*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;color:#222;background:#f5f5f5;line-height:1.6}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
a{color:#00aa66;text-decoration:none}

.site-header{background:#fff;border-bottom:1px solid #eee;padding:14px 0}
.header-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px}
.logo{font-size:24px;color:#333;text-decoration:none}
.logo strong{color:#00aa66}
.nav a{margin-left:20px;color:#555;text-decoration:none;font-size:14px;font-weight:500}
.nav a:hover{color:#00aa66}

.btn{display:inline-block;padding:10px 20px;border-radius:8px;border:none;cursor:pointer;font-size:14px;font-weight:600;text-decoration:none}
.btn-green{background:#00aa66;color:#fff}
.btn-green:hover{background:#009955}
.btn-outline{border:1px solid #ddd;background:#fff;color:#555}
.btn-lg{padding:14px 32px;font-size:16px}

.hero{text-align:center;padding:60px 20px;background:linear-gradient(135deg,#00aa66 0%,#007744 100%);color:#fff;border-radius:16px;margin:20px 0}
.hero h1{font-size:32px;margin-bottom:12px}
.hero p{font-size:18px;opacity:.9}
.hero-search{margin-top:24px;display:flex;max-width:500px;margin:24px auto 0}
.hero-search input{flex:1;padding:14px 18px;border:none;border-radius:8px 0 0 8px;font-size:16px}
.hero-search button{padding:14px 24px;background:#ff6b00;color:#fff;border:none;border-radius:0 8px 8px 0;font-size:16px;cursor:pointer}

.categories-grid{padding:40px 0}
.categories-grid h2{margin-bottom:20px;font-size:22px}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.cat-card{display:flex;align-items:center;gap:8px;padding:16px;background:#fff;border-radius:12px;text-align:left;transition:transform .2s}
.cat-card:hover{transform:translateY(-2px)}
.cat-icon{font-size:28px}

.listings-section{padding:20px 0 40px}
.listings-section h2{margin-bottom:16px;font-size:22px}
.listings-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.listing-card{display:block;background:#fff;border-radius:12px;overflow:hidden;transition:box-shadow .2s}
.listing-card:hover{box-shadow:0 4px 16px rgba(0,0,0,.1)}
.lc-photo img{width:100%;height:200px;object-fit:cover;background:#eee}
.lc-info{padding:14px}
.lc-price{font-size:18px;font-weight:700;color:#222;margin-bottom:4px}
.lc-title{font-size:14px;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.lc-meta{font-size:12px;color:#999}
.lc-cat{font-size:12px;color:#00aa66}

.catalog-page{padding:30px 0}
.filters{margin-bottom:24px}
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.filter-bar input,.filter-bar select{padding:10px 14px;border:1px solid #ddd;border-radius:8px;font-size:14px}
.filter-bar button{padding:10px 20px;background:#00aa66;color:#fff;border:none;border-radius:8px;cursor:pointer}
.results-count{font-size:14px;color:#666}

.listing-detail{padding:30px 0}
.detail-main{display:grid;grid-template-columns:1fr 1fr;gap:30px;background:#fff;border-radius:16px;padding:24px}
.detail-photo img{width:100%;border-radius:12px;min-height:300px;object-fit:cover;background:#eee}
.detail-info h1{font-size:24px;margin-bottom:8px}
.detail-price{font-size:28px;font-weight:700;color:#222;margin-bottom:12px}
.detail-meta{display:flex;gap:16px;font-size:14px;color:#666;margin-bottom:16px}
.seller-box{background:#f9f9f9;padding:16px;border-radius:12px}
.empty-state{padding:60px;text-align:center;color:#999;font-size:18px}
.back-link{color:#00aa66;font-size:14px}
.form-page{padding:30px 0}
.ad-form{max-width:600px;background:#fff;padding:24px;border-radius:16px}
.ad-form label{display:block;margin-bottom:16px}
.ad-form input,.ad-form textarea,.ad-form select{width:100%;padding:12px;border:1px solid #ddd;border-radius:8px;font-size:14px;margin-top:4px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.error-msg{background:#fee;padding:12px;border-radius:8px;color:#c00;margin-bottom:16px}

.site-footer{margin-top:40px;padding:30px 0;background:#f8f8f8;border-top:1px solid #eee}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px}
.footer-inner a{color:#00aa66}
.footer-inner p{margin-bottom:4px;font-size:14px}

@media(max-width:768px){
  .detail-main{grid-template-columns:1fr}
  .hero h1{font-size:24px}
  .form-row{grid-template-columns:1fr}
  .filter-bar{flex-direction:column}
}