:root {
  --white: #FFFFFF;
  --green: #13231A;
  --ink: #1F3D2C;
  --desc: #5B5B53;
  --field: #16301F;
  --field-border: #3E7A4E;
  --placeholder: #8FA896;
  --light: #F4F1EA;
  --sub: #A7B6AB;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; }

.split { display: flex; min-height: 100vh; }
.intro, .signup {
  flex: 1 1 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 56px;
}
.intro { background: var(--white); }
.signup { background: var(--green); }
.intro-inner, .signup-inner { width: 100%; max-width: 452px; }

/* logo + intro */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-bottom: 30px;
}
.logo .mark { height: 34px; width: auto; }
.logo .wordmark { height: 25px; width: auto; }

.tagline { line-height: 0; }
.tagline img { height: 104px; width: auto; max-width: 100%; }

.desc {
  margin-top: 24px;
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--desc);
}

/* signup */
.join { line-height: 0; }
.join img { height: 30px; width: auto; }

.sub {
  margin-top: 12px;
  margin-bottom: 26px;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--sub);
  max-width: 40ch;
}

.form { display: flex; flex-direction: column; gap: 12px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.field {
  font: inherit;
  font-size: 1rem;
  color: var(--light);
  background: var(--field);
  border: 1px solid var(--field-border);
  border-radius: 8px;
  padding: 13px 15px;
  width: 100%;
}
.field::placeholder { color: var(--placeholder); }
.field:focus-visible { outline: 2px solid var(--field-border); outline-offset: 1px; }

.submit {
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--ink);
  background: var(--light);
  border: none;
  border-radius: 8px;
  padding: 14px 16px;
  width: 100%;
  margin-top: 4px;
  transition: background 0.15s ease;
}
.submit:hover { background: #ECE7DD; }
.submit:focus-visible { outline: 2px solid var(--light); outline-offset: 2px; }

/* mobile: stack the two halves */
@media (max-width: 760px) {
  .split { flex-direction: column; min-height: 0; }
  .intro, .signup { flex: none; width: 100%; }
  .intro { padding: 56px 28px 44px; }
  .signup { padding: 40px 28px 48px; }
  .intro-inner, .signup-inner { max-width: 480px; }
  .tagline img { height: 76px; }
  .desc { margin-top: 18px; font-size: 1.0625rem; }
  .logo { margin-bottom: 24px; }
}

/* thank-you page */
.thanks {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 28px;
  background: var(--white);
}
.thanks-inner { max-width: 480px; }
.thanks-title {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--ink);
}

/* form submit states */
.submit:disabled { opacity: 0.72; cursor: default; }
.form-error { margin-top: 12px; font-size: 0.875rem; color: #E7A39B; }

.success-state .check { display: block; margin-bottom: 16px; }
.success-state .check svg { width: 46px; height: 46px; display: block; }
.success-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--light);
  margin-bottom: 6px;
}
.success-state .sub { margin: 0; max-width: 36ch; }