:root {
  color-scheme: light;
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-soft: #f7f8fb;
  --ink: #070707;
  --muted: #5f6673;
  --faint: #9096a3;
  --line: #e4e7ec;
  --blue: #0647ff;
  --blue-ink: #00258f;
  --lime: #c7f000;
  --lime-soft: #edff9c;
  --shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
  --radius: 8px;
  --max: 1320px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

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

a:hover {
  color: var(--blue);
}

:focus-visible {
  outline: 3px solid rgba(6, 71, 255, 0.35);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 20;
  padding: 0.75rem 1rem;
  background: var(--blue);
  color: white;
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 1rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.topbar {
  width: min(var(--max), calc(100% - 48px));
  min-height: 58px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  font-size: clamp(1.45rem, 1vw + 1.1rem, 2rem);
  font-weight: 900;
  letter-spacing: 0;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2vw, 42px);
  font-size: 0.92rem;
  font-weight: 700;
}

.nav a {
  min-height: 58px;
  display: inline-flex;
  align-items: center;
  border-bottom: 3px solid transparent;
}

.nav a[aria-current="page"] {
  color: var(--blue);
  border-color: var(--blue);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-button {
  width: 38px;
  height: 38px;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  display: grid;
  place-items: center;
  cursor: pointer;
}

.icon-button:hover {
  background: var(--surface-soft);
  color: var(--blue);
}

.container {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

.home-grid {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 286px;
  gap: 30px;
  padding: 30px 0 0;
}

.left-rail {
  border-right: 1px solid var(--line);
  padding-right: 24px;
}

.right-rail {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.rail-title {
  margin: 0 0 18px;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 900;
}

.topic-list,
.plain-list,
.tag-list,
.popular-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.topic-list {
  display: grid;
  gap: 16px;
}

.topic-list a {
  display: grid;
  grid-template-columns: 24px 1fr auto;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 0.93rem;
  font-weight: 700;
}

.topic-list svg {
  width: 18px;
  height: 18px;
  color: var(--muted);
}

.topic-list span:last-child {
  color: var(--faint);
  font-weight: 600;
}

.mini-promo {
  margin-top: 48px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.promo-mark {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  background: var(--lime);
  display: grid;
  place-items: center;
  color: var(--blue);
  margin-bottom: 18px;
}

.mini-promo h2,
.panel h2 {
  margin: 0 0 8px;
  font-size: 1rem;
  line-height: 1.25;
}

.mini-promo p,
.panel p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.main-stack {
  min-width: 0;
}

.page-kicker {
  color: var(--muted);
  max-width: 560px;
  margin: 0;
  font-size: clamp(1rem, 0.35vw + 0.92rem, 1.16rem);
}

.hero-title {
  margin: 14px 0 12px;
  font-size: clamp(3.5rem, 7.5vw, 5.4rem);
  line-height: 0.92;
  letter-spacing: 0;
  font-weight: 950;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin: 26px 0 12px;
}

.section-head h2,
.article-section h2 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.2;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.text-link {
  color: var(--blue);
  font-size: 0.9rem;
  font-weight: 800;
}

.feature-card {
  display: grid;
  grid-template-columns: minmax(260px, 1.08fr) minmax(240px, 1fr);
  gap: 24px;
  align-items: center;
  margin-top: 20px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.feature-card img,
.post-card img,
.popular-card img,
.article-hero img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface-soft);
}

.feature-card img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.feature-copy {
  padding: 8px 10px 8px 0;
}

.label {
  color: var(--blue);
  font-size: 0.72rem;
  font-weight: 950;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.feature-copy h2 {
  margin: 12px 0 12px;
  font-size: clamp(1.8rem, 2vw, 2.45rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.feature-copy p,
.post-card p {
  color: var(--muted);
  margin: 0 0 16px;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.84rem;
}

.meta a,
.tag {
  color: var(--blue);
  font-weight: 800;
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
}

