:root {
  --color-paper: #f1f0eb;
  --color-paper-warm: #e7e5de;
  --color-graphite: #20272b;
  --color-graphite-soft: #4d585d;
  --color-safety-orange: #d95b22;
  --color-orange-dark: #a94116;
  --color-steel-blue: #496d7c;
  --color-steel-mist: #d5e0e1;
  --color-brushed-silver: #aeb6b5;
  --color-line: #aeb6b5;
  --color-line-dark: #66757a;
  --color-white: #ffffff;

  --font-heading: "Barlow Condensed", "Arial Narrow", sans-serif;
  --font-body: "IBM Plex Sans", Arial, sans-serif;

  --text-label: 0.75rem;
  --text-meta: 0.875rem;
  --text-body: 1rem;
  --text-lead: 1.125rem;
  --text-module: clamp(1.375rem, 2vw, 1.5rem);
  --text-section: clamp(1.75rem, 4vw, 2rem);
  --text-hero: clamp(2.5rem, 7vw, 4.5rem);

  --leading-label: 1.333;
  --leading-meta: 1.5;
  --leading-body: 1.625;
  --leading-lead: 1.556;
  --leading-heading: 0.98;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;

  --container-max: 75rem;
  --container-padding: 2rem;
  --section-space: var(--space-9);
  --card-padding: var(--space-5);

  --surface-page: var(--color-paper);
  --surface-raised: var(--color-paper-warm);
  --surface-technical: var(--color-steel-mist);
  --surface-dark: var(--color-graphite);

  --border-default: 1px solid var(--color-line);
  --border-dark: 1px solid var(--color-line-dark);
  --border-accent: 1px solid var(--color-safety-orange);

  --radius-none: 0;
  --radius-card: 0.125rem;
  --radius-control: 0.25rem;

  --shadow-overlay: 0 0.25rem 0.75rem rgb(32 39 43 / 10%);

  --transition-fast: 160ms ease-out;
  --transition-standard: 200ms ease-out;
}

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

html {
  min-width: 320px;
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background: var(--surface-page);
  color: var(--color-graphite);
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: 400;
  line-height: var(--leading-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main,
header,
footer,
section,
article,
aside,
nav,
figure,
form {
  min-width: 0;
}

img,
picture,
svg,
canvas,
video,
iframe {
  display: block;
  max-width: 100%;
}

img,
video {
  height: auto;
}

iframe {
  border: 0;
}

a {
  color: var(--color-steel-blue);
  overflow-wrap: anywhere;
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

a:hover {
  color: var(--color-orange-dark);
  text-decoration-color: currentcolor;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-safety-orange);
  outline-offset: 2px;
}

button,
input,
select,
textarea {
  color: inherit;
  font: inherit;
}

button,
[type="button"],
[type="reset"],
[type="submit"] {
  min-height: 2.75rem;
  border: 0;
  border-radius: var(--radius-control);
  cursor: pointer;
}

button:disabled,
input:disabled,
select:disabled,
textarea:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

input,
select,
textarea {
  width: 100%;
  min-height: 2.75rem;
  border: var(--border-default);
  border-radius: var(--radius-control);
  background: var(--color-white);
  padding: var(--space-3) var(--space-4);
}

textarea {
  min-height: 8rem;
  resize: vertical;
}

select {
  appearance: auto;
}

fieldset {
  min-width: 0;
  margin: 0;
  border: var(--border-default);
  padding: var(--space-4);
}

legend {
  padding-inline: var(--space-2);
}

label {
  display: inline-block;
  margin-block-end: var(--space-2);
  color: var(--color-graphite);
  font-size: var(--text-meta);
  font-weight: 600;
  line-height: var(--leading-meta);
}

::placeholder {
  color: var(--color-graphite-soft);
  opacity: 1;
}

hr {
  height: 1px;
  margin-block: var(--space-6);
  border: 0;
  background: var(--color-line);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-block: 0 var(--space-4);
  color: var(--color-graphite);
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: 0.035em;
  line-height: var(--leading-heading);
  overflow-wrap: anywhere;
  text-transform: uppercase;
}

h1 {
  font-size: var(--text-hero);
  line-height: 0.97;
}

h2 {
  font-size: var(--text-section);
}

h3 {
  font-size: var(--text-module);
  line-height: 1.08;
}

h4 {
  font-size: clamp(1.125rem, 2vw, 1.25rem);
  line-height: 1.12;
}

h5,
h6 {
  font-size: 1rem;
  line-height: 1.2;
}

p {
  margin-block: 0 var(--space-4);
}

small {
  font-size: var(--text-meta);
  line-height: var(--leading-meta);
}

strong {
  font-weight: 600;
}

em {
  font-style: italic;
}

ul,
ol {
  margin-block: 0 var(--space-4);
  padding-inline-start: 1.25rem;
}

ul ul,
ul ol,
ol ul,
ol ol {
  margin-block: var(--space-2) 0;
}

blockquote {
  margin-block: 0 var(--space-5);
  margin-inline: 0;
  border-inline-start: 3px solid var(--color-safety-orange);
  padding: var(--space-3) 0 var(--space-3) var(--space-4);
  color: var(--color-graphite-soft);
}

figure {
  margin: 0 0 var(--space-5);
}

figcaption {
  color: var(--color-graphite-soft);
  font-size: var(--text-meta);
  line-height: var(--leading-meta);
}

