/* Two Thresholds website. Light only. Screenshots are shown at half their capture size, so the app's text
   appears at its real size; tiles let a screenshot peek in from the corner and open full size on click. */
:root {
  --navy: #00205b; --lt1: #3f72d6; --lt2: #ba0c2f;
  --ink: #1d1d1f; --ink-2: #424245; --ink-3: #6e6e73; --line: rgba(0, 0, 0, .07);
  --grey: #f5f5f7; --link: #0b4fc4;
  --sans: "Geist", system-ui, -apple-system, "Segoe UI", sans-serif;
  --display: "Outfit", "Geist", system-ui, sans-serif;
  color-scheme: light;
}
* { box-sizing: border-box }
html { scroll-behavior: smooth; scroll-padding-top: 110px }
body { margin: 0; background: #fff; color: var(--ink); font: 16px/1.5 var(--sans); -webkit-font-smoothing: antialiased }
a { color: var(--link) } a:hover { color: var(--navy) }
img { max-width: none }
.w { max-width: 1200px; margin: 0 auto; padding: 0 24px }
.muted { color: var(--ink-3) }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(255, 255, 255, .85); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid var(--line) }
.nav-in { height: 56px; display: flex; align-items: center; gap: 28px }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--navy) }
.logo span { font: 600 19px/1 var(--display); letter-spacing: -0.02em; white-space: nowrap }
.navlinks { margin-left: auto; display: flex; gap: 28px; align-items: center; font-size: 14px }
.navlinks a { color: var(--ink-2); text-decoration: none; white-space: nowrap }
.navlinks a:hover { color: var(--navy) }
.navlinks a[aria-current] { color: var(--ink); font-weight: 600 }
.btn { display: inline-block; font: 500 15px/1 var(--sans); color: #fff; background: var(--navy); padding: 13px 24px; border: 0; border-radius: 980px; text-decoration: none; white-space: nowrap; cursor: pointer }
.btn:hover { color: #fff; background: #0a2f78 }
.btn.sm { font-size: 14px; padding: 9px 16px }
.btn.lg { font-size: 17px; padding: 15px 28px }
@media (max-width: 560px) { .nav-in { gap: 14px } .navlinks { gap: 14px } .logo span { display: none } }

/* shared */
.shot { display: block; max-width: 100%; height: auto; border-radius: 14px; border: 1px solid var(--line); box-shadow: 0 30px 70px -30px rgba(0, 32, 91, .35), 0 2px 6px rgba(0, 0, 0, .04) }
.bento { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px }
.bento.dense { grid-auto-flow: dense }
.tile { position: relative; overflow: hidden; height: 390px; border-radius: 20px; background: #fff; padding: 26px 26px 0 }
.tile img { position: absolute; left: 26px; top: 128px; border-radius: 12px; border: 1px solid var(--line); box-shadow: 0 20px 50px -24px rgba(0, 32, 91, .35) }
.span2 { grid-column: span 2 }
.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 48px; align-items: center }
@media (max-width: 860px) { .bento, .two { grid-template-columns: minmax(0, 1fr) } .span2 { grid-column: auto } .two { gap: 32px } }

/* sign-up */
.signup { margin: 40px auto 0; max-width: 560px; display: flex; flex-direction: column; gap: 14px; text-align: left }
.signup label { display: block; font-size: 14px; color: var(--ink-2) }
.signup input:not([type=radio]), .signup textarea { display: block; width: 100%; margin-top: 6px; padding: 13px 15px; font: 16px var(--sans); color: var(--ink); background: #fff; border: 1px solid #d2d2d7; border-radius: 12px }
.signup input:focus, .signup textarea:focus { outline: 2px solid var(--lt1); outline-offset: 1px; border-color: transparent }
.signup .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px }
.signup fieldset { border: 0; padding: 0; margin: 0; display: flex; gap: 20px; align-items: center; flex-wrap: wrap; font-size: 14px; color: var(--ink-2) }
.signup legend { float: left; margin-right: 6px; color: var(--ink-2) }
.signup .radio { display: inline-flex; gap: 6px; align-items: center; font-size: 15px; color: var(--ink) }
.signup .btn { align-self: flex-start; margin-top: 6px }
.hp { position: absolute; left: -9999px }
.form-status { margin: 0; font-size: 14px; min-height: 1em } .form-status.ok { color: #1a7f37 } .form-status.err { color: var(--lt2) }
.form-note { margin: 0; font-size: 13px; color: var(--ink-3) }
@media (max-width: 560px) { .signup .row2 { grid-template-columns: 1fr } }

