:root {
  --bg: #fafaf9;
  --surface: #ffffff;
  --text: #16161a;
  --muted: #6b6b70;
  --border: #e6e6e3;
  --accent: #111111;
  --accent-contrast: #ffffff;
  --ok: #1f7a4d;
  --radius: 10px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Inter, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.5;
}
a { color: inherit; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-wrap: wrap;
  gap: 12px;
}
.brand { font-weight: 800; text-decoration: none; font-size: 1.1rem; }
.brand span { color: var(--muted); font-weight: 500; }
.topbar nav { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.topbar nav a { text-decoration: none; font-weight: 500; }
.cta {
  background: var(--accent);
  color: var(--accent-contrast) !important;
  padding: 10px 18px;
  border-radius: var(--radius);
  text-decoration: none !important;
  font-weight: 600;
  border: none;
  cursor: pointer;
  display: inline-block;
}
.link-btn { background: none; border: none; font: inherit; cursor: pointer; color: var(--muted); }
main { max-width: 1000px; margin: 0 auto; padding: 40px 24px 80px; }
.hero { text-align: center; padding: 60px 0 40px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); font-weight: 800; letter-spacing: -0.02em; margin-bottom: 16px; }
.hero p { color: var(--muted); max-width: 560px; margin: 0 auto 28px; font-size: 1.1rem; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 20px; margin-top: 40px; }
.step { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.step span { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 700; margin-bottom: 12px; }
.step h3 { margin: 0 0 6px; }
.step p { color: var(--muted); margin: 0; }

.auth-box, .referral { max-width: 440px; margin: 0 auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; }
.auth-box h1, .referral h1 { font-size: 1.6rem; margin-top: 0; }
form label { display: block; margin-bottom: 14px; font-weight: 600; font-size: 0.9rem; }
form input, form textarea {
  display: block; width: 100%; margin-top: 6px; padding: 12px; font-size: 16px;
  border: 1px solid var(--border); border-radius: 8px; font-family: inherit;
}
.error { color: #b3261e; background: #fdecea; padding: 10px 14px; border-radius: 8px; }
.success { color: var(--ok); background: #e9f6ef; padding: 10px 14px; border-radius: 8px; }
.muted { color: var(--muted); }

.dash-head h1 { margin-bottom: 20px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 14px; }
.stat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.stat strong { display: block; font-size: 1.8rem; }
.stat span { color: var(--muted); font-size: 0.85rem; }

.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin-top: 24px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; }
.box { border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
@media (max-width: 700px) { .two-col { grid-template-columns: 1fr; } }

.table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.table th, .table td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); font-size: 0.92rem; }
.table th { color: var(--muted); font-weight: 600; }
.badge { background: #f0f0ee; padding: 4px 10px; border-radius: 999px; font-size: 0.8rem; }
.badge-ok { background: #e9f6ef; color: var(--ok); }
.small-btn { padding: 6px 12px; border-radius: 6px; border: 1px solid var(--border); background: #fff; cursor: pointer; font-size: 0.85rem; }
.small-btn.danger { color: #b3261e; border-color: #f3c9c5; }

.footer { text-align: center; padding: 24px; color: var(--muted); font-size: 0.85rem; }