/* ==========================================================================
   WebStack-Hugo Theme for TwoNav Cloud
   Based on OneNav / WebStack-Hugo design from two.lm21.top
   ========================================================================== */

/* ----- Variables ----- */
:root {
  --theme: #f1404b;
  --theme-light: rgba(241,64,75,0.08);
  --theme-hover: #d9343e;
  --bg: #f5f6f8;
  --bg-card: #ffffff;
  --sidebar-bg: #f0f2f4;
  --sidebar-text: #515C6B;
  --sidebar-active-bg: rgba(241,64,75,0.10);
  --text: #333;
  --text-light: #555;
  --text-muted: #888;
  --border: #e8e8e8;
  --border-light: rgba(129,129,129,0.15);
  --shadow: 0px 0px 20px -5px rgba(158,158,158,0.2);
  --shadow-hover: 0 26px 40px -24px rgba(0,36,100,0.3);
  --radius: 8px;
  --radius-sm: 4px;
  --sidebar-width: 220px;
  --sidebar-mini: 60px;
  --header-height: 74px;
}

/* ----- Reset & Base ----- */
*, *::before, *::after { box-sizing: border-box; }
html { height: 100%; }
body {
  width: 100%;
  min-height: 100vh;
  margin: 0;
  padding: 0;
  border: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro SC", "SF Pro Text", "SF Pro Icons",
    PingFang SC, Lantinghei SC, Microsoft Yahei, Hiragino Sans GB,
    Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif;
  -moz-osx-font-smoothing: grayscale;
  -webkit-font-smoothing: antialiased;
  color: var(--text);
  background: var(--bg);
  word-wrap: break-word;
  transition: background-color 0.3s;
}
a {
  color: var(--text);
  outline: 0 !important;
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: var(--theme); text-decoration: none; }
p { color: #1d232b; margin: 0; white-space: normal; word-break: break-all; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img { max-width: 100%; height: auto; }
.sticky {
  position: -webkit-sticky;
  position: sticky;
  top: 0;
  z-index: 1080;
}

/* ========================================================================
   Layout – Page Container
   ======================================================================== */
.page-container {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: horizontal;
  -webkit-box-direction: normal;
  -ms-flex-direction: row;
  flex-direction: row;
}
.page-container > .flex-fill { min-width: 0; }
.main-content {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
}
.content-site {
  padding: 0 15px;
  margin-top: 10px;
  width: 100%;
  margin-right: auto;
  margin-left: auto;
}
@media (min-width: 1920px) { .content-site { max-width: 1900px; } }
@media (min-width: 768px) { .content-site { padding: 0 30px; } }

/* ========================================================================
   Sidebar
   ======================================================================== */
.sidebar-nav {
  position: fixed;
  display: block;
  font-size: 0.875rem;
  width: var(--sidebar-mini);
  height: 100vh;
  z-index: 1081;
  opacity: 1 !important;
  overflow: hidden;
  transition: width 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.sidebar-nav:hover {
  width: var(--sidebar-width);
}
.sidebar-nav-inner {
  width: var(--sidebar-width);
  height: 100%;
  margin: 0;
  background: var(--sidebar-bg);
  pointer-events: inherit;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  transition: background-color 0.3s;
  border-right: 1px solid var(--border);
}

/* Sidebar Logo */
.sidebar-logo {
  height: var(--header-height);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  transition: background-color 0.2s;
  border-bottom: 1px solid var(--border-light);
  flex-shrink: 0;
}
.sidebar-logo .logo { line-height: var(--header-height); width: 100%; text-align: center; }
.sidebar-logo .logo .logo-collapsed { display: none; }
.sidebar-logo img { max-height: 40px; }
.logo-text { font-size: 1.1rem; font-weight: 700; color: var(--text); white-space: nowrap; }
.logo-icon-sm { font-size: 1.5rem; }

