:root{
  --bg:#f4f6f9; --surface:#ffffff; --ink:#12263f; --muted:#56667b; --line:#d8dfe8;
  --accent:#0b6e6d; --accent-soft:#e1f0ef; --band:#0e7c7b; --band-ink:#ffffff; --band-soft:#dceeed;
  --good:#2f7a3d; --warn:#a1580b; --warn-soft:#fbead5; --error:#b3261e;
  --logo-navy:#12263f; --logo-teal:#0e7c7b;
  --display:"Young Serif",Georgia,serif; --body:"Public Sans",system-ui,-apple-system,sans-serif; --mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0e1622; --surface:#152131; --ink:#e6edf5; --muted:#97a6b8; --line:#27354a;
  --accent:#5cc4bf; --accent-soft:#163037; --band:#5cc4bf; --band-ink:#0e1622; --band-soft:#17323a;
  --good:#7ccf8a; --warn:#f0a85a; --warn-soft:#3a2a17; --error:#ff8a80; --logo-navy:#e6edf5; --logo-teal:#5cc4bf; color-scheme:dark}
  .brand img,.print-brand img{background:#fff;border-radius:8px;padding:2px}}

*{box-sizing:border-box}
[hidden]{display:none !important}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.6}
img{max-width:100%}
a{color:var(--band)}
h1,h2,h3{font-family:var(--display);font-weight:400;text-wrap:balance;margin:0;line-height:1.15}
h1{font-size:clamp(2rem,6vw,3.2rem)}
h2{font-size:clamp(1.5rem,4vw,2.1rem)}
h3{font-size:1.2rem}
p{margin:0}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}
.eyebrow{font-size:.75rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:600}
.lede{color:var(--muted);font-size:1.1rem;max-width:62ch}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}
.narrow{max-width:760px}
section{padding:56px 0}
.stack{display:flex;flex-direction:column;gap:18px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* Header */
.site-header{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;height:60px}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--display);font-size:1.15rem;color:var(--logo-navy);text-decoration:none;white-space:nowrap}
.brand img{flex:none;display:block;width:34px;height:34px}
.brand span{color:var(--logo-teal)}
.brand img.brand-badge,.print-brand img.brand-badge{width:.92em;height:.92em;margin-left:-3px;background:none;padding:0;border-radius:50%}
.print-brand{display:none;align-items:center;gap:10px;font-family:var(--display);font-size:1.1rem;color:var(--logo-navy)}
.print-brand img{width:40px;height:40px}
.print-brand span{color:var(--logo-teal)}
.site-nav{display:flex;gap:20px;font-size:.9rem}
.site-nav a{color:var(--muted);text-decoration:none}
.site-nav a:not(.btn){white-space:nowrap}
.site-nav a:hover{color:var(--ink)}
.site-nav a.btn,.site-nav a.btn:hover{color:var(--band-ink)}
.site-nav a.btn{white-space:nowrap}
/* Header buttons: one line, about the height of the "Challenge Mansion Tax" title, centred with it. */
.site-header .site-nav a.btn{font-size:.8rem;line-height:1.2;padding:5px 12px;align-self:center}
.site-nav a.btn.ghost,.site-nav a.btn.ghost:hover{color:var(--band)}
@media (max-width:1200px){.site-nav a.nav-consult{display:none}}
@media (max-width:480px){.site-header .wrap{gap:8px}.brand{font-size:1rem;gap:6px}.brand img.brand-badge{margin-left:0}.brand img{width:28px;height:28px}.site-header .site-nav a.btn.small{padding:4px 10px;font-size:.76rem;line-height:1.2;white-space:nowrap}}
@media (max-width:360px){.site-header .wrap{gap:6px}.brand{font-size:.86rem;gap:5px}.brand img{width:24px;height:24px}.site-header .site-nav a.btn.small{padding:4px 8px;font-size:.72rem}}
@media (max-width:960px){.site-nav a:not(.btn){display:none}}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:600 .95rem var(--body);padding:12px 20px;border-radius:8px;border:1.5px solid var(--band);background:var(--band);color:var(--band-ink);text-decoration:none;cursor:pointer}
.btn:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent;color:var(--band)}
.btn.small{padding:8px 14px;font-size:.85rem}
@media (min-width:601px){.btn{white-space:nowrap}}
.btn[disabled]{opacity:.6;cursor:wait}

