem; border-radius: 6px; font-weight: 560; line-height: 1.3; }
.port-list a:hover { background: var(--brick-t); color: var(--brick-d); }
.port-list-wide { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
/* the RJ45 "port" badge — the site's motif */
.port { flex: none; display: inline-grid; place-items: center; width: 2.6rem; height: 2.2rem; padding-top: .35rem; background: var(--ink); color: #fff; font: 700 .95rem/1 var(--head); letter-spacing: .02em;
  clip-path: polygon(0 24%, 25% 24%, 25% 0, 75% 0, 75% 24%, 100% 24%, 100% 100%, 0 100%); }
.port-lg { width: 4.4rem; height: 4.2rem; padding-top: .8rem; font-size: 1.6rem; background: var(--brick); align-content: center; gap: .1rem; }
.port-lg small { font: 700 .62rem/1 var(--body); text-transform: uppercase; letter-spacing: .08em; color: var(--mustard-t); }
.calc-band { background: var(--brick); color: #F9ECEA; padding: 2.6rem 0; position: relative; }
.calc-band::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 6px; background: var(--cable); }
.calc-band h2 { color: #fff; }
.calc-band-in { display: grid; gap: 1.8rem; align-items: center; }
@media (min-width: 900px) { .calc-band-in { grid-template-columns: 1.1fr .9fr; gap: 3rem; } }
.quick-calc { background: var(--card); color: var(--ink); border-radius: var(--r-lg); padding: 1.2rem; box-shadow: 0 16px 30px -18px rgba(0, 0, 0, .55); }
.qc-h { font: 700 1.15rem/1.2 var(--head); margin-bottom: .6rem; }
.qc-row { display: grid; grid-template-columns: 1fr 7.5rem; gap: .6rem; align-items: center; margin-bottom: .6rem; }
.qc-row label { font-weight: 600; }
.qc-row label span { color: var(--ink-2); font-weight: 400; }
.quick-calc .btn { width: 100%; margin-top: .3rem; }
.sites-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.3rem 1.3rem .4rem; }
.sites-card .section-title { font-size: 1.35rem; margin-bottom: .6rem; }

/* ------------------------------------------------------------ forms */
input[type="text"], input[type="url"], input[type="email"], input[type="search"], select, textarea {
  width: 100%; font: inherit; color: var(--ink); background: #fff; border: 2px solid #8E8494; border-radius: 6px; padding: .55rem .7rem; min-height: 46px; }
textarea { min-height: 6rem; resize: vertical; }
input:focus-visible, select:focus-visible, textarea:focus-visible { border-color: var(--ink); }
.field { margin: 0 0 1.1rem; }
.field > label, .field legend, .flt label { display: block; font-weight: 650; margin-bottom: .25rem; }
.field-hint { display: block; font-size: .9rem; color: var(--ink-2); margin-bottom: .35rem; }
.field-hint a { font-weight: 600; }
.opt { font-weight: 400; color: var(--ink-2); font-size: .9em; }
.has-error input, .has-error select, .has-error textarea { border-color: #B3261E; }
.field-error { color: #B3261E; font-weight: 650; margin: .3rem 0 0; font-size: .95rem; }
.form-error { border: 2px solid #B3261E; background: #FDECEA; border-radius: var(--r); padding: .9rem 1rem; margin: 0 0 1.2rem; }
.form-error p { margin: 0 0 .3rem; }
.form-error ul { margin: 0; }
.form-error a { color: #8C1D17; font-weight: 600; }
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
.checks, .radios { margin-bottom: 1.2rem; }
.checks:focus { outline: none; }
.check-grid { display: grid; gap: .3rem .9rem; }
@media (min-width: 560px) { .check-grid { grid-template-columns: 1fr 1fr; } }
.check { display: flex; align-items: flex-start; gap: .55rem; padding: .35rem 0; font-weight: 500; cursor: pointer; }
