/* ==========================================================================
   Refer & Earn
   ========================================================================== */
.rf-page {
  --rf-ok: #15803d;
  --rf-soft: color-mix(in srgb, var(--text-primary) 4%, var(--bg-surface));
  max-width: 1000px;
  margin: 0 auto;
  padding-bottom: 3rem;
  flex-direction: column;
  gap: 1rem;
}

/* Only the open tab is shown (the base .tab-view rule hides the rest) */
.tab-view.rf-page.active { display: flex; }

.theme-dark .rf-page { --rf-ok: #4ade80; }
.rf-page [hidden] { display: none !important; }

.rf-hero {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.4rem 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--text-primary);
  color: var(--bg-surface);
}

.rf-hero-icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  background: color-mix(in srgb, var(--bg-surface) 15%, transparent);
  flex-shrink: 0;
}

.rf-hero h2 { font-size: 1.45rem; font-weight: 700; letter-spacing: -0.02em; }
.rf-hero p { opacity: 0.8; font-size: 0.92rem; margin-top: 0.25rem; }

.rf-notice {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  font-size: 0.88rem;
  color: var(--text-primary);
}

.rf-notice .btn { margin-left: auto; }
.rf-notice.is-done i { color: var(--rf-ok); }

.rf-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 1rem; }

.rf-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.15rem 1.25rem;
}

.rf-card h3 { font-size: 1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 0.8rem; }

.rf-link-row { display: flex; gap: 0.5rem; }
.rf-link-row .form-control { flex: 1; min-width: 0; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.82rem; }

.rf-code-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 0.75rem;
  font-size: 0.84rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.rf-code-row code {
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  background: var(--rf-soft);
  border: 1px solid var(--border-color);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.03em;
}

.rf-share-buttons { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }

.rf-stats { display: flex; flex-direction: column; justify-content: space-around; gap: 0.75rem; }
.rf-stat { display: flex; align-items: baseline; gap: 0.6rem; }
.rf-stat-value { font-size: 1.6rem; font-weight: 700; color: var(--text-primary); font-variant-numeric: tabular-nums; min-width: 2.5ch; }
.rf-stat-label { font-size: 0.84rem; color: var(--text-secondary); }

.rf-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.rf-steps li { display: flex; gap: 0.7rem; }
.rf-steps strong { font-size: 0.9rem; color: var(--text-primary); }
.rf-steps p { font-size: 0.82rem; color: var(--text-secondary); margin-top: 0.15rem; }

.rf-step-num {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  font-weight: 700;
  border: 1.5px solid var(--text-primary);
  color: var(--text-primary);
  flex-shrink: 0;
}

.rf-friends { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; }
.rf-friends li { display: flex; align-items: center; gap: 0.75rem; padding: 0.65rem 0; border-top: 1px solid var(--border-color); }
.rf-friends li:first-child { border-top: none; }

.rf-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 700;
  background: var(--rf-soft);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  flex-shrink: 0;
}

.rf-friend-name { display: flex; flex-direction: column; font-weight: 600; font-size: 0.9rem; color: var(--text-primary); flex: 1; min-width: 0; }
.rf-friend-name small { font-weight: 400; font-size: 0.76rem; color: var(--text-secondary); }
.rf-status { font-size: 0.78rem; color: var(--text-secondary); text-align: right; }
.rf-status.is-joined { color: var(--rf-ok); font-weight: 600; }
.rf-empty { font-size: 0.86rem; color: var(--text-secondary); padding: 0.5rem 0; }

@media (max-width: 820px) {
  .rf-grid { grid-template-columns: 1fr; }
  .rf-steps { grid-template-columns: 1fr; }
  .rf-link-row { flex-direction: column; }
  .rf-friends li { flex-wrap: wrap; }
  .rf-status { text-align: left; width: 100%; padding-left: calc(34px + 0.75rem); }
}