body {
  height: 100%;
  background: #f4f6ff;
}

.auth-container {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 clamp(0.8rem, 3vw, 1.4rem);
}

.auth-card {
  background: #ffffff;
  border-radius: 18px;
  width: 400px;
  padding: 2.5rem clamp(1.9rem, 4vw, 2.4rem) 2.7rem;
  box-shadow: 0 48px 120px rgba(46, 64, 138, 0.18);
}

.auth-title {
  font-size: clamp(2rem, 4vw, 2.25rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 2.15rem;
  color: #0f172a;
}

.mb-3 {
  margin-bottom: 1.25rem;
}

.mb-4 {
  margin-bottom: 1.8rem;
}

.form-label {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.95rem;
  color: #1f2937;
}

.fw-semibold {
  font-weight: 600;
}

.form-control {
  width: 100%;
  padding: 0.85rem 1.05rem;
  border-radius: 12px;
  border: 1px solid #d9e2ff;
  font-size: 1.02rem;
  background-color: #ffffff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
  outline: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  border: none;
  padding: 0.95rem 1.25rem;
  font-weight: 600;
  line-height: 1.1;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover,
.btn:focus {
  transform: translateY(-1px);
  box-shadow: 0 18px 36px rgba(34, 84, 225, 0.25);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #3f89f8, #1f4fdd);
}

.btn-primary:hover,
.btn-primary:focus {
  background: linear-gradient(135deg, #2f6de2, #1b45c4);
}

.btn-lg {
  font-size: 1.02rem;
}

.w-100 {
  width: 100%;
}

.auth-alert {
  border-radius: 16px;
  padding: 1.2rem 1.5rem;
  border: 1px solid transparent;
  background: rgba(59, 130, 246, 0.08);
  color: #1d4ed8;
}

.auth-alert.success {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.32);
  color: #0f766e;
}

.auth-alert.error {
  background: rgba(248, 113, 113, 0.12);
  border-color: rgba(239, 68, 68, 0.32);
  color: #b91c1c;
}

.text-danger {
  color: #b91c1c;
  font-size: 0.9rem;
  margin-top: 0.35rem;
  display: block;
}

.auth-details-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem 1rem;
}

.auth-details-label {
  font-weight: 600;
  color: #1f2937;
  margin: 0;
}

.auth-details-value {
  margin: 0;
  color: #4b5563;
}

.text-break {
  word-break: break-word;
}

.validation-summary-valid,
.field-validation-valid {
  display: none;
}

@media (min-width: 640px) {
  .auth-details-list {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  }
}

@media (max-width: 640px) {
  .auth-card {
    padding: 2.2rem 1.75rem 2.4rem;
  }

  .auth-title {
    margin-bottom: 1.85rem;
  }
}

@media (max-width: 420px) {
  .auth-container {
    padding: 0 0.75rem;
  }

  .auth-card {
    padding: 2rem 1.4rem 2.2rem;
    border-radius: 18px;
  }

  .btn {
    padding: 0.9rem 1.05rem;
  }
}