@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Manrope:wght@600;700&display=swap');

:root {
  --charcoal: #202326;
  --copper: #AD765C;
  --ivory: #F5F3ED;
  --muted: #62686D;
  --line: #D9D5CD;
  --copper-text: #87553E;
  --heading: Manrope, Arial, sans-serif;
  --body: Inter, Arial, sans-serif;
  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --header-offset: 9rem;
  font-size: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-offset);
}

* { box-sizing: border-box; }
body { margin: 0; background: #E9E6DE; color: var(--charcoal); font: 1rem/1.65 var(--body); letter-spacing: 0; }
button, input, textarea, select { font: inherit; }
a, button, summary { touch-action: manipulation; -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-underline-offset: .25em; }
::selection { background: #AD765C44; }
:focus-visible { outline: 3px solid var(--copper-text); outline-offset: 5px; }
.skip-link { position: fixed; top: -8rem; left: 1rem; padding: .75rem 1.25rem; z-index: 100; background: var(--charcoal); color: var(--ivory); }
.skip-link:focus { top: .5rem; }
.page-frame { max-width: 108rem; margin: auto; background: var(--ivory); box-shadow: 0 0 0 1px #2023260D, 0 1.5rem 5rem #2023260A; }

/* A single translucent navigation layer keeps the page in view beneath it. */
.site-header { position: sticky; top: 0; z-index: 40; display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; min-height: 7rem; padding: .6rem 5.2%; background: rgba(245, 243, 237, .9); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px); box-shadow: inset 0 1px 0 #FFFFFFCC, 0 1px 0 #20232616, 0 10px 24px -22px #20232699; }
.brand { flex: 0 0 15.5rem; display: block; line-height: 0; }
.brand img { display: block; width: 100%; height: auto; }
nav { display: flex; align-items: center; gap: 2.25rem; }
nav a { display: flex; align-items: center; gap: 1.5rem; min-height: 2.75rem; position: relative; font-size: .8125rem; font-weight: 500; text-decoration: none; }
nav a::after { content: ''; position: absolute; bottom: .2rem; left: 0; right: 0; height: 1px; background: var(--copper-text); transform: scaleX(0); transform-origin: left; transition: transform 180ms var(--ease-out); }
nav a:hover::after, nav a:focus-visible::after { transform: scaleX(1); }
.nav-contact { margin-left: .5rem; }
.nav-contact span { font-size: 1.4rem; }

h1, h2, h3 { margin: 0; font-family: var(--heading); font-weight: 600; font-optical-sizing: auto; text-wrap: balance; }
h1, h2 { letter-spacing: -.02em; }
h3 { letter-spacing: -.01em; }
p { margin: 0; }
.eyebrow { display: flex; align-items: center; gap: 1rem; margin: 0; font-size: .6875rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; line-height: 1.5; }
.square { width: .4375rem; height: .4375rem; background: var(--copper); flex: 0 0 auto; }
.section-no { color: var(--copper-text); font-size: .625rem; letter-spacing: .02em; }