/* footer */
.foot { border-top: 1px solid var(--line) }
.foot-in { padding-top: 28px; padding-bottom: 28px; display: flex; flex-wrap: wrap; gap: 16px 24px; font-size: 13px; color: var(--ink-3) }
.foot-links { margin-left: auto; display: flex; flex-wrap: wrap; gap: 20px }
.foot-links a { color: var(--ink-2); text-decoration: none }

/* features page */
.fhero { padding: 64px 0 40px; text-align: center }
.fhero h1 { margin: 0 auto; max-width: 18ch; font: 600 clamp(36px, 5vw, 60px)/1.04 var(--display); letter-spacing: -0.04em; color: var(--navy) }
.sub { margin: 18px auto 0; max-width: 46ch; font-size: 18px; line-height: 1.45; color: var(--ink-3) }
.filter { display: inline-flex; gap: 4px; margin-top: 26px; padding: 4px; background: var(--grey); border-radius: 980px }
.filter button { font: 500 14px var(--sans); padding: 8px 16px; border: 0; border-radius: 980px; background: transparent; color: var(--ink-2); cursor: pointer }
.filter button[aria-pressed=true] { background: #fff; color: var(--ink); box-shadow: 0 1px 3px rgba(0, 0, 0, .12) }
.areas { position: sticky; top: 57px; z-index: 9; background: rgba(255, 255, 255, .85); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid var(--line); border-top: 1px solid var(--line) }
.areas-in { height: 46px; display: flex; gap: 26px; align-items: center; justify-content: center; font-size: 14px; overflow-x: auto; scrollbar-width: none }
.areas a { color: var(--ink-2); text-decoration: none; white-space: nowrap }
.areas a.on { color: var(--ink); font-weight: 600 }
.fgroup { padding: 56px 0 0; background: var(--grey) }
.fgroup:last-of-type { padding-bottom: 72px }
.gh { margin: 0 0 18px; font: 600 clamp(26px, 3.2vw, 36px)/1.1 var(--display); letter-spacing: -0.03em }
.gh span { color: var(--ink-3) }
.feat h3 { margin: 0; font-size: 19px; letter-spacing: -0.02em }
.feat p { margin: 6px 0 0; max-width: 42ch; font-size: 15px; line-height: 1.45; color: var(--ink-3) }
.feat .peek { all: unset; cursor: zoom-in }
.feat .peek img { top: 150px }
.feat .peek:focus-visible img { outline: 3px solid var(--lt1) }
.who { display: block; margin-bottom: 8px; font-size: 12px; font-weight: 600; letter-spacing: .02em; color: var(--ink-3) }
.who.a { color: var(--lt1) } .who.c { color: var(--lt2) }
.cta { padding: 80px 0; text-align: center }
.cta h2 { margin: 0; font: 600 clamp(30px, 4vw, 46px)/1.05 var(--display); letter-spacing: -0.035em; color: var(--navy) }
.cta .btn { margin-top: 26px }
.lightbox { border: 0; padding: 0; background: transparent; max-width: 96vw; max-height: 94vh; overflow: auto }
.lightbox::backdrop { background: rgba(10, 16, 32, .72) }
.lightbox img { display: block; max-width: 96vw; max-height: 94vh; width: auto; height: auto; border-radius: 12px }
.lb-close { position: fixed; top: 16px; right: 20px; width: 44px; height: 44px; font: 28px/1 var(--sans); color: #fff; background: rgba(0, 0, 0, .35); border: 0; border-radius: 50%; cursor: pointer }
.fgroup .bento { grid-template-columns: repeat(2, minmax(0, 1fr)) } .fgroup .span2 { grid-column: auto }
@media (max-width: 860px) { .fgroup .bento { grid-template-columns: minmax(0, 1fr) } }

/* fonts, served from here (Geist and Outfit, SIL Open Font License; Latin subset) */
@font-face { font-family: "Geist"; font-style: normal; font-weight: 400 600; font-display: swap; src: url("fonts/geist.woff2") format("woff2") }
@font-face { font-family: "Outfit"; font-style: normal; font-weight: 500 600; font-display: swap; src: url("fonts/outfit.woff2") format("woff2") }