.check input { width: 1.25rem; height: 1.25rem; margin: .18rem 0 0; accent-color: var(--brick); flex: none; }
.form-h { font-size: 1.4rem; margin-top: 1.8rem; padding-top: .9rem; border-top: 2px solid var(--ink); }
.sub-form { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.3rem; margin-bottom: 2rem; }
@media (min-width: 700px) { .sub-form { padding: 1.8rem 2rem; } }

/* ------------------------------------------------------------ guides */
.guide-index { display: grid; gap: 2rem; margin-bottom: 2rem; }
.gi-topic { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.3rem; }
.gi-head h2 { margin-bottom: .2rem; }
.gi-head p { color: var(--ink-2); }
.gi-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .3rem; }
@media (min-width: 900px) { .gi-list { grid-template-columns: 1fr 1fr; gap: .6rem 1.4rem; } }
.gi-list a { display: flex; gap: .9rem; text-decoration: none; color: var(--ink); padding: .7rem .5rem; border-radius: var(--r); }
.gi-list a:hover { background: var(--brick-t); }
.gi-body { display: flex; flex-direction: column; gap: .15rem; }
.gi-title { font: 700 1.15rem/1.25 var(--head); color: var(--brick); }
.gi-sum { color: var(--ink-2); font-size: .95rem; }
.gi-meta { font-size: .8rem; color: var(--ink-2); }
.guide-head { background: var(--card); border-bottom: 1px solid var(--line); padding: 1.4rem 0 1.4rem; margin-bottom: 1.8rem; }
.gh-in { display: flex; gap: 1.1rem; align-items: flex-start; }
.gh-in h1 { max-width: 26ch; margin-bottom: .3rem; }
.gh-in .kicker { margin-bottom: .3rem; }
.guide-meta { list-style: none; padding: 0; margin: .8rem 0 0; display: flex; flex-wrap: wrap; gap: .45rem; }
.guide-layout { display: grid; gap: 2rem; }
@media (min-width: 1000px) { .guide-layout { grid-template-columns: minmax(0, 1fr) 290px; gap: 3rem; } }
.prose { max-width: 72ch; }
.prose h2 { margin-top: 2rem; padding-top: .8rem; border-top: 2px solid var(--line); }
.prose h3 { margin-top: 1.5rem; }
.prose li { margin-bottom: .35rem; }
.glance { background: var(--mustard-t); border: 2px solid var(--mustard); border-radius: var(--r-lg); padding: 1.1rem 1.3rem .5rem; margin: 0 0 1.6rem; }
.prose .glance-h, .glance-h { font-size: 1.15rem; display: flex; align-items: center; gap: .4rem; margin: 0 0 .5rem; border: 0; padding: 0; }
.callout { background: var(--card); border: 1px solid var(--line); border-left: 6px solid var(--c-bl); border-radius: var(--r); padding: .9rem 1.1rem; margin: 1.2rem 0; }
.callout p { margin: 0; }
.callout.warn { border-left-color: var(--mustard); background: #FFFBF0; }
.callout.ask { border-left-color: var(--brick); background: var(--brick-t); }
.callout-h { font-weight: 750; margin-bottom: .25rem !important; }
.table-wrap { overflow-x: auto; margin: 1.2rem 0; }
.md-table, .statement { width: 100%; border-collapse: collapse; background: var(--card); font-size: .96rem; }
.md-table th, .md-table td, .statement th, .statement td { text-align: left; padding: .6rem .7rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.md-table thead th { background: var(--ink); color: #fff; font-weight: 650; }
.toc-mobile { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: .6rem 1rem; margin-bottom: 1.4rem; }
.toc-mobile summary { font-weight: 700; cursor: pointer; }
@media (min-width: 1000px) { .toc-mobile { display: none; } }
.guide-side { display: none; }
@media (min-width: 1000px) { .guide-side { display: block; } .side-in { position: sticky; top: 1rem; } }
