/* Основен стил, запазен модерен стил */

body {
  margin: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f4f7fa;
  display: flex;
  height: 100vh;
}

.sidebar {
  width: 250px;
  background-color: #003366;
  color: white;
  display: flex;
  flex-direction: column;
  padding: 1rem;
}

.sidebar h2 {
  margin: 0 0 2rem 0;
  font-weight: 700;
  font-size: 1.8rem;
  text-align: center;
}

.sidebar nav ul {
  list-style: none;
  padding: 0;
}

.sidebar nav ul li {
  margin-bottom: 1rem;
}

.sidebar nav ul li a {
  color: white;
  text-decoration: none;
  font-size: 1.1rem;
  cursor: pointer;
  display: block;
  padding: 0.5rem 1rem;
  border-radius: 5px;
}

.sidebar nav ul li a:hover,
.sidebar nav ul li a.active {
  background-color: #0055a5;
}

.main-content {
  flex-grow: 1;
  padding: 2rem;
  overflow-y: auto;
  background-color: white;
  display: flex;
  flex-direction: column;
}

.screen {
  max-width: 900px;
  margin: 0 auto;
}

.screen.hidden {
  display: none;
}

h1 {
  margin-bottom: 1rem;
  color: #003366;
}

input[type="text"],
input[type="password"],
select {
  width: 100%;
  padding: 0.5rem;
  margin-bottom: 1rem;
  font-size: 1rem;
  border-radius: 5px;
  border: 1px solid #ccc;
}

button {
  background-color: #0055a5;
  border: none;
  color: white;
  padding: 0.7rem 1.5rem;
  font-size: 1rem;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #003366;
}

.btn-logout {
  background-color: #cc3333;
  float: right;
}

.error {
  color: red;
  margin-top: -0.5rem;
  margin-bottom: 1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

table th, table td {
  border: 1px solid #ddd;
  padding: 0.6rem;
  text-align: left;
}

table th {
  background-color: #003366;
  color: white;
}

.product-row {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.product-row input[type="text"],
.product-row input[type="number"],
.product-row select {
  flex: 1;
}

.product-row button.remove-btn {
  background-color: #cc3333;
  padding: 0 0.5rem;
}

.product-row button.remove-btn:hover {
  background-color: #990000;
}