:root {
  color-scheme: light;
  --ink: #12252b;
  --muted: #53676d;
  --paper: #f6f8f4;
  --white: #fff;
  --line: #dce6df;
  --teal: #0a756c;
  --teal-dark: #07584f;
  --mint: #e7f4ed;
  --lime: #d9f379;
  --navy: #102c33;
  --gold: #edb653;
  --shadow: 0 18px 48px rgba(18, 37, 43, .10);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 6rem; }
body { margin: 0; background: var(--paper); color: var(--ink); line-height: 1.62; }
a { color: var(--teal-dark); text-underline-offset: 3px; }
a:hover { color: #034b47; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }
button, input { font: inherit; }
.skip-link { position: absolute; top: -50px; left: 1rem; z-index: 10; padding: .6rem 1rem; background: white; border-radius: .5rem; }
.skip-link:focus { top: 1rem; }
.site-header { position: sticky; top: 0; z-index: 8; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 1.3rem; max-width: 1320px; margin: auto; padding: .8rem clamp(1rem, 3vw, 2rem); border-bottom: 1px solid rgba(220, 230, 223, .8); background: rgba(255,255,255,.91); backdrop-filter: blur(16px); }
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--ink); font-size: 1rem; font-weight: 800; text-decoration: none; white-space: nowrap; }
.brand b { color: var(--teal); }
.brand-mark { display: grid; place-items: center; width: 2.4rem; height: 2.4rem; border-radius: .8rem; background: linear-gradient(140deg, var(--teal), #12434b); color: white; font-size: .78rem; letter-spacing: -.05em; box-shadow: 0 5px 12px rgba(10,117,108,.2); }
.site-header nav { display: flex; justify-content: center; gap: clamp(.55rem, 1.6vw, 1.25rem); min-width: 0; }
.site-header nav a, .footer-links a { color: var(--muted); font-size: .87rem; font-weight: 650; text-decoration: none; white-space: nowrap; }
.site-header nav a:hover, .footer-links a:hover { color: var(--teal-dark); }
.nav-cta { padding: .6rem .9rem; border-radius: 999px; background: var(--ink); color: white; font-size: .85rem; font-weight: 750; text-decoration: none; white-space: nowrap; }
.nav-cta:hover { background: var(--teal-dark); color: white; }
main { max-width: 1320px; margin: auto; padding: 0 clamp(1rem, 3vw, 2rem); }
.hero { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(340px, .96fr); align-items: center; gap: clamp(2rem, 5vw, 5rem); padding: clamp(3.3rem, 7vw, 6.5rem) 0 clamp(3rem, 5vw, 4.5rem); }
.hero::before { position: absolute; top: 0; right: -9vw; z-index: -1; width: 58vw; height: 95%; border-radius: 0 0 0 42%; background: radial-gradient(ellipse at 70% 25%, rgba(217,243,121,.35), transparent 52%), linear-gradient(140deg, rgba(231,244,237,.65), rgba(241,246,237,0)); content: ""; }
.hero-copy { max-width: 650px; }
.eyebrow { margin: 0 0 .7rem; color: var(--teal); font-size: .75rem; font-weight: 850; letter-spacing: .14em; text-transform: uppercase; }
.hero h1 { max-width: 720px; margin: .2rem 0 1.15rem; font-size: clamp(2.7rem, 6.5vw, 5.5rem); line-height: .99; letter-spacing: -.065em; }
.hero h1 span { color: var(--teal); }
.lead { max-width: 640px; margin: 0; color: var(--muted); font-size: clamp(1.06rem, 1.6vw, 1.22rem); line-height: 1.65; }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin: 1.7rem 0 1.1rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .55rem; min-height: 3rem; padding: .8rem 1.15rem; border: 1px solid transparent; border-radius: .85rem; font-weight: 780; text-decoration: none; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); box-shadow: 0 9px 22px rgba(18,37,43,.14); }
.primary { background: var(--teal); color: white; }
.primary:hover { background: var(--teal-dark); color: white; }
.secondary { border-color: var(--line); background: white; color: var(--ink); }
