/* --- 全局样式 --- */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #f0f2f5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    color: #333;
    padding: 20px; /* 添加内边距防止内容贴边 */
}

.container {
    text-align: center;
    background-color: #ffffff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    width: 100%; /* 确保容器宽度适应父元素 */
    max-width: 800px; /* 添加最大宽度限制 */
    margin: 0 auto; /* 居中 */
}

h1 {
    margin-top: 0;
    color: #1a2a4d;
    font-size: 1.8rem; /* 使用相对单位 */
}

/* --- 控制区域 --- */
.controls {
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap; /* 允许换行 */
    justify-content: center;
    align-items: center;
    gap: 10px;
    font-size: 1.1em;
}

#colorPicker {
    width: 50px;
    height: 50px;
    border: 1px solid #ccc;
    border-radius: 8px;
    cursor: pointer;
    padding: 2px;
    background-color: #fff;
}
#colorPicker::-webkit-color-swatch-wrapper {
    padding: 0;
}
#colorPicker::-webkit-color-swatch {
    border: none;
    border-radius: 6px;
}


/* --- 画布样式 --- */
#pixel-canvas-container {
    display: inline-block;
    border: 2px solid #ddd;
    padding: 5px;
    background-color: #f9f9f9;
    max-width: 100%; /* 确保容器不溢出 */
    overflow: auto; /* 添加滚动条 */
}

#pixel-canvas {
    display: grid;
    border: 1px solid #eee;
    margin: 0 auto; /* 居中 */
}

.pixel {
    width: 10px;  /* 默认尺寸 */
    height: 10px;
    background-color: #708090;
    cursor: pointer;
}

.pixel:hover {
    transform: scale(1.2);
    box-shadow: 0 0 5px rgba(0,0,0,0.5);
    z-index: 10;
}

/* --- 信息提示 --- */
#status-message {
    margin-top: 15px;
    font-style: italic;
    color: #666;
    word-break: break-word; /* 防止长文本溢出 */
}

.info {
    font-size: 0.9em;
    color: #888;
}

/* ================= 响应式优化 ================= */
/* 平板设备 */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .pixel {
        width: 8px;
        height: 8px;
    }
}

/* 手机设备 */
@media (max-width: 480px) {
    body {
        padding: 10px;
        align-items: flex-start; /* 顶部对齐 */
    }
    
    .container {
        padding: 12px;
        margin: 10px 0;
    }
    
    h1 {
        font-size: 1.3rem;
    }
    
    .controls {
        flex-direction: column; /* 垂直排列 */
        gap: 8px;
    }
    
    .pixel {
        width: 6px;
        height: 6px;
    }
    
    #colorPicker {
        width: 40px;
        height: 40px;
    }
    
    .info {
        font-size: 0.8rem;
    }
}

/* 小屏手机 */
@media (max-width: 360px) {
    .pixel {
        width: 5px;
        height: 5px;
    }
    
    #status-message {
        font-size: 0.9rem;
    }
}