:root {
  color-scheme: light dark;
  --fg: #16181d;
  --muted: #5c6270;
  --bg: #f7f8fa;
  --card: #ffffff;
  --line: #dfe2e8;
  --accent: #1f5eff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e8eaef;
    --muted: #9aa1b1;
    --bg: #14161a;
    --card: #1c1f26;
    --line: #2b2f38;
    --accent: #6f95ff;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0 1rem 3rem;
  font-family:
    system-ui,
    -apple-system,
    "Segoe UI",
    sans-serif;
  color: var(--fg);
  background: var(--bg);
}

header {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1.5rem 0 1rem;
  border-bottom: 1px solid var(--line);
}

h1 {
  margin: 0;
  font-size: 1.4rem;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1rem;
  margin: 0 0 0.5rem;
}

main {
  max-width: 60rem;
  margin: 0 auto;
}

section {
  margin-top: 2rem;
  padding: 1.25rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0.75rem;
}

.muted {
  color: var(--muted);
  font-size: 0.875rem;
  margin: 0.25rem 0 0;
}

.status {
  font-size: 0.875rem;
  min-height: 1.25rem;
  color: var(--muted);
}

.status.error {
  color: #c0392b;
}

form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: flex-end;
  margin-top: 1rem;
}

label {
  display: block;
  font-size: 0.8125rem;
  color: var(--muted);
  width: 100%;
}

input {
  flex: 1 1 16rem;
  padding: 0.55rem 0.7rem;
  font: inherit;
  color: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
}

button {
  padding: 0.55rem 1rem;
  font: inherit;
  color: #fff;
  background: var(--accent);
  border: 0;
  border-radius: 0.5rem;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: progress;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

li button {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--line);
}

li button[aria-current="true"] {
  border-color: var(--accent);
  color: var(--accent);
}

iframe {
  width: 100%;
  min-height: 32rem;
  margin-top: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: #fff;
}

button.secondary {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--line);
}