:root {
  --font-main: Roboto, "Segoe UI", sans-serif;
  --color-bg: #e6f7ff;
  --header-bg: #8bc2e6;
  --header-border: #b0bec5;
  --form-bg: #f0f0f0;
  --color-btn: #005cbf;
  --color-btn-hover: #004a99;
  --color-border: #999;
  --color-text: #1a1a1a;
  --color-link: #005cbf;
  --focus-outline: 2px solid #005cbf;
}

body {
  background-color: var(--color-bg);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text);
  font-family: var(--font-main);
}

form {
  width: 50%;
  max-width: 80vw;
  margin: 10px auto;
  padding: 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--form-bg);
  font-family: var(--font-main);
}

h1,
h2,
p {
  text-align: center;
  font-family: var(--font-main);
}

a {
  text-decoration: underline;
  color: var(--color-link);
}

a:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

.demo {
  display: flex;
  width: 90vw;
  max-width: 100%;
  gap: 1.5rem;
  margin: 2rem auto;
  justify-content: flex-start;
  align-items: flex-start;
}

#userInfo {
  color: var(--color-text);
  font-size: 1rem;
  font-family: var(--font-main);
}

#customerForm,
#productForm,
#saleForm {
  display: none;
}

.submit,
.clear {
  height: 40px;
}

.submit {
  background-color: #4CAF50; /* Green */
  color: white;
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: background-color 0.3s ease;
}

.submit:hover {
  background-color: #45a049;
}

.clear {
  background-color: #f44336; /* Red */
  color: white;
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  margin-left: 8px;
  transition: background-color 0.3s ease;
}

.clear:hover {
  background-color: #d32f2f;
}

.form-buttons {
  display: flex;
  gap: 1rem;
  width: 100%;
  max-width: 100vw; 
  margin-top: 1rem;
  justify-content: center;
  align-items: center;
}

#paymentMethod {
  margin-bottom: auto;
}

.postForm {
  display: flex;
  flex-direction: column;
  height: auto;
  box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
  /* max-width: 100vw;
  width: 90%; */
}

.postForm input,
.postForm textarea,
.postForm select {
  margin-bottom: 1rem;
  padding: 0.5rem;
  font-size: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

label {
  margin-bottom: 0.5rem;
  font-weight: bold;
  display: block;
  font-size: 1.1rem;
  color: var(--color-text);
}

#authContainer {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
}

.auth-button {
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 4px;
  background-color: var(--color-btn);
  color: #ffffff;
  cursor: pointer;
  font-size: 1rem;
  transition: background-color 0.2s;
}

.auth-button:hover {
  background-color: var(--color-btn-hover);
}

.pos-title {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.pos-title h1 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  font-size: 1.5rem;
}

.pos-title img {
  vertical-align: middle;
}

.pos-title a {
  text-decoration: none;
  color: inherit;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background-color: var(--header-bg);
  border-bottom: 1px solid var(--header-border);
  border-radius: 10px;
}

header h1 {
  margin: 0;
  font-size: 1.5rem;
  color: var(--color-text);
}

@media (max-width: 600px) {
  .demo {
    flex-direction: column;
    width: 100vw;
  
  }

  form {
    width: 90%;
  }

  header {
    flex-direction: column;
  }

  h1 {
    font-size: 1rem;
  }
}