:root {
  --magenta: #ec0f8c;
  --cyan: #00aeef;
  --lime: #d6df21;
  --dark: #0f172a;
  --slate: #475569;
  --muted: #f8fafc;
  --soft: #f8fafc;
  --white: #ffffff;
  --line: rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--dark);
  background: var(--white);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
  color: inherit;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px max(20px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

.brand img {
  display: block;
  width: 158px;
  height: auto;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.35vw, 22px);
  color: #334155;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

nav a,
.nav-menu-trigger {
  white-space: nowrap;
}

nav a,
.header-cta,
.button {
  text-decoration: none;
}

nav > a,
.nav-menu-trigger,
.header-cta,
.button.primary {
  transition: color 0.18s ease, background-color 0.18s ease, filter 0.18s ease;
}

nav > a:hover,
nav > a:focus-visible,
nav > a[aria-current="page"],
.nav-menu-trigger:hover,
.nav-menu-trigger:focus-visible {
  color: var(--magenta);
}

.nav-menu {
  position: relative;
}

.nav-menu::after {
  content: "";
  position: absolute;
  top: 100%;
  left: -18px;
  right: -18px;
  height: 18px;
}

.nav-menu-trigger {
  border: 0;
  padding: 0;
  color: inherit;
  background: transparent;
  font: inherit;
  cursor: pointer;
  text-transform: inherit;
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  z-index: 30;
  display: grid;
  gap: 4px;
  min-width: 260px;
  padding: 10px;
  border: 1px solid rgba(15, 23, 42, 0.1);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 24px 70px rgba(15, 23, 42, 0.16);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 8px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.nav-menu:hover .nav-dropdown,
.nav-menu:focus-within .nav-dropdown,
.nav-menu.is-open .nav-dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 0);
}

.nav-dropdown a {
  display: block;
  padding: 12px 14px;
  border-radius: 6px;
  color: #334155;
  white-space: nowrap;
}

.nav-dropdown a:hover {
  color: var(--magenta);
  background: var(--soft);
}

.header-cta {
  display: inline-flex;
  padding: 13px 18px;
  border-radius: 8px;
  color: var(--white);
  background: var(--magenta);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-cta:hover,
.header-cta:focus-visible,
.button.primary:hover,
.button.primary:focus-visible {
  filter: brightness(0.94);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: clamp(44px, 4.8vw, 68px);
  line-height: 0.96;
}

h2 {
  margin-bottom: 22px;
  font-size: clamp(30px, 3.2vw, 46px);
  line-height: 1.08;
}

h3 {
  margin-bottom: 12px;
  font-size: 24px;
  line-height: 1.1;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.eyebrow.dark {
  color: var(--magenta);
}

.hero {
  position: relative;
  min-height: auto;
  padding: 176px max(20px, calc((100vw - 1180px) / 2)) 106px;
  color: var(--white);
  background: var(--dark);
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(135deg, rgba(236, 15, 140, 0.25), transparent 34%),
    linear-gradient(35deg, rgba(0, 174, 239, 0.18), transparent 48%),
    var(--dark);
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.32;
  background-image:
    linear-gradient(120deg, transparent 0 43%, rgba(255, 255, 255, 0.11) 43.2% 43.8%, transparent 44% 100%),
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: auto, 46px 46px, 46px 46px;
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(340px, 0.68fr);
  align-items: center;
  gap: clamp(32px, 5vw, 68px);
  max-width: 1180px;
  margin-inline: auto;
}

.hero-copy {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(19px, 1.55vw, 22px);
  line-height: 1.48;
  font-weight: 650;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 17px 24px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.button.primary {
  color: var(--white);
  background: var(--magenta);
  box-shadow: 0 18px 50px rgba(236, 15, 140, 0.28);
}

.button.secondary {
  border: 1px solid rgba(255, 255, 255, 0.32);
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.hero-library-card {
  display: grid;
  gap: 14px;
  width: 100%;
  max-width: 500px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(236, 15, 140, 0.16), rgba(0, 174, 239, 0.1)),
    rgba(255, 255, 255, 0.07);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.24);
}

.library-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: start;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.library-row span {
  grid-row: span 2;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  color: var(--dark);
  background: var(--lime);
  font-size: 13px;
  font-weight: 900;
}

.library-row strong {
  color: var(--white);
  font-size: 18px;
  line-height: 1.1;
  text-transform: uppercase;
}

.library-row p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  line-height: 1.45;
  font-weight: 700;
}

.library-row:nth-child(odd) span,
.library-row.active span {
  background: var(--cyan);
}

