/* 全局样式重置，减少默认样式差异 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

/* 头部样式 */
header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
}

/* 响应式：桌面端横向布局 */
@media (min-width: 768px) {
    .header-container {
        flex-direction: row;
        justify-content: space-between;
    }
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #2c3e50;
}

.logo span {
    color: #3498db;
}

.tip {
    font-size: 0.9rem;
    color: #666;
}

/* 主容器样式 */
.container {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* 搜索框样式 */
.search-box {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 1rem;
    margin-bottom: 2rem;
}

#emoji-search {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s ease;
}

#emoji-search:focus {
    border-color: #3498db;
}

/* Emoji分类导航 */
.category-nav {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 1rem;
    margin-bottom: 2rem;
    overflow-x: auto;
    white-space: nowrap;
}

.category-nav button {
    background-color: #f5f7fa;
    border: none;
    border-radius: 6px;
    padding: 0.5rem 1rem;
    margin: 0 0.5rem 0.5rem 0;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.category-nav button:hover {
    background-color: #3498db;
    color: #fff;
}

.category-nav button.active {
    background-color: #3498db;
    color: #fff;
}

/* Emoji网格 */
.emoji-grid {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 1.5rem;
    display: grid;
    /* 自适应列数，移动端最少2列，桌面端更多 */
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 1.5rem;
}

/* 响应式：移动端缩小网格间距和最小宽度 */
@media (max-width: 480px) {
    .emoji-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
        gap: 1rem;
    }
}

.emoji-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none; /* 禁止默认选中 */
}

.emoji-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.emoji-desc {
    font-size: 0.8rem;
    color: #666;
    text-align: center;
    word-break: break-all;
}

.emoji-item:hover {
    background-color: #f5f7fa;
    transform: scale(1.05);
}

/* 提示框样式 */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 0.8rem 1.5rem;
    border-radius: 6px;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1000;
}

.toast.show {
    opacity: 1;
}

/* 加载/空状态提示 */
.loading, .empty {
    text-align: center;
    padding: 2rem;
    color: #999;
    font-size: 1rem;
}