body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f4f4f9;
    color: #333;
}

.hidden { display: none !important; }

.card {
    background: white;
    padding: 20px;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    margin-bottom: 20px;
    text-align: center;
}

.header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn-primary {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 16px 24px;
    font-size: 16px;
    font-weight: bold;
    border-radius: 12px;
    cursor: pointer;
    width: 100%;
    transition: transform 0.2s;
}

.btn-logout {
    background-color: #eee;
    border: none;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 14px;
}

.btn-danger {
    background-color: #ff4444;
    color: white;
    border: none;
    padding: 12px;
    border-radius: 10px;
    width: 100%;
    margin-top: 15px;
}

ul { list-style: none; padding: 0; text-align: left; }

.notif-item {
    border-bottom: 1px solid #f0f0f0;
    padding: 15px 0;
}

.notif-time {
    display: block;
    font-size: 11px;
    color: #aaa;
    margin-top: 5px;
}