:root {
  color-scheme: light;
  --blog-ink: #071c25;
  --blog-ink-soft: #17333d;
  --blog-cream: #f6f0e5;
  --blog-paper: #fffaf0;
  --blog-cyan: #27c5e8;
  --blog-apricot: #ffc3a1;
  --blog-lavender: #d8c9ef;
  --blog-blue: #bfdff1;
  --blog-pink: #f1b8d2;
  --blog-line: rgba(7, 28, 37, 0.2);
  --blog-line-soft: rgba(7, 28, 37, 0.1);
  --blog-hard-shadow: 0.5rem 0.55rem 0 var(--blog-ink);
  --paper: var(--blog-cream);
  --paper2: var(--blog-paper);
  --ink: var(--blog-ink);
  --muted: #40535a;
  --soft: #607177;
  --line: var(--blog-line-soft);
  --line2: var(--blog-line);
  --blue: #0a7ea3;
  --cyan: var(--blog-cyan);
  --pink: var(--blog-pink);
  --violet: var(--blog-lavender);
  --warm: #ef8753;
  --cream: var(--blog-paper);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--blog-cream);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: clip;
  background:
    radial-gradient(circle at 10% 2%, rgba(39, 197, 232, 0.12), transparent 30rem),
    radial-gradient(circle at 90% 0%, rgba(216, 201, 239, 0.18), transparent 28rem),
    var(--blog-cream);
  color: var(--blog-ink);
  font-family: "Archivo", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  z-index: 100;
  inset: 0;
  pointer-events: none;
  opacity: 0.105;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23grain)' opacity='.55'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

a {
  color: inherit;
  text-decoration-color: rgba(7, 28, 37, 0.35);
  text-underline-offset: 0.2em;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--blog-cyan);
  outline-offset: 4px;
}

.progress {
  position: fixed;
  z-index: 90;
  right: 0;
  bottom: 0;
  left: 0;
  width: 0;
  height: 4px;
  background: var(--blog-cyan);
  box-shadow: none;
}

.topbar {
  position: sticky;
  z-index: 80;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.5rem;
  border-bottom: 1.5px solid var(--blog-ink);
  padding: 0.75rem clamp(1rem, 4vw, 2.25rem);
  background: color-mix(in oklab, var(--blog-cream) 90%, transparent);
  backdrop-filter: blur(18px);
}

.lockup,
.topbar .mode,
.kicker,
.meta,
.eyebrow,
.section-title,
.card-meta,
.index-footer,
.related h4,
.source-list h4 {
  color: var(--blog-ink);
  font-family: "Space Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  min-height: 2.75rem;
  text-decoration: none;
}

.lockup img {
  display: block;
  width: 2.25rem;
  height: 2.25rem;
  object-fit: contain;
}

/* Article pages: intentionally quiet and readable. */
.page {
  width: min(calc(100% - 2rem), 68rem);
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 5.5rem) 0 5rem;
}

.page .hero {
  position: relative;
  margin: 0 0 clamp(4rem, 9vw, 7rem);
  border: 0;
  padding: clamp(1rem, 4vw, 3rem) 0 0;
  background: transparent;
  box-shadow: none;
  isolation: isolate;
}

.page .hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -1.5rem;
  right: -10rem;
  width: min(31rem, 52vw);
  height: 8.5rem;
  border: 1.5px solid var(--blog-ink);
  border-radius: 999px;
  background: var(--blog-blue);
  box-shadow: 0.32rem 0.36rem 0 var(--blog-ink);
  opacity: 0.72;
  transform: rotate(-3deg);
}

.gradient-line {
  width: 4.5rem;
  height: 0.72rem;
  margin: 0 0 2.4rem;
  border: 1.5px solid var(--blog-ink);
  border-radius: 999px;
  background: var(--blog-apricot);
}

.page .hero h1 {
  max-width: 13ch;
  margin: 0;
  color: var(--blog-ink);
  font-family: "Archivo", "Arial Black", Arial, sans-serif;
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 900;
  letter-spacing: -0.072em;
  line-height: 0.89;
  text-wrap: balance;
}

.page .hero .subtitle {
  max-width: 42rem;
  margin: 2rem 0 0;
  color: var(--blog-ink-soft);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  font-weight: 650;
  line-height: 1.5;
}

