body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #121212;
    margin: 0;
    padding: 0;
    color: #ffffff;
}

.container {
    max-width: 1000px;
    margin: 40px auto;
    padding: 20px;
    background: #1e1e1e;
    box-shadow: 0 2px 10px rgba(255,255,255,0.1);
    border-radius: 8px;
}

h1, h2 {
    color: #ffffff;
}

.login-container {
    max-width: 400px;
    margin: 100px auto;
    text-align: center;
}

input, select, button, textarea {
    padding: 10px;
    margin: 5px 0;
    border: 1px solid #555;
    border-radius: 4px;
    width: 100%;
    box-sizing: border-box;
    background-color: #333;
    color: #ffffff;
}

input::placeholder, textarea::placeholder {
    color: #ccc;
}

button {
    background-color: #007bff;
    color: white;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background-color: #0056b3;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #444;
}

th {
    background-color: #333;
    color: #ffffff;
}

.alert {
    padding: 10px;
    margin-bottom: 15px;
    border-radius: 4px;
    display: none;
}

.alert-success { 
    background-color: #1b5e20; 
    color: #81c784; 
    border: 1px solid #4caf50;
}
.alert-error { 
    background-color: #b71c1c; 
    color: #ef5350; 
    border: 1px solid #f44336;
}

.section {
    margin-bottom: 40px;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #444;
    padding-bottom: 20px;
    margin-bottom: 20px;
}

.logout-btn {
    width: auto;
    background: #dc3545;
    color: white;
}

.logout-btn:hover {
    background: #c82333;
}