.as-of, .muted { color: var(--muted); font-size: .86rem; }
.hero-art { position: relative; min-height: 420px; overflow: visible; border: 1px solid rgba(255,255,255,.85); border-radius: 2rem; background: #dfe9dc; box-shadow: 0 30px 70px rgba(18,37,43,.17); transform: rotate(1deg); }
.hero-art img { display: block; width: 100%; height: 100%; min-height: 420px; border-radius: inherit; object-fit: cover; }
.hero-art::after { position: absolute; inset: 55% 0 0; border-radius: 0 0 2rem 2rem; background: linear-gradient(transparent, rgba(16,44,51,.2)); content: ""; pointer-events: none; }
.hero-float { position: absolute; right: -1rem; bottom: 1.2rem; z-index: 1; max-width: 240px; padding: .95rem 1.1rem; border: 1px solid rgba(255,255,255,.9); border-radius: 1rem; background: rgba(255,255,255,.94); box-shadow: var(--shadow); transform: rotate(-1deg); }
.hero-float strong { display: block; font-size: .95rem; }
.hero-float span { display: block; color: var(--muted); font-size: .78rem; }
.trust-row { display: flex; flex-wrap: wrap; gap: .6rem 1.2rem; margin: 1.25rem 0 0; color: var(--muted); font-size: .84rem; }
.trust-row span { display: inline-flex; align-items: center; gap: .4rem; }
.trust-row span::before { display: grid; place-items: center; width: 1.1rem; height: 1.1rem; border-radius: 50%; background: var(--mint); color: var(--teal-dark); content: "✓"; font-size: .7rem; font-weight: 900; }
.section { padding: clamp(3rem, 6vw, 5rem) 0; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 2rem; margin-bottom: 1.65rem; }
.section-heading-copy { max-width: 680px; }
.section h2, .split-callout h2 { margin: .2rem 0 .45rem; font-size: clamp(1.8rem, 3.4vw, 2.8rem); line-height: 1.08; letter-spacing: -.045em; }
.section-heading p:not(.eyebrow) { margin: 0; color: var(--muted); }
.guide-tools { display: grid; grid-template-columns: minmax(230px, 1fr) auto; align-items: center; gap: .8rem; margin: 1.4rem 0 1.2rem; }
.search-box { position: relative; }
.search-box input { width: 100%; min-height: 3rem; padding: .75rem 1rem .75rem 2.8rem; border: 1px solid var(--line); border-radius: .9rem; background: white; color: var(--ink); }
.search-box::before { position: absolute; top: .66rem; left: 1rem; color: var(--teal); content: "⌕"; font-size: 1.5rem; line-height: 1; }
.filter-row { display: flex; flex-wrap: wrap; gap: .45rem; }
.filter-button { min-height: 2.6rem; padding: .55rem .8rem; border: 1px solid var(--line); border-radius: 999px; background: white; color: var(--muted); cursor: pointer; font-size: .82rem; font-weight: 700; }
.filter-button[aria-pressed="true"] { border-color: var(--ink); background: var(--ink); color: white; }
.search-status { min-height: 1.4rem; margin: .25rem 0 .8rem; color: var(--muted); font-size: .82rem; }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1rem; }
.card { position: relative; display: flex; flex-direction: column; min-height: 225px; padding: 1.35rem; overflow: hidden; border: 1px solid var(--line); border-radius: 1.15rem; background: var(--white); box-shadow: 0 7px 24px rgba(18,37,43,.035); transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.card:hover { transform: translateY(-4px); border-color: #a9cbbd; box-shadow: var(--shadow); }
.card[hidden] { display: none; }
.card::after { position: absolute; top: -3rem; right: -3rem; width: 7rem; height: 7rem; border-radius: 50%; background: linear-gradient(140deg, rgba(217,243,121,.55), rgba(10,117,108,.08)); content: ""; }
.card-kicker { position: relative; z-index: 1; margin: 0 0 .55rem; color: var(--teal); font-size: .7rem; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.card h3 { position: relative; z-index: 1; margin: .1rem 0 .55rem; font-size: 1.22rem; line-height: 1.2; letter-spacing: -.025em; }
