/*
Theme Name: Flavor Nav
Theme URI: https://example.com/flavor-nav
Author: Flavor Studio
Author URI: https://example.com
Description: A modern, minimal and powerful WordPress navigation/directory theme with sidebar, dark mode, search, responsive grid layout and clear category hierarchy.
Version: 1.1.0
Requires at least: 5.0
Tested up to: 6.4
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: flavor-nav
Tags: navigation, directory, bookmark, dark-mode, responsive, sidebar
*/

/* ===== Reset & Base ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#6366f1;--primary-light:#818cf8;--primary-dark:#4f46e5;
  --bg:#f8fafc;--bg-card:#fff;--bg-header:#fff;--bg-sidebar:#fff;--bg-hover:#f1f5f9;--bg-input:#f1f5f9;
  --text:#1e293b;--text-secondary:#64748b;--text-muted:#94a3b8;
  --border:#e2e8f0;--shadow:0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);
  --shadow-md:0 4px 6px -1px rgba(0,0,0,.07),0 2px 4px -2px rgba(0,0,0,.05);
  --shadow-lg:0 10px 15px -3px rgba(0,0,0,.08),0 4px 6px -4px rgba(0,0,0,.05);
  --radius:12px;--radius-sm:8px;--radius-xs:6px;
  --header-h:56px;--sidebar-w:220px;--max-w:1200px;
  --transition:all .2s ease;
}
body.dark{
  --bg:#0f172a;--bg-card:#1e293b;--bg-header:#1e293b;--bg-sidebar:#1e293b;--bg-hover:#334155;--bg-input:#334155;
  --text:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;
  --border:#334155;
  --shadow:0 1px 3px rgba(0,0,0,.2);--shadow-md:0 4px 6px rgba(0,0,0,.25);--shadow-lg:0 10px 15px rgba(0,0,0,.3);
}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px)}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}

/* ===== Header ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--header-h);background:var(--bg-header);border-bottom:1px solid var(--border);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.header-inner{height:100%;display:flex;align-items:center;padding:0 20px;gap:12px}
.sidebar-toggle{width:36px;height:36px;border:none;border-radius:var(--radius-xs);background:transparent;color:var(--text-secondary);cursor:pointer;display:none;align-items:center;justify-content:center;transition:var(--transition);flex-shrink:0}
.sidebar-toggle:hover{background:var(--bg-hover);color:var(--text)}
.sidebar-toggle svg{width:20px;height:20px}
.site-logo{font-size:18px;font-weight:700;color:var(--primary);white-space:nowrap;display:flex;align-items:center;gap:8px;flex-shrink:0}
.site-logo svg{width:24px;height:24px;flex-shrink:0}
.header-search{flex:1;max-width:480px;margin:0 auto}
.search-form{position:relative}
.search-form input{width:100%;height:36px;padding:0 14px 0 36px;border:1px solid var(--border);border-radius:18px;background:var(--bg-input);color:var(--text);font-size:13px;outline:none;transition:var(--transition)}
.search-form input:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(99,102,241,.15)}
.search-form input::placeholder{color:var(--text-muted)}
.search-form .search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-muted);pointer-events:none}
.search-form .search-icon svg{width:15px;height:15px}
.header-actions{display:flex;align-items:center;gap:4px;flex-shrink:0}
.theme-toggle{width:36px;height:36px;border:none;border-radius:var(--radius-xs);background:transparent;color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition)}
.theme-toggle:hover{background:var(--bg-hover);color:var(--text)}
.theme-toggle svg{width:18px;height:18px}

/* ===== Layout ===== */
.layout-wrapper{display:flex;margin-top:var(--header-h);min-height:calc(100vh - var(--header-h))}

