:root {
  color-scheme: light;
  --ink: #1d1d1f;
  --muted: #68686d;
  --subtle: #8a8a90;
  --line: #e8e8ed;
  --surface: #ffffff;
  --surface-soft: #f5f5f7;
  --blue: #007aff;
  --blue-dark: #0066d6;
  --blue-soft: #edf6ff;
  --purple: #6657eb;
  --max: 1120px;
  --reading: 720px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  transform: translateY(-160%);
  border-radius: 10px;
  background: var(--ink);
  color: white;
  padding: 10px 14px;
  text-decoration: none;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(232, 232, 237, 0.9);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(18px) saturate(180%);
}

.site-header__inner {
  width: min(calc(100% - 40px), var(--max));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand__icon {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  object-fit: cover;
  box-shadow: 0 5px 12px rgba(38, 24, 94, 0.2);
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 24px;
}

.site-nav__link {
  color: #55555a;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.site-nav__link:hover,
.site-nav__link[aria-current="page"] {
  color: var(--ink);
}

.app-store-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 999px;
  background: var(--blue);
  color: white;
  padding: 0 19px;
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
  transition: background 160ms ease, transform 160ms ease;
}

.app-store-button:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
}

.app-store-button:focus-visible,
.site-nav__link:focus-visible,
.brand:focus-visible,
.text-link:focus-visible,
.article-card:focus-within {
  outline: 3px solid rgba(0, 122, 255, 0.28);
  outline-offset: 3px;
}

.blog-hero {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
  padding: 92px 0 44px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.blog-hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(46px, 7vw, 76px);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.blog-hero__intro {
  max-width: 650px;
  margin: 23px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.55;
  letter-spacing: -0.015em;
}

.featured-wrap,
.blog-values,
.blog-cta,
.site-footer__inner {
  width: min(calc(100% - 40px), var(--max));
  margin-left: auto;
  margin-right: auto;
}

.featured-card {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: #fbfbfd;
  box-shadow: 0 24px 70px rgba(29, 29, 31, 0.07);
}

.featured-card__copy {
  padding: clamp(34px, 6vw, 72px);
}

.topic {
  display: inline-block;
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.065em;
  text-transform: uppercase;
}

.featured-card h2 {
  margin: 15px 0 16px;
  font-size: clamp(32px, 4.5vw, 52px);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.featured-card p {
  margin: 0 0 26px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.62;
}

.article-meta {
  color: var(--subtle);
  font-size: 13px;
}

.text-link {
  display: inline-flex;
  margin-top: 24px;
  color: var(--blue-dark);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.featured-card__visual,
.article-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
  min-height: 480px;
  background:
    radial-gradient(circle at 22% 18%, rgba(255, 255, 255, 0.72), transparent 22%),
    radial-gradient(circle at 78% 78%, rgba(82, 59, 225, 0.35), transparent 30%),
    linear-gradient(145deg, #d8ecff 0%, #b7cfff 44%, #c3adff 100%);
}

.featured-card__visual::before,
.article-hero::before {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 50%;
}

.watch {
  position: relative;
  z-index: 1;
  width: 194px;
  height: 228px;
  display: grid;
  place-items: center;
  border: 12px solid #24242b;
  border-radius: 52px;
  background: linear-gradient(165deg, #16161c, #2a2935);
  box-shadow: 0 38px 60px rgba(39, 36, 76, 0.32), inset 0 0 0 2px #55545e;
  color: white;
}

.watch::before,
.watch::after {
  content: "";
  position: absolute;
  left: 50%;
  z-index: -1;
  width: 86px;
  height: 165px;
  transform: translateX(-50%);
  border-radius: 34px;
  background: linear-gradient(90deg, #373742, #1e1e25 45%, #3c3b47);
}

.watch::before {
  bottom: calc(100% - 7px);
}

.watch::after {
  top: calc(100% - 7px);
}

.watch__screen {
  width: 100%;
  text-align: center;
}

.watch__label {
  display: block;
  color: #b7b7c2;
  font-size: 12px;
  font-weight: 600;
}

.watch__count {
  display: block;
  margin: 15px 0 18px;
  font-size: 62px;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.07em;
  line-height: 1;
}

