/* Auth page layout */
.auth-page {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 24px 16px;
}

.auth-card {
  width: 100%;
  max-width: 480px;
}

/* Wordmark */
.auth-wordmark {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  color: var(--white);
  text-align: center;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.auth-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  margin-bottom: 32px;
}

/* Form sections — toggle visibility */
.auth-section {
  display: none;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.auth-section.active {
  display: block;
  opacity: 1;
}

/* Inputs */
.form-group {
  margin-bottom: 16px;
  position: relative;
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  padding: 12px 14px;
  background: var(--gray-900);
  border: 1px solid var(--gray-800);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast);
}

.form-input::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent);
}

.form-input.input-error {
  border-color: var(--error);
}

/* Username prefix */
.input-with-prefix {
  position: relative;
}

.input-prefix {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 0.9375rem;
  pointer-events: none;
}

.input-with-prefix .form-input {
  padding-left: 28px;
}

/* Username availability indicator */
.username-status {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.75rem;
}

.username-status.available {
  color: var(--success);
}

.username-status.taken {
  color: var(--error);
}

.username-status.checking {
  color: var(--text-secondary);
}

/* Password toggle */
.input-with-toggle {
  position: relative;
}

.input-with-toggle .form-input {
  padding-right: 48px;
}

.password-toggle {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  cursor: pointer;
  padding: 4px;
  transition: color var(--transition-fast);
}

.password-toggle:hover {
  color: var(--text-primary);
}

.password-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Validation error messages */
.field-error {
  font-size: 0.75rem;
  color: var(--error);
  margin-top: 4px;
  min-height: 0;
  overflow: hidden;
  transition: all var(--transition-fast);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast);
  position: relative;
}

.btn:active {
  transform: scale(0.985);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--white);
  color: var(--black);
}

.btn-primary:hover:not(:disabled) {
  background: var(--gray-200);
}

.btn-google {
  background: var(--white);
  color: #3c4043;
  border: 1px solid var(--gray-200);
  font-weight: 500;
}

.btn-google:hover:not(:disabled) {
  background: var(--gray-100);
}

.btn-google svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

/* Button loading state */
.btn.loading .btn-text {
  visibility: hidden;
}

.btn.loading .btn-spinner {
  display: block;
}

.btn-spinner {
  display: none;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.btn-primary .btn-spinner .spinner {
  border-top-color: var(--black);
}

/* Divider */
.auth-divider {
  display: flex;
  align-items: center;
  gap: 16px;
  margin: 24px 0;
  color: var(--text-secondary);
  font-size: 0.8125rem;
}

.auth-divider::before,
.auth-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--gray-800);
}

/* Auth links */
.auth-links {
  margin-top: 20px;
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.auth-links a,
.auth-link {
  color: var(--accent);
  cursor: pointer;
  background: none;
  border: none;
  font-size: inherit;
  padding: 0;
  transition: opacity var(--transition-fast);
}

.auth-link:hover,
.auth-links a:hover {
  opacity: 0.85;
}

.auth-forgot {
  display: block;
  text-align: center;
  margin-top: 12px;
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

.auth-forgot:hover {
  color: var(--accent);
}

/* Success / info messages */
.auth-message {
  text-align: center;
  padding: 32px 0;
}

.auth-message-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.auth-message h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.auth-message p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.5;
  margin-bottom: 24px;
}

/* Responsive — mobile: full-bleed card */
@media (max-width: 480px) {
  .auth-page {
    padding: 40px 20px 24px;
    align-items: flex-start;
  }

  .auth-card {
    max-width: 100%;
  }

  .auth-wordmark {
    font-size: 1.75rem;
  }
}