@font-face {
  font-family: "Space Grotesk";
  src: url("/fonts/space-grotesk.woff2") format("woff2");
  font-display: swap;
}
@font-face {
  font-family: "Instrument Serif";
  src: url("/fonts/instrument-serif-regular.woff2") format("woff2");
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/fonts/ibm-plex-mono-400.woff2") format("woff2");
  font-display: swap;
}
:root {
  --paper: #f2efe6;
  --ink: #171714;
  --orange: #ff5a36;
  --blue: #315cff;
  --muted: #66635b;
  --line: #cbc7bc;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
}
.seo-nav {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 5vw, 76px);
  border-bottom: 1px solid var(--line);
}
.brand {
  color: inherit;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  text-decoration: none;
}
.brand span {
  font-weight: 400;
}
.brand i {
  color: var(--orange);
  font-style: normal;
}
.seo-nav nav {
  display: flex;
  gap: 24px;
  align-items: center;
}
.seo-nav nav a {
  color: inherit;
  font-size: 0.72rem;
  text-decoration: none;
}
.seo-nav .cta {
  background: var(--ink);
  color: white;
  padding: 13px 16px;
}
.seo-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: 8vw;
  padding: clamp(70px, 9vw, 140px) clamp(22px, 8vw, 130px);
  border-bottom: 1px solid var(--line);
}
.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--orange);
}
h1 {
  max-width: 950px;
  margin: 24px 0 32px;
  font-size: clamp(4rem, 7.5vw, 8.5rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 0.9;
}
h1 em {
  font-family: "Instrument Serif", serif;
  font-weight: 400;
  letter-spacing: -0.01em;
}
.seo-lead {
  max-width: 720px;
  font-size: clamp(1.05rem, 1.5vw, 1.35rem);
  line-height: 1.65;
  color: var(--muted);
}
.hero-card {
  align-self: end;
  border: 2px solid var(--ink);
  box-shadow: 10px 10px 0 var(--orange);
  padding: 28px;
}
.hero-card b {
  display: block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.6rem;
  letter-spacing: 0.1em;
}
.hero-card ul {
  margin: 24px 0;
  padding-left: 20px;
}
.hero-card li {
  margin: 12px 0;
  line-height: 1.5;
}
.button {
  display: inline-flex;
  background: var(--orange);
  color: white;
  padding: 16px 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-decoration: none;
}
.seo-body {
  display: grid;
  grid-template-columns: minmax(180px, 260px) minmax(0, 760px);
  gap: clamp(45px, 8vw, 130px);
  max-width: 1280px;
  margin: auto;
  padding: 90px clamp(22px, 8vw, 130px) 120px;
}
.seo-side {
  align-self: start;
  position: sticky;
  top: 30px;
}
.seo-side b {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.58rem;
  letter-spacing: 0.1em;
}
.seo-side nav {
  display: flex;
  flex-direction: column;
  margin-top: 25px;
  border-top: 1px solid var(--line);
}
.seo-side a {
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.75rem;
  text-decoration: none;
}
.seo-copy section {
  padding: 0 0 45px;
  margin-bottom: 45px;
  border-bottom: 1px solid var(--line);
}
.seo-copy h2 {
  margin: 0 0 20px;
  font-family: "Instrument Serif", serif;
  font-size: clamp(2.4rem, 4vw, 4rem);
  font-weight: 400;
  letter-spacing: -0.008em;
  line-height: 1;
}
.seo-copy h3 {
  margin: 28px 0 12px;
  font-size: 1.15rem;
}
.seo-copy p,
.seo-copy li {
  font-size: 1rem;
  line-height: 1.75;
  color: #403e39;
}
.seo-copy li + li {
  margin-top: 10px;
}
.example-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--ink);
  border: 1px solid var(--ink);
  margin-top: 28px;
}
.example-grid article {
  background: var(--paper);
  padding: 22px;
}