/* The mark and skyline occupy separate planes, leaving the city visible. */
.hero { display: grid; grid-template-columns: 56% 44%; min-height: 43.5rem; overflow: hidden; }
.hero-copy { position: relative; isolation: isolate; display: flex; flex-direction: column; align-items: flex-start; padding: 3.25rem 9.3% 0; overflow: hidden; }
.hero-copy::before { content: ""; position: absolute; z-index: -2; inset: 0; background: url('capital-network.svg') center / cover no-repeat; pointer-events: none; }
.hero-copy::after { content: ""; position: absolute; z-index: -1; inset: 0; background: radial-gradient(ellipse at 22% 26%, #F5F3EDFA 0%, #F5F3EDF0 28%, #F5F3ED80 58%, #F5F3ED00 90%); pointer-events: none; }
h1 { font-size: clamp(2.875rem, 4.25vw, 4.6rem); line-height: 1.06; font-weight: 700; margin: 2.2rem 0 1.75rem; max-width: 100%; }
h1 > span { display: block; }
.hero-highlight { color: var(--copper-text); max-width: 10.6ch; }
.hero-description { position: relative; max-width: 28rem; font-size: 1rem; line-height: 1.75; color: var(--charcoal); margin-bottom: 1.75rem; }
.button { position: relative; display: inline-flex; justify-content: space-between; align-items: center; gap: 2.25rem; width: fit-content; min-height: 3.25rem; padding: .9375rem 1.375rem; border: 1px solid var(--charcoal); border-radius: 4px; background: var(--charcoal); color: var(--ivory); box-shadow: 0 1px 1px #20232614, 0 5px 12px -8px #20232677; text-decoration: none; font-size: .8125rem; line-height: 1.4; font-weight: 600; transition: transform 180ms var(--ease-out), background-color 180ms ease, box-shadow 180ms ease; }
.button > span { font-size: 1.3rem; line-height: 1; transition: transform 180ms var(--ease-out); }
.button:active { transform: scale(.98); transition-duration: 80ms; background: #363B40; }
.hero-bottom { position: relative; display: flex; justify-content: space-between; align-items: center; align-self: stretch; gap: 1rem; min-height: 5.5rem; margin-top: auto; border-top: 1px solid #20232622; font-size: .6875rem; color: #454B50; }
.hero-bottom::before { content: ""; position: absolute; left: 0; top: -1px; width: 4rem; height: 2px; background: var(--copper); }
.hero-bottom > a { display: grid; place-items: center; min-width: 2.75rem; min-height: 2.75rem; font-size: 1.5rem; text-decoration: none; }
.hero-visual { position: relative; isolation: isolate; overflow: hidden; min-height: 43.5rem; background: var(--charcoal); color: var(--ivory); }
.hero-visual::before { display: none; }
.hero-visual::after { display: none; }
.visual-top { display: flex; justify-content: space-between; align-items: center; gap: 1rem; position: relative; z-index: 3; margin: 0 9%; padding: 1.75rem 0 1rem; border-bottom: 1px solid #F5F3ED29; font-size: .625rem; letter-spacing: .01em; }
.emblem-field { position: absolute; z-index: 2; display: grid; place-items: start center; top: 1.25rem; left: 0; right: 0; height: 23rem; pointer-events: none; }
.emblem-field img { display: block; width: min(76%, 25rem); height: auto; mix-blend-mode: lighten; }
.skyline-motif { position: absolute; z-index: 1; left: 0; right: 0; bottom: 6rem; height: 12rem; background: url('london-skyline.svg') center bottom / contain no-repeat; pointer-events: none; opacity: 1; }
.visual-bottom { position: absolute; z-index: 3; left: 9%; right: 9%; bottom: 1.25rem; display: flex; align-items: flex-end; justify-content: space-between; gap: 1rem; padding-top: 1.25rem; border-top: 1px solid #F5F3ED3D; font-family: var(--heading); font-size: .9375rem; line-height: 1.5; }
.visual-index { font-family: var(--body); color: #D7AC96; font-size: .5625rem; letter-spacing: .08em; padding-bottom: .125rem; }