.page .hero .meta {
  margin-top: 1.35rem;
  color: #52666d;
}

.article,
.source-list,
.signature {
  width: min(100%, 68ch);
  max-width: 68ch;
  margin-right: auto;
  margin-left: auto;
}

.article {
  padding-bottom: 2rem;
}

.insight {
  margin: 0 0 clamp(3rem, 7vw, 5.25rem);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin: 0 0 1rem;
  color: #496069;
}

.eyebrow svg {
  flex: 0 0 auto;
}

.noise-path {
  stroke: #ef8753;
}

.signal-path {
  stroke: #0a7ea3;
}

.article h2,
.article .insight h2 {
  margin: 0 0 1rem;
  color: var(--blog-ink);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 850;
  letter-spacing: -0.048em;
  line-height: 1.02;
  text-wrap: balance;
}

.article h3 {
  margin: 2rem 0 0.7rem;
  color: var(--blog-ink);
  font-size: 1.22rem;
  line-height: 1.25;
}

.article p,
.article li {
  color: #314951;
  font-size: clamp(1.04rem, 1.7vw, 1.16rem);
  line-height: 1.76;
}

.article p {
  margin: 0 0 1.2rem;
}

.article ul,
.article ol {
  margin: 0 0 1.3rem;
  padding-left: 1.35rem;
}

.callout,
.note,
.quote,
.stat,
.cta,
.related-list a,
.grid-card,
figure.case,
.step,
.self-check {
  border: 1.5px solid var(--blog-ink);
  border-radius: 1rem;
  background: var(--blog-paper);
  box-shadow: 0.28rem 0.32rem 0 rgba(7, 28, 37, 0.13);
}

.callout,
.note,
.quote {
  margin: 2rem 0;
  padding: clamp(1.2rem, 3vw, 1.7rem);
  color: #314951;
}

.callout strong,
.callout b,
.note strong,
.quote strong {
  color: var(--blog-ink);
}

.stat-row,
.grid-cards {
  gap: 1rem;
}

.stat,
.grid-card {
  padding: 1.2rem;
}

.stat .num,
.grid-card .n,
.step time {
  color: #087798;
}

.steps {
  gap: 1rem;
}

.step {
  padding: 1.2rem;
}

figure.case {
  overflow: hidden;
  margin: 1.5rem 0 3rem;
}

figure.case figcaption {
  border-top: 1.5px solid var(--blog-ink);
  padding: 1rem 1.1rem;
  color: #52666d;
}

.cta {
  margin-top: 3.5rem;
  padding: clamp(1.4rem, 4vw, 2rem);
  background: var(--blog-lavender);
  box-shadow: 0.38rem 0.42rem 0 var(--blog-ink);
}

.cta h2,
.cta h3 {
  margin-top: 0;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.btn,
.button,
.check-submit,
.check-reset {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  border: 1.5px solid var(--blog-ink);
  border-radius: 999px;
  padding: 0 1.15rem;
  background: var(--blog-ink);
  color: var(--blog-paper);
  box-shadow: 0.18rem 0.2rem 0 var(--blog-apricot);
  font-family: "Space Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-decoration: none;
  text-transform: uppercase;
}

.button-secondary,
.check-reset {
  background: var(--blog-paper);
  color: var(--blog-ink);
}

.related {
  margin-top: 3.5rem;
}

.related-list {
  display: grid;
  gap: 0.75rem;
}

.related-list a {
  gap: 1rem;
  padding: 1rem 1.1rem;
  color: var(--blog-ink);
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.source-list {
  margin-top: 4rem;
}

.source-list li {
  color: #52666d;
  font-size: 0.9rem;
  line-height: 1.6;
}

.signature {
  margin-top: 3rem;
  border-top: 1.5px solid var(--blog-ink);
  padding-top: 1.4rem;
  color: #52666d;
  text-align: center;
}

.self-check {
  overflow: hidden;
  background: var(--blog-paper);
  box-shadow: 0.4rem 0.45rem 0 var(--blog-ink);
}

.self-check__head {
  border-bottom: 1.5px solid var(--blog-ink);
  background: var(--blog-blue);
}

