/* Lode & Keel. One stylesheet for every page.
   Palette (hue 80): paper #f4f6ee, sand #e3e8d8, ink #24281a,
   moss #586048, olive #49611a, khaki #a4c365. */

:root {
  --paper: #f4f6ee;
  --sand: #e3e8d8;
  --ink: #24281a;
  --moss: #586048;
  --olive: #49611a;
  --khaki: #a4c365;
  --serif: ui-serif, Charter, Georgia, serif;
  --gutter: 16px;
  --measure: 66ch;
  --wrap: 1200px;
}

@media (min-width: 720px) {
  :root {
    --gutter: 32px;
  }
}

@media (min-width: 1200px) {
  :root {
    --gutter: 48px;
  }
}

@keyframes settle {
  from {
    opacity: 0;
    transform: translateY(16px) rotate(var(--tilt));
  }
  to {
    opacity: 1;
    transform: rotate(var(--tilt));
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 24px;
}

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.0625rem, 0.98rem + 0.3vw, 1.1875rem);
  line-height: 1.65;
  overflow-wrap: break-word;
}

h1,
h2,
h3 {
  margin: 0 0 0.5em;
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.012em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.2rem, 1.25rem + 4vw, 4.9rem);
}

h2 {
  font-size: clamp(1.7rem, 1.25rem + 1.9vw, 2.75rem);
}

h3 {
  font-size: clamp(1.25rem, 1.1rem + 0.7vw, 1.6rem);
}

p {
  margin: 0 0 1em;
  max-width: var(--measure);
}

ul,
ol {
  margin: 0 0 1.25em;
  padding-left: 1.25em;
  max-width: var(--measure);
}

li {
  margin-bottom: 0.5em;
}

strong {
  font-weight: 700;
}

a {
  color: var(--olive);
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

a:hover {
  color: var(--ink);
  text-decoration-thickness: 2px;
}

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

main:focus {
  outline: none;
}

.skip-link {
  position: absolute;
  top: -120px;
  left: var(--gutter);
  z-index: 100;
  padding: 10px 16px;
  border: 2px solid var(--ink);
  background-color: var(--paper);
  color: var(--ink);
  font-weight: 700;
  text-decoration: none;
}

.skip-link:focus {
  top: 12px;
  outline: 3px solid var(--olive);
  outline-offset: 2px;
}

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

.kicker {
  margin: 0 0 12px;
  color: var(--olive);
  font-size: 1rem;
  font-variant: small-caps;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--moss);
  font-size: 1.05rem;
  font-variant: small-caps;
  letter-spacing: 0.06em;
}

.fine {
  margin-top: 12px;
  color: var(--moss);
  font-size: 0.95rem;
}

/* Header and navigation */

.site-header {
  border-bottom: 2px solid var(--ink);
  background-color: var(--paper);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-block: 16px;
}

.brand {
  color: var(--ink);
  font-size: clamp(1.4rem, 1.2rem + 0.8vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand-amp {
  color: var(--olive);
  font-style: italic;
  font-weight: 400;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  margin: 0;
  padding: 0;
  max-width: none;
  list-style: none;
}

.nav-list li {
  margin: 0;
}

.nav-list a {
  display: inline-block;
  padding-block: 4px;
  border-bottom: 2px solid var(--paper);
  color: var(--ink);
  text-decoration: none;
}

.nav-list a:hover {
  border-bottom-color: var(--olive);
}

.nav-list a[aria-current="page"] {
  border-bottom-color: var(--ink);
  font-weight: 700;
}

/* Shared blocks */

.page-hero {
  padding-block: clamp(40px, 7vw, 96px) clamp(24px, 4vw, 48px);
}

.lede {
  max-width: 40em;
  font-size: clamp(1.15rem, 1.02rem + 0.55vw, 1.4rem);
  line-height: 1.55;
}

.section {
  padding-block: clamp(40px, 7vw, 84px);
  border-top: 2px solid var(--ink);
}

.note {
  max-width: var(--measure);
  margin: 0 0 28px;
  padding: 18px 20px;
  border-left: 6px solid var(--olive);
  background-color: var(--sand);
  color: var(--ink);
}

