/* Center Wrapper */
.center-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 90vh;
    background: #f5f9ff;
}

/* Card Box */
.change-card {
    width: 420px;
    background: #ffffff;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
    animation: fadeIn 0.4s ease-in-out;
}

/* Heading */
.change-card h3 {
    margin-bottom: 18px;
    font-size: 22px;
    font-weight: bold;
    color: #174a8f;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Input Fields */
.change-card input {
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    border: 1px solid #c7c7c7;
    margin-bottom: 14px;
    transition: 0.2s;
}

.change-card input:focus {
    border-color: #006aff;
    box-shadow: 0 0 5px rgba(0, 106, 255, 0.4);
    outline: none;
}

/* Button */
.change-card button {
    width: 100%;
    padding: 14px;
    background: #007bff;
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    cursor: pointer;
    font-weight: bold;
    transition: 0.2s;
}

.change-card button:hover {
    background: #005fcc;
}

/* Last Updated Box */
.last-update-box {
    margin-top: 15px;
    padding: 12px;
    background: #e8f0ff;
    border-left: 5px solid #0066ff;
    border-radius: 10px;
    font-size: 14px;
    color: #003f88;
    display: none;
}

/* Show when data exists */
.last-update-box.show {
    display: block;
}

/* Fade Animation */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}