.check-option {
  border-color: var(--blog-line);
  background: var(--blog-cream);
}

.check-option:has(input:checked) {
  border-color: var(--blog-ink);
  background: var(--blog-blue);
}

/* Blog hub: the expressive editorial layer. */
.blog-index {
  background:
    radial-gradient(circle at 85% 9%, rgba(246, 240, 229, 0.6), transparent 20rem),
    var(--blog-cyan);
}

.blog-index::after {
  content: "";
  position: fixed;
  z-index: -1;
  top: 6rem;
  right: -8rem;
  width: 26rem;
  height: 7rem;
  border: 1.5px solid var(--blog-ink);
  border-radius: 999px;
  background: var(--blog-cream);
  box-shadow: 0.4rem 0.45rem 0 var(--blog-ink);
  transform: rotate(-5deg);
}

.index-page {
  position: relative;
  width: min(calc(100% - 2rem), 76rem);
  margin: 0 auto;
  padding: 1rem 0 5rem;
}

.index-top {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4.35rem;
  margin-bottom: clamp(2rem, 6vw, 4.5rem);
  border: 1.5px solid var(--blog-ink);
  border-radius: 1rem;
  padding: 0.65rem 1rem;
  background: var(--blog-cream);
  box-shadow: 0.36rem 0.4rem 0 var(--blog-ink);
}

.index-intro {
  position: relative;
  z-index: 1;
  max-width: none;
  margin-bottom: clamp(4rem, 8vw, 7rem);
  border: 1.5px solid var(--blog-ink);
  border-radius: 1.35rem;
  padding: clamp(1.6rem, 5vw, 4.5rem);
  overflow: hidden;
  background: var(--blog-ink);
  color: var(--blog-cream);
  box-shadow: 0.65rem 0.7rem 0 var(--blog-apricot);
}

.index-intro::before,
.index-intro::after {
  content: "";
  position: absolute;
  right: -5rem;
  width: 21rem;
  height: 5.5rem;
  border: 1.5px solid var(--blog-cream);
  border-radius: 999px;
  opacity: 0.16;
  transform: rotate(-8deg);
}

.index-intro::before {
  top: 2rem;
}

.index-intro::after {
  top: 8.4rem;
  right: -9rem;
}

.index-intro .kicker,
.index-intro p {
  position: relative;
  z-index: 1;
  color: var(--blog-cream);
}

.index-intro .kicker {
  display: inline-flex;
  border: 1.5px solid var(--blog-cream);
  border-radius: 999px;
  padding: 0.52rem 0.72rem;
  background: var(--blog-apricot);
  color: var(--blog-ink);
}

.index-intro h1 {
  position: relative;
  z-index: 1;
  max-width: 10ch;
  margin: 1.5rem 0 0;
  color: var(--blog-cream);
  font-size: clamp(3.3rem, 10vw, 8.5rem);
  font-weight: 900;
  letter-spacing: -0.078em;
  line-height: 0.84;
  text-wrap: balance;
}

.index-intro p {
  max-width: 50ch;
  margin: 1.8rem 0 0;
  font-size: clamp(1rem, 1.7vw, 1.25rem);
  font-weight: 620;
  line-height: 1.5;
  opacity: 0.82;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2.8rem, 6vw, 5rem) clamp(1.2rem, 3vw, 2.4rem);
  counter-reset: article;
}

.post-card {
  display: block;
  min-width: 0;
  color: var(--blog-ink);
  text-decoration: none;
  counter-increment: article;
}

.thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1.5px solid var(--blog-ink);
  border-radius: 1.15rem;
  background: var(--blog-apricot);
  box-shadow: var(--blog-hard-shadow);
  transition: transform 240ms cubic-bezier(0.16, 1, 0.3, 1), box-shadow 240ms cubic-bezier(0.16, 1, 0.3, 1);
}

.thumb::before {
  content: "";
  position: absolute;
  top: 12%;
  right: -11%;
  width: 66%;
  height: 29%;
  border: 1.5px solid var(--blog-ink);
  border-radius: 999px;
  background: color-mix(in oklab, var(--blog-cream) 78%, transparent);
  transform: rotate(-8deg);
}

