/* Marketing site styles — a static subset of design/system/tokens.css.
   Brand switches on <html data-brand>, set before first paint by the inline
   head script on every page (design/system/branding.md). */
:root {
  --bg: #ffffff; --surface: #f6f7f9; --border: #e3e4e8;
  --text: #1e1f24; --text-2: #4b4d56; --muted: #646673;
  --brand: #1c6397; --brand-hover: #1d547c; --brand-contrast: #ffffff;
  --link: #1c6397; --focus: #3896da;
  --accent: #ffad5b; --accent-on: #1e1f24;
  --band: #1c6397; --band-text: #ffffff; --band-stripe: #ffad5b;
  --radius: 10px; --radius-sm: 6px;
  --font: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: Montserrat, Inter, system-ui, sans-serif;
}
[data-brand="prem"] {
  --brand: #465b1a; --brand-hover: #394b16; --link: #465b1a; --focus: #6e9325;
  --accent: #c1d72e; --accent-on: #1e1f24;
  --band: #383945; --band-stripe: #c1d72e;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #16171b; --surface: #1c1d21; --border: #2c3038;
    --text: #eef0f3; --text-2: #c8c9d0; --muted: #a9adb8;
    --link: #7fbbe8; --band: #1d547c; }
  [data-brand="prem"] { --link: #c1d72e; --band: #383945; }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--font); }
body { font-size: 17px; line-height: 1.6; }
a { color: var(--link); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }
h1, h2 { font-family: var(--font-display); font-weight: 700; letter-spacing: 0.01em; line-height: 1.2; }
h1 { font-size: 36px; margin: 0 0 12px; }
h2 { font-size: 24px; margin: 0 0 16px; }
h3 { font-size: 17px; margin: 0 0 6px; }
p { margin: 0 0 12px; }
.sub { color: var(--muted); }
/* Brand-conditional content: the ARKE variant renders by default. !important so the
   nav/footer/button display rules can never resurface the other brand's links. */
.brand-prem, [data-brand="prem"] .brand-arke { display: none !important; }
[data-brand="prem"] .brand-prem { display: inline !important; }
[data-brand="prem"] img.brand-prem { display: inline-block !important; }
[data-brand="prem"] .btn.brand-prem { display: inline-flex !important; }
/* Header */
header.site { border-bottom: 1px solid var(--border); }
header.site .wrap { display: flex; align-items: center; flex-wrap: wrap; gap: 4px 8px; padding-top: 14px; padding-bottom: 12px; }
.logo { margin-right: auto; display: flex; align-items: center; min-height: 44px; }
.logo img { height: 30px; width: auto; display: block; }
nav.primary { display: flex; flex-wrap: wrap; align-items: center; gap: 2px; }
nav.primary a { text-decoration: none; font-size: 15px; color: var(--text-2); padding: 10px 10px; border-radius: var(--radius-sm); min-height: 44px; display: inline-flex; align-items: center; }
nav.primary a:hover { color: var(--text); }
nav.primary a[aria-current="page"] { color: var(--text); font-weight: 600; box-shadow: inset 0 -3px 0 var(--accent); }
/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 20px;
  border-radius: var(--radius-sm); border: 1px solid transparent; font: 600 16px var(--font);
  text-decoration: none; cursor: pointer; }
.btn-primary { background: var(--brand); color: var(--brand-contrast); }
.btn-primary:hover { background: var(--brand-hover); }
.btn-accent { background: var(--accent); color: var(--accent-on); }
.btn-onband { background: transparent; color: var(--band-text); border-color: var(--band-text); }
nav.primary a.btn-primary { color: var(--brand-contrast); }
/* Hero band */
.hero { background: var(--band); color: var(--band-text); border-top: 6px solid var(--band-stripe); }
.hero .wrap { padding-top: 56px; padding-bottom: 56px; }
.hero .over { display: block; font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; opacity: 0.85; margin-bottom: 12px; }
.hero p { max-width: 62ch; font-size: 18px; margin-bottom: 24px; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 12px; }
/* Sections and cards */
section.sec { padding: 40px 0; }
section.sec + section.sec { padding-top: 0; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; }
.card p { margin: 0; font-size: 15px; color: var(--text-2); }
.types { display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 0; list-style: none; }
.types li { background: var(--surface); border: 1px solid var(--border); border-radius: 9999px; padding: 6px 16px; font-size: 15px; }
.prose { max-width: 68ch; }
/* Forms */
form.lead { max-width: 640px; display: grid; gap: 16px; }
form.lead[hidden] { display: none; } /* the grid rule must not override [hidden] */
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 639px) { .field-row { grid-template-columns: 1fr; } }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--bg);
  color: var(--text); font: 400 16px var(--font); }
.field textarea { min-height: 96px; resize: vertical; }
.field .help { font-size: 13px; color: var(--muted); margin-top: 4px; }
.form-note { font-size: 15px; margin: 0; }
.form-note.err { color: #a4262c; }
@media (prefers-color-scheme: dark) { .form-note.err { color: #f1707b; } }
.form-success { background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0; padding: 14px 18px; max-width: 640px; }
/* Footer */
footer.site { border-top: 1px solid var(--border); margin-top: 40px; padding: 24px 0 40px; color: var(--muted); font-size: 15px; }
footer.site nav { display: flex; flex-wrap: wrap; gap: 2px 4px; margin-bottom: 8px; }
footer.site nav a { padding: 8px 10px 8px 0; margin-right: 8px; min-height: 40px; display: inline-flex; align-items: center; }
footer.site p { font-size: 15px; margin: 8px 0; }
@media (max-width: 519px) { h1 { font-size: 29px; } .hero .wrap { padding-top: 40px; padding-bottom: 40px; } }