*{margin:0;padding:0;box-sizing:border-box}
:root{--primary:#2c3e50;--secondary:#667eea;--secondary-dark:#764ba2;--text:#333;--text-light:#666;--bg:#fff;--bg-light:#f8f9fa;--shadow:0 5px 15px rgba(0,0,0,0.1);--radius:10px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;line-height:1.6;color:var(--text);background:var(--bg);overflow-x:hidden}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
header{background:var(--primary);color:#fff;padding:1rem 0;position:sticky;top:0;z-index:100;box-shadow:0 2px 5px rgba(0,0,0,0.1)}
nav{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:1rem}
.logo{font-size:1.5rem;font-weight:700;text-decoration:none;color:#fff}
.nav-links{display:flex;list-style:none;gap:2rem}
.nav-links a{color:#fff;text-decoration:none;transition:opacity 0.3s}
.nav-links a:hover{opacity:0.8}
.dropdown{position:relative}
.dropdown-toggle{cursor:pointer}
.dropdown-menu{position:absolute;top:100%;left:0;background:#1a252f;min-width:220px;box-shadow:0 2px 10px rgba(0,0,0,0.2);border-radius:5px;margin-top:10px;display:none;z-index:1000;max-height:400px;overflow-y:auto}
.dropdown:hover .dropdown-menu{display:block}
.dropdown-menu li{list-style:none}
.dropdown-menu a{display:block;padding:10px 20px;white-space:nowrap;border-bottom:1px solid rgba(255,255,255,0.1);font-size:0.9rem}
.dropdown-menu a:hover{background:rgba(255,255,255,0.1)}
.dropdown-menu a.active{background:var(--secondary);color:#fff}
.dropdown-menu li:last-child a{border-bottom:none}
.mobile-menu{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}
.search-container{position:relative}
#search{padding:0.5rem 1rem;border:none;border-radius:20px;width:200px;font-size:0.9rem}
.search-results{position:absolute;top:100%;left:0;right:0;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);margin-top:0.5rem;max-height:400px;overflow-y:auto;display:none}
.search-result{padding:1rem;border-bottom:1px solid #eee;cursor:pointer;transition:background 0.2s}
.search-result:hover{background:var(--bg-light)}
.search-result h4{color:var(--primary);margin-bottom:0.25rem}
.search-result p{font-size:0.85rem;color:var(--text-light)}
.hero{background:linear-gradient(135deg,var(--secondary) 0%,var(--secondary-dark) 100%);color:#fff;padding:4rem 0;text-align:center}
.hero h1{font-size:clamp(2rem,5vw,3rem);margin-bottom:1rem;font-weight:700}
.hero p{font-size:1.2rem;opacity:0.95}
.tip-of-day{background:#fff;border-radius:var(--radius);padding:2rem;margin:2rem auto;max-width:800px;box-shadow:var(--shadow);animation:fadeIn 0.5s ease-in}
.tip-of-day h2{color:var(--primary);margin-bottom:1rem;font-size:1.75rem}
.tip-content h3{color:var(--secondary);margin-bottom:1rem;font-size:1.25rem}
.tip-content p{font-size:1.1rem;line-height:1.8;color:var(--text)}
.tip-meta{display:flex;justify-content:space-between;margin-top:1.5rem;padding-top:1rem;border-top:1px solid #eee;font-size:0.9rem;color:var(--text-light)}
.categories{padding:4rem 0;background:var(--bg-light)}
.categories h2{text-align:center;font-size:2.25rem;margin-bottom:3rem;color:var(--primary)}
.category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem}
.category-card{background:var(--bg);border-radius:var(--radius);padding:2rem;text-align:center;transition:transform 0.3s,box-shadow 0.3s;cursor:pointer;text-decoration:none;color:var(--text);display:block}
.category-card:hover{transform:translateY(-5px);box-shadow:0 10px 25px rgba(0,0,0,0.15)}
.category-icon{font-size:3rem;margin-bottom:1rem;display:block}
.category-title{font-size:1.25rem;font-weight:600;margin-bottom:0.5rem;color:var(--primary)}