.watch__tap {
  width: 46px;
  height: 46px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  background: var(--blue);
  font-size: 29px;
  line-height: 1;
}

.blog-values {
  padding: 104px 0 98px;
}

.section-heading {
  max-width: 620px;
  margin: 0 0 38px;
  font-size: clamp(34px, 4vw, 50px);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.value-item {
  border-top: 1px solid var(--line);
  padding: 24px 2px 0;
}

.value-item h3 {
  margin: 0 0 9px;
  font-size: 19px;
  letter-spacing: -0.02em;
}

.value-item p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

.blog-cta {
  margin-bottom: 88px;
  display: flex;
  align-items: center;
  gap: 28px;
  border-radius: 24px;
  background: var(--blue-soft);
  padding: 30px 34px;
}

.blog-cta h2 {
  margin: 0 0 6px;
  font-size: 22px;
  letter-spacing: -0.025em;
}

.blog-cta p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.blog-cta .app-store-button {
  margin-left: auto;
  flex: 0 0 auto;
}

.article-shell {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
  padding: 38px 0 96px;
}

.breadcrumbs {
  margin: 0 0 54px;
  color: var(--subtle);
  font-size: 13px;
}

.breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
}

.breadcrumbs a:hover {
  text-decoration: underline;
}

.article-header {
  max-width: 860px;
  margin: 0 auto;
}

.article-header h1 {
  margin: 15px 0 22px;
  font-size: clamp(46px, 7vw, 78px);
  line-height: 0.99;
  letter-spacing: -0.055em;
}

.article-deck {
  max-width: 740px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.5;
  letter-spacing: -0.017em;
}

.byline {
  margin-top: 25px;
  display: flex;
  flex-wrap: wrap;
  gap: 7px 14px;
  color: var(--subtle);
  font-size: 13px;
}

.byline strong {
  color: var(--ink);
}

.article-hero {
  min-height: 510px;
  margin: 48px 0 62px;
  border-radius: 30px;
}

.article-hero .watch {
  transform: scale(1.15) rotate(4deg);
}

.article-layout {
  display: grid;
  grid-template-columns: 180px minmax(0, var(--reading));
  justify-content: center;
  gap: 54px;
}

.table-of-contents {
  position: sticky;
  top: 105px;
  align-self: start;
  border-left: 1px solid var(--line);
  padding-left: 18px;
}

.table-of-contents strong {
  display: block;
  margin-bottom: 12px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.table-of-contents a {
  display: block;
  margin: 9px 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.35;
  text-decoration: none;
}

.table-of-contents a:hover {
  color: var(--blue-dark);
}

.article-body {
  min-width: 0;
  color: #343438;
  font-family: ui-serif, Georgia, Cambria, "Times New Roman", serif;
  font-size: 18px;
  line-height: 1.78;
}

.article-body > *:first-child {
  margin-top: 0;
}

.article-body p,
.article-body ul,
.article-body ol {
  margin: 0 0 24px;
}

.article-body h2,
.article-body h3,
.article-body .quick-answer,
.article-body .inline-cta,
.article-body .source-list,
.article-body .related-reading {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

.article-body h2 {
  scroll-margin-top: 105px;
  margin: 64px 0 18px;
  color: var(--ink);
  font-size: 34px;
  line-height: 1.12;
  letter-spacing: -0.04em;
}

.article-body h3 {
  margin: 36px 0 13px;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.article-body li {
  margin-bottom: 10px;
  padding-left: 4px;
}

.article-body a {
  color: var(--blue-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.article-body a.app-store-button {
  background: #0062cc;
  color: #ffffff;
  text-decoration: none;
}

.article-body a.app-store-button:hover {
  background: #004fa8;
  color: #ffffff;
  text-decoration: none;
}

.quick-answer {
  margin-bottom: 38px;
  border-left: 4px solid var(--blue);
  border-radius: 0 14px 14px 0;
  background: var(--blue-soft);
  padding: 22px 24px;
  color: #2e3b4c;
  font-size: 16px;
  line-height: 1.6;
}