.note > p:last-child {
  margin-bottom: 0;
}

.note .kicker {
  margin-bottom: 8px;
}

.button {
  display: inline-block;
  padding: 13px 22px;
  border: 2px solid var(--ink);
  background-color: var(--ink);
  color: var(--paper);
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.3;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 5px 5px 0 var(--khaki);
  transition: background-color 200ms ease, color 200ms ease, box-shadow 200ms ease, transform 200ms ease;
}

.button:hover {
  border-color: var(--olive);
  background-color: var(--olive);
  color: var(--paper);
}

.button:active {
  transform: translate(2px, 2px);
  box-shadow: 3px 3px 0 var(--khaki);
}

.button-quiet {
  background-color: var(--paper);
  color: var(--ink);
}

.button-quiet:hover {
  border-color: var(--ink);
  background-color: var(--sand);
  color: var(--ink);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 14px;
  margin-top: 28px;
}

/* Home: hero and collage */

.hero {
  padding-block: clamp(44px, 8vw, 112px) clamp(24px, 4vw, 48px);
}

.hero h1 {
  max-width: 16ch;
}

.contour {
  display: block;
  width: 100%;
  height: auto;
  margin-top: clamp(28px, 5vw, 56px);
}

.contour path {
  fill: none;
  stroke: var(--khaki);
  stroke-width: 2;
}

.collage {
  padding-block: clamp(24px, 5vw, 64px) clamp(40px, 7vw, 96px);
}

.section-head {
  margin-bottom: clamp(24px, 4vw, 44px);
}

.collage-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.collage-card {
  --tilt: 0deg;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: 22px 22px 30px;
  border: 2px solid var(--ink);
  background-color: var(--sand);
  color: var(--ink);
  text-decoration: none;
  box-shadow: 8px 8px 0 var(--khaki);
  transform: rotate(var(--tilt));
  transition: transform 260ms ease, box-shadow 260ms ease;
  animation: settle 620ms ease backwards;
}

.collage-card p {
  margin: 0;
  color: var(--ink);
}

.collage-card h3 {
  margin: 0;
}

.collage-card:hover,
.collage-card:focus-visible {
  transform: rotate(0deg) translate(-2px, -4px);
  box-shadow: 12px 12px 0 var(--khaki);
}

.collage-card .card-link {
  padding-bottom: 2px;
  border-bottom: 2px solid var(--olive);
  color: var(--olive);
  font-weight: 700;
}

.collage-card:nth-child(1) {
  --tilt: -1.2deg;
  z-index: 1;
  width: 88%;
}

.collage-card:nth-child(2) {
  --tilt: 0.9deg;
  z-index: 2;
  width: 88%;
  margin-top: -18px;
  margin-left: 12%;
}

.collage-card:nth-child(3) {
  --tilt: -0.6deg;
  z-index: 3;
  width: 92%;
  margin-top: -18px;
}

.collage-card:nth-child(4) {
  --tilt: 1deg;
  z-index: 4;
  width: 88%;
  margin-top: -18px;
  margin-left: 12%;
}

.card-art {
  display: block;
  width: min(100%, 180px);
  height: auto;
  margin-bottom: 4px;
}

.art-line {
  fill: none;
  stroke: var(--ink);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.art-page {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 2;
}

.art-ring {
  fill: var(--olive);
}

.art-sail {
  fill: var(--paper);
  stroke: var(--ink);
  stroke-width: 2;
  stroke-linejoin: round;
}

.art-jib {
  fill: var(--khaki);
  stroke: var(--ink);
  stroke-width: 2;
  stroke-linejoin: round;
}

.art-hull {
  fill: var(--ink);
}

.art-north {
  fill: var(--olive);
}

.art-south {
  fill: var(--khaki);
}

.fill-olive {
  fill: var(--olive);
}

.fill-paper {
  fill: var(--paper);
}

.fill-sand {
  fill: var(--sand);
}

.fill-moss {
  fill: var(--moss);
}

.fill-khaki {
  fill: var(--khaki);
}

.fill-ink {
  fill: var(--ink);
}

@media (min-width: 900px) {
  .collage-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    align-items: start;
  }

