body {
    font-family: 'Poppins', sans-serif;
    background-color: #f4f6f9;
    color: #333;
}

.container {
    max-width: 900px;
    margin-top: 50px;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.1);
}

h2 {
    color: #343a40;
    text-align: center;
    margin-bottom: 20px;
}

.navbar {
    margin-bottom: 20px;
    background-color: #ffffff !important;
    border-bottom: 2px solid #ddd;
}

.navbar-brand {
    font-weight: bold;
    color: black !important;
}

.nav-link {
    color: black !important;
    font-weight: bold;
    transition: 0.3s;
}

.nav-link:hover {
    color: #007bff !important;
}

.popup-container {
    width: 100%;
    max-width: 600px;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.2);
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1000;
}

.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

.popup-header {
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 15px;
}

.popup-close {
    position: absolute;
    top: 10px;
    right: 10px;
    cursor: pointer;
    font-size: 18px;
    color: #777;
}

.popup-close:hover {
    color: black;
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
    transition: 0.3s;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #004085;
}

.btn-success {
    background-color: #28a745;
    border-color: #28a745;
}

.btn-success:hover {
    background-color: #1e7e34;
    border-color: #1c7430;
}

input[type="text"], input[type="date"], input[type="email"], select {
    border-radius: 5px;
    border: 1px solid #ced4da;
    padding: 8px;
    width: 100%;
}

form .row {
    margin-bottom: 15px;
}