/* OriginTwin landing — minimal dark theme matching the app palette. */
:root {
  --bg: #0c0a09;
  --bg-elev: #1c1917;
  --border: #292524;
  --fg: #f5f5f4;
  --fg-mute: #a8a29e;
  --fg-faint: #78716c;
  --gold: #c4a47c;
  --gold-strong: #d8b88e;
  --error: #ef4444;
  --max-w: 1080px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto,
    "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--gold); text-decoration: none; }
a:hover { color: var(--gold-strong); }
em { color: var(--gold); font-style: normal; }
strong { color: var(--fg); }

/* ---------- Header / footer ---------- */
.site-header {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max-w); margin: 0 auto; padding: 22px 24px;
}
.brand {
  display: inline-flex; align-items: center; gap: 12px;
  color: var(--fg); font-weight: 700; letter-spacing: 0.3px;
  font-size: 19px;
}
.brand img { display: block; }
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: 96px; padding: 32px 24px;
  color: var(--fg-faint); text-align: center;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 18px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600; font-size: 15px;
  cursor: pointer; transition: transform 0.05s ease, background 0.15s ease;
  text-decoration: none;
}
.btn-lg { padding: 14px 22px; font-size: 16px; }
.btn-primary {
  background: var(--gold); color: var(--bg);
}
.btn-primary:hover { background: var(--gold-strong); color: var(--bg); }
.btn-primary:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-ghost {
  background: transparent; color: var(--fg);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--bg-elev); color: var(--fg); }

/* ---------- Hero ---------- */
main { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.hero {
  text-align: center;
  padding: 64px 0 88px;
}
.hero h1 {
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.08; letter-spacing: -0.02em;
  margin: 0 0 22px;
  font-weight: 800;
}
.hero-sub {
  max-width: 700px; margin: 0 auto;
  color: var(--fg-mute); font-size: 19px; line-height: 1.55;
}
.hero-cta {
  display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
  margin-top: 36px;
}

/* ---------- Three-up section ---------- */
.three-up {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin: 32px 0;
}
.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 26px;
}
.card-num {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 28px; font-weight: 600;
  color: var(--gold); letter-spacing: 0.04em;
  margin-bottom: 8px;
  opacity: 0.85;
  text-align: center;
}
.card h3 {
  font-size: 22px; margin: 8px 0 10px; font-weight: 700;
  text-align: center;
}
.card p { color: var(--fg-mute); margin: 0; }

/* ---------- Why list ---------- */
.why { padding: 64px 0 16px; }
.why h2 { font-size: 28px; margin: 0 0 18px; text-align: center; }
.why-list {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: 14px;
}
.why-list li {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px 20px;
  color: var(--fg-mute);
}

/* ---------- Final CTA ---------- */
.cta-final {
  text-align: center; padding: 88px 0 16px;
}
.cta-final h2 {
  font-size: clamp(24px, 3.6vw, 36px);
  margin: 0 0 10px;
}
.cta-final p { color: var(--fg-mute); margin: 0 0 24px; }

/* ---------- Form pages ---------- */
.form-page {
  max-width: 640px; padding: 32px 24px 16px;
}
.form-intro h1 {
  font-size: clamp(28px, 4vw, 40px);
  margin: 0 0 12px;
}
.form-intro p { color: var(--fg-mute); margin: 0 0 28px; }
.form { display: grid; gap: 16px; }
.field { display: grid; gap: 6px; }
.field span { color: var(--fg); font-weight: 600; font-size: 14px; }
.field span em { color: var(--fg-faint); font-style: normal; font-weight: 400; }
.field input, .field textarea {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--fg);
  border-radius: 12px;
  padding: 12px 14px; font-size: 16px;
  font-family: inherit;
}
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--gold);
}
.field-check {
  display: flex; gap: 10px; align-items: flex-start;
  color: var(--fg-mute); font-size: 14px;
}
.field-check input { margin-top: 4px; accent-color: var(--gold); }
.form-status {
  margin: 4px 0 0; min-height: 20px; font-size: 14px; color: var(--fg-mute);
}
.form-status.error { color: var(--error); }

.thanks {
  text-align: center; padding: 80px 24px 16px;
}
.thanks h1 { font-size: clamp(28px, 4vw, 40px); margin: 0 0 14px; }
.thanks p { color: var(--fg-mute); max-width: 480px; margin: 0 auto 28px; }

/* ---------- Login page ---------- */
.login-body {
  min-height: 100vh; display: grid; place-items: center;
  padding: 24px;
}
.login-page {
  width: 100%; max-width: 360px; text-align: center;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 36px 28px;
}
.login-logo { margin: 0 auto 18px; display: block; }
.login-page h1 { font-size: 24px; margin: 0 0 6px; letter-spacing: 0.5px; }
.login-sub { color: var(--fg-mute); font-size: 14px; margin: 0 0 24px; }
.login-form { text-align: left; }

/* ---------- Small screens ---------- */
@media (max-width: 560px) {
  .site-header { padding: 14px 16px; gap: 8px; flex-wrap: nowrap; }
  /* Tighten the header CTA so it can't push the brand off-screen on
     narrow viewports. The hero CTA below remains full-size. */
  .site-header .btn { padding: 8px 12px; font-size: 13px; line-height: 1.1; }
  .brand { font-size: 17px; gap: 10px; }
  .brand img { height: 34px; }
  .hero { padding: 40px 0 56px; }
  .hero h1 { font-size: 34px; }
  .hero-sub { font-size: 17px; }
  .three-up { gap: 12px; }
  .card { padding: 22px 20px; }
}