/* Stone & Brick London. Written for this site only.
   Look: "Mayfair" — midnight navy, brass rules, Portland-stone cream paper, hairline borders,
   Cormorant Garamond headings with Jost body (a nod to Johnston, the Underground face). */
:root {
  --navy: #0b1f3a;
  --navy-2: #142c4f;
  --ink: #1c1a16;
  --mute: #5c574e;
  --stone: #f4f1ea;
  --stone-2: #ebe6db;
  --line: #d9d2c3;
  --brass: #c9a24a;
  --brass-d: #a9842f;
  --brass-l: #e6cf8f;
  --white: #fffdf8;
  --todo-bg: #ffe2e2;
  --todo-ink: #8a1111;
  --serif: "Cormorant Garamond", "Iowan Old Style", Georgia, serif;
  --sans: "Jost", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; font: 400 17.5px/1.7 var(--sans); color: var(--ink); background: var(--stone); overflow-x: hidden; }
a { color: var(--navy); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--brass-d); }
:focus-visible { outline: 2px solid var(--brass); outline-offset: 3px; }
img, svg { max-width: 100%; }
p { margin: 0 0 16px; }
ul, ol { padding-left: 1.25em; }
li { margin-bottom: 7px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; color: var(--navy); line-height: 1.12; letter-spacing: .005em; }
h1 { font-size: clamp(38px, 6vw, 64px); margin: 0 0 18px; }
h2 { font-size: clamp(28px, 3.6vw, 40px); margin: 0 0 16px; }
h3 { font-size: 23px; margin: 26px 0 8px; }
.ic { width: 22px; height: 22px; flex: 0 0 auto; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; vertical-align: -5px; }
.measure { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.overline-label { font-family: var(--sans); font-weight: 500; font-size: 12.5px; letter-spacing: .22em; text-transform: uppercase; color: var(--brass-d); margin: 0 0 12px; }
.overline-label::before { content: ""; display: inline-block; width: 28px; height: 1px; background: var(--brass); vertical-align: middle; margin-right: 12px; }
.intro-line { font-size: 20px; line-height: 1.6; color: var(--ink); max-width: 62ch; }
.margin-note { font-size: 15px; color: var(--mute); }
.todo { background: var(--todo-bg); color: var(--todo-ink); font-weight: 500; padding: 0 5px; border-radius: 2px; }
.jump-link { position: absolute; left: -999px; top: 8px; background: var(--navy); color: #fff; padding: 8px 12px; z-index: 50; }
.jump-link:focus { left: 8px; }

/* identity strip */

/* masthead */
.portico { background: var(--white); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 30; }
.masthead-row { display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 76px; flex-wrap: wrap; }
.keystone { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--navy); }
.keystone-mark { width: 46px; height: 46px; }
.keystone-text { display: flex; flex-direction: column; line-height: 1; }
.keystone-title { font-family: var(--serif); font-weight: 700; font-size: 26px; letter-spacing: .01em; }
.keystone-place { font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--brass-d); margin-top: 4px; }
.nav-trigger { display: inline-flex; align-items: center; gap: 8px; background: none; border: 1px solid var(--line); border-radius: 999px; padding: 8px 14px; font: 500 14px var(--sans); color: var(--navy); cursor: pointer; }
.nav { flex-basis: 100%; display: none; }
.nav.nav-shown { display: block; }
.nav ul { list-style: none; margin: 0; padding: 8px 0 14px; display: flex; flex-direction: column; gap: 2px; }
.nav li { margin: 0; }
.nav a { display: block; padding: 9px 4px; text-decoration: none; font-weight: 500; font-size: 15.5px; letter-spacing: .02em; border-bottom: 1px solid var(--stone-2); }
.nav a[aria-current="page"] { color: var(--brass-d); }
.nav-go a { color: var(--navy); font-weight: 600; }
@media (min-width: 1040px) {
  .nav-trigger { display: none; }
  .masthead-row { min-height: 0; padding-top: 14px; }
  .nav { display: block; flex-basis: 100%; border-top: 1px solid var(--stone-2); margin-top: 10px; }
  .nav ul { flex-direction: row; align-items: center; justify-content: center; gap: 0; padding: 4px 0; }
  .nav a { padding: 10px 11px; font-size: 14px; border: 0; position: relative; white-space: nowrap; }
  .nav a::after { content: ""; position: absolute; left: 10px; right: 10px; bottom: 2px; height: 1px; background: var(--brass); transform: scaleX(0); transition: transform .2s; transform-origin: left; }
  .nav a:hover::after, .nav a[aria-current="page"]::after { transform: scaleX(1); }
  .nav-go a { margin-left: 10px; border: 1px solid var(--brass) !important; border-radius: 999px; padding: 8px 16px !important; display: inline-flex; align-items: center; gap: 8px; }
  .nav-go a::after { display: none; }
}

