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h1{font-size:2.5rem}.items-grid{gap:1.5rem;grid-template-columns:1fr}.filter-buttons{gap:.75rem}.filter-btn{font-size:.9rem;padding:.6rem 1.2rem}}.item-detail{margin:0 auto;max-width:1200px}.back-btn{align-items:center;background:#fff;border:2px solid #667eea;border-radius:12px;color:#667eea;cursor:pointer;display:inline-flex;font-size:1rem;font-weight:600;gap:.5rem;margin-bottom:2rem;padding:.75rem 1.5rem;transition:all .3s cubic-bezier(.4,0,.2,1)}.back-btn:hover{background:#667eea;box-shadow:0 8px 20px #667eea4d;color:#fff;transform:translateY(-2px)}.detail-container{grid-gap:0;background:#fff;border-radius:24px;box-shadow:0 8px 32px #00000014;display:grid;gap:0;grid-template-columns:1fr 1fr;overflow:hidden}.detail-image-section{height:600px;overflow:hidden;position:relative}.detail-image{height:100%;object-fit:cover;width:100%}.featured-badge{background:linear-gradient(135deg,#667eea,#764ba2);border-radius:24px;box-shadow:0 4px 12px 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(max-width:768px){.detail-image-section{height:300px}.detail-content{padding:1.5rem}.detail-title{font-size:1.75rem}.detail-description{font-size:1rem}.detail-meta{padding:1.5rem}}.app{display:flex;flex-direction:column;min-height:100vh}.main-content{flex:1 1;margin:0 auto;max-width:1400px;padding:2rem;width:100%}@media (max-width:768px){.main-content{padding:1rem}}