table {
  width: 100%;
  margin-block: 0 var(--space-5);
  border-collapse: collapse;
  border-spacing: 0;
  font-size: var(--text-meta);
}

th,
td {
  border-bottom: var(--border-default);
  padding: var(--space-3);
  text-align: start;
  vertical-align: top;
}

th {
  font-weight: 600;
}

code,
kbd,
samp,
pre {
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
}

code,
kbd,
samp {
  padding: 0.1em 0.3em;
  background: var(--color-paper-warm);
  color: var(--color-graphite);
}

pre {
  max-width: 100%;
  margin-block: 0 var(--space-5);
  overflow: auto;
  border: var(--border-default);
  padding: var(--space-4);
  background: var(--color-paper-warm);
  font-size: var(--text-meta);
  line-height: var(--leading-meta);
}

details {
  margin-block-end: var(--space-4);
  border-bottom: var(--border-default);
}

summary {
  min-height: 2.75rem;
  padding-block: var(--space-3);
  color: var(--color-graphite);
  cursor: pointer;
  font-weight: 600;
}

.container {
  width: min(100% - (2 * var(--container-padding)), var(--container-max));
  margin-inline: auto;
}

.section {
  padding-block: var(--section-space);
}

.surface-paper {
  background: var(--surface-page);
  color: var(--color-graphite);
}

.surface-warm {
  background: var(--surface-raised);
  color: var(--color-graphite);
}

.surface-technical {
  background-color: var(--surface-technical);
  background-image:
    linear-gradient(rgb(73 109 124 / 7%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(73 109 124 / 7%) 1px, transparent 1px);
  background-size: 1.5rem 1.5rem;
  color: var(--color-graphite);
}

.surface-dark {
  background: var(--surface-dark);
  color: var(--color-paper);
}

.surface-dark :is(h1, h2, h3, h4, h5, h6) {
  color: var(--color-white);
}

.surface-dark a {
  color: var(--color-white);
}

.surface-dark a:hover {
  color: var(--color-safety-orange);
}

.technical-label {
  display: inline-block;
  margin-block: 0 var(--space-2);
  color: var(--color-steel-blue);
  font-size: var(--text-label);
  font-weight: 600;
  letter-spacing: 0.12em;
  line-height: var(--leading-label);
  text-transform: uppercase;
}

.technical-label--accent {
  color: var(--color-safety-orange);
}

.surface-dark .technical-label {
  color: var(--color-brushed-silver);
}

.surface-dark .technical-label--accent {
  color: var(--color-safety-orange);
}

.lead {
  font-size: var(--text-lead);
  line-height: var(--leading-lead);
}

.card {
  border: var(--border-default);
  border-radius: var(--radius-card);
  background: var(--surface-raised);
  padding: var(--card-padding);
}

.card > :last-child {
  margin-block-end: 0;
}

.content-stack > :last-child,
.compact-content > :last-child {
  margin-block-end: 0;
}

.content-list {
  display: grid;
  gap: var(--space-2);
  margin-block: 0 var(--space-4);
  padding-inline-start: 1.25rem;
}

.button {
  display: inline-flex;
  min-width: 2.75rem;
  min-height: 2.75rem;
  max-width: 100%;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  padding: var(--space-3) var(--space-4);
  overflow-wrap: anywhere;
  font-family: var(--font-body);
  font-size: var(--text-meta);
  font-weight: 600;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  transition:
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);
}

.button:hover {
  text-decoration: none;
}

.button--primary {
  border-color: var(--color-safety-orange);
  background: var(--color-safety-orange);
  color: var(--color-white);
}

.button--primary:hover {
  border-color: var(--color-orange-dark);
  background: var(--color-orange-dark);
  color: var(--color-white);
}

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

.button--secondary:hover {
  border-color: var(--color-steel-blue);
  background: var(--color-graphite);
  color: var(--color-white);
}

.button--informative {
  border-color: var(--color-steel-blue);
  background: transparent;
  color: var(--color-steel-blue);
}

.button--informative:hover {
  border-color: var(--color-steel-blue);
  background: var(--color-steel-blue);
  color: var(--color-white);
}

.button--full {
  width: 100%;
}

.image-frame {
  overflow: hidden;
  border: 1px solid var(--color-graphite);
  border-radius: var(--radius-card);
  background: var(--color-paper-warm);
}

.image-frame img {
  width: 100%;
  object-fit: cover;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: var(--space-2);
  left: var(--space-2);
  transform: translateY(-150%);
  border: 1px solid var(--color-graphite);
  border-radius: var(--radius-control);
  background: var(--color-white);
  color: var(--color-graphite);
  padding: var(--space-3) var(--space-4);
  font-weight: 600;
}

.skip-link:focus {
  transform: translateY(0);
}

@media (max-width: 51.25rem) {
  :root {
    --container-padding: 1.25rem;
    --section-space: var(--space-8);
    --card-padding: 1.25rem;
  }

  .button {
    min-height: 3rem;
  }
}

@media (max-width: 30rem) {
  h1 {
    font-size: clamp(2.25rem, 13vw, 3rem);
  }

  .section {
    padding-block: var(--space-8);
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms;
    animation-duration: 0.01ms;
    animation-iteration-count: 1;
  }
}