:root {
  color-scheme: light dark;
  --bg: #f8faff;
  --surface: #ffffff;
  --ink: #161f35;
  --muted: #53617a;
  --line: #dce3ef;
  --accent: #285cdb;
  --glow: #e6eeff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1423; --surface: #151f31; --ink: #f2f5ff; --muted: #a9b7d0;
    --line: #2b374d; --accent: #94b5ff; --glow: #14264b;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font-size: 1rem; line-height: 1.6; }
a { color: var(--accent); text-underline-offset: .2em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
.skip { position: fixed; top: .7rem; left: 1rem; padding: .7rem 1rem; background: var(--surface); z-index: 10; transform: translateY(-200%); }
.skip:focus { transform: none; }
.shell { max-width: 82rem; margin-inline: auto; padding-inline: clamp(1.25rem, 4vw, 3.5rem); }
.header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 6.5rem; }
.brand { color: var(--ink); font-size: 1.5rem; font-weight: 750; text-decoration: none; letter-spacing: -.06em; }
.navigation { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem 1.4rem; }
.navigation > a { font-size: .9rem; color: var(--muted); text-decoration: none; padding-block: .65rem; }
.navigation > a:hover { color: var(--accent); }
.app-icon { display: block; width: 7.5rem; height: 7.5rem; border-radius: 27%; margin: 0 auto 1.8rem; box-shadow: 0 1rem 3.5rem -1.5rem var(--accent); }
.eyebrow { color: var(--muted); font-size: .9rem; font-weight: 550; margin: 0 0 1.2rem; }
h1 { font-size: clamp(2.6rem, 6vw, 4.5rem); letter-spacing: -.06em; line-height: 1.08; font-weight: 720; margin: 0 0 1.6rem; text-wrap: balance; }
h1 span { display: block; color: var(--accent); }
.intro { max-width: 39rem; margin: 0 auto; font-size: clamp(1.05rem, 2vw, 1.2rem); color: var(--muted); line-height: 1.75; text-wrap: pretty; }
.hero-note { font-size: .9rem; color: var(--muted); margin: 1.6rem 0 0; }
.app-store-badge { display: inline-flex; max-width: 100%; margin-top: 1.5rem; text-decoration: none; }
.app-store-badge img { display: block; width: min(180px, 100%); height: auto; }
.app-store-badge:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
.footer { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; padding-block: 2rem; color: var(--muted); font-size: .875rem; }
.footer p { margin: 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; }
.footer a { color: var(--muted); padding-block: .5rem; }
.legal { max-width: 47rem; margin-inline: auto; padding-block: 3.5rem; }
.legal h1 { font-size: clamp(2.6rem, 6vw, 3.8rem); }
.legal .intro { font-size: 1.15rem; max-width: none; }
.legal .updated { margin: 1.5rem 0 3rem; font-size: .875rem; color: var(--muted); }
.legal section { margin-block: 2rem; }
.legal h2 { font-size: 1.2rem; line-height: 1.4; letter-spacing: -.02em; margin: 0 0 .65rem; }
.legal section p { color: var(--muted); margin: 0; line-height: 1.8; overflow-wrap: anywhere; }
.legal .policy-links { display: flex; flex-wrap: wrap; gap: .6rem 1.4rem; font-size: .9rem; margin-block: 2rem; }
.error { min-height: 60vh; display: grid; align-content: center; padding-block: 4rem; }
.bookmark { max-width: 42rem; margin-inline: auto; padding-block: 2rem; }
.bookmark-heading { text-align: center; margin-bottom: 2.5rem; }
.bookmark-heading h1 { font-size: clamp(2.3rem, 6vw, 3.6rem); }
.bookmark-question { border: 1px solid var(--line); border-radius: 1.5rem; background: var(--surface); padding: clamp(1rem, 4vw, 2rem); }
.bookmark-question h2 { text-align: center; font-size: 1.3rem; line-height: 1.4; margin: 0; }
.domino-ring { display: block; width: min(100%, 24rem); margin: 1.5rem auto; }
.bookmark-options { padding: 0; list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.bookmark-options li { position: relative; display: flex; justify-content: center; align-items: center; min-height: 5rem; padding: .75rem; border: 1px solid var(--line); border-radius: 1rem; }