/* hero */
.opening { position: relative; background: var(--navy); color: #e9e6df; padding: 64px 0 150px; overflow: hidden; }
.opening::before { content: ""; position: absolute; inset: 0; background: radial-gradient(1100px 500px at 15% -10%, rgba(201,162,74,.18), transparent 60%); pointer-events: none; }
.opening .measure { position: relative; max-width: 900px; }
.opening .overline-label { color: var(--brass-l); }
.opening .overline-label::before { background: var(--brass-l); }
.opening h1 { color: #fff; }
.opening .intro-line { color: #d8d4ca; }
.hero-big { padding-top: 84px; }
.hero-big h1 { font-size: clamp(44px, 7vw, 78px); font-weight: 500; }
.hero-big h1::first-letter { color: var(--brass-l); }
.skyline { position: absolute; left: 0; right: 0; bottom: -2px; width: 100%; height: 130px; opacity: .9; }
.btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.brass-button { display: inline-flex; align-items: center; gap: 10px; background: var(--brass); color: var(--navy); font-weight: 600; font-size: 15.5px; letter-spacing: .03em; text-decoration: none; padding: 14px 24px; border-radius: 999px; border: 1px solid var(--brass); transition: background .15s, transform .15s; }
.brass-button:hover { background: var(--brass-l); color: var(--navy); transform: translateY(-1px); }
.brass-button.outline-button { background: transparent; color: #fff; border-color: rgba(255,255,255,.5); }
.brass-button.outline-button:hover { border-color: #fff; background: rgba(255,255,255,.06); color: #fff; }
button.brass-button { font-family: var(--sans); cursor: pointer; }

/* bands */
.terrace-band { padding: 64px 0; }
.band-alt { background: var(--white); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.intro-grid { display: grid; gap: 40px; grid-template-columns: 1fr; align-items: start; }
@media (min-width: 860px) { .intro-grid { grid-template-columns: 1.2fr .8fr; } }
.facts { display: grid; gap: 0; border-top: 1px solid var(--brass); }
.fact { display: grid; grid-template-columns: 110px 1fr; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); align-items: start; }
.fact-n { font-family: var(--serif); font-size: 34px; font-weight: 600; color: var(--navy); line-height: 1; }
.fact-t { font-size: 15px; color: var(--mute); line-height: 1.55; }

/* cards */
.stone-panels { display: grid; gap: 18px; grid-template-columns: 1fr; margin-top: 22px; }
@media (min-width: 700px) { .stone-panels { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1040px) { .stone-panels { grid-template-columns: repeat(4, 1fr); } }
.stone-panel { display: flex; flex-direction: column; background: var(--stone); border: 1px solid var(--line); padding: 26px 22px 22px; text-decoration: none; color: var(--ink); position: relative; transition: border-color .15s, transform .15s; }
.stone-panel::before { content: ""; position: absolute; top: 0; left: 22px; right: 22px; height: 2px; background: var(--brass); transform: scaleX(.35); transform-origin: left; transition: transform .25s; }
.stone-panel:hover { border-color: var(--brass); transform: translateY(-2px); }
.stone-panel:hover::before { transform: scaleX(1); }
.card-ic { color: var(--brass-d); margin-bottom: 14px; }
.card-ic .ic { width: 30px; height: 30px; }
.stone-panel h3 { margin: 0 0 8px; font-size: 24px; }
.stone-panel p { font-size: 15px; color: var(--mute); flex: 1; }
.card-go { font-size: 13.5px; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; color: var(--navy); display: inline-flex; align-items: center; gap: 6px; }

