/* London Tax Bureau — shared styles */

/* Palettes. Default is bottle green; alternatives are chosen with
   <html data-palette="midnight"> or <html data-palette="claret">. */
:root {
  --dark: #13302a;          /* principal colour */
  --darker: #0c221d;        /* footer, deepest band */
  --dark-line: #2c4a42;     /* rules on dark */
  --on-dark: #f3f1ea;       /* text on dark */
  --on-dark-muted: #b9c4bd;
  --accent: #b8955a;        /* brass: rules, ornaments, text on dark */
  --accent-deep: #7d5f2e;   /* brass dark enough for text on light */

  --paper: #fcfcfa;
  --stone: #eceae3;
  --ink: #1b2420;
  --slate: #5a615d;
  --rule: #d9d7cf;
  --white: #ffffff;

  --display: "Libre Caslon Display", "Libre Caslon Text", Georgia, "Times New Roman", serif;
  --serif: "Libre Caslon Text", Georgia, "Times New Roman", serif;
  --sans: "Libre Franklin", "Helvetica Neue", Arial, sans-serif;

  --wrap: 1240px;
  --gutter: clamp(20px, 5vw, 64px);
  --space: clamp(80px, 11vw, 150px);
}

[data-palette="midnight"] {
  --dark: #111c33; --darker: #0a1224; --dark-line: #2a3754;
  --on-dark: #f2f1ec; --on-dark-muted: #b3bbcc;
  --accent: #c2a068; --accent-deep: #7a5d2c;
  --ink: #171c28; --slate: #5a6070;
}
[data-palette="claret"] {
  --dark: #4a1622; --darker: #340e17; --dark-line: #663040;
  --on-dark: #f6f1ea; --on-dark-muted: #d4bfc2;
  --accent: #c4a36a; --accent-deep: #7a5a2a;
  --ink: #241a1c; --slate: #645a5c;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-deep); text-underline-offset: 0.22em; text-decoration-thickness: 1px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.skip { position: absolute; left: -999px; top: 0; background: var(--dark); color: var(--on-dark); padding: 10px 16px; z-index: 20; }
.skip:focus { left: 12px; top: 12px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.narrow { max-width: 820px; margin: 0 auto; padding: 0 var(--gutter); }
.center { text-align: center; }
.center p { margin-left: auto; margin-right: auto; }

/* Type */
h1, h2 { font-family: var(--display); font-weight: 400; margin: 0; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.8rem, 6.4vw, 5.75rem); line-height: 1.04; }
h2 { font-size: clamp(2.1rem, 4vw, 3.4rem); line-height: 1.1; }
h3 { font-family: var(--serif); font-weight: 400; font-size: 1.4rem; line-height: 1.3; margin: 0 0 0.5em; }
p { margin: 0 0 1em; max-width: 64ch; }
.lede {
  font-family: var(--serif); font-style: italic;
  font-size: clamp(1.2rem, 1.9vw, 1.5rem); line-height: 1.55; max-width: 46ch;
}
.muted { color: var(--slate); }

/* Ornament: a brass rule with a centred lozenge */
.ornament {
  position: relative; width: 150px; height: 11px; margin: 0 auto 28px;
  background: linear-gradient(var(--accent), var(--accent)) left center / 60px 1px no-repeat,
              linear-gradient(var(--accent), var(--accent)) right center / 60px 1px no-repeat;
}
.ornament::after {
  content: ""; position: absolute; left: 50%; top: 50%; width: 8px; height: 8px;
  border: 1px solid var(--accent); transform: translate(-50%, -50%) rotate(45deg);
}
.ornament.left { margin-left: 0; }

/* Header */
.site-header { background: var(--dark); color: var(--on-dark); }
.site-header a { color: var(--on-dark); text-decoration: none; }

.topbar { border-bottom: 1px solid var(--dark-line); font-size: 0.85rem; color: var(--on-dark-muted); }
.topbar .wrap { display: flex; justify-content: space-between; gap: 16px; padding-top: 10px; padding-bottom: 10px; }
.topbar .contacts { display: flex; gap: 24px; }
.topbar a { color: var(--on-dark-muted); }
.topbar a:hover { color: var(--on-dark); }

.masthead { padding: 34px 0 22px; text-align: center; position: relative; }
.crest { display: inline-flex; flex-direction: column; align-items: center; gap: 14px; }
.crest-mark {
  width: 64px; height: 64px; border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--display); font-size: 1.05rem; letter-spacing: 0.08em; padding-left: 0.08em;
  color: var(--accent);
  border: 1px solid var(--accent);
  box-shadow: 0 0 0 4px var(--dark), 0 0 0 5px var(--accent);
}
.crest-name { font-family: var(--display); font-size: clamp(1.7rem, 3vw, 2.3rem); line-height: 1; letter-spacing: 0.02em; }
.crest-est { font-family: var(--serif); font-style: italic; font-size: 0.98rem; color: var(--on-dark-muted); }