.post-card {
  min-height: 132px;
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 16px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.post-card:hover,
.feature-card:hover,
.panel:hover {
  box-shadow: var(--shadow);
}

.post-card img {
  aspect-ratio: 1 / 0.78;
  object-fit: cover;
}

.post-card h3,
.popular-card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  line-height: 1.23;
}

.post-card p {
  font-size: 0.88rem;
}

.panel {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.newsletter-form {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.newsletter-form input,
.search-box input {
  width: 100%;
  min-height: 42px;
  border: 1px solid #d5d9e1;
  border-radius: 4px;
  padding: 0 12px;
  font: inherit;
  background: white;
}

.button {
  min-height: 42px;
  border: 0;
  border-radius: 4px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--blue);
  color: white;
  font-weight: 900;
  cursor: pointer;
}

.button.lime {
  background: var(--lime);
  color: #0b0b0b;
}

.button:hover {
  filter: brightness(0.96);
  color: white;
}

.popular-list {
  display: grid;
  gap: 12px;
}

.popular-card {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 12px;
  align-items: center;
}

.popular-card img {
  aspect-ratio: 1 / 0.78;
  object-fit: cover;
}

.popular-card h3 {
  font-size: 0.85rem;
}

.popular-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-list a {
  padding: 4px 8px;
  border: 1px solid #d6dbe4;
  border-radius: 4px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  background: #fbfbfc;
}

.footer-grid {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.25fr repeat(3, 1fr);
  gap: 42px;
  padding: 30px 0;
}

.footer-grid h2,
.footer-grid h3 {
  margin: 0 0 10px;
}

.footer-grid h2 {
  font-size: 1.45rem;
}

.footer-grid h3 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-grid p,
.footer-grid a {
  color: var(--muted);
  font-size: 0.9rem;
}

.plain-list {
  display: grid;
  gap: 6px;
}

.subfooter {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
}

.article-shell {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 740px) 280px;
  gap: 56px;
  padding-top: 42px;
}

.article-header h1,
.page-header h1 {
  margin: 12px 0 16px;
  font-size: clamp(2.45rem, 6vw, 4.8rem);
  line-height: 0.96;
  letter-spacing: 0;
}

.article-dek {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: clamp(1.05rem, 1vw + 0.9rem, 1.35rem);
}

.article-hero {
  margin: 28px 0;
}

.article-hero img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.prose {
  font-size: 1.08rem;
}

.prose h2 {
  margin: 36px 0 12px;
  font-size: 1.72rem;
  line-height: 1.15;
}

.prose h3 {
  margin: 28px 0 10px;
  font-size: 1.2rem;
}

.prose p,
.prose li {
  color: #242833;
}

.prose p {
  margin: 0 0 18px;
}

.prose ul,
.prose ol {
  padding-left: 1.35rem;
}

.prose li + li {
  margin-top: 8px;
}

.callout {
  margin: 28px 0;
  padding: 18px;
  border: 1px solid #dbe6ff;
  border-left: 5px solid var(--blue);
  border-radius: var(--radius);
  background: #f4f7ff;
}

.toc {
  position: sticky;
  top: 88px;
}

.toc h2 {
  margin: 0 0 10px;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.toc a {
  display: block;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
}

.page-shell {
  width: min(980px, calc(100% - 48px));
  margin: 0 auto;
  padding: 44px 0 8px;
}

.tool-shell {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  padding: 44px 0 8px;
}

.page-header {
  margin-bottom: 28px;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.template-grid {
  display: grid;
  gap: 18px;
}

.template-card {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 22px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.template-card:hover {
  box-shadow: var(--shadow);
}

.template-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-soft);
}

.template-card h2 {
  margin: 0 0 8px;
  font-size: 1.55rem;
  line-height: 1.12;
}

.template-card p {
  margin: 0 0 16px;
  color: var(--muted);
}

.traffic-cta {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 18px;
  align-items: center;
  margin: 24px 0 0;
  padding: 18px;
  border: 1px solid #dbe6ff;
  border-radius: var(--radius);
  background: #f4f7ff;
}

