:root {
  --ink: #172026;
  --muted: #66717a;
  --line: #ddd8cf;
  --red: #b11322;
  --green: #0e6b57;
  --paper: #f5f2ec;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.install-shell {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 34px;
}

.install-card {
  width: min(920px, 100%);
  padding: clamp(28px, 5vw, 52px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 18px 48px rgba(17, 24, 39, .12);
}

.install-kicker {
  margin: 0 0 12px;
  color: var(--red);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1;
}

p {
  color: var(--muted);
  font-size: 18px;
}

.install-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.install-button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink);
  text-decoration: none;
  font: inherit;
  font-weight: 850;
  cursor: pointer;
}

.install-button.primary {
  border-color: var(--red);
  background: var(--red);
  color: #ffffff;
}

.install-grid,
.check-list {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.install-grid {
  grid-template-columns: repeat(2, 1fr);
}

.install-grid article,
.check-list div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfaf7;
}

.install-grid strong,
.install-grid span,
.check-list strong,
.check-list span {
  display: block;
}

.install-grid span,
.check-list strong {
  margin-top: 7px;
  color: var(--muted);
}

.check-list span {
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.check-list .is-bad span {
  color: var(--red);
}

.install-form {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

fieldset {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

legend {
  padding: 0 8px;
  color: var(--green);
  font-weight: 900;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 850;
  text-transform: uppercase;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--ink);
  font: inherit;
}

.install-error {
  padding: 14px 16px;
  border-left: 5px solid var(--red);
  border-radius: 8px;
  background: #fff0f1;
  color: var(--ink);
  font-weight: 800;
}

@media (max-width: 700px) {
  .install-grid {
    grid-template-columns: 1fr;
  }
}