/* ===== Sidebar ===== */
.sidebar{position:fixed;top:var(--header-h);left:0;bottom:0;width:var(--sidebar-w);background:var(--bg-sidebar);border-right:1px solid var(--border);overflow-y:auto;overflow-x:hidden;z-index:900;transition:transform .25s ease}
.sidebar::-webkit-scrollbar{width:4px}
.sidebar::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}
.sidebar-inner{padding:16px 0}
.sidebar-label{padding:0 20px 12px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted)}
.sidebar-nav{display:flex;flex-direction:column}
.sidebar-group{border-bottom:1px solid var(--border)}
.sidebar-group:last-child{border-bottom:none}
.sidebar-link{display:flex;align-items:center;gap:10px;padding:12px 20px;font-size:14px;font-weight:600;color:var(--text);transition:var(--transition);cursor:pointer;text-decoration:none}
.sidebar-link:hover{background:var(--bg-hover)}
.sidebar-link.active{color:var(--primary);background:rgba(99,102,241,.06)}
.sidebar-icon{font-size:16px;flex-shrink:0;width:24px;text-align:center}
.sidebar-text{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sidebar-arrow{width:16px;height:16px;color:var(--text-muted);transition:transform .2s ease;flex-shrink:0}
.sidebar-arrow svg{width:16px;height:16px}
.sidebar-group.expanded .sidebar-arrow{transform:rotate(180deg)}
.sidebar-children{display:none;padding:0 0 8px;background:transparent}
.sidebar-group.expanded .sidebar-children{display:block}
.sidebar-child-link{display:flex;align-items:center;justify-content:space-between;padding:7px 20px 7px 54px;font-size:13px;color:var(--text-secondary);transition:var(--transition);text-decoration:none}
.sidebar-child-link:hover{color:var(--primary);background:var(--bg-hover)}
.sidebar-child-link.active{color:var(--primary);font-weight:500}
.sidebar-count{font-size:11px;color:var(--text-muted);background:var(--bg-input);padding:1px 6px;border-radius:8px;min-width:20px;text-align:center}
.sidebar-overlay{display:none;position:fixed;inset:0;top:var(--header-h);background:rgba(0,0,0,.4);z-index:899}

/* ===== Main Content ===== */
.main-content{flex:1;margin-left:var(--sidebar-w);padding:24px 28px 48px;max-width:calc(var(--max-w) + 56px);transition:margin .25s ease}

/* ===== Parent Section ===== */
.parent-section{margin-bottom:36px}
.parent-header{display:flex;align-items:center;gap:10px;margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid var(--primary);border-radius:0}
.parent-icon{font-size:22px}
.parent-title{font-size:18px;font-weight:700;color:var(--text)}
.parent-count{font-size:12px;color:var(--text-muted);background:var(--bg-input);padding:2px 8px;border-radius:10px}

/* ===== Child Tabs ===== */
.child-tabs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px;padding-bottom:0}
.child-tab{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border:1px solid var(--border);border-radius:20px;background:var(--bg-card);color:var(--text-secondary);font-size:13px;font-weight:500;cursor:pointer;transition:var(--transition);white-space:nowrap}
.child-tab:hover{border-color:var(--primary-light);color:var(--primary)}
.child-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.child-tab .tab-count{font-size:11px;opacity:.7}

/* ===== Child Panels ===== */
.child-panel{display:none}
.child-panel.active{display:block}

/* ===== Nav Grid ===== */
.nav-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.nav-card{display:flex;align-items:center;gap:12px;padding:14px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);transition:var(--transition);cursor:pointer;text-decoration:none}
.nav-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--primary-light)}
.card-favicon{width:40px;height:40px;border-radius:var(--radius-sm);background:var(--bg-input);display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden}
.card-favicon img{width:24px;height:24px;object-fit:contain}
.card-favicon .letter-icon{width:40px;height:40px;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:600;color:#fff}
.card-info{flex:1;min-width:0}
.card-title{font-size:14px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card-desc{font-size:12px;color:var(--text-muted);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ===== Pagination ===== */
.pagination{margin:0 auto;padding:32px 0;display:flex;justify-content:center;gap:8px}
.pagination .page-numbers{display:inline-flex;align-items:center;justify-content:center;min-width:36px;height:36px;padding:0 12px;border:1px solid var(--border);border-radius:var(--radius-xs);font-size:14px;color:var(--text-secondary);background:var(--bg-card);transition:var(--transition)}
.pagination .page-numbers:hover{border-color:var(--primary);color:var(--primary)}
.pagination .page-numbers.current{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ===== Single Post ===== */
.site-content{max-width:800px;margin:0 auto;padding:40px 0}
.site-detail-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.site-detail-header{display:flex;align-items:center;gap:16px;margin-bottom:24px}
.site-detail-favicon{width:64px;height:64px;border-radius:var(--radius);background:var(--bg-input);display:flex;align-items:center;justify-content:center;flex-shrink:0;overflow:hidden}
.site-detail-favicon img{width:40px;height:40px;object-fit:contain}
.site-detail-favicon .letter-icon{width:64px;height:64px;border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:700;color:#fff}
.site-detail-title{font-size:24px;font-weight:700}
.site-detail-url{font-size:13px;color:var(--text-muted);margin-top:4px}
.visit-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;background:var(--primary);color:#fff;border-radius:var(--radius-sm);font-size:15px;font-weight:500;transition:var(--transition);margin-bottom:24px}
.visit-btn:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-md);color:#fff}
.visit-btn svg{width:18px;height:18px}
.site-detail-body{line-height:1.8;color:var(--text-secondary)}
.site-detail-body p{margin-bottom:16px}
.site-meta{display:flex;gap:16px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border);font-size:13px;color:var(--text-muted)}
.site-meta a{color:var(--primary)}

