:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --bg-elev: #ffffff;
  --ink: #142033;
  --muted: #3d4d63;
  --line: #d5deea;
  --link: #0b4f86;
  --button: #142033;
  --button-ink: #f4f7fb;
  --accent: #0e7490;
  --note: #e7f6f8;
  --note-ink: #12343c;
  --warn: #fff6e8;
  --warn-ink: #5c3b09;
  --shadow: 0 16px 40px rgba(20, 32, 51, 0.06);
  --serif: "Iowan Old Style", Palatino, "Palatino Linotype", Georgia, serif;
  --sans: "Avenir Next", "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", ui-monospace, "Cascadia Code", monospace;
  --measure: 42rem;
  --page: 72rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #070b12;
    --bg-elev: #101826;
    --ink: #e7eef8;
    --muted: #b7c4d6;
    --line: rgba(231, 238, 248, 0.16);
    --link: #9bd7ff;
    --button: #d7f6ff;
    --button-ink: #071018;
    --accent: #7ee7ff;
    --note: #10242c;
    --note-ink: #d7f6ff;
    --warn: #2a2114;
    --warn-ink: #ffe3b0;
    --shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #070b12;
  --bg-elev: #101826;
  --ink: #e7eef8;
  --muted: #b7c4d6;
  --line: rgba(231, 238, 248, 0.16);
  --link: #9bd7ff;
  --button: #d7f6ff;
  --button-ink: #071018;
  --accent: #7ee7ff;
  --note: #10242c;
  --note-ink: #d7f6ff;
  --warn: #2a2114;
  --warn-ink: #ffe3b0;
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
}

:root[data-theme="light"] {
  color-scheme: light;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(94, 231, 255, 0.08), transparent 28rem),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.05rem;
  line-height: 1.6;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--link);
  text-underline-offset: 0.16em;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 1rem;
  top: 0;
  transform: translateY(-120%);
  background: var(--button);
  color: var(--button-ink);
  padding: 0.6rem 0.9rem;
  z-index: 5;
}

.skip:focus {
  transform: none;
}

.site-header,
.site-footer,
main {
  width: min(var(--page), calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  padding: 1rem 0;
}

.brand {
  color: inherit;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  margin-left: auto;
}

.site-nav a {
  color: inherit;
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 0.28em;
}

.nav-toggle,
.theme-toggle,
button,
.button {
  font: inherit;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--ink);
  padding: 0.45rem 0.85rem;
  cursor: pointer;
  text-decoration: none;
}

.button {
  display: inline-block;
  background: var(--button);
  color: var(--button-ink);
  border-color: transparent;
}

.button-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.nav-toggle {
  display: none;
}

.hero {
  padding: 1.5rem 0 2rem;
}

.eyebrow,
.tagline {
  margin: 0;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

h1 {
  margin: 0.35rem 0 0.4rem;
  font-size: clamp(2.6rem, 6vw, 4.6rem);
}

.tagline {
  font-family: var(--serif);
  font-size: clamp(1.4rem, 3vw, 2rem);
}

.lede,
.prose,
.panel p,
.step p,
.faq dd {
  max-width: var(--measure);
}

.actions,
.choice-row,
.field-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: end;
}

.hero-art {
  margin: 1.5rem 0 0;
  background: #070b12;
  border-radius: 1.25rem;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hero-art img {
  display: block;
  width: 100%;
}

.grid,
.steps,
.split {
  display: grid;
  gap: 1rem;
}

.steps {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 1rem 0 2rem;
}

.step,
.panel,
.command,
.faq,
.table-wrap {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 1rem;
  box-shadow: var(--shadow);
}

.step,
.panel {
  padding: 1rem 1.1rem 1.15rem;
}

.step span {
  display: block;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
}

.split {
  grid-template-columns: 1.2fr 0.8fr;
  margin: 1rem 0 2rem;
}

.note,
.warn {
  border-radius: 1rem;
  padding: 0.9rem 1rem;
  max-width: 48rem;
}

.note {
  background: var(--note);
  color: var(--note-ink);
}

.warn {
  background: var(--warn);
  color: var(--warn-ink);
}

.note a,
.warn a {
  color: inherit;
}

.command {
  margin: 0.8rem 0 1rem;
  padding: 0.85rem 1rem 1rem;
}

.command header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

.command p,
.command h3 {
  margin: 0;
}

.command pre,
pre {
  overflow-x: auto;
  padding: 0.8rem;
  border-radius: 0.7rem;
  background: #071018;
  color: #e7eef8;
  font-family: var(--mono);
  font-size: 0.92rem;
  line-height: 1.45;
}

code {
  font-family: var(--mono);
  font-size: 0.92em;
}

.field {
  display: grid;
  gap: 0.3rem;
  min-width: min(100%, 14rem);
}

.field span,
legend {
  font-weight: 650;
}

input[type="text"],
fieldset {
  font: inherit;
  color: inherit;
}

input[type="text"] {
  border: 1px solid var(--line);
  background: var(--bg);
  border-radius: 0.7rem;
  padding: 0.55rem 0.7rem;
}

fieldset {
  border: 1px solid var(--line);
  border-radius: 0.9rem;
  margin: 1rem 0;
}

.check {
  display: flex;
  gap: 0.55rem;
  align-items: flex-start;
}

.table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 0.7rem 0.85rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.status {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.1rem 0.55rem;
  font-size: 0.85rem;
}

.faq {
  margin: 0.8rem 0;
  padding: 0.2rem 1rem 0.4rem;
}

.faq dt {
  font-weight: 700;
  margin-top: 0.8rem;
}

.faq dd {
  margin: 0.25rem 0 0.9rem;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.2rem;
  justify-content: space-between;
  padding: 2rem 0 3rem;
  color: var(--muted);
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1rem;
}

.error {
  color: #9a3412;
  font-weight: 650;
}

:root[data-theme="dark"] .error,
:root:not([data-theme="light"]) .error {
  color: #ffb4a2;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .error {
    color: #9a3412;
  }
}

@media (max-width: 800px) {
  .site-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
  }

  .brand {
    margin-right: auto;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: 0;
  }

  .site-nav {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    width: 100%;
    margin-left: 0;
    padding-bottom: 0.4rem;
  }

  .site-header.is-open .site-nav {
    display: flex;
  }

  .steps,
  .split {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media (prefers-contrast: more) {
  .step,
  .panel,
  .command,
  .faq,
  .table-wrap,
  .button-secondary,
  input[type="text"] {
    border-width: 2px;
  }
}