:root {
  --ko-green: #24da7e;
  --ko-green-light: #aaffc7;
  --ko-navy: navy;
  --ko-yellow: #ffc145;
  --ko-ink: rgba(0, 0, 0, .87);
  --ko-border: rgba(0, 0, 0, .1);
}

* {
  box-sizing: border-box;
}

html {
  overflow-y: auto;
}

body {
  margin: 0;
  background: #fff;
  color: var(--ko-ink);
  font-family: 'Avenir', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  text-align: center;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--ko-navy);
}

a:hover {
  color: #0000cc;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ko-navy);
  color: #fff;
  padding: 8px 14px;
  z-index: 10;
}

.skip-link:focus {
  left: 8px;
  top: 8px;
}

.site-header {
  background: var(--ko-green);
  box-shadow: 0 2px 6px rgba(0, 0, 0, .2);
  padding: 8px 12px;
}

.site-header__inner {
  max-width: 1040px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px 18px;
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
}

.site-header__brand img {
  display: block;
  width: 202px;
  max-width: 60vw;
  height: auto;
}

.site-header__nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  font-weight: bold;
}

.site-header__nav a {
  display: inline-block;
  padding: 4px 2px;
  color: var(--ko-navy);
  text-decoration: none;
}

.site-header__nav a:hover,
.site-header__nav a:focus {
  text-decoration: underline;
}

.site-header__nav a[aria-current="page"] {
  color: #fff;
}

.guide {
  max-width: 780px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

.guide-article {
  text-align: left;
}

.guide-intro {
  text-align: center;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--ko-green-light);
}

.guide-intro h1 {
  margin: 8px 0 12px;
  color: var(--ko-navy);
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1.2;
}

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

.guide-section h2 {
  margin: 0 0 10px;
  color: var(--ko-navy);
  font-size: 22px;
  line-height: 1.3;
}

.guide-section p {
  margin: 0 0 10px;
}

.guide-section ul,
.guide-section ol {
  margin: 0 0 10px;
  padding-left: 22px;
}

.guide-section li {
  margin-bottom: 6px;
}

.guide-example {
  background: #f4fff8;
  border-left: 5px solid var(--ko-green);
  border-radius: 6px;
  padding: 14px 16px;
}

.guide-strategy {
  background: #fffaf0;
  border-left: 5px solid var(--ko-yellow);
  border-radius: 6px;
  padding: 14px 16px;
}

.guide-faq details {
  border-bottom: 1px solid var(--ko-border);
  padding: 10px 0;
}

.guide-faq summary {
  cursor: pointer;
  font-weight: bold;
  color: var(--ko-navy);
}

.guide-faq details p {
  margin: 8px 0 0;
}

.guide-related ul {
  list-style: none;
  padding-left: 0;
}

.guide-related li {
  margin-bottom: 8px;
}

.guide-related a {
  display: inline-block;
  background: var(--ko-green-light);
  border-radius: 4px;
  padding: 8px 12px;
  font-weight: bold;
  text-decoration: none;
}

.guide-related a:hover,
.guide-related a:focus {
  background: var(--ko-green);
}

.play-button {
  display: inline-block;
  background: var(--ko-green);
  color: var(--ko-navy);
  font-weight: bold;
  text-decoration: none;
  border-radius: 20px;
  padding: 12px 28px;
  min-height: 44px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, .2);
}

.play-button:hover,
.play-button:focus {
  background: #1fc26f;
  color: var(--ko-navy);
}

.guide-intro__cta {
  margin-top: 16px;
}

.guide-footer-cta {
  margin-top: 32px;
  text-align: center;
}

.site-footer {
  background: #333;
  color: #fff;
  font-size: 13px;
  padding: 20px 16px 32px;
}

.site-footer a {
  color: #fff;
}

.site-footer a:hover,
.site-footer a:focus {
  color: var(--ko-green-light);
}

:focus-visible {
  outline: 3px solid var(--ko-yellow);
  outline-offset: 2px;
}

@media (max-width: 480px) {
  .site-header__nav ul {
    font-size: 13px;
    gap: 2px 10px;
  }

  .guide {
    padding: 16px 12px 32px;
  }

  .guide-section h2 {
    font-size: 19px;
  }
}