/* Survival of Fitness
   EDIT: Site-wide colors, typography, and spacing are defined here. */

:root {
  --paper: #f6f1e8;
  --paper-soft: #fbf8f1;
  --ink: #151411;
  --muted: #625d54;
  --faint: #8c8375;
  --rule: #d4c8b7;
  --rule-strong: #978b7b;
  --accent: #6f2632;
  --max-width: 1120px;
  --gutter: 28px;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100svh;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(251, 248, 241, 0.92), rgba(246, 241, 232, 0.98)),
    var(--paper);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.64;
  text-rendering: optimizeLegibility;
}

body,
button,
input,
textarea {
  letter-spacing: 0;
}

a {
  color: inherit;
}

button {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 10;
  padding: 10px 14px;
  color: var(--paper-soft);
  background: var(--ink);
  transform: translateY(-140%);
  transition: transform 160ms ease;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 64px;
  padding: 16px var(--gutter);
  background: rgba(246, 241, 232, 0.9);
  backdrop-filter: blur(14px);
}

.wordmark,
.contact-link,
.panel-tab,
.button,
.movement-label,
.quiet-note,
.site-footer {
  font-family: var(--sans);
}

.wordmark,
.contact-link {
  font-size: 0.76rem;
  font-weight: 780;
  text-decoration: none;
  text-transform: uppercase;
  text-underline-offset: 6px;
}

.contact-link {
  color: var(--muted);
}

.wordmark:hover,
.wordmark:focus-visible,
.contact-link:hover,
.contact-link:focus-visible {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

.frontispiece {
  min-height: calc(100svh - 112px);
}

.frontispiece-inner {
  display: flex;
  min-height: calc(100svh - 112px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 82px 0 58px;
  text-align: center;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 500;
}

h1 {
  max-width: 1040px;
  margin-bottom: 42px;
  font-size: 7rem;
  line-height: 0.95;
}

.intro {
  max-width: 740px;
  margin: 0 auto 52px;
  padding-top: 34px;
  border-top: 1px solid var(--ink);
  color: var(--muted);
  font-family: var(--serif);
  font-size: 1.48rem;
  line-height: 1.42;
}

.panel-tabs {
  display: grid;
  width: min(100%, 880px);
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.panel-tab {
  display: flex;
  min-height: 118px;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 18px;
  border: 1px solid var(--rule-strong);
  color: var(--ink);
  background: transparent;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 780;
  line-height: 1.2;
  text-align: left;
  text-transform: uppercase;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    color 160ms ease;
}

.panel-tab:hover,
.panel-tab:focus-visible,
.panel-tab.is-active {
  border-color: var(--ink);
  background: rgba(21, 20, 17, 0.035);
}

.panel-tab:focus-visible,
.button:focus-visible,
.featured-work-link:focus-visible,
.wordmark:focus-visible,
.contact-link:focus-visible {
  outline: 1px solid var(--ink);
  outline-offset: 4px;
}

.panel-tab.is-active {
  color: var(--accent);
}

.panel-area {
  width: min(100%, 880px);
  margin-top: 22px;
}

.content-panel {
  padding: 42px;
  border: 1px solid var(--rule-strong);
  background: rgba(251, 248, 241, 0.54);
  text-align: left;
}

.content-panel[hidden] {
  display: none;
}

.content-panel h2 {
  max-width: 720px;
  margin-bottom: 22px;
  font-size: 2.35rem;
  line-height: 1.08;
}

.content-panel h3 {
  margin-bottom: 8px;
  font-size: 1.22rem;
  line-height: 1.2;
}

.content-panel p {
  max-width: 720px;
  margin-bottom: 18px;
  color: var(--muted);
}

.content-panel p:last-child {
  margin-bottom: 0;
}

.panel-opening {
  color: var(--ink) !important;
  font-family: var(--serif);
  font-size: 1.38rem;
  line-height: 1.34;
}

.movements,
.work-list {
  margin-top: 34px;
  border-top: 1px solid var(--rule-strong);
}

.movements article,
.work-list article {
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
}

.movement-label,
.quiet-note {
  margin-bottom: 8px !important;
  color: var(--accent) !important;
  font-size: 0.72rem;
  font-weight: 780;
  line-height: 1.2;
  text-transform: uppercase;
}