/* ===== Page ===== */
.page-content{max-width:800px;margin:0 auto;padding:40px 0}
.page-content h1{font-size:28px;font-weight:700;margin-bottom:24px}
.page-body{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow);line-height:1.8;color:var(--text-secondary)}
.page-body p{margin-bottom:16px}

/* ===== Archive / Search ===== */
.archive-header{padding:24px 0 0}
.archive-header h1{font-size:24px;font-weight:700}
.archive-header .search-info{color:var(--text-secondary);font-size:15px}
.archive-grid{padding:24px 0}

/* ===== 404 ===== */
.error-content{text-align:center;padding:80px 24px}
.error-content h1{font-size:72px;font-weight:800;color:var(--primary);opacity:.5}
.error-content p{font-size:18px;color:var(--text-secondary);margin:16px 0 32px}
.error-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;background:var(--primary);color:#fff;border-radius:var(--radius-sm);font-size:15px;font-weight:500;transition:var(--transition)}
.error-btn:hover{background:var(--primary-dark);color:#fff}

/* ===== Footer ===== */
.site-footer{margin-left:var(--sidebar-w);padding:24px 28px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;transition:margin .25s ease}
.footer-text{font-size:13px;color:var(--text-muted)}
.footer-links{display:flex;gap:16px}
.footer-links a{font-size:13px;color:var(--text-muted);transition:var(--transition)}
.footer-links a:hover{color:var(--primary)}

/* ===== Back to Top ===== */
.back-to-top{position:fixed;bottom:24px;right:24px;width:40px;height:40px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg-card);color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:var(--transition);z-index:999;box-shadow:var(--shadow)}
.back-to-top.visible{opacity:1;visibility:visible}
.back-to-top:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.back-to-top svg{width:20px;height:20px}

/* ===== Responsive ===== */
@media(max-width:960px){
  .sidebar-toggle{display:flex}
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0);box-shadow:var(--shadow-lg)}
  .sidebar-overlay.open{display:block}
  .main-content{margin-left:0}
  .site-footer{margin-left:0}
}
@media(max-width:768px){
  .header-inner{padding:0 12px}
  .header-search{max-width:none}
  .main-content{padding:16px 14px 40px}
  .parent-header{margin-bottom:12px;padding-bottom:10px}
  .parent-title{font-size:16px}
  .child-tabs{gap:4px;margin-bottom:12px}
  .child-tab{padding:5px 10px;font-size:12px}
  .nav-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}
  .nav-card{padding:10px}
  .card-favicon{width:36px;height:36px}
  .card-favicon img{width:20px;height:20px}
  .card-favicon .letter-icon{width:36px;height:36px;font-size:16px}
  .card-title{font-size:13px}
  .site-content,.page-content{padding:24px 0}
  .site-detail-card{padding:20px}
  .site-detail-title{font-size:20px}
  .site-footer{padding:20px 14px;flex-direction:column;text-align:center}
}
@media(max-width:480px){
  .nav-grid{grid-template-columns:repeat(2,1fr);gap:8px}
  .nav-card{gap:8px;padding:10px}
  .card-favicon{width:32px;height:32px}
  .card-favicon img{width:18px;height:18px}
  .card-favicon .letter-icon{width:32px;height:32px;font-size:14px}
  .card-title{font-size:12px}
  .card-desc{display:none}
}

/* ===== Print ===== */
@media print{
  .site-header,.sidebar,.back-to-top,.theme-toggle,.site-footer,.child-tabs{display:none!important}
  body{background:#fff;color:#000}
  .main-content{margin-left:0!important}
  .nav-card{box-shadow:none;border:1px solid #ddd;break-inside:avoid}
  .child-panel{display:block!important}
}