/* ============================================================
   Cultural Treasures — Numismatic Appraisals
   Modern static-site stylesheet (no external fonts, no CDN)
   ============================================================ */

:root {
  --navy-950: #081b2d;
  --navy-900: #0d2c44;
  --navy-800: #123a5c;
  --navy-700: #1a4a73;
  --gold-500: #c9a24b;
  --gold-600: #b98a2f;
  --gold-100: #f3ead2;
  --paper: #faf8f3;
  --white: #ffffff;
  --ink: #16283c;
  --ink-soft: #3d4f63;
  --line: #e4ddd0;
  --radius: 14px;
  --shadow-sm: 0 1px 3px rgba(13, 44, 68, .10);
  --shadow-md: 0 10px 30px -12px rgba(13, 44, 68, .28);
  --font-sans: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-serif: Georgia, "Times New Roman", Times, serif;
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy-700); }
a:hover { color: var(--gold-600); }
:focus-visible { outline: 3px solid var(--gold-500); outline-offset: 2px; border-radius: 4px; }

.container { max-width: 1080px; margin-inline: auto; padding-inline: 24px; }

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--gold-500); color: var(--navy-950);
  padding: 10px 18px; border-radius: 0 0 8px 0; z-index: 100; font-weight: 600;
}
.skip-link:focus { left: 0; color: var(--navy-950); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--navy-900);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 72px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: #fff; padding-block: 8px; }
.brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, var(--gold-100), var(--gold-500) 58%, var(--gold-600));
  color: var(--navy-950); font: 700 1.05rem/1 var(--font-serif);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, .55), var(--shadow-sm);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font: 700 1.22rem/1.15 var(--font-serif); letter-spacing: .3px; color: #fff; }
.brand-sub { font-size: .74rem; letter-spacing: .06em; text-transform: uppercase; color: #c9d7e4; }

.site-nav ul {
  list-style: none; display: flex; flex-wrap: wrap; gap: 2px;
  margin: 0; padding: 0;
}
.site-nav a {
  display: block; padding: 9px 11px; border-radius: 8px;
  color: #e8eef4; text-decoration: none; font-size: .92rem; font-weight: 600;
}
.site-nav a:hover { background: var(--navy-800); color: #fff; }
.site-nav a[aria-current="page"] { background: var(--navy-800); color: var(--gold-100); }
.nav-cta { background: var(--gold-500); color: var(--navy-950) !important; margin-left: 6px; }
.nav-cta:hover { background: var(--gold-600) !important; }
.nav-toggle {
  display: none;
  background: transparent; color: #fff; border: 1px solid rgba(255, 255, 255, .4);
  padding: 8px 14px; border-radius: 8px; font: 600 .92rem var(--font-sans); cursor: pointer;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb { background: var(--white); border-bottom: 1px solid var(--line); }
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: 0; padding: 10px 0; font-size: .84rem; }
.breadcrumb li + li::before { content: "›"; margin-right: 6px; color: var(--ink-soft); }
.breadcrumb a { text-decoration: none; color: var(--navy-700); }
.breadcrumb [aria-current="page"] { color: var(--ink-soft); }

/* ---------- Hero (home) ---------- */
.hero {
  background:
    radial-gradient(900px 340px at 85% -10%, rgba(201, 162, 75, .22), transparent 60%),
    linear-gradient(160deg, var(--navy-900) 0%, var(--navy-950) 100%);
  color: #fff;
}
.hero-inner { display: grid; grid-template-columns: 1.25fr .85fr; gap: 48px; align-items: center; padding-block: clamp(48px, 7vw, 88px); }
.kicker {
  margin: 0 0 14px;
  font-size: .8rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
  color: var(--gold-100);
}
.hero h1 {
  margin: 0 0 18px;
  font: 700 clamp(1.9rem, 4.4vw, 2.9rem)/1.18 var(--font-serif);
  letter-spacing: .2px; color: #fff;
}
.hero .lede { margin: 0 0 26px; font-size: 1.08rem; color: #dce6ef; max-width: 56ch; }
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-figure { margin: 0; }
.hero-figure .frame {
  background: var(--white); border-radius: var(--radius); padding: 14px;
  box-shadow: var(--shadow-md);
}
.hero-figure figcaption { margin-top: 10px; font-size: .85rem; color: #b9c9d8; text-align: center; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 10px;
  font-weight: 700; font-size: .95rem; text-decoration: none; line-height: 1.2;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--gold-500); color: var(--navy-950); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--gold-100); color: var(--navy-950); }
.btn-ghost { border: 1.5px solid rgba(255, 255, 255, .55); color: #fff; }
.btn-ghost:hover { border-color: var(--gold-500); color: var(--gold-100); }
.btn-outline { border: 1.5px solid var(--navy-700); color: var(--navy-700); }
.btn-outline:hover { background: var(--navy-900); border-color: var(--navy-900); color: #fff; }

