/* =========================================================
   Ximuiot Blog - Design System (2026 Refactor)
   =========================================================
   Color: Forest Green (#2D6A4F) + Coral (#D85A30)
   Font: Sora (display) + DM Sans (body) + JetBrains Mono (mono); CJK falls back to system
   ========================================================= */

/* ---- Local Fonts (latin subset; CJK falls back to system) ---- */
@font-face {
  font-family: 'Sora';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../fonts/sora-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'DM Sans';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('../fonts/dmsans-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 500 700;
  font-display: swap;
  src: url('../fonts/jetbrainsmono-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ---- CSS Variables ---- */
:root {
  /* Colors */
  --color-primary: #2D6A4F;
  --color-primary-dark: #1B4332;
  --color-primary-light: #95D5B2;
  --color-primary-lighter: #D8F3DC;

  --color-accent: #D85A30;
  --color-accent-light: #F0A98E;

  --color-bg-page: #f5f5f0;
  --color-bg-content: #ffffff;
  --color-bg-sidebar: #f5f7f6;
  --color-bg-nav: #1a1a2e;
  --color-bg-footer: #1a1a2e;
  --color-bg-code-header: #1e1e2e;
  --color-bg-code: #f8f9fa;

  --color-text-primary: #222222;
  --color-text-secondary: #555555;
  --color-text-muted: #888888;
  --color-text-inverse: #ffffff;

  --color-border: #e4e4e4;
  --color-border-light: #f0f0f0;

  --color-link: #239f66;
  --color-link-hover: #0A5C36;

  /* Typography */
  --font-display: 'Sora', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-sans: 'DM Sans', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei',
    'Hiragino Sans GB', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Courier New', monospace;
  --font-nav: var(--font-sans);

  /* Spacing & Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);

  --content-max-width: 1010px;
  --nav-height: 52px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* ---- Reset & Base ---- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  background: var(--color-bg-page);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.35;
  margin: 0 0 0.5em;
}
h1 { font-size: 1.75em; }
h2 { font-size: 1.5em; }
h3 { font-size: 1.25em; }
h4 { font-size: 1.1em; }
h5 { font-size: 1em; }
h6 { font-size: 0.9em; }

p {
  margin: 0 0 1em;
  line-height: 1.7;
}

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

/* ---- Layout ---- */
#main {
  width: var(--content-max-width);
  max-width: 100%;
  margin: 0 auto;
}

/* ---- Header / Logo ---- */
#header {
  background: transparent;
  padding: 0;
}

#logo {
  padding: 20px 0 10px;
}

#logo_text h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0;
  letter-spacing: -0.3px;
}
#logo_text h1 a,
#logo_text h1 a:hover,
.logo_color {
  color: var(--color-primary);
}
#logo_text h2 {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-muted);
  margin: 4px 0 0;
}

/* ---- Navigation ---- */
#menubar {
  height: var(--nav-height);
  background: var(--color-bg-nav);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
}

ul#menu {
  display: flex;
  margin: 0;
  padding: 0;
  list-style: none;
  height: 100%;
  width: 100%;
}

ul#menu li {
  margin: 0;
  padding: 0;
  list-style: none;
}

ul#menu li a {
  display: flex;
  align-items: center;
  height: var(--nav-height);
  padding: 0 28px;
  color: var(--color-text-inverse);
  font-size: 15px;
  font-weight: 500;
  font-family: var(--font-nav);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

ul#menu li:last-child a {
  border-right: none;
}

ul#menu li a:hover,
ul#menu li.selected a {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-primary-light);
  position: relative;
}
ul#menu li.selected a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 28px;
  right: 28px;
  height: 3px;
  background: var(--color-primary-light);
  border-radius: 3px 3px 0 0;
}

/* Mobile menu toggle */
#menu-toggle {
  display: none;
  background: transparent;
  color: var(--color-text-inverse);
  border: none;
  padding: 14px 16px;
  font-size: 15px;
  cursor: pointer;
  width: 100%;
  text-align: left;
  font-family: var(--font-sans);
  font-weight: 500;
}
#menu-toggle .toggle-icon {
  float: right;
  font-size: 18px;
}

/* ---- Site Content ---- */
#site_content {
  background: var(--color-bg-content);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  padding: 28px 30px;
  margin-top: 0;
  box-shadow: var(--shadow-sm);
}