.toc { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1rem 1.1rem; margin-bottom: 1.2rem; }
.toc h2, .side-tools h2 { font-size: 1rem; text-transform: uppercase; letter-spacing: .06em; color: var(--ink-2); margin-bottom: .5rem; }
.toc ol { margin: 0; padding-left: 1.2em; font-size: .94rem; }
.toc li { margin: .3rem 0; }
.side-tool { display: flex; gap: .7rem; align-items: flex-start; text-decoration: none; color: var(--ink); background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: .75rem .85rem; margin-bottom: .6rem; }
.side-tool:hover { border-color: var(--brick); color: var(--ink); }
.side-tool .ic { color: var(--brick); margin-top: .15rem; }
.side-tool span span { display: block; font-size: .86rem; color: var(--ink-2); }
.related, .sources { margin-top: 2rem; }
.sources ol { padding-left: 1.3em; }
.faq-list details { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); margin-bottom: .6rem; }
.faq-list summary { cursor: pointer; padding: .85rem 1rem; font-weight: 650; list-style-position: outside; margin-left: 1rem; }
.faq-a { padding: 0 1rem .4rem 1.3rem; }
.see { font-size: .92rem; }
.xsite { background: var(--ink); color: #EDE6DB; border-radius: var(--r-lg); padding: 1rem 1.2rem; margin: 2rem 0 1rem; }
.xsite p { margin: 0; }
.xsite a { color: var(--mustard); font-weight: 700; }
.related-band { margin: 2.4rem 0 1rem; }
.pager { display: grid; gap: .8rem; margin: 1.6rem 0 2.6rem; }
@media (min-width: 700px) { .pager { grid-template-columns: 1fr 1fr; } }
.pager a { display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: .8rem 1rem; text-decoration: none; }
.pager a:hover { border-color: var(--brick); }
.pager-next { text-align: right; }
.pager-l { font-size: .82rem; color: var(--ink-2); text-transform: uppercase; letter-spacing: .06em; font-weight: 650; }
.pager-t { font: 700 1.1rem/1.25 var(--head); }
.notice { display: flex; gap: .8rem; align-items: flex-start; background: var(--card); border: 1px dashed var(--line-2); border-radius: var(--r); padding: .9rem 1rem; margin: 2rem 0; font-size: .94rem; color: var(--ink-2); }
.notice p { margin: 0; }
.notice-i { width: 1.4rem; height: 1.4rem; color: var(--brick); flex: none; }

/* ------------------------------------------------------------ estimator */
.calc { display: grid; gap: 1.6rem; margin-bottom: 2rem; align-items: start; }
@media (min-width: 960px) { .calc { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 2.2rem; } .calc-out { position: sticky; top: 1rem; } }
.calc-fs { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.1rem 1.2rem .2rem; margin-bottom: 1rem; }
.calc-fs legend { font: 700 1.2rem/1.2 var(--head); display: flex; align-items: center; gap: .55rem; float: left; width: 100%; margin-bottom: .9rem; }
.calc-fs legend + * { clear: both; }
.step { display: inline-grid; place-items: center; width: 1.9rem; height: 1.7rem; padding-top: .25rem; background: var(--brick); color: #fff; font-size: .95rem; clip-path: polygon(0 24%, 25% 24%, 25% 0, 75% 0, 75% 24%, 100% 24%, 100% 100%, 0 100%); }
.unit-box { display: flex; align-items: stretch; max-width: 18rem; }
.unit-box input { border-radius: 6px 0 0 6px; }
.unit-box span { display: flex; align-items: center; padding: 0 .75rem; background: var(--paper-2); border: 2px solid #8E8494; border-left: 0; border-radius: 0 6px 6px 0; font-weight: 600; color: var(--ink-2); white-space: nowrap; }
.calc-actions { display: flex; flex-wrap: wrap; gap: .6rem; }
.calc-intro, .bw-result { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.2rem 1.3rem; }
