/*
Theme Name: Kaxim
Theme URI: https://kaxim.wang/
Author: Kaxim
Author URI: https://kaxim.wang/
Description: 一套适用于 WordPress 的简洁、轻量的极简博客主题。支持三套主题模式（默认/护眼/夜晚），专注阅读体验。
Version: 2.0.1
Requires at least: 6.0
Tested up to: 6.5.8
Requires PHP: 7.4
License: GPL v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: Kaxim
Tags: blog, one-column, custom-menu, featured-images, threaded-comments, translation-ready, theme-options, custom-background
*/

/* ============================================
   CSS Custom Properties — 主题变量系统 V2
   ============================================ */

/* --- 默认模式 (Light) — 现代简约风 --- */
:root {
    /* 颜色 — 柔和灰度，避免纯黑纯白 */
    --bg-color: #FAFAFC;
    --bg-secondary: #F3F4F6;
    --text-color: #7a7a7a;
    --title-color: #333333;
    --link-color: #3B82F6;
    --link-hover: #2563EB;
    --link-visited: #6366F1;
    --border-color: #E5E7EB;
    --meta-color: #9CA3AF;
    --code-bg: #F3F4F6;
    --blockquote-border: #D1D5DB;
    --blockquote-bg: #F9FAFB;
    --selection-bg: #93C5FD;
    --selection-color: #1E3A5F;

    /* 字体 — 现代系统字体栈 */
    --font-body: "Source Sans Pro", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --font-heading: "Source Sans Pro", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Cascadia Code", Consolas, monospace;

    /* 字号 — 稍大，更舒适 */
    --fs-site-title: 30px;
    --fs-post-title: 18px;
    --fs-body: 15px;
    --fs-meta: 13px;
    --fs-small: 12px;
    --fs-code: 13px;

    /* 行高 */
    --lh-body: 1.75;
    --lh-heading: 1.4;

    /* 间距 — 更宽松 */
    --content-width: 680px;
    --content-padding: 24px;
    --section-gap: 48px;
    --post-gap: 36px;

    /* 圆角 — 更柔和 */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-color: all 0.2s ease;
}

/* --- 护眼模式 (Eye-care / Sepia) --- */
[data-theme="eyecare"] {
    --bg-color: #FBF9F7;
    --bg-secondary: #F5F0E8;
    --text-color: #6B5D4D;
    --title-color: #4A3F35;
    --link-color: #B8860B;
    --link-hover: #996B00;
    --link-visited: #8B7355;
    --border-color: #E8E0D5;
    --meta-color: #A89080;
    --code-bg: #F5F0E8;
    --blockquote-border: #D4C4B0;
    --blockquote-bg: #FAF7F2;
    --selection-bg: #D4C4B0;
    --selection-color: #4A3F35;
}

/* --- 夜晚模式 (Dark) --- */
[data-theme="night"] {
    --bg-color: #0F0F14;
    --bg-secondary: #1A1A24;
    --text-color: #C9CDD4;
    --title-color: #F3F4F6;
    --link-color: #60A5FA;
    --link-hover: #93C5FD;
    --link-visited: #A78BFA;
    --border-color: #2D2D3A;
    --meta-color: #6B7280;
    --code-bg: #1A1A24;
    --blockquote-border: #3D3D4D;
    --blockquote-bg: #16161E;
    --selection-bg: #3D3D5C;
    --selection-color: #F3F4F6;
}


/* ============================================
   Reset & Base
   ============================================ */

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    font-size: var(--fs-body);
    line-height: var(--lh-body);
    transition: var(--transition-color);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

::selection {
    background-color: var(--selection-bg);
    color: var(--selection-color);
}