/* ---- Article List / Cards ---- */
.article-card {
  background: var(--color-bg-content);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 16px;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.article-title {
  font-size: 1.35em;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 0.3em;
  line-height: 1.3;
}
.article-title a {
  color: var(--color-text-primary);
  text-decoration: none;
}
.article-title a:hover {
  color: var(--color-primary);
}

.article-meta {
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 8px 0 12px;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 12px;
}
.article-meta a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.article-meta a:hover {
  color: var(--color-primary);
}

.article-content {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-secondary);
  word-wrap: break-word;
}

/* ---- Article Detail Content ---- */
.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
  color: var(--color-text-primary);
  margin: 1.6em 0 0.6em;
}
.article-content h1 {
  font-size: 1.5em;
  border-bottom: 2px solid var(--color-border-light);
  padding-bottom: 0.3em;
}
.article-content h2 {
  font-size: 1.35em;
  border-bottom: 1px solid var(--color-border-light);
  padding-bottom: 0.25em;
}
.article-content h3 { font-size: 1.2em; }
.article-content h4 { font-size: 1.1em; }
.article-content h5 { font-size: 1em; }
.article-content h6 { font-size: 0.9em; }

.article-content img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 16px 0;
  border-radius: var(--radius-sm);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
  overflow-x: auto;
  display: block;
}
.article-content table th,
.article-content table td {
  border: 1px solid var(--color-border);
  padding: 8px 12px;
  text-align: left;
}
.article-content table th {
  background: var(--color-bg-code);
  font-weight: 600;
}
.article-content table tr:nth-child(even) {
  background: #fafafa;
}
.article-content table tr:hover {
  background: var(--color-primary-lighter);
}

/* ---- Sidebar ---- */
.sidebar {
  background: var(--color-bg-sidebar);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 16px;
  font-size: 14px;
}

.sidebar h5 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary-light);
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.sidebar ul li {
  padding: 2px 0;
  list-style: none;
}
.sidebar ul li a {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 14px;
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 2px 2px;
  margin: 0 -8px;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.sidebar ul li a:hover {
  color: var(--color-link-hover);
  background: var(--color-primary-lighter);
}

/* Sidebar toggle (mobile) */
.sidebar-toggle {
  display: none;
  width: 100%;
  background: var(--color-bg-nav);
  border: none;
  padding: 10px 14px;
  text-align: left;
  font-size: 14px;
  color: var(--color-text-inverse);
  cursor: pointer;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  font-family: var(--font-sans);
}
.sidebar-toggle:hover {
  background: #25253e;
}
.sidebar-toggle-icon {
  float: right;
}

/* Tag cloud links in sidebar */
.tag-link {
  display: inline-block;
  margin: 1px 2px;
  color: var(--color-link);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.tag-link:hover {
  color: var(--color-link-hover);
  background: var(--color-primary-lighter);
  text-decoration: none;
}
.tag-link--lg { font-size: 20px; }
.tag-link--md { font-size: 16px; }
.tag-link--sm { font-size: 13px; }

/* Spacing utilities */
.mt-20 { margin-top: 20px; }

/* ---- Footer ---- */
#footer {
  padding: 20px 0;
  text-align: center;
  color: var(--color-text-inverse);
  margin-top: 0;
  background: var(--color-bg-nav);
}
#footer .container {
  max-width: var(--content-max-width);
  margin: 0 auto;
}
#footer a {
  color: var(--color-primary-light);
}
#footer a:hover {
  color: var(--color-primary-lighter);
}
#footer p {
  font-size: 13px;
  margin: 4px 0;
  color: rgba(255, 255, 255, 0.8);
}

