/* public/css/style.css - 网密度科技色彩完整增强版 */

/* ==========================================================================
   1. 网密度色彩变量与主题设计 (Cyber Grid & High-Density Palette)
   ========================================================================== */
:root {
    /* 背景体系 */
    --bg-base: #0a0e17;
    --bg-surface: #111827;
    --bg-surface-elevated: #1a2333;
    --bg-card: rgba(17, 24, 39, 0.88);
    --bg-card-hover: rgba(26, 35, 51, 0.95);

    /* 网密度色彩：冷光青、电光蓝、赛博紫、警示金 */
    --cyber-blue: #00d2ff;
    --cyber-cyan: #00f2fe;
    --cyber-purple: #7928ca;
    --cyber-pink: #ff007f;
    --cyber-green: #10b981;
    --cyber-danger: #f43f5e;
    --cyber-danger-hover: #e11d48;

    /* 文章置顶专用高密度流光金 */
    --pin-gold: #ffb703;
    --pin-gold-hover: #ffa200;
    --pin-glow: rgba(255, 183, 3, 0.35);
    --pin-bg: rgba(255, 183, 3, 0.05);
    --pin-border: rgba(255, 183, 3, 0.4);

    /* 文本色阶 */
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --text-contrast: #ffffff;

    /* 边框与微光 */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-focus: var(--cyber-blue);
    --border-glow: rgba(0, 210, 255, 0.35);

    /* 高密点阵网格线 */
    --grid-line: rgba(0, 210, 255, 0.04);
}

/* ==========================================================================
   2. 全局基础结构 & 高密度网格背景
   ========================================================================== */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans", sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--bg-base);
    /* 高密度科技网格背景渲染 */
    background-image: 
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 26px 26px;
    background-position: -1px -1px;
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 92%;
    max-width: 1140px;
    margin: 25px auto;
    padding: 30px;
    background-color: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5), 0 0 1px rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    flex-grow: 1;
    box-sizing: border-box;
}

/* ==========================================================================
   3. 顶部统一高密度导航栏 (Header & Navbar)
   ========================================================================== */
header {
    background: rgba(10, 14, 23, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    color: var(--text-primary);
    padding: 0.85rem 2rem;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.45);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

header h1 {
    margin: 0;
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

header h1 a {
    color: var(--cyber-cyan);
    text-decoration: none;
    background: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 8px;
}

header nav {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

/* 导航链接项 */
.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}
.nav-link:hover, .nav-link.active {
    color: #ffffff;
    background: rgba(0, 210, 255, 0.12);
    border-color: rgba(0, 210, 255, 0.35);
}

.welcome-user {
    color: var(--text-secondary);
    font-size: 0.85rem;
    padding: 0.35rem 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 20px;
}

.welcome-user strong {
    color: var(--cyber-blue);
}

/* ==========================================================================
   4. 按钮系统 (Button Styles)
   ========================================================================== */
.button-action,
input[type="submit"],
.button-like,
.button-header:not(.danger) {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    color: #ffffff;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background: linear-gradient(135deg, #0284c7 0%, #00d2ff 100%);
    border: 1px solid rgba(0, 210, 255, 0.4);
    padding: 0.55rem 1.15rem;
    font-size: 0.92rem;
    line-height: 1.5;
    border-radius: 6px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    min-height: 38px;
    box-sizing: border-box;
    box-shadow: 0 2px 8px rgba(0, 210, 255, 0.25);
}

.button-action:hover,
input[type="submit"]:hover,
.button-like:hover,
.button-header:not(.danger):hover {
    background: linear-gradient(135deg, #0369a1 0%, #00bce6 100%);
    border-color: var(--cyber-cyan);
    box-shadow: 0 0 15px rgba(0, 210, 255, 0.5);
    transform: translateY(-1px);
}

.button-action:focus,
input[type="submit"]:focus,
.button-like:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 210, 255, 0.35);
}

/* 危险动作按钮 (登出、删除) */
.button-danger, button.danger, .button-header.danger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    color: #ffffff;
    cursor: pointer;
    background: linear-gradient(135deg, #e11d48 0%, #be123c 100%);
    border: 1px solid rgba(225, 29, 72, 0.4);
    padding: 0.55rem 1.15rem;
    font-size: 0.92rem;
    line-height: 1.5;
    border-radius: 6px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    min-height: 38px;
    box-sizing: border-box;
    box-shadow: 0 2px 8px rgba(225, 29, 72, 0.25);
}

.button-danger:hover, button.danger:hover, .button-header.danger:hover {
    background: linear-gradient(135deg, #be123c 0%, #9f1239 100%);
    box-shadow: 0 0 15px rgba(225, 29, 72, 0.5);
    transform: translateY(-1px);
}

