body {
  background: #f7f8f9;
  margin: 0;
}

#site-header,
#game-guide,
#site-footer,
.static-page {
  box-sizing: border-box;
  color: #16202a;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
}

#site-header *,
#game-guide *,
#site-footer *,
.static-page * {
  box-sizing: border-box;
}

#site-header {
  align-items: center;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid #d9e0e7;
  box-shadow: 0 10px 30px rgba(22, 32, 42, 0.06);
  display: flex;
  gap: 28px;
  justify-content: space-between;
  min-height: 72px;
  padding: 14px max(24px, calc((100vw - 1040px) / 2));
  position: relative;
  z-index: 2;
}

.site-brand {
  align-items: center;
  display: flex;
  flex-direction: row;
  gap: 12px;
  min-width: 220px;
}

.site-brand::before {
  align-items: center;
  background: #ffffff;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  color: #111827;
  content: '1K';
  display: flex;
  flex: 0 0 auto;
  font-size: 22px;
  font-weight: 800;
  height: 38px;
  justify-content: center;
  letter-spacing: 0;
  line-height: 1;
  width: 38px;
}

.site-brand-name,
.site-brand-tagline {
  display: block;
}

.site-brand-name {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1;
}

.site-brand-tagline {
  color: #68737d;
  font-size: 14px;
  line-height: 1.35;
  margin-top: 4px;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.site-nav a {
  align-items: center;
  border: 1px solid transparent;
  border-radius: 999px;
  color: #25313c;
  display: inline-flex;
  font-size: 14px;
  font-weight: 650;
  min-height: 38px;
  padding: 0 14px;
  text-decoration: none;
  transition:
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease;
}

.site-nav a:hover {
  background: #f3f4f6;
  border-color: #c7cdd4;
  color: #111827;
}

.site-mobile-menu {
  display: none;
}

#game-guide {
  background: #f7f8f9;
  border-top: 1px solid #d8dee4;
  padding: 48px max(20px, calc((100vw - 960px) / 2)) 24px;
}

.guide-intro {
  margin: 0 auto 32px;
  max-width: 760px;
}

.guide-eyebrow {
  color: #52606d;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  margin: 0 0 8px;
  text-transform: uppercase;
}

.guide-intro h1 {
  font-size: 34px;
  line-height: 1.15;
  margin: 0 0 16px;
}

.guide-intro p,
.guide-section p,
.static-page p,
.static-page li,
#site-footer {
  font-size: 16px;
  line-height: 1.6;
}

.guide-sections {
  display: block;
  margin: 0 auto;
  max-width: 760px;
}

.guide-section {
  margin-top: 28px;
}

.guide-section h2 {
  font-size: 22px;
  line-height: 1.25;
  margin: 0 0 10px;
}

.guide-section p {
  margin: 0;
}

.guide-section p + p {
  margin-top: 12px;
}

.how-steps {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.how-step {
  align-items: center;
  border-top: 1px solid #d8dee4;
  display: grid;
  gap: 22px;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  padding-top: 18px;
}

.how-step-copy {
  min-width: 0;
}

.how-step-number {
  align-items: center;
  background: #111827;
  border-radius: 999px;
  color: #ffffff;
  display: inline-flex;
  font-size: 13px;
  font-weight: 750;
  height: 26px;
  justify-content: center;
  line-height: 1;
  margin-bottom: 10px;
  width: 26px;
}

.how-step h3 {
  font-size: 18px;
  line-height: 1.35;
  margin: 0 0 8px;
}

.how-demo {
  background: #ffffff;
  border: 1px solid #d8dee4;
  border-radius: 8px;
  padding: 16px;
}

.how-demo-word {
  display: flex;
  gap: 7px;
  justify-content: center;
}

.how-tile {
  align-items: center;
  background: #f7f8f9;
  border: 1px solid rgba(0, 0, 0, 0.3);
  color: #111827;
  display: inline-flex;
  font-size: 18px;
  font-weight: 800;
  height: 38px;
  justify-content: center;
  width: 38px;
}

.how-tile-correct {
  background: #00c800;
  border-color: rgba(0, 0, 0, 0.3);
  color: #111827;
}