.nav { border-top: 1px solid var(--dark-line); border-bottom: 1px solid var(--dark-line); }
.nav ul { list-style: none; margin: 0 auto; padding: 0; display: flex; justify-content: center; gap: clamp(24px, 4vw, 56px); }
.nav a { display: inline-block; padding: 16px 0 14px; font-size: 0.98rem; letter-spacing: 0.02em; border-bottom: 1px solid transparent; }
.nav a:hover { border-bottom-color: var(--on-dark-muted); }
.nav a[aria-current="page"] { color: var(--accent); border-bottom-color: var(--accent); }

.nav-toggle {
  display: none; position: absolute; right: var(--gutter); top: 24px;
  background: none; color: var(--on-dark); border: 1px solid var(--dark-line);
  font: inherit; font-size: 0.95rem; padding: 8px 14px; cursor: pointer;
}

@media (max-width: 760px) {
  .topbar .address { display: none; }
  .topbar .wrap { justify-content: center; }
  .masthead { padding: 22px var(--gutter) 20px; text-align: left; }
  .crest { flex-direction: row; gap: 14px; align-items: center; }
  .crest-mark { width: 46px; height: 46px; font-size: 0.8rem; box-shadow: 0 0 0 3px var(--dark), 0 0 0 4px var(--accent); }
  .crest-name { font-size: 1.35rem; }
  .crest-est { display: none; }
  .nav-toggle { display: block; top: 26px; }
  .nav { display: none; border-bottom: 0; }
  .nav.is-open { display: block; }
  .nav ul { flex-direction: column; gap: 0; padding: 0 var(--gutter) 12px; }
  .nav li a { display: block; padding: 14px 0; border-bottom: 1px solid var(--dark-line); }
}

/* Dark bands */
.band-dark { background: var(--dark); color: var(--on-dark); }
.band-dark a { color: var(--on-dark); }
.band-dark .muted { color: var(--on-dark-muted); }
.band-stone { background: var(--stone); }

.section { padding: var(--space) 0; }
.section-head { margin-bottom: clamp(44px, 6vw, 72px); }
.section-head h2 { margin-bottom: 18px; }
.section-head p { margin-bottom: 0; }

/* Home hero */
.hero { padding: clamp(56px, 7vw, 96px) 0 clamp(200px, 22vw, 300px); text-align: center; }
.hero h1 { max-width: 19ch; margin: 0 auto 30px; }
.hero .lede { margin: 0 auto 40px; color: var(--on-dark-muted); }
.hero .actions { justify-content: center; }

.framed { margin: calc(clamp(160px, 18vw, 250px) * -1) auto 0; }
.framed .frame { padding: 10px; border: 1px solid var(--accent); background: var(--paper); }
.framed img { width: 100%; aspect-ratio: 1796 / 492; object-fit: cover; }
.framed figcaption { font-family: var(--serif); font-style: italic; font-size: 0.95rem; color: var(--slate); text-align: center; padding-top: 14px; }
@media (max-width: 760px) {
  .framed .frame { padding: 6px; }
}

/* Page banner (inner pages) */
.banner { padding: clamp(72px, 9vw, 120px) 0 clamp(72px, 9vw, 110px); text-align: center; }
.banner h1 { max-width: 16ch; margin: 0 auto 26px; }
.banner .lede { margin: 0 auto; color: var(--on-dark-muted); }
.banner.with-photo { padding-bottom: clamp(200px, 22vw, 300px); }

/* Buttons */
.actions { display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: center; }
.button {
  display: inline-block; font: inherit; font-size: 1rem; font-weight: 500; letter-spacing: 0.02em;
  text-decoration: none; padding: 16px 30px; cursor: pointer;
  background: var(--dark); color: var(--on-dark); border: 1px solid var(--dark);
}
.button:hover { background: var(--darker); color: var(--on-dark); }
.band-dark .button { background: var(--accent); border-color: var(--accent); color: var(--darker); }
.band-dark .button:hover { background: var(--on-dark); border-color: var(--on-dark); color: var(--darker); }
.button.ghost { background: transparent; color: var(--on-dark); border-color: var(--accent); }
.button.ghost:hover { background: var(--accent); color: var(--darker); }
.text-link { color: var(--ink); font-weight: 500; }

/* Statement */
.statement { font-family: var(--display); font-style: italic; font-size: clamp(2.2rem, 5vw, 4.4rem); line-height: 1.12; max-width: 20ch; margin: 0 auto; }

/* Split */
.split { display: grid; grid-template-columns: 1fr 1.35fr; gap: clamp(36px, 7vw, 110px); align-items: start; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

/* Services index */
.ledger { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px clamp(28px, 4vw, 64px); }
.ledger h3 { font-size: 1.6rem; padding-bottom: 16px; border-bottom: 1px solid var(--accent); margin: 0; }
.ledger ul { list-style: none; margin: 0; padding: 0; }
.ledger li { border-bottom: 1px solid var(--dark-line); }
.ledger li a { display: block; padding: 14px 0; text-decoration: none; }
.ledger li a:hover { color: var(--accent); }
@media (max-width: 960px) { .ledger { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .ledger { grid-template-columns: 1fr; } }