.button-danger:focus, button.danger:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(225, 29, 72, 0.35);
}

.button-cancel {
    background: rgba(255, 255, 255, 0.08) !important;
    border-color: rgba(255, 255, 255, 0.15) !important;
    color: var(--text-secondary) !important;
    box-shadow: none !important;
}

.button-cancel:hover {
    background: rgba(255, 255, 255, 0.15) !important;
    color: #fff !important;
}

.button-danger.button-small {
    padding: 0.25rem 0.55rem;
    font-size: 0.8rem;
    min-height: 26px;
    min-width: 50px;
    line-height: 1.3;
}

/* ==========================================================================
   5. 表单与通用排版
   ========================================================================== */
h2 {
    color: #ffffff;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
    margin-top: 0;
    margin-bottom: 25px;
    font-weight: 600;
    font-size: 1.65rem;
    letter-spacing: 0.5px;
}

.form-styled div, form div {
    margin-bottom: 1.4rem;
}

.form-styled label, form label {
    display: block;
    margin-bottom: 0.55rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.checkbox-label {
    display: inline-block !important;
    font-weight: normal !important;
    margin-left: 0.5rem;
    vertical-align: middle;
    color: var(--text-primary) !important;
    cursor: pointer;
}

.form-styled input[type="text"], 
.form-styled input[type="password"], 
.form-styled select, 
.form-styled textarea,
form input[type="text"], 
form input[type="password"], 
form select, 
form textarea,
.form-styled input[type="number"],
input[type="search"] {
    display: block;
    width: 100%;
    padding: 0.65rem 0.9rem;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-sizing: border-box;
    transition: all 0.2s ease;
    min-height: 40px;
}

.form-styled input[type="file"], form input[type="file"] {
    padding: 8px 0;
    min-height: auto;
    border: none;
    color: var(--text-secondary);
}

.form-styled input[type="checkbox"], form input[type="checkbox"] {
    display: inline-block;
    width: auto;
    min-height: auto;
    vertical-align: middle;
    cursor: pointer;
}

.form-styled input:focus, form input:focus,
.form-styled select:focus, form select:focus,
.form-styled textarea:focus, form textarea:focus,
.form-styled input[type="number"]:focus,
input[type="search"]:focus {
    border-color: var(--cyber-blue);
    outline: 0;
    box-shadow: 0 0 12px var(--border-glow);
    background-color: var(--bg-surface-elevated);
}

.form-actions {
    margin-top: 2rem;
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

/* ==========================================================================
   6. 文章列表与高密置顶卡片样式 (Article List & Pinned Effect)
   ========================================================================== */
.note-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.note-item {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
    overflow: hidden;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.note-item:hover {
    border-color: var(--cyber-blue);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.6), 0 0 12px rgba(0, 210, 255, 0.15);
    transform: translateY(-2px);
}

/* 置顶样式：金黄流光与光条边缘 */
.note-item.pinned {
    background-color: var(--pin-bg);
    border-color: var(--pin-border);
    box-shadow: 0 0 18px var(--pin-glow);
}

.note-item.pinned::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--pin-gold), #ff5722);
}

.note-item.pinned:hover {
    border-color: var(--pin-gold);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.6), 0 0 20px rgba(255, 183, 3, 0.35);
}

.note-item h3 {
    margin-top: 0;
    margin-bottom: 6px;
    font-size: 1.35rem;
    font-weight: 600;
}

.note-item h3 a.note-title-link {
    color: #ffffff;
    text-decoration: none;
    transition: color 0.2s ease;
}

.note-item h3 a.note-title-link:hover {
    color: var(--cyber-cyan);
    text-shadow: 0 0 10px rgba(0, 242, 254, 0.4);
}

.note-item .note-owner {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: normal;
}

.note-item .note-meta {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    align-items: center;
}

.note-item .note-content-preview {
    font-size: 0.94rem;
    color: var(--text-secondary);
    word-break: break-word;
    max-height: 60px;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 10px;
    line-height: 1.6;
}

.note-item .note-actions {
    display: flex;
    gap: 10px;
    align-items: center;
    align-self: flex-start;
    flex-wrap: wrap;
}

.note-item .note-actions .button-action,
.note-item .note-actions .button-danger {
    padding: 0.4rem 0.85rem;
    font-size: 0.85rem;
    min-width: 70px;
    min-height: 32px;
}

/* 分类标签与草稿标签 */
.article-category {
    background: rgba(0, 210, 255, 0.12);
    color: var(--cyber-cyan);
    border: 1px solid rgba(0, 210, 255, 0.3);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 500;
    font-size: 0.8rem;
}

