body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    color: #333;
}

header {
    background: #222;
    color: white;
    text-align: center;
    padding: 25px;
}

nav {
    background: #444;
    text-align: center;
    padding: 12px;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
}

nav a:hover {
    color: #ffcc00;
}

.container {
    width: 85%;
    margin: 30px auto;
    display: flex;
    gap: 25px;
}

.single {
    display: block;
}

.content, .login-box {
    background: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 0 8px rgba(0,0,0,0.1);
}

.content {
    flex: 2;
}

.login-box {
    flex: 1;
}

label {
    display: block;
    margin-top: 12px;
}

input {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    box-sizing: border-box;
}

button {
    width: 100%;
    margin-top: 15px;
    padding: 10px;
    background: #222;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background: #555;
}

.error {
    color: red;
    font-weight: bold;
}

.hint {
    font-size: 14px;
    color: #666;
}

table {
    border-collapse: collapse;
    width: 100%;
    margin-top: 15px;
}

th, td {
    border: 1px solid #ccc;
    padding: 10px;
    text-align: left;
}

th {
    background: #eee;
}

footer {
    text-align: center;
    background: #222;
    color: white;
    padding: 12px;
    margin-top: 30px;
}