/* Hero */
.hero{padding:64px 0 40px}
.hero .stack{gap:22px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:12px}
@media (max-width:720px){.facts{grid-template-columns:1fr 1fr}}
.fact{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:14px 16px;display:flex;flex-direction:column;gap:2px}
.fact b{font-family:var(--mono);font-weight:500;font-size:1.25rem}
.fact span{font-size:.82rem;color:var(--muted)}

/* Panels */
.panel{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:22px;display:flex;flex-direction:column;gap:14px;min-width:0}
.calc-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;align-items:start}
@media (max-width:860px){.calc-grid{grid-template-columns:1fr}}
label{font-weight:600;font-size:.9rem}
.field{display:flex;flex-direction:column;gap:6px}
.money{display:flex;align-items:center;border:1.5px solid var(--line);border-radius:8px;background:var(--bg);padding:0 12px}
.money:focus-within{border-color:var(--band)}
.money span{font-family:var(--mono);color:var(--muted);font-size:1.3rem}
.money input{border:0;background:transparent;color:var(--ink);font-family:var(--mono);font-size:1.6rem;padding:10px 8px;width:100%;outline:none;min-width:0}
input[type=range]{width:100%;accent-color:var(--band)}
.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:560px){.row{grid-template-columns:1fr}}
.input,select.input{font:inherit;font-size:.95rem;padding:10px 12px;border:1.5px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink);width:100%}
.input:focus{border-color:var(--band);outline:none}
.hint{font-size:.82rem;color:var(--muted)}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:400;font-size:.88rem}
.check{cursor:pointer;padding:6px 0}
.check input{width:22px;height:22px;margin:0;accent-color:var(--band);flex:none;cursor:pointer}

.verdict{background:var(--band);color:var(--band-ink);border:0}
.verdict .eyebrow{color:inherit;opacity:.8}
.big{font-family:var(--display);font-size:clamp(2.6rem,9vw,3.6rem);line-height:1}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media (max-width:560px){.stats{grid-template-columns:1fr 1fr}}
.stat{display:flex;flex-direction:column;gap:2px}
.stat b{font-family:var(--mono);font-size:1.05rem;font-weight:500}
.stat span{font-size:.75rem;opacity:.85}
.chart{width:100%;height:auto;display:block}

.lens{border-left:4px solid var(--accent);background:var(--accent-soft);border-radius:0 10px 10px 0;padding:16px 18px;display:flex;flex-direction:column;gap:8px}
.lens.warn{border-color:var(--warn);background:var(--warn-soft)}
.lens strong{font-family:var(--mono);font-weight:500}

.tablewrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{text-align:right;padding:8px 6px;border-bottom:1px solid var(--line)}
th:first-child,td:first-child{text-align:left}
th{font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);font-weight:600}
tfoot td{font-weight:700;border-bottom:0}

/* Signup */
.signup{border:2px solid var(--accent)}
.signup .guide-title{font-family:var(--display);font-size:1.35rem}
.signup ul{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:4px;font-size:.92rem}
.form-msg{font-size:.88rem}
.form-msg.error{color:var(--error)}

/* Steps, timeline, FAQ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:760px){.steps{grid-template-columns:1fr}}
.step{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:20px;display:flex;flex-direction:column;gap:8px}
.step .n{font-family:var(--mono);color:var(--accent);font-size:.85rem}
.cliff{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:560px){.cliff{grid-template-columns:1fr}}
.cliff div{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:16px;display:flex;flex-direction:column;gap:4px}
.cliff b{font-family:var(--mono);font-weight:500;font-size:1.3rem}
.cliff-lines{display:flex;flex-direction:column;gap:14px}
.cliff-line{display:flex;flex-direction:column;gap:6px}
.cliff.small{grid-template-columns:1fr 1fr}
.cliff.small div{padding:12px 14px}
.cliff.small b{font-size:1.1rem}
@media (max-width:560px){.cliff.small b{font-size:.98rem}.cliff.small .hint{font-size:.75rem}}
.timeline{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:0;border-left:2px solid var(--line);margin-left:6px}
.timeline li{position:relative;padding:0 0 22px 22px}
.timeline li::before{content:"";position:absolute;left:-7px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--band)}
.timeline b{display:block;font-family:var(--mono);font-weight:500}
details{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:14px 18px}
details+details{margin-top:10px}
summary{cursor:pointer;font-weight:600}
details p{margin-top:10px;color:var(--muted)}
ul.rules{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:6px}

