/* ===== Pantallas de autenticación (login / registro / invitación) ===== */
.auth-body{
  min-height:100vh;margin:0;
  font-family:var(--font-ui);color:var(--text-main);
  background:
    radial-gradient(1100px 560px at 100% -10%, rgba(16,198,212,.18), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(11,126,243,.12), transparent 60%),
    var(--bg);
  display:grid;place-items:center;padding:24px;
}
.auth-card{
  width:100%;max-width:404px;background:var(--surface);
  border:1px solid var(--border);border-radius:var(--r-xl);
  padding:38px 34px;box-shadow:var(--sh-lg);
}
.auth-brand{
  display:inline-flex;align-items:center;gap:12px;
  font-family:var(--font-display);font-weight:700;font-size:20px;
  color:var(--primary);margin-bottom:24px;
}
.auth-logo{
  width:38px;height:38px;border-radius:11px;background:var(--grad);
  display:grid;grid-template-columns:1fr 1fr;gap:3px;padding:9px;box-shadow:var(--sh);
}
.auth-logo span{background:rgba(255,255,255,.9);border-radius:3px}
.auth-logo span:nth-child(2),.auth-logo span:nth-child(3){background:rgba(255,255,255,.55)}
.auth-title{font-family:var(--font-display);font-size:24px;font-weight:700;letter-spacing:-.02em;margin:0 0 4px}
.auth-sub{color:var(--text-muted);font-size:13.5px;margin:0 0 22px;line-height:1.5}
.auth-sub strong{color:var(--text-main)}
.auth-card .form{max-width:none;gap:16px}
.auth-card form .btn{width:100%;justify-content:center;padding:13px;font-size:14px}
.auth-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
.auth-foot{margin-top:22px;font-size:13px;color:var(--text-muted);text-align:center}
.auth-foot a{color:var(--accent-dark);font-weight:600}