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'Principle' }, { eyebrow: '03 / PHYSICS', title: 'Why Does Airflow Separate the Waste?', short: 'Physics' }, { eyebrow: '04 / MECHANICAL', title: 'Prototype Mechanical Design', short: 'Design' }, { eyebrow: '05 / MECHANISMS', title: 'Two Critical Mechanisms', short: 'Mechanisms' }, { eyebrow: '06 / ELECTRONICS', title: 'Electronic Control System', short: 'Controls' }, { eyebrow: '07 / SOFTWARE', title: 'CSE Integration', short: 'Integration' }, { eyebrow: '08 / TESTING', title: 'How We Measure Performance', short: 'Experiment' }, { eyebrow: '09 / ECONOMICS', title: 'Why Build a Prototype?', short: 'Cost' }, { eyebrow: '10 / BOUNDARIES', title: 'Limitations', short: 'Limits' }, { eyebrow: '11 / SUMMARY', title: 'Final Prototype Concept', short: 'Summary' }, { eyebrow: '12 / INTERACTIVE MODEL', title: 'Interactive 3D Working Model', short: '3D Model' }, ] function Pill({ children }: { children: React.ReactNode }) { return {children} } function SectionTitle({ eyebrow, title, sub }: { eyebrow: string; title: string; sub?: string }) { return

{eyebrow}

{title}

{sub &&

{sub}

}

} function FlowArrow() { return

} function ObjectDots({ pile = false }: { pile?: boolean }) { return

{Array.from({ length: pile ? 9 : 7 }).map((_, i) => )}

} type DemoItem = { id: number; kind: 'light' | 'heavy'; status: 'hopper' | 'ramp' | 'air' | 'heavyBin' | 'lightBin' } function Hero() { const [fanSpeed, setFanSpeed] = useState(64), [vibration, setVibration] = useState(52), [angle, setAngle] = useState(30), [dropCount, setDropCount] = useState(10) const [running, setRunning] = useState(false), [items, setItems] = useState([]), [explanation, setExplanation] = useState('Click a mechanical component for a quick explanation.') const release = () => { setRunning(true); setItems(Array.from({ length: dropCount }, (_, id) => ({ id, kind: id % 3 === 0 ? 'heavy' : 'light', status: 'hopper' }))) } const start = release const reset = () => { setRunning(false); setItems([]); setFanSpeed(64); setVibration(52); setAngle(30); setDropCount(10) } useEffect(() => { if (!running) return const timer = window.setInterval(() => setItems(current => current.map(item => { const feed = Math.min(1, .08 + vibration / 180 + (angle - 20) / 55) if (item.status === 'hopper' && Math.random() < feed) return { ...item, status: 'ramp' } if (item.status === 'ramp' && Math.random() < feed) return { ...item, status: 'air' } if (item.status === 'air') return { ...item, status: item.kind === 'light' && fanSpeed > 18 ? 'lightBin' : 'heavyBin' } return item })), Math.max(180, 1100 - vibration * 6 - (angle - 20) * 24)) return () => window.clearInterval(timer) }, [running, vibration, angle, fanSpeed]) const counts = { total: items.length, heavy: items.filter(i => i.status === 'heavyBin').length, light: items.filter(i => i.status === 'lightBin').length } const explain = (text: string) => () => setExplanation(text) const controls = [['FAN SPEED', fanSpeed, setFanSpeed, '%'], ['VIBRATION STRENGTH', vibration, setVibration, '%'], ['RAMP ANGLE', angle, setAngle, '°']] as const return

ENGINEERING PROJECT / 2026

Low-Cost
Vibratory Slide
+ Air Classifier

A compact prototype for lightweight and heavy waste separation.

VIBRATORY FEEDING→CONTROLLED AIRFLOW→TWO-FRACTION SEPARATION

TEAM MEMBERS: DIVYAJYOTI · VANSH · SAKSHI · SHAHID

01 / HOPPER

02 / VIBRATING RAMP

03 / FAN

04 / COLLECTION

{items.map(item => )}

→→→
HEAVY
WET{counts.heavy}
LIGHTWEIGHT
DRY{counts.light}

{controls.map(([label, value, setter, unit]) => {label}{value}{unit} setter(+e.target.value)} />)}
TOTAL ITEMS {counts.total}HEAVY / WET {counts.heavy}LIGHT / DRY {counts.light}
{explanation}
CONCEPTUAL SIMULATION — ILLUSTRATIVE, NOT EXPERIMENTAL DATA