/* When sidebar is collapsed (mini) show only collapsed logo */
.sidebar-nav .logo .logo-expanded { display: block; }
.sidebar-nav .logo .logo-collapsed { display: none; }
.sidebar-nav:not(:hover) .logo .logo-expanded { display: none; }
.sidebar-nav:not(:hover) .logo .logo-collapsed { display: block; }

/* Sidebar Menu */
.sidebar-menu {
  -webkit-box-flex: 1;
  -ms-flex: 1;
  flex: 1;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  transition: all 0.3s;
}
.sidebar-scroll {
  overflow-y: auto;
  overflow-x: hidden;
  height: 100%;
}
.sidebar-menu-inner ul { margin: 0; padding: 0; }

/* ---- Sidebar Menu Items (.nav-tab rendered by app.js) ---- */
.nav-tab {
  display: block;
  padding: 0 1.125rem;
  line-height: 46px;
  height: auto;
  max-height: 46px;
  color: var(--sidebar-text);
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  border-left: 3px solid transparent;
  font-size: 0.875rem;
}
.nav-tab:hover {
  color: var(--theme);
  background: var(--sidebar-active-bg);
  border-left-color: var(--theme);
}
.nav-tab.active {
  color: var(--theme);
  background: var(--sidebar-active-bg);
  border-left-color: var(--theme);
  font-weight: 600;
}
.nav-tab i {
  margin-right: 10px;
  width: 20px;
  text-align: center;
  font-size: 1rem;
}
/* Icon styling for sidebar items */
.nav-tab i.fa-lg { font-size: 1.1rem; }

/* Sidebar bottom items */
.sidebar-nav .flex-bottom a,
.sidebar-item a {
  display: block;
  overflow: hidden;
  padding-left: 1.125rem;
  line-height: 40px;
  max-height: 40px;
  color: var(--sidebar-text);
  transition: all 0.2s;
  white-space: nowrap;
}
.sidebar-item a:hover {
  color: var(--theme);
  background: var(--sidebar-active-bg);
}
.sidebar-item a i.fa-lg { font-size: 1.1rem; }
.sidebar-item a i {
  margin-right: 10px;
  width: 20px;
  text-align: center;
}
/* Hide text when sidebar is collapsed — .nav-tab text nodes are hidden via font-size */
.sidebar-nav:not(:hover) .nav-tab { font-size: 0; }
.sidebar-nav:not(:hover) .nav-tab i { font-size: 1rem; }
.sidebar-nav:not(:hover) .sidebar-item a span { display: none; }
.sidebar-nav:not(:hover) .nav-tab::after { content: attr(data-short); }
.sidebar-nav .border-top { border-top: 1px solid var(--border-light) !important; }
.sidebar-nav .py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.border-color { border-color: var(--border-light) !important; }
.sidebar-nav .flex-bottom { flex-shrink: 0; }

/* Hide sidebar on mobile by default */
@media (max-width: 767.98px) {
  .sidebar-nav {
    width: 100% !important;
    height: 100% !important;
    top: 0 !important;
    position: fixed;
    z-index: 1090 !important;
    display: none;
    padding-left: 0 !important;
  }
  .sidebar-nav.show {
    display: block;
  }
  .sidebar-nav > div {
    position: fixed;
    height: 100%;
    transition: 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
    transform: translate3d(-100%, 0, 0);
    width: 17.5rem;
  }
  .sidebar-nav.show > div { transform: translate3d(0, 0, 0); }
}

/* Desktop sidebar spacing */
@media (min-width: 768px) {
  .sidebar-nav { display: block !important; }
  .main-content { margin-left: var(--sidebar-mini); }
  .page-header { left: var(--sidebar-mini); }
  .sidebar-nav.animate-nav + .main-content { transition: 0.2s; }
  .sidebar-nav.animate-nav + .main-content .page-header {
    transition: left 0.2s, color 0.3s, background-color 0.3s;
  }
}

