:root{--primary-color: #25D366;--primary-dark: #1DA851;--secondary-color: #128C7E;--text-color: #2c3e50;--text-light: #7f8c8d;--bg-color: #ffffff;--bg-light: #f8f9fa;--border-color: #e0e0e0;--error-color: #e74c3c;--success-color: #27ae60;--focus-color: #3498db;--shadow: 0 2px 8px rgba(0, 0, 0, .1);--shadow-lg: 0 4px 16px rgba(0, 0, 0, .15)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;color:var(--text-color);background-color:var(--bg-light);line-height:1.6;font-size:16px}h1,h2,h3{color:var(--text-color);line-height:1.2}h1{font-size:2rem;margin-bottom:1rem}h2{font-size:1.5rem;margin-bottom:.75rem}.btn{display:inline-block;padding:12px 24px;border:none;border-radius:8px;font-size:1rem;font-weight:600;text-decoration:none;cursor:pointer;transition:all .2s;min-height:44px;min-width:44px;text-align:center}.btn:focus{outline:3px solid var(--focus-color);outline-offset:2px}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:var(--primary-dark)}.btn-secondary{background-color:var(--secondary-color);color:#fff}.btn-outline{background-color:transparent;border:2px solid var(--primary-color);color:var(--primary-color)}.btn-outline:hover{background-color:var(--primary-color);color:#fff}.btn-link{background:none;color:var(--primary-color);text-decoration:underline;padding:8px}.btn-large{padding:16px 32px;font-size:1.1rem}.btn:disabled{opacity:.6;cursor:not-allowed}.form-group{margin-bottom:1.5rem}label{display:block;margin-bottom:.5rem;font-weight:600;color:var(--text-color)}input[type=text],input[type=tel],input[type=email],select{width:100%;padding:12px;border:2px solid var(--border-color);border-radius:8px;font-size:1rem;transition:border-color .2s;min-height:44px}input:focus,select:focus{outline:none;border-color:var(--focus-color);box-shadow:0 0 0 3px #3498db1a}input:disabled{background-color:var(--bg-light);cursor:not-allowed}small{display:block;margin-top:.25rem;color:var(--text-light);font-size:.875rem}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.login-card{background:var(--bg-color);padding:2rem;border-radius:12px;box-shadow:var(--shadow-lg);width:100%;max-width:400px}.login-card h1{text-align:center;margin-bottom:.5rem}.subtitle{text-align:center;color:var(--text-light);margin-bottom:2rem}.dashboard-container{max-width:1200px;margin:0 auto;padding:20px}.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.dashboard-content{display:flex;flex-direction:column;gap:1.5rem}.tier-badge{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:1.5rem;border-radius:12px;display:flex;align-items:center;gap:1rem}.tier-icon{font-size:3rem}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem}.stat-card{background:var(--bg-color);padding:1.5rem;border-radius:12px;box-shadow:var(--shadow);display:flex;align-items:center;gap:1rem}.stat-icon{font-size:2.5rem}.stat-content strong{display:block;font-size:2rem;color:var(--primary-color)}.progress-card{background:var(--bg-color);padding:1.5rem;border-radius:12px;box-shadow:var(--shadow)}.progress-bar{width:100%;height:24px;background-color:var(--bg-light);border-radius:12px;overflow:hidden;margin:1rem 0}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary-color),var(--secondary-color));transition:width .3s}.actions-section{background:var(--bg-color);padding:2rem;border-radius:12px;box-shadow:var(--shadow)}.action-buttons{display:flex;flex-direction:column;gap:1rem;margin-top:1rem}.modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:#00000080;align-items:center;justify-content:center;z-index:1000}.modal-content{background:var(--bg-color);padding:2rem;border-radius:12px;max-width:500px;width:90%;max-height:90vh;overflow-y:auto}.modal-actions{display:flex;gap:1rem;justify-content:flex-end;margin-top:1.5rem}.error-message,.success-message{padding:1rem;border-radius:8px;margin-top:1rem}.error-message{background-color:#fee;color:var(--error-color);border:1px solid var(--error-color)}.success-message{background-color:#efe;color:var(--success-color);border:1px solid var(--success-color)}.rewards-container{max-width:800px;margin:0 auto;padding:20px}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.tiers-list{display:flex;flex-direction:column;gap:1rem}.tier-card{background:var(--bg-color);padding:1.5rem;border-radius:12px;box-shadow:var(--shadow);border:2px solid transparent}.tier-card.achieved{border-color:var(--success-color);background:#f0fdf4}.tier-card.next{border-color:var(--primary-color)}.tier-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.tier-badge{background:var(--primary-color);color:#fff;padding:.5rem 1rem;border-radius:20px;font-weight:600}.achieved-badge{color:var(--success-color);font-weight:600}.landing-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.landing-content{text-align:center;max-width:600px}.landing-message{font-size:1.25rem;margin:1rem 0}.landing-description{color:var(--text-light);margin-bottom:2rem}.error-state{text-align:center;padding:3rem}@media (max-width: 768px){h1{font-size:1.5rem}.stats-grid{grid-template-columns:1fr}.action-buttons{flex-direction:column}.dashboard-header{flex-direction:column;align-items:flex-start;gap:1rem}}.skip-link{position:absolute;top:-40px;left:0;background:var(--primary-color);color:#fff;padding:8px;text-decoration:none;z-index:100}.skip-link:focus{top:0}