/* ==========================================
   视频投屏区
   ========================================== */
.video-wrapper {
    width: 100%;
    max-height: 50%;
    background: #000;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

.video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-md);
}

/* 视频区空状态 */
.video-placeholder {
    color: var(--text-muted);
    font-size: var(--font-size-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

/* 画中画提示 */
.video-pip-hint {
    position: absolute;
    bottom: var(--space-sm);
    right: var(--space-sm);
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    opacity: 0;
    transition: opacity var(--transition-fast);
}
.video-wrapper:hover .video-pip-hint {
    opacity: 1;
}

/* 屏幕画质标签 */
.screen-quality-badge {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    background: rgba(0,0,0,0.65);
    color: #fff;
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 600;
    pointer-events: none;
    z-index: 2;
    white-space: nowrap;
}

/* 投屏手势控制 (移动端/平板) */
#screen-brightness-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 2;
    transition: background-color 0.15s ease;
}

#screen-gesture-indicator {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.7);
    color: #fff;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 600;
    pointer-events: none;
    z-index: 3;
    opacity: 0;
    transition: opacity 0.2s ease;
    white-space: nowrap;
}