.steps { padding-left: 1.3em; }
.bw-h { font-size: 1.2rem; margin-bottom: .2rem; }
.dial { position: relative; max-width: 320px; margin: 0 auto .8rem; }
.dial-svg { display: block; width: 100%; height: auto; }
.dial-svg path { transition: stroke-dasharray .4s ease; }
.dial-v { position: absolute; left: 0; right: 0; bottom: 0; margin: 0; text-align: center; font: 700 clamp(1.5rem, 1.1rem + 1.6vw, 2.1rem)/1.1 var(--head); color: var(--brick); }
.dial-l { display: block; font: 600 .82rem/1.2 var(--body); text-transform: uppercase; letter-spacing: .07em; color: var(--ink-2); }
.statement td { text-align: right; font-weight: 650; white-space: nowrap; }
.bw-note { margin: .8rem 0; font-weight: 560; }
.share { margin-top: 1rem; }
.share label { font-weight: 650; display: block; margin-bottom: .3rem; }
.share-row { display: flex; gap: .5rem; }
.share-row input { font-size: .85rem; }
.calc-notes { margin-top: 1rem; }

/* ------------------------------------------------------------ checklist */
.cl-bar { position: sticky; top: 0; z-index: 10; background: var(--paper); border-bottom: 1px solid var(--line); padding: .7rem 0; margin-bottom: 1.2rem; display: grid; gap: .5rem; }
@media (min-width: 760px) { .cl-bar { grid-template-columns: auto 1fr auto; align-items: center; gap: 1rem; } .cl-note { grid-column: 1 / -1; } }
.cl-progress { margin: 0; font-weight: 700; }
.cl-meter { height: 10px; background: var(--paper-2); border-radius: 99px; overflow: hidden; }
.cl-meter span { display: block; height: 100%; background: var(--cable); background-size: 112px 10px; transition: width .3s; }
.cl-btns { display: flex; flex-wrap: wrap; gap: .5rem; margin: 0; }
.cl-note { margin: 0; }
.checklist { display: grid; gap: 1.4rem; margin-bottom: 1.4rem; }
.cl-group { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.1rem 1.2rem .6rem; }
.cl-head { position: relative; border-bottom: 2px solid var(--ink); margin-bottom: .4rem; padding-right: 3.5rem; }
.cl-head h2 { margin-bottom: .2rem; }
.cl-head p { color: var(--ink-2); margin-bottom: .6rem; }
.cl-count { position: absolute; right: 0; top: .2rem; font: 700 1.1rem/1 var(--head); color: var(--brick); margin: 0; }
.cl-items { list-style: none; margin: 0; padding: 0; }
.cl-item { position: relative; padding: .7rem 0 .7rem 2.4rem; border-bottom: 1px dashed var(--line); }
.cl-item:last-child { border-bottom: 0; }
.cl-item input { position: absolute; left: .2rem; top: .85rem; width: 1.5rem; height: 1.5rem; opacity: 0; margin: 0; cursor: pointer; }
.cl-item label { cursor: pointer; font-weight: 600; display: block; }
.cl-box { position: absolute; left: .2rem; top: .78rem; width: 1.5rem; height: 1.5rem; border: 2px solid var(--ink); border-radius: 4px; background: #fff; color: transparent; display: grid; place-items: center; }
.cl-box .ic { width: 1.1rem; height: 1.1rem; }
.cl-item input:checked + label .cl-box { background: var(--ok); border-color: var(--ok); color: #fff; }
.cl-item input:checked + label .cl-text { color: var(--ink-2); text-decoration: line-through; text-decoration-color: var(--ok); }
.cl-item input:focus-visible + label .cl-box { outline: 3px solid var(--mustard); outline-offset: 2px; }
.cl-more { font-size: .93rem; color: var(--ink-2); margin-top: .25rem; }
.cl-more p { margin: 0 0 .25rem; }

/* ------------------------------------------------------------ directory */