} function Problem() { const [vibrating, setVibrating] = useState(true) return
01 / PILE FEED
Objects overlap.
Airflow affects multiple objects together
Separation becomes inconsistent
02 / CONTROLLED FEED
Objects spread out.
Objects reach the airflow individually
More consistent trajectories
} function Principle() { return
01
▦
WASTEmixed input
02
⌂
HOPPERbuffered supply
03
／
VIBRATING RAMPcontrolled feed
04
AIRFLOWtrajectory shift
05
▥
TWO BINStwo fractions
LIGHTWEIGHT / HIGH AREA-TO-MASS
→ LIGHTWEIGHT / DRY FRACTION
HEAVY / LOW AREA-TO-MASS
→ HEAVY / WET FRACTION
} function Physics() { const [kind, setKind] = useState<'wrapper' | 'scrap'>('wrapper'); return
WEIGHTW = m × gMass multiplied by gravitational acceleration.
AIR DRAGFᴅ = ½ × ρ × Cᴅ × A × v²Drag rises with area and the square of air velocity.
KEY RELATIONSHIPSeparation depends strongly on
surface-area-to-mass ratio.
{kind === 'wrapper' ? 'TRAVELS FARTHER' : 'FALLS CLOSER'}
{kind === 'wrapper' ? 'CHIP WRAPPER' : 'FOOD SCRAP'}
{kind === 'wrapper' ? 'More affected by airflow' : 'Less affected by airflow'}
{kind === 'wrapper' ? 'Low mass and relatively large surface area make the wrapper more responsive to the fan.' : 'Higher mass and a lower area-to-mass ratio make the scrap drop closer to the ramp.'}
} function Mechanical() { return
1
2
~40 cm × 20 cm
4
7
5
HEAVY / WET
6
LIGHTWEIGHT / DRY
3
VIBRATION MOTOR
30–35°
{[['01','Hopper','Buffered input'],['02','Vibrating ramp','~40 cm × 20 cm'],['03','Vibration motor','Under-ramp drive'],['04','Fan / blower','Horizontal airflow'],['05','Heavy / Wet bin','Closer drop zone'],['06','Lightweight / Dry bin','Farther trajectory'],['07','Divider','Two-fraction split']].map(([n,t,d]) =>
{n}
{t}{d}
)}
SIDE WALLS ~3 cmRAMP ANGLE ~30–35°DRY-BIN DISTANCE ~25–30 cm
} function Mechanisms() { const [vibration, setVibration] = useState(52); const [fan, setFan] = useState(64); return
01 / VIBRATORY FEEDER
Controls material flow.
Spreads objects and prevents large piles from entering the classifier together.
VIBRATION STRENGTH{vibration}%
setVibration(+e.target.value)} />
LOWHIGH
02 / AIR CLASSIFIER
Changes object trajectory.
Applies horizontal airflow to sort by aerodynamic behavior, not by material name.
FAN SPEED{fan}%
setFan(+e.target.value)} />
LOWHIGH
} function Electronics() { return
12V ADAPTER
POWER DISTRIBUTION
FAN / BLOWER
BUCK CONVERTER
VIBRATION MOTOR
ENHANCED CONTROL LAYER
ARDUINO
↓
PWM CONTROL
↙ FAN SPEED↘ VIBRATION STRENGTH
} function Integration() { return
{[['01','PWM CONTROL','Software-controlled fan and vibration speed.','◒'],['02','SENSOR COUNTING','IR sensors count objects entering each bin.','⌁'],['03','DATA LOGGING','Fan speed · vibration · items · accuracy','▤'],['04','DASHBOARD','Total items · fractions · sorting accuracy','▦']].map(([n,t,d,icon]) =>
{n}
{icon}
{t}
{d}
)}
SENSORS→ARDUINO→DATA→DASHBOARD
} function Experiment() { const [fan, setFan] = useState(55), [angle, setAngle] = useState(32), [vibration, setVibration] = useState(48), [running, setRunning] = useState(false) const performance = Math.round(Math.min(99, 38 + fan * .3 + vibration * .18 + (angle - 20) * .8)) const bars = Array.from({ length: 7 }, (_, i) => Math.max(12, Math.round(performance * (.58 + i * .055)))) const reset = () => { setFan(55); setAngle(32); setVibration(48); setRunning(false) } return
TEST PROTOCOL
10 + 10 sample
10 Lightweight/Dry + 10 Heavy/Wet
3 repeated trials
{[['Fan Speed', fan, setFan, ' %', 0, 100],['Ramp Angle', angle, setAngle, '°', 20, 40],['Vibration Strength', vibration, setVibration, ' %', 0, 100]].map(([label,val,setter,unit,min,max]) => {label as string}{val as number}{unit as string} { setRunning(false); (setter as (x:number)=>void)(+e.target.value) }} />)}
CONCEPTUAL ACCURACY{performance}%Illustrative response from selected settings
SIMULATED THROUGHPUT{Math.round(8 + vibration / 9 + (angle - 20) / 2)}/minNot a measured experimental result
CONCEPTUAL SIMULATION / LIVE RESPONSE
SELECTED CONTROLVALUERESPONSEFAN SPEED{fan}%{fan > 60 ? 'Stronger airflow' : 'Gentler airflow'}RAMP ANGLE{angle}°{angle > 30 ? 'Faster descent' : 'Slower descent'}VIBRATION{vibration}%{vibration > 60 ? 'Faster feeding' : 'Gentler feeding'}
SIMULATED SORTING PERFORMANCE{running ? 'RUNNING' : 'LIVE PREVIEW'}
{bars.map((height, i) =>
)}
LOWSELECTED CONTROL →HIGH
CONCEPTUAL SIMULATION — GRAPH RESPONDS TO FAN SPEED, VIBRATION STRENGTH AND RAMP ANGLE; NOT REAL EXPERIMENTAL DATA.
} function Cost() { const rows = [['Approx. Price','₹56,000','₹2,000–₹2,500'],['Type','Commercial air classifier','Educational prototype'],['Air Separation','✓','✓'],['Compact Form','✓','✓'],['Vibratory Feeding','Product dependent','✓'],['Adjustable Ramp Angle','Product dependent','✓'],['Adjustable Fan Speed','Product dependent','✓'],['Adjustable Vibration','Product dependent','✓'],['Particle Number Control','Not the focus','✓'],['Interactive Controls','Not the focus','✓'],['Sensors','Model dependent','Optional'],['Data Visualization','Not the main focus','✓'],['Main Goal','Commercial separation','Low-cost demonstration + experimentation']] as const; return
COMPACT COMMERCIAL PRODUCT
AIR
CLASSIFIER
APPROX. PRICE₹56,000
Capacity: 10 kg
Listed throughput: up to 500 kg/hr
Commercial air-based separation
Example of a compact commercial air-classification product available online. Price and specifications vary by model.
OUR PROTOTYPEESTIMATED BUILD COST₹2,000–2,500
Vibratory feeding ramp
Adjustable ramp angle, fan speed and vibration strength
User-controlled particles and airflow-based separation
Heavy/Wet and Lightweight/Dry collection
Arduino/control electronics, optional sensors
Interactive simulation and real-time visual feedback
{rows.map(([feature, product, prototype]) => )}
FEATURE COMPACT COMMERCIAL PRODUCT OUR PROTOTYPE
{feature} {product} {prototype}
KEY DIFFERENCE
WHAT WE ARE CHANGING
COMMERCIAL PRODUCT→ Ready-made separation machine→ Commercial construction→ Higher cost
OUR PROTOTYPE→ Low-cost construction→ Adjustable parameters→ Visible trajectories + interactive learning→ CSE + mechanical integration
Rather than simply copying an existing machine, our project converts the air-classification principle into a low-cost, adjustable and interactive tabletop prototype.
Commercial price based on an online Indian listing; specifications and pricing may vary. This comparison does not imply equal throughput, durability or commercial performance.
} function Limitations() { const limits = ['The system separates primarily according to aerodynamic behavior, not directly according to moisture.','Wet paper/tissue may behave unpredictably.','Heavy dry objects can enter the heavy fraction.','Small fans have limited airflow.','Object size and shape affect separation.','The system creates two fractions rather than fully identifying plastic, paper and metal.']; return
{limits.map((x,i) =>
0{i+1}
{x}
)}
OPTIONAL ENHANCEMENTMoisture sensing can improve wet/dry verification.
} function Summary() { return
HOPPER
↓
VIBRATING RAMP
↓
CONTROLLED FEEDING
↓
ADJUSTABLE AIRFLOW
↙HEAVY / WETIR SENSOR
↘LIGHT / DRYIR SENSOR
↘ ARDUINO ↙
↓
DATA LOGGING / DASHBOARD
COMPACTLOW-COSTCONTROLLED FEEDINGADJUSTABLE AIRFLOWSENSOR-BASED MEASUREMENT
“A simple industrial separation principle, redesigned as a compact educational prototype.”
} type SimSettings = { particles: number; fan: number; vibration: number; angle: number; weight: number; size: number; direction: number; running: boolean; dropped: boolean } function MachineScene({ settings, onSelect }: { settings: SimSettings; onSelect: (text: string) => void }) { const group = useRef(null) const phase = useRef(0) const items = useMemo(() => Array.from({ length: settings.particles }, (_, i) => ({ light: i % 3 !== 0, seed: i * 1.71 })), [settings.particles]) const rampAngle = THREE.MathUtils.degToRad(settings.angle - 30) useFrame((_, delta) => { phase.current += delta * (settings.running ? .7 + settings.vibration / 38 : .08); if (group.current) group.current.position.y = Math.sin(phase.current * 5) * settings.vibration / 900 }) const metal = '#71807b', dark = '#24302d', lime = '#d6ef3f' return onSelect('The bolted steel frame supports the feed path, blower bracket, and collection zones.')}> {[-3.9, 3.9].flatMap(x => [-1.45, 1.45].map(z => ))} {[-2.4, 2.4].map(x => )} onSelect('The hopper buffers mixed waste above the ramp and meters it through a narrow outlet.') }> {[-.25, 0, .25].map((x, i) => )} onSelect('The inclined tray rotates around its hinge as Ramp Angle changes. Vibration motor mounts underneath.') }> {[-1, 1].map(z => )} {[-2, -1, 0, 1, 2].map(x => )} onSelect('The air classifier sits at the ramp exit; fan speed changes blade rotation, airflow, and particle reach.') }> {[0, 1, 2].map(i => )} {[-1.25, 1.25].map((z, i) => onSelect(i ? 'The far tray collects lightweight dry items carried farther by airflow.' : 'The near tray collects heavier wet items that resist airflow.') }> {[-.55, .55].map(x => )} )} {items.map((item, i) => { const t = settings.dropped ? (phase.current * (.12 + settings.vibration / 500) + item.seed) % 1 : 0; const airflowResponse = Math.max(.25, 1 - settings.weight / 125) * (1 - settings.size / 260); const travel = item.light ? 7.3 + settings.fan / 16 : 4.6 + settings.fan / 45; const x = -2.6 + t * travel * airflowResponse * settings.direction; const y = .58 + Math.sin(t * Math.PI) * .6 - t * 1.5 + Math.sin(item.seed + phase.current * 2) * .04; const z = ((i % 5) - 2) * .28; return onSelect(item.light ? 'This lightweight particle follows a longer curved trajectory through the airflow.' : 'This heavy particle resists airflow and lands in the near tray.')}> })} {Array.from({ length: 7 }).map((_, i) => )} } function Simulation3D() { const [s, setS] = useState({ particles: 10, fan: 62, vibration: 48, angle: 30, weight: 45, size: 45, direction: 1, running: false, dropped: false }) const [note, setNote] = useState('Click a machine component for an explanation.') const update = (key: keyof SimSettings, value: number) => setS(prev => ({ ...prev, [key]: value })) const heavy = Math.round(s.particles * (1 - s.fan / 180 + s.weight / 240)), dry = s.particles - heavy const efficiency = Math.round(Math.min(98, 45 + s.fan * .25 + s.vibration * .15 + (s.angle - 15) * .45)) const controls: [keyof SimSettings, string, number, number, string][] = [['particles', 'NUMBER OF ITEMS TO DROP', 1, 50, ''], ['fan', 'FAN SPEED', 0, 100, '%'], ['vibration', 'VIBRATION STRENGTH', 0, 100, '%'], ['angle', 'RAMP ANGLE', 15, 45, '°'], ['weight', 'PARTICLE WEIGHT', 0, 100, ''], ['size', 'PARTICLE SIZE', 0, 100, '']] return
