/* ─── Auth Layout ─── */

.auth-layout {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--color-bg-page);
  padding: var(--space-4);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
}

.auth-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.auth-logo {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--space-5);
  border-radius: var(--radius-lg);
}

.auth-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-2);
}

.auth-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.auth-form .form-group {
  margin-bottom: var(--space-5);
}

.auth-form .form-input {
  height: 40px;
  font-size: var(--text-md);
}

.auth-form .btn {
  width: 100%;
  height: 40px;
}

.auth-error {
  padding: var(--space-3);
  background: var(--color-danger-bg);
  border: 1px solid var(--color-danger-border);
  border-radius: var(--radius-md);
  color: var(--color-danger);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
  animation: view-enter 200ms ease;
}

/* ─── OTP Input ─── */

.otp-container {
  margin-bottom: var(--space-6);
}

.otp-label {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-4);
}

.otp-inputs {
  display: flex;
  gap: var(--space-2);
  justify-content: center;
}

.otp-input {
  width: 44px;
  height: 52px;
  text-align: center;
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  font-family: var(--font-mono);
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.otp-input:focus {
  border-color: var(--color-border-focus);
  box-shadow: var(--shadow-ring-focus);
}

.otp-input.filled {
  border-color: var(--color-border-heavy);
  background: var(--color-bg-surface-hover);
}

.otp-resend {
  text-align: center;
  margin-top: var(--space-4);
}

.otp-resend-btn {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  cursor: pointer;
  text-decoration: underline;
  transition: color var(--transition-fast);
}

.otp-resend-btn:hover {
  color: var(--color-text-primary);
}

.otp-resend-btn:disabled {
  color: var(--color-text-tertiary);
  cursor: not-allowed;
  text-decoration: none;
}

/* ─── Auth Step Transition ─── */

.auth-step {
  animation: auth-step-in 240ms ease;
}

@keyframes auth-step-in {
  from {
    opacity: 0;
    transform: translateX(8px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.auth-back {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  margin-bottom: var(--space-4);
  padding: 0;
  transition: color var(--transition-fast);
}

.auth-back:hover {
  color: var(--color-text-primary);
}

.auth-back svg {
  width: 14px;
  height: 14px;
}