:root {
  --ink: #1a1612;
  --ink-soft: #2a221a;
  --muted: #5a4a32;
  --rule: #c8ba9d;
  --paper: #f3ead4;
  --paper-2: #efe6d2;
  --red: #7a1515;
  --hand: Caveat, "Special Elite", cursive;
  --serif: "Source Serif 4", Georgia, serif;
  --sans: Inter, system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  background:
    radial-gradient(circle, rgba(42, 34, 26, .18) .45px, transparent .6px) 0 0 / 3px 3px,
    linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
}

a { color: var(--red); }
a:focus-visible,
.refer-btn:focus-visible {
  outline: 3px solid var(--red);
  outline-offset: 3px;
}

.refer-top,
.refer-sheet {
  width: min(720px, calc(100% - 2rem));
  margin-left: auto;
  margin-right: auto;
}

.refer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.2rem 0 0.4rem;
}

.refer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: inherit;
  text-decoration: none;
}

.refer-brand img {
  width: 42px;
  height: 42px;
  object-fit: cover;
  border-radius: 50%;
  border: 2px solid var(--ink);
}

.refer-brand span { display: grid; line-height: 1.05; }
.refer-brand strong { font-size: 1.05rem; }
.refer-brand small {
  margin-top: 0.15rem;
  font-family: var(--sans);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.refer-back {
  font-family: var(--sans);
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--ink-soft);
}

.refer-back:hover { color: var(--red); }

.refer-sheet {
  padding: 1.5rem 0 3.5rem;
}

.refer-kicker {
  margin: 0 0 0.35rem;
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
}

h1 {
  margin: 0 0 0.7rem;
  font-family: var(--hand);
  font-size: clamp(2.4rem, 7vw, 3.4rem);
  font-weight: 700;
  line-height: 0.95;
}

.refer-lede {
  margin: 0 0 0.85rem;
  max-width: 58ch;
  font-size: 1.12rem;
  line-height: 1.5;
}

.refer-how {
  margin: 0 0 1.6rem;
  max-width: 58ch;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--ink);
  color: var(--ink-soft);
  line-height: 1.5;
}

.refer-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
}

.refer-split h2 {
  margin: 0 0 0.45rem;
  font-family: var(--hand);
  font-size: 1.55rem;
  font-weight: 700;
}

.refer-split ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.refer-split li {
  padding: 0.45rem 0;
  border-bottom: 1px dotted var(--rule);
  line-height: 1.4;
}

.refer-split b {
  display: block;
  font-family: var(--sans);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.12rem;
}

.refer-note {
  margin: 0 0 1.4rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

.refer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 0 0 0.9rem;
}

.refer-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7rem 1rem;
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink);
  border: 1.5px solid var(--ink);
  background: transparent;
}

.refer-btn:hover { background: var(--ink); color: var(--paper); }

.refer-btn--ink {
  background: var(--ink);
  color: var(--paper);
}

.refer-btn--ink:hover { background: var(--red); border-color: var(--red); }

.refer-existing {
  margin: 0 0 0.7rem;
  color: var(--ink-soft);
  line-height: 1.45;
}

.refer-fine {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
}

@media (max-width: 640px) {
  .refer-split { grid-template-columns: 1fr; }
  .refer-top { align-items: flex-start; }
  .refer-actions { flex-direction: column; }
  .refer-btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .refer-btn { transition: none; }
}