FEEDVIBRATORY RAMPAIRFLOWSEPARATIONBINS
{controls.map(([key, label, min, max, unit]) => {label}{s[key] as number}{unit} update(key, +e.target.value)} />)}AIRFLOW DIRECTION{s.direction > 0 ? '→' : '←'} update('direction', +e.target.value)} />
PARTICLES{s.particles}
FAN SPEED{s.fan}%
HEAVY / WET{heavy}
LIGHT / DRY{dry}
SEPARATION EFFICIENCY{efficiency}%
COMPONENT NOTE{note}
Interactive 3D Conceptual Simulation — Parameters are adjustable for demonstration. Simulated values are illustrative, not real experimental data.
} export default function Home() { const [slide, setSlide] = useState(0); const [full, setFull] = useState(false) const next = () => setSlide(s => Math.min(s + 1, slides.length - 1)); const prev = () => setSlide(s => Math.max(s - 1, 0)) useEffect(() => { const onKey = (e: KeyboardEvent) => { if (e.key === 'ArrowRight' || e.key === ' ') next(); if (e.key === 'ArrowLeft') prev(); if (e.key.toLowerCase() === 'f') setFull(v => !v) }; window.addEventListener('keydown', onKey); return () => window.removeEventListener('keydown', onKey) }, []) const view = useMemo(() => [, , , , , , , , , , ,
, ][slide], [slide]) return
VS
VIBRATORY SLIDEAIR CLASSIFIER / PROJECT 01
LIVE DEMO
{view}
{String(slide + 1).padStart(2, '0')}/{String(slides.length).padStart(2, '0')}{slides[slide].short}
←→ TO NAVIGATE F FULLSCREEN
} [V0_FILE]css:file="/app/globals.css" @import 'tailwindcss'; @import 'tw-animate-css'; @import 'shadcn/tailwind.css'; @custom-variant dark (&:is(.dark *)); :root { color-scheme: light; --background:#f4f3ef; --foreground:#18201f; --muted:#737a78; --line:#d7d9d2; --accent:#d6ef3f; --accent-dark:#839400; --ink:#18201f; --card:#fbfbf8; --radius:12px; } @theme inline { --color-background:var(--background); --color-foreground:var(--foreground); --color-card:var(--card); --color-card-foreground:var(--foreground); --color-border:var(--line); --color-muted-foreground:var(--muted); --color-primary:var(--ink); --color-primary-foreground:#fff; --color-accent:var(--accent); --radius-lg:var(--radius); } * { box-sizing:border-box; } body { margin:0; background:var(--background); color:var(--ink); font-family:Arial, Helvetica, sans-serif; } button,input { font:inherit; } button { cursor:pointer; } .presentation { min-height:100vh; display:flex; flex-direction:column; overflow:hidden; background:var(--background); } .presentation.fullscreen { position:fixed; inset:0; z-index:20; } .topbar { height:76px; flex:none; display:flex; align-items:center; justify-content:space-between; padding:0 4vw; border-bottom:1px solid var(--line); } .brand-mark { display:flex; gap:12px; align-items:center; letter-spacing:.06em; } .brand-mark > span { width:32px; height:32px; display:grid; place-items:center; color:var(--ink); background:var(--accent); font-size:11px; font-weight:800; border-radius:50%; } .brand-mark strong,.brand-mark small { display:block; }.brand-mark strong { font-size:11px; }.brand-mark small { font-size:8px; color:var(--muted); letter-spacing:.12em; margin-top:3px; } .top-actions { display:flex; align-items:center; gap:9px; font-size:9px; letter-spacing:.14em; color:var(--muted); }.top-actions button { border:0; background:none; padding:8px; color:var(--ink); }.top-actions svg { width:17px; }.status-dot { width:7px; height:7px; border-radius:50%; background:var(--accent-dark); box-shadow:0 0 0 4px #e6edc0; }.live-label { margin-right:12px; } .progress { height:3px; background:#e8e9e3; flex:none; }.progress span { display:block; height:100%; background:var(--accent-dark); transition:width .45s ease; } .slide-viewport { flex:1; overflow:auto; }.slide-key { min-height:calc(100vh - 137px); animation:slideIn .38s ease both; }@keyframes slideIn { from{opacity:0;transform:translateX(16px)} to{opacity:1;transform:none} } .hero-slide,.content-slide { max-width:1240px; margin:auto; width:100%; min-height:calc(100vh - 137px); padding:clamp(34px,5vw,76px) 5vw; }.hero-slide { display:grid; grid-template-columns:1fr 1fr; align-items:center; gap:4vw; }.hero-copy h1 { font-size:clamp(42px,5.3vw,82px); line-height:.94; letter-spacing:-.07em; max-width:650px; margin:22px 0 24px; font-weight:750; }.hero-copy h1 em { color:var(--accent-dark); font-style:normal; }.hero-sub { max-width:370px; color:var(--muted); line-height:1.45; font-size:16px; }.pill { display:inline-block; color:var(--muted); font-size:9px; letter-spacing:.16em; font-weight:700; }.hero-chain { display:flex; align-items:center; gap:13px; margin-top:42px; font-size:9px; letter-spacing:.12em; font-weight:700; flex-wrap:wrap; }.hero-chain b { color:var(--accent-dark); font-size:17px; }.team { margin-top:56px; font-size:9px; color:var(--muted); letter-spacing:.12em; }.team strong { color:var(--ink); }.machine-wrap { position:relative; min-height:430px; display:grid; place-items:center; }.machine { position:relative; width:min(100%,520px); height:330px; border-bottom:7px solid #27312e; }.hopper { position:absolute; left:5%; top:20px; width:100px; height:92px; background:#d8dbd1; clip-path:polygon(0 0,100% 0,72% 100%,28% 100%); display:grid; place-items:center; }.ramp { position:absolute; left:22%; top:140px; width:58%; height:24px; background:#283330; transform:rotate(7deg); border-radius:3px; }.ramp-ribs { position:absolute; inset:5px 8px; background:repeating-linear-gradient(90deg,#9aa39c 0 2px,transparent 2px 15px); opacity:.5; }.moving-objects i { position:absolute; width:12px; height:12px; border-radius:3px; background:var(--accent); top:-7px; animation:moveObj 2.4s linear infinite; }.moving-objects i:nth-child(1){left:15%;}.moving-objects i:nth-child(2){left:43%;animation-delay:.7s}.moving-objects i:nth-child(3){left:68%;animation-delay:1.4s}@keyframes moveObj { from{transform:translateX(0)} to{transform:translateX(170px)} } .fan { position:absolute; left:27%; top:190px; color:var(--accent-dark); }.fan svg { width:42px; height:42px; animation:spin 2s linear infinite; }@keyframes spin{to{transform:rotate(360deg)}}.air-lines { position:absolute; left:38%; top:205px; display:flex; gap:20px; color:var(--accent-dark); font-size:28px; animation:air 1s linear infinite; }.air-lines span:nth-child(2){animation-delay:.2s}.air-lines span:nth-child(3){animation-delay:.4s}@keyframes air{50%{transform:translateX(8px);opacity:.4}} .bin { position:absolute; bottom:0; width:125px; height:93px; padding:14px 9px; font-size:10px; letter-spacing:.1em; font-weight:800; line-height:1.3; text-align:center; background:#d8dbd1; border:2px solid #26312e; border-bottom:0; }.bin small { color:var(--muted); font-size:8px; }.bin.heavy{left:35%;}.bin.light{right:2%; background:var(--accent);}.motor { position:absolute; left:48%; bottom:-31px; color:#27312e; }.motor svg{width:34px;}.machine-label { position:absolute; font-size:8px; color:var(--muted); letter-spacing:.12em; }.label-hopper{left:0;top:76px}.label-ramp{left:28%;top:123px}.label-fan{left:21%;top:278px}.label-bins{right:0;bottom:48px} .section-heading { margin-bottom:32px; }.section-heading h1 { font-size:clamp(34px,4.3vw,61px); line-height:.98; letter-spacing:-.065em; margin:14px 0 10px; max-width:780px; }.section-heading p { color:var(--muted); max-width:600px; line-height:1.5; margin:0; font-size:14px; } .toggle-row { display:flex; gap:7px; margin-bottom:20px; }.toggle-row button { border:1px solid var(--line); background:transparent; color:var(--muted); padding:10px 14px; font-size:9px; letter-spacing:.1em; }.toggle-row button.active { background:var(--ink); color:white; border-color:var(--ink); }.compare-grid,.mechanism-grid,.cost-grid { display:grid; grid-template-columns:1fr 1fr; gap:18px; }.compare-card,.mechanism-card,.cost-card { background:var(--card); border:1px solid var(--line); padding:25px; border-radius:var(--radius); }.compare-card.selected { border-color:var(--accent-dark); box-shadow:inset 0 3px var(--accent); }.card-kicker { color:var(--muted); font-size:9px; letter-spacing:.14em; }.compare-card h2,.mechanism-card h2 { font-size:26px; letter-spacing:-.04em; margin:10px 0; }.visual-feed { height:128px; margin:20px 0; background:#eef0e9; display:grid; place-items:center; position:relative; overflow:hidden; }.object-dots { display:flex; gap:22px; align-items:center; }.object-dots span { width:17px;height:17px;border-radius:50%;background:var(--accent-dark);box-shadow:inset -4px -4px #667100; }.object-dots.pile { width:100px; display:flex; flex-wrap:wrap; gap:6px; justify-content:center; }.object-dots.pile span { width:21px;height:21px; }.compare-card ul { padding-left:18px; color:var(--muted); font-size:12px; line-height:1.8; margin:0; } .process-row { display:flex; align-items:center; gap:10px; }.process-node { background:var(--card); border:1px solid var(--line); padding:15px 12px; flex:1; min-width:100px; position:relative; }.process-node.active { border-color:var(--accent-dark); box-shadow:inset 0 3px var(--accent); }.process-node span { font-size:8px;color:var(--muted); }.node-icon { height:48px; display:grid; place-items:center; font-size:28px; color:var(--accent-dark); }.node-icon svg { width:28px; }.process-node strong,.process-node small { display:block; }.process-node strong { font-size:10px; }.process-node small { font-size:9px; color:var(--muted); margin-top:4px; }.flow-arrow { color:var(--muted); }.flow-arrow svg { width:18px; }.trajectory-card { margin-top:28px; background:#1f2926; color:#fff; border-radius:var(--radius); padding:24px; display:grid; gap:18px; }.trajectory-line { display:grid; grid-template-columns:210px 1fr 190px; gap:15px; align-items:center; font-size:10px; }.trajectory-label { letter-spacing:.08em; font-size:9px; }.light-label{color:var(--accent)}.heavy-label{color:#b9c0bc}.dashed-trajectory { border-top:2px dashed var(--accent); position:relative; }.dashed-trajectory:after{content:'›';position:absolute;right:0;top:-15px;color:var(--accent);font-size:25px}.heavy-traj{border-color:#9ba49e;width:55%}.trajectory-line strong{font-size:10px;letter-spacing:.08em} .formula-grid { display:grid; grid-template-columns:1fr 1.35fr 1.2fr; gap:14px; }.formula-card,.ratio-callout { padding:22px; background:var(--card); border:1px solid var(--line); border-radius:var(--radius); }.formula-card span,.ratio-callout span { display:block; font-size:9px; color:var(--muted); letter-spacing:.12em; }.formula-card b { display:block; font-family:Georgia,serif; font-size:25px; margin:18px 0 10px; letter-spacing:-.04em; }.formula-card small { color:var(--muted); font-size:11px; line-height:1.4; }.accent-card { background:var(--accent); border-color:var(--accent); }.accent-card span,.accent-card small{color:#556000}.ratio-callout { background:#1f2926; color:#fff; }.ratio-callout strong { display:block; font-size:18px; line-height:1.3; margin-top:20px; }.ratio-callout em { color:var(--accent); font-style:normal; }.physics-interaction { margin-top:22px; display:grid; grid-template-columns:220px 1fr 220px; align-items:stretch; gap:16px; }.choice-list { display:flex; flex-direction:column; gap:7px; }.choice-list button { border:1px solid var(--line); background:var(--card); display:grid; grid-template-columns:25px 1fr; grid-template-rows:1fr 1fr; text-align:left; padding:13px; font-size:10px; letter-spacing:.08em; }.choice-list button.selected { border-color:var(--accent-dark); background:#eef4cf; }.choice-list small { grid-column:2; color:var(--muted); font-size:9px; letter-spacing:0; }.sample { grid-row:1 / span 2; width:19px;height:19px; border-radius:4px; background:#c8d83e; align-self:center; }.sample.scrap{border-radius:50%;background:#8a7657}.trajectory-stage { position:relative; min-height:145px; overflow:hidden; background:#1f2926; border-radius:var(--radius); color:var(--accent); }.trajectory-stage > svg { position:absolute; top:47%; left:14%; width:23px; animation:float 1s infinite alternate }.physics-object { position:absolute; top:46%; left:42%; width:21px;height:21px;background:var(--accent);border-radius:4px; }.physics-object.scrap{background:#a28a67;border-radius:50%}.physics-path { position:absolute; left:42%; top:46%; width:45%; height:55px; border-top:2px dashed var(--accent); border-radius:50%; transform:rotate(-13deg); }.physics-path.scrap{height:20px;transform:rotate(12deg);width:25%;border-color:#aab2ad}.trajectory-note { position:absolute; right:10px; bottom:12px; font-size:9px; letter-spacing:.13em; }.physics-detail { border:1px solid var(--line); background:var(--card); padding:18px; }.physics-detail h3 { font-size:17px; margin:18px 0 8px; }.physics-detail p { color:var(--muted); font-size:11px; line-height:1.5; margin:0; } .mechanical-layout { display:grid; grid-template-columns:1.2fr 1fr; gap:18px; }.side-diagram { height:300px; position:relative; background:#1f2926; border-radius:var(--radius); color:#fff; overflow:hidden; }.diagram-hopper{position:absolute;left:10%;top:35px;width:80px;height:80px;clip-path:polygon(0 0,100% 0,70% 100%,30% 100%);background:#79837d;padding:9px;color:var(--accent);font-size:10px}.mini-dots{position:absolute;bottom:15px;left:25px;width:28px;height:24px;background:radial-gradient(circle,var(--accent) 0 4px,transparent 5px);background-size:12px 12px}.diagram-ramp{position:absolute;left:22%;top:132px;width:50%;height:23px;background:#aab2ad;transform:rotate(7deg);color:#1f2926;padding:4px 8px;font-size:9px}.ramp-measure{position:absolute;top:30px;left:32%;color:#b4bdb7;transform:rotate(-7deg)}.diagram-fan{position:absolute;left:25%;top:194px;color:var(--accent);font-size:10px}.diagram-fan svg{display:block;width:28px;animation:spin 2s linear infinite}.diagram-divider{position:absolute;right:30%;bottom:58px;border-left:2px solid var(--accent);height:55px;color:var(--accent);padding-left:5px}.diagram-bin{position:absolute;bottom:0;height:65px;width:120px;border:1px solid #64706a;border-bottom:0;padding:8px;color:var(--accent);font-size:10px}.diagram-bin small{color:#b4bdb7}.bin-a{right:32%}.bin-b{right:2%}.diagram-motor{position:absolute;bottom:18px;left:46%;font-size:10px;color:var(--accent)}.diagram-motor small{display:block;color:#b4bdb7}.angle{position:absolute;left:21%;top:175px;color:var(--accent);font-size:10px}.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.spec{display:flex;gap:10px;border-bottom:1px solid var(--line);padding:9px 0}.spec > span,.card-number{font-size:9px;color:var(--accent-dark);font-weight:bold}.spec strong,.spec small{display:block}.spec strong{font-size:11px}.spec small{font-size:9px;color:var(--muted);margin-top:4px}.dimension-strip{display:flex;gap:8px;margin-top:15px}.dimension-strip span{flex:1;background:var(--accent);padding:13px 15px;font-size:9px;letter-spacing:.08em}.dimension-strip b{display:block;font-size:14px;margin-top:5px;letter-spacing:0} .mechanism-card{position:relative}.mechanism-icon{position:absolute;right:22px;top:21px;color:var(--accent-dark)}.mechanism-icon svg{width:26px}.mechanism-card p{color:var(--muted);font-size:12px;line-height:1.5;max-width:380px}.slider-label{display:flex;justify-content:space-between;font-size:9px;letter-spacing:.12em;margin-top:25px}.slider-label b{font-size:12px;letter-spacing:0;color:var(--accent-dark)}input[type=range]{width:100%;accent-color:var(--accent-dark);margin-top:9px}.range-ends{display:flex;justify-content:space-between;color:var(--muted);font-size:8px;letter-spacing:.1em}.mini-animation,.fan-animation{height:45px;background:#eef0e9;margin-top:18px;display:flex;align-items:center;justify-content:center;gap:25px;overflow:hidden}.mini-animation i{display:block;width:13px;height:13px;background:var(--accent-dark);border-radius:3px;animation:slideObj var(--speed) linear infinite}.fan-animation svg{width:19px;animation:float 1.1s ease-in-out infinite alternate}.fan-animation svg:nth-child(2){animation-delay:.2s}.fan-animation svg:nth-child(3){animation-delay:.4s}.fan-animation svg:nth-child(4){animation-delay:.6s}@keyframes slideObj{from{transform:translateX(-70px)}to{transform:translateX(70px)}}@keyframes float{to{transform:translateX(12px)}} .electrical-board{background:var(--card);border:1px solid var(--line);min-height:370px;border-radius:var(--radius);padding:30px;position:relative;display:flex;align-items:flex-start;justify-content:center;gap:24px}.power-node{border:1px solid var(--line);padding:14px 18px;font-size:10px;letter-spacing:.1em;background:#fff}.power-node.root{background:var(--accent);border-color:var(--accent)}.distribution{position:absolute;top:90px}.power-line.down{position:absolute;top:63px;height:27px;border-left:1px dashed var(--accent-dark)}.branch{position:absolute;top:160px;display:flex;flex-direction:column;align-items:center;gap:12px}.branch-left{left:19%}.branch-right{right:19%}.branch .power-line{height:28px;border-left:1px dashed var(--accent-dark)}.control-layer{position:absolute;left:6%;right:6%;bottom:24px;background:#1f2926;color:#fff;padding:18px;display:flex;align-items:center;gap:18px}.control-label{font-size:8px;color:#aab2ad;letter-spacing:.12em;position:absolute;top:8px}.arduino,.pwm{background:var(--accent);color:var(--ink);padding:12px;font-size:10px;letter-spacing:.1em;margin-top:8px}.control-arrow{color:var(--accent);margin-top:8px}.pwm-branches{display:flex;gap:38px;color:var(--accent);font-size:15px;margin-top:8px}.pwm-branches b{font-size:9px;color:#fff;letter-spacing:.08em} .integration-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.integration-card{background:var(--card);border:1px solid var(--line);padding:18px;min-height:175px;position:relative}.integration-icon{font-size:32px;color:var(--accent-dark);margin:26px 0 18px}.integration-card h2{font-size:13px;margin:0 0 8px;letter-spacing:.03em}.integration-card p{font-size:10px;color:var(--muted);line-height:1.4;margin:0}.data-flow{display:flex;justify-content:center;gap:24px;align-items:center;margin-top:30px;font-size:10px;letter-spacing:.12em}.data-flow b{font-size:20px;color:var(--accent-dark)} .experiment-layout{display:grid;grid-template-columns:280px 1fr;gap:18px}.experiment-controls,.metrics{background:var(--card);border:1px solid var(--line);padding:23px}.experiment-controls h2{font-size:25px;letter-spacing:-.04em;margin:14px 0 