:root {
  --background: #fcf8fa;
  --surface: #ffffff;
  --surface-low: #f6f3f5;
  --surface-mid: #eeedf2;
  --ink: #1b1b1d;
  --ink-soft: #484950;
  --outline: #c8c7cf;
  --outline-soft: rgba(200, 199, 207, 0.62);
  --navy: #131b2e;
  --violet: #4648d4;
  --violet-bright: #6063ee;
  --green: #10b981;
  --yellow: #f59e0b;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--background);
  font-family: Inter, "Avenir Next", "Segoe UI", system-ui, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: var(--violet);
}

p,
li,
dd {
  color: var(--ink-soft);
  font-size: 1.04rem;
  line-height: 1.75;
}

.container {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--outline-soft);
  background: rgba(252, 248, 250, 0.94);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 14px;
  color: #ffffff;
  background: var(--violet-bright);
  font-size: 1.2rem;
  letter-spacing: 0;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.brand-copy strong {
  font-size: 1.05rem;
}

.brand-copy span {
  color: var(--ink-soft);
  font-size: 0.8rem;
  font-weight: 650;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--ink-soft);
  font-size: 0.94rem;
  font-weight: 750;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0.85rem 1.18rem;
  border: 1px solid #000000;
  border-radius: 999px;
  color: #ffffff;
  background: #000000;
  font-weight: 850;
  text-align: center;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.button:hover,
.button:focus-visible {
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(19, 27, 46, 0.16);
}

.button.secondary {
  color: var(--ink);
  background: var(--surface);
  border-color: var(--outline);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  color: var(--ink);
}

.hero {
  padding: clamp(3.8rem, 8vw, 6.2rem) 0 clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--outline-soft);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(300px, 0.72fr);
  gap: clamp(2rem, 6vw, 4rem);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--violet);
  font-size: 0.84rem;
  font-weight: 850;
  letter-spacing: 0;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 0.58rem;
  height: 0.58rem;
  border-radius: 50%;
  background: currentColor;
}

h1,
h2,
h3 {
  color: var(--ink);
}

h1 {
  margin: 1rem 0 1rem;
  max-width: 11ch;
  font-size: 5.6rem;
  line-height: 0.92;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 0.85rem;
  font-size: 3rem;
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  line-height: 1.18;
  letter-spacing: 0;
}

.lede {
  max-width: 68ch;
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.18rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.6rem;
}

.blog-index-hero h1 {
  max-width: 12ch;
}

.article-title {
  max-width: 14ch;
  font-size: clamp(3.3rem, 7.2vw, 5.6rem);
}

.answer-box,
.fact-panel,
.cta-panel {
  border: 2px solid #000000;
  border-radius: 24px;
  background: var(--surface);
  box-shadow: 0 22px 56px rgba(19, 27, 46, 0.1);
}

.answer-box {
  padding: clamp(1.25rem, 3vw, 1.7rem);
}

.answer-box h2 {
  margin-bottom: 0.7rem;
  font-size: 2rem;
}

.answer-box p {
  margin: 0;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
  padding: clamp(3.2rem, 7vw, 5rem) 0;
}

.post-list-section {
  padding: clamp(3.2rem, 7vw, 5rem) 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 1.6rem;
}

.section-heading p {
  margin: 0;
}

.post-list {
  display: grid;
  gap: 1rem;
}

.post-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.2rem;
  align-items: end;
  padding: clamp(1.2rem, 3vw, 1.7rem);
  border: 1px solid var(--outline);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.68);
}

.post-card h3 {
  margin-bottom: 0.45rem;
  font-size: 1.55rem;
}

.post-card p {
  margin: 0;
}

.post-meta {
  margin-bottom: 0.45rem;
  color: var(--violet);
  font-size: 0.9rem;
  font-weight: 850;
}

.post-link {
  color: var(--ink);
  font-weight: 850;
  text-decoration: underline;
  text-underline-offset: 0.22em;
}

.article-content {
  max-width: 760px;
}

.article-content section + section {
  margin-top: clamp(3rem, 6vw, 4.6rem);
}

.article-content p {
  margin: 0 0 1rem;
}

.article-content ul,
.article-content ol {
  display: grid;
  gap: 0.72rem;
  margin: 1rem 0 0;
  padding-left: 1.25rem;
}

