/**
 * PDF工具箱 - 主样式文件
 * 
 * 该文件包含PDF工具网站的所有自定义样式，包括：
 * - 顶部导航栏样式
 * - 左侧侧边栏样式
 * - 主内容区样式
 * - 页脚样式
 * - 响应式布局适配
 */

/* ==================== 基础变量 ==================== */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --bg-light: #f8fafc;
    --bg-dark: #1e293b;
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 0px;
    --navbar-height: 60px;
    --footer-height: auto;
    --transition-speed: 0.3s;
}

/* ==================== 全局样式 ==================== */
* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-light);
    padding-top: var(--navbar-height);
    min-height: 100vh;
}

/* ==================== 顶部导航栏 ==================== */
.main-navbar {
    height: var(--navbar-height);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    z-index: 1030;
}

.main-navbar .navbar-brand {
    font-weight: 600;
    font-size: 1.25rem;
}

.main-navbar .navbar-brand i {
    color: #fff;
}

.main-navbar .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all var(--transition-speed);
}

.main-navbar .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 0.375rem;
}

.main-navbar .dropdown-menu {
    border: none;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border-radius: 0.5rem;
    margin-top: 0.5rem;
}

.main-navbar .dropdown-item {
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    transition: all var(--transition-speed);
}

.main-navbar .dropdown-item:hover {
    background-color: #f1f5f9;
    color: var(--primary-color);
}

.main-navbar .dropdown-item i {
    color: var(--secondary-color);
}

.main-navbar .dropdown-item:hover i {
    color: var(--primary-color);
}

/* ==================== 主体容器 ==================== */
.main-container {
    display: flex;
    min-height: calc(100vh - var(--navbar-height));
}

/* ==================== 左侧侧边栏 ==================== */
.sidebar {
    width: var(--sidebar-width);
    background-color: #fff;
    border-right: 1px solid #e2e8f0;
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    height: calc(100vh - var(--navbar-height));
    overflow-y: auto;
    z-index: 1020;
    transition: transform var(--transition-speed);
}

.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid #e2e8f0;
    display: none;
}

.sidebar .accordion {
    --bs-accordion-border-width: 0;
    --bs-accordion-border-radius: 0;
}

.sidebar .accordion-item {
    border: none;
    border-bottom: 1px solid #e2e8f0;
}

.sidebar .accordion-button {
    padding: 1rem 1.25rem;
    font-weight: 600;
    color: #334155;
    background-color: transparent;
    box-shadow: none;
}

.sidebar .accordion-button:not(.collapsed) {
    background-color: #eff6ff;
    color: var(--primary-color);
}

.sidebar .accordion-button:focus {
    box-shadow: none;
}

.sidebar .accordion-button::after {
    width: 1rem;
    height: 1rem;
    background-size: 1rem;
}

.sidebar .accordion-button i {
    color: var(--primary-color);
}

.sidebar .accordion-body {
    padding: 0;
    background-color: #f8fafc;
}

.sidebar .accordion-body ul li {
    border-bottom: 1px solid #e2e8f0;
}

.sidebar .accordion-body ul li:last-child {
    border-bottom: none;
}

.sidebar-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: #64748b;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all var(--transition-speed);
}

.sidebar-link:hover {
    background-color: #e0f2fe;
    color: var(--primary-color);
    text-decoration: none;
}

.sidebar-link i {
    font-size: 1rem;
    color: #94a3b8;
    margin-right: 0.5rem;
}

.sidebar-link:hover i {
    color: var(--primary-color);
}

.sidebar-link.active {
    background-color: #dbeafe;
    color: var(--primary-color);
    font-weight: 600;
    border-left: 3px solid var(--primary-color);
}

.sidebar-link.active i {
    color: var(--primary-color);
}

/* ==================== 主内容区 ==================== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 1.5rem;
    min-height: calc(100vh - var(--navbar-height) - 300px);
    position: relative;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1015;
}

.sidebar-toggle-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    z-index: 1010;
    display: flex;
    align-items: center;
    justify-content: center;
}

.content-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

/* ==================== 页脚 ==================== */
.footer {
    margin-left: var(--sidebar-width);
    background-color: #0583D2 !important;
}

.footer-brand {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
}

.footer-brand:hover {
    color: #fff;
    text-decoration: none;
}

.footer h5 {
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    transition: color var(--transition-speed);
}

.footer-links a:hover {
    color: #fff;
    text-decoration: none;
}

.footer-contact li {
    color: #94a3b8;
    margin-bottom: 0.5rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    margin-right: 0.75rem;
    color: #94a3b8;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all var(--transition-speed);
}

.social-link:hover {
    color: #fff;
    background-color: var(--primary-color);
    text-decoration: none;
}

/* ==================== 响应式布局 ==================== */
@media (max-width: 991.98px) {
    /* 平板及以下设备 */
    .sidebar {
        transform: translateX(-100%);
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .sidebar-header {
        display: flex;
        justify-content: flex-end;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .footer {
        margin-left: 0;
    }
    
    .sidebar-overlay.show {
        display: block;
    }
}

@media (max-width: 767.98px) {
    /* 手机设备 */
    :root {
        --navbar-height: 56px;
    }
    
    .main-navbar .navbar-brand {
        font-size: 1.1rem;
    }
    
    .main-navbar .brand-text {
        display: none;
    }
    
    .main-content {
        padding: 1rem;
    }
    
    .footer .row > div {
        text-align: center;
    }
    
    .footer-brand {
        justify-content: center;
    }
    
    .social-link {
        margin: 0 0.375rem;
    }
}

@media (max-width: 575.98px) {
    /* 小屏手机 */
    .main-navbar .dropdown-menu {
        position: static;
        float: none;
        width: auto;
        margin-top: 0;
        background-color: transparent;
        border: 0;
        box-shadow: none;
    }
    
    .main-navbar .dropdown-item {
        color: rgba(255, 255, 255, 0.8);
        padding-left: 2rem;
    }
    
    .main-navbar .dropdown-item:hover {
        background-color: rgba(255, 255, 255, 0.1);
        color: #fff;
    }
    
    .main-navbar .dropdown-divider {
        border-color: rgba(255, 255, 255, 0.1);
    }
}

/* ==================== 打印样式 ==================== */
@media print {
    .sidebar,
    .main-navbar,
    .footer,
    .sidebar-toggle-btn {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
        padding: 0;
    }
}

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

.main-content > * {
    animation: fadeIn 0.3s ease;
}

/* ==================== 滚动条样式 ==================== */
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.sidebar::-webkit-scrollbar-track {
    background: #f1f5f9;
}

.sidebar::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* ==================== 工具类 ==================== */
.text-primary {
    color: var(--primary-color) !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

/* 赞赏码样式 */
.appreciation-code {
    position: fixed;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    background-color: #fff;
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    text-align: center;
    width: 150px;
}

.appreciation-code img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    border: 2px solid #e2e8f0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.appreciation-code p {
    font-size: 12px;
    color: #000;
    margin: 0;
    font-weight: 500;
    line-height: 1.4;
    letter-spacing: 0.5px;
    text-shadow: 0 1px 1px rgba(0,0,0,0.05);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .appreciation-code {
        right: 15px;
        width: 120px;
        padding: 10px;
    }
    
    .appreciation-code p {
        font-size: 12px;
    }
}

@media (max-width: 576px) {
    .appreciation-code {
        right: 10px;
        width: 100px;
        padding: 8px;
    }
    
    .appreciation-code p {
        font-size: 10px;
    }
}