/* Principles */
.principles { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(36px, 5vw, 72px); text-align: center; }
.principles h3 { font-size: 1.55rem; margin-bottom: 14px; }
.principles p { margin: 0 auto; max-width: 34ch; }
@media (max-width: 860px) { .principles { grid-template-columns: 1fr; } }

/* Services page */
.service-nav { background: var(--stone); border-bottom: 1px solid var(--rule); }
.service-nav ul { list-style: none; margin: 0; padding: 20px 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 32px; }
.service-nav a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--rule); font-size: 0.95rem; }
.service-nav a:hover { border-bottom-color: var(--accent-deep); }

.service {
  display: grid; grid-template-columns: 1fr 1.5fr; gap: 20px clamp(36px, 7vw, 110px);
  padding: clamp(56px, 7vw, 96px) 0; border-bottom: 1px solid var(--rule); scroll-margin-top: 24px;
}
.service:last-child { border-bottom: 0; }
.service h2 { font-size: clamp(1.9rem, 3.2vw, 2.7rem); }
.service h2::after { content: ""; display: block; width: 48px; height: 1px; background: var(--accent); margin-top: 22px; }
.service ul { margin: 0 0 1em; padding-left: 1.1em; max-width: 60ch; }
.service li { margin-bottom: 0.4em; }
.service li::marker { color: var(--accent-deep); }
@media (max-width: 860px) { .service { grid-template-columns: 1fr; } }

/* About */
.profile { display: grid; grid-template-columns: 300px 1fr; gap: clamp(36px, 6vw, 96px); align-items: center; }
.profile figure { margin: 0; }
.profile .frame { padding: 8px; border: 1px solid var(--accent); }
.profile img { width: 100%; aspect-ratio: 271 / 398; object-fit: cover; }
.profile figcaption { font-family: var(--serif); font-style: italic; color: var(--slate); padding-top: 12px; text-align: center; }
@media (max-width: 700px) { .profile { grid-template-columns: 1fr; } .profile figure { max-width: 240px; } }

/* Contact details */
.details { list-style: none; margin: 0; padding: 0; }
.details li { padding: 20px 0; border-bottom: 1px solid var(--rule); }
.details li:first-child { border-top: 1px solid var(--accent); }
.details .label { display: block; font-family: var(--serif); font-style: italic; color: var(--slate); margin-bottom: 4px; }
.details a { color: var(--ink); }
.details .big { font-family: var(--display); font-size: 1.7rem; line-height: 1.2; text-decoration: none; }
address { font-style: normal; }

/* Form, set in a framed panel */
.panel {
  background: var(--white); border: 1px solid var(--rule);
  outline: 1px solid var(--accent); outline-offset: -10px;
  padding: clamp(32px, 5vw, 60px);
}
.panel h2 { font-size: clamp(1.9rem, 3vw, 2.5rem); margin-bottom: 8px; }
.form { display: grid; gap: 22px; margin-top: 28px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
@media (max-width: 620px) { .form-row { grid-template-columns: 1fr; } }
.field label { display: block; font-size: 0.92rem; font-weight: 500; margin-bottom: 6px; }
.field .optional { font-weight: 400; color: var(--slate); }
.field input, .field select, .field textarea {
  width: 100%; font: inherit; font-size: 1rem; color: var(--ink);
  background: var(--paper); border: 1px solid #c2c0b8; border-radius: 0; padding: 13px 14px;
}
.field textarea { min-height: 140px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent-deep); }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 0.95rem; }
.check input { margin-top: 5px; width: 18px; height: 18px; accent-color: var(--dark); }
.hidden { position: absolute; left: -9999px; }

.enquiry { display: grid; grid-template-columns: 1fr 1.5fr; gap: clamp(36px, 7vw, 110px); align-items: start; }
@media (max-width: 900px) { .enquiry { grid-template-columns: 1fr; } }

/* Footer */
.site-footer { background: var(--darker); color: var(--on-dark-muted); padding: 80px 0 36px; font-size: 0.95rem; }
.site-footer a { color: var(--on-dark); }
.footer-crest { text-align: center; padding-bottom: 48px; }
.footer-crest .crest-name { color: var(--on-dark); display: block; margin-bottom: 8px; }
.footer-crest .crest-est { display: block; }
.footer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 36px; padding: 40px 0; border-top: 1px solid var(--dark-line); border-bottom: 1px solid var(--dark-line); text-align: center; }
.footer-grid h2 { font-family: var(--serif); font-style: italic; font-size: 1.05rem; color: var(--accent); margin-bottom: 10px; }
.footer-grid p, .footer-grid address { margin: 0 auto; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 6px; }
.footer-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-top: 24px; font-size: 0.85rem; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr; } }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