.filters { display: grid; gap: .8rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1rem 1.1rem; margin-bottom: 1rem; border-top: 5px solid var(--ink); }
@media (min-width: 760px) { .filters { grid-template-columns: repeat(3, 1fr) auto; align-items: end; } }
.flt-btns { margin: 0; display: flex; gap: .5rem; flex-wrap: wrap; }
.dir-count { font-weight: 650; }
.dir-grid { list-style: none; margin: 0 0 2rem; padding: 0; display: grid; gap: 1rem; }
@media (min-width: 760px) { .dir-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1100px) { .dir-grid { grid-template-columns: repeat(3, 1fr); } }
.dir-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.1rem 1.1rem .8rem; display: flex; flex-direction: column; }
.dir-name { font-size: 1.3rem; margin-bottom: .2rem; }
.dir-based { font-size: .86rem; color: var(--ink-2); margin-bottom: .5rem; }
.dir-sum { font-size: .96rem; }
.tags { list-style: none; padding: 0; margin: 0 0 .7rem; display: flex; flex-wrap: wrap; gap: .3rem; }
.tag { font-size: .78rem; font-weight: 650; padding: .15rem .5rem; border-radius: 3px; background: var(--paper-2); border-left: 4px solid var(--ink-2); }
.tag-connectivity, .tag-backup { border-left-color: var(--c-bl); }
.tag-filtering, .tag-monitoring { border-left-color: var(--c-or); }
.tag-network, .tag-wifi { border-left-color: var(--c-gr); }
.tag-cyber, .tag-voice { border-left-color: var(--c-br); }
.dir-facts { margin: 0 0 .7rem; font-size: .9rem; }
.dir-facts div { display: grid; grid-template-columns: 6.2rem 1fr; gap: .4rem; padding: .25rem 0; border-top: 1px dashed var(--line); }
.dir-facts dt { font-weight: 650; color: var(--ink-2); }
.dir-facts dd { margin: 0; }
.badge { display: inline-block; font-size: .72rem; font-weight: 750; text-transform: uppercase; letter-spacing: .04em; padding: .1rem .4rem; border-radius: 3px; margin-right: .2rem; }
.badge-says { background: var(--mustard-t); color: var(--mustard-d); border: 1px solid var(--mustard); }
.badge-ok { background: var(--ok-t); color: var(--ok); border: 1px solid var(--ok); }
.dir-foot { margin: auto 0 0; padding-top: .5rem; display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; justify-content: space-between; }
.dir-meta { font-size: .8rem; color: var(--ink-2); }
.dir-ad:has(> .ad-slot[hidden]), .dir-ad:empty { display: none; }
.dir-add { display: grid; gap: .5rem 1.5rem; align-items: center; background: var(--brick-t); border: 1px solid #E8C9C7; border-radius: var(--r-lg); padding: 1.2rem 1.3rem; }
@media (min-width: 760px) { .dir-add { grid-template-columns: 1fr auto; } }
.dir-add h2 { font-size: 1.35rem; margin-bottom: .2rem; }
.dir-add p { margin: 0; }
.empty { background: var(--card); border: 1px dashed var(--line-2); border-radius: var(--r); padding: 1rem; }

/* ------------------------------------------------------------ figures, glossary, sources, misc */
.fig-cards { display: grid; gap: 1rem; margin-bottom: 1.6rem; }
@media (min-width: 760px) { .fig-cards { grid-template-columns: 1fr 1fr; } }
.fig-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1.1rem 1.2rem; border-left: 6px solid var(--mustard); }
.fc-label { font: 650 1rem/1.3 var(--body); color: var(--ink-2); margin-bottom: .3rem; }
.fc-value { font: 700 1.7rem/1.15 var(--head); color: var(--brick); margin-bottom: .3rem; }
.fc-meta { font-size: .86rem; font-weight: 650; margin-bottom: .4rem; }
.fc-note { font-size: .95rem; }
.fc-src { font-size: .84rem; margin: 0; }
.jump ul { list-style: none; margin: 0 0 1.4rem; padding: 0; display: flex; flex-wrap: wrap; gap: .35rem; }