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

a:hover {
    color: var(--link-hover);
}

a:visited {
    color: var(--link-visited);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0;
    color: var(--title-color);
    font-family: var(--font-heading);
    line-height: var(--lh-heading);
    font-weight: 600;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p {
    margin: 0 0 1.2em;
}

ul, ol {
    padding-left: 1.5em;
    margin: 0 0 1.2em;
}

blockquote {
    margin: 1.5em 0;
    padding: 0.8em 1.2em;
    border-left: 3px solid var(--blockquote-border);
    background-color: var(--blockquote-bg);
    color: var(--meta-color);
    font-style: italic;
}

blockquote p:last-child {
    margin-bottom: 0;
}

code {
    font-family: var(--font-mono);
    font-size: var(--fs-code);
    background-color: var(--code-bg);
    padding: 0.15em 0.4em;
    border-radius: 3px;
}

pre {
    background-color: var(--code-bg);
    padding: 1em;
    border-radius: 4px;
    overflow-x: auto;
    line-height: 1.5;
}

pre code {
    background: none;
    padding: 0;
    border-radius: 0;
}

hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2em 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5em 0;
}

th, td {
    border: 1px solid var(--border-color);
    padding: 0.6em 0.8em;
    text-align: left;
}

th {
    background-color: var(--bg-secondary);
    font-weight: 600;
}


/* ============================================
   Layout — 布局系统
   ============================================ */

.site-container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--content-padding);
}


/* ============================================
   Header — 页头
   ============================================ */

.site-header {
    padding: 56px 0 24px;
    text-align: center;
}

.site-title {
    font-size: var(--fs-site-title);
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.02em;
    color: var(--title-color);
}

.site-title a {
    color: var(--title-color);
    transition: color var(--transition-fast);
}

.site-title a:hover {
    color: var(--link-color);
}

.site-description {
    color: var(--meta-color);
    font-size: var(--fs-meta);
    margin: 10px 0 0;
    font-weight: 400;
}


/* ============================================
   Navigation — 导航
   ============================================ */

.site-nav {
    text-align: center;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--section-gap);
}

.site-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 32px;
}

.site-nav li {
    margin: 0;
    padding: 0;
}

.site-nav a {
    color: var(--meta-color);
    font-size: var(--fs-meta);
    font-weight: 500;
    transition: color var(--transition-fast);
    padding: 4px 0;
}

.site-nav a:hover,
.site-nav .current-menu-item a,
.site-nav .current_page_item a {
    color: var(--title-color);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
}


/* ============================================
   Post List — 文章列表
   ============================================ */

.post-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.post-item {
    margin-bottom: var(--post-gap);
    padding-bottom: var(--post-gap);
    border-bottom: 1px solid var(--border-color);
    transition: border-color var(--transition-fast);
}

.post-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.post-title {
    font-size: var(--fs-post-title);
    font-weight: 600;
    margin: 0 0 10px;
    line-height: 1.5;
    letter-spacing: -0.01em;
}

.post-title a {
    color: var(--title-color);
    transition: color var(--transition-fast);
}

.post-title a:hover {
    color: var(--link-color);
}

.post-meta {
    color: var(--meta-color);
    font-size: var(--fs-meta);
    margin: 0 0 12px;
    font-weight: 400;
}

.post-meta .sep {
    margin: 0 8px;
    opacity: 0.5;
}

.post-excerpt {
    margin: 0;
    line-height: var(--lh-body);
    color: var(--text-color);
}

.post-excerpt p:last-child {
    margin-bottom: 0;
}


/* ============================================
   Post Single — 文章详情
   ============================================ */

.single-post .site-main {
    padding-bottom: 40px;
}

.single-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 0 12px;
    line-height: 1.4;
}

.single-meta {
    color: var(--meta-color);
    font-size: var(--fs-meta);
    margin: 0 0 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.single-meta .sep {
    margin: 0 6px;
}

.single-content {
    line-height: var(--lh-body);
}

.single-content h2 {
    margin-top: 2em;
    margin-bottom: 0.8em;
}

.single-content h3 {
    margin-top: 1.5em;
    margin-bottom: 0.6em;
}

.single-content img {
    border-radius: 4px;
    margin: 1.5em 0;
}

.single-content a {
    text-decoration: underline;
    text-underline-offset: 2px;
}