.section {
  padding: 104px max(20px, calc((100vw - 1180px) / 2));
  scroll-margin-top: 108px;
}

.latest-section {
  background:
    linear-gradient(135deg, rgba(236, 15, 140, 0.07), transparent 34%),
    linear-gradient(35deg, rgba(0, 174, 239, 0.09), transparent 48%),
    linear-gradient(rgba(15, 23, 42, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.035) 1px, transparent 1px),
    var(--soft);
  background-size: auto, auto, 34px 34px, 34px 34px;
}

.section-heading {
  max-width: 850px;
  margin: 0 0 42px;
}

.section-heading.centered {
  max-width: 940px;
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.section-heading p:not(.eyebrow) {
  color: var(--slate);
  font-size: 20px;
  line-height: 1.5;
  font-weight: 700;
}

.featured-post {
  display: grid;
  grid-template-columns: minmax(360px, 0.9fr) minmax(0, 0.8fr);
  gap: 0;
  overflow: hidden;
  max-width: 1180px;
  margin-inline: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 30px 90px rgba(15, 23, 42, 0.1);
  text-decoration: none;
}

.featured-image {
  display: grid;
  place-items: center;
  min-height: 360px;
  padding: 18px;
  background: var(--dark);
}

.featured-image img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 630;
  object-fit: contain;
  border-radius: 6px;
}

.featured-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(28px, 5vw, 54px);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.post-meta span {
  display: inline-flex;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--slate);
  background: var(--soft);
  font-size: 12px;
  font-weight: 850;
}

.featured-copy h3 {
  max-width: 620px;
  font-size: clamp(30px, 3vw, 42px);
  line-height: 1.04;
}

.featured-copy p {
  color: var(--slate);
  font-size: 19px;
  line-height: 1.5;
  font-weight: 700;
}

.featured-copy > strong {
  width: fit-content;
  margin-top: 10px;
  color: var(--magenta);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.topic-section {
  background: var(--white);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  max-width: 1180px;
  margin-inline: auto;
}

.topic-grid article,
.post-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 24px 70px rgba(15, 23, 42, 0.06);
}

.topic-grid span {
  display: block;
  margin-bottom: 18px;
  color: var(--magenta);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.topic-grid h3,
.post-card h3 {
  font-size: 21px;
  line-height: 1.14;
}

.topic-grid p,
.post-card p {
  margin-bottom: 0;
  color: var(--slate);
  line-height: 1.5;
  font-weight: 700;
}

.roadmap-section {
  background: var(--soft);
}

.article-filter-shell {
  max-width: 1180px;
  margin-inline: auto;
}

.article-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 24px;
}

.filter-input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.filter-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 11px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--slate);
  background: var(--white);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.filter-label:hover,
.filter-label:focus-visible {
  border-color: rgba(236, 15, 140, 0.4);
  color: var(--magenta);
}

#filter-all:checked ~ .filter-label[for="filter-all"],
#filter-founder-bottlenecks:checked ~ .filter-label[for="filter-founder-bottlenecks"],
#filter-business-architecture:checked ~ .filter-label[for="filter-business-architecture"],
#filter-progress-framework:checked ~ .filter-label[for="filter-progress-framework"],
#filter-operating-support:checked ~ .filter-label[for="filter-operating-support"] {
  border-color: var(--magenta);
  color: var(--white);
  background: var(--magenta);
}

.article-filter-shell:has(#filter-founder-bottlenecks:checked) .article-filter-item:not([data-categories~="founder-bottlenecks"]),
.article-filter-shell:has(#filter-business-architecture:checked) .article-filter-item:not([data-categories~="business-architecture"]),
.article-filter-shell:has(#filter-progress-framework:checked) .article-filter-item:not([data-categories~="progress-framework"]),
.article-filter-shell:has(#filter-operating-support:checked) .article-filter-item:not([data-categories~="operating-support"]) {
  display: none;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1180px;
  margin-inline: auto;
}

.post-card {
  display: flex;
  flex-direction: column;
  gap: 18px;
  color: inherit;
  text-decoration: none;
}

.post-thumbnail {
  display: grid;
  place-items: center;
  min-height: 190px;
  padding: 12px;
  border-radius: 8px;
  background: var(--dark);
  overflow: hidden;
}

.post-thumbnail img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 630;
  object-fit: contain;
  border-radius: 6px;
}

.post-card .post-meta {
  margin-bottom: 0;
}

.post-visual {
  display: grid;
  align-content: end;
  min-height: 190px;
  padding: 22px;
  border-radius: 8px;
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(236, 15, 140, 0.28), transparent 48%),
    linear-gradient(35deg, rgba(0, 174, 239, 0.22), transparent 62%),
    var(--dark);
  overflow: hidden;
  position: relative;
}