/* ========================================================================
   Page Header / Navbar
   ======================================================================== */
#header {
  position: fixed;
  right: 0;
  left: 0;
  background: #fff;
  box-shadow: 0px 0px 25px 5px rgba(10,10,10,0.05);
  transition: background-color 0.3s;
  z-index: 1079;
}
.page-header ul { margin: 0; padding: 0; }
.page-header .navbar {
  padding: 0 1rem;
  height: var(--header-height);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}
.navbar-menu {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: horizontal;
  -webkit-box-direction: normal;
  -ms-flex-direction: row;
  flex-direction: row;
  margin-left: auto;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}
.navbar-menu a { color: #777; }
.navbar-menu a:hover { color: var(--theme); }
.navbar-nav {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: horizontal;
  -webkit-box-direction: normal;
  -ms-flex-direction: row;
  flex-direction: row;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}
.navbar-nav li { list-style: none; }
.navbar-nav li > a {
  padding: 10px 15px;
  display: block;
  transition: color 0.2s;
  color: #555;
  font-size: 0.875rem;
}
.navbar-nav li > a:hover { color: var(--theme); }
.navbar-nav li > a i { margin-right: 4px; }
.navbar-brand { display: none; }
.navbar-brand .logo-text { font-size: 1rem; }

/* Header Mini Button (sidebar toggle) */
.header-mini-btn { height: var(--header-height); width: 40px; display: -webkit-box; display: -ms-flexbox; display: flex; -webkit-box-align: center; -ms-flex-align: center; align-items: center; }
.header-mini-btn svg { margin: 0 -20px; height: var(--header-height); }
.header-mini-btn input[type="checkbox"] { display: none; }
.header-mini-btn path {
  fill: none; stroke: #888; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round;
  --length: 24; --offset: -38;
  stroke-dasharray: var(--length) var(--total-length);
  stroke-dashoffset: var(--offset);
  transition: all 0.8s cubic-bezier(0.645, 0.045, 0.355, 1);
}
.header-mini-btn label { display: block; cursor: pointer; }
.header-mini-btn label:hover path { stroke: var(--theme); }
.header-mini-btn input:checked + svg .line--1,
.header-mini-btn input:checked + svg .line--3 { --length: 12.602325267; }
.header-mini-btn .line--1, .header-mini-btn .line--3 { --total-length: 126.38166809082031; }
.header-mini-btn .line--2 { --total-length: 80; }

/* Search icon */
.nav-search a { font-size: 1.25rem; color: #888; }
.nav-search a:hover { color: var(--theme); }
.icon-2x { font-size: 1.3em; }

/* Mobile menu icon */
.mobile-menu a { font-size: 1.2rem; }

/* Placeholder for fixed header */
.placeholder { height: var(--header-height); }

/* ========================================================================
   Search Banner Area
   ======================================================================== */
.header-big {
  position: relative;
  padding: 30px 15px 20px;
  text-align: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.s-search {
  max-width: 640px;
  margin: 0 auto;
}

/* Search engine type tabs */
.search-type { margin-bottom: 8px; }
.hide-type-list { border: none; }
.s-type { text-align: center; }
.s-type-list {
  display: -webkit-inline-box;
  display: -ms-inline-flexbox;
  display: inline-flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: 6px;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}

/* app.js renders .search-tab elements — style them as search engine pills */
.search-tab {
  display: inline-block;
  padding: 4px 16px;
  font-size: 0.8125rem;
  border-radius: 20px;
  cursor: pointer;
  color: rgba(255,255,255,0.75);
  background: rgba(255,255,255,0.15);
  transition: all 0.2s;
  -webkit-user-select: none;
  user-select: none;
  border: 1px solid transparent;
}
.search-tab:hover,
.search-tab.active {
  color: #fff;
  background: rgba(255,255,255,0.25);
  border-color: rgba(255,255,255,0.4);
}
.search-tab span { display: inline; vertical-align: middle; }