.card p:not(.card-kicker) { position: relative; z-index: 1; margin: 0 0 1.1rem; color: var(--muted); font-size: .94rem; }
.card a { position: relative; z-index: 1; display: inline-flex; align-items: center; gap: .35rem; margin-top: auto; color: var(--teal-dark); font-weight: 800; text-decoration: none; }
.card a span { transition: transform .18s ease; }
.card a:hover span { transform: translateX(3px); }
.method-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; counter-reset: method; }
.method-card { padding: 1.4rem; border: 1px solid rgba(255,255,255,.16); border-radius: 1rem; background: rgba(255,255,255,.07); }
.method-card::before { display: grid; place-items: center; width: 2.2rem; height: 2.2rem; margin-bottom: .9rem; border-radius: .7rem; background: var(--lime); color: var(--navy); content: counter(method, decimal-leading-zero); counter-increment: method; font-size: .75rem; font-weight: 900; }
.method-card h3 { margin: .1rem 0 .4rem; font-size: 1.08rem; }
.method-card p { margin: 0; color: #d0e2dc; font-size: .91rem; }
.split-callout { display: grid; grid-template-columns: minmax(0,1fr) minmax(280px,.8fr); gap: 2rem; align-items: center; margin: 2rem 0; padding: clamp(1.5rem, 4vw, 2.6rem); border-radius: 1.5rem; background: radial-gradient(circle at 92% 12%, rgba(217,243,121,.22), transparent 28%), linear-gradient(135deg, #102c33, #174d50); color: white; box-shadow: var(--shadow); }
.split-callout .eyebrow { color: var(--lime); }
.split-callout p:last-child { color: #d7e7e1; }
.split-callout .button.secondary { border: 0; }
.small-section { max-width: 850px; padding: 2rem 0 4rem; }
.small-section p { color: var(--muted); }
.faq-list { display: grid; gap: .65rem; margin-top: 1.2rem; }
.faq-list details { padding: 1rem 1.15rem; border: 1px solid var(--line); border-radius: .9rem; background: white; }
.faq-list summary { cursor: pointer; font-weight: 750; }
.faq-list details p { margin: .6rem 0 .1rem; color: var(--muted); }
.site-footer { display: grid; grid-template-columns: 1fr auto; gap: 1rem 2rem; margin-top: 2rem; padding: 2.8rem max(1rem, calc((100vw - 1280px)/2)); background: #eaf0ec; }
.footer-brand { font-size: 1.1rem; }
.site-footer p { margin: .35rem 0; color: var(--muted); }
.footer-links { display: grid; grid-template-columns: repeat(2, auto); gap: .5rem 1.25rem; align-content: start; }
.copyright { grid-column: 1/-1; padding-top: 1rem; border-top: 1px solid var(--line); font-size: .82rem; }
/* Editorial pages and calculators */
.article-wrap { max-width: 880px; margin: 0 auto; padding: 3.5rem 0 5rem; }
.article-wrap h1 { max-width: 820px; margin: .25rem 0 1rem; font-size: clamp(2.25rem, 5vw, 3.9rem); line-height: 1.03; letter-spacing: -.055em; }
.article-wrap h2 { margin: 2.2rem 0 .65rem; font-size: 1.55rem; line-height: 1.2; letter-spacing: -.025em; }
.article-wrap h3 { margin: 1.5rem 0 .35rem; font-size: 1.13rem; }
.article-wrap p, .article-wrap li { color: #364e54; }
.article-wrap ul, .article-wrap ol { padding-left: 1.3rem; }
.article-wrap li { margin: .5rem 0; }
.article-meta { color: var(--muted); font-size: .9rem; }
.notice { margin: 1.4rem 0; padding: 1.1rem 1.25rem; border: 1px solid #d0e8d7; border-left: 4px solid var(--teal); border-radius: .8rem; background: var(--mint); }
.notice p { margin: .2rem 0; }
.source-list { padding: 1.2rem 1.35rem; border: 1px solid var(--line); border-radius: .9rem; background: white; }
.source-list li { overflow-wrap: anywhere; }
.table-wrap { overflow-x: auto; margin: 1.2rem 0; border-radius: .8rem; }
table { width: 100%; border-collapse: collapse; background: white; }
th, td { padding: .8rem; border: 1px solid var(--line); text-align: left; vertical-align: top; }