.bookmark-options svg { display: block; width: 4rem; height: 7rem; }
.option-letter { position: absolute; top: .65rem; left: .85rem; color: var(--muted); }
.bookmark code { font-family: ui-monospace, monospace; font-size: 1.6rem; }
.bookmark .reference { text-align: center; padding: 1.5rem; }
.bookmark-answer { margin-top: 1.5rem; border-top: 1px solid var(--line); }
.bookmark-answer summary { cursor: pointer; padding-block: 1.25rem; color: var(--accent); font-weight: 650; }
.bookmark-answer li { margin-block: 1rem; }
.bookmark-answer p { color: var(--muted); margin-top: .4rem; overflow-wrap: anywhere; }
.bookmark-install { text-align: center; padding-top: 2rem; }
.bookmark-install h2 { font-size: 1.5rem; letter-spacing: -.035em; }
.bookmark-install p { color: var(--muted); margin-bottom: 0; }
@media (max-width: 640px) {
  .header { min-height: 5.5rem; gap: .5rem; flex-wrap: wrap; padding-block: 1rem; }
  .navigation { gap: .75rem; }
  .app-icon { width: 6.5rem; height: 6.5rem; }
  h1 { letter-spacing: -.045em; }
  .footer { align-items: flex-start; flex-direction: column; }
  .legal { padding-block: 2.5rem; }
}

/* Real app captures keep their full viewport and intrinsic proportions. */
.showcase { --lavender: #eae7fb; --mint: #e2f0e9; --blue: #e4ecfa; }
.showcase h2 { font-size: clamp(2rem, 3.7vw, 3.15rem); letter-spacing: -.05em; line-height: 1.12; margin: 0 0 1.25rem; text-wrap: balance; }
.showcase p { text-wrap: pretty; }
.showcase-hero { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(2rem, 5vw, 5rem); align-items: center; padding-block: 3rem 5rem; }
.hero-copy .app-icon { width: 4.5rem; height: 4.5rem; margin: 0 0 2rem; }
.hero-copy h1 { font-size: clamp(2.8rem, 4.8vw, 4.1rem); }
.hero-copy .intro { margin: 0; max-width: 33rem; font-size: 1.1rem; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.5rem; margin-top: 2rem; }
.hero-actions .app-store-badge { margin: 0; flex: 0 0 auto; }
.hero-actions .app-store-badge img { width: auto; height: 44px; }
.text-link { display: inline-flex; gap: .75rem; align-items: center; font-weight: 650; padding-block: .7rem; }
.hero-stage { display: grid; place-items: center; padding: 2.5rem 1.5rem; background: var(--lavender); border-radius: 3rem; }
.device-shell { position: relative; width: 100%; max-width: 300px; padding: 3px; border-radius: 2.65rem; background: linear-gradient(115deg, #8a909b, #d3d6db 18%, #666d78 42%, #b0b5bd 72%, #6e7580); box-shadow: 0 1.5rem 3rem -1.5rem #18223688; }
.device-shell::before, .device-shell::after { content: ""; position: absolute; width: 3px; background: #737b87; border-radius: 2px; }
.device-shell::before { left: -2px; top: 18%; height: 1.25rem; box-shadow: 0 2rem #737b87, 0 3.7rem #737b87; }
.device-shell::after { right: -2px; top: 28%; height: 3.1rem; }
.phone-frame { width: 100%; border: 6px solid #141820; border-radius: 2.45rem; overflow: hidden; background: #f2f2f7; }
.device-top { display: grid; place-items: center; height: 30px; background: #f2f2f7; }
.device-top span { display: block; width: 30%; height: 16px; border-radius: 20px; background: #101115; position: relative; }
.device-top span::after { content: ""; position: absolute; width: 6px; height: 6px; border-radius: 50%; background: #202a3f; right: 7px; top: 5px; }
.device-bottom { display: grid; place-items: center; height: 15px; }
.device-bottom span { width: 32%; height: 3px; border-radius: 4px; background: #22252b; }
.phone-frame img, .tablet-frame img { display: block; width: 100%; height: auto; }
.showcase-features { padding-block: 3rem 5rem; scroll-margin-top: 2rem; }
.section-heading { max-width: 43rem; margin-bottom: 2.5rem; }