/* Search form */
.s-search .input-group {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  width: 100%;
  background: #fff;
  border-radius: 30px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}
.s-search .form-control {
  -webkit-box-flex: 1;
  -ms-flex: 1;
  flex: 1;
  border: none;
  padding: 12px 20px;
  font-size: 0.9375rem;
  outline: none;
  background: transparent;
  color: var(--text);
}
.s-search .form-control::-webkit-input-placeholder { color: #aaa; }
.s-search .form-control::-moz-placeholder { color: #aaa; }
.s-search .form-control:-ms-input-placeholder { color: #aaa; }
.s-search .btn-search {
  border: none;
  background: var(--theme);
  color: #fff;
  padding: 10px 24px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.2s;
  border-radius: 0;
  height: 100%;
}
.s-search .btn-search:hover { background: var(--theme-hover); }
.input-group-append { display: -webkit-box; display: -ms-flexbox; display: flex; }

/* ========================================================================
   Ad Banners
   ======================================================================== */
.ad-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
  margin-bottom: 15px;
}
.ad-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 10px 14px;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-light);
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow);
  border: 1px solid transparent;
}
.ad-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border);
}
.ad-card i { font-size: 1.1rem; color: var(--theme); margin-right: 4px; }

/* ========================================================================
   Category Content (rendered by app.js)
   ======================================================================== */
.category-content { display: none; }
.category-content.active { display: block; }

/* Category Header */
.category-header {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  padding: 16px 0 10px;
}
.category-header i {
  font-size: 1.25rem;
  color: var(--theme);
  width: 36px;
  height: 36px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  background: var(--theme-light);
  border-radius: 10px;
}
.category-header h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  color: var(--text);
}

/* Subcategory Tabs */
.subcategory-tabs {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.subcategory-tab {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.8125rem;
  cursor: pointer;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text-light);
  transition: all 0.2s;
}
.subcategory-tab:hover { color: var(--theme); border-color: var(--theme); }
.subcategory-tab.active {
  background: var(--theme);
  color: #fff;
  border-color: var(--theme);
}
.subcategory-tab i { margin-right: 4px; }

/* ========================================================================
   Links Grid & Card (WebStack-Hugo style)
   ======================================================================== */
.links-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 24px;
}
/* Responsive card grid: 4→3→2→1 columns */
@media (min-width: 1400px) { .links-grid { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 992px) and (max-width: 1399.98px) { .links-grid { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 576px) and (max-width: 991.98px) { .links-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 575.98px) { .links-grid { grid-template-columns: 1fr; } }

/* ---- Link Card (styled as WebStack-Hugo card-app) ---- */
.link-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 0.938rem;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
  position: relative;
  border: 1px solid transparent;
  min-height: 72px;
}
.link-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

/* Link icon (styled as .media-content) */
.link-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  -webkit-box-flex: 0;
  -ms-flex: none;
  flex: none;
  background: linear-gradient(135deg, #667eea, #764ba2);
  overflow: hidden;
}

/* Link info */
.link-info {
  -webkit-box-flex: 1;
  -ms-flex: 1;
  flex: 1;
  min-width: 0;
  overflow: hidden;
  padding-right: 5px;
}
.link-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-bottom: 2px;
  line-height: 1.3;
}
.link-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.4;
}

/* ========================================================================
   Articles Section
   ======================================================================== */
.card-article {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 20px;
  overflow: hidden;
}
.card-article .card-header {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}
.card-article .card-header h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: 8px;
}
.card-article .card-header h3 i { color: var(--theme); }
.card-article .card-body { padding: 10px 20px; }

/* Article items */
.articles-list { display: -webkit-box; display: -ms-flexbox; display: flex; -webkit-box-orient: vertical; -webkit-box-direction: normal; -ms-flex-direction: column; flex-direction: column; }
.article-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}
.article-item:last-child { border-bottom: none; }
.article-item a {
  color: var(--text);
  font-size: 0.875rem;
  -webkit-box-flex: 1;
  -ms-flex: 1;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.article-item a:hover { color: var(--theme); }
.article-date {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-left: 12px;
  white-space: nowrap;
}

