/* 飞行棋游戏背景样式 */

/* 主背景 - 适用于整个页面 */
body {
    background-color: var(--bg-color);
    background-image:
        radial-gradient(circle at 10% 20%, rgba(var(--player-red-rgb, 255, 77, 109, 0.05)), transparent 400px),
        radial-gradient(circle at 90% 30%, rgba(var(--player-blue-rgb, 76, 201, 240, 0.05)), transparent 400px),
        radial-gradient(circle at 80% 90%, rgba(var(--player-yellow-rgb, 255, 209, 102, 0.05)), transparent 400px),
        radial-gradient(circle at 20% 80%, rgba(var(--player-green-rgb, 6, 214, 160, 0.05)), transparent 400px),
        url('../img/backgrounds/pattern.svg');
    background-attachment: fixed;
    background-size: cover, cover, cover, cover, 200px 200px;
    background-position: center;
    transition: background-color 0.3s ease;
}

/* 暗黑模式下的背景调整 */
[data-theme="dark"] body {
    background-image:
        radial-gradient(circle at 10% 20%, rgba(var(--player-red-rgb, 255, 77, 109, 0.1)), transparent 400px),
        radial-gradient(circle at 90% 30%, rgba(var(--player-blue-rgb, 76, 201, 240, 0.1)), transparent 400px),
        radial-gradient(circle at 80% 90%, rgba(var(--player-yellow-rgb, 255, 209, 102, 0.1)), transparent 400px),
        radial-gradient(circle at 20% 80%, rgba(var(--player-green-rgb, 6, 214, 160, 0.1)), transparent 400px),
        url('../img/backgrounds/pattern-dark.svg');
}

/* 游戏大厅和等待室背景 */
#lobby, #waitingRoom {
    background-image:
        linear-gradient(135deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.9)),
        url('../img/backgrounds/board-pattern.svg');
    background-size: cover, 300px 300px;
    background-position: center;
    transition: background-image 0.3s ease;
}

/* 暗黑模式下的游戏大厅和等待室背景 */
[data-theme="dark"] #lobby,
[data-theme="dark"] #waitingRoom {
    background-image:
        linear-gradient(135deg, rgba(30, 30, 30, 0.8), rgba(30, 30, 30, 0.95)),
        url('../img/backgrounds/board-pattern-dark.svg');
}

/* 游戏主界面背景 - 使用伪元素确保背景不会干扰棋盘 */
.main {
    position: relative;
    z-index: 1;
}

.main::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../img/backgrounds/game-bg.svg');
    background-size: cover;
    background-position: center;
    opacity: 0.15; /* 大幅降低不透明度 */
    z-index: -1; /* 确保背景在棋盘下面 */
    transition: background-image 0.3s ease, opacity 0.3s ease;
    pointer-events: none; /* 确保背景不会干扰点击事件 */
}

/* 暗黑模式下的游戏主界面背景 */
[data-theme="dark"] .main::before {
    background-image: url('../img/backgrounds/game-bg-dark.svg');
    opacity: 0.2; /* 暗黑模式下稍微提高不透明度 */
}

/* 顶部控制栏背景 */
.top-controls {
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.8);
}

/* 暗黑模式下的顶部控制栏背景 */
[data-theme="dark"] .top-controls {
    background-color: rgba(30, 30, 30, 0.8);
}