.example-grid span {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.52rem;
  color: var(--orange);
}
.example-grid h3 {
  margin: 13px 0 8px;
}
.example-grid p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.55;
}
.faq details {
  border-top: 1px solid var(--line);
  padding: 20px 0;
}
.faq details:last-child {
  border-bottom: 1px solid var(--line);
}
.faq summary {
  cursor: pointer;
  font-weight: 650;
}
.faq p {
  margin-bottom: 0;
}
.seo-end {
  background: var(--blue);
  color: white;
  padding: 70px clamp(22px, 8vw, 130px);
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 35px;
}
.seo-end h2 {
  max-width: 800px;
  margin: 0;
  font-size: clamp(3rem, 6vw, 6rem);
  line-height: 0.92;
  letter-spacing: -0.04em;
}
.seo-end p {
  max-width: 420px;
  line-height: 1.6;
}
.seo-footer {
  display: flex;
  justify-content: space-between;
  gap: 25px;
  padding: 32px clamp(22px, 5vw, 76px);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.58rem;
}
.seo-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.seo-footer a {
  color: inherit;
}
.thai-seo {
  font-family: Tahoma, "Noto Sans Thai", sans-serif;
  line-height: 1.5;
}
.thai-seo h1,
.thai-seo h2,
.thai-seo h3,
.thai-seo h1 em,
.thai-seo .eyebrow,
.thai-seo .hero-card b,
.thai-seo .seo-side b,
.thai-seo .seo-footer,
.thai-seo .example-grid span {
  font-family: Tahoma, "Noto Sans Thai", sans-serif;
}
.thai-seo h1 {
  font-size: clamp(3.1rem, 6.2vw, 6.6rem);
  line-height: 1.2;
  letter-spacing: -0.025em;
}
.thai-seo h1 em {
  color: var(--blue);
  font-style: normal;
  letter-spacing: inherit;
}
.thai-seo .seo-copy h2 {
  font-size: clamp(2rem, 3.3vw, 3.3rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
}
.thai-seo .seo-end h2 {
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
}
.thai-seo .eyebrow,
.thai-seo .hero-card b,
.thai-seo .seo-side b,
.thai-seo .example-grid span {
  font-size: 0.75rem;
  letter-spacing: 0;
}
.thai-seo .seo-nav nav a,
.thai-seo .seo-side a,
.thai-seo .button {
  font-size: 0.9rem;
}
.thai-seo .seo-copy p,
.thai-seo .seo-copy li,
.thai-seo .hero-card li {
  line-height: 1.8;
}
.thai-seo .seo-copy a {
  color: var(--blue);
  text-underline-offset: 0.2em;
}
.thai-seo .seo-note {
  border-left: 3px solid var(--orange);
  padding: 12px 16px;
  background: #e8e3d8;
  font-size: 0.9rem;
}
.thai-seo .seo-footer {
  font-size: 0.75rem;
}
.thai-seo .seo-language-note {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.76rem;
}
@media (max-width: 900px) {
  .seo-body {
    display: block;
    padding-top: 65px;
  }
  .seo-side {
    position: static;
    margin-bottom: 60px;
  }
}
@media (max-width: 760px) {
  .seo-nav {
    height: 68px;
  }
  .seo-nav nav a:not(.cta) {
    display: none;
  }
  .seo-hero {
    display: block;
    padding-top: 70px;
  }
  .hero-card {
    margin-top: 55px;
  }
  .seo-body {
    display: block;
    padding-top: 65px;
  }
  .seo-side {
    position: static;
    margin-bottom: 60px;
  }
  .example-grid {
    grid-template-columns: 1fr;
  }
  .seo-end {
    display: block;
  }
  .seo-end p {
    margin: 28px 0;
  }
  .seo-footer {
    flex-direction: column;
  }
  h1 {
    font-size: clamp(3.7rem, 17vw, 5.6rem);
    letter-spacing: -0.032em;
    line-height: 0.93;
  }
  .thai-seo h1 {
    font-size: clamp(2.7rem, 11vw, 4.7rem);
    line-height: 1.2;
  }
  .thai-seo .seo-hero {
    padding-top: 54px;
  }
  .thai-seo .hero-card {
    margin-top: 40px;
  }
}
@media (max-width: 360px) {
  h1 {
    font-size: clamp(3.35rem, 16vw, 5rem);
  }
  .thai-seo h1 {
    font-size: 2.45rem;
  }
}