/* nav: the topic pages drop out of the bar on phones (they stay in the footer) */
@media (max-width: 760px) { .navlinks .wide-only { display: none } }

/* topic pages (coaches, ai, durability) */
.phero { padding: 72px 0 56px; text-align: center; background: linear-gradient(#fff, #f5f5f7) }
.eyebrow { margin: 0; font-size: 19px; font-weight: 600; color: var(--lt1) }
.eyebrow.red { color: var(--lt2) }
.phero h1 { margin: 12px auto 0; max-width: 18ch; font: 600 clamp(36px, 5vw, 60px)/1.04 var(--display); letter-spacing: -0.04em; color: var(--navy); text-wrap: balance }
.phero .sub { max-width: 44ch; font-size: clamp(17px, 1.7vw, 20px); line-height: 1.45 }
.phero .shot { margin: 44px auto 0 }
.band { padding: 88px 0 }
.band.grey { background: var(--grey) }
.head { text-align: center; margin-bottom: 36px }
.head h2 { margin: 10px auto 0; max-width: 20ch; font: 600 clamp(30px, 4vw, 46px)/1.05 var(--display); letter-spacing: -0.035em; text-wrap: balance }
.head p:not(.eyebrow) { margin: 20px auto 0; max-width: 46ch; font-size: 18px; line-height: 1.45; color: var(--ink-3) }
.tile h3 { margin: 0; font-size: 20px; letter-spacing: -0.02em }
.tile p { margin: 10px 0 0; max-width: 42ch; font-size: 15px; line-height: 1.45; color: var(--ink-3) }
.band .tile { background: var(--grey) }
.band.grey .tile { background: #fff }
.prose { max-width: 680px; margin: 0 auto }
.prose h2 { margin: 0; font: 600 clamp(26px, 3.2vw, 36px)/1.1 var(--display); letter-spacing: -0.03em; text-wrap: balance }
.prose h3 { margin: 32px 0 0; font-size: 20px; letter-spacing: -0.02em }
.prose p, .prose li { font-size: 18px; line-height: 1.6; color: var(--ink-2) }
.prose p { margin: 16px 0 0 }
.prose ul { margin: 16px 0 0; padding-left: 22px }
.prose li + li { margin-top: 6px }
.prose strong { color: var(--ink) }
.asks { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px }
.asks blockquote { margin: 0; padding: 22px 24px; border-radius: 20px; background: var(--grey); font: 500 18px/1.4 var(--sans); color: var(--ink) }
.asks blockquote span { display: block; margin-top: 10px; font-size: 13px; font-weight: 600; color: var(--ink-3) }
.facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px }
.facts div { padding: 24px; border-radius: 20px; background: #fff }
.facts b { display: block; font: 600 34px/1 var(--display); letter-spacing: -0.03em; color: var(--navy) }
.facts span { display: block; margin-top: 10px; font-size: 15px; line-height: 1.45; color: var(--ink-3) }
.faq { max-width: 760px; margin: 0 auto }
.faq details { border-bottom: 1px solid var(--line); padding: 20px 0 }
.faq summary { cursor: pointer; font-size: 19px; font-weight: 600; letter-spacing: -0.01em; list-style: none }
.faq summary::-webkit-details-marker { display: none }
.faq summary::after { content: "+"; float: right; color: var(--ink-3); font-weight: 400 }
.faq details[open] summary::after { content: "–" }
.faq details p { margin: 12px 0 0; max-width: 64ch; font-size: 17px; line-height: 1.55; color: var(--ink-2) }
.more { text-align: center; margin-top: 40px } .more a { font-size: 17px; text-decoration: none }
@media (max-width: 860px) { .asks, .facts { grid-template-columns: minmax(0, 1fr) } }

/* 404 */
.lost { padding: 120px 0; text-align: center }
.lost h1 { margin: 0; font: 600 clamp(36px, 5vw, 56px)/1.05 var(--display); letter-spacing: -0.04em; color: var(--navy) }
.lost p { margin: 18px auto 0; font-size: 18px; color: var(--ink-3) }
.points { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px }
.points div { padding: 26px; border-radius: 20px; background: var(--grey) }
.points h3 { margin: 0; font-size: 20px; letter-spacing: -0.02em }
.points p { margin: 10px 0 0; font-size: 15px; line-height: 1.45; color: var(--ink-3) }
@media (max-width: 860px) { .points { grid-template-columns: minmax(0, 1fr) } }