.jump a { display: inline-block; min-width: 2.4rem; text-align: center; padding: .35rem .6rem; background: var(--card); border: 1px solid var(--line); border-radius: 4px; text-decoration: none; font-weight: 650; }
.jump a:hover { background: var(--brick); color: #fff; }
.gl-sec { display: grid; gap: .5rem; margin-bottom: 1.4rem; }
@media (min-width: 760px) { .gl-sec { grid-template-columns: 4rem 1fr; } }
.gl-letter { font-size: 2.2rem; color: var(--brick); margin: 0; }
.gl { margin: 0; }
.gl-item { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: .8rem 1rem; margin-bottom: .6rem; }
.gl dt { font: 700 1.15rem/1.3 var(--head); }
.gl dd { margin: .3rem 0 0; }
.gl dd p:last-child { margin-bottom: 0; }
.faq-sec { margin-bottom: 1.8rem; }
.faq-sec .section-title { margin-bottom: .8rem; }
.src-wrap { display: grid; gap: 1rem; margin-bottom: 1.4rem; }
@media (min-width: 900px) { .src-wrap { grid-template-columns: 1fr 1fr; } }
.src-group { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-lg); padding: 1rem 1.2rem; }
.src-group h2 { font-size: 1.1rem; }
.src-list { padding-left: 1.1em; margin: 0; }
.src-list li { margin-bottom: .6rem; }
.used { display: block; font-size: .84rem; color: var(--ink-2); }
.contact-card { display: flex; align-items: center; gap: .5rem; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 1rem; font-size: 1.1rem; font-weight: 600; }
.err-page { padding: 3rem 16px; }
.err-links { font-size: 1.1rem; }
.credits-list { list-style: none; padding: 0; }
.credits-list li { display: flex; gap: 1rem; margin-bottom: 1rem; }

/* ------------------------------------------------------------ footer */
.site-foot { background: var(--ink); color: #DCD4E0; margin-top: 3rem; font-size: .95rem; }
.site-foot a { color: #fff; }
.site-foot a:hover { color: var(--mustard); }
.foot-top { padding: 1.8rem 0 .4rem; display: grid; gap: .6rem; }
.foot-name { font: 700 1.35rem/1.2 var(--head); color: #fff; margin-right: .3rem; }
.foot-disclaimer { max-width: 80ch; }
.foot-cols { display: grid; gap: 1.5rem; padding: 1.4rem 0; border-top: 1px solid rgba(255, 255, 255, .15); }
@media (min-width: 700px) { .foot-cols { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1040px) { .foot-cols { grid-template-columns: 1fr 1fr 1fr 1.4fr; } }
.foot-h { font: 700 1.05rem/1.25 var(--head); color: var(--mustard); margin-bottom: .5rem; }
.foot-cols ul { list-style: none; margin: 0; padding: 0; }
.foot-cols li { margin: .3rem 0; }
.foot-cols a { text-decoration: none; display: inline-block; padding: .1rem 0; }
.foot-cols a:hover { text-decoration: underline; }
.foot-sites li { margin-bottom: .55rem; }
.foot-legal { border-top: 1px solid rgba(255, 255, 255, .15); padding: 1.1rem 0 1.4rem; font-size: .86rem; }
.foot-legal p { margin: 0 0 .5rem; }

/* ------------------------------------------------------------ ads (5od) + cookie choice */
.ad-slot[hidden], .cookie-bar[hidden] { display: none !important; }
.ad-slot { display: block; margin: 1.4rem auto; }
.ad-slot:has(ins[data-fiveod="empty"], ins[data-fiveod="error"], ins[data-fiveod="nofit"]) { display: none !important; }
.ad-in { display: flex; justify-content: center; }
.ad-head { max-width: var(--wrap); padding: 0 16px; margin-top: 1.4rem; margin-bottom: 1.4rem; }
@media (min-width: 700px) { .ad-head { padding: 0 1.5rem; } }
.ad-body, .ad-list { padding: 1rem 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.dir-ad .ad-slot { margin: 0; border: 0; }