/* ---------- Sections ---------- */
.section { padding-block: clamp(44px, 7vw, 80px); }
.section-alt { background: var(--white); border-block: 1px solid var(--line); }
.section-head { max-width: 720px; margin-bottom: 34px; }
.section-head h2, .section h2 { font: 700 clamp(1.5rem, 3vw, 2.05rem)/1.25 var(--font-serif); color: var(--navy-900); margin: 0 0 12px; }
.section-head p { margin: 0; color: var(--ink-soft); }
.kicker-gold {
  display: inline-block; margin: 0 0 10px;
  font-size: .74rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--gold-600);
}

/* Trust strip */
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.trust-item {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 18px 14px; box-shadow: var(--shadow-sm);
}
.trust-item h3 { margin: 0 0 4px; font-size: .98rem; color: var(--navy-900); }
.trust-item p { margin: 0; font-size: .86rem; color: var(--ink-soft); }

/* Cards / grids */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column; gap: 10px;
}
.card:hover { box-shadow: var(--shadow-md); }
.card h3 { margin: 0; font: 700 1.12rem/1.3 var(--font-serif); color: var(--navy-900); }
.card p { margin: 0; font-size: .93rem; color: var(--ink-soft); flex-grow: 1; }
.card .more { font-weight: 700; font-size: .9rem; text-decoration: none; color: var(--gold-600); }
.card .more::after { content: " →"; }
.card .more:hover { color: var(--navy-700); }

/* Split feature */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
.check-list { list-style: none; margin: 0; padding: 0; }
.check-list li { padding: 9px 0 9px 30px; position: relative; border-bottom: 1px dashed var(--line); }
.check-list li:last-child { border-bottom: 0; }
.check-list li::before {
  content: "✔"; position: absolute; left: 0; top: 8px;
  color: var(--gold-600); font-weight: 700;
}

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
.step {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; position: relative; box-shadow: var(--shadow-sm);
}
.step::before {
  counter-increment: step; content: counter(step);
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--navy-900); color: var(--gold-100); font-weight: 700;
  margin-bottom: 12px;
}
.step h3 { margin: 0 0 6px; font-size: 1.02rem; color: var(--navy-900); }
.step p { margin: 0; font-size: .88rem; color: var(--ink-soft); }

/* FAQ details */
.faq-list details {
  background: var(--white); border: 1px solid var(--line); border-radius: 10px;
  padding: 4px 18px; margin-bottom: 12px;
}
.faq-list summary {
  cursor: pointer; padding: 13px 26px 13px 0; position: relative;
  font-weight: 700; color: var(--navy-900); list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+"; position: absolute; right: 2px; top: 10px;
  font-size: 1.25rem; font-weight: 400; color: var(--gold-600);
  transition: transform .2s ease;
}
.faq-list details[open] summary::after { transform: rotate(45deg); }
.faq-list .answer { padding: 2px 0 14px; color: var(--ink-soft); }

/* Quote / callout */
.callout {
  background: linear-gradient(135deg, var(--navy-900), var(--navy-950));
  color: #fff; border-radius: var(--radius); padding: clamp(26px, 4vw, 40px);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 20px;
}
.callout h2 { margin: 0 0 6px; font: 700 1.5rem/1.25 var(--font-serif); color: #fff; }
.callout p { margin: 0; color: #cfdce7; }
.callout .contact-line { font-size: 1.05rem; font-weight: 700; color: var(--gold-100); }
.callout a { color: var(--gold-100); }