.section-heading > p:last-child, .ipad-copy > p:last-child, .clip-copy > p { color: var(--muted); font-size: 1.1rem; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.feature-card { border: 1px solid var(--line); border-radius: 2rem; overflow: hidden; background: var(--surface); display: flex; flex-direction: column; }
.feature-copy { padding: 1.75rem 1.75rem 1rem; }
.feature-number { font-size: .8rem; font-weight: 650; color: var(--muted); }
.feature-copy h3 { font-size: 1.55rem; line-height: 1.2; letter-spacing: -.04em; margin: 1rem 0; text-wrap: balance; }
.feature-copy p { color: var(--muted); margin: 0; }
.feature-screen { margin-top: auto; padding: 1.5rem; display: grid; place-items: center; }
.feature-screen .device-shell { max-width: 260px; border-radius: 2.15rem; }
.feature-screen .phone-frame { border-width: 5px; border-radius: 1.95rem; }
.feature-explanation .feature-screen { background: var(--blue); }
.feature-adaptive .feature-screen { background: var(--mint); }
.feature-progress .feature-screen { background: var(--lavender); }
.ipad-showcase { display: grid; grid-template-columns: .8fr 1.4fr; gap: 3rem; align-items: center; padding: clamp(1.25rem, 4vw, 3rem); background: var(--mint); border-radius: 2.5rem; margin-block: 1rem 6rem; }
.tablet-frame { border: 8px solid #273046; border-radius: 1.5rem; overflow: hidden; background: #f2f2f7; box-shadow: 0 1.5rem 3rem -2rem #18223688; }
.clip-showcase { display: grid; grid-template-columns: 1.25fr .8fr; align-items: center; gap: 4rem; border-top: 1px solid var(--line); padding-block: 4rem 5rem; }
.clip-actions { display: flex; align-items: flex-start; flex-direction: column; gap: .6rem; margin-top: 1.75rem; }
.clip-copy .clip-note { font-size: .85rem; max-width: 30rem; }
@media (prefers-color-scheme: dark) {
  .showcase { --lavender: #25233e; --mint: #192f2d; --blue: #1b2c49; }
}
@media (max-width: 760px) {
  .showcase-hero, .ipad-showcase, .clip-showcase { grid-template-columns: minmax(0, 1fr); gap: 2rem; }
  .showcase-hero { padding-block: 1.5rem 2.5rem; }
  .hero-copy h1 { font-size: clamp(2.7rem, 8vw, 3.7rem); }
  .hero-stage { border-radius: 2rem; padding: 2rem 1rem; }
  .hero-stage .device-shell { max-width: 260px; }
  .feature-grid { grid-template-columns: minmax(0, 1fr); }
  .feature-copy { padding: 1.5rem; }
  .feature-screen { padding: 1.75rem; }
  .showcase-features { padding-block: 2rem 3rem; }
  .ipad-showcase { margin-block: 0 3rem; border-radius: 2rem; }
  .tablet-frame { border-width: 5px; border-radius: 1rem; }
  .clip-showcase { padding-block: 3rem; }
  .navigation { gap: .75rem; }
  .navigation > a { font-size: .8rem; }
}
@media (max-width: 380px) {
  .header { align-items: flex-start; flex-direction: column; }
  .hero-actions { align-items: flex-start; flex-direction: column; }
}

/* The journal shares the app showcase palette and uses a quieter reading layout. */
.journal { padding-block: 3rem 5rem; }
.journal-heading { max-width: 48rem; margin-bottom: 3rem; }
.journal-heading .intro, .article-heading .intro { margin-left: 0; max-width: 44rem; }
.journal-heading h1, .article-heading h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
.post-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.5rem; }
.post-card { border: 1px solid var(--line); border-radius: 1.75rem; overflow: hidden; background: var(--surface); }
.post-card-heading { padding: 1.75rem; background: var(--glow); }
.post-card-copy { padding: 1.75rem; }
.post-card h3 { font-size: 1.6rem; letter-spacing: -.035em; line-height: 1.25; margin: 0; text-wrap: balance; }
.post-card h3 a { color: var(--ink); text-decoration: none; }
.post-card h3 a:hover { text-decoration: underline; text-decoration-thickness: 1px; }
.post-card p:not(.eyebrow) { color: var(--muted); margin: 0 0 1.25rem; }
