/* BA Circle: one-page static site. System fonts only (no webfont requests). */
:root {
  --blue: #1565c0;
  --blue-dark: #0d47a1;
  --ink: #0f1b33;
  --muted: #4a5873;
  --tint: #eef4fc;
  --line: #d9e2f0;
  --white: #fff;
  --radius: 14px;
  --max: 1120px;
  --font: "Avenir Next", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--white); line-height: 1.6; font-size: 1.0625rem; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; }
a { color: var(--blue); }
.container { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; }
.narrow { width: min(100% - 2.5rem, 760px); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 0; background: var(--ink); color: #fff; padding: .6rem 1rem; z-index: 100; }
.skip:focus { left: 0; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; border-radius: 4px; }

h1, h2, h3 { line-height: 1.15; letter-spacing: -.02em; margin: 0 0 .6em; }
h1 { font-size: clamp(2.3rem, 5.4vw, 4rem); font-weight: 800; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); font-weight: 800; }
h3 { font-size: 1.3rem; font-weight: 700; }
p { margin: 0 0 1em; }
.center { text-align: center; }
.sub { color: var(--muted); font-size: 1.15rem; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .8rem; font-weight: 700; color: var(--blue); margin-bottom: 1rem; }
.accent { color: var(--blue); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .5rem; background: var(--blue); color: #fff; border: 2px solid var(--blue); border-radius: 999px; padding: .85rem 1.7rem; font: inherit; font-weight: 700; text-decoration: none; cursor: pointer; transition: background .15s, transform .15s; }
.btn:hover { background: var(--blue-dark); border-color: var(--blue-dark); }
.btn:active { transform: translateY(1px); }
.btn--sm { padding: .5rem 1.15rem; font-size: .95rem; }
.btn--ghost { background: transparent; color: var(--blue); }
.btn--ghost:hover { background: var(--tint); color: var(--blue-dark); }
.btn--light { background: #fff; color: var(--blue-dark); border-color: #fff; white-space: nowrap; }
.btn--light:hover { background: var(--tint); border-color: var(--tint); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.bar { display: flex; align-items: center; gap: 1.5rem; min-height: 68px; }
.brand { display: inline-flex; align-items: center; gap: .6rem; font-weight: 800; font-size: 1.2rem; color: var(--ink); text-decoration: none; letter-spacing: -.01em; }
.nav { margin-left: auto; display: flex; gap: 1.6rem; }
.nav a { color: var(--ink); text-decoration: none; font-weight: 600; font-size: .98rem; }
.nav a:hover { color: var(--blue); }

/* Hero */
.hero { position: relative; overflow: hidden; background: linear-gradient(180deg, var(--tint), #fff 85%); padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(3rem, 7vw, 5.5rem); }
.hero-mark { position: absolute; right: -90px; top: 50%; translate: 0 -50%; width: min(52vw, 520px); height: auto; opacity: .09; pointer-events: none; }
.hero-inner { position: relative; }
.hero-inner > * { max-width: 800px; }
.lead { font-size: 1.25rem; color: var(--muted); max-width: 60ch; }
.chips { display: flex; flex-wrap: wrap; gap: .6rem; list-style: none; padding: 0; margin: 1.6rem 0 2rem; }
.chips li { background: #fff; border: 1px solid var(--line); color: var(--blue-dark); font-weight: 600; font-size: .92rem; padding: .35rem .9rem; border-radius: 999px; }
.actions { display: flex; flex-wrap: wrap; gap: .9rem; }

/* Sections */
.section { padding: clamp(3rem, 7vw, 5.5rem) 0; }
.section--tint { background: var(--tint); }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; margin-top: 2.2rem; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 1.8rem; box-shadow: 0 1px 2px rgba(15,27,51,.04); }
.card p { color: var(--muted); margin: 0; }
.num { display: block; font-weight: 800; color: var(--blue); font-size: .95rem; letter-spacing: .1em; margin-bottom: .8rem; }

/* Join band */
.join { background: var(--blue); color: #fff; padding: clamp(2.5rem, 6vw, 4rem) 0; }
.join-inner { display: flex; align-items: center; justify-content: space-between; gap: 2rem; flex-wrap: wrap; }
.join h2 { color: #fff; margin-bottom: .4em; }
.join p { margin: 0; max-width: 52ch; color: #e3eefc; font-size: 1.15rem; }

