:root {
  --bg: #f7efe3;
  --surface: #fffaf3;
  --ink: #2b211b;
  --muted: #6b5a4e;
  --accent: #c4562f;
  --accent-ink: #ffffff;
  --accent-soft: #f3d9c9;
  --line: #e6d6c3;
  --ok: #2f7a4a;
  --err: #b3261e;
  --radius: 18px;
  --display: "Fraunces", Georgia, serif;
  --body: "Atkinson Hyperlegible", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1714;
    --surface: #2a221d;
    --ink: #f5ebe0;
    --muted: #c3b2a3;
    --accent: #e8794f;
    --accent-ink: #1d1714;
    --accent-soft: #4a3226;
    --line: #3e322a;
    --ok: #7ccf98;
    --err: #ff8a80;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.6;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* Header */
.top {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1080px; margin: 0 auto; padding: 20px 16px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--display); font-weight: 700; font-size: 1.25rem;
  text-decoration: none;
}
.top-cta {
  font-weight: 700; text-decoration: none; color: var(--accent);
  padding: 8px 4px;
}
.top-cta:hover { text-decoration: underline; }

main { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* Hero */
.hero { padding: 72px 0 88px; max-width: 760px; }
h1 {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 4rem); line-height: 1.05;
  margin: 0 0 20px; letter-spacing: -0.01em;
}
h1 em { font-style: italic; font-weight: 500; color: var(--accent); }
.lede { font-size: clamp(1.2rem, 2.4vw, 1.4rem); color: var(--muted); max-width: 30em; margin: 0 0 32px; }

.button {
  display: inline-block; border: 0; cursor: pointer;
  background: var(--accent); color: var(--accent-ink);
  font: 700 1.0625rem/1 var(--body);
  padding: 16px 26px; border-radius: 999px; text-decoration: none;
  transition: transform .15s ease, filter .15s ease;
}
.button:hover { filter: brightness(1.05); transform: translateY(-1px); }
.button:focus-visible, input:focus-visible, .top-cta:focus-visible {
  outline: 3px solid var(--accent); outline-offset: 3px;
}
.button[disabled] { opacity: .6; cursor: progress; transform: none; }

/* Join */
.join { padding-bottom: 80px; scroll-margin-top: 16px; }
.join-card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 6px);
  padding: clamp(24px, 5vw, 48px); max-width: 720px; margin: 0 auto;
}
.join h2 {
  font-family: var(--display); font-size: clamp(1.6rem, 4vw, 2.2rem);
  line-height: 1.15; margin: 0 0 24px;
}

.fields { display: grid; grid-template-columns: 1fr 1.4fr; gap: 16px; }
.field { display: block; margin-bottom: 16px; }
.field span { display: block; font-weight: 700; margin-bottom: 6px; font-size: .9375rem; }
.field small { font-weight: 400; color: var(--muted); }
input[type="text"], input[type="email"] {
  width: 100%; font: inherit; color: var(--ink);
  background: var(--bg); border: 1.5px solid var(--line);
  border-radius: 12px; padding: 12px 14px;
}
input::placeholder { color: var(--muted); opacity: .7; }
input[aria-invalid="true"] { border-color: var(--err); }

.trap { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-status { min-height: 1.6em; margin: 14px 0 0; font-weight: 700; }
.form-status.ok { color: var(--ok); }
.form-status.err { color: var(--err); }

.foot {
  text-align: center; color: var(--muted); font-size: .9375rem;
  padding: 24px 16px 40px; border-top: 1px solid var(--line);
}
.foot p { margin: 0; }

/* Responsive */
@media (max-width: 720px) {
  .hero { padding: 40px 0 56px; }
  .fields { grid-template-columns: 1fr; gap: 0; }
}
@media (max-width: 520px) {
  .button { width: 100%; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}