/* Fonts are served locally; licences sit next to the files. */
@font-face {
  font-family: "DM Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(/assets/fonts/dm-sans-1.ttf) format("truetype");
}
@font-face {
  font-family: "Instrument Serif";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(/assets/fonts/instrument-serif-2.ttf) format("truetype");
}
@font-face {
  font-family: "Instrument Serif";
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url(/assets/fonts/instrument-serif-1.ttf) format("truetype");
}

:root {
  --paper: #f6f3ec;
  --paper-deep: #ece7db;
  --ink: #17181c;
  --ink-soft: #2b2d33;
  --muted: #55585f;
  --rule: #d8d2c4;
  --accent: #9a3f1a;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --serif: "Instrument Serif", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: "DM Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
p,
ol,
ul {
  margin: 0;
}

h1,
h2 {
  font-family: var(--serif);
  font-weight: 400;
  text-wrap: balance;
}

ol,
ul {
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.wrap {
  width: min(100% - 2 * var(--gutter), 74rem);
  margin-inline: auto;
}

.skip {
  position: absolute;
  top: -5rem;
  left: var(--gutter);
  z-index: 10;
  padding: 0.5rem 0.9rem;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
}
.skip:focus {
  top: 0.75rem;
}

/* Masthead */
.masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1.5rem;
  padding-block: 1.75rem;
}
.wordmark {
  font-family: var(--serif);
  font-size: 1.5rem;
  line-height: 1.1;
  text-decoration: none;
}
.masthead nav a {
  padding-block: 0.25rem;
  border-bottom: 1px solid transparent;
  font-size: 0.9375rem;
  text-decoration: none;
}
.masthead nav a:hover,
.masthead nav a[aria-current="page"] {
  border-bottom-color: currentColor;
}

/* Opening */
.hero {
  padding-block: clamp(3.5rem, 11vw, 9rem) clamp(3rem, 8vw, 6.5rem);
}
.hero h1 {
  max-width: 14ch;
  font-size: clamp(3.25rem, 10.5vw, 8.25rem);
  line-height: 0.93;
  letter-spacing: -0.025em;
}
.hero__lead {
  max-width: 27ch;
  margin-top: clamp(1.5rem, 3.5vw, 2.75rem);
  color: var(--ink-soft);
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.9vw, 2.25rem);
  line-height: 1.2;
  text-wrap: balance;
}
.hero--page {
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}
.hero__lead--long {
  max-width: 44ch;
  font-size: clamp(1.375rem, 2.3vw, 1.875rem);
  line-height: 1.3;
  text-wrap: pretty;
}

/* Shared two-column rhythm: a narrow heading column, a reading column. */
.question,
.area {
  display: grid;
  gap: 1.5rem clamp(1.5rem, 4vw, 4rem);
  border-top: 1px solid var(--rule);
}
@media (min-width: 56rem) {
  .question,
  .area {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

.question {
  padding-block: clamp(2.5rem, 6vw, 5rem);
}
.question__lead {
  color: var(--muted);
}
.question__text {
  max-width: 21ch;
  margin-top: 0.75rem;
  font-family: var(--serif);
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
  font-style: italic;
  line-height: 1.15;
  text-wrap: balance;
}
.question__body {
  max-width: 60ch;
  align-self: end;
}

/* Index of the five areas */
.index {
  border-top: 1px solid var(--rule);
}
.index a {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding-block: 0.85rem;
  text-decoration: none;
}
.index li + li {
  border-top: 1px solid var(--rule);
}
.index__num,
.area__num {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}
.index__num {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}
.index__name {
  font-size: 0.9375rem;
  line-height: 1.3;
}
.index a:hover .index__name {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.3em;
}
@media (min-width: 62rem) {
  .index ol {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 1.5rem;
  }
  .index li + li {
    border-top: 0;
  }
  .index a {
    padding-block: 1.1rem;
  }
}

/* Areas of work and About chapters */
.area {
  padding-block: clamp(2.75rem, 6.5vw, 5.5rem);
  scroll-margin-top: 1rem;
}
.area__meta {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}
.area h2 {
  font-size: clamp(2.125rem, 4.4vw, 3.5rem);
  line-height: 1.02;
  letter-spacing: -0.015em;
}
.area--chapter h2 {
  font-size: clamp(1.875rem, 3.3vw, 2.625rem);
  line-height: 1.08;
}
.area__body {
  max-width: 60ch;
}
.area__body p + p {
  margin-top: 1.1em;
}

/* Onward links */
.go {
  margin-top: 1.75rem;
}
.go a {
  display: inline-block;
  text-decoration: none;
}
.go__label {
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.35em;
}
.go a:hover .go__label {
  text-decoration-thickness: 2px;
}
.go__arrow {
  width: 1em;
  height: 1em;
  margin-left: 0.5rem;
  color: var(--accent);
  vertical-align: -0.12em;
  transition: transform 0.2s ease;
}
.go a:hover .go__arrow {
  transform: translateX(0.25rem);
}
@media (prefers-reduced-motion: reduce) {
  .go__arrow {
    transition: none;
  }
}
.go--pending {
  color: var(--muted);
}

/* Closing band */
.closing {
  background: var(--paper-deep);
}
.closing__inner {
  max-width: 46rem;
  padding-block: clamp(3.5rem, 9vw, 7.5rem);
}
.closing h2 {
  font-size: clamp(2.25rem, 5vw, 4rem);
  line-height: 1;
  letter-spacing: -0.015em;
}
.closing h2 + p {
  margin-top: 1.5rem;
  font-size: 1.125rem;
}
.closing--link .closing__inner {
  padding-block: clamp(2.5rem, 5vw, 4rem);
}
.closing--link .go {
  margin-top: 0;
  font-size: 1.125rem;
}

/* Footer */
.footer {
  padding-block: 2.5rem 3rem;
  color: var(--muted);
  font-size: 0.9375rem;
}
.footer__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem 2.5rem;
}
.footer__name {
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.25rem;
}
.footer ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.5rem;
}
.footer a {
  display: inline-block;
  padding-block: 0.25rem;
  text-decoration: none;
}
.footer a:hover {
  text-decoration: underline;
  text-underline-offset: 0.3em;
}