/*
 * Proof — the one product over Signet, Baton, Fieldstamp, Screener and Turnstile.
 * Written against the design tokens only; the landing redesign's L2 moves shared
 * pieces (cards, the CTA band) into the site's one stylesheet.
 */
.pf-crumbs { padding-top: var(--sp-5, 1.25rem); font-size: var(--fs-sm); color: var(--text-muted); }
.pf-crumbs a { color: var(--brand-ink); display: inline-flex; align-items: center; justify-content: center; min-height: 44px; min-width: 44px; }

.pf-eyebrow { margin: 0 0 .5rem; color: var(--brand-ink); font-family: var(--font-mono); font-size: var(--fs-xs); font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }

.pf-hero { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; padding-block: clamp(1.5rem, 4vw, 3rem) clamp(2.5rem, 6vw, 4.5rem); }
.pf-hero h1 { margin: 0 0 1rem; font-size: clamp(2.1rem, 5vw, 3.4rem); line-height: 1.05; letter-spacing: -.035em; color: var(--text); }
.pf-hero h1 span { display: block; color: var(--brand-ink); }
.pf-lede { margin: 0 0 1.5rem; max-width: 36rem; color: var(--text-body); font-size: var(--fs-base); line-height: 1.6; }
.pf-actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.pf-actions .btn, .pf-cta .btn, .pf-use .btn { min-height: 44px; }

.pf-toy { padding: 1.25rem; border: 1px solid var(--border-strong); border-radius: var(--r-lg); background: var(--surface-1); }
.pf-toy__head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.pf-toy__head h2 { margin: 0; font-size: var(--fs-md); color: var(--text); }
.pf-chain { list-style: none; margin: 0; padding: 0; display: grid; gap: .6rem; }
.pf-chain li { position: relative; display: grid; gap: .2rem; padding: .7rem .9rem; border: 1px solid color-mix(in srgb, var(--success) 40%, var(--border)); border-radius: var(--r-md); background: var(--surface-2); transition: border-color var(--dur, .2s), background var(--dur, .2s); }
.pf-chain li + li::before { content: ""; position: absolute; left: 1.1rem; top: -.65rem; height: .6rem; border-left: 2px solid var(--border-strong); }
.pf-chain b { color: var(--text); font-size: var(--fs-md); }
.pf-chain code { color: var(--text-muted); font-family: var(--font-mono); font-size: var(--fs-xs); overflow-wrap: anywhere; }
.pf-chain li.is-broken { border-color: var(--danger); background: color-mix(in srgb, var(--danger) 10%, var(--surface-2)); }
.pf-chain li.is-broken code { color: var(--danger); }
.pf-verdict { margin: 1rem 0 .5rem; font-weight: 700; color: var(--success); }
.pf-toy[data-state="broken"] .pf-verdict { color: var(--danger); }
.pf-toy__note { margin: 0; font-size: var(--fs-sm); color: var(--text-muted); line-height: 1.5; }

.pf-band { background: var(--surface-1); border-block: 1px solid var(--border); padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.pf-section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.pf-band h2, .pf-section h2 { margin: 0 0 1.5rem; font-size: clamp(1.5rem, 3vw, 2rem); letter-spacing: -.02em; color: var(--text); }

.pf-steps { list-style: none; margin: 0 0 1.25rem; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); gap: 1rem; }
.pf-steps li { padding: 1.25rem; border: 1px solid var(--border); border-radius: var(--r-lg); background: var(--bg); }
.pf-steps__n { display: inline-grid; place-items: center; width: 2rem; height: 2rem; margin-bottom: .75rem; border-radius: var(--r-md); background: var(--brand-subtle); color: var(--brand-ink); font-weight: 700; }
.pf-steps h3 { margin: 0 0 .4rem; color: var(--text); font-size: var(--fs-base); }
.pf-steps p { margin: 0 0 .6rem; color: var(--text-body); line-height: 1.55; font-size: var(--fs-md); }
.pf-steps code { color: var(--brand-ink); font-family: var(--font-mono); font-size: var(--fs-xs); }
.pf-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--brand-ink); font-weight: 600; }

.pf-uses { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 18rem), 1fr)); gap: 1rem; }
.pf-use { display: flex; flex-direction: column; gap: .5rem; padding: 1.25rem; border: 1px solid var(--border); border-radius: var(--r-lg); background: var(--surface-1); transition: transform var(--dur-fast, .15s), border-color var(--dur-fast, .15s); }
.pf-use:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.pf-use__label { margin: 0; color: var(--brand-ink); font-family: var(--font-mono); font-size: var(--fs-xs); font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.pf-use h3 { margin: 0; color: var(--text); font-size: var(--fs-lg); }
.pf-use > p { margin: 0; color: var(--text-body); line-height: 1.55; font-size: var(--fs-md); }
.pf-use dl { display: grid; grid-template-columns: auto 1fr; margin: .25rem 0 .5rem; font-size: var(--fs-sm); }
.pf-use dt, .pf-use dd { margin: 0; padding: .45rem 0; border-top: 1px solid var(--border); }
.pf-use dt { color: var(--text-muted); padding-right: 1rem; }
.pf-use dd { color: var(--text); text-align: right; }
.pf-use .btn { margin-top: auto; align-self: flex-start; }
.pf-use--ask { justify-content: center; border-style: dashed; background: transparent; }

.pf-trust { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3rem); align-items: start; }
.pf-can, .pf-cannot { margin: 0 0 .75rem; padding: .9rem 1rem; border: 1px solid var(--border); border-radius: var(--r-md); background: var(--bg); color: var(--text-body); }
.pf-can span { color: var(--success); }
.pf-cannot span { color: var(--danger); }
.pf-faq { display: grid; gap: .75rem; }
.pf-faq details { border: 1px solid var(--border); border-radius: var(--r-md); background: var(--bg); }
.pf-faq summary { display: flex; align-items: center; min-height: 48px; padding: 0 1rem; color: var(--text); font-weight: 600; cursor: pointer; }
.pf-faq details p { margin: 0; padding: 0 1rem 1rem; color: var(--text-body); line-height: 1.55; }

.pf-cta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.25rem; padding: clamp(1.25rem, 3vw, 2rem); border: 1px solid color-mix(in srgb, var(--brand) 45%, var(--border)); border-radius: var(--r-xl); background: var(--surface-1); }
.pf-cta h2 { margin: 0 0 .4rem; }
.pf-cta p { margin: 0; color: var(--text-body); max-width: 48rem; }

a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--brand); outline-offset: 2px; }

@media (max-width: 860px) {
    .pf-hero, .pf-trust { grid-template-columns: minmax(0, 1fr); }
}
.pf-toy__note a { color: var(--brand-ink); text-decoration: underline; text-underline-offset: 2px; }