/* Testimonial */
.quote { margin: 0; }
.quote blockquote { margin: 0; font-size: 1.2rem; line-height: 1.65; }
.quote blockquote p:first-child::before { content: "\201C"; display: block; font-size: 4rem; line-height: .6; color: var(--blue); font-weight: 800; margin-bottom: .6rem; }
.quote figcaption { display: flex; align-items: center; gap: 1rem; margin-top: 1.5rem; color: var(--muted); font-size: .98rem; line-height: 1.4; }
.quote figcaption strong { color: var(--ink); }
.quote img { border-radius: 50%; object-fit: cover; width: 64px; height: 64px; }

/* Founder */
.founder { display: grid; grid-template-columns: minmax(240px, 380px) 1fr; gap: clamp(2rem, 6vw, 4.5rem); align-items: center; }
.founder-photo { background: var(--tint); border-radius: var(--radius); overflow: hidden; padding-top: 1.5rem; display: flex; align-items: flex-end; }
.founder-photo img { display: block; width: 100%; }
.founder p { color: var(--muted); }
.founder strong { color: var(--ink); }

/* Logos */
.logos { list-style: none; padding: 0; margin: 2.2rem 0 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 1rem 1.5rem; align-items: center; }
.logos li { background: #fff; border-radius: 10px; padding: .6rem; display: flex; align-items: center; justify-content: center; }
.logos img { filter: grayscale(1); opacity: .8; max-height: 64px; width: auto; object-fit: contain; transition: filter .2s, opacity .2s; }
.logos li:hover img { filter: none; opacity: 1; }

/* Form */
.form { margin-top: 2rem; display: grid; gap: 1.2rem; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.field label { display: block; font-weight: 600; margin-bottom: .35rem; font-size: .98rem; }
.field input[type="text"], .field input[type="email"], .field textarea { width: 100%; font: inherit; color: var(--ink); background: #fff; border: 1.5px solid #b7c4da; border-radius: 10px; padding: .75rem .9rem; }
.field input:focus, .field textarea:focus { outline: 3px solid rgba(21,101,192,.3); border-color: var(--blue); }
.field.has-error input, .field.has-error textarea { border-color: #b3261e; }
.field--check { display: grid; grid-template-columns: auto 1fr; gap: .2rem .7rem; align-items: start; }
.field--check input { margin-top: .35rem; width: 1.1rem; height: 1.1rem; accent-color: var(--blue); }
.field--check label { font-weight: 400; margin: 0; }
.field--check .err { grid-column: 2; }
.err { color: #b3261e; font-size: .9rem; margin: .35rem 0 0; font-weight: 600; }
.botcheck { position: absolute; left: -9999px; }
.form .btn { justify-self: start; }
.form.is-sending .btn { opacity: .6; pointer-events: none; }
.status { padding: .9rem 1.1rem; border-radius: 10px; font-weight: 600; }
.status.is-ok { background: #e6f4ea; color: #0b5a2a; }
.status.is-bad { background: #fdecea; color: #8c1d18; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 2.2rem 0; background: #fff; }
.foot { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.foot p { margin: 0; color: var(--muted); }
.foot .small { margin-left: auto; font-size: .92rem; }
.foot a { color: var(--muted); }

/* Simple text pages (privacy, thank you) */
.page { padding: clamp(3rem, 7vw, 5rem) 0; }
.page h2 { font-size: 1.4rem; margin-top: 2rem; }

@media (max-width: 880px) {
  .cards { grid-template-columns: 1fr; }
  .founder { grid-template-columns: 1fr; }
  .founder-photo { max-width: 360px; }
  .logos { grid-template-columns: repeat(3, 1fr); }
  .nav { display: none; }
  .bar .btn { margin-left: auto; }
}
@media (max-width: 560px) {
  body { font-size: 1rem; }
  .row { grid-template-columns: 1fr; }
  .logos { grid-template-columns: repeat(2, 1fr); }
  .hero-mark { right: -140px; opacity: .07; }
  .join-inner .btn, .actions .btn { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}