/**
 * 公版书籍系统 - 页面样式（补充层）
 * 依赖：design-system.css（全局设计变量和通用组件）
 * 
 * 本文件仅包含：
 * - 当前版本独有的页面样式（auth表单、用户区域、响应式补充等）
 * - 与 design-system.css 不重复的组件
 */

/* ============================================
   章节标题（首页独有）
   ============================================ */
.section {
    margin-top: 50px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title::before {
    content: '';
    width: 4px;
    height: 24px;
    background: var(--primary);
    border-radius: 2px;
}

/* ============================================
   搜索结果 - 筛选栏
   ============================================ */
.filter-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.filter-btn {
    padding: 6px 16px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

/* ============================================
   搜索结果 - 书籍操作区
   ============================================ */
.book-item-actions {
    margin-top: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.has-resource {
    font-size: 13px;
    color: var(--primary);
}

/* ============================================
   搜索结果 - 网盘标签
   ============================================ */
.netdisk-tags {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.netdisk-tags-label {
    font-size: 13px;
    color: var(--text-muted);
}

.netdisk-tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    background: var(--primary-bg);
    color: var(--primary-dark);
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
}

/* ============================================
   网盘资源列表
   ============================================ */
.netdisk-list {
    display: grid;
    gap: 12px;
}

.netdisk-item {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    background: var(--bg);
    border-radius: var(--radius);
    gap: 16px;
    transition: var(--transition);
}

.netdisk-item:hover {
    background: var(--primary-bg);
}

.netdisk-icon {
    font-size: 28px;
    color: var(--primary);
}

.netdisk-name {
    flex: 1;
    font-weight: 500;
}

/* ============================================
   顶部导航 - 用户区域
   ============================================ */
.header-user {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.nav-user-id {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-bg);
    padding: 4px 10px;
    border-radius: 20px;
    letter-spacing: 0.5px;
}

.nav-logout {
    font-size: 14px;
    color: var(--text-muted) !important;
}

.nav-logout:hover {
    color: var(--text) !important;
}

/* ============================================
   注册 / 登录 表单页
   ============================================ */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
    padding: 40px 20px;
}

.auth-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    padding: 48px 40px;
    width: 100%;
    max-width: 420px;
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo {
    font-size: 48px;
    margin-bottom: 12px;
}

.auth-header h2 {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
}

.auth-header p {
    font-size: 14px;
    color: var(--text-muted);
}

.auth-error {
    background: #fff3f3;
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    padding: 12px 16px;
    font-size: 14px;
    color: var(--accent-dark);
    margin-bottom: 20px;
}

.auth-form .form-group {
    margin-bottom: 20px;
}

.auth-form label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}

.auth-form input[type="text"],
.auth-form input[type="password"] {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    font-size: 15px;
    color: var(--text);
    background: var(--bg);
    transition: var(--transition);
    outline: none;
}

.auth-form input[type="text"]:focus,
.auth-form input[type="password"]:focus {
    border-color: var(--primary);
    background: var(--bg-white);
    box-shadow: 0 0 0 3px rgba(65, 128, 96, 0.12);
}

.form-tip {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 24px;
    padding: 12px 14px;
    background: var(--primary-bg);
    border-radius: var(--radius-sm);
}

.auth-btn {
    display: block;
    width: 100%;
    padding: 13px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    text-align: center;
    transition: var(--transition);
    text-decoration: none;
}

.auth-btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 3px 12px rgba(65, 128, 96, 0.3);
}

.auth-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 5px 18px rgba(65, 128, 96, 0.4);
    color: #fff;
}

.auth-btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.auth-btn-outline:hover {
    background: var(--primary-bg);
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: var(--text-muted);
}

.auth-footer a {
    color: var(--primary);
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* 注册成功区域 */
.auth-success {
    text-align: center;
    padding: 10px 0;
}

.success-icon {
    font-size: 56px;
    margin-bottom: 16px;
}

.auth-success h2 {
    font-family: var(--font-serif);
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.success-tip {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.user-id-display {
    margin: 12px auto 20px;
    display: inline-block;
}

.user-id-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: 8px;
    font-variant-numeric: tabular-nums;
}

.success-warn {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.8;
    background: #fffde7;
    border: 1px solid #ffe082;
    border-radius: var(--radius);
    padding: 14px 16px;
    text-align: left;
}

/* ============================================
   书籍详情页 - 登录墙（补充）
   ============================================ */
.login-wall-btns .auth-btn {
    width: auto;
    padding: 10px 32px;
    font-size: 15px;
}

/* ============================================
   响应式 - 移动端适配
   ============================================ */
@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
        height: auto;
        padding: 12px 20px;
        gap: 12px;
    }
    
    .header-search {
        margin-left: 0;
        order: 3;
        width: 100%;
    }
    
    .header-search input {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .auth-card {
        padding: 32px 24px;
    }

    .user-id-number {
        font-size: 36px;
        letter-spacing: 5px;
    }

    .header-user {
        gap: 6px;
    }

    .nav-user-id {
        font-size: 12px;
        padding: 3px 8px;
    }
}