.quick-answer strong {
  display: block;
  margin-bottom: 5px;
  color: var(--ink);
}

.inline-cta {
  margin: 42px 0;
  border: 1px solid #d7e8fb;
  border-radius: 18px;
  background: #f7fbff;
  padding: 24px;
}

.inline-cta__top {
  display: flex;
  align-items: center;
  gap: 14px;
}

.inline-cta__icon {
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  border-radius: 13px;
  object-fit: cover;
  box-shadow: 0 5px 14px rgba(38, 24, 94, 0.2);
}

.inline-cta h2,
.inline-cta h3 {
  margin: 0;
  font-size: 19px;
  letter-spacing: -0.02em;
}

.inline-cta p {
  margin: 12px 0 18px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

.inline-cta .app-store-button {
  min-height: 40px;
  font-size: 13px;
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 30px 0 36px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

.use-case {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 21px;
}

.use-case h3 {
  margin: 0 0 8px;
  font-size: 17px;
}

.use-case p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.faq-list {
  margin-top: 24px;
  border-top: 1px solid var(--line);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
}

.faq-list details {
  border-bottom: 1px solid var(--line);
  padding: 19px 0;
}

.faq-list summary {
  cursor: pointer;
  color: var(--ink);
  font-size: 17px;
  font-weight: 650;
  list-style-position: outside;
}

.faq-list details p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.source-list,
.related-reading {
  margin-top: 54px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.source-list h2,
.related-reading h2 {
  margin: 0 0 13px;
  font-size: 20px;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #fafafa;
}

.site-footer__inner {
  min-height: 122px;
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--subtle);
  font-size: 13px;
}

.footer-links {
  margin-left: auto;
  display: flex;
  gap: 18px;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

@media (max-width: 900px) {
  .featured-card {
    grid-template-columns: 1fr;
  }

  .featured-card__visual {
    min-height: 390px;
  }

  .article-layout {
    display: block;
  }

  .table-of-contents {
    position: static;
    margin: 0 auto 42px;
    max-width: var(--reading);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 18px 20px;
  }

  .table-of-contents a {
    display: inline-block;
    margin: 5px 18px 5px 0;
  }

  .article-body {
    max-width: var(--reading);
    margin: 0 auto;
  }
}

@media (max-width: 680px) {
  .site-header__inner {
    width: min(calc(100% - 28px), var(--max));
    min-height: 64px;
  }

  .brand__icon {
    width: 35px;
    height: 35px;
  }

  .site-nav {
    gap: 12px;
  }

  .site-nav__link {
    display: none;
  }

  .app-store-button {
    min-height: 39px;
    padding: 0 15px;
    font-size: 13px;
  }

  .blog-hero,
  .featured-wrap,
  .blog-values,
  .blog-cta,
  .site-footer__inner,
  .article-shell {
    width: min(calc(100% - 28px), var(--max));
  }

  .blog-hero {
    padding: 64px 0 34px;
  }

  .featured-card {
    border-radius: 20px;
  }

  .featured-card__copy {
    padding: 30px 24px 34px;
  }

  .featured-card__visual {
    min-height: 350px;
  }

  .blog-values {
    padding: 74px 0 68px;
  }

  .value-grid,
  .use-case-grid {
    grid-template-columns: 1fr;
  }

  .blog-cta {
    display: block;
    margin-bottom: 64px;
    padding: 25px;
  }

  .blog-cta .app-store-button {
    margin-top: 19px;
  }

  .breadcrumbs {
    margin-bottom: 40px;
  }

  .article-header h1 {
    font-size: clamp(42px, 13vw, 60px);
  }

  .article-hero {
    min-height: 380px;
    margin: 36px 0 44px;
    border-radius: 21px;
  }

  .article-hero .watch {
    transform: scale(0.9) rotate(4deg);
  }

  .article-body {
    font-size: 17px;
    line-height: 1.74;
  }

  .article-body h2 {
    margin-top: 52px;
    font-size: 30px;
  }

  .site-footer__inner {
    min-height: 150px;
    display: block;
    padding: 36px 0;
  }

  .footer-links {
    margin: 17px 0 0;
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .app-store-button {
    transition: none;
  }
}