*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;background:linear-gradient(135deg,#667eea,#764ba2);min-height:100vh}.container{max-width:800px;margin:0 auto;padding:20px}.card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 4px 20px #0000001a;margin-bottom:20px}h1,h2{color:#333;margin-bottom:20px}.form-group{margin-bottom:16px}label{display:block;margin-bottom:6px;font-weight:500;color:#555}input,select,textarea{width:100%;padding:12px;border:2px solid #e0e0e0;border-radius:8px;font-size:16px;transition:border-color .2s}input:focus,select:focus,textarea:focus{outline:none;border-color:#667eea}button{padding:12px 24px;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:transform .1s,box-shadow .2s}button:active{transform:scale(.98)}.btn-primary{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.btn-primary:hover{box-shadow:0 4px 15px #667eea66}.btn-secondary{background:#f0f0f0;color:#333}.btn-danger{background:#ff4757;color:#fff}.btn-small{padding:6px 12px;font-size:14px}.error{color:#ff4757;font-size:14px;margin-top:8px}.task-list{list-style:none}.task-item{display:flex;align-items:center;gap:12px;padding:16px;background:#f8f9fa;border-radius:8px;margin-bottom:12px;transition:transform .2s}.task-item:hover{transform:translate(4px)}.task-item.completed{opacity:.6}.task-item.completed .task-title{text-decoration:line-through}.task-checkbox{width:24px;height:24px;cursor:pointer}.task-content{flex:1}.task-title{font-weight:500;color:#333}.task-meta{font-size:12px;color:#888;margin-top:4px}.priority-badge{padding:4px 8px;border-radius:4px;font-size:12px;font-weight:600}.priority-LOW{background:#e8f5e9;color:#2e7d32}.priority-MEDIUM{background:#fff3e0;color:#ef6c00}.priority-HIGH{background:#ffebee;color:#c62828}.priority-URGENT{background:#c62828;color:#fff}.header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.user-info{color:#fff;display:flex;align-items:center;gap:12px}.auth-container{display:flex;justify-content:center;align-items:center;min-height:100vh}.auth-card{width:100%;max-width:400px}.auth-toggle{text-align:center;margin-top:16px}.auth-toggle a{color:#667eea;cursor:pointer;text-decoration:underline}.flex-gap{display:flex;gap:8px}