:root {
  font-family: system-ui, sans-serif;
  color: #e6efff;
  background: #101b2b;
  color-scheme: dark;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
main {
  max-width: 1100px;
  margin: auto;
  padding: 24px;
}
h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin: 8px 0;
}
h2,
h3 {
  margin-top: 0;
}
.eyebrow {
  font-weight: 700;
  letter-spacing: 0.16em;
  color: #76dfc3;
}
.notice {
  padding: 14px;
  border: 1px solid #428c7e;
  border-radius: 8px;
  background: #16352f;
}
.panel {
  margin: 20px 0;
  padding: 22px;
  background: #1a2a41;
  border-radius: 12px;
}
.row {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
}
.row h2 {
  margin: 0;
}
.choices {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 20px 0;
}
.choices article {
  padding: 18px;
  border: 1px solid #48617c;
  border-radius: 8px;
}
.muted {
  color: #b0bfd1;
  line-height: 1.5;
}
label {
  display: block;
  margin: 12px 0;
}
input,
select,
button {
  font: inherit;
  border-radius: 6px;
  padding: 12px;
}
input,
select {
  display: block;
  width: 100%;
  margin-top: 8px;
  background: #101b2b;
  border: 1px solid #7289a1;
  color: #fff;
}
button {
  background: #76dfc3;
  color: #0a211b;
  border: 0;
  font-weight: 650;
  cursor: pointer;
}
button.secondary {
  background: #2c425e;
  color: #fff;
  border: 1px solid #7289a1;
}
button:disabled {
  opacity: 0.55;
  cursor: wait;
}
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid #ffd889;
  outline-offset: 3px;
}
#status {
  min-height: 24px;
}
#game-panel {
  margin-top: 20px;
}
iframe {
  display: block;
  width: 100%;
  height: 85svh;
  min-height: 500px;
  margin-top: 12px;
  border: 1px solid #7289a1;
  border-radius: 8px;
  background: #080d17;
}
[hidden] {
  display: none !important;
}
#login-form {
  max-width: 450px;
}
@media (max-width: 600px) {
  main {
    padding: 12px;
  }
  .choices {
    grid-template-columns: 1fr;
  }
  .panel {
    padding: 16px;
  }
  .row {
    flex-wrap: wrap;
  }
  iframe {
    height: 90svh;
  }
}