/* Footer */
.site-footer{border-top:1px solid var(--line);padding:32px 0 48px;font-size:.82rem;color:var(--muted)}
.site-footer .wrap{display:flex;flex-direction:column;gap:10px}
.site-footer nav{display:flex;flex-wrap:wrap;gap:16px}

/* Plain pages */
.prose{display:flex;flex-direction:column;gap:14px}
.prose h2{font-size:1.35rem;margin-top:14px}
.prose ul{margin:0;padding-left:20px}
.todo{background:var(--warn-soft);padding:0 4px;border-radius:4px}

/* Checker */
.tabs{display:flex;gap:4px;border-bottom:1.5px solid var(--line)}
.tab{font:600 .95rem var(--body);color:var(--muted);background:none;border:0;border-bottom:3px solid transparent;margin-bottom:-1.5px;padding:12px 16px;cursor:pointer;flex:0 1 auto}
.tab[aria-selected=true]{color:var(--ink);border-bottom-color:var(--accent)}
.tab:hover{color:var(--ink)}
@media (max-width:480px){.tab{flex:1;padding:12px 8px}}
.inline{display:flex;gap:8px;align-items:stretch}
.inline .input{min-width:0}
fieldset.field{border:0;margin:0;padding:0;min-width:0}
legend{font-weight:600;font-size:.9rem;padding:0;margin-bottom:6px}
.seg{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
@media (max-width:420px){.seg{grid-template-columns:1fr 1fr}}
.seg label{position:relative;font-weight:500}
.seg input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.seg span{display:block;text-align:center;padding:10px 6px;border:1.5px solid var(--line);border-radius:8px;background:var(--bg);font-size:.92rem;cursor:pointer}
.seg input:checked+span{border-color:var(--band);background:var(--band-soft);color:var(--ink);font-weight:600}
.seg input:focus-visible+span{outline:2px solid var(--accent);outline-offset:2px}
details.more{background:transparent;border:1px dashed var(--line);padding:10px 14px}
details.more summary{font-size:.9rem}
.verdict .range{font-size:clamp(2.2rem,8vw,3.2rem)}
.verdict-text{font-size:1.05rem}
.verdict .small,.small{font-size:.8rem;opacity:.85}
.verdict.muted-verdict{background:var(--surface);color:var(--ink);border:1px solid var(--line)}
.btn.light{background:var(--band-ink);color:var(--band);border-color:var(--band-ink)}
.verdict .next-steps{margin-top:16px;padding-top:16px;border-top:1px solid color-mix(in srgb,currentColor 30%,transparent)}
.verdict .next-steps a:not(.btn){color:inherit}
.muted-verdict .btn.light{background:var(--band);color:var(--band-ink)}
.lead-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:24px;align-items:start}
@media (max-width:860px){.lead-grid{grid-template-columns:1fr}}
ol.rules{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:6px}

/* Report */
.report-head{display:flex;flex-direction:column;gap:6px}
.report td.addr{white-space:normal;min-width:180px}
.report th,.report td{white-space:nowrap}
@media print{.site-header,.no-print{display:none}.print-brand{display:flex;margin-bottom:8px}.panel{break-inside:avoid}}
.inline select.input{flex:none;width:auto;min-width:84px}

/* Risk of being in a different tier */
.risk{border-radius:10px;padding:16px 18px;display:flex;flex-direction:column;gap:6px;border:1.5px solid var(--line);background:var(--surface)}
.risk-high{border-color:var(--error);background:color-mix(in srgb,var(--error) 8%,var(--surface))}
.risk-medium{border-color:var(--warn);background:var(--warn-soft)}
.risk-badge{align-self:flex-start;font:700 .72rem var(--body);letter-spacing:.08em;text-transform:uppercase;padding:3px 9px;border-radius:99px;background:var(--line);color:var(--ink)}
.risk-high .risk-badge{background:var(--error);color:#fff}
.risk-medium .risk-badge{background:var(--warn);color:#fff}
.risk-title{font-weight:700}
.rangebar{position:relative;height:56px;margin:8px 4px 0;border-top:6px solid var(--line);top:18px}
.rb-range{position:absolute;top:-6px;height:6px;background:var(--band);border-radius:3px}
.risk-high .rb-range{background:var(--error)}
.rb-line{position:absolute;top:-16px;height:24px;border-left:2px dashed var(--ink)}
.rb-line span{position:absolute;top:-18px;left:-20px;width:40px;text-align:center;font:600 .72rem var(--mono)}
.rb-end{position:absolute;top:6px;transform:translateX(-50%);font:.72rem var(--mono);color:var(--muted);white-space:nowrap}
.verdict .stat a{color:inherit}
details.why{background:transparent;border:0;padding:0;margin-top:2px}
details.why summary{font-weight:500;font-size:.82rem;color:var(--band)}
details.why p{font-size:.82rem;margin-top:6px}
.rb-evidence{position:absolute;top:-6px;height:6px;background:color-mix(in srgb,var(--band) 35%,transparent);border-radius:3px}
.risk-high .rb-evidence{background:color-mix(in srgb,var(--error) 30%,transparent)}