/* Clients */
.badge-row { display: flex; flex-wrap: wrap; gap: 10px; }
.badge {
  background: var(--white); border: 1px solid var(--line); border-radius: 999px;
  padding: 8px 16px; font-size: .88rem; font-weight: 600; color: var(--ink-soft);
}

/* ---------- Generic page article ---------- */
.page-hero {
  background: linear-gradient(160deg, var(--navy-900), var(--navy-950));
  color: #fff; padding-block: clamp(34px, 5vw, 58px);
}
.page-hero h1 { margin: 0 0 10px; font: 700 clamp(1.7rem, 3.6vw, 2.4rem)/1.2 var(--font-serif); color: #fff; }
.page-hero .lede { margin: 0; max-width: 68ch; color: #d5e0ea; }
.article { padding-block: clamp(36px, 5vw, 64px); }
.article .wrap { max-width: 800px; }
.article h2 { font: 700 1.55rem/1.3 var(--font-serif); color: var(--navy-900); margin: 38px 0 12px; }
.article h3 { font: 700 1.15rem/1.3 var(--font-serif); color: var(--navy-900); margin: 26px 0 8px; }
.article p { margin: 0 0 14px; color: var(--ink-soft); }
.article ul, .article ol { margin: 0 0 16px; padding-left: 22px; color: var(--ink-soft); }
.article li { margin-bottom: 6px; }
.article .note {
  background: var(--gold-100); border-left: 4px solid var(--gold-500);
  border-radius: 8px; padding: 14px 18px; margin: 18px 0; color: var(--ink);
}
.article table { width: 100%; border-collapse: collapse; margin: 16px 0; background: var(--white); }
.article th, .article td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; font-size: .92rem; }
.article th { background: var(--paper); color: var(--navy-900); }

/* Contact cards */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 26px 0; }
.contact-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; text-align: center; box-shadow: var(--shadow-sm);
}
.contact-card .label { font-size: .78rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--gold-600); margin-bottom: 8px; }
.contact-card .value { font-size: 1.12rem; font-weight: 700; color: var(--navy-900); }
.contact-card .value a { text-decoration: none; color: inherit; }
.contact-card .hint { font-size: .84rem; color: var(--ink-soft); margin-top: 4px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--navy-950); color: #b9c7d4; margin-top: 0; }
.footer-grid {
  display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 36px;
  padding-block: 44px 30px;
}
.site-footer h2 { font: 700 1.02rem/1.3 var(--font-serif); color: #fff; margin: 0 0 12px; }
.site-footer p { font-size: .9rem; margin: 0 0 10px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 7px; }
.site-footer a { color: #cdd9e4; text-decoration: none; font-size: .9rem; }
.site-footer a:hover { color: var(--gold-100); }
.footer-contact a { color: var(--gold-100); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .12); padding-block: 18px; }
.footer-bottom p { margin: 0; font-size: .82rem; }

/* ---------- 404 ---------- */
.notfound { text-align: center; padding-block: 80px; }
.notfound h1 { font: 700 2.6rem/1.2 var(--font-serif); color: var(--navy-900); }
.notfound .code { font-size: 5rem; font-weight: 800; color: var(--gold-500); line-height: 1; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 30px; }
  .hero-figure .frame { max-width: 460px; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; }
}
@media (max-width: 920px) {
  .nav-toggle { display: inline-block; }
  .site-nav ul {
    display: none; flex-direction: column; width: 100%;
    padding-bottom: 12px;
  }
  .site-nav.open ul { display: flex; }
  .nav-cta { margin-left: 0; display: inline-block; margin-top: 6px; text-align: center; }
  .header-inner { padding-block: 10px; }
}
@media (max-width: 620px) {
  .grid-3, .grid-2, .trust-grid, .steps, .footer-grid { grid-template-columns: 1fr; }
  .cta-row .btn { width: 100%; text-align: center; }
  .container { padding-inline: 18px; }
}