.login-page {
  min-height: 100vh;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 18%, rgba(37, 99, 235, 0.08), transparent 30%),
    linear-gradient(135deg, #f8fafc 0%, #eef3f8 48%, #f6f8fb 100%);
}

.auth-page {
  width: 100%;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px;
}

.auth-card {
  width: min(420px, 100%);
  display: grid;
  gap: 26px;
  padding: 34px;
  border: 1px solid rgba(203, 213, 225, 0.86);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 24px 70px rgba(15, 23, 42, 0.13);
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.auth-brand-mark {
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: #0f172a;
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  box-shadow: 0 14px 28px rgba(15, 23, 42, 0.22);
}

.auth-brand-text {
  min-width: 0;
}

.auth-brand-text h1 {
  margin: 0;
  color: var(--color-text);
  font-size: 22px;
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: 0;
}

.auth-brand-text p {
  margin: 6px 0 0;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

.auth-form {
  display: grid;
  gap: 15px;
}

.auth-field {
  gap: 7px;
}

.auth-input {
  height: 42px;
  border-radius: 10px;
  padding: 0 12px;
  font-size: 14px;
}

.auth-submit {
  width: 100%;
  height: 42px;
  margin-top: 2px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
}

.math-captcha {
  --login-captcha-height: 42px;
  width: 100%;
  display: grid;
  gap: 7px;
}

.math-captcha-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-weight: 700;
}

.login-captcha-row {
  width: 100%;
  display: grid;
  grid-template-columns: 6fr 4fr;
  align-items: stretch;
  gap: 8px;
}

.math-captcha-image-button {
  height: var(--login-captcha-height);
  min-height: var(--login-captcha-height);
  max-height: var(--login-captcha-height);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 0 6px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-surface-subtle);
  cursor: pointer;
  box-sizing: border-box;
}

.math-captcha-image-button:hover {
  border-color: var(--color-primary);
  background: #f8fafc;
}

.math-captcha-image {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  box-sizing: border-box;
}

.math-captcha-input {
  width: 100%;
  min-width: 0;
  height: var(--login-captcha-height);
  min-height: var(--login-captcha-height);
  max-height: var(--login-captcha-height);
  box-sizing: border-box;
  text-align: center;
}

.math-captcha-status {
  min-height: 18px;
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  line-height: 1.4;
}

.math-captcha.is-loading .math-captcha-status {
  color: var(--color-primary);
}

.math-captcha.is-passed .math-captcha-image-button {
  border-color: rgba(22, 163, 74, 0.45);
  background: var(--color-success-soft);
}

.math-captcha.is-passed .math-captcha-status {
  color: var(--color-success);
  font-weight: 700;
}

.math-captcha.is-error .math-captcha-status {
  color: var(--color-danger);
}

@media (max-width: 520px) {
  .auth-page {
    padding: 18px;
  }

  .auth-card {
    padding: 24px;
  }

  .login-captcha-row {
    gap: 8px;
  }
}