.traffic-cta h2 {
  margin: 0 0 4px;
  font-size: 1.1rem;
}

.traffic-cta p {
  margin: 0;
  color: var(--muted);
}

.search-box {
  display: flex;
  gap: 10px;
  margin: 22px 0 26px;
}

.tool-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 22px;
  align-items: start;
}

.tool-panel {
  display: grid;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.tool-panel label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 900;
}

.tool-panel input,
.tool-panel select,
.tool-panel textarea {
  width: 100%;
  border: 1px solid #d5d9e1;
  border-radius: 4px;
  padding: 10px 12px;
  color: var(--ink);
  background: white;
  font: inherit;
}

.tool-panel textarea {
  resize: vertical;
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tool-actions.tight {
  justify-content: flex-end;
}

.section-head.compact {
  margin: 0;
  align-items: center;
}

.button.secondary {
  background: var(--ink);
}

.result-panel textarea {
  min-height: 440px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.88rem;
  line-height: 1.55;
}

.tool-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.tool-content {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  margin-top: 34px;
}

.tool-content h2 {
  margin: 0 0 10px;
  font-size: 1.1rem;
  line-height: 1.2;
}

.tool-content p {
  margin: 0;
  color: #242833;
}

.mini-list {
  margin: 0;
  padding-left: 1.15rem;
  color: #242833;
}

.mini-list li + li {
  margin-top: 7px;
}

.mini-list a {
  color: var(--blue);
  font-weight: 800;
}

.search-results {
  display: grid;
  gap: 14px;
}

.result-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.result-card h2 {
  margin: 0 0 6px;
  font-size: 1.25rem;
}

.result-card p {
  margin: 0 0 10px;
  color: var(--muted);
}

.analytics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.analytics-controls {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  margin-bottom: 12px;
}

.metric-card {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.metric-card span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.metric-card strong {
  display: block;
  margin-top: 6px;
  font-size: 2.2rem;
  line-height: 1;
}

.metric-list {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.metric-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.metric-list span {
  overflow-wrap: anywhere;
}

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

.analytics-wide {
  grid-column: 1 / -1;
}

.analytics-wide pre {
  overflow: auto;
  max-height: 440px;
  margin: 12px 0 0;
  padding: 14px;
  border-radius: var(--radius);
  background: #090909;
  color: #f6f7fb;
  font-size: 0.78rem;
}

@media (max-width: 1120px) {
  .home-grid {
    grid-template-columns: minmax(0, 1fr) 286px;
  }

  .left-rail {
    display: none;
  }
}

@media (max-width: 860px) {
  .topbar {
    width: min(100% - 28px, var(--max));
    min-height: auto;
    padding: 12px 0;
    align-items: flex-start;
  }

  .nav {
    display: none;
  }

  .container,
  .footer-grid,
  .subfooter,
  .article-shell,
  .page-shell {
    width: min(100% - 28px, var(--max));
  }

  .home-grid,
  .article-shell {
    grid-template-columns: 1fr;
  }

  .right-rail,
  .toc {
    position: static;
  }

  .feature-card,
  .post-grid,
  .topic-grid,
  .template-card,
    .traffic-cta,
    .tool-grid,
    .tool-content,
    .field-grid,
    .analytics-controls,
    .analytics-grid,
    .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature-copy {
    padding: 0;
  }

  .post-card {
    grid-template-columns: 104px 1fr;
  }

  .hero-title {
    font-size: clamp(3rem, 17vw, 4.4rem);
  }

  .search-box {
    display: grid;
  }

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

@media (max-width: 520px) {
  .post-card,
  .popular-card {
    grid-template-columns: 1fr;
  }

  .post-card img,
  .popular-card img {
    max-height: 170px;
  }

  .article-header h1,
  .page-header h1 {
    font-size: clamp(2.15rem, 15vw, 3.25rem);
  }
}