:root{--p351-base-light:#f7ebec;--p351-base-soft:#ddbdd5;--p351-base-mid:#ac9fbb;--p351-base-accent:#59656f;--p351-base-dark:#1d1e2c;--p351-ground-top:color-mix(in srgb, var(--p351-base-light) 55%, white);--p351-ground-bottom:color-mix(in srgb, var(--p351-base-accent) 14%, white);--p351-ground:color-mix(in srgb, var(--p351-ground-top) 50%, var(--p351-ground-bottom));--p351-ground-gradient:linear-gradient(180deg, var(--p351-ground-top) 0%, var(--p351-ground-bottom) 100%);--p351-surface:color-mix(in srgb, var(--p351-base-light) 35%, white);--p351-ink:var(--p351-base-dark);--p351-heading:var(--p351-base-dark);--p351-ink-soft:color-mix(in srgb, var(--p351-base-dark) 78%, white);--p351-accent:var(--p351-base-accent);--p351-accent-strong:var(--p351-base-dark);--p351-on-accent:color-mix(in srgb, var(--p351-base-light) 40%, white);--p351-on-accent-soft:color-mix(in srgb, var(--p351-base-soft) 50%, white);--p351-line:var(--p351-base-mid);--p351-line-soft:color-mix(in srgb, var(--p351-base-mid) 45%, white);--p351-tint:color-mix(in srgb, var(--p351-base-soft) 25%, white);--p351-tint-strong:var(--p351-base-soft);--p351-tint-cool:color-mix(in srgb, var(--p351-base-mid) 18%, white);--p351-tint-cool-strong:color-mix(in srgb, var(--p351-base-mid) 38%, white);--p351-shadow:color-mix(in srgb, var(--p351-base-dark) 8%, transparent);--p351-grid:color-mix(in srgb, var(--p351-line) 13%, transparent);--p351-base-warn:#7d4250;--p351-danger:var(--p351-base-warn);--p351-danger-line:color-mix(in srgb, var(--p351-base-warn) 40%, white);--p351-danger-tint:color-mix(in srgb, var(--p351-base-warn) 8%, white);--p351-caution:var(--p351-accent);--p351-caution-line:var(--p351-line);--p351-series-2:var(--p351-base-warn);--p351-code-keyword:color-mix(in srgb, var(--p351-base-mid) 45%, var(--p351-base-dark));--p351-code-string:var(--p351-base-warn);--p351-code-function:var(--p351-base-accent);--p351-pin-3v3:var(--p351-base-soft);--p351-pin-3v3-ink:var(--p351-base-dark);--p351-pin-5v:var(--p351-base-warn);--p351-pin-gnd:var(--p351-base-dark);--p351-pin-io:color-mix(in srgb, var(--p351-base-accent) 12%, white);--p351-pin-highlight:color-mix(in srgb, var(--p351-base-accent) 30%, white)}.course-page{background:var(--p351-ground-gradient) fixed;--ground:var(--p351-ground);--ground-lift:var(--p351-tint);--ground-deep:var(--p351-tint-strong);--ink:var(--p351-ink);--ink-mid:var(--p351-ink-soft);--ink-soft:color-mix(in srgb, var(--p351-ink-soft) 85%, transparent);--ink-ghost:color-mix(in srgb, var(--p351-ink) 18%, transparent);--celadon:var(--p351-accent);--celadon-dim:color-mix(in srgb, var(--p351-accent) 15%, transparent);--celadon-mid:color-mix(in srgb, var(--p351-accent) 50%, transparent);--celadon-wash:color-mix(in srgb, var(--p351-accent) 6%, transparent);--slate:var(--p351-ink-soft);--slate-mid:var(--p351-ink-soft);--rule:color-mix(in srgb, var(--p351-line) 35%, transparent);--rule-mid:color-mix(in srgb, var(--p351-line) 60%, transparent)}.course-shell{max-width:1220px;margin:0 auto;padding:125px 40px 60px}.course-heading{max-width:850px;padding:25px 0 42px}.course-back,.course-eyebrow{font:11px/1.7 var(--ff-mono);letter-spacing:.09em;color:var(--p351-accent)}.course-back{margin-bottom:34px;display:inline-block}.course-eyebrow{text-transform:uppercase;margin-bottom:15px}.course-heading h1{font:400 clamp(38px,5.5vw,70px)/1.12 var(--ff-display);letter-spacing:-.025em;color:var(--ink);max-width:1000px}.course-deck{max-width:760px;color:var(--ink-mid);margin-top:24px;font-size:22px;line-height:1.55}.course-page a:not(.skip-link){text-decoration:none;transition:color .35s;position:relative}.course-page a:not(.skip-link):after{content:"";background:color-mix(in srgb,var(--p351-accent) 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