/* ========================================================================
   Footer
   ======================================================================== */
.main-footer {
  padding: 20px 30px;
  margin-top: 20px;
  background: #23282d;
  color: #999;
  text-align: center;
  font-size: 0.8125rem;
}
.main-footer a { color: #ccc; }
.main-footer a:hover { color: #fff; }
.main-footer .footer-text { margin-bottom: 4px; }
.main-footer .footer-links { margin-top: 4px; }

/* ========================================================================
   Context Menu (Right Click)
   ======================================================================== */
.context-menu {
  display: none;
  position: fixed;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
  padding: 6px 0;
  min-width: 160px;
  z-index: 9999;
  border: 1px solid var(--border);
}
.context-menu.show { display: block; }
.context-menu-item {
  padding: 8px 16px;
  font-size: 0.8125rem;
  cursor: pointer;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: 8px;
  transition: background 0.15s;
}
.context-menu-item:hover { background: var(--bg); color: var(--theme); }
.context-menu-divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

/* ========================================================================
   Toast
   ======================================================================== */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.8);
  color: #fff;
  padding: 10px 24px;
  border-radius: 20px;
  font-size: 0.875rem;
  z-index: 99999;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.toast.show { opacity: 1; }

/* ========================================================================
   Admin Page Styles (shared with admin.html)
   ======================================================================== */
.admin-page { background: #f0f2f5; }

/* Login Screen */
.login-screen {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.login-card {
  background: #fff;
  border-radius: 16px;
  padding: 36px;
  width: 380px;
  max-width: 90vw;
  box-shadow: 0 8px 40px rgba(0,0,0,0.15);
}
.login-header { text-align: center; margin-bottom: 28px; }
.login-header i { font-size: 2.5rem; color: var(--theme, #409eff); margin-bottom: 12px; }
.login-header h2 { font-size: 1.375rem; font-weight: 600; margin: 0; }
.login-header p { font-size: 0.8125rem; color: #999; margin-top: 6px; }

/* Form elements */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.8125rem; margin-bottom: 6px; color: #666; }
.form-input, .form-select {
  width: 100%;
  padding: 10px 14px;
  border: 2px solid var(--border, #e8e8e8);
  border-radius: 6px;
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s;
  background: #fff;
}
.form-input:focus, .form-select:focus { border-color: var(--theme, #409eff); }

/* Buttons */
.btn {
  padding: 10px 24px;
  border: none;
  border-radius: 6px;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
  display: -webkit-inline-box;
  display: -ms-inline-flexbox;
  display: inline-flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  gap: 6px;
  line-height: 1.4;
}
.btn-primary { background: var(--theme, #409eff); color: #fff; }
.btn-primary:hover { background: #337ecc; }
.btn-danger { background: #f56c6c; color: #fff; }
.btn-danger:hover { background: #e04040; }
.btn-sm { padding: 6px 14px; font-size: 0.75rem; }
.btn-block { width: 100%; -webkit-box-pack: center; -ms-flex-pack: center; justify-content: center; padding: 12px; }
.btn-warning { background: #e6a23c; color: #fff; }
.btn-warning:hover { background: #d48a1e; }

.login-error { color: #f56c6c; font-size: 0.8125rem; margin-top: 10px; text-align: center; }
.register-link { text-align: center; margin-top: 16px; font-size: 0.8125rem; color: #999; }

/* Admin Panel */
.admin-panel { display: block; }
.admin-topbar {
  background: #23282d;
  color: #fff;
  padding: 12px 0;
}
.admin-topbar-content {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}
.admin-topbar-content h3 { font-size: 1rem; margin: 0; }
.admin-topbar-actions { display: -webkit-box; display: -ms-flexbox; display: flex; gap: 8px; }
.admin-topbar-actions .btn { background: rgba(255,255,255,0.15); color: #fff; }
.admin-topbar-actions .btn:hover { background: rgba(255,255,255,0.25); }

