/* The Open Field — shared stylesheet */

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('/assets/fonts/inter-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'Source Serif 4';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('/assets/fonts/source-serif-4-normal.woff2') format('woff2');
}

@font-face {
  font-family: 'Source Serif 4';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('/assets/fonts/source-serif-4-italic.woff2') format('woff2');
}

:root {
  /* Core */
  --ink:        #10233A;
  --ink-soft:   #2B4058;
  --paper:      #FBF8F1;
  --paper-2:    #F3EDE1;

  /* Accent */
  --wheat:      #C8912E;
  --wheat-deep: #A5741F;

  /* Support */
  --line:       #E2D9C6;
  --shadow:     rgba(16,35,58,0.08);
  --focus:      #2F6DB0;

  --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-sans:  'Inter', -apple-system, 'Segoe UI', system-ui, sans-serif;

  --measure: 68ch;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

img, svg { max-width: 100%; display: block; }

a {
  color: var(--ink);
  text-decoration-color: var(--wheat);
  text-underline-offset: 0.15em;
}
a:hover { color: var(--wheat-deep); text-decoration-color: var(--wheat-deep); }

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  color: var(--ink);
  margin: 0 0 0.6em;
}

h1 {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.01em;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 600;
}

h3 {
  font-size: 1.15rem;
  font-weight: 600;
}

p { margin: 0 0 1.2em; }

.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--wheat-deep);
  margin-bottom: 1em;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.75em 1.25em;
  z-index: 100;
  font-family: var(--font-sans);
  font-weight: 600;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

/* Layout helpers */
.wrap {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.prose {
  max-width: var(--measure);
  margin: 0 auto;
}

section { padding: clamp(3.5rem, 8vw, 6rem) 0; }

.divider {
  border: none;
  border-top: 1px solid var(--line);
  margin: 0;
}

.alt-bg { background: var(--paper-2); }

/* Header / nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(251, 248, 241, 0.92);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

.wordmark {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  text-decoration: none;
  white-space: nowrap;
}
.wordmark .the { font-weight: 400; color: var(--ink-soft); }
.wordmark .open-field { font-weight: 600; color: var(--ink); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  white-space: nowrap;
}
.site-nav a:hover { color: var(--wheat-deep); }

.nav-toggle {
  display: none;
  font-family: var(--font-sans);
  font-weight: 600;
  background: none;
  border: 1.5px solid var(--ink);
  color: var(--ink);
  border-radius: 6px;
  padding: 0.4em 0.8em;
  cursor: pointer;
}

@media (max-width: 720px) {
  .nav-toggle { display: inline-block; }
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 1rem 1.5rem 1.5rem;
    gap: 1rem;
    display: none;
  }
  .site-nav.is-open { display: flex; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  padding: 0.85em 1.6em;
  border-radius: 8px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary:hover { background: var(--ink-soft); color: var(--paper); }

.btn-secondary {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}
.btn-secondary:hover { background: var(--paper-2); color: var(--ink); }

.btn-accent {
  background: var(--wheat);
  color: var(--ink);
}
.btn-accent:hover { background: var(--wheat-deep); color: var(--paper); }

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

/* Hero */
.hero {
  padding-top: clamp(4rem, 10vw, 7rem);
  padding-bottom: clamp(4rem, 10vw, 6rem);
  background: linear-gradient(to bottom, var(--paper) 0%, var(--paper) 70%, #F6E9D2 100%);
}

.hero .prose { max-width: 42ch; }

.hero h1 { font-family: var(--font-sans); }

.hero .subhead {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  color: var(--ink-soft);
  max-width: 60ch;
}

/* Reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* Pillar cards */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 2.5rem;
}

@media (max-width: 720px) {
  .pillars-grid { grid-template-columns: 1fr; }
}

.pillar-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.5rem;
  box-shadow: 0 2px 10px var(--shadow);
}

.pillar-card .pillar-index {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--wheat-deep);
  display: block;
  margin-bottom: 0.4em;
}

.pillar-card p { margin-bottom: 0; font-size: 1rem; }

/* What this is / isn't — distinct treatment */
.honesty-note {
  border-left: 3px solid var(--wheat);
  padding: 0.5rem 0 0.5rem 1.5rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 3rem 0 2.5rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.share-row {
  display: flex;
  gap: 1rem;
  list-style: none;
  padding: 0;
  margin: 0;
}
.share-row a { text-decoration: none; color: var(--ink-soft); }
.share-row a:hover { color: var(--wheat-deep); }

.visit-counter {
  font-size: 0.85rem;
  color: var(--ink-soft);
  opacity: 0.8;
}

.footer-fine {
  font-size: 0.85rem;
  color: var(--ink-soft);
  opacity: 0.85;
}

/* paper.html specifics */
.paper-body {
  font-size: 1.15rem;
  line-height: 1.75;
}
.paper-body .prose { max-width: 72ch; }
.paper-body p { margin-bottom: 1.4em; }

.paper-toc {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.5rem 1.75rem;
}
.paper-toc h2 { font-size: 1.1rem; margin-bottom: 0.75em; }
.paper-toc ol {
  margin: 0;
  padding-left: 1.25em;
  columns: 2;
  column-gap: 2rem;
}
@media (max-width: 640px) {
  .paper-toc ol { columns: 1; }
}
.paper-toc li { break-inside: avoid; margin-bottom: 0.4em; }
.paper-toc a { text-decoration: none; }
.paper-toc a:hover { text-decoration: underline; }

.epigraph {
  font-style: italic;
  color: var(--ink-soft);
  border-left: 3px solid var(--wheat);
  padding-left: 1.25rem;
}

.pillar-heading {
  scroll-margin-top: 5.5rem;
}

.endnotes {
  font-size: 0.95rem;
  padding-left: 1.4em;
}
.endnotes li { margin-bottom: 0.9em; scroll-margin-top: 5.5rem; }
.endnotes h2, .endnotes h3 { scroll-margin-top: 5.5rem; }

sup.fnref a {
  text-decoration: none;
  font-weight: 600;
  color: var(--wheat-deep);
  padding: 0 0.15em;
}

.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.6em 1em;
  border-radius: 999px;
  box-shadow: 0 2px 10px var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.back-to-index {
  font-family: var(--font-sans);
  font-size: 0.95rem;
}