/* TopStockUS companion site. Layout: one 64rem column; header bar, content sections, footer. Same tokens as the methodology page. */
:root {
  --bg: #f7f8f9;
  --surface: #ffffff;
  --ink: #18202a;
  --muted: #5a6573;
  --rule: #dfe3e8;
  --accent: #0d6870;
  --accent-ink: #ffffff;
  --font-display: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-body: "IBM Plex Sans", -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-data: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #11161c; --surface: #18202a; --ink: #e6eaef; --muted: #9aa5b1; --rule: #2a3440;
    --accent: #4fc1c9; --accent-ink: #0b1418; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #11161c; --surface: #18202a; --ink: #e6eaef; --muted: #9aa5b1; --rule: #2a3440;
  --accent: #4fc1c9; --accent-ink: #0b1418; color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--ink); font-family: var(--font-body); font-size: 16px; line-height: 1.6; }
a { color: var(--accent); }
a:focus-visible, .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.wrap { max-width: 64rem; margin: 0 auto; padding-inline: 20px; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.2; text-wrap: balance; margin: 0; }
p { margin: 0; }

.site-header { border-bottom: 1px solid var(--rule); background: var(--surface); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 24px; padding-block: 14px; }
.brand { font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; color: var(--ink); text-decoration: none; letter-spacing: 0.01em; }
.brand span { color: var(--accent); }
.nav { display: flex; flex-wrap: wrap; gap: 4px 20px; font-size: 0.95rem; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }

main.site { display: grid; gap: 56px; padding-block: 48px 64px; }
.hero { display: grid; gap: 18px; max-width: 46rem; }
.eyebrow { font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.hero h1 { font-size: clamp(2.1rem, 5.5vw, 3rem); font-weight: 700; }
.lede { font-size: 1.15rem; color: var(--muted); }
.stores { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 11px 18px; border-radius: 8px; border: 1px solid var(--rule); background: var(--surface); color: var(--ink); text-decoration: none; font-weight: 500; }
.btn small { display: block; font-size: 0.72rem; color: var(--muted); font-weight: 400; line-height: 1.2; }
.btn[aria-disabled="true"] { cursor: default; }
.note { font-size: 0.9rem; color: var(--muted); }

section { display: grid; gap: 18px; }
section > h2 { font-size: 1.6rem; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); gap: 16px; }
.grid > * { min-width: 0; }
.card { background: var(--surface); border: 1px solid var(--rule); border-radius: 10px; padding: 18px 20px; display: grid; gap: 8px; align-content: start; }
.card h3 { font-size: 1.12rem; }
.card p { color: var(--muted); font-size: 0.95rem; }
.mono { font-family: var(--font-data); font-size: 0.85em; }
.prose { max-width: 44rem; display: grid; gap: 14px; }
.prose ul { margin: 0; padding-left: 1.2rem; display: grid; gap: 6px; }
.callout { border-left: 3px solid var(--accent); padding: 4px 0 4px 16px; }

.site-footer { border-top: 1px solid var(--rule); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; padding-block: 22px 32px; font-size: 0.88rem; color: var(--muted); }
.site-footer a { color: var(--muted); }

/* Placeholder wordmark (graphics/topstockus_logo.svg, rebuilt as text): Top light #00a1fe, $ bold + tock #0376bb, US italic superscript #ff9400 */
.brand.logo { font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; font-size: 1.55rem; letter-spacing: 0; line-height: 1; }
.brand.logo .l-top { font-weight: 300; color: #00a1fe; }
.brand.logo .l-dollar { font-weight: 700; color: #0376bb; }
.brand.logo .l-tock { font-weight: 500; color: #0376bb; }
.brand.logo .l-us { font-weight: 700; font-style: italic; color: #ff9400; font-size: 0.667em; vertical-align: 0.5em; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .brand.logo .l-dollar, :root:not([data-theme="light"]) .brand.logo .l-tock { color: #3ea6ec; } }
:root[data-theme="dark"] .brand.logo .l-dollar, :root[data-theme="dark"] .brand.logo .l-tock { color: #3ea6ec; }