.single-content a:hover {
    text-decoration: none;
}

/* 文章标签 */
.post-tags {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.post-tags a {
    display: inline-block;
    padding: 3px 10px;
    margin: 0 6px 6px 0;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    font-size: var(--fs-small);
    color: var(--meta-color);
    transition: var(--transition-color);
}

.post-tags a:hover {
    color: var(--link-color);
    border-color: var(--link-color);
}

/* 上下篇导航 */
.post-nav {
    display: flex;
    justify-content: space-between;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
    font-size: var(--fs-meta);
}

.post-nav a {
    color: var(--link-color);
    max-width: 45%;
}

.post-nav .next {
    text-align: right;
    margin-left: auto;
}


/* ============================================
   Comments — 评论
   ============================================ */

.comments-area {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.comments-title {
    font-size: 1.125rem;
    margin-bottom: 20px;
}

.comment-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.comment {
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

.comment:last-child {
    border-bottom: none;
}

.comment-author {
    font-weight: 600;
    font-size: var(--fs-meta);
}

.comment-content {
    margin-top: 8px;
    font-size: var(--fs-body);
    line-height: var(--lh-body);
}

.comment-meta {
    color: var(--meta-color);
    font-size: var(--fs-small);
    margin-top: 4px;
}

.comment-respond {
    margin-top: 30px;
}

.comment-form input,
.comment-form textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    font-size: var(--fs-body);
    transition: border-color 0.2s ease;
}

.comment-form input:focus,
.comment-form textarea:focus {
    outline: none;
    border-color: var(--link-color);
}

.comment-form textarea {
    min-height: 120px;
    resize: vertical;
}

.comment-form .form-submit {
    margin-top: 12px;
}

.comment-form .submit {
    padding: 8px 24px;
    background-color: var(--link-color);
    color: #FFFFFF;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-size: var(--fs-meta);
    transition: background-color 0.2s ease;
}

.comment-form .submit:hover {
    background-color: var(--link-hover);
}

/* 评论表单「记住信息」复选框 */
.comment-form-cookies-consent {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: var(--fs-small);
    color: var(--meta-color);
    line-height: 1.5;
    margin-top: 8px;
}

.comment-form-cookies-consent input[type="checkbox"] {
    width: auto;
    height: auto;
    margin: 0;
    padding: 0;
    border: none;
    background: none;
    flex-shrink: 0;
    vertical-align: middle;
}


/* ============================================
   Pagination — 分页
   ============================================ */

.pagination {
    text-align: center;
    padding: 36px 0;
    font-size: var(--fs-meta);
}

.pagination a,
.pagination span {
    display: inline-block;
    padding: 8px 16px;
    margin: 0 4px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-color);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.pagination a:hover {
    border-color: var(--link-color);
    color: var(--link-color);
    background-color: var(--bg-secondary);
}

.pagination .current {
    background-color: var(--link-color);
    color: #FFFFFF;
    border-color: var(--link-color);
}


/* ============================================
   Footer — 页脚
   ============================================ */

.site-footer {
    padding: 30px 0 40px;
    border-top: 1px solid var(--border-color);
    margin-top: var(--section-gap);
    text-align: center;
}

/* 底部切换器 */
.theme-switcher {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-bottom: 16px;
    font-size: var(--fs-small);
    color: var(--meta-color);
}

.switcher-group {
    display: flex;
    align-items: center;
    gap: 6px;
}

.switcher-group .label {
    color: var(--meta-color);
}

.switcher-btn {
    background: none;
    border: none;
    color: var(--meta-color);
    cursor: pointer;
    padding: 2px 6px;
    font-size: var(--fs-small);
    font-family: var(--font-body);
    transition: color 0.2s ease;
    border-radius: 2px;
}

