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<!doctype html><html lang="en"><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>Capacity reservation — Grommet study</title><style>*{box-sizing:border-box}body{margin:0;background:white;color:#444;font:18px/24px Arial,sans-serif}header{padding:24px 36px;border-bottom:1px solid #ddd;display:flex;gap:12px;align-items:center}.mark{width:22px;height:22px;border:4px solid #7d4cdb;border-radius:50%}main{max-width:1050px;margin:auto;padding:36px}h1{font-size:36px;line-height:42px;margin:12px 0 24px;color:#222}h2{font-size:24px;line-height:30px;margin:0 0 12px}.intro{max-width:650px;margin-bottom:36px}.layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:48px}label{display:block;font-weight:600;margin-bottom:12px}input,select,button{font:inherit;max-width:100%}input[type=text],select{width:100%;border:1px solid #888;border-radius:4px;background:transparent;padding:12px;color:#444}input:focus-visible,select:focus-visible,button:focus-visible{outline:3px solid #6fffb0;outline-offset:3px}.field{margin-bottom:24px}input[type=range]{width:100%;accent-color:#7d4cdb}.limits{display:flex;justify-content:space-between;font-size:14px;color:#666;margin-top:6px}button{border:2px solid #7d4cdb;border-radius:24px;background:#7d4cdb;color:white;padding:10px 24px;font-weight:600;cursor:pointer}button:hover{background:#6839c0}aside{background:#f2f2f2;padding:24px;border-radius:12px;align-self:start;text-align:center}.ring{width:192px;height:192px;border-radius:50%;background:conic-gradient(#7d4cdb var(--used),#dadada 0);margin:24px auto;display:grid;place-items:center;position:relative}.ring:before{content:'';position:absolute;inset:12px;background:#f2f2f2;border-radius:50%}.ring span{position:relative;font-size:36px;font-weight:bold}.ring small{display:block;font-size:14px;font-weight:400;line-height:20px}.legend{text-align:left;border-top:1px solid #ddd;padding-top:12px;font-size:14px}.legend div{display:flex;justify-content:space-between;margin:8px 0}.error{font-size:14px;color:#b30000;margin-top:6px}#result{background:#f2f2f2;border-left:4px solid #7d4cdb;padding:24px;margin-top:36px}footer{font-size:12px;line-height:18px;color:#666;border-top:1px solid #ddd;padding:24px 36px}@media(max-width:700px){main{padding:24px}.layout{grid-template-columns:1fr;gap:24px}h1{font-size:30px;line-height:36px}header,footer{padding:24px}.intro{margin-bottom:24px}}</style><header><span class="mark" aria-hidden="true"></span><strong>Capacity planner</strong></header><main><h1>Plan a reservation</h1><p class="intro">Explore a proposed allocation before preparing a local plan. This model contains 100 capacity units.</p><div class="layout"><form id="form" novalidate><div class="field"><label for="name">Reservation name</label><input id="name" type="text" required aria-describedby="error"><div class="error" id="error" hidden></div></div><div class="field"><label for="pool">Capacity pool</label><select id="pool"><option>Production</option><option>Development</option></select></div><div class="field"><label for="units">Requested allocation: <output id="requested">20</output> units</label><input id="units" type="range" min="5" max="60" step="5" value="20"><div class="limits"><span>5 units</span><span>60 units</span></div></div><button type="submit">Prepare plan</button><p style="font-size:14px;color:#666">No infrastructure will be provisioned.</p></form><aside><h2>Projected usage</h2><div class="ring" id="ring" style="--used:55%" role="img" aria-label="55 of 100 units projected usage"><span><output id="used">55</output><small>of 100 units</small></span></div><div class="legend"><div><span>Already used</span><strong>35</strong></div><div><span>Proposed reservation</span><strong id="proposed">20</strong></div><div><span>Remaining</span><strong id="remaining">45</strong></div></div></aside></div><section id="result" hidden><h2>Prepared local plan</h2><p id="snapshot" role="status"></p><p style="font-size:14px">This snapshot changes only when you prepare the plan again.</p></section></main><footer>Independent base Grommet HTML/CSS interpretation. Base purple/mint palette and spacing; Arial is an application font choice. This is not the separate HPE branded theme.</footer><script>
const $=id=>document.getElementById(id);$('units').oninput=()=>{const units=Number($('units').value),used=35+units;$('requested').textContent=$('proposed').textContent=units;$('used').textContent=used;$('remaining').textContent=100-used;$('ring').style.setProperty('--used',used+'%');$('ring').setAttribute('aria-label',used+' of 100 units projected usage')};$('form').onsubmit=e=>{e.preventDefault();const name=$('name').value.trim();if(name.length<3){$('error').textContent='Use at least three characters for the reservation name.';$('error').hidden=false;$('name').setAttribute('aria-invalid','true');$('name').focus();return}$('error').hidden=true;$('name').removeAttribute('aria-invalid');$('snapshot').textContent=name+' · '+$('pool').value+' · '+$('units').value+' units. Prepared in this local demonstration.';$('result').hidden=false};
</script></html>

