.auth-screen {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
}
.auth-box {
  background: var(--bg);
  border-radius: 20px; width: 100%; max-width: 480px;
  box-shadow: var(--shadow-lg), 0 0 40px rgba(201,168,76,.15);
  border: 2px solid var(--gold-dark);
  overflow: hidden;
}
.auth-header {
  background: var(--ink); color: var(--bg);
  padding: 28px 32px; text-align: center;
  position: relative; overflow: hidden;
}
.auth-header::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}
.auth-header .logo {
  font-family: var(--font-display);
  font-size: 28px; letter-spacing: -1px;
  background: linear-gradient(135deg, var(--gold-light), var(--gold));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.auth-header .sub {
  font-family: var(--font-display);
  font-size: 14px; letter-spacing: 3px;
  color: rgba(201,168,76,.6); margin-top: 4px;
}
.auth-body { padding: 28px 32px; }
.auth-tabs { display: flex; gap: 4px; margin-bottom: 24px; }
.auth-tab {
  flex: 1; padding: 10px; text-align: center;
  border: 2px solid var(--gold-dark); border-radius: 8px;
  font-weight: 700; font-size: 13px; cursor: pointer;
  text-transform: uppercase; letter-spacing: 1px;
  transition: all .2s;
  background: var(--bg); color: var(--ink);
}
.auth-tab.active { background: var(--gold); color: #0a0a0a; border-color: var(--gold); }
.auth-form { display: none; }
.auth-form.active { display: block; }
.form-group { margin-bottom: 14px; }
.form-group label {
  display: block; font-size: 12px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 1px;
  color: var(--muted); margin-bottom: 5px;
}
.form-group input,
.form-group select {
  width: 100%; padding: 11px 14px;
  border: 2px solid var(--line); border-radius: 8px;
  font-family: var(--font-body); font-size: 14px;
  transition: border .2s;
  background: var(--bg); color: var(--ink);
}
.form-group input:focus,
.form-group select:focus {
  outline: none; border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201,168,76,.15);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.btn-auth {
  width: 100%; padding: 13px;
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: #0a0a0a;
  border: none; border-radius: 8px;
  font-family: var(--font-body);
  font-weight: 700; font-size: 14px;
  text-transform: uppercase; letter-spacing: 1px;
  cursor: pointer; transition: all .2s; margin-top: 6px;
}
.btn-auth:hover { background: linear-gradient(135deg, var(--gold-light), var(--gold)); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(201,168,76,.4); }
.btn-auth:disabled { background: var(--muted); cursor: not-allowed; transform: none; }
.auth-error {
  background: var(--danger); color: var(--bg);
  padding: 10px 14px; border-radius: 6px;
  font-size: 12px; margin-bottom: 12px; display: none;
}
.btn-google {
  width: 100%; padding: 12px;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  background: var(--bg); color: var(--ink);
  border: 2px solid var(--line); border-radius: 8px;
  font-family: var(--font-body); font-weight: 600; font-size: 14px;
  cursor: pointer; transition: all .2s; margin-bottom: 4px;
}
.btn-google:hover { border-color: var(--ink); background: var(--bg-soft); }
.auth-divider {
  display: flex; align-items: center; gap: 12px;
  margin: 14px 0; color: var(--muted); font-size: 12px;
}
.auth-divider::before, .auth-divider::after {
  content: ''; flex: 1; height: 1px; background: var(--line);
}
.auth-footer {
  text-align: center; margin-top: 16px;
  font-size: 12px; color: var(--muted);
}
.auth-footer a { color: var(--gold-dark); font-weight: 600; }

@media (max-width: 480px) {
  .form-row { grid-template-columns: 1fr; }
  .auth-body { padding: 20px; }
}