:root {
    --bg: #121212;
    --panel-bg: rgba(20, 20, 20, 0.95);
    --wrapper-bg: #000000;
    --text: #ffffff;
    --text-muted: #aaaaaa;
    --accent: #ff0050;
    --accent-hover: #e00045;
    --border: #333333;
}

body.light-theme {
    --bg: #f0f2f5;
    --panel-bg: rgba(255, 255, 255, 0.98);
    --wrapper-bg: #ffffff;
    --text: #1a1a1a;
    --text-muted: #666666;
    --border: #dddddd;
}

body {
    margin: 0; 
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg); 
    color: var(--text); 
    display: flex; 
    flex-direction: column;
    height: 100vh; 
    overflow: hidden;
    touch-action: none;
    user-select: none;
    transition: background-color 0.3s, color 0.3s;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background: var(--panel-bg);
    border-bottom: 1px solid var(--border);
    z-index: 50;
}

.search-container {
    display: flex;
    flex: 1;
    max-width: 400px;
    margin: 0 15px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
}

.search-container input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text);
    padding: 8px 15px;
    outline: none;
}

.icon-btn {
    background: transparent;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text);
    padding: 5px;
    transition: transform 0.2s;
}

.icon-btn:hover { transform: scale(1.1); }

.feed-container {
    flex: 1; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    position: relative;
}

.video-wrapper {
    width: 100%; 
    max-width: 400px; 
    height: 100%; 
    max-height: 800px; 
    background: var(--wrapper-bg);
    position: relative; 
    overflow: hidden; 
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    will-change: transform;
}

.swipe-anim-up { animation: slideUp 0.4s cubic-bezier(0.25, 0.8, 0.25, 1) forwards; }
.swipe-anim-down { animation: slideDown 0.4s cubic-bezier(0.25, 0.8, 0.25, 1) forwards; }

@keyframes slideUp {
    0% { transform: translateY(0); opacity: 1; }
    40% { transform: translateY(-100%); opacity: 0; }
    41% { transform: translateY(100%); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

@keyframes slideDown {
    0% { transform: translateY(0); opacity: 1; }
    40% { transform: translateY(100%); opacity: 0; }
    41% { transform: translateY(-100%); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

iframe { 
    width: 150%; height: 150%; 
    border: none; pointer-events: none; 
    position: absolute; top: 50%; left: 50%; 
    transform: translate(-50%, -50%);
}

.swipe-hint {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.7); color: white; padding: 15px 25px; 
    border-radius: 30px; font-weight: bold; pointer-events: none; z-index: 5;
    transition: opacity 0.5s;
}

.overlay-controls {
    position: absolute; bottom: 0; left: 0; width: 100%; 
    padding: 30px 20px 20px; box-sizing: border-box;
    background: linear-gradient(transparent, rgba(0,0,0,0.85)); 
    display: flex; justify-content: space-between; align-items: flex-end;
    pointer-events: none;
}

.info-area { flex: 1; color: white; }
.author { font-weight: bold; font-size: 1.1rem; margin-bottom: 5px; display: flex; align-items: center; gap: 8px; }
.author::before { content: ''; display: inline-block; width: 32px; height: 32px; background: var(--accent); border-radius: 50%; }
#video-info { font-size: 1rem; margin-bottom: 5px; line-height: 1.3; }
#video-cat { font-size: 0.85rem; color: #ccc; font-weight: bold; text-transform: uppercase; }

.interaction-sidebar {
    display: flex; 
    flex-direction: column; 
    gap: 15px;
    pointer-events: auto;
    align-items: center;
}

.action-btn {
    width: 45px; height: 45px;
    border-radius: 50%; border: none;
    background: rgba(255, 255, 255, 0.2);
    color: white; font-size: 1.2rem;
    cursor: pointer; backdrop-filter: blur(5px);
    transition: background 0.2s, transform 0.1s;
}
.action-btn:active { transform: scale(0.9); }
.action-btn.active-like { background: #00ffcc; color: black; }
.action-btn.active-dislike { background: var(--accent); }

.side-panel {
    position: absolute; top: 0; left: 0;
    width: 320px; height: 100vh;
    background-color: var(--panel-bg); 
    border-right: 1px solid var(--border); 
    display: flex; flex-direction: column;
    z-index: 100; transform: translateX(-100%);
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-sizing: border-box; backdrop-filter: blur(10px);
}

.side-panel.show { transform: translateX(0); }

.panel-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 20px; border-bottom: 1px solid var(--border);
}
.panel-header h2 { margin: 0; font-size: 1.2rem; }
.close-btn { background: none; border: none; color: var(--text); font-size: 1.2rem; cursor: pointer; }

.panel-content { padding: 20px; overflow-y: auto; flex: 1; }

.control-group { margin-bottom: 25px; }
.control-group label { display: block; margin-bottom: 10px; font-size: 0.9rem; color: var(--text-muted); font-weight: bold;}
.help-text { font-size: 0.8rem; color: var(--text-muted); margin-top: 5px; }

.ui-btn {
    width: 100%; padding: 12px; border-radius: 8px;
    border: 1px solid var(--border); background: var(--bg);
    color: var(--text); font-weight: bold; cursor: pointer;
    transition: background 0.2s;
}
.ui-btn:hover { background: var(--border); }
.danger-btn { border-color: var(--accent); color: var(--accent); }
.danger-btn:hover { background: var(--accent); color: white; }

.stat-box { background: var(--wrapper-bg); padding: 15px; border-radius: 8px; font-family: monospace; font-size: 0.9rem; margin-bottom: 20px; border: 1px solid var(--border);}
.stat-row { display: flex; justify-content: space-between; margin-bottom: 8px; }
.highlight { color: var(--accent); font-weight: bold; }
input[type="range"] { width: 100%; cursor: pointer; accent-color: var(--accent); }

@media (max-width: 768px) { 
    .video-wrapper { border-radius: 0; height: 100%; max-width: 100%;} 
    .side-panel { width: 100vw; }
}