:root {
  color: #102f4f;
  background: #e8f1fb;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 10% 0%, rgba(116, 172, 223, 0.34), transparent 34%),
    radial-gradient(circle at 90% 0%, rgba(246, 191, 59, 0.2), transparent 30%),
    linear-gradient(180deg, #f7fbff 0%, #e8f1fb 100%);
}

a {
  color: #126aa5;
}

.site-header {
  border-top: 6px solid #74acdf;
  border-bottom: 1px solid rgba(20, 85, 146, 0.16);
  background: rgba(255, 255, 255, 0.93);
}

.site-header-inner,
.site-main,
.site-footer {
  width: min(820px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 0;
}

.brand {
  color: #0d2b4a;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.4px;
  text-decoration: none;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 7px 14px;
}

.site-nav a {
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.site-main {
  padding: 42px 0 64px;
}

.eyebrow {
  color: #1b71ad;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: #0d2b4a;
  line-height: 1.12;
}

h1 {
  max-width: 760px;
  margin: 8px 0 16px;
  font-size: clamp(2.1rem, 6vw, 3.8rem);
}

h2 {
  margin: 36px 0 10px;
  font-size: 1.7rem;
}

h3 {
  margin: 24px 0 8px;
  font-size: 1.2rem;
}

p,
li {
  color: #3d5872;
  font-size: 1rem;
}

.lead {
  max-width: 700px;
  color: #244b70;
  font-size: 1.15rem;
}

.notice,
.content-box {
  border: 1px solid rgba(31, 134, 209, 0.2);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.82);
  padding: 18px 20px;
}

.notice {
  border-left: 4px solid #f0b429;
  margin: 26px 0;
}

.notice p {
  margin: 0;
}

.steps {
  display: grid;
  gap: 14px;
  margin: 18px 0;
  padding: 0;
  list-style: none;
  counter-reset: game-step;
}

.steps li {
  counter-increment: game-step;
  position: relative;
  border: 1px solid rgba(31, 134, 209, 0.18);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.88);
  padding: 16px 18px 16px 58px;
}

.steps li::before {
  content: counter(game-step);
  position: absolute;
  top: 15px;
  left: 17px;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  background: #2694e8;
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  line-height: 25px;
  text-align: center;
}

.steps strong {
  color: #123b60;
}

.two-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.two-columns .content-box {
  height: 100%;
}

dt {
  margin-top: 16px;
  color: #123b60;
  font-weight: 800;
}

dd {
  margin: 4px 0 0;
  color: #3d5872;
}

.back-link {
  display: inline-flex;
  margin-top: 28px;
  border-radius: 10px;
  background: #2694e8;
  color: #fff;
  padding: 10px 15px;
  font-weight: 800;
  text-decoration: none;
}

.site-footer {
  border-top: 1px solid rgba(20, 85, 146, 0.18);
  padding: 22px 0 38px;
}

.site-footer p {
  margin: 0 0 10px;
  font-size: 0.9rem;
  font-weight: 700;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.footer-links a {
  font-size: 0.85rem;
}

@media (max-width: 640px) {
  .site-header-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .site-main {
    padding-top: 30px;
  }

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