/* FineSet landing — brand colors from docs/brand.md */
:root {
  --indigo-300: #A6A6E9;
  --indigo-400: #8080DE;
  --indigo-500: #5B5BD6;
  --indigo-600: #4A47C4;
  --ink-950: #0E0E16;
  --ink-900: #16161F;
  --ink-800: #1F1F2B;
  --ink-700: #2F2F3A;
  --ink-400: #9595A1;
  --ink-200: #E3E3E8;
  --success: #22B07D;
  --error: #E5484D;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

/* The `hidden` attribute must always win, even over rules like
   `.join-form { display: flex }` — otherwise JS that toggles `el.hidden`
   can't hide a flex/grid element (author styles beat the UA [hidden] rule). */
[hidden] { display: none !important; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--ink-950);
  color: var(--ink-200);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--indigo-400); text-decoration: none; }
a:hover { color: var(--indigo-300); }

/* Buttons */
.btn {
  display: inline-block;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0.8rem 1.4rem;
  transition: background 0.15s, opacity 0.15s;
}
.btn-sm { padding: 0.5rem 1rem; font-size: 0.9rem; }
.btn-primary { background: var(--indigo-500); color: #fff; }
.btn-primary:hover { background: var(--indigo-600); }
.btn-primary:disabled { opacity: 0.5; cursor: default; }
.btn-ghost {
  background: transparent;
  color: var(--indigo-300);
  border: 1px solid var(--ink-700);
}
.btn-ghost:hover { background: var(--ink-800); }

/* Nav */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
}
.brand img { border-radius: 7px; display: block; }

/* Hero */
.hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.5rem 3rem;
  text-align: center;
}
.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.4rem);
  line-height: 1.1;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}
.hero .sub {
  font-size: 1.15rem;
  color: var(--ink-400);
  max-width: 560px;
  margin: 0 auto 2.25rem;
}

.join-form {
  display: flex;
  gap: 0.6rem;
  max-width: 480px;
  margin: 0 auto;
}
.join-form input[type="email"] {
  flex: 1;
  padding: 0.8rem 1rem;
  font-size: 1rem;
  border-radius: 8px;
  border: 1px solid var(--ink-700);
  background: var(--ink-900);
  color: #fff;
}
.join-form input::placeholder { color: var(--ink-400); }
.join-form input:focus {
  outline: none;
  border-color: var(--indigo-500);
}

.form-error {
  color: var(--error);
  font-size: 0.9rem;
  margin-top: 0.75rem;
}

.form-consent {
  max-width: 480px;
  margin: 0.9rem auto 0;
  font-size: 0.82rem;
  color: var(--ink-400);
}

/* Success state */
.success {
  max-width: 480px;
  margin: 1.5rem auto 0;
  padding: 1.5rem;
  background: var(--ink-900);
  border: 1px solid var(--ink-700);
  border-radius: 12px;
  text-align: left;
}
.success-pos { font-size: 1.25rem; color: #fff; margin-bottom: 0.5rem; }
.success-pos strong { color: var(--indigo-400); }
.success-hint { font-size: 0.95rem; color: var(--ink-400); margin-bottom: 0.75rem; }
.ref-row { display: flex; gap: 0.5rem; }
.ref-row input {
  flex: 1;
  padding: 0.6rem 0.8rem;
  font-size: 0.9rem;
  border-radius: 8px;
  border: 1px solid var(--ink-700);
  background: var(--ink-950);
  color: var(--indigo-300);
}
.referral-count {
  margin-top: 0.85rem;
  font-size: 0.9rem;
  color: var(--success);
}

.counter {
  margin-top: 2rem;
  font-size: 0.95rem;
  color: var(--ink-400);
}
.counter span { color: var(--ink-200); font-weight: 600; }

/* Sections */
.section {
  max-width: 960px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem;
  border-top: 1px solid var(--ink-800);
}
.section h2 {
  font-size: 1.8rem;
  color: #fff;
  text-align: center;
  letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
}
.section-sub {
  text-align: center;
  color: var(--ink-400);
  max-width: 560px;
  margin: 0 auto 2rem;
}

