:root{--primary-color: #1976d2;--secondary-color: #dc004e;--background-color: #f5f5f5;--text-color: #333;--error-color: #f44336;--success-color: #4caf50}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Roboto,sans-serif;line-height:1.6;background-color:var(--background-color);color:var(--text-color)}.container{max-width:1200px;margin:0 auto;padding:0 1rem}.main-content{min-height:calc(100vh - 124px);padding:2rem 0}.card{background:#fff;border-radius:8px;box-shadow:0 2px 4px #0000001a;padding:1.5rem;margin-bottom:1rem}.btn{padding:.5rem 1rem;border:none;border-radius:4px;cursor:pointer;font-weight:500;transition:all .3s ease}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-secondary{background-color:var(--secondary-color);color:#fff}.form-group{margin-bottom:1rem}.form-control{width:100%;padding:.5rem;border:1px solid #ddd;border-radius:4px;font-size:1rem}.alert{padding:1rem;border-radius:4px;margin-bottom:1rem}.alert-error{background-color:var(--error-color);color:#fff}.alert-success{background-color:var(--success-color);color:#fff}@media(max-width:768px){.container{padding:0 .5rem}.main-content{padding:1rem 0}}