/* steps */
.visit-steps { list-style: none; padding: 0; margin: 24px 0 18px; display: grid; gap: 22px; grid-template-columns: 1fr; counter-reset: s; }
@media (min-width: 760px) { .visit-steps { grid-template-columns: repeat(3, 1fr); } }
.visit-steps li { position: relative; padding: 22px 0 0; border-top: 1px solid var(--brass); }
.visit-steps .n { font-family: var(--serif); font-size: 44px; color: var(--brass); line-height: 1; display: block; margin-bottom: 6px; }
.visit-steps h3 { margin: 0 0 6px; font-size: 22px; }
.visit-steps p { font-size: 15.5px; color: var(--mute); margin: 0; }
.split { display: grid; gap: 40px; grid-template-columns: 1fr; }
@media (min-width: 860px) { .split { grid-template-columns: 1fr 1fr; } .split > div + div { border-left: 1px solid var(--line); padding-left: 40px; } }

/* closing */
.close { background: var(--navy); color: #e4e0d6; padding: 70px 0; text-align: center; border-top: 2px solid var(--brass); }
.close h2 { color: #fff; }
.close p { max-width: 58ch; margin: 0 auto 24px; color: #cfcbc0; }

/* two column inner pages */
.two { display: grid; gap: 40px; grid-template-columns: 1fr; }
@media (min-width: 940px) { .two { grid-template-columns: minmax(0, 1fr) 300px; } }
.two-main > h2:first-child { margin-top: 0; }
.two-main h2 { margin-top: 38px; }
.two-main p, .two-main li { max-width: 68ch; }
.two-aside { position: relative; }
@media (min-width: 940px) { .two-aside > * { position: sticky; top: 96px; } .two-aside > * + * { position: static; } }
.aside-box { background: var(--white); border: 1px solid var(--line); border-top: 2px solid var(--brass); padding: 20px 22px 14px; margin-bottom: 18px; }
.aside-h { font-size: 12.5px; letter-spacing: .2em; text-transform: uppercase; color: var(--brass-d); font-weight: 500; margin: 0 0 10px; }
.aside-box ul { list-style: none; padding: 0; margin: 0; }
.aside-box li { font-size: 15px; padding: 7px 0; border-bottom: 1px solid var(--stone-2); margin: 0; }
.aside-box li:last-child { border: 0; }
.brass-callout { background: var(--white); border: 1px solid var(--line); border-left: 3px solid var(--brass); padding: 20px 24px 8px; margin: 26px 0; }
.brass-callout h3 { margin-top: 0; }
.tick-list { list-style: none; padding: 0; }
.tick-list li { display: flex; gap: 10px; align-items: flex-start; }
.tick-list .ic { color: var(--brass-d); margin-top: 4px; }
.numbered { padding-left: 0; list-style: none; counter-reset: n; }
.numbered li { counter-increment: n; position: relative; padding-left: 44px; margin-bottom: 12px; }
.numbered li::before { content: counter(n); position: absolute; left: 0; top: 0; width: 30px; height: 30px; border: 1px solid var(--brass); border-radius: 50%; display: grid; place-items: center; font-family: var(--serif); font-weight: 600; color: var(--navy); font-size: 17px; }
.numbered.fine-print li { padding-left: 36px; font-size: 15px; }
.numbered.fine-print li::before { width: 24px; height: 24px; font-size: 14px; }
.sources { margin-top: 44px; padding-top: 18px; border-top: 1px solid var(--brass); }
.sources-h { font-size: 12.5px; letter-spacing: .2em; text-transform: uppercase; color: var(--brass-d); font-weight: 500; margin-bottom: 10px; }
.sources ul { font-size: 14px; color: var(--mute); }
.sources-note { font-size: 13.5px; color: var(--mute); }

/* areas */
.areas { display: grid; gap: 22px; grid-template-columns: 1fr; margin: 26px 0 36px; }
@media (min-width: 640px) { .areas { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .areas { grid-template-columns: repeat(5, 1fr); } }
.area-group { border-top: 1px solid var(--brass); padding-top: 12px; }
.area-group h3 { margin: 0 0 6px; }
.area-group ul { list-style: none; padding: 0; margin: 0; }
.area-group li { font-size: 15px; padding: 4px 0; border-bottom: 1px solid var(--stone-2); margin: 0; }