.post-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.25;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.09) 1px, transparent 1px);
  background-size: 28px 28px;
}

.post-visual span,
.post-visual strong {
  position: relative;
  z-index: 1;
}

.post-visual span {
  margin-bottom: 10px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.post-visual strong {
  max-width: 260px;
  font-size: 28px;
  line-height: 0.98;
  text-transform: uppercase;
}

.post-visual.bottleneck::after,
.post-visual.architecture::after,
.post-visual.progress::after {
  content: "";
  position: absolute;
  right: -42px;
  bottom: -52px;
  width: 168px;
  height: 168px;
  border-radius: 999px;
  background: var(--lime);
  opacity: 0.92;
}

.start-section {
  background: var(--white);
}

.start-card {
  max-width: 980px;
  margin-inline: auto;
  padding: clamp(32px, 6vw, 60px);
  border: 1px solid rgba(236, 15, 140, 0.22);
  border-radius: 8px;
  text-align: center;
  background:
    linear-gradient(135deg, rgba(236, 15, 140, 0.08), transparent 45%),
    linear-gradient(35deg, rgba(0, 174, 239, 0.09), transparent 58%),
    var(--soft);
}

.start-card h2 {
  max-width: 780px;
  margin-right: auto;
  margin-left: auto;
}

.start-card p {
  max-width: 720px;
  margin: 0 auto 30px;
  color: var(--slate);
  font-size: 20px;
  line-height: 1.5;
  font-weight: 700;
}

.site-footer {
  padding: 58px max(20px, calc((100vw - 1180px) / 2)) 28px;
  color: rgba(255, 255, 255, 0.74);
  background: #090f1f;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(260px, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: clamp(28px, 5vw, 64px);
}

.footer-brand img {
  width: 168px;
  max-width: 100%;
  margin-bottom: 18px;
  filter: brightness(0) invert(1);
}

.site-footer h3 {
  margin-bottom: 16px;
  color: var(--white);
  font-size: 13px;
  letter-spacing: 0.14em;
}

.site-footer a {
  display: block;
  margin: 0 0 10px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  font-weight: 750;
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--magenta);
}

.site-footer p {
  max-width: 340px;
  margin: 0 0 18px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 14px;
  line-height: 1.6;
  font-weight: 650;
}

.site-footer .footer-cta {
  display: inline-flex;
  margin-top: 4px;
  padding: 12px 14px;
  border-radius: 8px;
  color: var(--white);
  background: var(--magenta);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-footer .footer-cta:hover,
.site-footer .footer-cta:focus-visible {
  color: var(--white);
  filter: brightness(0.94);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 46px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 12px;
  font-weight: 700;
}

@media (max-width: 1080px) {
  .hero {
    min-height: auto;
  }

  .hero-layout,
  .featured-post {
    grid-template-columns: 1fr;
  }

  .hero-library-card {
    max-width: 720px;
    margin-top: 6px;
  }

  .topic-grid,
  .post-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  body {
    overflow-x: hidden;
  }

  .site-header {
    position: static;
    flex-wrap: wrap;
  }

  .brand img {
    width: 132px;
  }

  nav {
    order: 3;
    width: 100%;
    flex-wrap: wrap;
    justify-content: center;
    overflow: visible;
  }

  .nav-menu {
    display: block;
  }

  .nav-menu-trigger {
    display: inline-flex;
  }

  .nav-dropdown {
    top: calc(100% + 10px);
    right: 0;
    left: auto;
    display: grid;
    min-width: min(300px, calc(100vw - 32px));
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
  }

  .nav-menu:hover .nav-dropdown,
  .nav-menu:focus-within .nav-dropdown,
  .nav-menu.is-open .nav-dropdown {
    transform: translateY(0);
  }

  .header-cta {
    margin-left: auto;
  }

  .hero {
    min-height: auto;
    padding: 74px 18px 52px;
  }

  .hero-copy {
    font-size: 20px;
    line-height: 1.45;
  }

  .hero-actions {
    gap: 12px;
    margin-top: 24px;
  }

  .hero-library-card {
    gap: 12px;
    padding: 14px;
  }

  .library-row {
    padding: 14px;
  }

  h1 {
    overflow-wrap: anywhere;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .button {
    padding-inline: 16px;
    white-space: normal;
    text-align: center;
  }

  .section {
    padding: 72px 18px;
  }

  .featured-image {
    min-height: 260px;
  }

  .topic-grid,
  .post-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
  }
}