/* ---- Pagination ---- */
.pages {
  margin: 24px 0;
  text-align: center;
}
.pages .pagination {
  justify-content: center;
  margin: 0;
}
.pages .page-link {
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  padding: 6px 14px;
  transition: all var(--transition-fast);
}
.pages .page-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: transparent;
}
.pages .page-item.active .page-link {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* ---- Code Blocks ---- */
.code-block-wrapper {
  position: relative;
  margin: 16px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-code);
}
.code-block-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  background: var(--color-bg-code-header);
  color: var(--color-text-inverse);
  font-size: 12px;
}
.code-lang-label {
  font-weight: 600;
  color: var(--color-primary-light);
}
.copy-code-btn {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text-inverse);
  border: none;
  padding: 4px 12px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  transition: background var(--transition-fast);
}
.copy-code-btn:hover {
  background: rgba(255, 255, 255, 0.2);
}
.copy-code-btn.copied {
  background: var(--color-primary);
}
.code-block-content {
  padding: 16px;
  overflow-x: auto;
}
.code-block-content pre {
  margin: 0;
  padding: 0;
  background: transparent;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
}
.code-block-content .codehilite {
  background: transparent;
  padding: 0;
}

/* ---- Textbox (article list items) ---- */
.textbox {
  margin: 0 0 20px;
  padding: 0 0 5px;
}
.textbox-title {
  text-align: left;
  padding: 10px 0;
  line-height: 1;
}
.textbox-title h3 {
  font-size: 1.15em;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0;
}
.textbox-title h3 a {
  color: var(--color-text-primary);
  text-decoration: none;
}
.textbox-title h3 a:hover {
  color: var(--color-primary);
}
.textbox-label {
  color: var(--color-text-muted);
  font-size: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border-light);
}
.textbox-label a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.textbox-label a:hover {
  color: var(--color-primary);
}
.textbox-content {
  word-wrap: break-word;
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.6;
  padding: 12px 0;
  overflow: hidden;
}
.textbox-content img {
  max-width: 100% !important;
  height: auto !important;
  display: block;
  margin: 10px 0;
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  #main {
    width: 100%;
  }

  #logo {
    padding: 16px 0 12px;
    margin: 0 16px;
  }
  #logo_text h1 {
    font-size: 24px;
  }

  #menubar {
    height: auto;
    border-radius: 0;
    flex-wrap: wrap;
  }

  #menu-toggle {
    display: block;
  }

  ul#menu {
    display: none;
    flex-direction: column;
    width: 100%;
  }
  ul#menu.show {
    display: flex;
  }
  ul#menu li a {
    height: auto;
    padding: 12px 16px;
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  ul#menu li.selected a::after {
    left: 16px;
    right: 16px;
  }

  #site_content {
    padding: 20px;
    border-radius: 0;
  }

  .sidebar-toggle {
    display: block;
  }
  .sidebar-content {
    display: none;
  }
  .sidebar-content.show {
    display: block;
  }
}

@media (max-width: 768px) {
  #logo {
    margin: 0 12px;
  }
  #logo_text h1 {
    font-size: 20px;
  }
  #logo_text h2 {
    font-size: 13px;
  }

  #site_content {
    padding: 16px;
  }

  .article-card {
    padding: 16px;
  }
  .article-content {
    font-size: 14px;
  }

  .sidebar {
    padding: 16px;
  }

  #footer .container {
    padding: 0 16px;
  }
}

@media (max-width: 480px) {
  #logo_text h1 {
    font-size: 18px;
  }
  ul#menu li a {
    padding: 10px 14px;
    font-size: 14px;
  }
  .article-content {
    font-size: 13px;
  }
}

/* ---- Bootstrap Overrides ---- */
.btn-primary {
  --bs-btn-bg: var(--color-primary);
  --bs-btn-border-color: var(--color-primary);
  --bs-btn-hover-bg: var(--color-primary-dark);
  --bs-btn-hover-border-color: var(--color-primary-dark);
  --bs-btn-active-bg: var(--color-primary-dark);
  --bs-btn-active-border-color: var(--color-primary-dark);
  background-color: var(--color-primary) !important;
  border-color: var(--color-primary) !important;
}
.btn-primary:hover {
  background-color: var(--color-primary-dark) !important;
  border-color: var(--color-primary-dark) !important;
}

/* ---- Animation ---- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.article-card {
  animation: fadeInUp 0.4s ease both;
}
.article-card:nth-child(2) { animation-delay: 0.05s; }
.article-card:nth-child(3) { animation-delay: 0.1s; }
.article-card:nth-child(4) { animation-delay: 0.15s; }
.article-card:nth-child(5) { animation-delay: 0.2s; }
.article-card:nth-child(6) { animation-delay: 0.25s; }