.cc-card-checker-container {
    max-width: 400px;
    margin: 30px auto;
    background: #f9f9f9;
    border-radius: 12px;
    box-shadow: 0 2px 8px #0001;
    padding: 24px;
}
.cc-form h2 {
    text-align: center;
    margin-bottom: 20px;
    color: #23395d;
}
.cc-form-row {
    margin-bottom: 18px;
}
.cc-form-row label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
}
.cc-form-row input {
    width: 100%;
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px solid #bbb;
}
.cc-btn {
    width: 100%;
    padding: 10px 0;
    background: #23395d;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: bold;
    margin-top: 10px;
    cursor: pointer;
    transition: background 0.2s;
}
.cc-btn:hover {
    background: #1a2940;
}
#cc-card-checker-result {
    margin-top: 22px;
}
.cc-result-card {
    background: #fff;
    border: 1px solid #23395d33;
    border-radius: 8px;
    padding: 18px;
    box-shadow: 0 1px 4px #0001;
}
.cc-valid {
    color: #2e7d32;
    font-weight: bold;
    font-size: 18px;
    margin-bottom: 8px;
}
.cc-invalid {
    color: #c62828;
    font-weight: bold;
    font-size: 18px;
    margin-bottom: 8px;
}
.cc-result-card ul {
    list-style: none;
    padding: 0;
}
.cc-result-card li {
    margin-bottom: 8px;
}
.cc-notfound {
    text-align: center;
    color: #555;
    font-size: 16px;
}