:root {
  --seo-paper: #f1eee6;
  --seo-paper-2: #e9e5da;
  --seo-ink: #0e1620;
  --seo-soft: #2a323e;
  --seo-muted: #6b7280;
  --seo-line: rgba(14, 22, 32, 0.14);
  --seo-accent: #1f6674;
  --seo-accent-2: #9fcfc5;
  --seo-good: #287a4f;
  --seo-warn: #9a5a14;
  --seo-radius: 8px;
}

.seo-page {
  background: var(--seo-paper);
  color: var(--seo-ink);
}

.seo-page main {
  overflow: hidden;
}

.seo-hero {
  position: relative;
  padding: clamp(56px, 10vw, 126px) 0 clamp(36px, 7vw, 72px);
  border-bottom: 1px solid var(--seo-line);
}

.seo-hero::before {
  content: "";
  position: absolute;
  inset: -24% -10% auto -10%;
  height: 560px;
  background:
    radial-gradient(circle at 18% 18%, rgba(159, 207, 197, 0.62), transparent 36%),
    radial-gradient(circle at 76% 8%, rgba(154, 176, 223, 0.42), transparent 35%),
    linear-gradient(90deg, rgba(241, 238, 230, 0.55), rgba(241, 238, 230, 0));
  filter: blur(42px);
  pointer-events: none;
}

.seo-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.seo-hero .wrap,
.seo-section .wrap,
.seo-footer-cta .wrap {
  z-index: 2;
}

.seo-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--seo-muted);
}

.seo-kicker::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--seo-muted);
}

.seo-h1 {
  max-width: 920px;
  margin: 0;
  font-size: clamp(42px, 8vw, 98px);
  line-height: 0.96;
  letter-spacing: -0.03em;
  font-weight: 600;
}

.seo-h1 em,
.seo-section h2 em {
  font-family: var(--serif);
  font-weight: 400;
}

.seo-lede {
  max-width: 760px;
  margin: 26px 0 0;
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.55;
  color: var(--seo-soft);
}

.seo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.seo-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid var(--seo-line);
  font-weight: 700;
  font-size: 14px;
}

.seo-btn.primary {
  background: var(--seo-ink);
  border-color: var(--seo-ink);
  color: var(--seo-paper);
}

.seo-btn.secondary {
  background: rgba(255, 255, 255, 0.18);
  color: var(--seo-ink);
}

.seo-btn:hover {
  transform: translateY(-1px);
}

.seo-trust {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 34px;
  max-width: 760px;
}

.seo-trust span {
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  padding: 12px;
  background: rgba(255, 255, 255, 0.18);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--seo-soft);
}

.seo-section {
  padding: clamp(44px, 8vw, 84px) 0;
}

.seo-section.alt {
  background: color-mix(in oklab, var(--seo-paper-2) 62%, var(--seo-paper));
  border-top: 1px solid var(--seo-line);
  border-bottom: 1px solid var(--seo-line);
}

.seo-section h2 {
  max-width: 800px;
  margin: 0 0 18px;
  font-size: clamp(30px, 5vw, 56px);
  line-height: 1.02;
  letter-spacing: -0.025em;
}

.seo-section p {
  max-width: 760px;
  color: var(--seo-soft);
}

.seo-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 26px;
}

.seo-card,
.tool-panel,
.faq-item,
.sign-card {
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  background: rgba(255, 255, 255, 0.2);
  padding: 20px;
}

.seo-card h3,
.tool-panel h3,
.faq-item h3,
.sign-card h3 {
  margin: 0 0 8px;
  font-size: 20px;
  line-height: 1.2;
}

.seo-card p,
.faq-item p,
.sign-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.58;
}

.seo-list {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.seo-list li {
  position: relative;
  padding-left: 28px;
  color: var(--seo-soft);
}

.seo-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--seo-accent);
}

.internal-link-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 26px;
}

.internal-link-grid a {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  padding: 16px;
  background: rgba(255, 255, 255, 0.16);
  font-weight: 700;
}

.internal-link-grid a span {
  color: var(--seo-muted);
}

.tool-panel {
  margin-top: 26px;
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.tool-field label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 700;
}

.tool-field input,
.tool-field select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  padding: 10px 12px;
  background: var(--seo-paper);
  color: var(--seo-ink);
  font: inherit;
}