5px}.experiment-controls p{font-size:11px;color:var(--muted);line-height:1.5;margin-bottom:23px}.experiment-controls label{display:block;border-top:1px solid var(--line);padding:14px 0}.experiment-controls label span{display:flex;justify-content:space-between;font-size:10px}.experiment-controls label b{color:var(--accent-dark)}.metrics{display:grid;grid-template-columns:1fr 1fr;gap:12px}.metric{border:1px solid var(--line);padding:17px}.metric span{font-size:9px;letter-spacing:.1em;color:var(--muted)}.metric strong{display:block;font-size:32px;margin:17px 0}.metric small{font-size:9px;color:var(--muted)}.matrix{grid-column:1 / -1;margin-top:5px}.matrix-table{display:grid;grid-template-columns:1.5fr 1fr 1fr;margin-top:12px;font-size:9px;text-align:center}.matrix-table>*{padding:10px;border:1px solid var(--line);margin:-1px 0 0 -1px}.matrix-table span{color:var(--muted);font-size:8px}.matrix-table i{font-style:normal;background:#eef4cf;color:#5d6700}.graph-note{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:18px}.graph-note span{border:1px solid var(--line);height:76px;padding:12px;font-size:9px;letter-spacing:.08em;background:linear-gradient(165deg,transparent 49%,#dce1d4 50%,transparent 51%)}.graph-note b{grid-column:1/-1;text-align:center;color:var(--muted);font-size:9px;font-weight:normal} .cost-grid{align-items:center;grid-template-columns:1fr 70px 1fr}.cost-card strong{display:block;font-size:clamp(40px,5vw,70px);letter-spacing:-.08em;margin:18px 0}.cost-card strong span{color:var(--accent-dark)}.cost-card ul{padding-left:17px;color:var(--muted);line-height:1.7;font-size:11px}.commercial{background:#e2e4de}.prototype{background:var(--accent);border-color:var(--accent)}.cost-vs{font-size:11px;text-align:center;font-weight:bold}.cost-footnote{text-align:center;color:var(--muted);font-size:11px;margin-top:18px;line-height:1.5}.cost-slide .section-heading{margin-bottom:22px}.cost-hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.cost-hero-grid .cost-card{min-height:255px}.cost-label{display:block;color:var(--muted);font-size:8px;letter-spacing:.12em;margin-top:14px}.cost-card p{font-size:10px;line-height:1.5;color:var(--muted)}.cost-card small{display:block;color:var(--muted);font-size:8px;line-height:1.4;margin-top:13px}.cost-machine-icon{float:right;width:82px;height:58px;border:2px solid var(--ink);border-radius:9px;display:grid;place-items:center;text-align:center;font-size:9px;font-weight:800;line-height:1.1;letter-spacing:.08em;background:#b9c0b8}.cost-table-wrap{margin-top:14px;overflow-x:auto}.cost-table{width:100%;border-collapse:collapse;background:var(--card);font-size:9px}.cost-table th,.cost-table td{padding:7px 9px;border:1px solid var(--line);text-align:left}.cost-table thead th{font-size:8px;letter-spacing:.08em;background:#1f2926;color:#fff}.cost-table tbody th{font-weight:700}.cost-table td:last-child{background:#eef4cf;color:#4e5800}.difference-callout{margin-top:14px;background:#1f2926;color:#fff;padding:16px;border-radius:var(--radius)}.difference-callout h2{font-size:18px;margin:8px 0 13px;color:var(--accent)}.difference-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.difference-grid div{display:flex;flex-direction:column;gap:5px}.difference-grid b{font-size:9px;letter-spacing:.1em;color:var(--accent)}.difference-grid span{font-size:10px;color:#d7ded8}.difference-callout .pill{background:var(--accent);color:var(--ink)}.cost-footnote small{font-size:9px}.limits-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.limit-card{background:var(--card);border:1px solid var(--line);padding:18px;min-height:120px}.limit-card span{color:var(--accent-dark);font-size:10px;font-weight:bold}.limit-card p{font-size:12px;line-height:1.45;margin:23px 0 0}.optional-callout{display:flex;align-items:center;gap:14px;background:#1f2926;color:#fff;padding:15px 20px;margin-top:18px}.optional-callout svg{color:var(--accent);width:20px}.optional-callout span,.optional-callout strong{display:block}.optional-callout span{font-size:8px;color:var(--accent);letter-spacing:.12em}.optional-callout strong{font-size:12px;margin-top:4px}.summary-slide{display:grid;grid-template-columns:.8fr 1.2fr;column-gap:7vw;align-content:center}.summary-slide .section-heading{align-self:start}.system-flow{text-align:center;border-left:1px solid var(--line);padding-left:5vw}.system-flow > div:not(.split):not(.arduino-end){background:var(--card);border:1px solid var(--line);padding:9px;font-size:10px;letter-spacing:.1em}.system-flow > b{display:block;color:var(--accent-dark);font-size:16px;line-height:1.5}.split{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:4px}.split section{display:flex;flex-direction:column;gap:8px;background:var(--accent);padding:10px}.split section b{color:var(--ink);font-size:18px}.split strong{font-size:10px}.split small{font-size:8px}.arduino-end{padding:11px;background:#1f2926;color:var(--accent);font-size:10px;letter-spacing:.1em}.summary-points{grid-column:1/-1;display:flex;gap:8px;margin-top:35px;flex-wrap:wrap}.summary-points span{background:var(--accent);padding:10px 14px;font-size:9px;letter-spacing:.1em;font-weight:bold}.summary-slide blockquote{grid-column:1/-1;font:italic 18px Georgia,serif;margin:28px 0 0;border-left:3px solid var(--accent-dark);padding-left:15px}.controls{height:58px;flex:none;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 4vw}.slide-meta{display:flex;align-items:center;gap:7px;font-size:10px;color:var(--muted)}.slide-number{font-weight:800;color:var(--ink);font-size:18px}.slash{color:var(--accent-dark);font-size:16px}.slide-name{margin-left:18px;letter-spacing:.12em;font-size:9px}.slide-nav{display:flex;gap:6px}.slide-nav button{width:38px;height:32px;border:1px solid var(--line);background:transparent;color:var(--ink)}.slide-nav button:hover:not(:disabled){background:var(--accent)}.slide-nav button:disabled{opacity:.3;cursor:not-allowed}.slide-nav svg{width:15px}.keyboard-hint{font-size:8px;color:var(--muted);letter-spacing:.1em}.keyboard-hint > span:not(.hint-key){border:1px solid var(--line);padding:3px 5px;margin:0 2px}.hint-key{margin-left:14px;border:1px solid var(--line);padding:3px 5px;color:var(--ink)} .demo-panel{display:flex;flex-direction:column;gap:16px;width:100%;}.demo-controls{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;}.demo-buttons{display:flex;gap:8px;margin-bottom:10px}.demo-buttons button{border:1px solid var(--ink);background:var(--ink);color:#fff;padding:9px 12px;font-size:9px;letter-spacing:.1em}.demo-buttons button+button{background:transparent;color:var(--ink)}.demo-buttons button:disabled{opacity:.5;cursor:default}.demo-controls label{display:block;border-top:1px solid var(--line);padding:8px 0}.demo-controls label span{display:flex;justify-content:space-between;font-size:8px;letter-spacing:.1em}.demo-controls label b{color:var(--accent-dark);font-size:10px}.demo-controls input[type=range]{margin-top:3px}.demo-counters{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:8px}.demo-counters span{font-size:7px;color:var(--muted);letter-spacing:.08em}.demo-counters b{display:block;color:var(--ink);font-size:18px;margin-top:3px}.demo-note{font-size:7px;letter-spacing:.08em;color:var(--muted);margin:12px 0 8px}.component-explanation{border-left:3px solid var(--accent);background:#eef0e9;padding:9px;font-size:10px;line-height:1.35;color:var(--muted)}.machine-hotspot{position:absolute;z-index:3;background:transparent;border:1px dashed transparent}.machine-hotspot:hover,.machine-hotspot:focus-visible{border-color:var(--accent);background:#d6ef3f18}.hotspot-hopper{left:3%;top:14px;width:104px;height:105px}.hotspot-ramp{left:19%;top:128px;width:65%;height:42px;transform:rotate(7deg)}.hotspot-fan{left:24%;top:181px;width:65px;height:62px;border-radius:50%}.moving-objects i{transition:transform .5s ease,opacity .4s ease}.moving-objects i.light{background:var(--accent)}.moving-objects i.heavy{background:#8a7657}.item-hopper{opacity:1;transform:translateX(0)}.item-ramp{transform:translateX(28px)}.item-air{transform:translateX(110px) translateY(-16px)}.item-heavyBin{transform:translateX(165px) translateY(32px);opacity:.35}.item-lightBin{transform:translateX(245px) translateY(-2px);opacity:.35}.bin{position:relative}.bin b{display:block;font-size:18px;color:var(--accent-dark);margin-top:3px}.machine-wrap{min-height:430px} @media (max-width:850px){.hero-slide,.summary-slide{grid-template-columns:1fr}.machine-wrap{min-height:300px}.process-row{overflow:auto;padding-bottom:8px}.process-node{min-width:130px}.trajectory-line{grid-template-columns:1fr}.trajectory-line strong{display:none}.formula-grid,.mechanical-layout,.experiment-layout{grid-template-columns:1fr}.physics-interaction{grid-template-columns:1fr}.integration-grid{grid-template-columns:1fr 1fr}.limits-grid{grid-template-columns:1fr 1fr}.system-flow{border-left:0;padding-left:0}.keyboard-hint{display:none}.controls{padding:0 5vw}.slide-name{display:none}.electrical-board{min-height:500px}.branch-left{left:5%}.branch-right{right:5%}.control-layer{left:3%;right:3%;flex-wrap:wrap}.pwm-branches{gap:12px}.cost-grid{grid-template-columns:1fr}.cost-vs{padding:6px}.summary-slide blockquote{margin-bottom:20px}} @media (max-width:520px){.topbar{height:62px;padding:0 5vw}.hero-copy h1{font-size:44px}.hero-chain{margin-top:25px;gap:8px}.machine-wrap{transform:scale(.8);transform-origin:top left;height:260px}.content-slide{padding-top:32px}.compare-grid,.mechanism-grid{grid-template-columns:1fr}.integration-grid,.limits-grid{grid-template-columns:1fr}.dimension-strip{flex-direction:column}.trajectory-card{padding:17px}.formula-grid{grid-template-columns:1fr}.formula-card