.post-card time { color: var(--muted); font-size: .85rem; }
.blog-teaser { padding-block: 1rem 4rem; }
.blog-teaser > h2 { max-width: 45rem; }
.blog-teaser > .text-link { margin-top: 1.5rem; }
.journal-article { padding-block: 2.5rem 4rem; }
.article-heading { max-width: 54rem; margin: 0 auto 3rem; }
.article-heading > .eyebrow { margin-top: 2rem; }
.article-meta { font-size: .875rem; color: var(--muted); margin-top: 1.75rem; }
.article-layout { display: grid; grid-template-columns: 15rem minmax(0, 43rem); justify-content: center; gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.article-toc { border-top: 2px solid var(--line); padding-top: 1rem; }
.article-toc p { font-weight: 650; margin: 0 0 .8rem; }
.article-toc ol { padding-left: 1.2rem; margin: 0; }
.article-toc li { padding-block: .5rem; font-size: .95rem; }
.article-prose { min-width: 0; font-size: 1.075rem; line-height: 1.8; }
.article-prose section { scroll-margin-top: 1.5rem; margin-bottom: 2.5rem; }
.article-prose h2 { font-size: 1.65rem; letter-spacing: -.035em; line-height: 1.25; margin: 0 0 1rem; }
.article-prose p { color: var(--muted); margin: 0 0 1.25rem; }
.article-prose ol { padding-left: 1.5rem; }
.article-prose li { padding-left: .3rem; margin-bottom: 1rem; color: var(--muted); }
.worked-example { background: var(--surface); border: 1px solid var(--line); border-radius: 1.5rem; padding: clamp(1rem, 3vw, 2rem); margin-top: 1.5rem; }
.worked-example .eyebrow { color: var(--accent); }
.worked-example .example-display { border-radius: 1rem; background: var(--glow); color: var(--ink); padding: 1.5rem .75rem; font: 650 clamp(1rem, 3vw, 1.75rem) ui-monospace, monospace; text-align: center; }
.example-figure { margin: 1.5rem 0; }
.example-figure figcaption { color: var(--ink); font-size: 1rem; line-height: 1.6; }
.article-practice { padding-top: 2rem; border-top: 1px solid var(--line); }
.article-practice .text-link { display: flex; }
.article-practice .app-store-badge { margin-top: .5rem; }
.related-posts { margin-top: 4rem; padding-top: 2rem; border-top: 1px solid var(--line); }
.related-posts > h2 { font-size: 2rem; letter-spacing: -.04em; }
@media (max-width: 760px) {
  .journal { padding-block: 2rem 3rem; }
  .post-grid, .article-layout { grid-template-columns: minmax(0, 1fr); }
  .article-layout { gap: 2rem; }
  .article-heading { margin-bottom: 2rem; }
  .article-prose { font-size: 1rem; }
  .post-card-heading, .post-card-copy { padding: 1.5rem; }
  .navigation { column-gap: 1rem; }
}

.brand-button { display: inline-flex; justify-content: center; align-items: center; gap: .65rem; min-height: 44px; min-width: 160px; max-width: 100%; padding: .65rem 1rem; border-radius: .5rem; border: 1px solid #ffffff45; background: linear-gradient(145deg, #0073dc, #005edb); color: #fff; font-size: 1rem; font-weight: 700; line-height: 1.2; text-decoration: none; box-shadow: inset 0 1px 0 #ffffff30; }
.brand-button:hover { background: linear-gradient(145deg, #006bd0, #0051bf); }
.domino-preview { padding: 1.5rem; background: var(--surface); border: 1px solid var(--line); border-radius: 2rem; }
.domino-preview h3 { font-size: 1.3rem; line-height: 1.4; text-align: center; margin: 0; }
.domino-preview .domino-ring { margin-block: 1rem; }
.domino-preview-options { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); list-style: none; padding: 0; gap: .5rem; margin: 0; }
.domino-preview-options li { display: grid; justify-items: center; border: 1px solid var(--line); border-radius: .75rem; padding: .5rem; }
.domino-preview-options span { justify-self: start; font-size: .8rem; color: var(--muted); }
.domino-preview-options svg { width: 100%; max-width: 50px; height: auto; }
#app-clip { scroll-margin-top: 2rem; }