.switcher-btn:hover {
    color: var(--link-color);
}

.switcher-btn.active {
    color: var(--link-color);
    font-weight: 600;
}

.switcher-sep {
    color: var(--border-color);
    margin: 0 2px;
}

.site-credit {
    color: var(--meta-color);
    font-size: var(--fs-small);
    margin-top: 8px;
}

.site-credit a {
    color: var(--meta-color);
}

.site-credit a:hover {
    color: var(--link-color);
}


/* ============================================
   404 Page
   ============================================ */

.error-404 {
    text-align: center;
    padding: 60px 0;
}

.error-404 h1 {
    font-size: 6rem;
    margin-bottom: 10px;
    color: var(--border-color);
}

.error-404 p {
    color: var(--meta-color);
    font-size: var(--fs-meta);
}


/* ============================================
   Search — 搜索
   ============================================ */

.search-form {
    display: flex;
    margin: 20px 0;
}

.search-form .search-field {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-right: none;
    border-radius: 3px 0 0 3px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-body);
    font-size: var(--fs-body);
}

.search-form .search-field:focus {
    outline: none;
    border-color: var(--link-color);
}

.search-form .search-submit {
    padding: 8px 16px;
    background-color: var(--link-color);
    color: #FFFFFF;
    border: 1px solid var(--link-color);
    border-radius: 0 3px 3px 0;
    cursor: pointer;
    font-size: var(--fs-meta);
    transition: background-color 0.2s ease;
}

.search-form .search-submit:hover {
    background-color: var(--link-hover);
}


/* ============================================
   Skip Link — 无障碍跳转链接
   ============================================ */

.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    background: var(--link-color);
    color: #FFFFFF;
    padding: 8px 16px;
    z-index: 1000;
    font-size: var(--fs-meta);
    border-radius: 0 0 4px 0;
}

.skip-link:focus {
    top: 0;
}


/* ============================================
   Screen Reader Text
   ============================================ */

.screen-reader-text {
    border: 0;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
    word-wrap: normal !important;
}

.screen-reader-text:focus {
    background-color: var(--bg-secondary);
    clip: auto !important;
    clip-path: none;
    color: var(--link-color);
    display: block;
    font-size: var(--fs-meta);
    height: auto;
    left: 5px;
    line-height: normal;
    padding: 15px 23px 14px;
    text-decoration: none;
    top: 5px;
    width: auto;
    z-index: 100000;
}


/* ============================================
   Editor Style — 编辑器适配
   ============================================ */

.editor-styles-wrapper {
    font-family: var(--font-body);
    color: var(--text-color);
}


/* ============================================
   Page Loading Animation — 页面加载动画
   ============================================ */

body.is-loading * {
    transition: none !important;
}

body.is-loading .site-header,
body.is-loading .site-nav,
body.is-loading .post-item,
body.is-loading .site-footer,
body.is-loading .pagination {
    opacity: 0;
    transform: translateY(20px);
}

.site-header,
.site-nav,
.post-item,
.site-footer,
.pagination {
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}


/* ============================================
   Scroll Animation — 滚动淡入动画
   ============================================ */

.post-item {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out, border-color 0.15s ease;
}

.post-item.is-visible {
    opacity: 1;
    transform: translateY(0);
}


/* ============================================
   Responsive — 响应式
   ============================================ */

@media (max-width: 767px) {
    :root {
        --content-padding: 20px;
        --section-gap: 30px;
        --post-gap: 24px;
        --fs-site-title: 20px;
        --fs-post-title: 18px;
        --fs-body: 15px;
    }

    .site-header {
        padding: 40px 0 16px;
    }

    .site-nav ul {
        flex-direction: row;
        gap: 24px;
    }

    .menu-toggle {
        display: none !important;
    }

    .post-nav {
        flex-direction: column;
        gap: 10px;
    }

    .post-nav .next {
        text-align: left;
    }

    .theme-switcher {
        flex-direction: column;
        gap: 10px;
    }
}

@media (min-width: 768px) {
    .menu-toggle {
        display: none !important;
    }
}