th { background: #eaf0ec; color: var(--ink); }
.inline-cta { display: inline-flex; align-items: center; margin: .6rem 0; padding: .8rem 1rem; border-radius: .7rem; background: var(--teal); color: white; font-weight: 800; text-decoration: none; }
.inline-cta:hover { background: var(--teal-dark); color: white; }
.disclosure { padding: 1rem; border: 1px solid #e0c986; border-radius: .8rem; background: #fff8e8; }
.back-link { font-size: .9rem; font-weight: 750; text-decoration: none; }
.calculator { margin: 1rem 0; padding: clamp(1rem,3vw,1.5rem); border: 1px solid var(--line); border-radius: 1.1rem; background: white; box-shadow: 0 10px 30px rgba(18,37,43,.06); }
.form-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; }
.form-field { display: flex; flex-direction: column; gap: .35rem; min-width: 0; }
.form-field label { font-weight: 750; }
.form-field input, .form-field select { width: 100%; min-height: 2.9rem; padding: .65rem .75rem; border: 1px solid #bdcdc5; border-radius: .6rem; background: white; color: var(--ink); }
.field-hint { color: var(--muted); font-size: .8rem; }
.calc-button { margin-top: 1rem; cursor: pointer; }
.calc-error { padding: .7rem; border-radius: .5rem; background: #fff0e8; color: #7e2f17 !important; }
.calc-results { margin: 1rem 0; padding: 1rem; border-radius: 1rem; background: var(--mint); }
.result-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: .8rem; }
.audit-checklist { margin: 1rem 0; padding: 1.25rem; border: 1px solid var(--line); border-radius: .9rem; background: white; }
.audit-checklist-heading { margin-top: 0; }
.audit-checklist-footnote, .tool-notes { color: var(--muted); font-size: .86rem; }
.print-button { cursor: pointer; }
.video-guide-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 1rem; }
.video-guide-card { padding: 1.25rem; border: 1px solid var(--line); border-radius: 1rem; background: white; }
.video-number { color: var(--teal); font-weight: 850; }
.video-actions { display: flex; flex-wrap: wrap; gap: .7rem; }
@media (max-width: 1050px) {
  .site-header { grid-template-columns: auto 1fr; }
  .site-header nav { grid-row: 2; grid-column: 1/-1; justify-content: flex-start; overflow-x: auto; padding: .1rem 0 .3rem; scrollbar-width: thin; }
  .nav-cta { grid-row: 1; grid-column: 2; justify-self: end; }
  .hero { grid-template-columns: minmax(0,1fr) minmax(280px,.85fr); gap: 2rem; }
  .hero-art, .hero-art img { min-height: 350px; }
}
@media (max-width: 760px) {
  html { scroll-padding-top: 7.5rem; }
  .site-header { gap: .55rem; padding: .7rem 1rem .45rem; }
  .site-header nav { gap: 1rem; }
  .site-header nav a { font-size: .82rem; }
  .nav-cta { padding: .55rem .75rem; font-size: .78rem; }
  .hero { grid-template-columns: 1fr; gap: 1.5rem; padding: 3rem 0 2.8rem; }
  .hero::before { right: -1rem; width: 100vw; height: 100%; }
  .hero h1 { font-size: clamp(2.75rem, 12vw, 4.3rem); }
  .hero-art, .hero-art img { min-height: 280px; max-height: 370px; }
  .hero-float { right: .6rem; bottom: .6rem; max-width: 205px; }
  .section-heading { display: block; }
  .guide-tools { grid-template-columns: 1fr; }
  .card-grid, .method-grid { grid-template-columns: 1fr; }
  .card { min-height: auto; }
  .split-callout { grid-template-columns: 1fr; gap: .7rem; }
  .site-footer { grid-template-columns: 1fr; padding: 2rem 1rem; }
  .footer-links { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .copyright { grid-column: auto; }
  .article-wrap { padding: 2.4rem 0 3.5rem; }
  .form-grid, .result-grid, .video-guide-grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}
@media print {
  .site-header, .site-footer, .print-button, .actions, .nav-cta { display: none !important; }
