*{margin:0;padding:0;box-sizing:border-box}:root{--primary: #667eea;--primary-dark: #5568d3;--secondary: #764ba2;--success: #10b981;--warning: #f59e0b;--danger: #ef4444;--text: #1f2937;--text-light: #6b7280;--bg: #f9fafb;--card-bg: #ffffff;--border: #e5e7eb}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.layout{min-height:100vh;display:flex;flex-direction:column}.main-nav{background:var(--card-bg);border-bottom:1px solid var(--border);padding:1rem 2rem;position:sticky;top:0;z-index:100}.nav-content{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;gap:2rem}.nav-brand h2{font-size:1.5rem;color:var(--primary)}.nav-links{display:flex;gap:1.5rem;flex:1}.nav-links a{color:var(--text);text-decoration:none;padding:.5rem 1rem;border-radius:6px;transition:all .2s}.nav-links a:hover{background:var(--bg)}.nav-links a.active{background:var(--primary);color:#fff}.nav-user{display:flex;align-items:center;gap:1rem}.user-info{color:var(--text-light);font-size:.9rem}.btn-logout{background:transparent;border:1px solid var(--border);padding:.5rem 1rem;border-radius:6px;cursor:pointer;font-size:.9rem;transition:all .2s}.btn-logout:hover{background:var(--danger);color:#fff;border-color:var(--danger)}.main-content{flex:1;max-width:1200px;width:100%;margin:0 auto;padding:2rem}.register-page,.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem;background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%)}.register-container{display:grid;grid-template-columns:1fr 1fr;gap:2rem;max-width:1000px;width:100%}.login-container{max-width:450px;width:100%}.register-card,.login-card,.benefits-card{background:var(--card-bg);padding:2.5rem;border-radius:12px;box-shadow:0 4px 6px #0000001a}.register-card h1,.login-card h1{margin-bottom:.5rem;font-size:2rem}.subtitle{color:var(--text-light);margin-bottom:2rem}.form-group{margin-bottom:1.5rem}.form-group label{display:block;margin-bottom:.5rem;font-weight:500;color:var(--text)}.form-group input[type=text],.form-group input[type=email],.form-group input[type=password],.form-group input[type=date]{width:100%;padding:.75rem;border:1px solid var(--border);border-radius:6px;font-size:1rem;transition:border-color .2s}.form-group input:focus{outline:none;border-color:var(--primary)}.form-group.checkbox label{display:flex;align-items:flex-start;gap:.5rem;cursor:pointer}.form-group.checkbox input{margin-top:.25rem;cursor:pointer}.btn-primary{width:100%;padding:1rem;background:var(--primary);color:#fff;border:none;border-radius:6px;font-size:1.1rem;font-weight:600;cursor:pointer;transition:background .2s}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.error-message{background:#fee2e2;color:var(--danger);padding:.75rem;border-radius:6px;margin-bottom:1rem;border:1px solid var(--danger)}.login-link,.register-link{text-align:center;margin-top:1.5rem;color:var(--text-light)}.login-link a,.register-link a{color:var(--primary);text-decoration:none;font-weight:600}.benefits-card h3{margin-bottom:1rem}.benefits-card ul{list-style:none;margin-bottom:1.5rem}.benefits-card li{padding:.75rem 0;border-bottom:1px solid var(--border)}.benefits-card li:last-child{border-bottom:none}.welcome-bonus{background:linear-gradient(135deg,var(--primary) 0%,var(--secondary) 100%);color:#fff;padding:1.5rem;border-radius:8px;text-align:center}.bonus-amount{font-size:2rem;font-weight:700;color:#fbbf24;margin:.5rem 0}.dashboard-page{display:flex;flex-direction:column;gap:2rem}.dashboard-header h1{font-size:2rem;margin-bottom:.5rem}.dashboard-header p{color:var(--text-light)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem}.stat-card{background:var(--card-bg);padding:1.5rem;border-radius:12px;box-shadow:0 2px 4px #0000000d;display:flex;align-items:center;gap:1rem}.stat-icon{font-size:2.5rem}.stat-label{color:var(--text-light);font-size:.9rem;margin-bottom:.25rem}.stat-value{font-size:2rem;font-weight:700;color:var(--text)}.stat-subtitle{color:var(--text-light);font-size:.85rem}.level-progress-card,.achievements-summary-card,.recent-activity-card{background:var(--card-bg);padding:2rem;border-radius:12px;box-shadow:0 2px 4px #0000000d}.progress-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.progress-bar{height:24px;background:var(--bg);border-radius:12px;overflow:hidden;margin-bottom:.5rem}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary) 0%,var(--secondary) 100%);transition:width .3s ease}.next-level{color:var(--text-light)}.placeholder-content{padding:2rem;text-align:center;color:var(--text-light)}.loading{display:flex;justify-content:center;align-items:center;min-height:400px;font-size:1.2rem;color:var(--text-light)}@media (max-width: 768px){.register-container{grid-template-columns:1fr}.benefits-card{order:-1}.nav-content{flex-direction:column;gap:1rem}.nav-links{flex-direction:column;width:100%}}