.cookie-bar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; background: var(--card); color: var(--ink);
  padding: 1.3rem 0 1.1rem; max-height: 80vh; overflow-y: auto; border-top: 4px solid var(--brick); box-shadow: 0 -12px 30px -14px rgba(35, 32, 42, .45); }
.cookie-bar::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 6px; background: var(--cable); }
.cookie-in { display: grid; gap: .8rem 2rem; align-items: center; }
@media (min-width: 860px) { .cookie-in { grid-template-columns: minmax(0, 1fr) auto; } }
.cookie-h { font-size: 1.4rem; margin: .2rem 0 .25rem; color: var(--brick); }
.cookie-txt p { margin: 0 0 .4rem; font-size: .97rem; line-height: 1.5; }
.cookie-bar a { color: var(--brick); font-weight: 650; }
.cookie-now { font-weight: 700; color: var(--ok); }
.cookie-btns { display: flex; flex-wrap: wrap; gap: .7rem; }
.cookie-btn { flex: 1 1 12rem; min-height: 48px; padding: .6rem 1.2rem; border-radius: 6px; border: 2px solid var(--brick); cursor: pointer; font: 700 1rem/1.2 var(--body); background: var(--brick); color: #fff; }
.cookie-btn:hover { background: var(--brick-d); border-color: var(--brick-d); }
.cookie-h:focus { outline: none; }
.cookie-h:focus-visible { outline: 3px solid var(--mustard); box-shadow: none; }
@media (prefers-reduced-motion: no-preference) { .cookie-bar { animation: cookie-up .25s ease-out; } }
@keyframes cookie-up { from { transform: translateY(100%); } to { transform: none; } }

/* ------------------------------------------------------------ motion + print */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}
@media print {
  @page { margin: 14mm; }
  body { background: #fff; font-size: 11pt; color: #000; }
  .sister, .site-head, .site-foot, .crumbs, .skip, .notice, .cl-btns, .cl-note, .hero-btns, .guide-side, .toc-mobile, .pager, .related-band, .share, .calc-actions, .calc-intro, .xsite, .filters, .dir-add, .cookie-bar, .ad-slot, noscript { display: none !important; }
  .print-only { display: block; }
  a { color: #000; text-decoration: none; }
  .page-head { padding: 0 0 6pt; }
  h1 { font-size: 20pt; }
  .cl-bar { position: static; border: 0; padding: 0; margin: 0 0 6pt; background: none; display: block; }
  .cl-meter { display: none; }
  .checklist { display: block; }
  .cl-group { border: 1pt solid #999; border-radius: 6pt; padding: 8pt 10pt 4pt; margin-bottom: 8pt; break-inside: auto; }
  .cl-head { border-bottom: 1.5pt solid #000; break-after: avoid; }
  .cl-head .cl-count { display: none !important; }
  .cl-item { padding: 4pt 0 4pt 22pt; break-inside: avoid; }
  .cl-box { width: 13pt; height: 13pt; top: 4pt; border: 1.5pt solid #000; background: #fff !important; }
  .cl-item input:checked + label .cl-box { color: #000; }
  .cl-item input:checked + label .cl-text { text-decoration: none; color: #000; }
  .print-foot { font-size: 8.5pt; color: #333; margin-top: 10pt; }
  .calc { display: block; }
  .calc-fs, .bw-result, .glance, .dir-card { box-shadow: none; border: 1pt solid #999; }
}
@media (max-width: 420px) { .brand-tag { display: none; } .brand-name { font-size: 1.3rem; } }
.qc-row-1 { grid-template-columns: 1fr; gap: .25rem; }
.us-cmp { border-top: 1px dashed var(--line-2); margin-top: .8rem; padding-top: .6rem; }
.share-row .btn { white-space: nowrap; flex: none; }
.guide-layout > *, .src-wrap > *, .two-col > *, .calc > *, .dir-grid > *, .hero-grid > * { min-width: 0; }
.src-list a, .sources a, .fc-src a, .dir-facts a { overflow-wrap: anywhere; }