* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(to bottom right, #ffcccc, #ff9999);
}

.container {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 60px;
    text-align: center;
    width: 500px;
}

h1 {
    margin-bottom: 20px;
    color: #d60000;
}

.button {
    background-color: #d60000;
    color: white;
    border: none;
    border-radius: 5px;
    padding: 10px 20px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin: 10px 0;
    font-size: 16px;
}

.button:hover {
    background-color: #b30000;
}

form {
    display: flex;
    flex-direction: column;
}

label {
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="text"],
input[type="password"] {
    padding: 10px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

input[type="text"]:focus,
input[type="password"]:focus {
    border-color: #d60000;
    outline: none;
}

.popup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    border: 2px solid #d60000;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    animation: fadeIn 0.5s;
    text-align: center;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

.close-btn {
    background-color: #d60000;
    color: white;
    border: none;
    border-radius: 5px;
    padding: 5px 10px;
    cursor: pointer;
}

.back-button {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 24px;
    color: #d60000;
    transition: transform 0.3s;
}

.back-button:hover {
    transform: translateX(-5px);
}