:root {
  color-scheme: light dark;
  --background: #f4f6fb;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --text: #131722;
  --secondary: #5e6677;
  --accent: #315ee8;
  --accent-contrast: #ffffff;
  --border: rgba(24, 33, 55, 0.1);
  --shadow: 0 18px 60px rgba(31, 48, 86, 0.12);
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 10% 0%, rgba(86, 129, 255, 0.18), transparent 34rem),
    var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  line-height: 1.6;
}

main {
  width: min(760px, calc(100% - 36px));
  margin: 0 auto;
  padding: 72px 0 48px;
}

header { margin-bottom: 36px; }

.app-icon {
  display: block;
  width: 68px;
  height: 68px;
  margin-bottom: 28px;
  border-radius: 17px;
  box-shadow: 0 12px 30px rgba(48, 88, 221, 0.3);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(42px, 8vw, 64px);
  letter-spacing: -0.045em;
  line-height: 1.04;
}

h2 {
  margin: 38px 0 8px;
  font-size: 24px;
  letter-spacing: -0.02em;
}

p, li { color: var(--secondary); }
.intro { margin: 12px 0 0; font-size: 19px; }

nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.card, .document {
  border: 1px solid var(--border);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.card {
  padding: 24px;
  color: var(--text);
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease;
}

.card:hover { transform: translateY(-2px); border-color: rgba(49, 94, 232, 0.35); }
.card span { display: block; font-size: 20px; font-weight: 700; }
.card small { color: var(--secondary); font-size: 15px; }

.document { padding: clamp(24px, 6vw, 52px); }
.document h1 { font-size: clamp(36px, 7vw, 52px); }
.document a { color: var(--accent); }
.back { display: inline-block; margin-bottom: 28px; color: var(--accent); text-decoration: none; font-weight: 650; }
.updated { margin-top: 6px; font-size: 14px; }

.install-page {
  background:
    radial-gradient(circle at 50% -10rem, rgba(49, 94, 232, 0.14), transparent 30rem),
    var(--background);
}

.install-shell {
  width: min(640px, calc(100% - 36px));
  padding-top: 28px;
}

.install-hero {
  padding: 20px 0 40px;
  text-align: center;
}

.install-hero-icon {
  display: block;
  width: 96px;
  height: 96px;
  margin: 0 auto 24px;
  border-radius: 22px;
  box-shadow: 0 14px 32px rgba(35, 74, 195, 0.22);
}

.install-hero h1 {
  margin: 0;
  font-size: clamp(42px, 10vw, 58px);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.install-summary {
  max-width: 460px;
  margin: 14px auto 0;
  font-size: clamp(17px, 4.2vw, 19px);
  line-height: 1.45;
}

.install-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 26px;
}

.install-primary,
.install-secondary {
  display: inline-flex;
  width: min(100%, 330px);
  min-height: 56px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 24px;
  border-radius: 16px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  transition: transform 120ms var(--ease-out);
}

.install-primary {
  background: var(--accent);
  box-shadow: 0 8px 20px rgba(49, 94, 232, 0.2);
  color: var(--accent-contrast);
}

.install-secondary {
  border: 1px solid var(--border);
  background: var(--surface-strong);
  color: var(--text);
}

.install-primary:active,
.install-secondary:active {
  transform: scale(0.97);
  transition-duration: 80ms;
}

.install-primary:focus-visible,
.install-secondary:focus-visible,
.source-row button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.install-requirement {
  max-width: 450px;
  margin: 14px auto 0;
  font-size: 14px;
  line-height: 1.5;
}

.install-steps {
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface-strong);
  box-shadow: 0 10px 30px rgba(31, 48, 86, 0.06);
}

.install-steps h2,
.install-footnote h2 {
  margin: 0;
  font-size: 22px;
}

.install-steps ol {
  display: grid;
  gap: 22px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.install-steps li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 14px;
  align-items: start;
}

.install-steps p {
  margin: 2px 0 0;
}

.install-steps a {
  color: var(--accent);
  font-weight: 650;
}

.install-steps strong {
  display: block;
  margin-bottom: 2px;
  color: var(--text);
}

.step-number {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: rgba(49, 94, 232, 0.11);
  color: var(--accent);
  font-size: 15px;
  font-weight: 750;
}

.manual-install {
  margin-top: 34px;
  padding: 0 2px 30px;
  border-top: 1px solid var(--border);
}

.manual-install summary {
  padding-top: 26px;
  color: var(--text);
  cursor: pointer;
  font-weight: 650;
}

.source-row {
  display: grid;
  gap: 12px;
}

.source-row code {
  display: block;
  padding: 12px;
  border-radius: 12px;
  background: rgba(49, 94, 232, 0.08);
  overflow-wrap: anywhere;
  color: var(--text);
  font-size: 13px;
}

.source-row button {
  width: fit-content;
  min-height: 44px;
  padding: 0 16px;
  border: 0;
  border-radius: 12px;
  background: var(--accent);
  color: var(--accent-contrast);
  cursor: pointer;
  font: inherit;
  font-weight: 650;
}

.copy-status {
  min-height: 1.5em;
  margin: 8px 0 0;
  font-size: 14px;
}

.install-footnote {
  padding-top: 2px;
}

.install-footnote p {
  margin: 8px 0 0;
  font-size: 14px;
}

footer { margin-top: 44px; color: var(--secondary); font-size: 13px; }

@media (hover: hover) and (pointer: fine) {
  .install-primary:hover,
  .install-secondary:hover {
    transform: translateY(-1px);
  }
}

@media (max-width: 560px) {
  main { padding-top: 40px; }
  nav { grid-template-columns: 1fr; }
  .install-shell { padding-top: 20px; }
  .install-hero { padding: 18px 0 34px; }
  .install-steps { padding: 24px 20px; }
  .install-primary,
  .install-secondary { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .card, .install-primary, .install-secondary { transition-duration: 0.01ms; }
}

@media (prefers-reduced-transparency: reduce) {
  .card, .document {
    background: var(--surface-strong);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

@media (prefers-contrast: more) {
  .card, .document, .install-steps, .install-secondary { border-color: var(--text); }
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #0c0f16;
    --surface: rgba(25, 30, 41, 0.82);
    --surface-strong: #171b25;
    --text: #f3f5fb;
    --secondary: #a9b0bf;
    --accent: #8aa5ff;
    --accent-contrast: #10131c;
    --border: rgba(255, 255, 255, 0.1);
    --shadow: 0 18px 60px rgba(0, 0, 0, 0.24);
  }
}