  .collage-card {
    width: auto;
    margin: 0;
  }

  .collage-card:nth-child(1) {
    grid-column: 1 / span 6;
    grid-row: 1;
  }

  .collage-card:nth-child(2) {
    grid-column: 6 / span 6;
    grid-row: 1;
    margin-top: 110px;
    margin-left: 0;
  }

  .collage-card:nth-child(3) {
    grid-column: 2 / span 5;
    grid-row: 2;
    margin-top: -150px;
  }

  .collage-card:nth-child(4) {
    grid-column: 8 / span 5;
    grid-row: 2;
    margin-top: -40px;
    margin-left: 0;
  }
}

/* Home: three layers */

.seams {
  padding-block: clamp(40px, 7vw, 88px);
  border-top: 2px solid var(--ink);
}

.strata {
  display: grid;
  gap: 28px;
}

.stratum {
  padding-top: 18px;
  border-top: 4px solid var(--ink);
}

.stratum-2 {
  border-top-color: var(--olive);
}

.stratum-3 {
  border-top-color: var(--khaki);
}

.stratum-label {
  margin: 0 0 6px;
  color: var(--moss);
  font-size: 1rem;
  font-variant: small-caps;
  font-weight: 700;
  letter-spacing: 0.08em;
}

@media (min-width: 900px) {
  .strata {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 40px;
  }
}

/* Dark band */

.band {
  padding-block: clamp(48px, 8vw, 104px);
  background-color: var(--ink);
  color: var(--paper);
}

.band h2,
.band p {
  color: var(--paper);
}

.band .kicker {
  color: var(--khaki);
}

/* Reading order */

.steps li {
  padding-left: 4px;
  margin-bottom: 1em;
}

/* About: principles */

.principles {
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(0, 1fr);
  max-width: none;
  padding-left: 0;
  list-style: none;
}

.principle {
  padding-top: 14px;
  border-top: 2px solid var(--ink);
}

.principle-no {
  margin: 0 0 4px;
  color: var(--olive);
  font-size: 1rem;
  font-variant: small-caps;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.principle h3 {
  margin-bottom: 8px;
}

@media (min-width: 720px) {
  .principles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }
}

@media (min-width: 1100px) {
  .principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Guide */

.toc {
  margin: 0 0 clamp(24px, 4vw, 40px);
  padding-block: 18px;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.toc .kicker {
  margin-bottom: 10px;
}

.toc ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.toc li {
  margin: 0;
}

.toc a {
  font-weight: 700;
}

.cost-list {
  list-style: none;
  padding-left: 0;
}

.cost-list li {
  padding-block: 10px;
  border-top: 1px solid var(--ink);
}

.log-list {
  margin: 0 0 1.5em;
  max-width: var(--measure);
}

.log-list div {
  padding-block: 12px;
  border-top: 1px solid var(--ink);
}

.log-list dt {
  font-weight: 700;
}

.log-list dd {
  margin: 4px 0 0;
}

/* Allocator */

.no-js .interactive {
  display: none;
}

.js .fallback {
  display: none;
}

.split-table {
  width: 100%;
  margin: 0 0 1.5em;
  border-collapse: collapse;
  font-size: 1rem;
}

.split-table caption {
  padding-bottom: 10px;
  color: var(--ink);
  font-weight: 700;
  text-align: left;
}

.split-table th,
.split-table td {
  padding: 12px 8px 12px 0;
  border-bottom: 1px solid var(--ink);
  text-align: left;
  vertical-align: top;
}

.split-table td {
  padding-left: 8px;
  text-align: right;
  white-space: nowrap;
  font-variant-numeric: lining-nums tabular-nums;
  font-weight: 700;
}

.split-table thead th {
  font-size: 0.95rem;
}

.split-table .cover {
  display: block;
  margin-top: 4px;
  color: var(--moss);
  font-size: 0.95rem;
  font-weight: 400;
}