.category-count{color:var(--text-light);font-size:0.9rem}
.recent-tips{padding:4rem 0}
.recent-tips h2{text-align:center;font-size:2.25rem;margin-bottom:3rem;color:var(--primary)}
.tips-carousel{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem}
.tip-card{background:var(--bg-light);border-radius:var(--radius);padding:1.5rem;transition:all 0.3s;cursor:pointer;border:2px solid transparent}
.tip-card:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-color:var(--secondary)}
.tip-card h3{color:var(--primary);margin-bottom:0.75rem;font-size:1.15rem;line-height:1.4}
.tip-card p{color:var(--text-light);font-size:0.95rem;line-height:1.6}
.newsletter{background:var(--primary);color:#fff;padding:3rem 0;text-align:center}
.newsletter h2{font-size:2rem;margin-bottom:1rem}
.newsletter p{margin-bottom:2rem;opacity:0.9;font-size:1.1rem}
.newsletter-form{display:flex;justify-content:center;gap:1rem;flex-wrap:wrap;max-width:500px;margin:0 auto}
.newsletter-form input{padding:0.75rem 1.5rem;border:none;border-radius:5px;font-size:1rem;flex:1;min-width:250px}
.newsletter-form button{padding:0.75rem 2rem;background:var(--secondary);color:#fff;border:none;border-radius:5px;font-size:1rem;font-weight:600;cursor:pointer;transition:background 0.3s;white-space:nowrap}
.newsletter-form button:hover{background:var(--secondary-dark)}
footer{background:#1a252f;color:#fff;padding:3rem 0;text-align:center}
.footer-links{display:flex;justify-content:center;gap:2rem;margin-bottom:2rem;flex-wrap:wrap}
.footer-links a{color:#fff;text-decoration:none;opacity:0.8;transition:opacity 0.3s;font-size:0.95rem}
.footer-links a:hover{opacity:1}
.social-share{position:fixed;right:20px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:1rem;z-index:99}
.social-share a{width:40px;height:40px;background:var(--secondary);color:#fff;display:flex;align-items:center;justify-content:center;border-radius:50%;text-decoration:none;transition:all 0.3s;font-weight:700}
.social-share a:hover{background:var(--secondary-dark);transform:scale(1.1)}
.category-page{padding:3rem 0}
.category-header{background:var(--secondary);color:#fff;padding:3rem 0;text-align:center;margin-bottom:3rem}
.category-header h1{font-size:2.5rem;margin-bottom:1rem}
.category-header p{font-size:1.2rem;opacity:0.95;margin-bottom:1.5rem}
.category-stats{display:flex;gap:2rem;justify-content:center;flex-wrap:wrap;font-size:0.95rem}
.category-stats span{background:rgba(255,255,255,0.2);padding:0.5rem 1rem;border-radius:20px;backdrop-filter:blur(10px)}
.tips-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:2rem;margin-bottom:3rem}
.tip-item{background:#fff;border-radius:var(--radius);padding:2rem;box-shadow:0 2px 10px rgba(0,0,0,0.05);transition:all 0.3s;border:1px solid #eee}
.tip-item:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.tip-item h2{color:var(--primary);margin-bottom:1rem;font-size:1.35rem}
.tip-item .excerpt{color:var(--text-light);line-height:1.6;margin-bottom:1rem}
.tip-item .read-more{color:var(--secondary);text-decoration:none;font-weight:600;transition:color 0.3s}
.tip-item .read-more:hover{color:var(--secondary-dark)}
.pagination{display:flex;justify-content:center;gap:0.5rem;margin-top:3rem}
.pagination a,.pagination span{padding:0.5rem 1rem;background:#fff;border:1px solid #ddd;border-radius:5px;text-decoration:none;color:var(--text);transition:all 0.3s}
.pagination a:hover{background:var(--secondary);color:#fff;border-color:var(--secondary)}
