:root{--primary: #6366f1;--primary-hover: #4f46e5;--secondary: #64748b;--bg: #f8fafc;--card-bg: #ffffff;--text-main: #1e293b;--text-muted: #64748b;--success: #22c55e;--danger: #ef4444;--shadow: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--radius: 12px}body{font-family:Inter,system-ui,-apple-system,sans-serif;margin:0;padding:0;background-color:var(--bg);color:var(--text-main);line-height:1.5}.container{max-width:1000px;margin:0 auto;padding:2rem 1rem}h1,h2,h3{color:var(--text-main);font-weight:700;margin-top:0}.topic-card{background:var(--card-bg);padding:2.5rem;border-radius:var(--radius);box-shadow:var(--shadow);text-align:center;transition:transform .2s}.content{font-size:1.75rem;font-weight:600;margin-bottom:2rem;color:var(--text-main);font-style:italic}.badge{background:#e2e8f0;color:var(--text-main);padding:.4rem .8rem;border-radius:20px;margin:.25rem;font-size:.85rem;font-weight:500;display:inline-block}.actions{display:flex;justify-content:center;gap:1rem;margin-top:2rem}button{padding:.75rem 1.5rem;cursor:pointer;border:none;border-radius:8px;background-color:var(--primary);color:#fff;font-weight:600;font-size:1rem;transition:all .2s;display:inline-flex;align-items:center;justify-content:center}button:hover{background-color:var(--primary-hover);transform:translateY(-1px)}button:active{transform:translateY(0)}button:disabled{background-color:#cbd5e1;cursor:not-allowed;transform:none}.btn-secondary{background-color:var(--secondary)}.next-btn{margin-top:2rem;background-color:var(--text-main);width:100%}textarea,input[type=text],input[type=password]{width:100%;padding:.75rem;border:1px solid #e2e8f0;border-radius:8px;font-size:1rem;background-color:#fff;transition:border-color .2s;box-sizing:border-box}textarea:focus,input:focus{outline:none;border-color:var(--primary);ring:2px solid var(--primary)}textarea{min-height:120px;resize:vertical}table{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);margin:1.5rem 0}th,td{padding:1rem;text-align:left;border-bottom:1px solid #f1f5f9}th{background-color:#f8fafc;font-weight:600;color:var(--text-muted);text-transform:uppercase;font-size:.75rem;letter-spacing:.05em}.alert{padding:1rem;border-radius:8px;margin-bottom:1.5rem;font-weight:500}.alert-info{background-color:#eff6ff;color:#1d4ed8;border:1px solid #dbeafe}.alert-error{background-color:#fef2f2;color:#b91c1c;border:1px solid #fee2e2}header{background-color:#fff;box-shadow:0 1px 3px #0000001a;padding:1rem 2rem}.nav-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.logo{font-size:1.5rem;font-weight:800;color:var(--primary);text-decoration:none}.nav-links{display:flex;align-items:center;gap:1.5rem}.nav-links a{text-decoration:none;color:var(--text-main);font-weight:500;transition:color .2s}.nav-links a:hover{color:var(--primary)}.user-info{display:flex;align-items:center;gap:1rem;padding-left:1.5rem;border-left:1px solid #e2e8f0}.username{font-weight:600;color:var(--text-main)}.btn-success{background-color:var(--success)}.btn-danger{background-color:var(--danger)}.hero{text-align:center;margin-bottom:3rem}.subtitle{color:var(--text-muted);font-size:1.25rem}.loading-container{text-align:center;padding:5rem 0}.loader{border:4px solid #f3f3f3;border-top:4px solid var(--primary);border-radius:50%;width:40px;height:40px;animation:spin 1s linear infinite;margin:0 auto 1rem}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.card{background:#fff;padding:2rem;border-radius:var(--radius);box-shadow:var(--shadow)}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:600;color:var(--text-main)}.form-label{font-weight:600;margin-bottom:.75rem}.categories-grid{display:flex;flex-wrap:wrap;gap:.75rem;margin-bottom:1.5rem}.category-pill{padding:.5rem 1rem;border:1px solid #e2e8f0;border-radius:20px;cursor:pointer;font-size:.875rem;font-weight:500;transition:all .2s;-webkit-user-select:none;user-select:none}.category-pill input{display:none}.category-pill:hover{border-color:var(--primary);background-color:#f1f5f9}.category-pill.active{background-color:var(--primary);color:#fff;border-color:var(--primary)}.submit-btn{width:100%}.admin-header{margin-bottom:2rem}.admin-section{margin-bottom:3rem}.empty-state{text-align:center;padding:3rem;background:#fff;border-radius:var(--radius);color:var(--text-muted);border:2px dashed #e2e8f0}.topic-content{font-weight:500;margin-bottom:.5rem}.badge-sm{font-size:.75rem;padding:.2rem .5rem;background:#f1f5f9;border-radius:4px;margin-right:.4rem;color:var(--text-muted)}.user-badge{background:#eff6ff;color:#1d4ed8;padding:.25rem .75rem;border-radius:9999px;font-size:.875rem;font-weight:600}.btn-group{display:flex;gap:.5rem;justify-content:flex-end}.btn-sm{padding:.4rem .8rem;font-size:.875rem}.text-right{text-align:right}.font-bold{font-weight:700}.mb-2{margin-bottom:.5rem}.mb-4{margin-bottom:1rem}.form-inline{display:flex;gap:1rem}.add-category-card{background:#fff;padding:1.5rem;border-radius:var(--radius);box-shadow:var(--shadow)}.topic-tag{display:inline-block;background:#f8fafc;border:1px solid #e2e8f0;padding:.1rem .4rem;border-radius:4px;font-size:.75rem;margin:.2rem}.input-sm{padding:.4rem;font-size:.875rem}.categories-grid-sm{display:flex;flex-wrap:wrap;gap:.4rem}.category-pill-sm{padding:.25rem .6rem;border:1px solid #e2e8f0;border-radius:12px;cursor:pointer;font-size:.75rem}.category-pill-sm input{display:none}.category-pill-sm.active{background:var(--primary);color:#fff;border-color:var(--primary)}.auth-container{display:flex;justify-content:center;align-items:center;min-height:70vh}.auth-card{width:100%;max-width:400px;text-align:center}.auth-footer{margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid #e2e8f0;color:var(--text-muted);font-size:.875rem}.auth-footer a{color:var(--primary);text-decoration:none;font-weight:600}.auth-footer a:hover{text-decoration:underline}.stats-group{display:flex;gap:.8rem}.stat-badge{font-size:.875rem;font-weight:600;white-space:nowrap}.text-sm{font-size:.875rem}.w-full{width:100%}.btn-register{background-color:var(--primary);color:#fff!important;padding:.5rem 1rem;border-radius:8px;font-weight:600}.btn-register:hover{background-color:var(--primary-hover);color:#fff!important}.nav-links a.active{color:var(--primary);font-weight:700}