.split-table tfoot th,
.split-table tfoot td {
  border-top: 2px solid var(--ink);
  border-bottom: 0;
  font-weight: 700;
}

.allocator {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.allocator legend {
  margin-bottom: 4px;
  padding: 0;
  font-size: 1.1rem;
  font-weight: 700;
}

.slider-row {
  padding-block: 16px;
  border-top: 1px solid var(--ink);
}

.slider-row:last-of-type {
  border-bottom: 1px solid var(--ink);
}

.slider-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 16px;
}

.slider-head label {
  font-size: 1.1rem;
  font-weight: 700;
}

.slider-value {
  min-width: 3.2ch;
  color: var(--ink);
  font-size: 1.25rem;
  font-weight: 700;
  font-variant-numeric: lining-nums tabular-nums;
  text-align: right;
}

.slider-note {
  margin: 2px 0 8px;
  color: var(--moss);
  font-size: 0.98rem;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  display: block;
  width: 100%;
  height: 30px;
  margin: 0;
  padding: 0;
  background: none;
  cursor: pointer;
  accent-color: var(--olive);
}

input[type="range"]:focus-visible {
  outline: 3px solid var(--olive);
  outline-offset: 4px;
}

input[type="range"]::-webkit-slider-runnable-track {
  box-sizing: border-box;
  height: 12px;
  border: 2px solid var(--ink);
  background: var(--sand);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  box-sizing: border-box;
  width: 26px;
  height: 26px;
  margin-top: -7px;
  border: 3px solid var(--paper);
  border-radius: 50%;
  background: var(--olive);
  box-shadow: 0 0 0 2px var(--ink);
  cursor: pointer;
}

input[type="range"]::-moz-range-track {
  box-sizing: border-box;
  height: 12px;
  border: 2px solid var(--ink);
  background: var(--sand);
}

input[type="range"]::-moz-range-thumb {
  box-sizing: border-box;
  width: 26px;
  height: 26px;
  border: 3px solid var(--paper);
  border-radius: 50%;
  background: var(--olive);
  box-shadow: 0 0 0 2px var(--ink);
  cursor: pointer;
}

.summary {
  margin-top: 28px;
  padding: 20px;
  border: 2px solid var(--ink);
  background-color: var(--paper);
}

.total-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 16px;
  margin: 0 0 14px;
  font-size: 1.2rem;
  font-weight: 700;
}

.total-value {
  font-size: 1.8rem;
  font-variant-numeric: lining-nums tabular-nums;
}

.split-bar {
  display: block;
  width: 100%;
  height: 40px;
  border: 2px solid var(--ink);
  background-color: var(--paper);
}

.status {
  min-height: 3.2em;
  margin: 22px 0 0;
  padding: 14px 18px;
  border-left: 6px solid var(--olive);
  background-color: var(--sand);
  color: var(--ink);
}

/* Contact */

.mail-card {
  max-width: 40em;
  margin-top: 28px;
  padding: 24px;
  border: 2px solid var(--ink);
  background-color: var(--sand);
  box-shadow: 8px 8px 0 var(--khaki);
}

.mail-link {
  display: inline-block;
  max-width: 100%;
  margin-bottom: 14px;
  color: var(--olive);
  font-size: clamp(1.2rem, 1rem + 1.2vw, 2rem);
  font-weight: 700;
  overflow-wrap: anywhere;
  text-decoration-thickness: 2px;
}

/* Footer */

.site-footer {
  padding-block: 48px 56px;
  border-top: 2px solid var(--ink);
  background-color: var(--sand);
}

.footer-brand {
  margin-bottom: 8px;
  font-size: 1.5rem;
  font-weight: 700;
}

.footer-nav {
  margin: 16px 0 20px;
}

.site-footer .nav-list a {
  border-bottom-color: var(--sand);
}

.site-footer .nav-list a:hover {
  border-bottom-color: var(--olive);
}

/* Reduced motion: the collage lies straight and nothing moves */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

  .collage-card,
  .collage-card:hover,
  .collage-card:focus-visible {
    transform: none !important;
  }

  .button:active {
    transform: none;
  }
}