/* 搜索框 */
.search-container {
    position: relative;
    max-width: 300px;
    width: 100%;
    flex-shrink: 0;
}

#searchInput {
    width: 100%;
    padding: 8px 16px 8px 36px;
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius-lg);
    outline: none;
    font-size: 14px;
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-fast);
    background-color: var(--bg-light);
    color: var(--text-primary);
    placeholder: "搜索小程序...";
}

#searchInput:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(64, 158, 255, 0.15);
    transform: translateY(-1px);
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray);
    font-size: 16px;
}

/* 分类导航 */
.category-nav {
    background-color: var(--bg-white);
    padding: var(--spacing-xs) var(--spacing-lg);
    box-shadow: var(--shadow-xs);
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    align-items: center;
}

.category-btn {
    padding: 6px 14px;
    background-color: var(--bg-light);
    color: var(--text-secondary);
    border: none;
    border-radius: var(--border-radius-lg);
    font-size: 13px;
    cursor: pointer;
    user-select: none;
    outline: none;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
    tabindex: 0;
}

.category-btn.active {
    background-color: var(--color-primary);
    color: var(--bg-white);
    box-shadow: 0 2px 8px rgba(64, 158, 255, 0.4);
    transform: translateY(-2px);
}

.category-btn:hover:not(.active) {
    background-color: #eee;
    transform: translateY(-2px);
}

.category-btn:active { transform: translateY(0); }
.category-btn.recent { background-color: rgba(114, 46, 209, 0.1); color: var(--color-purple); }
.category-btn.recent.active { background-color: var(--color-purple); color: white; }
.category-btn.favorite { background-color: rgba(247, 186, 30, 0.1); color: var(--color-yellow); }
.category-btn.favorite.active { background-color: var(--color-yellow); color: white; }

/* 应用卡片网格 */
.app-grid {
    display: flex;
    flex-wrap: wrap;
    padding: var(--spacing-md);
    gap: var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
    align-content: flex-start;
    justify-content: flex-start;
    align-items: flex-start;
}

/* 应用卡片（宽度协同图片比例，优化适配） */
.app-card {
    flex: 1 1 calc(20% - var(--spacing-md));
    min-width: calc(var(--icon-size) + 40px);
    max-width: calc(20% - var(--spacing-md));
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: var(--bg-white);
    border-radius: var(--border-radius-md);
    padding: 16px 0 8px;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    text-decoration: none;
    will-change: transform, box-shadow;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
    margin: 0;
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
    position: relative;
}

.app-card.offline {
    opacity: 0.7;
    background-color: #fafafa;
    border-color: #eee;
}

.app-card.offline:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
    background-color: #fafafa;
    border-color: #eee;
}

.app-card.offline .app-icon,
.app-card.offline .app-icon-img {
    filter: grayscale(60%);
}

.favorite-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    background: transparent;
    border: none;
    font-size: 16px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 5;
    transition: all var(--transition-fast);
    color: var(--color-gray);
    aria-label: "收藏该应用";
}

.favorite-btn::after { content: "☆"; }
.favorite-btn.active {
    color: var(--color-star);
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.6);
    transform: scale(1.1);
    aria-label: "取消收藏该应用";
}

.favorite-btn.active::after { content: "★"; }
.favorite-btn:hover { transform: scale(1.3); }

.app-card.offline::before {
    content: "待上线";
    position: absolute;
    top: 8px;
    left: 8px;
    background-color: var(--color-warning);
    color: white;
    font-size: 11px;
    padding: 2px 6px;
    border-radius: var(--border-radius-sm);
    z-index: 4;
    letter-spacing: 0.5px;
}

/* 卡片交互 */
.app-card:hover {
    transform: translateY(-5px) scale(1.03);
    box-shadow: 0 12px 24px rgba(64, 158, 255, 0.18);
    background: linear-gradient(135deg, #f8f9fa 0%, #e8f4ff 100%);
    border-color: rgba(64, 158, 255, 0.3);
}

.app-card:hover .app-icon,
.app-card:hover .app-icon-img {
    transform: scale(1.05);
    transition: transform 0.3s ease;
}

.app-card:active { transform: translateY(-1px) scale(0.99); }
.app-card.hidden { display: none; }
.app-card.loading { pointer-events: none; opacity: 0.8; }
.app-card.loading::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-primary);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    transform: translate(-50%, -50%);
}

.app-icon {
    width: var(--icon-size);
    height: var(--icon-size);
    background-color: #f5f5f5;
    border-radius: var(--border-radius-sm);
    border: 1px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: calc(var(--icon-size) * 0.6);
    margin-bottom: var(--spacing-sm);
    transition: transform var(--transition-normal);
    overflow: hidden;
}

.app-icon-img {
    width: 100%;
    height: 100%;
    object-fit: fill;
    background-color: inherit;
    border-radius: var(--border-radius-sm);
    border: 1px solid transparent;
    margin-bottom: var(--spacing-sm);
    transition: transform var(--transition-normal);
}

/* 文字图标内部容器 */
.app-icon-inner {
    font-size: calc(var(--icon-size) * 0.6);
    line-height: 1;
}

/* 图标颜色 */
.weather-icon { color: var(--color-primary); }
.calculator-icon { color: var(--color-success); }
.exchange-icon { color: var(--color-warning); }
.note-icon { color: var(--color-danger); }
.flashlight-icon { color: var(--color-gray); }
.timer-icon { color: var(--color-purple); }
.gobang-icon { color: var(--color-yellow); }

/* 应用名称 */
.app-name {
    font-size: 16px;
    color: var(--text-primary);
    font-weight: 500;
    text-align: center;
    padding: 0 var(--spacing-xs);
    margin-top: 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 响应式调整：卡片宽度随列数自适应 */
@media (max-width: 1400px) { 
    .app-card { 
        flex: 1 1 calc(20% - var(--spacing-md);
        max-width: calc(20% - var(--spacing-md));
        min-width: calc(var(--icon-size) + 40px);
    } 
}
@media (max-width: 1000px) { 
    .app-card { 
        flex: 1 1 calc(20% - var(--spacing-md);
        max-width: calc(20% - var(--spacing-md));
        min-width: calc(var(--icon-size) + 40px);
    } 
}
@media (max-width: 767px) { 
    .app-card { 
        flex: 1 1 calc(33.333% - var(--spacing-md);
        max-width: calc(33.333% - var(--spacing-md));
        min-width: calc(var(--icon-size) + 30px);
    } 
}
@media (max-width: 500px) { 
    .app-card { 
        flex: 1 1 calc(50% - var(--spacing-md);
        max-width: calc(50% - var(--spacing-md));
        min-width: calc(var(--icon-size) + 30px);
    } 
}
@media (max-width: 360px) { 
    .app-card { 
        flex: 1 1 100%;
        max-width: 100%;
        min-width: calc(var(--icon-size) + 40px);
    } 
}