.section-grid { display: grid; grid-template-columns: 32% 68%; gap: 0; padding: 5.25rem 5.2%; }
.section-label { align-self: start; padding-top: .4rem; }
.section-grid h2 { font-size: clamp(2rem, 2.8vw, 2.875rem); line-height: 1.17; }
.section-grid p:not(.eyebrow) { max-width: 42rem; margin-top: 1.5rem; color: var(--muted); font-size: 1rem; line-height: 1.85; }
.intro { position: relative; background: #FFFFFF; border-bottom: 1px solid #2023260D; box-shadow: inset 0 1px 0 #FFFFFF; }
.intro::before { content: ''; position: absolute; top: 0; left: 5.2%; width: 3rem; height: 3px; background: var(--copper); }
.intro h2 { font-size: clamp(1.9rem, 2.6vw, 2.625rem); font-weight: 600; }
.intro .section-label { gap: 1.25rem; }
.advisory { position: relative; isolation: isolate; background: var(--ivory); }
.advisory::before { content: ""; position: absolute; z-index: -1; inset: 0; background: url('capital-network.svg') left bottom / max(48%, 38rem) auto no-repeat; -webkit-mask-image: linear-gradient(155deg, transparent 8%, #000 60%, transparent 100%); mask-image: linear-gradient(155deg, transparent 8%, #000 60%, transparent 100%); opacity: .7; pointer-events: none; }
.advisory .section-label { position: sticky; top: var(--header-offset); padding-right: 2rem; }
.advisory .section-label h2 { margin-top: 1.75rem; font-size: 2.35rem; font-weight: 700; }
.advisory .section-aside { max-width: 15rem; margin-top: 1.5rem; font-size: .875rem; line-height: 1.75; }
.service-list { display: grid; gap: .875rem; align-content: start; }
details { position: relative; background: #FFFFFF; border-radius: 4px; box-shadow: 0 1px 2px #2023260B, 0 4px 20px -10px #20232612, inset 0 0 0 1px #2023260D; overflow: hidden; transition: background-color 180ms ease; }
details::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--copper); transform: scaleY(0); transform-origin: top; transition: transform 180ms var(--ease-out); }
details[open] { box-shadow: 0 1px 3px #2023260B, 0 10px 32px -18px #20232633, inset 0 0 0 1px #AD765C38; }
details[open]::before { transform: scaleY(1); }
summary { display: flex; align-items: center; gap: 1rem; min-height: 6rem; padding: 1.25rem 1.875rem; list-style: none; cursor: pointer; }
summary::-webkit-details-marker { display: none; }
summary:focus-visible { outline-offset: -6px; }
summary:active { background: #F5F3ED; }
.service-number { flex: 0 0 1.5rem; font-size: .6875rem; color: var(--copper-text); font-variant-numeric: tabular-nums; }
summary h3 { font-size: 1.4375rem; line-height: 1.3; }
.toggle { flex: 0 0 1.875rem; position: relative; height: 1.875rem; width: 1.875rem; margin-left: auto; background: #F5F3ED; border-radius: 4px; }
.toggle::before, .toggle::after { content: ''; position: absolute; top: calc(50% - .5px); left: calc(50% - 6px); width: 12px; height: 1px; background: var(--charcoal); }
.toggle::after { transform: rotate(90deg); transition: transform 160ms var(--ease-out); }
details[open] .toggle::after { transform: rotate(0); }
.service-body { padding: 0 3.125rem 1.875rem 4.375rem; }
.service-body p:not(.eyebrow) { font-size: .9375rem; margin-top: 0; line-height: 1.8; }
.service-body p.service-focus { margin-top: 1.125rem; font-size: .6875rem; color: var(--copper-text); line-height: 1.8; }
details[open] .service-body { animation: content-arrive 180ms var(--ease-out); }
@keyframes content-arrive { from { opacity: .5; transform: translateY(-3px); } to { opacity: 1; transform: translateY(0); } }

.approach { position: relative; isolation: isolate; overflow: hidden; background: var(--charcoal); color: var(--ivory); padding: 4.75rem 5.2% 5rem; }
.approach::before { content: ''; position: absolute; z-index: -1; top: -20%; right: 8%; width: 28%; height: 145%; border: 1px solid #F5F3ED0D; background: #FFFFFF03; transform: skewX(-21deg); pointer-events: none; }
.approach .section-no { color: #D7AC96; }
.approach-header { display: grid; grid-template-columns: 32% 68%; }
.approach h2 { max-width: 42rem; font-size: clamp(1.9rem, 2.8vw, 2.75rem); line-height: 1.2; }
.approach-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; margin-top: 3.5rem; }
.approach-steps > div { position: relative; padding: 1.75rem; border-radius: 4px; background: #FFFFFF05; box-shadow: inset 0 1px 0 #F5F3ED33, inset 1px 0 0 #F5F3ED0A, 0 12px 24px -22px #000000CC; }
.step-number { display: inline-block; color: #D7AC96; font-size: .6875rem; letter-spacing: .05em; }
.approach-steps h3 { margin-top: 1.375rem; font-size: 1.75rem; line-height: 1.2; }
.approach-steps p { max-width: 21rem; margin-top: 1.25rem; font-size: .875rem; color: #D9D5CD; line-height: 1.8; }
.approach :focus-visible { outline-color: var(--ivory); }

