:root {
  color-scheme: light dark;
  --page: #f9f9f7;
  --surface: #fcfcfb;
  --ink: #0b0b0b;
  --ink-2: #52514e;
  --border: rgba(11, 11, 11, 0.14);
  --accent: #2a78d6;
  --accent-ink: #ffffff;
  --critical: #b12f2f;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #0d0d0d;
    --surface: #1a1a19;
    --ink: #f0efec;
    --ink-2: #c3c2b7;
    --border: rgba(255, 255, 255, 0.14);
    --accent: #3987e5;
    --critical: #e66767;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
  background: var(--page);
  color: var(--ink);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}

.gate {
  width: min(100%, 360px);
  padding: 32px 28px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
}

.mark {
  width: 28px;
  height: 28px;
  margin: 0 0 20px;
  border-radius: 7px;
  background: var(--accent);
}

h1 {
  margin: 0;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.lede {
  margin: 4px 0 24px;
  color: var(--ink-2);
}

.note {
  display: none;
  margin: 0 0 16px;
  color: var(--critical);
  font-weight: 600;
}

.note:target {
  display: block;
}

label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
}

input {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--page);
  color: var(--ink);
  font: inherit;
}

button {
  width: 100%;
  height: 42px;
  margin-top: 16px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

input:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}