:root{--background-color: #ffffff;--primary-blue: #3a7dff;--primary-blue-hover: #5a9bff;--card-background: #ffffff;--border-color: #30363d;--text-color: #c9d1d9;--text-secondary-color: #8b949e;--success-color: #2ea043;--danger-color: #da3633}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji";background-color:var(--background-color);color:var(--text-color);font-size:16px}h1,h2,h3{color:var(--primary-blue);font-weight:300}.container{max-width:1200px;margin:0 auto;padding:2rem}.btn{border:1px solid var(--primary-blue);background-color:transparent;color:var(--primary-blue);padding:10px 20px;font-size:1rem;border-radius:6px;cursor:pointer;transition:all .2s ease-in-out}.btn:hover{background-color:var(--primary-blue-hover);color:var(--background-color);border-color:var(--primary-blue-hover)}.btn-success{border-color:var(--success-color);color:var(--success-color)}.btn-success:hover{background-color:var(--success-color);color:var(--background-color)}