* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

header nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header .logo a {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

header nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

header nav ul li a {
    color: white;
    text-decoration: none;
    transition: color 0.3s;
}

header nav ul li a:hover {
    color: #3498db;
}

header nav ul li .logout-form {
    display: flex;
    align-items: center;
}

header nav ul li .logout-button {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    font: inherit;
    padding: 0;
    line-height: 1;
}

header nav ul li .logout-button:hover {
    color: #3498db;
    background: none;
}

main {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
}

.container {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

footer {
    background-color: #34495e;
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: auto;
}

h2 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
}

button, .btn {
    background-color: #3498db;
    color: white;
    padding: 0.5rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

button:hover, .btn:hover {
    background-color: #2980b9;
}