.admin-tabs {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  gap: 4px;
  margin: 20px 0;
  border-bottom: 2px solid var(--border, #e8e8e8);
  padding-bottom: 0;
}
.admin-tab {
  padding: 10px 20px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-size: 0.875rem;
  cursor: pointer;
  color: #666;
  transition: all 0.2s;
}
.admin-tab:hover { color: var(--theme, #409eff); }
.admin-tab.active { color: var(--theme, #409eff); border-bottom-color: var(--theme, #409eff); font-weight: 600; }
.admin-tab-content { display: none; }
.admin-tab-content.active { display: block; }

.admin-toolbar {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
}
.admin-search { -webkit-box-flex: 1; -ms-flex: 1; flex: 1; min-width: 200px; }
.admin-search input { width: 100%; padding: 8px 12px; border: 1px solid var(--border, #e8e8e8); border-radius: 6px; font-size: 0.8125rem; }

.admin-table-wrapper {
  overflow-x: auto;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}
.admin-table th {
  background: var(--bg, #f4f5f7);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
  color: #666;
  border-bottom: 2px solid var(--border, #e8e8e8);
}
.admin-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border, #e8e8e8);
}
.admin-table tr:hover td { background: #f8f9fb; }
.admin-table .actions { display: -webkit-box; display: -ms-flexbox; display: flex; gap: 6px; }
.admin-table .actions .btn { padding: 4px 10px; font-size: 0.75rem; }

.admin-pagination {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  gap: 6px;
  margin-top: 16px;
}
.page-btn {
  padding: 6px 12px;
  border: 1px solid var(--border, #e8e8e8);
  border-radius: 4px;
  background: #fff;
  cursor: pointer;
  font-size: 0.8125rem;
}
.page-btn.active { background: var(--theme, #409eff); color: #fff; border-color: var(--theme, #409eff); }
.page-btn:hover:not(.active) { border-color: var(--theme, #409eff); color: var(--theme, #409eff); }

/* Category list in admin */
.category-list-admin { display: -webkit-box; display: -ms-flexbox; display: flex; -webkit-box-orient: vertical; -webkit-box-direction: normal; -ms-flex-direction: column; flex-direction: column; gap: 8px; }
.category-admin-item {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  background: #fff;
  padding: 12px 16px;
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
}
.category-admin-item .cat-info { display: -webkit-box; display: -ms-flexbox; display: flex; -webkit-box-align: center; -ms-flex-align: center; align-items: center; gap: 10px; }
.category-admin-item .cat-info i { color: var(--theme, #409eff); }
.category-admin-item .cat-actions { display: -webkit-box; display: -ms-flexbox; display: flex; gap: 6px; }

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  z-index: 10000;
}
.modal {
  background: #fff;
  border-radius: var(--radius, 10px);
  width: 500px;
  max-width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 8px 40px rgba(0,0,0,0.2);
}
.modal-header {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
  -ms-flex-pack: justify;
  justify-content: space-between;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border, #e8e8e8);
}
.modal-header h3 { font-size: 1rem; margin: 0; }
.modal-close { background: none; border: none; font-size: 1.5rem; cursor: pointer; color: #999; }
.modal-body { padding: 20px; }
.modal-footer {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: end;
  -ms-flex-pack: end;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--border, #e8e8e8);
}

/* Admin responsive */
@media (max-width: 768px) {
  .admin-toolbar { -webkit-box-orient: vertical; -webkit-box-direction: normal; -ms-flex-direction: column; flex-direction: column; }
  .admin-search { width: 100%; }
  .login-card { padding: 24px; max-width: 95vw; }
}

/* ========================================================================
   Loading & Empty State
   ======================================================================== */
.loading {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
}
.loading i { font-size: 2rem; -webkit-animation: spin 1s linear infinite; animation: spin 1s linear infinite; }
@-webkit-keyframes spin { 100% { -webkit-transform: rotate(360deg); transform: rotate(360deg); } }
@keyframes spin { 100% { -webkit-transform: rotate(360deg); transform: rotate(360deg); } }

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}
.empty-state i { font-size: 2.5rem; margin-bottom: 12px; display: block; }
.empty-state p { font-size: 0.875rem; color: var(--text-muted); }

