body {
    font-family: Arial, Helvetica, sans-serif;
    background: #f4f6f8;
    margin: 0;
    color: #222;
}

header {
    background: #0b4da2;
    color: white;
    padding: 22px;
    text-align: center;
}

footer {
    background: #eaeaea;
    text-align: center;
    padding: 12px;
    font-size: 13px;
}

main {
    padding: 30px;
}

.card {
    max-width: 900px;
    background: white;
    margin: auto;
    padding: 28px;
    border-radius: 6px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.title {
    text-align: center;
    color: #0b4da2;
}

.desc {
    text-align: justify;
    margin-bottom: 20px;
}

label {
    font-weight: bold;
}

input[type="file"] {
    margin-top: 8px;
}

button {
    width: 100%;
    margin-top: 18px;
    padding: 10px;
    background: #0b4da2;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background: #083b7a;
}

.note {
    font-size: 13px;
    color: #555;
}

.result-box {
    margin-bottom: 20px;
}

textarea {
    width: 100%;
    padding: 10px;
    font-size: 14px;
}

.btn-secondary {
    display: inline-block;
    padding: 8px 14px;
    background: #e0e0e0;
    text-decoration: none;
    color: #333;
}