.article-status-draft {
    background: rgba(244, 63, 94, 0.15);
    color: #fb7185;
    border: 1px solid rgba(244, 63, 94, 0.35);
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 500;
    font-size: 0.8rem;
}

/* 置顶标志小徽章 */
.article-pinned-badge {
    display: inline-flex;
    align-items: center;
    background: linear-gradient(135deg, #ffb703 0%, #fb8500 100%);
    color: #0b0f19;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.78rem;
    letter-spacing: 0.5px;
    vertical-align: middle;
    box-shadow: 0 0 10px rgba(255, 183, 3, 0.4);
}

.current-attachment-info, .note-attachment {
    margin-top: 10px;
    font-size: 0.88em;
    color: var(--text-secondary);
}

.current-attachment-info a, .note-attachment a {
    color: var(--cyber-blue);
    text-decoration: none;
    font-weight: 500;
}

.current-attachment-info a:hover, .note-attachment a:hover {
    text-decoration: underline;
    color: var(--cyber-cyan);
}

/* ==========================================================================
   7. 富文本编辑器样式 (Rich Text Editor)
   ========================================================================== */
.rich-text-editor-wrapper {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-top: 5px;
    background-color: var(--bg-surface);
    overflow: hidden;
}

#richTextToolbar {
    padding: 6px;
    background-color: var(--bg-surface-elevated);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 5px;
}

#richTextToolbar > button,
#richTextToolbar > select,
#richTextToolbar > input[type="color"],
#richTextToolbar > label.sr-only {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    vertical-align: middle;
    margin: 1px;
    padding: 0 6px;
    font-size: 0.85rem;
    background-color: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    height: 30px;
    box-sizing: border-box;
    transition: all 0.15s ease;
    cursor: pointer;
}

#richTextToolbar > select {
    padding-left: 6px;
    padding-right: 20px;
    min-width: 60px;
    max-width: 120px;
    background-color: var(--bg-surface-elevated);
    color: var(--text-primary);
}

#richTextToolbar > input[type="color"] {
    padding: 0;
    width: 30px;
    border-width: 1px;
    background: transparent;
}

#richTextToolbar > button:hover,
#richTextToolbar > select:hover,
#richTextToolbar > input[type="color"]:hover {
    background-color: rgba(0, 210, 255, 0.15);
    border-color: var(--cyber-blue);
    color: #fff;
}

.sr-only {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border-width: 0 !important;
}

#richContent {
    border: none;
    padding: 16px;
    min-height: 180px;
    max-height: 400px;
    background-color: var(--bg-surface);
    overflow-y: auto;
    line-height: 1.7;
    color: var(--text-primary);
    flex-grow: 1;
}

#richContent:focus {
    outline: none;
    background-color: var(--bg-surface-elevated);
}

/* ==========================================================================
   8. 消息提示 (Alert / Messages)
   ========================================================================== */
.error-message, .success-message, .info-message {
    padding: 0.85rem 1.25rem;
    margin-bottom: 1.3rem;
    border-radius: 6px;
    font-size: 0.95rem;
}

.error-message {
    color: #fca5a5;
    background-color: rgba(225, 29, 72, 0.15);
    border: 1px solid rgba(225, 29, 72, 0.4);
}

.success-message {
    color: #6ee7b7;
    background-color: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.4);
}

.info-message {
    color: #93c5fd;
    background-color: rgba(59, 130, 246, 0.15);
    border: 1px solid rgba(59, 130, 246, 0.4);
}

/* ==========================================================================
   9. 用户管理面板 (User List in Admin)
   ========================================================================== */
.user-list {
    list-style-type: none;
    padding: 0;
    margin-top: 25px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.user-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    border-radius: 6px;
    transition: all 0.2s ease;
}

.user-item:hover {
    border-color: rgba(0, 210, 255, 0.4);
    background-color: var(--bg-surface-elevated);
}

.user-item span {
    color: var(--text-secondary);
}

.user-item span strong {
    color: var(--text-primary);
}

.user-item .user-item-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.user-item .user-item-actions .button-action,
.user-item .user-item-actions .button-danger {
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
    min-width: 65px;
    min-height: 30px;
}

/* ==========================================================================
   10. 表单专用容器 & 过滤组件
   ========================================================================== */
.form-container {
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.form-container h2 {
    text-align: left;
}

.category-filter select {
    min-height: 38px;
    box-sizing: border-box;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem;
    width: 100%;
    background-color: var(--bg-surface);
    color: var(--text-primary);
}

.category-filter select:focus {
    border-color: var(--cyber-blue);
    outline: 0;
    box-shadow: 0 0 10px var(--border-glow);
}