.thumb::after {
  content: counter(article, decimal-leading-zero);
  position: absolute;
  top: 0.85rem;
  left: 1rem;
  font-family: "Space Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.post-card:nth-child(4n + 2) .thumb { background: var(--blog-lavender); }
.post-card:nth-child(4n + 3) .thumb { background: var(--blog-blue); }
.post-card:nth-child(4n) .thumb { background: var(--blog-pink); }

.thumb-mark {
  position: absolute;
  z-index: 1;
  bottom: 1.15rem;
  left: 1.15rem;
  max-width: 8ch;
  color: var(--blog-ink);
  font-size: clamp(2.25rem, 5vw, 4.7rem);
  font-weight: 900;
  letter-spacing: -0.078em;
  line-height: 0.82;
  text-transform: uppercase;
}

.duration {
  position: absolute;
  z-index: 2;
  right: 0.8rem;
  bottom: 0.8rem;
  border: 1.5px solid var(--blog-ink);
  border-radius: 999px;
  padding: 0.35rem 0.55rem;
  background: var(--blog-cream);
  color: var(--blog-ink);
  font-family: "Space Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.post-body {
  display: block;
  padding: 1.35rem 0 0 0.2rem;
}

.avatar {
  display: none;
}

.post-copy h2 {
  max-width: 30ch;
  margin: 0;
  color: var(--blog-ink);
  font-size: clamp(1.25rem, 2.2vw, 1.75rem);
  font-weight: 820;
  letter-spacing: -0.038em;
  line-height: 1.1;
  text-wrap: balance;
}

.card-meta {
  display: block;
  max-width: 60ch;
  margin-top: 0.72rem;
  color: var(--blog-ink-soft);
  font-size: 0.69rem;
  line-height: 1.55;
  opacity: 0.7;
}

.index-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 6rem;
  border-top: 1.5px solid var(--blog-ink);
  padding-top: 1.3rem;
}

@media (hover: hover) and (pointer: fine) {
  .post-card:hover .thumb,
  .post-card:focus-visible .thumb {
    transform: translate(-0.25rem, -0.35rem);
    box-shadow: 0.82rem 0.9rem 0 var(--blog-ink);
  }

  .related-list a:hover {
    transform: translate(-0.1rem, -0.12rem);
    box-shadow: 0.38rem 0.42rem 0 rgba(7, 28, 37, 0.15);
  }
}

@media (max-width: 700px) {
  .topbar {
    min-height: 4rem;
    padding: 0.6rem 0.75rem;
  }

  .topbar .mode {
    font-size: 0.63rem;
  }

  .page {
    width: min(calc(100% - 1.25rem), 68rem);
    padding-top: 1.4rem;
  }

  .page .hero {
    margin-bottom: 4rem;
  }

  .page .hero::before {
    top: -0.5rem;
    right: -0.5rem;
    width: 16rem;
    height: 4.8rem;
  }

  .page .hero h1 {
    font-size: clamp(2.8rem, 15vw, 5rem);
  }

  .article p,
  .article li {
    font-size: 1.03rem;
    line-height: 1.7;
  }

  .grid-cards,
  .step {
    grid-template-columns: 1fr;
  }

  .index-page {
    width: min(calc(100% - 1.25rem), 76rem);
  }

  .index-top {
    min-height: 3.8rem;
    margin-bottom: 1.8rem;
    padding: 0.5rem 0.75rem;
    box-shadow: 0.28rem 0.32rem 0 var(--blog-ink);
  }

  .index-intro {
    border-radius: 1rem;
    box-shadow: 0.42rem 0.48rem 0 var(--blog-apricot);
  }

  .index-intro h1 {
    font-size: clamp(3rem, 17vw, 5.5rem);
  }

  .video-grid {
    grid-template-columns: 1fr;
    gap: 3.4rem;
  }

  .thumb {
    box-shadow: 0.38rem 0.42rem 0 var(--blog-ink);
  }

  .thumb-mark {
    font-size: clamp(2.4rem, 13vw, 4rem);
  }

  .index-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

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

  .insight,
  .noise-path,
  .signal-path,
  .thumb,
  .related-list a,
  .check-option {
    transition: none !important;
  }

  .insight,
  .js .insight {
    opacity: 1;
    transform: none;
  }
}