:root[data-theme="light"] {
    --bg-color: #ffffff;
    --text-color: #000000;
    --navbar-bg: #f8f9fa;
    --input-border: #ddd;
    --button-bg: #007bff;
    --button-text: white;
    --footer-bg: #f8f9fa;
    --bg-opacity: 0;
    --icon-text: #000000;
}

:root[data-theme="dark"] {
    --bg-color: #1a1a1a;
    --text-color: #ffffff;
    --navbar-bg: #2d2d2d;
    --input-border: #444;
    --button-bg: #0056b3;
    --button-text: white;
    --footer-bg: #2d2d2d;
    --bg-opacity: 0;
    --icon-text: #ffffff;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    transition: background-image 0.3s ease;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--navbar-bg);
    padding: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    z-index: 9999;
}

.theme-selector {
    position: absolute;
    right: 50px;
    top: 50%;
    transform: translateY(-50%);
}

#themeSelect {
    padding: 5px;
    border-radius: 4px;
    border: 1px solid var(--input-border);
    background-color: var(--bg-color);
    color: var(--text-color);
    cursor: pointer;
}

#themeSelect option {
    background-color: var(--bg-color);
    color: var(--text-color);
}


#addChannelForm {
    display: flex;
    justify-content: center;
    gap: 10px;
    max-width: 800px;
    margin: 0 auto;
}

input[type="text"] {
    flex: 1;
    max-width: 93%;
    padding: 8px;
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    border-radius: 4px;
}

button {
    padding: 8px 16px;
    cursor: pointer;
    max-width: 96%;
    background-color: var(--button-bg);
    color: var(--button-text);
    border: none;
    border-radius: 4px;
}

.container {
    margin-top: 80px;
    padding: 0px;
    position: relative;
    z-index: 1;
}

.container::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-color);
    opacity: var(--bg-opacity);
    z-index: -1;
}

#videoGrid {
    display: grid;
    grid-template-columns: repeat(3, minmax(300px, 1fr));
    gap: 0px;
    padding: 0px;
}

.video-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 ölçeklendirmesi */
    background: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.remove-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 9;
    background-color: rgba(255, 0, 0, 0.7);
    color: white;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.remove-btn:hover {
    background-color: rgba(255, 0, 0, 0.9);
}


.version {
    position: fixed;
    bottom: 10px;
    right: 5px;
    padding: 5px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 10px;
    z-index: 9999;
}

.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    font-family: Arial, Helvetica, sans-serif;
    background-color: var(--footer-bg);
    color: var(--text-color);
    padding: 5px;
    box-shadow: 0 -2px 4px rgba(0,0,0,0.1);
    font-size: 10px;
    z-index: 1000;
}
.footer p {
    margin: 0;
    padding: 10px;
}

.bg-controls {
    position: absolute;
    right: 200px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    gap: 10px;
}

.bg-controls button {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    color: var(--icon-text);
}

.bg-controls .material-icons {
    font-size: 20px;
}

/* Mobil cihazlar için sorgu */
@media screen and (max-width: 768px) {
    #videoGrid {
        grid-template-columns: 1fr;  /* Mobil cihazlar için tek sütun */
        gap: 0px;
        padding: 0px;
    }

    .navbar {
        padding: 10px;
    }

    #addChannelForm {
        flex-direction: column;
        gap: 10px;
    }

    #addChannelForm input,
    #addChannelForm button {
        width: 100%;
    }
    .bg-controls {
        display: none;
    }
}



/* Buton Stilleri */
.share-btn {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-left: 10px;
}
.share-btn:hover { background-color: #45a049; }

.leaderboard-btn {
    background: none;
    color: inherit;
    padding: 5px 10px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    margin: 0 15px;
}

/* Modal (Açılır Pencere) Stilleri */
.modal {
    display: none; 
    position: fixed; 
    z-index: 1000; 
    left: 0;
    top: 0;
    width: 100%; 
    height: 100%; 
    background-color: rgba(0,0,0,0.6); 
    backdrop-filter: blur(3px);
}

.modal-content {
    background-color: var(--bg-color, #fff); /* Tema değişkeninize uyarlayın */
    color: var(--text-color, #000);
    margin: 10% auto; 
    padding: 20px;
    border-radius: 8px;
    width: 80%;
    max-width: 500px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.close-modal {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.close-modal:hover { color: red; }

#leaderboardList {
    list-style-type: none;
    padding: 0;
}

#leaderboardList li {
    padding: 10px;
    border-bottom: 1px solid #ddd;
    display: flex;
    justify-content: space-between;
}

#leaderboardList li a {
    color: #007bff;
    text-decoration: none;
    font-weight: bold;
}

.logout-btn {
    background-color: #f44336;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-left: 10px;
}

.logout-btn:hover { 
    background-color: #da190b; 
}