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1rem}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3;margin-bottom:1rem;color:var(--text-dark)}h1{font-size:2.5rem;background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}h2{font-size:2rem}h3{font-size:1.5rem}p{margin-bottom:1rem;color:var(--text-light)}.page{min-height:calc(100vh - 200px);padding:2rem 0}.page-header{text-align:center;margin-bottom:3rem}.page-header h1{margin-bottom:.5rem}.page-header p{font-size:1.2rem;color:var(--text-light)}.card{background:var(--bg-white);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem;transition:var(--transition);border:1px solid var(--border-color)}.card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.article-card{background:var(--bg-white);border-radius:var(--radius);box-shadow:var(--shadow);padding:1.5rem;margin-bottom:1.5rem;transition:var(--transition);border-left:4px solid var(--primary-color)}.article-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.article-card h3{color:var(--text-dark);margin-bottom:.5rem}.article-card p{color:var(--text-light);margin-bottom:.5rem}.articles-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem;margin-top:2rem}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border:none;border-radius:var(--radius);font-size:.9rem;font-weight:500;text-decoration:none;cursor:pointer;transition:var(--transition);gap:.5rem}.btn-primary{background:linear-gradient(135deg,var(--primary-color),var(--secondary-color));color:#fff}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-secondary{background:var(--bg-white);color:var(--primary-color);border:2px solid var(--primary-color)}.btn-secondary:hover{background:var(--primary-color);color:#fff}.btn-ghost{background:transparent;color:var(--text-light);border:1px solid var(--border-color)}.btn-ghost:hover{background:var(--bg-light);color:var(--text-dark)}.form-group{margin-bottom:1.5rem}.form-label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text-dark)}.form-input{width:100%;padding:.75rem 1rem;border:2px solid var(--border-color);border-radius:var(--radius);font-size:1rem;transition:var(--transition);background:var(--bg-white)}.form-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #667eea1a}.form-textarea{resize:vertical;min-height:120px}.loading{display:flex;justify-content:center;align-items:center;padding:2rem}.loading-spinner{width:40px;height:40px;border:4px solid var(--border-color);border-left:4px solid var(--primary-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.empty-state{text-align:center;padding:3rem 1rem;color:var(--text-light)}.empty-state-icon{font-size:3rem;margin-bottom:1rem;opacity:.5}.text-center{text-align:center}.text-left{text-align:left}.text-right{text-align:right}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mb-4{margin-bottom:2rem}.p-1{padding:.5rem}.p-2{padding:1rem}.p-3{padding:1.5rem}.p-4{padding:2rem}.d-flex{display:flex}.flex-column{flex-direction:column}.align-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}@media (max-width: 768px){.main-content{padding-top:1rem;padding-bottom:1rem}h1{font-size:2rem}h2{font-size:1.75rem}h3{font-size:1.25rem}.articles-grid{grid-template-columns:1fr;gap:1rem}.page-header{margin-bottom:2rem}.container{padding:0 .5rem}}@media (max-width: 480px){.card,.article-card{padding:1rem}.btn{padding:.6rem 1.2rem;font-size:.85rem}}@media (prefers-color-scheme: dark){:root{--text-dark: #f7fafc;--text-light: #cbd5e0;--bg-light: #1a202c;--bg-white: #2d3748;--border-color: #4a5568}}