.how-tile-present {
  background: #ffff00;
  border-color: rgba(0, 0, 0, 0.3);
  box-shadow: none;
}

.how-tile-absent {
  background: #f7f8f9;
  border-color: rgba(0, 0, 0, 0.3);
  color: #111827;
}

.how-demo-remaining {
  align-items: center;
  display: flex;
  gap: 10px;
  justify-content: center;
}

.how-demo-remaining span {
  color: #69727d;
  font-size: 14px;
}

.how-demo-remaining strong {
  color: #111827;
  font-size: 24px;
  line-height: 1;
}

.how-demo-flow {
  align-items: center;
  display: grid;
  gap: 8px;
  justify-items: center;
  text-align: center;
}

.how-demo-flow span {
  background: #f7f8f9;
  border: 1px solid #d8dee4;
  border-radius: 6px;
  color: #1f2933;
  font-size: 14px;
  font-weight: 650;
  padding: 7px 10px;
  width: 100%;
}

.how-demo-flow b {
  color: #6b7280;
  font-size: 16px;
  line-height: 1;
}

.guide-faqs {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.guide-faq h3 {
  font-size: 18px;
  line-height: 1.35;
  margin: 0 0 6px;
}

.guide-faq p {
  margin: 0;
}

#site-footer {
  background: #f2f3f5;
  border-top: 1px solid #d6dbe1;
  color: #1f2933;
  padding: 0 max(24px, calc((100vw - 980px) / 2)) 160px;
}

.static-document #site-footer {
  padding-bottom: 0;
}

.site-footer-inner {
  padding: 34px 0 16px;
}

.site-footer-main {
  display: grid;
  gap: 64px;
  grid-template-columns: minmax(260px, 1.2fr) minmax(420px, 2fr);
}

.site-footer-brand p {
  color: #5f6b76;
  font-size: 15px;
  line-height: 1.55;
  margin: 14px 0 0;
  max-width: 330px;
}

.site-footer-logo-row {
  align-items: center;
  display: flex;
  gap: 10px;
}

.site-footer-mark {
  align-items: center;
  background: #ffffff;
  border: 1px solid #d1d5db;
  border-radius: 7px;
  color: #111827;
  display: inline-flex;
  font-size: 16px;
  font-weight: 800;
  height: 28px;
  justify-content: center;
  letter-spacing: 0;
  line-height: 1;
  width: 28px;
}

.site-footer-mark::before {
  content: '1K';
}

.site-footer-name {
  color: #111827;
  font-size: 24px;
  font-weight: 750;
  line-height: 1;
}

.site-footer-columns {
  display: grid;
  gap: 44px;
  grid-template-columns: repeat(3, minmax(120px, 1fr));
}

.site-footer-column {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.site-footer-column h2 {
  color: #6b7280;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  line-height: 1.2;
  margin: 0 0 4px;
  text-transform: uppercase;
}

.site-footer-column a {
  color: #1f2933;
  font-size: 15px;
  line-height: 1.35;
  text-decoration: none;
}

.site-footer-column a:hover {
  color: #000000;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-footer-bottom {
  border-top: 1px solid #d6dbe1;
  color: #69727d;
  display: flex;
  flex-wrap: wrap;
  font-size: 13px;
  gap: 8px 14px;
  line-height: 1.5;
  margin-top: 30px;
  padding-top: 16px;
}

.site-footer-bottom span + span::before {
  content: '·';
  margin-right: 14px;
}

.static-page {
  background: #f7f8f9;
  border-top: 1px solid #d8dee4;
  min-height: calc(100vh - 180px);
  padding: 48px max(20px, calc((100vw - 860px) / 2));
}

.static-page-hero {
  margin: 0 auto 32px;
  max-width: 760px;
}

.static-page-hero h1 {
  font-size: 38px;
  line-height: 1.15;
  margin: 0 0 16px;
}

.static-page-hero p {
  margin: 0 0 12px;
}

.static-page-updated {
  color: #52606d;
  font-size: 14px;
}

.static-page-sections {
  display: grid;
  gap: 18px;
  margin: 0 auto;
  max-width: 860px;
}