/* ==========================================================================
   11. 分页组件 (Pagination)
   ========================================================================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    list-style: none;
    padding: 20px 0 0 0;
    flex-wrap: wrap;
}

.pagination-item {
    margin: 2px;
}

.pagination-link {
    display: block;
    padding: 0.45rem 0.9rem;
    min-width: 38px;
    box-sizing: border-box;
    text-align: center;
    text-decoration: none;
    color: var(--text-secondary);
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: all 0.2s ease;
    cursor: pointer;
    font-weight: 500;
}

.pagination-link:hover {
    background-color: rgba(0, 210, 255, 0.12);
    border-color: var(--cyber-blue);
    color: #ffffff;
}

.pagination-item.active .pagination-link {
    background: var(--cyber-blue);
    color: #0a0e17;
    border-color: var(--cyber-blue);
    font-weight: 700;
    cursor: default;
    box-shadow: 0 0 12px rgba(0, 210, 255, 0.5);
}

.pagination-item.disabled .pagination-link {
    color: var(--text-muted);
    background-color: rgba(255, 255, 255, 0.02);
    border-color: rgba(255, 255, 255, 0.05);
    cursor: not-allowed;
}

/* ==========================================================================
   12. 评论区样式 (Comments Area)
   ========================================================================== */
.comments-section {
    margin-top: 35px;
    padding-top: 25px;
    border-top: 1px solid var(--border-color);
}

#commentsList {
    list-style-type: none;
    padding: 0;
    margin-bottom: 20px;
}

.comment-item {
    border: 1px solid var(--border-color);
    background: var(--bg-surface);
    padding: 14px 18px;
    border-radius: 6px;
    margin-bottom: 12px;
}

.comment-meta {
    font-size: 0.88em;
    color: var(--text-secondary);
    margin-bottom: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.comment-meta strong {
    color: var(--cyber-cyan);
    font-size: 1.02em;
}

.comment-meta span {
    font-size: 0.85em;
    color: var(--text-muted);
    margin-left: 10px;
}

.comment-content {
    word-wrap: break-word;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.comment-actions {
    text-align: right;
}

#commentForm textarea {
    min-height: 80px;
    margin-bottom: 10px;
}

#commentForm .form-actions {
    margin-top: 0;
}

/* ==========================================================================
   13. 页脚 (Footer)
   ========================================================================== */
footer {
    text-align: center;
    padding: 25px;
    background-color: rgba(10, 14, 23, 0.95);
    color: var(--text-muted);
    margin-top: auto;
    font-size: 0.88rem;
    border-top: 1px solid var(--border-color);
}

footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--cyber-cyan);
}

/* ==========================================================================
   14. 移动端自适应排版 (@media max-width: 768px)
   ========================================================================== */
@media (max-width: 768px) {
    .container {
        width: 95%;
        padding: 16px;
        margin: 15px auto;
    }

    .form-container {
        max-width: 100%;
    }

    header {
        padding: 0.75rem 1rem;
    }

    header h1 {
        font-size: 1.25rem;
    }

    header nav {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        gap: 6px;
    }

    header nav .button-action,
    header nav .button-danger,
    header nav .nav-link {
        padding: 0.35rem 0.65rem;
        font-size: 0.82rem;
        min-height: 32px;
    }

    header nav .welcome-user {
        width: 100%;
        text-align: center;
        margin-bottom: 6px;
        order: -1;
    }

    .button-action:not(.button-header),
    input[type="submit"]:not(.button-header),
    .button-like:not(.button-header),
    .button-danger:not(.button-header) {
        padding: 0.5rem 0.8rem;
        font-size: 0.9rem;
        min-height: 36px;
    }

    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .form-actions .button-action, 
    .form-actions .button-danger {
        width: 100%;
        margin-bottom: 8px;
    }

    .toolbar-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .toolbar-actions #searchForm,
    .toolbar-actions .category-filter,
    .toolbar-actions #clearSearchButton {
        min-width: 100%;
    }

    .note-item .note-actions {
        flex-direction: row;
        flex-wrap: wrap;
        width: 100%;
        justify-content: flex-start;
        gap: 8px;
    }

    .user-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .user-item .user-item-actions {
        width: 100%;
    }

    .user-item .user-item-actions .button-action,
    .user-item .user-item-actions .button-danger {
        flex-grow: 1;
    }

    #richTextToolbar {
        justify-content: flex-start;
        gap: 4px;
        padding: 4px;
    }

    #richTextToolbar > button,
    #richTextToolbar > select,
    #richTextToolbar > input[type="color"] {
        padding: 2px 4px;
        font-size: 0.78rem;
        height: 28px;
    }

    #richContent {
        min-height: 130px;
        max-height: 260px;
    }
}