:root {
  --color-paper: #F5F0E6;
  --color-ink: #36454F;
  --color-crimson: #8B0000;
  --color-cobalt: #0047AB;
  --color-felt: #1B4D3E;
  --color-graphite: #36454F;
  --color-paper-light: #FFFFFF;
  --color-ink-soft: #5A6A72;
  --color-border-light: rgba(54, 69, 79, 0.2);
  --color-border-dark: rgba(245, 240, 230, 0.2);
  --color-shadow: rgba(0, 0, 0, 0.1);
  --color-focus: #0047AB;

  --font-heading: 'Oswald', sans-serif;
  --font-body: 'Source Sans 3', sans-serif;

  --text-display-size: clamp(2.5rem, 5vw, 3.5rem);
  --text-display-line-height: 1.1;
  --text-display-weight: 700;
  --text-h1-size: clamp(2rem, 4vw, 2.5rem);
  --text-h1-line-height: 1.2;
  --text-h1-weight: 600;
  --text-h2-size: clamp(1.5rem, 3vw, 2rem);
  --text-h2-line-height: 1.3;
  --text-h2-weight: 600;
  --text-h3-size: 1.5rem;
  --text-h3-line-height: 1.4;
  --text-h3-weight: 600;
  --text-body-size: 1rem;
  --text-body-line-height: 1.7;
  --text-body-weight: 400;
  --text-small-size: 0.875rem;
  --text-small-line-height: 1.5;
  --text-small-weight: 400;

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

  --container-max: 1200px;
  --container-padding: 1.5rem;
  --section-padding-y: clamp(4rem, 8vw, 6rem);
  --card-padding: clamp(1.5rem, 3vw, 2rem);
  --grid-gap: clamp(1.5rem, 3vw, 2rem);

  --radius-none: 0px;
  --radius-small: 4px;
  --radius-medium: 8px;

  --border-width-thin: 1px;
  --border-width-film: 2px;

  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.1);

  --transition-fast: 150ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body-size);
  font-weight: var(--text-body-weight);
  line-height: var(--text-body-line-height);
  color: var(--color-ink);
  background-color: var(--color-paper);
  min-height: 100vh;
  max-width: 100%;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  margin-block-end: var(--space-3);
}

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

h2 {
  font-size: var(--text-h2-size);
  line-height: var(--text-h2-line-height);
  font-weight: var(--text-h2-weight);
}

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

h4 {
  font-size: 1.25rem;
  line-height: 1.4;
  font-weight: 600;
}

h5 {
  font-size: 1.125rem;
  line-height: 1.4;
  font-weight: 600;
}

h6 {
  font-size: 1rem;
  line-height: 1.4;
  font-weight: 600;
}

p {
  font-size: var(--text-body-size);
  line-height: var(--text-body-line-height);
  margin-block-end: var(--space-3);
}

p:last-child {
  margin-block-end: 0;
}

a {
  color: var(--color-crimson);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-crimson);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-cobalt);
  outline-offset: 2px;
  border-radius: var(--radius-small);
}

ul,
ol {
  margin-block-end: var(--space-3);
  padding-inline-start: var(--space-4);
}

ul:last-child,
ol:last-child {
  margin-block-end: 0;
}

li {
  line-height: var(--text-body-line-height);
}

blockquote {
  margin-block-end: var(--space-3);
  padding-inline-start: var(--space-4);
  border-inline-start: 2px solid var(--color-crimson);
  font-style: italic;
  color: var(--color-ink-soft);
}

blockquote:last-child {
  margin-block-end: 0;
}

figure {
  margin-block-end: var(--space-3);
}

figure:last-child {
  margin-block-end: 0;
}

figcaption {
  font-size: var(--text-small-size);
  line-height: var(--text-small-line-height);
  color: var(--color-ink-soft);
  margin-block-start: var(--space-2);
}

