/* 统一导航栏样式 */

/* 导航栏基础样式 */
.nav-header {
    background-color: #4f46e5;
    color: white;
    padding: 1rem 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 左侧导航 */
.nav-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* 返回按钮 */
.nav-back-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    color: white;
}

.nav-back-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.nav-back-btn i {
    font-size: 1.125rem;
    line-height: 1;
}

/* 导航标题 */
.nav-title {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-title h1 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.025em;
}

.nav-title p {
    font-size: 0.75rem;
    opacity: 0.8;
    margin: 0;
}

/* 右侧导航 */
.nav-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* 导航按钮 */
.nav-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    color: white;
    text-decoration: none;
}

.nav-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

.nav-btn i {
    font-size: 1.125rem;
    line-height: 1;
}

/* 导航按钮变体 */
.nav-btn-primary {
    background-color: rgba(255, 255, 255, 0.2);
}

.nav-btn-secondary {
    background-color: rgba(255, 255, 255, 0.1);
}

/* 响应式设计 */
@media (max-width: 640px) {
    .nav-header {
        padding: 0.75rem 1rem;
    }
    
    .nav-container {
        padding: 0 0.5rem;
    }
    
    .nav-left {
        gap: 1rem;
    }
    
    .nav-back-btn,
    .nav-btn {
        width: 2.25rem;
        height: 2.25rem;
    }
    
    .nav-back-btn i,
    .nav-btn i {
        font-size: 1rem;
    }
    
    .nav-title h1 {
        font-size: 1.125rem;
    }
    
    .nav-title p {
        font-size: 0.6875rem;
    }
    
    .nav-right {
        gap: 0.5rem;
    }
}

@media (max-width: 375px) {
    .nav-header {
        padding: 0.625rem 0.75rem;
    }
    
    .nav-container {
        padding: 0 0.25rem;
    }
    
    .nav-left {
        gap: 0.75rem;
    }
    
    .nav-back-btn,
    .nav-btn {
        width: 2rem;
        height: 2rem;
    }
    
    .nav-back-btn i,
    .nav-btn i {
        font-size: 0.875rem;
    }
    
    .nav-title h1 {
        font-size: 1rem;
    }
    
    .nav-title p {
        display: none;
    }
}

/* 导航栏动画 */
@keyframes navSlideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.nav-header {
    animation: navSlideDown 0.3s ease-out;
}

/* 按钮点击效果 */
.nav-btn:active,
.nav-back-btn:active {
    transform: scale(0.95);
}

/* 导航栏阴影效果 */
.nav-header {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
    .nav-header {
        background-color: #4338ca;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    }
    
    .nav-back-btn {
        background-color: rgba(255, 255, 255, 0.15);
    }
    
    .nav-back-btn:hover {
        background-color: rgba(255, 255, 255, 0.25);
    }
    
    .nav-btn {
        background-color: rgba(255, 255, 255, 0.08);
    }
    
    .nav-btn:hover {
        background-color: rgba(255, 255, 255, 0.15);
    }
}