:root {
  color-scheme: light dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #eef2f7;
  color: #172033;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  padding: clamp(1rem, 3vw, 2.5rem);
  background: linear-gradient(145deg, #f7f9fc, #dfe7f1);
}

main {
  width: min(74rem, 100%);
  margin: 0 auto;
}

header {
  margin-bottom: 1.5rem;
}

.eyebrow {
  margin: 0 0 0.35rem;
  color: #50617a;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 6vw, 4rem);
  letter-spacing: -0.05em;
}

header p:last-child {
  margin: 0.7rem 0 0;
  color: #50617a;
}

.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

button {
  min-height: 2.8rem;
  padding: 0.65rem 1.1rem;
  border: 1px solid #aab8ca;
  border-radius: 999px;
  background: #fff;
  color: #27344a;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}

button[aria-selected="true"] {
  border-color: #174e8f;
  background: #174e8f;
  color: #fff;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid #f2a900;
  outline-offset: 3px;
}

.viewer-shell {
  overflow: hidden;
  height: min(76vh, 58rem);
  min-height: 32rem;
  border: 1px solid #c3cedc;
  border-radius: 0.8rem;
  background: #fff;
  box-shadow: 0 1rem 3rem rgb(42 55 78 / 14%);
}

iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

.open-link {
  margin: 1rem 0 0;
}

a {
  color: #174e8f;
  font-weight: 650;
}

@media (prefers-color-scheme: dark) {
  :root {
    background: #0f1520;
    color: #edf3fb;
  }

  body {
    background: linear-gradient(145deg, #111927, #080c13);
  }

  .eyebrow,
  header p:last-child {
    color: #aebcd0;
  }

  button {
    border-color: #40516a;
    background: #182233;
    color: #e7eef8;
  }

  button[aria-selected="true"] {
    border-color: #6fa9ed;
    background: #3978c3;
  }

  .viewer-shell {
    border-color: #35445a;
    background: #202938;
  }

  a {
    color: #8ec1ff;
  }
}

@media (max-width: 40rem) {
  body {
    padding: 1rem;
  }

  .tabs button {
    flex: 1;
  }

  .viewer-shell {
    min-height: 28rem;
  }
}