body {
    font-family: sans-serif;
    margin: 0;
    background: #fafafa;
}

.navbar {
    display: flex;
    gap: 20px;
    padding: 15px;
    background: #fff;
    position: sticky;
    top: 0;
    border-bottom: 1px solid #eee;
}

.navbar a {
    text-decoration: none;
    color: #444;
    font-weight: bold;
}

.navbar a.active {
    color: #007bff;
}

.section {
    padding: 60px 20px;
}

/* Cards */
.cards {
    display: flex;
    gap: 20px;
}
.card {
    background: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    justify-content: center;
    align-items: center;
}
.modal.hidden {
    display: none;
}
.modal-content {
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    width: 300px;
}
.close {
    float: left;
    cursor: pointer;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #007bff;
    color: #fff;
    padding: 12px 20px;
    border-radius: 8px;
}
.toast.hidden {
    display: none;
}