.pagination .current{background:var(--secondary);color:#fff;border-color:var(--secondary)}
.tip-page{max-width:800px;margin:0 auto;padding:3rem 20px}
.tip-page h1{color:var(--primary);font-size:2.25rem;margin-bottom:1.5rem;line-height:1.3}
.tip-page .meta{display:flex;gap:2rem;margin-bottom:2rem;color:var(--text-light);font-size:0.95rem;flex-wrap:wrap}
.tip-page .content{font-size:1.1rem;line-height:1.8;color:var(--text)}
.tip-page .content h2{color:var(--primary);margin:2rem 0 1rem;font-size:1.5rem}
.tip-page .content h3{color:var(--secondary);margin:1.5rem 0 0.75rem;font-size:1.25rem}
.tip-page .content ul,.tip-page .content ol{margin:1rem 0 1rem 2rem}
.tip-page .content li{margin-bottom:0.5rem}
.related-tips{margin-top:4rem;padding-top:3rem;border-top:2px solid #eee}
.related-tips h2{color:var(--primary);margin-bottom:2rem;font-size:1.75rem}
.breadcrumb{padding:1rem 0;font-size:0.9rem;color:var(--text-light)}
.breadcrumb a{color:var(--secondary);text-decoration:none;transition:color 0.3s}
.breadcrumb a:hover{color:var(--secondary-dark)}
.breadcrumb span{margin:0 0.5rem}
.category-filters{background:var(--bg-light);padding:1.5rem;border-radius:var(--radius);margin-bottom:2rem;display:flex;gap:2rem;flex-wrap:wrap;align-items:center}
.filter-group{display:flex;align-items:center;gap:1rem}
.filter-group label{font-weight:600;color:var(--primary)}
#sort-filter{padding:0.5rem 1rem;border:1px solid #ddd;border-radius:5px;background:#fff;font-size:0.9rem}
.topic-tags{display:flex;gap:0.5rem;flex-wrap:wrap}
.tag{background:var(--bg);padding:0.5rem 1rem;border-radius:20px;text-decoration:none;color:var(--text);border:1px solid #ddd;font-size:0.85rem;transition:all 0.3s}
.tag:hover,.tag.active{background:var(--secondary);color:#fff;border-color:var(--secondary)}
.tip-meta-inline{display:flex;gap:1rem;margin:1rem 0;font-size:0.85rem;color:var(--text-light)}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.skeleton{background:linear-gradient(90deg,#f0f0f0 25%,#e0e0e0 50%,#f0f0f0 75%);background-size:200% 100%;animation:loading 1.5s infinite}
@keyframes loading{0%{background-position:200% 0}100%{background-position:-200% 0}}
@media(max-width:768px){
.nav-links{position:fixed;top:60px;left:0;right:0;background:var(--primary);flex-direction:column;padding:2rem;transform:translateX(-100%);transition:transform 0.3s}
.nav-links.active{transform:translateX(0)}
.mobile-menu{display:block}
#search{width:150px}
.hero{padding:3rem 0}
.hero h1{font-size:2rem}
.category-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:1rem}
.category-card{padding:1.5rem}
.category-icon{font-size:2.5rem}
.tips-carousel{grid-template-columns:1fr}
.newsletter-form{flex-direction:column;align-items:stretch}
.newsletter-form input{width:100%}
.social-share{right:10px}
.tip-of-day{margin:1rem;padding:1.5rem}
.tips-grid{grid-template-columns:1fr}
.tip-page{padding:2rem 20px}
.tip-page h1{font-size:1.75rem}
footer{padding:2rem 0}
.footer-links{flex-direction:column;gap:1rem}
}
@media(prefers-reduced-motion:reduce){
*{animation:none!important;transition:none!important}}
@media(prefers-color-scheme:dark){
:root{--text:#e0e0e0;--text-light:#b0b0b0;--bg:#1a1a1a;--bg-light:#2a2a2a}
body{background:var(--bg);color:var(--text)}
.search-results{background:var(--bg-light);border:1px solid #444}
.tip-of-day{background:var(--bg-light)}
.category-card{background:var(--bg-light)}
.tip-card{background:var(--bg-light)}
.tip-item{background:var(--bg-light);border-color:#444}
input{background:var(--bg-light);color:var(--text);border:1px solid #444}
}