.tool-result {
  margin-top: 18px;
  border-radius: var(--seo-radius);
  background: var(--seo-ink);
  color: var(--seo-paper);
  padding: 18px;
}

.tool-result strong {
  display: block;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1;
  margin-bottom: 8px;
}

.quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  padding: 12px 14px;
  margin-top: 10px;
  background: var(--seo-paper);
}

.quiz-option.correct {
  border-color: var(--seo-good);
  background: color-mix(in oklab, var(--seo-good) 12%, var(--seo-paper));
}

.quiz-option.wrong {
  border-color: var(--seo-warn);
  background: color-mix(in oklab, var(--seo-warn) 12%, var(--seo-paper));
}

.sign-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 26px;
}

.sign-symbol {
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  margin-bottom: 14px;
  border-radius: 50%;
  background: #f6d33b;
  border: 3px solid #c0262d;
  font-weight: 900;
}

.sign-symbol.blue {
  background: #1f63b6;
  color: #fff;
  border-color: #fff;
  box-shadow: inset 0 0 0 3px #1f63b6;
}

.sign-symbol.red {
  background: #fff;
  color: #111;
  border-color: #c0262d;
}

.faq-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 800;
}

.faq-item p {
  margin-top: 10px;
}

.seo-footer-cta {
  padding: clamp(48px, 8vw, 86px) 0;
  background: var(--seo-ink);
  color: var(--seo-paper);
}

.seo-footer-cta p {
  max-width: 720px;
  color: rgba(241, 238, 230, 0.78);
}

@media (min-width: 720px) {
  .seo-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.55fr);
    align-items: end;
  }

  .seo-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .sign-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 719px) {
  .seo-trust {
    grid-template-columns: 1fr;
  }

  .sign-grid {
    grid-template-columns: 1fr;
  }
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 14px;
  font-size: 13px;
  color: var(--seo-muted);
}

.breadcrumb a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.quick-answer,
.definition-block {
  max-width: 780px;
  margin-top: 22px;
  border-left: 4px solid var(--seo-accent);
  border-radius: var(--seo-radius);
  background: color-mix(in oklab, var(--seo-accent-2) 22%, var(--seo-paper));
  padding: 16px 18px;
  color: var(--seo-ink);
  font-size: 16px;
  line-height: 1.58;
}

.answer-block {
  font-size: 18px;
  line-height: 1.62;
}

.content-with-sidebar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.topic-sidebar {
  align-self: start;
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  padding: 18px;
  background: rgba(255, 255, 255, 0.16);
}

.topic-sidebar h3 {
  margin: 0 0 12px;
}

.related-grid {
  display: grid;
  gap: 10px;
}

.related-grid a {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  padding: 13px 14px;
  background: rgba(255, 255, 255, 0.18);
}

.related-grid a span {
  color: var(--seo-muted);
  font-size: 13px;
}

.comparison-table {
  width: 100%;
  overflow-x: auto;
  margin-top: 24px;
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
}

.comparison-table table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}

.comparison-table th,
.comparison-table td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--seo-line);
  text-align: left;
}

.comparison-table th {
  background: color-mix(in oklab, var(--seo-paper-2) 70%, var(--seo-paper));
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.stats-grid div,
.review-card,
.before-after > div {
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  padding: 18px;
  background: rgba(255, 255, 255, 0.16);
}

.stats-grid strong {
  display: block;
  font-size: clamp(30px, 6vw, 54px);
  line-height: 1;
}

.stats-grid span {
  color: var(--seo-soft);
}

.before-after {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 14px;
}

.review-card {
  margin-top: 14px;
}

.learning-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 22px;
}

.learning-flow a {
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  padding: 14px;
  background: var(--seo-paper);
  font-weight: 800;
}

.floating-cta {
  position: fixed;
  right: 16px;
  bottom: 88px;
  z-index: 70;
  display: none;
  border-radius: 999px;
  padding: 12px 16px;
  background: var(--seo-ink);
  color: var(--seo-paper);
  font-weight: 800;
  box-shadow: 0 10px 28px rgba(14, 22, 32, 0.22);
}

.install-bar {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: 12px;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border: 1px solid rgba(241, 238, 230, 0.22);
  border-radius: 12px;
  padding: 10px 10px 10px 14px;
  background: rgba(14, 22, 32, 0.96);
  color: var(--seo-paper);
  box-shadow: 0 16px 44px rgba(14, 22, 32, 0.28);
}