// npm install react react-dom grommet styled-components
import React, { useContext, useState } from 'react';
import { createRoot } from 'react-dom/client';
import { Grommet, Box, Heading, Text, Form, FormField, TextInput,
 Select, RangeInput, Meter, Button, ResponsiveContext } from 'grommet';
const theme={global:{font:{family:'Arial, sans-serif',size:'18px',height:'24px'},colors:{brand:'#7D4CDB',focus:'#6FFFB0'}}};
function Planner(){
 const size=useContext(ResponsiveContext);
 const [value,setValue]=useState({name:'',pool:'Production'});
 const [units,setUnits]=useState(20),[plan,setPlan]=useState(null);
 const used=35+units;
 return <Box pad="medium" gap="medium" width={{max:'large'}} margin="auto">
 <Heading level={1} margin="none">Plan a reservation</Heading>
 <Text>Local capacity model. No infrastructure is provisioned.</Text>
 <Box direction={size==='small'?'column':'row'} gap="large">
 <Box flex><Form value={value} onChange={setValue} validate="submit" onSubmit={({value:accepted})=>setPlan({...accepted,units})}>
 <FormField name="name" htmlFor="reservation-name" label="Reservation name" required validate={name=>String(name || '').trim().length<3?'Use at least three characters':undefined}>
 <TextInput name="name" id="reservation-name"/></FormField>
 <FormField name="pool" htmlFor="pool" label="Capacity pool"><Select name="pool" id="pool" options={['Production','Development']}/></FormField>
 <Box gap="small" margin={{vertical:'medium'}}><label htmlFor="units">Requested allocation: {units} units</label>
 <RangeInput id="units" min={5} max={60} step={5} value={units} onChange={event=>setUnits(Number(event.target.value))}/></Box>
 <Button type="submit" primary label="Prepare plan"/>
 </Form></Box>
 <Box align="center" gap="small" pad="medium" background="light-2" round="small">
 <Meter type="circle" value={used} max={100} size="small" thickness="small" color="brand" a11yTitle={`${used} of 100 units projected usage`}/>
 <Text weight="bold">{used} / 100 units used</Text><Text>{100-used} units remaining</Text>
 </Box></Box>
 {plan&&<Box background="light-2" pad="medium" role="status"><Text>Local plan: {plan.name} · {plan.pool} · {plan.units} units</Text></Box>}
 </Box>
}
createRoot(document.getElementById('root')).render(<Grommet theme={theme} themeMode="light" full="min"><Planner/></Grommet>);

// npm install grommet-theme-hpe
import { Grommet } from 'grommet';
import { hpe } from 'grommet-theme-hpe';
// Wrap the Planner from the full setup example:
<Grommet theme={hpe} themeMode="light" full="min"><Planner /></Grommet>

<Select options={[{id:'prod',label:'Production'},{id:'dev',label:'Development'}]}
 labelKey="label" valueKey={{key:'id',reduce:true}}
 value={poolId} onChange={({value})=>setPoolId(value)} />