body {
    margin: 0;
    overflow: hidden;
    background-color: #000;
    font-family: 'Courier New', monospace;
    user-select: none;
}
canvas { display: block; }

/* UI 层 */
#ui-layer {
    position: absolute; top: 20px; left: 20px;
    color: #33ccff; pointer-events: none; z-index: 20;
    display: none; /* 默认隐藏，在ROBOT场景中显示 */
}
.hud-row {
    margin-bottom: 8px; font-size: 16px;
    text-shadow: 0 0 5px rgba(51, 204, 255, 0.5);
}
.val-warn { color: #ff3333; text-shadow: 0 0 5px #ff3333; }

#freq-box {
    border: 2px solid #33ccff; padding: 5px 10px;
    display: inline-block; background: rgba(0,20,40,0.8);
    font-weight: bold; font-size: 20px; transition: color 0.2s;
}

/* 频率分析仪浮动UI */
.analyzer-tag {
    position: absolute;
    background: rgba(0, 0, 0, 0.85);
    border: 1px solid #33ccff;
    padding: 8px 10px;
    color: #fff;
    font-size: 12px;
    pointer-events: none;
    transform: translate(-50%, -100%);
    white-space: nowrap;
    display: none;
    box-shadow: 0 0 10px #33ccff;
    z-index: 100;
    min-width: 120px;
}

.analyzer-overload {
    padding: 4px 0;
    text-align: center;
    font-size: 11px;
    font-weight: bold;
    border-bottom: 1px solid #33ccff;
    margin-bottom: 4px;
}

.overload-value {
    font-size: 14px;
    color: #fff;
}

.overload-bar-container {
    width: 100%;
    height: 8px;
    background: #222;
    border-radius: 2px;
    margin-top: 4px;
    overflow: hidden;
    border: 1px solid #444;
}

.overload-bar-fill {
    height: 100%;
    background: #aaa;
    transition: width 0.2s, background-color 0.2s;
}

.analyzer-energy {
    padding: 4px 0;
    text-align: center;
    font-size: 11px;
    font-weight: bold;
    border-bottom: 1px solid #33ccff;
    margin-bottom: 4px;
}

.energy-value {
    font-size: 14px;
    color: #fff;
}

.energy-bar-container {
    width: 100%;
    height: 8px;
    background: #222;
    border-radius: 2px;
    margin-top: 4px;
    overflow: hidden;
    border: 1px solid #444;
}

.energy-bar-fill {
    height: 100%;
    background: #00ff00;
    transition: width 0.2s, background-color 0.2s;
}

.analyzer-resonance {
    padding: 8px;
    text-align: center;
    font-size: 12px;
    font-weight: bold;
}

/* 交互提示 (通用) */
.interact-hint {
    position: absolute; display: none;
    color: #fff; font-weight: bold; font-size: 14px;
    text-shadow: 0 0 5px #fff; border: 1px solid #fff;
    padding: 2px 6px; background: rgba(0,0,0,0.8);
    transform: translate(-50%, -150%);
    z-index: 101;
    pointer-events: none;
    transition: opacity 0.2s ease-in-out;
}

/* 处决特定样式 */
.execute-hint { 
    color: #ff0000; 
    border-color: #ff0000; 
    text-shadow: 0 0 5px #ff0000; 
}

/* 物品提示样式 (动态颜色由JS设置) */
.item-hint {
    font-size: 12px;
    padding: 3px 8px;
    white-space: nowrap;
}

/* 挣扎提示样式 */
.struggle-hint {
    color: #ffaa00;
    border-color: #ffaa00;
    text-shadow: 0 0 5px #ffaa00;
}

/* 抓取提示样式 */
.grab-hint {
    color: #00ffff;
    border-color: #00ffff;
    text-shadow: 0 0 5px #00ffff;
}

/* 边缘红光效果 能量低或被grab时显示，也用于闪烁效果 */
#edge-glow {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none; z-index: 6;
    opacity: 0;
    transition: opacity 0.2s;
    box-shadow: inset 0 0 20px 8px rgba(255, 0, 0, 0.8);
}

/* 操作指南优化 */
.controls {
    position: absolute; bottom: 20px; left: 20px;
    color: #aaa; font-size: 13px; z-index: 10;
    background: rgba(0, 10, 20, 0.8);
    padding: 10px;
    border-left: 3px solid #33ccff;
    line-height: 1.6;
}
.key-btn {
    color: #fff; font-weight: bold; background: #333; padding: 1px 4px; border-radius: 3px; font-size: 12px;
}
.highlight { color: #33ccff; font-weight: bold; }