.contact { position: relative; isolation: isolate; background: #EEEAE2; padding-top: 5.25rem; padding-bottom: 5.25rem; }
.contact::before { content: ""; position: absolute; z-index: -1; inset: 0; background: url('capital-network-stone.svg') left bottom / max(60%, 42rem) auto no-repeat; -webkit-mask-image: linear-gradient(135deg, transparent 0%, #000 55%, transparent 100%); mask-image: linear-gradient(135deg, transparent 0%, #000 55%, transparent 100%); opacity: .8; pointer-events: none; }
.contact-body { position: relative; isolation: isolate; overflow: hidden; padding: 3rem; background: var(--ivory); border-radius: 4px; box-shadow: 0 1px 0 #FFFFFF, 0 1.25rem 3rem -2rem #20232655, inset 0 0 0 1px #FFFFFF99; }
.contact-body::before { content: ""; position: absolute; z-index: -1; inset: 0; background: linear-gradient(110deg, #F5F3EDFC 0%, #F5F3EDF0 35%, #F5F3ED33 100%), url('capital-network.svg') right center / cover no-repeat; pointer-events: none; }
.contact h2 { font-size: clamp(2.25rem, 3.3vw, 3.5rem); line-height: 1.08; font-weight: 700; }
.contact p:not(.eyebrow) { max-width: 36rem; font-size: .9375rem; }
.contact-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 1.5rem; margin-top: 2rem; }
.contact-email { display: inline-flex; align-items: center; min-height: 2.75rem; width: fit-content; color: var(--copper-text); font-size: .875rem; }
footer { padding: 2rem 5.2%; background: #FFFFFF; color: var(--muted); }
.footer-top { display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; font-size: .6875rem; }
.footer-top > a { display: inline-flex; align-items: center; min-height: 2.75rem; }
.company-disclosure { max-width: 72rem; margin-top: 1.125rem; padding-top: 1.25rem; border-top: 1px solid var(--line); font-size: .75rem; line-height: 1.8; }
.company-disclosure p { margin-bottom: .75rem; }
.company-disclosure p:last-child { margin-bottom: 0; }
.company-disclosure strong { color: var(--charcoal); font-weight: 600; }

@media (hover: hover) and (pointer: fine) {
  .button:hover { background: #32373C; box-shadow: 0 2px 3px #20232616, 0 8px 18px -10px #20232677; transform: translateY(-1px); }
  .button:hover > span { transform: translate(2px, -2px); }
  summary:hover { background: #FAF9F6; }
  summary:hover h3 { color: var(--copper-text); }
  .contact-email:hover { color: var(--charcoal); }
}

@media (min-width: 1600px) {
  .hero, .hero-visual { min-height: 47rem; }
  .hero-copy { padding-top: 4rem; }
  h1 { margin-top: 2.75rem; font-size: 4.8rem; }
  .hero-description { font-size: 1.125rem; }
  .emblem-field { top: 1.5rem; }
  .emblem-field img { width: 25.5rem; }
  .skyline-motif { left: 0; right: 0; bottom: 6rem; }
}

@media (max-width: 1100px) {
  .site-header { padding-inline: 4%; }
  nav { gap: 1.5rem; }
  .hero, .hero-visual { min-height: 42rem; }
  .hero-copy { padding: 2.75rem 7% 0; }
  h1 { font-size: clamp(2.5rem, 4.3vw, 3rem); margin-top: 2rem; }
  .hero-description { font-size: .9375rem; }
  .emblem-field { top: 1.5rem; }
  .emblem-field img { width: 82%; }
  .visual-top { font-size: .5625rem; gap: .5rem; }
  .visual-bottom { font-size: .875rem; }
  .skyline-motif { left: 0; right: 0; bottom: 6rem; }
  .section-grid { padding: 4rem 4%; grid-template-columns: 30% 70%; }
  .advisory .section-label h2 { font-size: 2rem; }
  .advisory .section-label { padding-right: 1.25rem; }
  summary { padding-inline: 1.5rem; gap: .75rem; }
  summary h3 { font-size: 1.3125rem; }
  .service-body { padding-left: 3.75rem; padding-right: 2rem; }
  .approach { padding: 4rem 4%; }
  .approach-header { grid-template-columns: 30% 70%; }
  .approach-steps { gap: .75rem; }
  .approach-steps > div { padding: 1.5rem; }
  .contact-body { padding: 2.25rem; }
  .contact h2 { font-size: 2.75rem; }
  footer { padding-inline: 4%; }
  .footer-tagline { display: none; }
}