.static-page-section {
  background: #ffffff;
  border: 1px solid #d8dee4;
  border-radius: 8px;
  padding: 24px;
}

.static-page-section h2 {
  font-size: 22px;
  margin: 0 0 12px;
}

.static-page-section p {
  margin: 0;
}

.static-page-section p + p,
.static-page-section p + ul {
  margin-top: 12px;
}

.static-page-section ul {
  margin: 0;
  padding-left: 20px;
}

.static-page-section li + li {
  margin-top: 8px;
}

@media (max-width: 760px) {
  #site-header {
    align-items: center;
    flex-direction: row;
    gap: 12px;
    min-height: 0;
    padding: 14px 18px;
  }

  .site-brand {
    min-width: 0;
    width: auto;
  }

  .site-brand::before {
    height: 34px;
    width: 34px;
  }

  .site-brand-name {
    font-size: 22px;
  }

  .site-brand-tagline {
    font-size: 13px;
  }

  .site-nav {
    display: none;
  }

  .site-mobile-menu {
    display: block;
    margin-left: auto;
    position: relative;
  }

  .site-mobile-menu summary {
    align-items: center;
    background: #ffffff;
    border: 1px solid #cfd6de;
    border-radius: 8px;
    cursor: pointer;
    display: inline-flex;
    flex-direction: column;
    gap: 5px;
    height: 44px;
    justify-content: center;
    list-style: none;
    width: 44px;
  }

  .site-mobile-menu summary::-webkit-details-marker {
    display: none;
  }

  .site-mobile-menu summary span {
    background: #111827;
    border-radius: 999px;
    display: block;
    height: 2px;
    width: 18px;
  }

  .site-mobile-menu[open] summary {
    background: #f3f4f6;
  }

  .site-mobile-menu nav {
    background: #ffffff;
    border: 1px solid #d6dbe1;
    border-radius: 8px;
    box-shadow: 0 18px 40px rgba(17, 24, 39, 0.16);
    display: grid;
    gap: 4px;
    min-width: 210px;
    padding: 8px;
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    z-index: 5;
  }

  .site-mobile-menu nav a {
    align-items: center;
    border-radius: 6px;
    color: #1f2933;
    display: flex;
    font-size: 15px;
    font-weight: 650;
    min-height: 44px;
    padding: 0 12px;
    text-decoration: none;
  }

  .site-mobile-menu nav a:hover {
    background: #f3f4f6;
    color: #111827;
  }

  #site-footer {
    padding: 0 22px 154px;
  }

  .static-document #site-footer {
    padding-bottom: 0;
  }

  .site-footer-inner {
    padding: 32px 0 24px;
  }

  .site-footer-main {
    display: grid;
    gap: 28px;
    grid-template-columns: 1fr;
  }

  .site-footer-brand p {
    font-size: 15px;
    margin-top: 12px;
    max-width: 360px;
  }

  .site-footer-columns {
    display: grid;
    gap: 28px 32px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-footer-column {
    gap: 9px;
  }

  .site-footer-column h2 {
    margin-bottom: 3px;
  }

  .site-footer-column a {
    font-size: 15px;
    min-height: 26px;
  }

  .site-footer-bottom {
    display: block;
    margin-top: 28px;
    padding-top: 16px;
  }

  .site-footer-bottom span {
    display: block;
  }

  .site-footer-bottom span + span {
    margin-top: 8px;
  }

  .site-footer-bottom span + span::before {
    content: '';
    margin-right: 0;
  }

  .guide-intro h1 {
    font-size: 28px;
  }

  .how-step {
    align-items: stretch;
    gap: 14px;
    grid-template-columns: 1fr;
  }

  .how-demo {
    padding: 14px;
  }

  .static-page-hero h1 {
    font-size: 30px;
  }

}

@media (max-width: 420px) {
  .site-brand-tagline {
    display: none;
  }

  .site-mobile-menu nav {
    min-width: min(240px, calc(100vw - 36px));
  }

  .site-footer-columns {
    grid-template-columns: 1fr;
  }

  .how-demo-word {
    gap: 5px;
  }

  .how-tile {
    font-size: 16px;
    height: 34px;
    width: 34px;
  }
}