* {
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background: #f5f7fb;
    margin: 0;
    padding: 0;
}

.navbar {
    background: #2f4cff;
    color: #fff;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar .logo {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    font-size: 20px;
}

.navbar .nav-links a {
    color: #fff;
    margin-left: 15px;
    text-decoration: none;
    font-size: 14px;
}

.navbar .nav-links a:hover {
    text-decoration: underline;
}

.container {
    max-width: 950px;
    margin: 30px auto;
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 0 12px rgba(0,0,0,0.06);
}

h1, h2, h3 {
    color: #333;
    margin-top: 0;
}

form label {
    display: block;
    margin-top: 12px;
    font-weight: bold;
    font-size: 14px;
}

form input, form select, form textarea {
    width: 100%;
    padding: 8px;
    margin-top: 5px;
    border-radius: 4px;
    border: 1px solid #ccc;
}

button {
    margin-top: 15px;
    padding: 10px 20px;
    border: none;
    background: #2f4cff;
    color: #fff;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    opacity: 0.9;
}

.error {
    color: #b00020;
    background: #ffe5e9;
    padding: 10px;
    border-radius: 4px;
}

.success {
    color: #006400;
    background: #e7ffe7;
    padding: 10px;
    border-radius: 4px;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
    font-size: 14px;
}

.table th, .table td {
    border: 1px solid #ddd;
    padding: 8px;
}

.table th {
    background: #f0f0f0;
}

.footer {
    text-align: center;
    padding: 15px;
    font-size: 13px;
    color: #777;
}