@media (max-width: 760px) {
  :root { --header-offset: 10rem; }
  .page-frame { box-shadow: none; }
  .site-header { padding: .375rem 6% .25rem; flex-wrap: wrap; gap: 0; min-height: 0; }
  .brand { flex-basis: 15rem; max-width: 100%; }
  .site-header nav { width: 100%; justify-content: space-between; gap: .75rem; padding-top: .25rem; border-top: 1px solid #20232614; }
  nav a { min-height: 2.75rem; font-size: .6875rem; }
  .nav-contact { margin-left: 0; gap: .5rem; }
  .nav-contact span { font-size: 1.1875rem; }
  .hero { display: flex; flex-direction: column; min-height: 0; }
  .hero-copy { padding: 2.5rem 6% 0; }
  .eyebrow { font-size: .625rem; gap: .75rem; }
  h1 { font-size: clamp(2.45rem, 7.6vw, 3.5rem); margin: 1.75rem 0 1.5rem; line-height: 1.08; max-width: 100%; }
  .hero-highlight { max-width: 11ch; }
  .hero-description { font-size: .9375rem; }
  .hero-bottom { min-height: 4.75rem; margin-top: 3.5rem; font-size: .625rem; }
  .hero-visual { min-height: clamp(27rem, calc(22rem + 32vw), 38rem); }
  .visual-top { padding-top: 1.5rem; margin-inline: 6%; font-size: .625rem; }
  .emblem-field { top: 0; height: 17rem; }
  .emblem-field img { width: min(67%, 18rem); }
  .skyline-motif { left: 0; right: 0; bottom: 6rem; }
  .visual-bottom { margin: 0; left: 6%; right: 6%; bottom: 1.25rem; font-size: .8125rem; padding-top: 1rem; }
  .visual-index { font-size: .5625rem; }
  .section-grid { display: block; padding: 3.25rem 6%; }
  .section-label { padding: 0; margin-bottom: 1.75rem; }
  .section-grid h2, .intro h2 { font-size: clamp(1.8rem, 5.6vw, 2.25rem); }
  .section-grid p:not(.eyebrow) { font-size: .9375rem; margin-top: 1.25rem; line-height: 1.8; }
  .intro::before { left: 6%; }
  .advisory .section-label { position: static; padding: 0; }
  .advisory .section-label h2 { margin-top: 1.25rem; font-size: 2rem; }
  .advisory .section-label h2 br { display: none; }
  .advisory .section-aside { max-width: 100%; font-size: .875rem; }
  .service-list { gap: .75rem; }
  summary { min-height: 5.5rem; padding: 1.25rem; gap: .625rem; }
  .service-number { flex-basis: 1.25rem; }
  summary h3 { font-size: clamp(1.05rem, 4.2vw, 1.25rem); }
  .toggle { flex-basis: 1.5rem; width: 1.5rem; height: 1.5rem; }
  .service-body { padding: 0 1.25rem 1.5rem 3.125rem; }
  .service-body p:not(.eyebrow) { margin-top: 0; font-size: .875rem; }
  .service-body p.service-focus { margin-top: 1rem; font-size: .6875rem; }
  .approach { padding: 3.25rem 6%; }
  .approach-header { display: block; }
  .approach h2 { margin-top: 1.75rem; font-size: clamp(1.8rem, 5.6vw, 2.25rem); }
  .approach-steps { grid-template-columns: 1fr; gap: 1rem; margin-top: 2rem; }
  .approach-steps > div { padding: 1.5rem; }
  .approach-steps h3 { margin-top: .875rem; font-size: 1.625rem; }
  .approach-steps p { max-width: 100%; margin-top: 1rem; }
  .contact-body { padding: 2rem 1.5rem; }
  .contact h2 { font-size: clamp(2rem, 6.2vw, 2.75rem); }
  .contact-actions { align-items: flex-start; flex-direction: column; gap: .75rem; margin-top: 1.75rem; }
  .contact .button { max-width: 100%; gap: 1.25rem; font-size: .75rem; }
  .contact-email { font-size: .875rem; }
  footer { padding: 1.5rem 6%; }
  .footer-top { gap: .75rem; font-size: .625rem; }
  .company-disclosure { font-size: .75rem; }
}

@media (max-width: 360px) {
  .hero-copy { padding-inline: 5%; }
  h1 { font-size: 2.25rem; }
  .contact-body { padding-inline: 1.125rem; }
  summary { padding-inline: 1rem; }
  .service-number { flex-basis: 1rem; }
}

@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .button:active { transform: none; }
}
@media (prefers-reduced-transparency: reduce) {
  .site-header { background: var(--ivory); -webkit-backdrop-filter: none; backdrop-filter: none; }
}
@media (prefers-contrast: more) {
  .site-header { background: var(--ivory); -webkit-backdrop-filter: none; backdrop-filter: none; box-shadow: 0 1px 0 var(--charcoal); }
  details, .contact-body { outline: 1px solid var(--charcoal); }
  .hero-copy::before, .hero-copy::after, .advisory::before, .contact::before, .contact-body::before { display: none; }
  .service-body p, .section-grid p:not(.eyebrow), .hero-description { color: var(--charcoal); }
}