b{font-size:21px}.top-actions .live-label{display:none}} @media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}} @layer base { * { border-color: var(--line); } body { background: var(--background); color: var(--foreground); } } .dashboard-placeholder { display:none; } .simulation-slide{max-width:1380px}.simulation-layout{display:grid;grid-template-columns:minmax(0,1.6fr) 300px;gap:16px;align-items:stretch}.canvas-card{height:390px;background:#1f2926;border-radius:var(--radius);overflow:hidden;position:relative;border:1px solid #35413b}.canvas-card canvas{display:block}.flow-labels{position:absolute;left:18px;right:18px;bottom:12px;display:flex;justify-content:space-between;color:#d6ef3f;font-size:8px;letter-spacing:.12em;pointer-events:none}.simulation-controls{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:13px}.sim-buttons{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:5px}.sim-buttons button{border:1px solid var(--ink);background:var(--ink);color:#fff;padding:8px 6px;font-size:7px;letter-spacing:.08em}.sim-buttons button:nth-child(n+2){background:transparent;color:var(--ink)}.sim-buttons button:disabled{opacity:.45}.simulation-controls label{display:block;border-top:1px solid var(--line);padding:7px 0}.simulation-controls label span{display:flex;justify-content:space-between;font-size:8px;letter-spacing:.07em}.simulation-controls label b{color:var(--accent-dark);font-size:10px}.simulation-controls input{margin-top:3px}.sim-feedback{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:14px}.sim-feedback div{background:var(--card);border:1px solid var(--line);padding:12px}.sim-feedback span,.sim-note span{display:block;color:var(--muted);font-size:7px;letter-spacing:.1em}.sim-feedback strong{display:block;font-size:22px;margin-top:8px}.sim-note{margin-top:12px;background:#eef0e9;border-left:3px solid var(--accent);padding:10px;color:var(--ink)}.sim-note strong{display:block;font-size:10px;margin-top:4px}.concept-note{font-size:9px;color:var(--muted);letter-spacing:.06em;margin:10px 0 0}.simulation-slide .section-heading{margin-bottom:20px} @media (max-width:850px){.simulation-layout{grid-template-columns:1fr}.canvas-card{height:320px}.sim-feedback{grid-template-columns:repeat(3,1fr)}} @media (max-width:520px){.canvas-card{height:260px}.sim-feedback{grid-template-columns:repeat(2,1fr)}.sim-feedback div{padding:9px}.sim-feedback strong{font-size:18px}.flow-labels{font-size:6px}} @keyframes spin { to { transform: rotate(360deg); } } @keyframes float { to { transform: translateX(12px); } } @keyframes moveObj { from { transform:translateX(0) } to { transform:translateX(170px) } } @keyframes air { 50% { transform:translateX(8px);opacity:.4 } } @keyframes slideObj { from { transform:translateX(-70px) } to { transform:translateX(70px) } } @keyframes slideIn { from { opacity:0;transform:translateX(16px) } to { opacity:1;transform:none } } @keyframes spin { to { transform:rotate(360deg) } } .demo-counts{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px;padding-top:9px;border-top:1px solid var(--line)}.demo-counts span{font-size:7px;color:var(--muted);letter-spacing:.08em}.demo-counts b{display:block;color:var(--ink);font-size:18px;margin-top:3px}.demo-explanation{border-left:3px solid var(--accent);background:#eef0e9;padding:9px;margin-top:10px;font-size:10px;line-height:1.35;color:var(--muted)}.conceptual-note{display:block;color:var(--muted);font-size:7px;letter-spacing:.08em;margin-top:10px}.moving-objects i{animation:demoTravel var(--item-speed,2s) ease-in-out infinite alternate}.moving-objects i.item-hopper{animation-play-state:paused}.moving-objects i.item-air{animation-name:demoAir}.moving-objects i.item-heavyBin,.moving-objects i.item-lightBin{animation-play-state:paused}.item-air{transform:translateX(var(--travel,120px)) translateY(-16px)}@keyframes demoTravel{from{transform:translateX(0)}to{transform:translateX(42px)}}@keyframes demoAir{from{transform:translateX(28px) translateY(0)}to{transform:translateX(var(--travel,120px)) translateY(-18px)}}.experiment-buttons{display:flex;gap:7px;margin-top:12px}.experiment-buttons button{border:1px solid var(--ink);background:var(--ink);color:#fff;padding:8px 10px;font-size:8px;letter-spacing:.1em}.experiment-buttons button+button{background:transparent;color:var(--ink)}.experiment-buttons button:disabled{opacity:.5}.live-graph{margin-top:18px;border:1px solid var(--line);background:var(--card);padding:15px}.graph-heading{display:flex;justify-content:space-between;font-size:9px;letter-spacing:.1em}.graph-heading b{color:var(--accent-dark);font-size:8px}.graph-bars{height:105px;display:flex;align-items:end;gap:10px;padding:12px 8px 0;background:repeating-linear-gradient(to top,transparent 0 25px,#e4e6de 26px)}.graph-bar{flex:1;min-height:12px;background:var(--accent-dark);transition:height .5s ease;position:relative}.graph-bar i{position:absolute;inset:0;background:var(--accent);transform:scaleY(.35);transform-origin:bottom;opacity:.8}.graph-running .graph-bar{animation:graphPulse .9s ease-in-out infinite alternate}.graph-axis{display:flex;justify-content:space-between;color:var(--muted);font-size:8px;letter-spacing:.08em;margin-top:8px}.live-graph>small{display:block;color:var(--muted);font-size:7px;letter-spacing:.07em;margin-top:12px;line-height:1.4}@keyframes graphPulse{to{transform:scaleY(.78);opacity:.7}}42:ob,10d:T10ca3,42:o10ca3,[V0_FILE]typescriptreact:file="/app/page.tsx" 'use client' import { useEffect, useMemo, useRef, useState } from 'react' import { Canvas, useFrame } from '@react-three/fiber' import { OrbitControls } from '@react-three/drei' import { ArrowLeft, ArrowRight, ChevronDown, Expand, Fan, Gauge, Layers3, Minus, Plus, RotateCcw, Wind, X } from 'lucide-react' import * as THREE from 'three' const slides = [ { eyebrow: 'ENGINEERING PROJECT / 2026', title: 'Low-Cost Vibratory Slide + Air Classifier Waste Segregator', short: 'Overview' }, { eyebrow: '01 / FEEDING', title: 'Why Controlled Feeding Matters', short: 'Problem' }, { eyebrow: '02 / PROCESS', title: 'Working Principle', short: 'Principle' }, { eyebrow: '03 / PHYSICS', title: 'Why Does Airflow Separate the Waste?', short: 'Physics' }, { eyebrow: '04 / MECHANICAL', title: 'Prototype Mechanical Design', short: 'Design' }, { eyebrow: '05 / MECHANISMS', title: 'Two Critical Mechanisms', short: 'Mechanisms' }, { eyebrow: '06 / ELECTRONICS', title: 'Electronic Control System', short: 'Controls' }, { eyebrow: '07 / SOFTWARE', title: 'CSE Integration', short: 'Integration' }, { eyebrow: '08 / TESTING', title: 'How We Measure Performance', short: 'Experiment' }, { eyebrow: '09 / ECONOMICS', title: 'Why Build a Prototype?', short: 'Cost' }, { eyebrow: '10 / BOUNDARIES', title: 'Limitations', short: 'Limits' }, { eyebrow: '11 / SUMMARY', title: 'Final Prototype Concept', short: 'Summary' }, { eyebrow: '12 / INTERACTIVE MODEL', title: 'Interactive 3D Working Model', short: '3D Model' }, ] function Pill({ children }: { children: React.ReactNode }) { return {children} } function SectionTitle({ eyebrow, title, sub }: { eyebrow: string; title: string; sub?: string }) { return
{eyebrow}
{title}
{sub &&
{sub}
}
} function FlowArrow() { return
} function ObjectDots({ pile = false }: { pile?: boolean }) { return
{Array.from({ length: pile ? 9 : 7 }).map((_, i) => )}
} type DemoItem = { id: number; kind: 'light' | 'heavy'; status: 'hopper' | 'ramp' | 'air' | 'heavyBin' | 'lightBin' } function Hero() { const [fanSpeed, setFanSpeed] = useState(64), [vibration, setVibration] = useState(52), [angle, setAngle] = useState(30), [dropCount, setDropCount] = useState(10) const [running, setRunning] = useState(false), [items, setItems] = useState([]), [explanation, setExplanation] = useState('Click a mechanical component for a quick explanation.') const release = () => { setRunning(true); setItems(Array.from({ length: dropCount }, (_, id) => ({ id, kind: id % 3 === 0 ? 'heavy' : 'light', status: 'hopper' }))) } const start = release const reset = () => { setRunning(false); setItems([]); setFanSpeed(64); setVibration(52); setAngle(30); setDropCount(10) } useEffect(() => { if (!running) return const timer = window.setInterval(() => setItems(current => current.map(item => { const feed = Math.min(1, .08 + vibration / 180 + (angle - 20) / 55) if (item.status === 'hopper' && Math.random() < feed) return { ...item, status: 'ramp' } if (item.status === 'ramp' && Math.random() < feed) return { ...item, status: 'air' } if (item.status === 'air') return { ...item, status: item.kind === 'light' && fanSpeed > 18 ? 'lightBin' : 'heavyBin' } return item })), Math.max(180, 1100 - vibration * 6 - (angle - 20) * 24)) return () => window.clearInterval(timer) }, [running, vibration, angle, fanSpeed]) const counts = { total: items.length, heavy: items.filter(i => i.status === 'heavyBin').length, light: items.filter(i => i.status === 'lightBin').length } const explain = (text: string) => () => setExplanation(text) const controls = [['FAN SPEED', fanSpeed, setFanSpeed, '%'], ['VIBRATION STRENGTH', vibration, setVibration, '%'], ['RAMP ANGLE', angle, setAngle, '°']] as const return
ENGINEERING PROJECT / 2026
Low-Cost
Vibratory Slide
+ Air Classifier
A compact prototype for lightweight and heavy waste separation.
VIBRATORY FEEDING→CONTROLLED AIRFLOW→TWO-FRACTION SEPARATION
TEAM MEMBERS: DIVYAJYOTI · VANSH · SAKSHI · SHAHID
01 / HOPPER
02 / VIBRATING RAMP
03 / FAN
04 / COLLECTION
{items.map(item => )}