.toc {
  position: sticky;
  top: 100px;
  padding: 1rem;
  border: 1px solid var(--outline);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
}

.toc strong {
  display: block;
  margin-bottom: 0.75rem;
}

.toc a {
  display: block;
  padding: 0.45rem 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
  font-weight: 750;
}

.summary-list {
  display: grid;
  gap: 0.85rem;
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
}

.summary-list li {
  padding: 0.95rem 1rem;
  border: 1px solid var(--outline);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.66);
}

.loop-list {
  counter-reset: loop;
  display: grid;
  gap: 0.85rem;
  margin: 1.3rem 0 0;
  padding: 0;
  list-style: none;
}

.loop-list li {
  position: relative;
  min-height: 76px;
  padding: 1rem 1rem 1rem 4.6rem;
  border: 1px solid var(--outline);
  border-radius: 18px;
  background: var(--surface);
}

.loop-list li::before {
  counter-increment: loop;
  content: counter(loop);
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: grid;
  place-items: center;
  width: 2.55rem;
  height: 2.55rem;
  border-radius: 13px;
  color: #ffffff;
  background: var(--violet-bright);
  font-weight: 850;
}

.loop-list strong {
  display: block;
  margin-bottom: 0.18rem;
  color: var(--ink);
}

.comparison {
  overflow: hidden;
  border: 1px solid var(--outline);
  border-radius: 22px;
  background: var(--surface);
}

.comparison-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.comparison-row + .comparison-row {
  border-top: 1px solid var(--outline-soft);
}

.comparison-cell {
  padding: 1rem;
}

.comparison-cell + .comparison-cell {
  border-left: 1px solid var(--outline-soft);
}

.comparison-head .comparison-cell {
  color: var(--ink);
  background: var(--surface-mid);
  font-weight: 850;
}

.fact-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border-width: 1px;
  box-shadow: none;
}

.fact-panel div {
  padding: 1.1rem;
  background: var(--surface);
}

.fact-panel dt {
  color: var(--ink);
  font-size: 0.84rem;
  font-weight: 850;
  letter-spacing: 0;
  text-transform: uppercase;
}

.fact-panel dd {
  margin: 0.45rem 0 0;
}

.faq {
  display: grid;
  gap: 0.85rem;
}

.faq details {
  padding: 1.05rem 1rem;
  border: 1px solid var(--outline);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.66);
}

.faq summary {
  cursor: pointer;
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 850;
}

.faq p {
  margin: 0.75rem 0 0;
}

.cta-section {
  padding: 0 0 clamp(3.5rem, 7vw, 5.5rem);
}

.cta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1.3rem;
  align-items: end;
  padding: clamp(1.5rem, 4vw, 2.4rem);
  color: #ffffff;
  background: var(--navy);
}

.cta-panel h2 {
  max-width: 13ch;
  color: #ffffff;
}

.cta-panel p {
  max-width: 58ch;
  color: rgba(255, 255, 255, 0.78);
}

.cta-panel .button {
  color: var(--ink);
  background: #ffffff;
}

.site-footer {
  padding: 1.4rem 0 2.3rem;
  border-top: 1px solid var(--outline-soft);
  color: var(--ink-soft);
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.92rem;
  font-weight: 650;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

@media (max-width: 900px) {
  .hero-grid,
  .article-layout,
  .post-card,
  .cta-panel {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }

  h1 {
    font-size: 4.4rem;
  }

  h2 {
    font-size: 2.45rem;
  }
}

@media (max-width: 680px) {
  .nav {
    min-height: 70px;
  }

  .brand-copy span,
  .nav-links a:not(.button) {
    display: none;
  }

  .button {
    min-height: 46px;
    padding: 0.75rem 1rem;
  }

  h1 {
    font-size: 3.35rem;
  }

  h2 {
    font-size: 2.05rem;
  }

  .answer-box h2 {
    font-size: 1.65rem;
  }

  .lede {
    font-size: 1.08rem;
  }

  .comparison-row,
  .fact-panel {
    grid-template-columns: 1fr;
  }

  .comparison-cell + .comparison-cell {
    border-top: 1px solid var(--outline-soft);
    border-left: 0;
  }

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