/* DrugBank导航栏风格 - 参考DrugBank网站的交互效果 */

/* 导航栏容器 */
.navbar-container {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-bottom: 1px solid #dee2e6;
    position: relative;
    overflow: hidden;
}

.navbar-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="diagonal" width="20" height="20" patternUnits="userSpaceOnUse"><path d="M0,0 L20,20 M20,0 L0,20" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23diagonal)"/></svg>');
    opacity: 0.3;
}

/* 主导航栏 */
.main-navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    height: 70px;
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
}

/* Logo样式 */
.navbar-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: all 0.3s ease;
}

.navbar-logo:hover {
    transform: translateY(-1px);
}

.navbar-logo img {
    height: 32px;
    width: auto;
    object-fit: contain;
    transition: all 0.3s ease;
    border-radius: 6px;
}



/* 导航菜单 */
.navbar-menu {
    display: flex;
    align-items: center;
    gap: 0;
    list-style: none;
    margin: 0;
    padding: 0;
}

.navbar-menu li {
    position: relative;
}

.navbar-menu a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    border-radius: 8px;
    margin: 0 0.25rem;
}

/* 悬停效果 */
.navbar-menu a:hover {
    color: var(--primary-color);
    background: rgba(44, 90, 160, 0.05);
    transform: translateY(-1px);
}

/* 活动状态 */
.navbar-menu a.active {
    color: var(--primary-color);
    background: rgba(44, 90, 160, 0.1);
    font-weight: 600;
}

.navbar-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* 下拉箭头 */
.navbar-menu a .dropdown-arrow {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.navbar-menu a:hover .dropdown-arrow {
    transform: rotate(180deg);
}

/* 特殊高亮效果（参考DrugBank的Academic Research） */
.navbar-menu a.highlight {
    color: #e74c3c;
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid rgba(231, 76, 60, 0.2);
}

.navbar-menu a.highlight:hover {
    background: rgba(231, 76, 60, 0.15);
    border-color: rgba(231, 76, 60, 0.3);
}

/* 认证按钮区域 */
.navbar-auth {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.auth-button {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.auth-button.primary {
    background: var(--primary-color);
    color: white;
    border: none;
}

.auth-button.primary:hover {
    background: #1e4a7a;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(44, 90, 160, 0.2);
}

.auth-button.secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.auth-button.secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-navbar {
        padding: 0 1rem;
        height: 60px;
    }
    
    .navbar-menu {
        display: none;
    }
    
    .navbar-logo {
        font-size: 1.3rem;
    }
    
    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
}

/* 动画效果 */
@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.navbar-menu a {
    animation: slideInDown 0.3s ease-out;
}

/* 微交互效果 */
.navbar-menu a::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at center, rgba(44, 90, 160, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 8px;
    pointer-events: none;
}

.navbar-menu a:hover::before {
    opacity: 1;
}

/* 搜索框集成 */
.navbar-search {
    display: flex;
    align-items: center;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem;
    margin-left: 1rem;
    transition: all 0.3s ease;
    max-width: 300px;
}

.navbar-search:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

.navbar-search input {
    border: none;
    outline: none;
    background: transparent;
    padding: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-primary);
    width: 100%;
}

.navbar-search input::placeholder {
    color: var(--text-muted);
}

.navbar-search button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.navbar-search button:hover {
    background: #1e4a7a;
    transform: scale(1.05);
}