→→→
HEAVY
WET{counts.heavy}
LIGHTWEIGHT
DRY{counts.light}
{controls.map(([label, value, setter, unit]) => {label}{value}{unit} setter(+e.target.value)} />)}
TOTAL ITEMS {counts.total}HEAVY / WET {counts.heavy}LIGHT / DRY {counts.light}
{explanation}
CONCEPTUAL SIMULATION — ILLUSTRATIVE, NOT EXPERIMENTAL DATA
} function Problem() { const [vibrating, setVibrating] = useState(true) return
01 / PILE FEED
Objects overlap.
Airflow affects multiple objects together
Separation becomes inconsistent
02 / CONTROLLED FEED
Objects spread out.
Objects reach the airflow individually
More consistent trajectories
} function Principle() { return
01
▦
WASTEmixed input
02
⌂
HOPPERbuffered supply
03
／
VIBRATING RAMPcontrolled feed
04
AIRFLOWtrajectory shift
05
▥
TWO BINStwo fractions
LIGHTWEIGHT / HIGH AREA-TO-MASS
→ LIGHTWEIGHT / DRY FRACTION
HEAVY / LOW AREA-TO-MASS
→ HEAVY / WET FRACTION
} function Physics() { const [kind, setKind] = useState<'wrapper' | 'scrap'>('wrapper'); return
WEIGHTW = m × gMass multiplied by gravitational acceleration.
AIR DRAGFᴅ = ½ × ρ × Cᴅ × A × v²Drag rises with area and the square of air velocity.
KEY RELATIONSHIPSeparation depends strongly on
surface-area-to-mass ratio.
{kind === 'wrapper' ? 'TRAVELS FARTHER' : 'FALLS CLOSER'}
{kind === 'wrapper' ? 'CHIP WRAPPER' : 'FOOD SCRAP'}
{kind === 'wrapper' ? 'More affected by airflow' : 'Less affected by airflow'}
{kind === 'wrapper' ? 'Low mass and relatively large surface area make the wrapper more responsive to the fan.' : 'Higher mass and a lower area-to-mass ratio make the scrap drop closer to the ramp.'}
} function Mechanical() { return
1
2
~40 cm × 20 cm
4
7
5
HEAVY / WET
6
LIGHTWEIGHT / DRY
3
VIBRATION MOTOR
30–35°
{[['01','Hopper','Buffered input'],['02','Vibrating ramp','~40 cm × 20 cm'],['03','Vibration motor','Under-ramp drive'],['04','Fan / blower','Horizontal airflow'],['05','Heavy / Wet bin','Closer drop zone'],['06','Lightweight / Dry bin','Farther trajectory'],['07','Divider','Two-fraction split']].map(([n,t,d]) =>
{n}
{t}{d}
)}
SIDE WALLS ~3 cmRAMP ANGLE ~30–35°DRY-BIN DISTANCE ~25–30 cm
} function Mechanisms() { const [vibration, setVibration] = useState(52); const [fan, setFan] = useState(64); return
01 / VIBRATORY FEEDER
Controls material flow.
Spreads objects and prevents large piles from entering the classifier together.
VIBRATION STRENGTH{vibration}%
setVibration(+e.target.value)} />
LOWHIGH
02 / AIR CLASSIFIER
Changes object trajectory.
Applies horizontal airflow to sort by aerodynamic behavior, not by material name.
FAN SPEED{fan}%
setFan(+e.target.value)} />
LOWHIGH
} function Electronics() { return
12V ADAPTER
POWER DISTRIBUTION
FAN / BLOWER
BUCK CONVERTER
VIBRATION MOTOR
ENHANCED CONTROL LAYER
ARDUINO
↓
PWM CONTROL
↙ FAN SPEED↘ VIBRATION STRENGTH
} function Integration() { return
{[['01','PWM CONTROL','Software-controlled fan and vibration speed.','◒'],['02','SENSOR COUNTING','IR sensors count objects entering each bin.','⌁'],['03','DATA LOGGING','Fan speed · vibration · items · accuracy','▤'],['04','DASHBOARD','Total items · fractions · sorting accuracy','▦']].map(([n,t,d,icon]) =>
{n}
{icon}
{t}
{d}
)}
SENSORS→ARDUINO→DATA→DASHBOARD
} function Experiment() { const [fan, setFan] = useState(55), [angle, setAngle] = useState(32), [vibration, setVibration] = useState(48), [running, setRunning] = useState(false) const performance = Math.round(Math.min(99, 38 + fan * .3 + vibration * .18 + (angle - 20) * .8)) const bars = Array.from({ length: 7 }, (_, i) => Math.max(12, Math.round(performance * (.58 + i * .055)))) const reset = () => { setFan(55); setAngle(32); setVibration(48); setRunning(false) } return
TEST PROTOCOL
10 + 10 sample
10 Lightweight/Dry + 10 Heavy/Wet
3 repeated trials
{[['Fan Speed', fan, setFan, ' %', 0, 100],['Ramp Angle', angle, setAngle, '°', 20, 40],['Vibration Strength', vibration, setVibration, ' %', 0, 100]].map(([label,val,setter,unit,min,max]) => {label as string}{val as number}{unit as string} { setRunning(false); (setter as (x:number)=>void)(+e.target.value) }} />)}
CONCEPTUAL ACCURACY{performance}%Illustrative response from selected settings
SIMULATED THROUGHPUT{Math.round(8 + vibration / 9 + (angle - 20) / 2)}/minNot a measured experimental result
CONCEPTUAL SIMULATION / LIVE RESPONSE
SELECTED CONTROLVALUERESPONSEFAN SPEED{fan}%{fan > 60 ? 'Stronger airflow' : 'Gentler airflow'}RAMP ANGLE{angle}°{angle > 30 ? 'Faster descent' : 'Slower descent'}VIBRATION{vibration}%{vibration > 60 ? 'Faster feeding' : 'Gentler feeding'}
SIMULATED SORTING PERFORMANCE{running ? 'RUNNING' : 'LIVE PREVIEW'}
{bars.map((height, i) =>
)}
LOWSELECTED CONTROL →HIGH
CONCEPTUAL SIMULATION — GRAPH RESPONDS TO FAN SPEED, VIBRATION STRENGTH AND RAMP ANGLE; NOT REAL EXPERIMENTAL DATA.
} function Cost() { const rows = [['Approx. Price','₹56,000','₹2,000–₹2,500'],['Type','Commercial air classifier','Educational prototype'],['Air Separation','✓','✓'],['Compact Form','✓','✓'],['Vibratory Feeding','Product dependent','✓'],['Adjustable Ramp Angle','Product dependent','✓'],['Adjustable Fan Speed','Product dependent','✓'],['Adjustable Vibration','Product dependent','✓'],['Particle Number Control','Not the focus','✓'],['Interactive Controls','Not the focus','✓'],['Sensors','Model dependent','Optional'],['Data Visualization','Not the main focus','✓'],['Main Goal','Commercial separation','Low-cost demonstration + experimentation']] as const; return
COMPACT COMMERCIAL PRODUCT
AIR
CLASSIFIER
APPROX. PRICE₹56,000
Capacity: 10 kg
Listed throughput: up to 500 kg/hr
Commercial air-based separation
Example of a compact commercial air-classification product available online. Price and specifications vary by model.
OUR PROTOTYPEESTIMATED BUILD COST₹2,000–2,500
Vibratory feeding ramp
Adjustable ramp angle, fan speed and vibration strength
User-controlled particles and airflow-based separation
Heavy/Wet and Lightweight/Dry collection
Arduino/control electronics, optional sensors
Interactive simulation and real-time visual feedback
{rows.map(([feature, product, prototype]) => )}
FEATURE COMPACT COMMERCIAL PRODUCT OUR PROTOTYPE
{feature} {product} {prototype}
KEY DIFFERENCE
WHAT WE ARE CHANGING
COMMERCIAL PRODUCT→ Ready-made separation machine→ Commercial construction→ Higher cost
OUR PROTOTYPE→ Low-cost construction→ Adjustable parameters→ Visible trajectories + interactive learning→ CSE + mechanical integration
Rather than simply copying an existing machine, our project converts the air-classification principle into a low-cost, adjustable and interactive tabletop prototype.
Commercial price based on an online Indian listing; specifications and pricing may vary. This comparison does not imply equal throughput, durability or commercial performance.
} function Limitations() { const limits = ['The system separates primarily according to aerodynamic behavior, not directly according to moisture.','Wet paper/tissue may behave unpredictably.','Heavy dry objects can enter the heavy fraction.','Small fans have limited airflow.','Object size and shape affect separation.','The system creates two fractions rather than fully identifying plastic, paper and metal.']; return
{limits.map((x,i) =>
0{i+1}
{x}
)}
OPTIONAL ENHANCEMENTMoisture sensing can improve wet/dry verification.
} function Summary() { return
HOPPER
↓
VIBRATING RAMP
↓
CONTROLLED FEEDING
↓
ADJUSTABLE AIRFLOW
↙HEAVY / WETIR SENSOR
↘LIGHT / DRYIR SENSOR
↘ ARDUINO ↙
↓
DATA LOGGING / DASHBOARD
COMPACTLOW-COSTCONTROLLED FEEDINGADJUSTABLE AIRFLOWSENSOR-BASED MEASUREMENT
“A simple industrial separation principle, redesigned as a compact educational prototype.”
} type SimSettings = { particles: number; fan: number; vibration: number; angle: number; weight: number; size: number; direction: number; running: boolean; dropped: boolean } function MachineScene({ settings, onSelect }: { settings: SimSettings; onSelect: (text: string) => void }) { const group = useRef(null) const phase = useRef(0) const items = useMemo(() => Array.from({ length: settings.particles }, (_, i) => ({ light: i % 3 !== 0, seed: i * 1.71 })), [settings.particles]) const rampAngle = THREE.MathUtils.degToRad(settings.angle - 30) useFrame((_, delta) => { phase.current += delta * (settings.running ? .7 + settings.vibration / 38 : .08); if (group.current) group.current.position.y = Math.sin(phase.current * 5) * settings.vibration / 900 }) const metal = '#71807b', dark = '#24302d', lime = '#d6ef3f' return onSelect('The bolted steel frame supports the feed path, blower bracket, and collection zones.')}> {[-3.9, 3.9].flatMap(x => [-1.45, 1.45].map(z => ))} {[-2.4, 2.4].map(x => )} onSelect('The hopper buffers mixed waste above the ramp and meters it through a narrow outlet.') }> {[-.25, 0, .25].map((x, i) => )} onSelect('The inclined tray rotates around its hinge as Ramp Angle changes. Vibration motor mounts underneath.') }> {[-1, 1].map(z => )} {[-2, -1, 0, 1, 2].map(x => )} onSelect('The air classifier sits at the ramp exit; fan speed changes blade rotation, airflow, and particle reach.') }> {[0, 1, 2].map(i => )} {[-1.25, 1.25].map((z, i) => onSelect(i ? 'The far tray collects lightweight dry items carried farther by airflow.' : 'The near tray collects heavier wet items that resist airflow.') }> {[-.55, .55].map(x => )} )} {items.map((item, i) => { const t = settings.dropped ? (phase.current * (.12 + settings.vibration / 500) + item.seed) % 1 : 0; const airflowResponse = Math.max(.25, 1 - settings.weight / 125) * (1 - settings.size / 260); const travel = item.light ? 7.3 + settings.fan / 16 : 4.6 + settings.fan / 45; const x = -2.6 + t * travel * airflowResponse * settings.direction; const y = .58 + Math.sin(t * Math.PI) * .6 - t * 1.5 + Math.sin(item.seed + phase.current * 2) * .04; const z = ((i % 5) - 2) * .28; return onSelect(item.light ? 'This lightweight particle follows a longer curved trajectory through the airflow.' : 'This heavy particle resists airflow and lands in the near tray.')}> })} {Array.from({ length: 7 }).map((_, i) => )} } function Simulation3D() { const [s, setS] = useState({ particles: 10, fan: 62, vibration: 48, angle: 30, weight: 45, size: 45, direction: 1, running: false, dropped: false }) const [note, setNote] = useState('Click a machine component for an explanation.') const update = (key: keyof SimSettings, value: number) => setS(prev => ({ ...prev, [key]: value })) const heavy = Math.round(s.particles * (1 - s.fan / 180 + s.weight / 240)), dry = s.particles - heavy const efficiency = Math.round(Math.min(98, 45 + s.fan * .25 + s.vibration * .15 + (s.angle - 15) * .45)) const controls: [keyof SimSettings, string, number, number, string][] = [['particles', 'NUMBER OF ITEMS TO DROP', 1, 50, ''], ['fan', 'FAN SPEED', 0, 100, '%'], ['vibration', 'VIBRATION STRENGTH', 0, 100, '%'], ['angle', 'RAMP ANGLE', 15, 45, '°'], ['weight', 'PARTICLE WEIGHT', 0, 100, ''], ['size', 'PARTICLE SIZE', 0, 100, '']] return
FEEDVIBRATORY RAMPAIRFLOWSEPARATIONBINS
{controls.map(([key, label, min, max, unit]) => {label}{s[key] as number}{unit} update(key, +e.target.value)} />)}AIRFLOW DIRECTION{s.direction > 0 ? '→' : '←'} update('direction', +e.target.value)} />
PARTICLES{s.particles}
FAN SPEED{s.fan}%