/* questions */
.qa-wrap { max-width: 820px; }
.question-block { border-bottom: 1px solid var(--line); }
.question-block summary { cursor: pointer; font-family: var(--serif); font-size: 24px; font-weight: 600; color: var(--navy); padding: 18px 36px 18px 0; list-style: none; position: relative; }
.question-block summary::-webkit-details-marker { display: none; }
.question-block summary::after { content: "+"; position: absolute; right: 4px; top: 14px; font-size: 28px; color: var(--brass); font-weight: 400; }
.question-block[open] summary::after { content: "–"; }
.question-block div { padding: 0 0 18px; }
.question-block p { max-width: 68ch; }

/* form */
.form-wrap { display: grid; gap: 36px; grid-template-columns: 1fr; }
@media (min-width: 940px) { .form-wrap { grid-template-columns: minmax(0, 1fr) 300px; } }
form { background: var(--white); border: 1px solid var(--line); border-top: 2px solid var(--brass); padding: 28px 26px; }
fieldset { border: 0; padding: 0; margin: 0 0 22px; }
legend { font-family: var(--serif); font-size: 22px; font-weight: 600; color: var(--navy); margin-bottom: 10px; }
.option-row { display: flex; flex-wrap: wrap; gap: 8px; }
.option-row label { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 999px; padding: 8px 14px; font-size: 15px; background: var(--stone); cursor: pointer; }
.option-row label:has(:checked) { border-color: var(--brass); background: #fbf3dd; }
.option-row input { accent-color: var(--navy); }
.form-row { margin-bottom: 18px; }
.field-row { display: grid; gap: 0 18px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .field-row { grid-template-columns: 1fr 1fr; } }
label { display: block; font-weight: 500; font-size: 15.5px; margin-bottom: 6px; color: var(--navy); }
.aside-text { display: block; font-weight: 400; font-size: 14px; color: var(--mute); }
input[type="text"], input[type="email"], input[type="tel"], select, textarea { width: 100%; font: 400 16.5px var(--sans); color: var(--ink); background: var(--stone); border: 1px solid var(--line); border-radius: 4px; padding: 11px 12px; }
input:focus, select:focus, textarea:focus { border-color: var(--brass); outline: none; box-shadow: 0 0 0 3px rgba(201,162,74,.2); }
textarea { resize: vertical; }
.quiet-field { position: absolute; left: -9999px; }
.data-line { font-size: 14px; color: var(--mute); }
.form-side .aside-h { margin-top: 4px; }

/* footer */
.colophon { background: var(--navy); color: #c8c4ba; padding: 56px 0 28px; font-size: 14.5px; }
.colophon a { color: #e7e2d6; }
.colophon a:hover { color: var(--brass-l); }
.foot-grid { display: grid; gap: 30px; grid-template-columns: 1fr; }
@media (min-width: 760px) { .foot-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; } }
.colophon-keystone { font-family: var(--serif); font-size: 26px; color: #fff; margin-bottom: 8px; }
.foot-h { font-size: 12px; letter-spacing: .22em; text-transform: uppercase; color: var(--brass-l); margin-bottom: 10px; }
.colophon ul { list-style: none; padding: 0; margin: 0; }
.colophon li { margin: 0 0 8px; }
.foot-small { font-size: 13px; color: #9fa6b3; margin-top: 14px; }
.foot-line { margin-top: 30px; padding-top: 16px; border-top: 1px solid rgba(201,162,74,.35); font-size: 12.5px; color: #8e95a3; }
.float-go { display: none; }
@media (max-width: 1039px) { .float-go { display: block; position: fixed; left: 16px; right: 16px; bottom: 14px; z-index: 25; background: var(--brass); color: var(--navy); text-align: center; text-decoration: none; font-weight: 600; padding: 14px; border-radius: 999px; box-shadow: 0 8px 24px rgba(11,31,58,.3); } body { padding-bottom: 72px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .brass-button, .stone-panel { transition: none; } }