.work-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.work-list article {
  padding-right: 22px;
}

.work-list article + article {
  padding-left: 22px;
  border-left: 1px solid var(--rule);
}

.featured-work {
  margin-top: 34px;
  border-top: 1px solid var(--rule-strong);
  border-bottom: 1px solid var(--rule);
}

.featured-work-link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 28px;
  align-items: center;
  padding: 28px 0;
  text-decoration: none;
}

.featured-work-copy {
  display: block;
}

.featured-work .movement-label,
.featured-work-title,
.featured-work-summary,
.featured-work-cta {
  display: block;
}

.featured-work-title {
  max-width: 620px;
  margin-bottom: 10px;
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 500;
  line-height: 1.12;
}

.featured-work-summary {
  max-width: 690px;
  margin-bottom: 18px;
  color: var(--muted);
}

.featured-work-cta {
  color: var(--ink);
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 780;
  line-height: 1.2;
  text-transform: uppercase;
  text-underline-offset: 5px;
}

.featured-work-link:hover .featured-work-cta,
.featured-work-link:focus-visible .featured-work-cta {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

.featured-work-motif {
  width: min(100%, 260px);
  justify-self: end;
  overflow: visible;
}

.featured-work-motif path,
.featured-work-motif ellipse {
  fill: none;
  stroke: var(--rule-strong);
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.featured-work-motif ellipse {
  stroke: var(--rule);
  stroke-dasharray: 2 5;
}

.featured-work-motif circle {
  fill: var(--ink);
  opacity: 0.78;
}

.featured-work-link:hover .featured-work-motif path,
.featured-work-link:focus-visible .featured-work-motif path {
  stroke: var(--ink);
}

.quiet-note {
  margin-top: 24px;
}

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

.button {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  padding: 12px 16px;
  border: 1px solid var(--ink);
  color: var(--paper-soft);
  background: var(--ink);
  font-size: 0.74rem;
  font-weight: 780;
  line-height: 1.2;
  text-decoration: none;
  text-transform: uppercase;
  transition:
    color 160ms ease,
    background 160ms ease,
    border-color 160ms ease;
}

.button:hover,
.button:focus-visible {
  color: var(--paper-soft);
  background: var(--accent);
  border-color: var(--accent);
}

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

.site-footer {
  padding: 0 var(--gutter) 24px;
  color: var(--faint);
  font-size: 0.8rem;
}

.footer-inner {
  width: min(100%, var(--max-width));
  margin-inline: auto;
  text-align: center;
}

.footer-inner p {
  margin-bottom: 0;
}

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

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

@media (max-width: 980px) {
  h1 {
    font-size: 5.3rem;
  }

  .intro {
    font-size: 1.28rem;
  }

  .work-list {
    grid-template-columns: 1fr;
  }

  .work-list article {
    padding-right: 0;
  }

  .work-list article + article {
    padding-left: 0;
    border-left: 0;
  }

  .featured-work-link {
    grid-template-columns: 1fr;
  }

  .featured-work-motif {
    justify-self: start;
  }
}

@media (max-width: 720px) {
  :root {
    --gutter: 20px;
  }

  body {
    font-size: 16px;
  }

  .site-header {
    min-height: 58px;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .frontispiece,
  .frontispiece-inner {
    min-height: auto;
  }

  .frontispiece-inner {
    padding: 68px 0 48px;
  }

  h1 {
    margin-bottom: 30px;
    font-size: 3.7rem;
  }

  .intro {
    margin-bottom: 38px;
    padding-top: 26px;
    font-size: 1.12rem;
  }

  .panel-tabs {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .panel-tab {
    min-height: 70px;
    align-items: center;
  }

  .content-panel {
    padding: 28px;
  }

  .content-panel h2 {
    font-size: 2rem;
  }

  .panel-opening {
    font-size: 1.18rem;
  }

  .panel-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }
}

@media (max-width: 430px) {
  .wordmark,
  .contact-link {
    font-size: 0.68rem;
  }

  h1 {
    font-size: 3rem;
  }

  .intro {
    font-size: 1.02rem;
  }

  .content-panel {
    padding: 22px;
  }
}