/* 字体 */
@font-face {
    font-family: 'Excalifont';
    src: url('../assets/font/Excalifont-Regular.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'PressStart2P';
    src: url('../assets/font/PressStart2P-Regular.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Pixel32';
    src: url('../assets/font/Pixel32_CN.woff2') format('woff2');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    min-height: 100vh;
    overflow-x: hidden;
    background: #111 url('../assets/wallpaper.png') center/cover no-repeat;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    font-family: 'Excalifont', sans-serif;
    cursor: url('../assets/pixel-cursor.png') 8 8, crosshair;
}

/* 主内容区 */
#main-content {
    flex: 1;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: flex-start;
    gap: 24px;
    padding: 24px;
}

/* 左右面板通用样式 */
.side-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.side-panel h2 {
    font-size: 18px;
    color: #fff;
    margin-bottom: 12px;
    text-align: center;
}

/* 左侧操作指南 */
#operation-guide {
    width: 300px;
    min-height: 400px;
    background: rgba(30, 30, 30, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    color: #ccc;
}

/* 选项面板标题 */
.side-panel .options-title {
    margin-top: 24px;
    margin-bottom: 8px;
}

/* 选项面板 */
#options-panel {
    width: 300px;
    background: rgba(30, 30, 30, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 20px;
    color: #ccc;
}

/* 音量控制 */
.volume-row {
    display: flex;
    align-items: center;
    gap: 12px;
}
.volume-icon {
    font-family: 'PressStart2P', monospace;
    font-size: 16px;
    color: #4caf50;
    line-height: 1;
    user-select: none;
    cursor: pointer;
    display: inline-block;
    width: 20px;
    text-align: center;
    transition: color 0.1s ease;
}
.volume-icon:hover {
    color: #66bb6a;
}
.volume-icon.paused {
    color: #888;
}
.volume-icon.paused:hover {
    color: #aaa;
}
.volume-percent {
    font-family: 'PressStart2P', monospace;
    font-size: 10px;
    color: #aaa;
    min-width: 32px;
    text-align: right;
    user-select: none;
}

/* 像素风滑块 */
.pixel-slider {
    -webkit-appearance: none;
    appearance: none;
    flex: 1;
    height: 6px;
    background: #333;
    border: 2px solid #555;
    border-radius: 0;
    outline: none;
    cursor: pointer;
}
.pixel-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: #4caf50;
    border: 2px solid #66bb6a;
    border-radius: 0;
    cursor: pointer;
}
.pixel-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: #4caf50;
    border: 2px solid #66bb6a;
    border-radius: 0;
    cursor: pointer;
}
.pixel-slider::-webkit-slider-thumb:hover {
    background: #66bb6a;
}
.pixel-slider::-moz-range-thumb:hover {
    background: #66bb6a;
}
.pixel-slider:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* 右侧游戏区 */
#game-container {
    width: 672px;
    height: 576px;
    position: relative;
}

#game-container canvas {
    image-rendering: pixelated;
    image-rendering: crisp-edges;
}

/* 底部长条 */
#bottom-header {
    width: 100%;
    min-height: 72px;
    padding: 12px 24px;
    background: rgba(0, 0, 0, 0.85);
    border-radius: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    color: #888;
    font-family: 'PressStart2P', monospace;
    font-size: 10px;
    line-height: 1.8;
    text-align: center;
}

#bottom-header a {
    color: #ccc;
    text-decoration: none;
}

#bottom-header a:hover,
#bottom-header a:focus {
    color: #fff;
    text-decoration: underline;
    outline: none;
}

/* 操作指南 */
.guide-section {
    margin-bottom: 24px;
}
.guide-section h3 {
    font-size: 15px;
    color: #fff;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

/* 键位布局 */
.key-row {
    display: flex;
    gap: 6px;
    margin-bottom: 6px;
}
.key-row.center {
    justify-content: center;
}

/* 3D 机械键盘按键 */
.key-cap {
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'PressStart2P', monospace;
    font-size: 14px;
    color: #eee;
    background: linear-gradient(180deg, #4a4a4a 0%, #3a3a3a 100%);
    border: 2px solid #555;
    border-bottom: 4px solid #222;
    border-right: 3px solid #2a2a2a;
    border-radius: 6px;
    box-shadow:
        0 1px 0 #666 inset,
        0 -1px 0 #333 inset,
        0 4px 6px rgba(0, 0, 0, 0.4),
        0 1px 2px rgba(0, 0, 0, 0.3);
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.5);
    user-select: none;
    transition: all 0.08s ease;
}
.key-cap.active {
    background: linear-gradient(180deg, #383838 0%, #444 100%);
    border-bottom-width: 2px;
    box-shadow:
        0 1px 0 #555 inset,
        0 -1px 0 #333 inset,
        0 1px 2px rgba(0, 0, 0, 0.3);
    transform: translateY(2px);
    color: #4fc3f7;
    text-shadow: 0 0 8px rgba(79, 195, 247, 0.6);
}
.key-label {
    display: flex;
    align-items: center;
    margin-left: 10px;
    font-size: 15px;
    color: #aaa;
}
.key-wide {
    width: auto;
    padding: 0 12px;
    font-size: 12px;
}