TITLE: SUMMIT — 8,849 m
PROMPT: Create 'SUMMIT — 8,849 m', a scroll-climb from base camp to the death zone: layered parallax ridgelines darkening with altitude, weather strata (clouds you scroll past, jet-stream streaks), an oxygen-percentage readout falling, temperature dropping, sparse expedition copy between camps; a fixed altitude meter with camp markers (Base 5,364 → C1 → C2 → C3 → South Col → Summit) tracks scroll; summit arrival shows a panorama reveal and rippling prayer flags. Interactions: scroll drives all layers; camp dots jump; a supplementary-oxygen toggle changes the copy and screen vignette (hypoxia hint); pointer parallax between scrolls; at the top a FLAG button plants your flag with a snap animation. Epic, airy, brutal.
DESCRIPTION: A scroll-driven expedition up the world's tallest mountain: five chapters from base camp through camp II, the south col, the Hillary step, and the summit, with sparse expedition copy and glass stat chips (altitude, temperature with wind chill, O₂ saturation). Fixed instrumentation: a live altitude/temperature readout interpolating as you scroll, a glowing climb meter with a glowing dot, and twin parallax ridgelines that sink and fade as you gain height while the pointer adds lateral parallax. Above 7,986 m with oxygen toggled off (press O or click the readout) a hypoxia vignette closes in; at the top, PLANT THE FLAG grows a row of flapping pennants with a bandpass-filtered flag snap.
TECHNIQUES: scroll-linked altitude/temperature interpolation between camp keyframes, fixed climb meter with progress fill and climber dot, CSS-transform parallax ridgelines with pointer offset, hypoxia radial vignette gated by altitude + oxygen state, prayer-flag pennant generation with skew keyframes, WebAudio noise-burst flag snap (gesture-gated).
INTERACTION: Scroll to climb (readouts and ridges respond); move the pointer for parallax; toggle oxygen (O key or click) to feel the death zone narrow the screen; plant the flag at the summit.