body {
    background: #fafafa;
    font-family: 'Segoe UI', Arial, sans-serif;
    color: #222;
    margin: 0;
}

.container {
    max-width: 800px;
    margin: 40px auto;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 4px 16px #0001;
    padding: 32px 32px 48px 32px;
}

h1, h2, h3 {
    color: #176ae6;
}

.nav {
    margin-bottom: 32px;
}

.nav a {
    color: #176ae6;
    text-decoration: none;
    margin-right: 16px;
    font-weight: bold;
}

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

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

table th, table td {
    border: 1px solid #eee;
    padding: 8px 12px;
    text-align: left;
}

table th {
    background: #f2f7fb;
}

button {
    padding: 6px 18px;
    border: none;
    border-radius: 5px;
    background: #176ae6;
    color: #fff;
    font-size: 1em;
    cursor: pointer;
    margin-top: 4px;
    margin-bottom: 4px;
}

button:hover {
    background: #144da3;
}

input[type="text"], input[type="password"], input[type="date"], input[type="number"] {
    padding: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
    width: 90%;
    margin: 3px 0;
}

input[type="checkbox"] {
    transform: scale(1.2);
}

.error {
    color: #b51212;
    background: #ffeaea;
    border: 1px solid #f3b1b1;
    padding: 8px 12px;
    border-radius: 4px;
    margin-bottom: 14px;
}

.success {
    color: #206115;
    background: #e9ffe6;
    border: 1px solid #a3e2b1;
    padding: 8px 12px;
    border-radius: 4px;
    margin-bottom: 14px;
}

.login-box {
    max-width: 350px;
    margin: 80px auto;
    padding: 24px 32px 32px 32px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 18px #0002;
}

.login-box h2 {
    margin-bottom: 24px;
}

.login-box label {
    display: block;
    margin: 10px 0 4px 0;
}

.login-box input[type="text"], 
.login-box input[type="password"] {
    width: 100%;
    margin-bottom: 14px;
}