.auth-form,
form.auth-form {
  width: min(420px, 92vw);
  margin: 24px auto;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 18px 16px;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.06);
  text-align: center;
}
.auth-form h1,
form.auth-form h1 {
  margin: 4px 0 8px;
  font-size: 22px;
  color: #0f172a;
  font-weight: 900;
}
.auth-lead { margin: 8px 0; color: #6b7280; font-size: 14px; }
.auth-sub { margin: 0; color: #6b7280; font-size: 13px; }
.auth-field {
  margin: 10px 0;
  display: grid;
  gap: 6px;
}
.auth-field label {
  font-size: 13px;
  color: #4b5563;
  font-weight: 700;
}
.auth-field input[type="text"],
.auth-field input[type="email"],
.auth-field input[type="tel"],
.auth-field input[type="password"] {
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
}
.auth-actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
}
.social-actions {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}
.auth-kakao-only {
  margin-top: 18px;
}
.kakao-btn {
  border: 0;
  background: #fee500;
  color: #191600;
  font-weight: 800;
  padding: 14px 16px;
  border-radius: 999px;
  width: 100%;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
}
.kakao-btn .ico { font-size: 18px; }
.auth-secondary {
  margin-top: 12px;
  font-size: 13px;
}
.auth-secondary a {
  color: #6b7280;
  text-decoration: underline;
}
.auth-primary {
  border: 0;
  background: #2563eb;
  color: #fff;
  font-weight: 800;
  padding: 12px 14px;
  border-radius: 10px;
  width: 100%;
  cursor: pointer;
}
.auth-help {
  font-size: 12px;
  color: #6b7280;
  text-align: center;
  margin-top: 8px;
}
.auth-error {
  margin: 6px 0 0;
  color: #b91c1c;
  font-size: 12px;
  min-height: 16px;
}

.otp-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}
.otp-row input {
  flex: 1 1 auto;
  min-width: 0;
}
.otp-send-btn {
  flex: 0 0 auto;
  border: 1px solid #2563eb;
  background: #eff6ff;
  color: #1d4ed8;
  font-weight: 700;
  font-size: 13px;
  padding: 0 12px;
  border-radius: 10px;
  cursor: pointer;
  white-space: nowrap;
}
.otp-send-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.auth-demo-hint {
  margin-top: 8px;
  padding: 10px 12px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 10px;
  font-size: 12px;
  color: #92400e;
  text-align: left;
  line-height: 1.5;
}
.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 0 4px;
  color: #9ca3af;
  font-size: 12px;
}
.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: #e5e7eb;
}