/* Prime London price trend chart */
.trend-root{--series-1:#2a78d6;--series-2:#eb6834;--series-3:#1baf7a;--series-4:#eda100;--series-5:#e87ba4;--series-6:#008300;--series-7:#6250d6;--series-8:#e34948;position:relative}
@media (prefers-color-scheme:dark){.trend-root{--series-1:#3987e5;--series-2:#d95926;--series-3:#199e70;--series-4:#c98500;--series-5:#d55181;--series-6:#008300;--series-7:#9085e9;--series-8:#e66767}}
.trend-chips{display:flex;flex-wrap:wrap;gap:6px}
.trend-chip{display:inline-flex;align-items:center;gap:6px;font:500 .8rem var(--body);padding:6px 10px;border-radius:99px;border:1.5px solid var(--line);background:var(--surface);color:var(--muted);cursor:pointer}
.trend-chip[aria-pressed=true]{color:var(--ink);border-color:var(--ink)}
.trend-key{width:14px;height:2px;border-radius:1px;background:var(--chip);opacity:.35}
.trend-chip[aria-pressed=true] .trend-key{opacity:1;height:3px}
.trend-chart{width:100%;height:auto;display:block;overflow:visible}
.trend-grid{stroke:var(--line);stroke-width:1}
.trend-axis{font:11px var(--mono);fill:var(--muted)}
.trend-line{fill:none;stroke-width:2;stroke-linejoin:round;stroke-linecap:round}
.trend-dot{stroke:var(--surface);stroke-width:2}
.trend-label{font:600 11px var(--body);fill:var(--ink)}
.trend-leader{stroke-width:1;opacity:.6}
.trend-hair{stroke:var(--muted);stroke-width:1;stroke-dasharray:3 3}
.trend-tip{position:absolute;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:8px 10px;box-shadow:0 4px 14px rgba(0,0,0,.12);font-size:.8rem;pointer-events:none;z-index:2}
.trend-tip-q{font-weight:700;margin-bottom:4px}
.trend-tip-row{display:flex;align-items:center;gap:6px;white-space:nowrap}
.trend-tip-row b{font-family:var(--mono);font-weight:500}
.trend-tip-row span:last-child{color:var(--muted);overflow:hidden;text-overflow:ellipsis}
.trend-tip-key{width:12px;height:2px;flex:none;border-radius:1px}
.trend-table{font-size:.78rem}
.trend-table th,.trend-table td{white-space:nowrap}
@media (max-width:600px){.trend-label{font-size:10px}}
.trend-label-name{font-weight:400;fill:var(--muted)}

/* London price index page */
.lx-base{stroke:var(--muted);stroke-width:1}
.lx-big{font-family:var(--mono);font-weight:500;font-size:1.4rem}
.trend-table tr.lx-hl td{font-weight:700;background:var(--accent-soft)}

/* Sample Evidence Pack request */
.sample-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:16px;align-items:start}
@media (max-width:820px){.sample-grid{grid-template-columns:1fr}}
.sample-teaser{width:100%;height:auto;border:1px solid var(--line);border-radius:8px;display:block}
.ticks{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:6px}
.note-box{background:var(--accent-soft);border-left:4px solid var(--accent);padding:10px 12px;border-radius:0 6px 6px 0;font-size:.9rem}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:520px){.row2{grid-template-columns:1fr}}