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

img {
  border-radius: var(--radius-medium);
}

hr {
  border: none;
  border-block-start: var(--border-width-thin) solid var(--color-border-light);
  margin-block: var(--space-5);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-block-end: var(--space-3);
}

table:last-child {
  margin-block-end: 0;
}

th,
td {
  text-align: start;
  padding: var(--space-2) var(--space-3);
  border-block-end: var(--border-width-thin) solid var(--color-border-light);
}

th {
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-size: var(--text-small-size);
}

form {
  margin-block-end: var(--space-3);
}

form:last-child {
  margin-block-end: 0;
}

fieldset {
  border: var(--border-width-thin) solid var(--color-border-light);
  border-radius: var(--radius-small);
  padding: var(--space-4);
  margin-block-end: var(--space-3);
}

legend {
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  padding-inline: var(--space-2);
}

label {
  display: block;
  font-weight: 600;
  margin-block-end: var(--space-2);
  color: var(--color-ink);
}

input,
select,
textarea {
  font-family: var(--font-body);
  font-size: var(--text-body-size);
  line-height: var(--text-body-line-height);
  color: var(--color-ink);
  background-color: var(--color-paper-light);
  border: var(--border-width-thin) solid var(--color-border-light);
  border-radius: var(--radius-small);
  padding: var(--space-2) var(--space-3);
  width: 100%;
  max-width: 100%;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-cobalt);
  box-shadow: 0 0 0 2px rgba(0, 71, 171, 0.2);
}

input::placeholder,
textarea::placeholder {
  color: var(--color-ink-soft);
  opacity: 1;
}

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

button,
input[type="submit"],
input[type="reset"],
input[type="button"] {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-size: var(--text-small-size);
  line-height: 1.5;
  color: var(--color-paper);
  background-color: var(--color-crimson);
  border: none;
  border-radius: var(--radius-small);
  padding: var(--space-2) var(--space-4);
  cursor: pointer;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

button:hover,
input[type="submit"]:hover,
input[type="reset"]:hover,
input[type="button"]:hover {
  background-color: #6b0000;
}

button:focus-visible,
input[type="submit"]:focus-visible,
input[type="reset"]:focus-visible,
input[type="button"]:focus-visible {
  outline: 2px solid var(--color-cobalt);
  outline-offset: 2px;
}

button:disabled,
input[type="submit"]:disabled,
input[type="reset"]:disabled,
input[type="button"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

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

.surface-card {
  background-color: var(--color-paper-light);
  border: var(--border-width-thin) solid var(--color-border-light);
  border-radius: var(--radius-small);
  padding: var(--card-padding);
}

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

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

.surface-dark p,
.surface-dark li,
.surface-dark blockquote,
.surface-dark figcaption {
  color: var(--color-paper);
}

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

.surface-dark a:hover {
  color: var(--color-paper);
  text-decoration: underline;
}

.film-frame {
  border: var(--border-width-film) solid var(--color-crimson);
  border-radius: var(--radius-medium);
  padding: var(--space-2);
  background-color: var(--color-paper-light);
}

.film-frame img {
  border-radius: var(--radius-small);
  display: block;
  width: 100%;
  height: auto;
  filter: grayscale(100%);
  transition: filter var(--transition-slow);
}

.film-frame img:hover {
  filter: grayscale(0%);
}

.flex {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.flex > * {
  min-width: 0;
  flex-shrink: 1;
}

.flex-nowrap {
  flex-wrap: nowrap;
}

.flex-column {
  flex-direction: column;
}

.flex-center {
  align-items: center;
  justify-content: center;
}

.flex-between {
  align-items: center;
  justify-content: space-between;
}

.flex-start {
  align-items: flex-start;
  justify-content: flex-start;
}

.flex-end {
  align-items: flex-end;
  justify-content: flex-end;
}

.flex-grow {
  flex-grow: 1;
}

.flex-no-shrink {
  flex-shrink: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-3);
  z-index: 1000;
  background-color: var(--color-crimson);
  color: var(--color-paper);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-small);
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-3);
  color: var(--color-paper);
  text-decoration: none;
}

@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
    --card-padding: 1.25rem;
    --section-padding-y: 3rem;
  }
}

@media (max-width: 480px) {
  :root {
    --container-padding: 0.75rem;
    --card-padding: 1rem;
    --section-padding-y: 2.5rem;
  }
}