  body { background: white; }
  .article-wrap { max-width: none; padding: 0; }
}

/* Friendly, bolder visual cues and a compact accessible phone menu. */
.menu-toggle{display:none;align-items:center;justify-content:center;gap:.42rem;min-height:2.5rem;padding:.48rem .72rem;border:1px solid var(--line);border-radius:999px;background:white;color:var(--ink);font-size:.8rem;font-weight:800;cursor:pointer}
#main-nav a[aria-current="page"]{color:var(--teal-dark);text-decoration:underline;text-decoration-color:var(--lime);text-decoration-thickness:3px;text-underline-offset:6px}
.brand-mark{position:relative;isolation:isolate;overflow:hidden;border-radius:.78rem .78rem .32rem .78rem;background:linear-gradient(145deg,#0a756c 0 48%,#12434b 49%);transition:transform .25s ease,box-shadow .25s ease}
.brand:hover .brand-mark{transform:rotate(-5deg) scale(1.04);box-shadow:0 9px 18px rgba(10,117,108,.28)}
.hero-art{border:2px solid rgba(255,255,255,.8);box-shadow:0 30px 75px rgba(18,37,43,.19);transform:rotate(.5deg)}
.hero-art img{transition:transform .6s cubic-bezier(.2,.7,.2,1),filter .6s ease}
.hero-art:hover img{transform:scale(1.025);filter:saturate(1.05)}
.hero-float{border-radius:1.1rem 1.1rem 1.1rem .25rem}
.hero-float::before{display:inline-grid;place-items:center;width:1.5rem;height:1.5rem;margin-bottom:.45rem;border-radius:.55rem;background:var(--lime);color:var(--navy);content:"✦";font-size:.8rem}
.trust-row span{padding:.28rem .6rem .28rem .25rem;border:1px solid rgba(10,117,108,.12);border-radius:999px;background:rgba(255,255,255,.6)}
.card{border-radius:1.25rem;background:linear-gradient(155deg,#fff 4%,#fbfdfa 100%)}
.card-kicker{display:inline-flex;align-items:center;gap:.45rem;width:max-content;max-width:100%;padding:.28rem .55rem;border:1px solid rgba(10,117,108,.14);border-radius:999px;background:#f0f8f2}
.card-kicker::before{display:grid;place-items:center;width:1.15rem;height:1.15rem;border-radius:50%;background:var(--lime);color:var(--navy);content:"✦";font-size:.72rem;letter-spacing:0}
.card[data-topic="internet"] .card-kicker::before{content:"↗"}.card[data-topic="energy"] .card-kicker::before{content:"☼"}.card[data-topic="mobile"] .card-kicker::before{content:"⌁"}.card[data-topic="subscriptions"] .card-kicker::before{content:"◷"}
.card:hover{transform:translateY(-6px) scale(1.008)}
.filter-button{transition:transform .15s ease,background .15s ease,color .15s ease,box-shadow .15s ease}
.filter-button:hover{transform:translateY(-2px);box-shadow:0 6px 16px rgba(18,37,43,.1)}
.faq-list details[open]{border-color:#9fc6b8;box-shadow:0 8px 22px rgba(18,37,43,.06)}
@media(max-width:760px){
 .site-header{grid-template-columns:minmax(0,1fr) auto auto;gap:.45rem;padding:.7rem .8rem .55rem}
 .menu-toggle{display:inline-flex;grid-row:1;grid-column:2}
 .site-header nav{display:none;position:absolute;top:calc(100% - 1px);left:0;right:0;z-index:9;grid-row:auto;grid-column:1/-1;flex-direction:column;align-items:stretch;gap:0;max-height:min(70vh,30rem);overflow:auto;padding:.4rem 1rem 1rem;border:1px solid var(--line);border-radius:0 0 1rem 1rem;background:rgba(255,255,255,.98);box-shadow:0 16px 30px rgba(18,37,43,.13);backdrop-filter:blur(16px)}
 .site-header nav.open{display:flex}
 .site-header nav a{padding:.75rem .45rem;border-bottom:1px solid #edf1ed;font-size:.92rem}
 .nav-cta{grid-row:1;grid-column:3;justify-self:end}
}
@media(max-width:390px){.brand{gap:.42rem;font-size:.91rem}.brand-mark{width:2.1rem;height:2.1rem}.nav-cta{font-size:.7rem;padding:.48rem .56rem}.menu-toggle{font-size:.73rem;padding:.42rem .55rem}}
@media(prefers-reduced-motion:reduce){.hero-art img,.brand-mark,.card,.filter-button{transition:none}}