/**
 * OpenMTSciEd 统一导航组件样式
 * 用于所有 HTML 页面的导航栏
 */

/* 导航栏基础样式 */
.navbar {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    padding: 0 2rem;
    height: 64px;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(99, 102, 241, 0.2);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

/* 导航内容容器 */
.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    height: 100%;
}

/* Logo 样式 */
.navbar-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color, #6366f1), var(--accent-color, #06b6d4));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    transition: opacity 0.3s;
}

.navbar-logo:hover {
    opacity: 0.8;
}

.navbar-logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    -webkit-background-clip: initial;
    background-clip: initial;
    -webkit-text-fill-color: initial;
    filter: invert(85%) sepia(90%) saturate(500%) hue-rotate(10deg) brightness(1.1);
}

/* 导航链接列表 */
.navbar-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
    height: 100%;
}

/* 导航链接样式 */
.navbar-links a {
    color: var(--text-secondary, #94a3b8);
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    height: 100%;
}

/* 链接悬停效果 - 下划线动画 */
.navbar-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color, #6366f1), var(--accent-color, #06b6d4));
    transition: width 0.3s ease;
}

.navbar-links a:hover {
    color: var(--text-primary, #f8fafc);
}

.navbar-links a:hover::after {
    width: 100%;
}

/* 激活状态的链接 */
.navbar-links a.active {
    color: var(--text-primary, #f8fafc);
}

.navbar-links a.active::after {
    width: 100%;
}

/* 移动端菜单按钮（默认隐藏） */
.navbar-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.navbar-toggle-icon {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text-primary, #f8fafc);
    margin: 5px 0;
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* 响应式设计 - 平板和手机 */
@media (max-width: 768px) {
    .navbar {
        padding: 0 1rem;
        height: 60px;
    }

    .navbar-toggle {
        display: block;
        z-index: 1001;
    }

    /* 汉堡菜单动画 */
    .navbar-toggle.active .navbar-toggle-icon:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .navbar-toggle.active .navbar-toggle-icon:nth-child(2) {
        opacity: 0;
    }

    .navbar-toggle.active .navbar-toggle-icon:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .navbar-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: rgba(15, 23, 42, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transition: right 0.3s ease;
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.3);
    }

    .navbar-links.active {
        right: 0;
    }

    .navbar-links a {
        font-size: 1.2rem;
        padding: 1rem 2rem;
    }

    .navbar-logo {
        font-size: 1.2rem;
    }

    .navbar-logo-icon {
        width: 28px;
        height: 28px;
    }
}

/* 小屏幕手机优化 */
@media (max-width: 480px) {
    .navbar {
        padding: 0.8rem 1rem;
    }

    .navbar-logo {
        font-size: 1.1rem;
    }

    .navbar-logo-icon {
        width: 24px;
        height: 24px;
    }
}

/* ==================== 用户登录控件样式 ==================== */

/* 已登录控制区 */
.logged-in-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* 认证区域容器 */
.navbar-auth {
    position: relative;
    display: flex;
    align-items: center;
}

/* 认证按钮容器 */
.auth-buttons {
    display: flex;
    gap: 1rem;
    align-items: center;
    height: 40px;
}

/* 登录按钮 */
.btn-login {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1.2rem;
    background: linear-gradient(135deg, var(--primary-color, #6366f1), var(--accent-color, #06b6d4));
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
    white-space: nowrap;
    height: 36px;
    line-height: 1;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-login:active {
    transform: translateY(0);
}

.btn-login svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

/* 切换账号按钮样式 - 更低调 */
.btn-login.switch-account {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.25);
    box-shadow: none;
    color: rgba(255, 255, 255, 0.85);
}

.btn-login.switch-account:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* 模拟登录按钮 - 优化版 */
.btn-mock-login {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    white-space: nowrap;
    height: 36px;
    line-height: 1;
}

.btn-mock-login:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-mock-login:active {
    transform: translateY(0);
}

.btn-mock-login svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* 用户菜单容器 */
.user-menu {
    position: relative;
}

/* 用户信息 */
.user-info {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.5rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    height: 36px;
    box-sizing: border-box;
}

.user-info:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: rgba(99, 102, 241, 0.5);
}

/* 用户头像 */
.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color, #6366f1), var(--accent-color, #06b6d4));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* 用户名 */
.user-name {
    color: var(--text-primary, #f8fafc);
    font-weight: 600;
    font-size: 0.95rem;
}

/* 下拉菜单 */
.user-dropdown {
    position: absolute;
    top: calc(100% + 0.8rem);
    right: 0;
    min-width: 240px;
    background: var(--card-bg, #1e293b);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    overflow: hidden;
    padding: 0.75rem 0;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.user-menu:hover .user-dropdown,
.user-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 下拉菜单项 */
.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem 0.75rem 1.75rem;
    color: var(--text-secondary, #cbd5e1);
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.9rem;
    font-weight: 500;
    position: relative;
    border-left: 3px solid transparent;
}

.dropdown-item:hover {
    background: rgba(99, 102, 241, 0.12);
    color: var(--text-primary, #f8fafc);
    border-left-color: var(--primary-color, #6366f1);
}

.dropdown-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: 0.75;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    transform: scale(1);
}

.dropdown-item:hover svg {
    opacity: 1;
    transform: scale(1.1);
}

/* 分割线 */
.dropdown-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.3), transparent);
    margin: 0.75rem 1.5rem;
}

/* 退出登录项 */
.dropdown-item.logout {
    color: #ef4444;
    font-weight: 600;
}

.dropdown-item.logout:hover {
    background: rgba(239, 68, 68, 0.12);
    color: #f87171;
    border-left-color: #ef4444;
}

.dropdown-item.logout:hover svg {
    transform: scale(1.1) translateX(-2px);
}

/* 移动端响应式 */
@media (max-width: 768px) {
    .navbar-auth {
        margin-left: 0;
        margin-top: 1rem;
        width: 100%;
    }

    .btn-login {
        width: 100%;
        justify-content: center;
        padding: 0.8rem 1.5rem;
    }

    .user-info {
        width: 100%;
        justify-content: center;
    }

    .user-dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        margin-top: 0.5rem;
        box-shadow: none;
        border: 1px solid rgba(99, 102, 241, 0.2);
    }

    .dropdown-item {
        padding: 1rem 1.5rem;
    }
}

/* 滚动时的导航栏效果 */
.navbar.scrolled {
    background: rgba(15, 23, 42, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    padding: 0.8rem 2rem;
}

@media (max-width: 768px) {
    .navbar.scrolled {
        padding: 0.8rem 1rem;
    }
}