/* Services and fees */
.offer-banner{background:var(--accent-soft);border-left:4px solid var(--accent);padding:12px 16px;border-radius:0 8px 8px 0}
.svc-grid{display:grid;grid-template-columns:1fr 1.25fr 1fr;gap:16px;align-items:start}
@media (max-width:900px){.svc-grid{grid-template-columns:1fr}}
.svc h2{font-size:1.3rem;margin:0}
.svc-main{border:2px solid var(--band)}
.svc-price{font-family:var(--mono);font-size:1.6rem;margin:0}
.svc-price s{color:var(--muted);font-size:1.1rem;margin-right:6px}
.svc-price .hint{font-family:var(--body);font-size:.8rem;display:block}
table.fees{font-size:.9rem}
table.fees td,table.fees th{vertical-align:top;text-align:left}
/* Phone and tablet menu (assets/nav.js): a Menu button that opens the links hidden below 960px. */
.nav-toggle,.nav-panel{display:none}
@media (max-width:960px){
  .site-nav{gap:8px;align-items:center}
  .nav-toggle{display:inline-flex;align-items:center;gap:6px;font:inherit;font-size:.8rem;font-weight:600;line-height:1.2;color:var(--ink);background:none;border:1px solid var(--line);border-radius:999px;padding:5px 10px;cursor:pointer;white-space:nowrap}
  .nav-bars,.nav-bars::before,.nav-bars::after{display:block;width:14px;height:2px;border-radius:1px;background:currentColor}
  .nav-bars{position:relative}
  .nav-bars::before,.nav-bars::after{content:"";position:absolute;left:0}
  .nav-bars::before{top:-4px}.nav-bars::after{top:4px}
  .site-header.menu-open .nav-bars{background:transparent}
  .site-header.menu-open .nav-bars::before{top:0;transform:rotate(45deg)}
  .site-header.menu-open .nav-bars::after{top:0;transform:rotate(-45deg)}
  .site-header.menu-open .nav-panel{display:flex;flex-direction:column;border-top:1px solid var(--line);background:var(--bg);padding:6px 16px 12px}
  .nav-panel a{color:var(--ink);text-decoration:none;font-size:1rem;padding:12px 4px;border-bottom:1px solid var(--line)}
  .nav-panel a:last-child{border-bottom:0}
}
@media (max-width:480px){
  .nav-toggle{font-size:0;gap:0;width:32px;height:30px;padding:0;justify-content:center;flex:none}
  .site-nav{gap:6px}
}
@media (max-width:400px){.brand img.brand-badge{display:none}}

/* Short email-only news sign-up (assets/news-signup.js) */
.news-signup .guide-title{margin:0}
.news-signup p{margin:0}
.news-form{display:flex;flex-direction:column;gap:10px}
.news-row{display:flex;gap:10px;flex-wrap:wrap}
.news-row .input{flex:1 1 220px}
.news-row .btn{flex:0 0 auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
/* Area pages: key figures */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.stat-grid .panel{gap:4px;padding:16px}
.stat-grid b{font-family:var(--display);font-size:1.6rem}
.stat-grid span{font-size:.85rem;color:var(--muted)}

/* Boxes still to fill in (assets/field-check.js) */
.input.invalid,input.invalid,select.invalid,textarea.invalid{border-color:var(--error);box-shadow:0 0 0 1px var(--error)}
.input.invalid:focus{border-color:var(--error)}
.check.invalid{color:var(--error)}
.check input.invalid{outline:2px solid var(--error);outline-offset:2px}

/* Cookie banner (consent.js): Accept and Reject equally prominent */
.cookie-banner{position:fixed;left:16px;right:16px;bottom:16px;z-index:1000;max-width:560px;margin:0 auto;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:12px;box-shadow:0 8px 28px rgba(18,38,63,.18);padding:14px 16px;font-size:.92rem;line-height:1.5}
.cookie-banner p{margin:0 0 10px}
.cookie-actions{display:flex;gap:10px}
.cookie-actions .btn{flex:1;justify-content:center}
.cookie-settings-line{margin-top:8px;font-size:.85rem}
.timeline .tl-label{display:block;font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);font-weight:600;margin:2px 0 4px}

/* Facebook link at the top of every footer */
.site-footer .social-links{margin:0 0 14px}
.social-btn{display:inline-flex;align-items:center;gap:8px;padding:7px 14px 7px 8px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--ink);font-weight:600;font-size:.92rem;text-decoration:none}
.social-btn:hover{border-color:#0866FF}
.social-btn .fb-icon{flex:none;display:block}