/* Demo code card */
.code-card {
  max-width: 640px;
  margin: 0 auto;
  background: var(--ink-900);
  border: 1px solid var(--ink-700);
  border-radius: 12px;
  overflow: hidden;
}
.code-head {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.7rem 1rem;
  background: var(--ink-800);
  border-bottom: 1px solid var(--ink-700);
}
.code-head .dot { width: 11px; height: 11px; border-radius: 50%; background: var(--ink-700); }
.code-file { margin-left: 0.6rem; font-size: 0.85rem; color: var(--ink-400); }
.code-card pre {
  padding: 1.25rem;
  overflow-x: auto;
}
.code-card code {
  font-family: "SF Mono", ui-monospace, Menlo, Monaco, "Cascadia Code", monospace;
  font-size: 0.82rem;
  color: var(--indigo-300);
  white-space: pre;
}
.demo-stats {
  text-align: center;
  color: var(--ink-400);
  margin-top: 1.75rem;
}
.demo-stats strong { color: var(--ink-200); }

/* Cards / steps */
.cards, .steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.card, .step {
  background: var(--ink-900);
  border: 1px solid var(--ink-800);
  border-radius: 12px;
  padding: 1.5rem;
}
.card h3, .step h3 { color: #fff; font-size: 1.1rem; margin-bottom: 0.5rem; }
.card p, .step p { color: var(--ink-400); font-size: 0.95rem; }
.step-n {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--indigo-500);
  color: #fff;
  font-weight: 700;
  margin-bottom: 0.85rem;
}

/* FAQ */
.faq-list { max-width: 720px; margin: 0 auto; }
.faq-item { border-top: 1px solid var(--ink-800); padding: 1.25rem 0; }
.faq-item:first-child { border-top: none; padding-top: 0; }
.faq-item h3 { color: #fff; font-size: 1.05rem; margin-bottom: 0.4rem; }
.faq-item p { color: var(--ink-400); }

.cta-bottom { text-align: center; }
.cta-bottom h2 { margin-bottom: 1.5rem; }

/* Legal pages (Terms, Privacy) */
.legal {
  max-width: 760px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}
.legal h1 {
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: 0.5rem;
}
.legal .updated {
  color: var(--ink-400);
  font-size: 0.9rem;
  margin-bottom: 2.5rem;
}
.legal h2 {
  font-size: 1.3rem;
  color: #fff;
  letter-spacing: -0.01em;
  margin: 2.5rem 0 0.75rem;
}
.legal h3 {
  font-size: 1.05rem;
  color: var(--ink-200);
  margin: 1.5rem 0 0.4rem;
}
.legal p, .legal li { color: var(--ink-200); }
.legal p { margin-bottom: 1rem; }
.legal ul { margin: 0 0 1rem 1.25rem; }
.legal li { margin-bottom: 0.5rem; }
.legal .lead { color: var(--ink-400); font-size: 1.1rem; margin-bottom: 1.5rem; }
.legal .intro-back { margin-bottom: 2rem; font-size: 0.95rem; }
.legal table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.5rem 0 1.5rem;
  font-size: 0.92rem;
}
.legal th, .legal td {
  text-align: left;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--ink-800);
  vertical-align: top;
}
.legal th { background: var(--ink-900); color: #fff; font-weight: 600; }
.legal td { color: var(--ink-400); }
.legal strong { color: #fff; font-weight: 600; }

/* Footer links */
.footer-links {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

/* Footer */
.footer {
  text-align: center;
  padding: 2.5rem 1.5rem;
  color: var(--ink-400);
  font-size: 0.9rem;
  border-top: 1px solid var(--ink-800);
}

@media (max-width: 680px) {
  .cards, .steps { grid-template-columns: 1fr; }
  .join-form { flex-direction: column; }
}