.install-bar a {
  flex: 0 0 auto;
  border-radius: 999px;
  padding: 9px 12px;
  background: var(--seo-paper);
  color: var(--seo-ink);
  font-weight: 800;
  font-size: 13px;
}

.install-bar button {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: var(--seo-paper);
}

.install-bar.is-hidden {
  display: none;
}

.progress-shell {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--seo-line) 80%, transparent);
  overflow: hidden;
  margin: 18px 0 12px;
}

.progress-shell span {
  display: block;
  width: 0%;
  height: 100%;
  background: var(--seo-accent);
  transition: width 0.25s ease;
}

.quiz-feedback {
  min-height: 40px;
  margin-top: 12px;
  font-weight: 700;
}

.quiz-feedback.good {
  color: var(--seo-good);
}

.quiz-feedback.bad {
  color: var(--seo-warn);
}

.seo-phase3 .micro-label {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--seo-muted);
}

.snippet-grid,
.two-column-soft,
.eeat-grid {
  display: grid;
  gap: 18px;
}

.short-answer-card,
.snippet-side,
.safety-note,
.author-card,
.source-card,
.entity-grid article {
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  background: rgba(255, 255, 255, 0.18);
  padding: clamp(18px, 3vw, 26px);
}

.short-answer-card h2,
.human-scenario h2,
.methodology-section h2,
.entity-section h2,
.phase3-mistakes h2,
.eeat-section h2 {
  margin-top: 0;
}

.quick-bullets {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.quick-bullets span {
  border: 1px solid var(--seo-line);
  border-radius: 999px;
  padding: 7px 10px;
  background: var(--seo-paper);
  font-size: 13px;
  font-weight: 800;
}

.mini-table {
  overflow-x: auto;
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  background: var(--seo-paper);
}

.mini-table table {
  width: 100%;
  border-collapse: collapse;
}

.mini-table th,
.mini-table td {
  padding: 11px 12px;
  border-bottom: 1px solid var(--seo-line);
  text-align: left;
  vertical-align: top;
}

.mini-table tr:last-child th,
.mini-table tr:last-child td {
  border-bottom: 0;
}

.context-links,
.snippet-side p,
.method-copy,
.faq-note {
  color: var(--seo-soft);
}

.context-links a,
.snippet-side a,
.source-card a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.mistake-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.mistake-list li {
  border-left: 3px solid var(--seo-warn);
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 0 var(--seo-radius) var(--seo-radius) 0;
}

.method-steps {
  display: grid;
  gap: 12px;
  margin: 18px 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.method-steps li {
  counter-increment: steps;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  border: 1px solid var(--seo-line);
  border-radius: var(--seo-radius);
  padding: 12px;
  background: rgba(255, 255, 255, 0.18);
}

.method-steps li::before {
  content: counter(steps);
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--seo-ink);
  color: var(--seo-paper);
  font-weight: 800;
}

.entity-grid {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.entity-grid article h3 {
  margin-top: 0;
}

.entity-grid article p {
  margin-bottom: 0;
}

.author-card {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.author-card img {
  aspect-ratio: 1;
  border-radius: 14px;
  width: 64px;
  height: 64px;
}

.source-card ul {
  margin: 12px 0;
  padding-left: 18px;
}

.faq-note {
  max-width: 760px;
  margin: -4px 0 18px;
}

.faq-variant-1 .faq-item:nth-child(even),
.faq-variant-3 .faq-item:nth-child(odd) {
  background: rgba(255, 255, 255, 0.2);
}

.layout-v1 .seo-section:nth-of-type(3n),
.layout-v4 .seo-section:nth-of-type(4n) {
  border-top-style: dashed;
}

.layout-v2 .short-answer-card,
.layout-v5 .source-card {
  background: color-mix(in oklab, var(--seo-accent-2) 24%, var(--seo-paper));
}

@media (min-width: 720px) {
  .content-with-sidebar {
    grid-template-columns: minmax(0, 1fr) 320px;
  }

  .before-after,
  .learning-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .snippet-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  }

  .two-column-soft,
  .eeat-grid {
    grid-template-columns: minmax(0, 1fr) 340px;
  }

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

  .floating-cta {
    display: inline-flex;
  }
}

@media (max-width: 719px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  body.seo-page {
    padding-bottom: 76px;
  }
}