/**
 * 用户前端 - 底部导航样式
 */

/* 底部导航栏 */
.bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-bg-white);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
    padding-bottom: calc(var(--spacing-sm) + env(safe-area-inset-bottom));
    z-index: var(--z-fixed);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-xs);
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: var(--font-size-xs);
    transition: color var(--transition-base);
}

.nav-item.active {
    color: var(--color-primary);
}

.nav-item svg,
.nav-item .nav-icon {
    width: 24px;
    height: 24px;
    margin-bottom: 2px;
}

.nav-item .nav-text {
    font-size: 10px;
}

/* 导航项悬停效果 */
.nav-item:active {
    background: var(--color-bg-light);
}

/* 导航徽章 */
.nav-badge {
    position: absolute;
    top: 0;
    right: -4px;
    min-width: 16px;
    height: 16px;
    padding: 0 4px;
    font-size: 10px;
    line-height: 16px;
    text-align: center;
    background: var(--color-danger);
    color: var(--color-text-white);
    border-radius: var(--radius-full);
}

/* 带徽章的导航项 */
.nav-item.has-badge {
    position: relative;
}

/* 中间凸起的导航按钮 */
.nav-center {
    position: relative;
}

.nav-center .nav-item {
    position: relative;
    top: -15px;
}

.nav-center-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    color: var(--color-text-white);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--color-bg-white);
}

.nav-center-btn svg {
    width: 28px;
    height: 28px;
}

/* 响应式 */
@media (max-width: 360px) {
    .nav-item {
        padding: 2px;
    }
    
    .nav-item svg,
    .nav-item .nav-icon {
        width: 20px;
        height: 20px;
    }
    
    .nav-item .nav-text {
        font-size: 9px;
    }
}