/* ========================================================================
   Utility Classes
   ======================================================================== */
.d-none { display: none !important; }
.d-md-none { display: none; }
.d-md-block { display: block; }
.text-xs { font-size: 0.75rem !important; }
.text-sm { font-size: 0.875rem !important; }
.text-muted { color: var(--text-muted); }
.ml-3 { margin-left: 1rem; }
.mr-3 { margin-right: 1rem; }
.mr-lg-0 { margin-right: 0; }
.ml-md-4 { margin-left: 1.5rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.px-0 { padding-left: 0; padding-right: 0; }
.mb-4 { margin-bottom: 1.5rem; }
.border-bottom { border-bottom: 1px solid var(--border-light); }
.border-top { border-top: 1px solid var(--border-light); }
.overflow-hidden { overflow: hidden; }
.container-fluid { width: 100%; padding-right: 15px; padding-left: 15px; margin-right: auto; margin-left: auto; }
.order-1 { -webkit-box-ordinal-group: 2; -ms-flex-order: 1; order: 1; }
.order-2 { -webkit-box-ordinal-group: 3; -ms-flex-order: 2; order: 2; }
.navbar-collapse {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-flex: 1;
  -ms-flex: 1;
  flex: 1;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}

/* ========================================================================
   Responsive Breakpoints
   ======================================================================== */

/* Tablet & below */
@media (max-width: 991.98px) {
  .d-lg-none { display: none !important; }
  .d-lg-block { display: block; }
}

/* Mobile */
@media (max-width: 767.98px) {
  .d-md-none { display: block !important; }
  .d-md-block { display: none !important; }
  .main-content { margin-left: 0; }
  .page-header { left: 0; }
  .placeholder { height: 60px; }
  .page-header .navbar { padding: 0 0.75rem; height: 60px; }
  .navbar-brand.d-md-none { display: block !important; }

  .header-big { padding: 20px 12px 16px; }
  .s-search .form-control { padding: 10px 16px; font-size: 0.875rem; }
  .s-search .input-group { border-radius: 24px; }
  .search-tab { padding: 3px 12px; font-size: 0.75rem; }

  .ad-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 6px; }
  .ad-card { padding: 8px 10px; font-size: 0.75rem; }

  .content-site { padding: 0 12px; }
  .links-grid { grid-template-columns: 1fr; gap: 12px; }
  .link-card { padding: 0.75rem; }
  .link-icon { width: 36px; height: 36px; font-size: 0.9375rem; }
  .link-title { font-size: 0.875rem; }
  .link-desc { font-size: 0.75rem; }

  .card-article .card-header { padding: 12px 14px; }
  .card-article .card-body { padding: 6px 14px; }
  .main-footer { padding: 14px 16px; }

  .sidebar-nav { background: transparent !important; }
  .sidebar-nav.show > div { transform: translate3d(0, 0, 0); }

  .category-header { padding: 12px 0 8px; }
  .category-header h2 { font-size: 1.1rem; }
  .subcategory-tabs { gap: 6px; margin-bottom: 14px; }
  .subcategory-tab { padding: 4px 12px; font-size: 0.75rem; }
}

/* Small mobile */
@media (max-width: 480px) {
  .header-big { padding: 16px 10px 14px; }
  .s-search .form-control { padding: 8px 14px; font-size: 0.8125rem; }
  .s-search .input-group { border-radius: 20px; }
  .s-search .btn-search { padding: 8px 18px; }
  .search-tab { padding: 2px 10px; font-size: 0.6875rem; }
  .ad-grid { grid-template-columns: repeat(2, 1fr); }
  .links-grid { gap: 10px; }
}

/* ========================================================================
   Scrollbar
   ======================================================================== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #aaa; }
::-webkit-scrollbar-track { background: transparent; }

/* ========================================================================
   IE / Edge fallback
   ======================================================================== */
@supports (-ms-ime-align: auto) {
  .sidebar-nav { width: var(--sidebar-mini); }
  .links-grid { display: -ms-grid; }
}