body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #e9edf1;
    margin: 0;
    padding: 30px;
}
/* Main Wrapper */
#pageWrapper {
    max-width: 1400px;
    margin: auto;
    background-color: #f7f9fb;
    border: 6px solid #4f6f8d;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 0 20px rgba(0,0,0,0.12);
    zoom: 0.8;
}
/* Navigation */
#topNav {
    background-color: #4f6f8d;
    border-radius: 10px;
    padding: 15px 0;
}
#topNav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 50px;
    margin: 0;
    padding: 0;
}
#topNav a {
    text-decoration: none;
    color: white;
    font-size: 22px;
    font-weight: bold;
}
#topNav a:hover {
    color: #111111;
}
/* Header */
#pageHeader {
    text-align: center;
    padding-top: 40px;
}
#pageHeader h1 {
    margin: 0;
    font-size: 54px;
    color: #2f4f68;
}
#pageHeader p {
    font-size: 22px;
    color: #666;
}
/* Challenge Page */
.challenge-page {
    display: flex;
    justify-content: center;
    margin-top: 50px;
}
.challenge-card {
    width: 850px;
    background-color: white;
    border: 4px solid #4f6f8d;
    border-radius: 14px;
    padding: 30px;
    box-shadow: 0 0 15px rgba(0,0,0,0.12);
}
.challenge-card h2 {
    text-align: center;
    color: #24445c;
    font-size: 34px;
    margin-top: 0;
}
/* Form */
#challengeForm {
    display: flex;
    flex-direction: column;
    gap: 18px;
}
#challengeForm label,
#challengeForm legend {
    font-weight: bold;
    color: #24445c;
    font-size: 20px;
}
#challengeForm input[type="text"],
#challengeForm select,
#challengeForm textarea {
    padding: 12px;
    font-size: 18px;
    border: 2px solid #4f6f8d;
    border-radius: 8px;
}
#challengeForm textarea {
    min-height: 120px;
    resize: vertical;
}
#challengeForm fieldset {
    border: 2px solid #4f6f8d;
    border-radius: 10px;
    padding: 18px;
    background-color: #f1f5f8;
}
#challengeForm fieldset label {
    display: block;
    margin-top: 10px;
    font-weight: normal;
    color: #111111;
}
#challengeForm button {
    margin-top: 15px;
    padding: 16px 40px;
    font-size: 24px;
    font-weight: bold;
    border: none;
    border-radius: 14px;
    background-color: #6587a8;
    color: white;
    cursor: pointer;
}
#challengeForm button:hover {
    background-color: #4f6f8d;
    color: #111111;
}
/* Validation Message */
#formMessage {
    padding: 14px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: bold;
    display: none;
}
.errorMessage {
    display: block !important;
    background-color: #ffd6d6;
    color: #8a0000;
    border: 2px solid #8a0000;
}