body, html {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
    background: #f7f7f7;
}

.error-message {
    color: #D8000C;
    background: #FFBABA;
    padding: 8px;
    font-size: 0.85rem;
    border-radius: 4px;
    margin-bottom: 10px;
}

.action-button {
    width: 100%;
    padding: 10px;
    font-size: 1rem;
    background: #007ACC;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    margin-top: 10px;
    transition: background 0.3s;
}

.action-button:hover {
    background: #005FA3;
}

.secondary {
    background: #ddd;
    color: #333;
}

.secondary:hover {
    background: #ccc;
}

.app-header {
    background: #fff;
    border-bottom: 1px solid #eee;
    padding: 10px;
    position: sticky;
    top: 0;
    z-index: 999;
}

.app-header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.95rem;
    color: #333;
}

.header-button {
    padding: 8px 12px;
    font-size: 0.9rem;
    background: #007ACC;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.header-button:hover {
    background: #005FA3;
}

/* Modal styling */
.modal {
    position: fixed;
    z-index: 1000;
    left: 0; 
    top: 0;
    width: 100%;
    height: 100%;
    overflow:auto;
    background-color: rgba(0,0,0,0.4);
    display:flex;
    justify-content:center;
    align-items:center;
}

.modal-content {
    background:#fff;
    padding:20px;
    border-radius:8px;
    max-width:600px;
    width:90%;
    position:relative;
}

.modal-close {
    position:absolute;
    top:10px;
    right:10px;
    cursor:pointer;
    font-size:1.2rem;
}

.modal-close:hover {
    color:#007ACC;
}