.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255);backdrop-filter:blur(8px);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-sm)}.nav{display:flex;align-items:center;justify-content:space-between;height:70px;padding:0 20px}.logo img{height:40px;display:block}.nav-menu{display:flex;align-items:center;gap:2rem;list-style:none;margin:0;padding:0}.nav-link{color:var(--text-dark);text-decoration:none;font-weight:600;font-size:.95rem;transition:var(--transition-normal)}.nav-link:hover{color:var(--primary-color)}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:var(--radius-lg);text-decoration:none;font-weight:600;transition:var(--transition-normal);border:none;cursor:pointer;font-family:inherit}.btn.btn-primary{background:var(--gradient-primary);color:white;box-shadow:var(--shadow-md)}.btn.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.nav-dropdown{position:relative}.dropdown-toggle{display:flex;align-items:center;gap:.4rem}.dropdown-menu{position:absolute;top:120%;left:0;background:#ffffff;border:1px solid #e5e7eb;border-radius:12px;padding:1rem;min-width:280px;display:none;box-shadow:0 10px 25px rgba(0,0,0,.1)}.nav-dropdown:hover .dropdown-menu{display:grid;gap:1rem;grid-template-columns:1fr}.dropdown-menu-simple{grid-template-columns:1fr!important}.dropdown-section h4{color:#374151;margin:0 0 .5rem;font-size:.95rem;font-weight:600}.dropdown-item{color:#4b5563;text-decoration:none;padding:.5rem .75rem;display:block;border-radius:6px;transition:all .2s ease}.dropdown-item:hover{color:#1f2937;background-color:#f3f4f6}.mobile-menu-toggle{display:none;background:none;border:0;color:#e5e7eb;font-size:1.25rem}.nav-search{display:flex;align-items:center;margin:0 1rem}.search-form{margin:0}.search-input-group{position:relative;display:flex;align-items:center;background:rgba(255,255,255,.9);border-radius:25px;padding:0;border:1px solid rgba(255,255,255,.95);transition:all .3s ease;box-shadow:0 2px 4px rgba(0,0,0,.1)}.search-input-group:focus-within{background:rgba(255,255,255,1);border-color:#3b82f6;box-shadow:0 0 0 3px rgba(59,130,246,.1),0 2px 8px rgba(0,0,0,.15)}.search-input{background:transparent;border:none;padding:.6rem 1rem;color:#374151;font-size:.9rem;width:250px;outline:none;border-radius:25px;font-weight:400}.search-input::placeholder{color:#6b7280}.search-input:focus{color:#111827}.search-btn{background:transparent;border:none;color:#6b7280;padding:.6rem 1rem;cursor:pointer;transition:color .3s ease;border-radius:0 25px 25px 0}.search-btn:hover{color:#3b82f6}.search-btn i{font-size:.9rem}body[data-page-type="article"] .nav-search,body[data-page-type="article"] .nav-dropdown{display:none!important}@media (max-width:768px){.nav-search{display:none}.nav-menu{position:fixed;inset:70px 0 0 0;background:rgba(255,255,255,.98);backdrop-filter:blur(10px);display:none;flex-direction:column;padding:2rem;box-shadow:var(--shadow-lg)}.nav-menu.open{display:flex}.mobile-menu-toggle{display:inline-flex;background:none;border:none;font-size:1.5rem;color:var(--text-dark);cursor:pointer}}.nav-dropdown::before{content:'';position:absolute;top:100%;left:0;right:0;height:10px;background:transparent;z-index:999}.nav-dropdown:hover .dropdown-menu-simple,.dropdown-menu-simple:hover{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto}.dropdown-menu-simple{position:absolute;top:100%;left:0;background:#ffffff;border:1px solid #e5e7eb;box-shadow:0 10px 25px rgba(0,0,0,.1);border-radius:8px;padding:.25rem 0;min-width:200px;z-index:1000;opacity:0;visibility:hidden;transform:translateY(-10px);transition:all .3s ease;pointer-events:none}.dropdown-menu-simple .dropdown-item{color:#374151;padding:.5rem 1.25rem;text-decoration:none;display:block;transition:all .2s ease;border:none;background:transparent;white-space:nowrap}.dropdown-menu-simple .dropdown-item:hover{background-color:#f3f4f6;color:#1f2937}.dropdown-menu-simple .dropdown-item:focus{background-color:#3b82f6;color:#ffffff;outline:none}.dropdown-menu-simple .dropdown-item.active{background-color:#3b82f6;color:#ffffff;font-weight:600}.dropdown-toggle i{transition:transform .3s ease}.nav-dropdown:hover .dropdown-toggle i{transform:rotate(180deg)}.search-results-info{margin-bottom:2rem}.alert{padding:1rem 1.5rem;border-radius:8px;border:1px solid;margin-bottom:1rem;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}.alert-info{background-color:rgba(59,130,246,.1);border-color:rgba(59,130,246,.3);color:#1e40af}.alert i{margin-right:.5rem}.btn-sm{padding:.375rem .75rem;font-size:.875rem;border-radius:6px}.btn-outline-secondary{color:#6b7280;border:1px solid #d1d5db;background:transparent;text-decoration:none;transition:all .2s}.btn-outline-secondary:hover{background-color:#f3f4f6;color:#374151}.ml-2{margin-left:.5rem}.mock-post:hover{transform:translateY(-2px);transition:all .3s ease}.mock-post:hover .mock-title{color:#3b82f6}