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

html, body {
    height: 100%;
    width: 100%;
    font-family: Arial, Helvetica, sans-serif;
    background-color: var(--background-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

body {
        font-family: 'Arial', sans-serif;
        background: url('2123.jpg') no-repeat center center fixed;
        background-size: cover;
        color: #fff;
        line-height: 1.5;
        margin: 0;
    }

#setUsernameForm {
    background-color: var(--popup-bg);
    border-radius: 10px;
    padding: 40px 30px;
    max-width: 400px;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 10px 20px var(--box-shadow-color);
    border: 2px solid var(--btn-take-bonus-bg);
}

.logo img {
    max-width: 250px;
    margin-bottom: 20px;
}

.input-container {
    width: 100%;
    margin-bottom: 20px;
}

input {
    width: 100%;
    background-color: var(--background-color);
    border: 1px solid var(--table-border-color);
    border-radius: 5px;
    padding: 12px 20px;
    margin-top: 10px;
    color: var(--filter-button-color);
    font-size: 16px;
}

button {
    background-color: var(--btn-take-bonus-bg);
    border-radius: 5px;
    padding: 12px;
    border: none;
    color: var(--filter-button-color);
    font-size: 16px;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: var(--filter-button-hover);
}

.error-message {
    color: var(--popup-close-btn-bg);
    margin-bottom: 15px;
    font-weight: bold;
    font-size: 14px;
}

footer {
    background-color: var(--header-background);
    text-align: center;
    border-top: 2px solid var(--header-border);
    font-size: 24px;
    font-weight: bold;
    letter-spacing: 1px;
    position: fixed;
    bottom: 0;
    width: 100%;
    z-index: 1000;
}

.made-by img {
    margin-left: 5px;
    height: 20px;
    vertical-align: middle;
}
   /* Loader ve overlay için CSS */
        #overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--overlay-bg); /* Buton rengi ile aynı */
            display: none; /* Başlangıçta gizli */
            z-index: 999;
        }

        #loader {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            z-index: 1000;
            display: none; /* Başlangıçta gizli */
        }

        /* Loader stilini buraya ekleyin */
        .loader {
            border: 10px solid #f3f3f3; /* Light grey */
            border-top: 10px solid var(--btn-take-bonus-bg); /* Buton rengi ile aynı */
            border-radius: 50%;
            width: 60px;
            height: 60px;
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }