:root {
    --bg-color: #0b0c10;
    --panel-color: #151720;
    --border-color: #232733;
    --accent-color: #ff334b;
    --text-main: #ffffff;
    --text-muted: #8c92a4;
    --hover-color: rgba(255, 51, 75, 0.1);
}

* { 
    box-sizing: border-box; 
}

body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar Layout */
.sidebar {
    width: 420px;
    background-color: var(--panel-color);
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    z-index: 10;
}

.sidebar-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    margin: 0 0 10px 0;
    font-size: 1.2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h2 span { 
    color: var(--accent-color); 
}

.tab-controls {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 5px;
    margin-bottom: 8px;
}

.tab-btn {
    padding: 6px;
    background: #0b0c10;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.75rem;
    font-weight: 600;
}

.tab-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.input-panel { 
    display: none; 
}

.input-panel.active { 
    display: block; 
}

input[type="text"], select {
    width: 100%;
    padding: 8px 10px;
    background: #0b0c10;
    border: 1px solid var(--border-color);
    color: #fff;
    border-radius: 6px;
    outline: none;
    font-size: 0.85rem;
    margin-bottom: 8px;
}

input[type="text"]:focus, select:focus { 
    border-color: var(--accent-color); 
}

textarea {
    width: 100%;
    height: 60px;
    background: #0b0c10;
    border: 1px solid var(--border-color);
    color: #fff;
    border-radius: 6px;
    padding: 8px;
    font-family: monospace;
    font-size: 0.75rem;
    resize: none;
    outline: none;
    margin-bottom: 8px;
}

textarea:focus { 
    border-color: var(--accent-color); 
}

button.action-btn {
    width: 100%;
    padding: 8px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
}

button.action-btn:hover { 
    opacity: 0.9; 
}

#m3uFile {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 8px;
}

.filters-bar {
    padding: 10px 20px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(0,0,0,0.2);
    display: flex;
    gap: 8px;
}

.filters-bar input {
    margin: 0;
}

.filters-bar select {
    width: 130px; 
    margin: 0;
}

/* Channel Scroll List */
.channel-list {
    flex: 1;
    overflow-y: auto;
    padding: 5px 0;
}

.channel-list::-webkit-scrollbar { 
    width: 5px; 
}

.channel-list::-webkit-scrollbar-thumb { 
    background: var(--border-color); 
    border-radius: 3px; 
}

.channel-item {
    padding: 10px 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.02);
    border-left: 3px solid transparent;
    transition: 0.2s;
}

.channel-item:hover { 
    background: var(--hover-color); 
}

.channel-item.active { 
    background: var(--hover-color); 
    border-left-color: var(--accent-color); 
}

.channel-name { 
    font-size: 0.85rem; 
    font-weight: 500; 
    word-break: break-all; 
}

.empty-state {
    padding: 25px; 
    text-align: center; 
    color: var(--text-muted);
}

/* Main Player Window */
.player-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: #000;
    padding: 30px;
}

.video-wrapper {
    width: 100%;
    max-width: 1100px;
    aspect-ratio: 16/9;
    background: #0b0c10;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0,0,0,0.7);
    border: 1px solid var(--border-color);
}

.plyr {
    height: 100%;
    width: 100%;
    --plyr-color-main: var(--accent-color);
    --plyr-video-background: #0b0c10;
}

.now-playing {
    margin-top: 20px;
    font-size: 1.05rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
}

.live-badge {
    background: var(--accent-color);
    color: white;
    font-size: 0.75rem;
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: bold;
    letter-spacing: 1px;
}

@media(max-width: 900px) {
    body { 
        flex-direction: column; 
    }
    .sidebar { 
        width: 100%; 
        height: 45vh; 
    }
    .player-container { 
        height: 55vh; 
        padding: 15px; 
    }
}