HEAVY / WET{heavy}
LIGHT / DRY{dry}
SEPARATION EFFICIENCY{efficiency}%
COMPONENT NOTE{note}
Interactive 3D Conceptual Simulation — Parameters are adjustable for demonstration. Simulated values are illustrative, not real experimental data.
} export default function Home() { const [slide, setSlide] = useState(0); const [full, setFull] = useState(false) const next = () => setSlide(s => Math.min(s + 1, slides.length - 1)); const prev = () => setSlide(s => Math.max(s - 1, 0)) useEffect(() => { const onKey = (e: KeyboardEvent) => { if (e.key === 'ArrowRight' || e.key === ' ') next(); if (e.key === 'ArrowLeft') prev(); if (e.key.toLowerCase() === 'f') setFull(v => !v) }; window.addEventListener('keydown', onKey); return () => window.removeEventListener('keydown', onKey) }, []) const view = useMemo(() => [, , , , , , , , , , ,
, ][slide], [slide]) return
VS
VIBRATORY SLIDEAIR CLASSIFIER / PROJECT 01
LIVE DEMO
{view}
{String(slide + 1).padStart(2, '0')}/{String(slides.length).padStart(2, '0')}{slides[slide].short}
←→ TO NAVIGATE F FULLSCREEN
} [V0_FILE]css:file="/app/globals.css" @import 'tailwindcss'; @import 'tw-animate-css'; @import 'shadcn/tailwind.css'; @custom-variant dark (&:is(.dark *)); :root { color-scheme: light; --background:#f4f3ef; --foreground:#18201f; --muted:#737a78; --line:#d7d9d2; --accent:#d6ef3f; --accent-dark:#839400; --ink:#18201f; --card:#fbfbf8; --radius:12px; } @theme inline { --color-background:var(--background); --color-foreground:var(--foreground); --color-card:var(--card); --color-card-foreground:var(--foreground); --color-border:var(--line); --color-muted-foreground:var(--muted); --color-primary:var(--ink); --color-primary-foreground:#fff; --color-accent:var(--accent); --radius-lg:var(--radius); } * { box-sizing:border-box; } body { margin:0; background:var(--background); color:var(--ink); font-family:Arial, Helvetica, sans-serif; } button,input { font:inherit; } button { cursor:pointer; } .presentation { min-height:100vh; display:flex; flex-direction:column; overflow:hidden; background:var(--background); } .presentation.fullscreen { position:fixed; inset:0; z-index:20; } .topbar { height:76px; flex:none; display:flex; align-items:center; justify-content:space-between; padding:0 4vw; border-bottom:1px solid var(--line); } .brand-mark { display:flex; gap:12px; align-items:center; letter-spacing:.06em; } .brand-mark > span { width:32px; height:32px; display:grid; place-items:center; color:var(--ink); background:var(--accent); font-size:11px; font-weight:800; border-radius:50%; } .brand-mark strong,.brand-mark small { display:block; }.brand-mark strong { font-size:11px; }.brand-mark small { font-size:8px; color:var(--muted); letter-spacing:.12em; margin-top:3px; } .top-actions { display:flex; align-items:center; gap:9px; font-size:9px; letter-spacing:.14em; color:var(--muted); }.top-actions button { border:0; background:none; padding:8px; color:var(--ink); }.top-actions svg { width:17px; }.status-dot { width:7px; height:7px; border-radius:50%; background:var(--accent-dark); box-shadow:0 0 0 4px #e6edc0; }.live-label { margin-right:12px; } .progress { height:3px; background:#e8e9e3; flex:none; }.progress span { display:block; height:100%; background:var(--accent-dark); transition:width .45s ease; } .slide-viewport { flex:1; overflow:auto; }.slide-key { min-height:calc(100vh - 137px); animation:slideIn .38s ease both; }@keyframes slideIn { from{opacity:0;transform:translateX(16px)} to{opacity:1;transform:none} } .hero-slide,.content-slide { max-width:1240px; margin:auto; width:100%; min-height:calc(100vh - 137px); padding:clamp(34px,5vw,76px) 5vw; }.hero-slide { display:grid; grid-template-columns:1fr 1fr; align-items:center; gap:4vw; }.hero-copy h1 { font-size:clamp(42px,5.3vw,82px); line-height:.94; letter-spacing:-.07em; max-width:650px; margin:22px 0 24px; font-weight:750; }.hero-copy h1 em { color:var(--accent-dark); font-style:normal; }.hero-sub { max-width:370px; color:var(--muted); line-height:1.45; font-size:16px; }.pill { display:inline-block; color:var(--muted); font-size:9px; letter-spacing:.16em; font-weight:700; }.hero-chain { display:flex; align-items:center; gap:13px; margin-top:42px; font-size:9px; letter-spacing:.12em; font-weight:700; flex-wrap:wrap; }.hero-chain b { color:var(--accent-dark); font-size:17px; }.team { margin-top:56px; font-size:9px; color:var(--muted); letter-spacing:.12em; }.team strong { color:var(--ink); }.machine-wrap { position:relative; min-height:430px; display:grid; place-items:center; }.machine { position:relative; width:min(100%,520px); height:330px; border-bottom:7px solid #27312e; }.hopper { position:absolute; left:5%; top:20px; width:100px; height:92px; background:#d8dbd1; clip-path:polygon(0 0,100% 0,72% 100%,28% 100%); display:grid; place-items:center; }.ramp { position:absolute; left:22%; top:140px; width:58%; height:24px; background:#283330; transform:rotate(7deg); border-radius:3px; }.ramp-ribs { position:absolute; inset:5px 8px; background:repeating-linear-gradient(90deg,#9aa39c 0 2px,transparent 2px 15px); opacity:.5; }.moving-objects i { position:absolute; width:12px; height:12px; border-radius:3px; background:var(--accent); top:-7px; animation:moveObj 2.4s linear infinite; }.moving-objects i:nth-child(1){left:15%;}.moving-objects i:nth-child(2){left:43%;animation-delay:.7s}.moving-objects i:nth-child(3){left:68%;animation-delay:1.4s}@keyframes moveObj { from{transform:translateX(0)} to{transform:translateX(170px)} } .fan { position:absolute; left:27%; top:190px; color:var(--accent-dark); }.fan svg { width:42px; height:42px; animation:spin 2s linear infinite; }@keyframes spin{to{transform:rotate(360deg)}}.air-lines { position:absolute; left:38%; top:205px; display:flex; gap:20px; color:var(--accent-dark); font-size:28px; animation:air 1s linear infinite; }.air-lines span:nth-child(2){animation-delay:.2s}.air-lines span:nth-child(3){animation-delay:.4s}@keyframes air{50%{transform:translateX(8px);opacity:.4}} .bin { position:absolute; bottom:0; width:125px; height:93px; padding:14px 9px; font-size:10px; letter-spacing:.1em; font-weight:800; line-height:1.3; text-align:center; background:#d8dbd1; border:2px solid #26312e; border-bottom:0; }.bin small { color:var(--muted); font-size:8px; }.bin.heavy{left:35%;}.bin.light{right:2%; background:var(--accent);}.motor { position:absolute; left:48%; bottom:-31px; color:#27312e; }.motor svg{width:34px;}.machine-label { position:absolute; font-size:8px; color:var(--muted); letter-spacing:.12em; }.label-hopper{left:0;top:76px}.label-ramp{left:28%;top:123px}.label-fan{left:21%;top:278px}.label-bins{right:0;bottom:48px} .section-heading { margin-bottom:32px; }.section-heading h1 { font-size:clamp(34px,4.3vw,61px); line-height:.98; letter-spacing:-.065em; margin:14px 0 10px; max-width:780px; }.section-heading p { color:var(--muted); max-width:600px; line-height:1.5; margin:0; font-size:14px; } .toggle-row { display:flex; gap:7px; margin-bottom:20px; }.toggle-row button { border:1px solid var(--line); background:transparent; color:var(--muted); padding:10px 14px; font-size:9px; letter-spacing:.1em; }.toggle-row button.active { background:var(--ink); color:white; border-color:var(--ink); }.compare-grid,.mechanism-grid,.cost-grid { display:grid; grid-template-columns:1fr 1fr; gap:18px; }.compare-card,.mechanism-card,.cost-card { background:var(--card); border:1px solid var(--line); padding:25px; border-radius:var(--radius); }.compare-card.selected { border-color:var(--accent-dark); box-shadow:inset 0 3px var(--accent); }.card-kicker { color:var(--muted); font-size:9px; letter-spacing:.14em; }.compare-card h2,.mechanism-card h2 { font-size:26px; letter-spacing:-.04em; margin:10px 0; }.visual-feed { height:128px; margin:20px 0; background:#eef0e9; display:grid; place-items:center; position:relative; overflow:hidden; }.object-dots { display:flex; gap:22px; align-items:center; }.object-dots span { width:17px;height:17px;border-radius:50%;background:var(--accent-dark);box-shadow:inset -4px -4px #667100; }.object-dots.pile { width:100px; display:flex; flex-wrap:wrap; gap:6px; justify-content:center; }.object-dots.pile span { width:21px;height:21px; }.compare-card ul { padding-left:18px; color:var(--muted); font-size:12px; line-height:1.8; margin:0; } .process-row { display:flex; align-items:center; gap:10px; }.process-node { background:var(--card); border:1px solid var(--line); padding:15px 12px; flex:1; min-width:100px; position:relative; }.process-node.active { border-color:var(--accent-dark); box-shadow:inset 0 3px var(--accent); }.process-node span { font-size:8px;color:var(--muted); }.node-icon { height:48px; display:grid; place-items:center; font-size:28px; color:var(--accent-dark); }.node-icon svg { width:28px; }.process-node strong,.process-node small { display:block; }.process-node strong { font-size:10px; }.process-node small { font-size:9px; color:var(--muted); margin-top:4px; }.flow-arrow { color:var(--muted); }.flow-arrow svg { width:18px; }.trajectory-card { margin-top:28px; background:#1f2926; color:#fff; border-radius:var(--radius); padding:24px; display:grid; gap:18px; }.trajectory-line { display:grid; grid-template-columns:210px 1fr 190px; gap:15px; align-items:center; font-size:10px; }.trajectory-label { letter-spacing:.08em; font-size:9px; }.light-label{color:var(--accent)}.heavy-label{color:#b9c0bc}.dashed-trajectory { border-top:2px dashed var(--accent); position:relative; }.dashed-trajectory:after{content:'›';position:absolute;right:0;top:-15px;color:var(--accent);font-size:25px}.heavy-traj{border-color:#9ba49e;width:55%}.trajectory-line strong{font-size:10px;letter-spacing:.08em} .formula-grid { display:grid; grid-template-columns:1fr 1.35fr 1.2fr; gap:14px; }.formula-card,.ratio-callout { padding:22px; background:var(--card); border:1px solid var(--line); border-radius:var(--radius); }.formula-card span,.ratio-callout span { 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VS
VIBRATORY SLIDEAIR CLASSIFIER / PROJECT 01
LIVE DEMO
11 / SUMMARY
Final Prototype Concept
One compact loop from mixed input to measured output.
HOPPER
↓
VIBRATING RAMP
↓
CONTROLLED FEEDING
↓
ADJUSTABLE AIRFLOW
↙HEAVY / WETIR SENSOR
↘LIGHT / DRYIR SENSOR
↘ ARDUINO ↙
↓
DATA LOGGING / DASHBOARD
COMPACTLOW-COSTCONTROLLED FEEDINGADJUSTABLE AIRFLOWSENSOR-BASED MEASUREMENT
“A simple industrial separation principle, redesigned as a compact educational prototype.”
12/13Summary
←→ TO NAVIGATE F FULLSCREEN
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{title}

Low-CostVibratory Slide+ Air Classifier

Objects overlap.

Objects spread out.

{kind === 'wrapper' ? 'More affected by airflow' : 'Less affected by airflow'}

Controls material flow.

Changes object trajectory.

{t}

10 + 10 sample

WHAT WE ARE CHANGING

{title}

Low-CostVibratory Slide+ Air Classifier

Objects overlap.

Objects spread out.

{kind === 'wrapper' ? 'More affected by airflow' : 'Less affected by airflow'}

Controls material flow.

Changes object trajectory.

{t}

10 + 10 sample

WHAT WE ARE CHANGING

Final Prototype Concept

Low-Cost
Vibratory Slide
+ Air Classifier

Low-Cost
Vibratory Slide
+ Air Classifier