:root{--primary-color: #fca311;--bg-color: #f5f5f5;--surface-color: #ffffff;--text-main: #333333;--text-muted: #666666;--success-color: #81c784;--border-color: #e0e0e0;--font-family: "Roboto", sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--bg-color);color:var(--text-main);height:100vh;width:100vw;overflow:hidden;display:flex;flex-direction:column}.card{background-color:var(--surface-color);border-radius:8px;box-shadow:0 4px 6px #0000000d;padding:20px}.flex-center{display:flex;align-items:center;justify-content:center}.flex-row{display:flex;flex-direction:row}.flex-col{display:flex;flex-direction:column}.btn{border:none;border-radius:8px;padding:10px 20px;cursor:pointer;font-weight:500;transition:opacity .2s}.btn:hover{opacity:.9}.btn-success{background-color:var(--success-color);color:#fff}