/* =================================================================
   The Jagged Frontier — "Field Survey" design system
   A cartographic treatment: contour lines, surveyor's marks,
   warm field-notebook paper by day, deep-ink survey by night.
   ================================================================= */

/* --- Palette ------------------------------------------------------ */
:root {
  --c-bg:          #ECE6D8;   /* warm bone paper            */
  --c-surface:     #F5F0E4;   /* lighter card stock         */
  --c-surface-2:   #E4DCC9;   /* sunk panel                 */
  --c-text:        #211F1A;   /* warm ink                   */
  --c-text-muted:  #6A6453;
  --c-text-faint:  #9A917C;
  --c-border:      #D3C8B1;   /* pencil rule                */
  --c-border-firm: #C0B499;
  --c-accent:      #C84A2E;   /* surveyor's vermilion       */
  --c-accent-soft: rgba(200, 74, 46, 0.10);
  --c-pine:        #2E5E54;   /* mapped / verified green    */
  --c-ochre:       #B07A2C;
  --c-contour:     rgba(120, 104, 74, 0.16);
  --c-grain:       0.04;
  --shadow-card:   0 1px 2px rgba(40, 32, 18, 0.05), 0 8px 24px -12px rgba(40, 32, 18, 0.18);
}

.dark {
  --c-bg:          #14171C;   /* deep survey ink            */
  --c-surface:     #1B1F26;
  --c-surface-2:   #23282F;
  --c-text:        #E8E2D2;
  --c-text-muted:  #9AA0A1;
  --c-text-faint:  #6B7178;
  --c-border:      #2C323A;
  --c-border-firm: #3A424C;
  --c-accent:      #E26343;   /* brighter vermilion on dark */
  --c-accent-soft: rgba(226, 99, 67, 0.13);
  --c-pine:        #5FA892;
  --c-ochre:       #D2A24E;
  --c-contour:     rgba(150, 170, 180, 0.10);
  --c-grain:       0.05;
  --shadow-card:   0 1px 2px rgba(0, 0, 0, 0.3), 0 10px 30px -14px rgba(0, 0, 0, 0.6);
}

/* --- Base --------------------------------------------------------- */
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  background-color: var(--c-bg);
  position: relative;
  font-feature-settings: "liga" 1, "kern" 1;
}

/* Paper grain overlay — fixed, faint, behind content */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: var(--c-grain);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
body > * { position: relative; z-index: 1; }

/* --- Selection ---------------------------------------------------- */
::selection { background: var(--c-accent); color: #fff; }

/* --- Scrollbar ---------------------------------------------------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background-color: var(--c-border-firm);
  border-radius: 0;
  border: 3px solid var(--c-bg);
}

/* --- Cartographic eyebrow / labels -------------------------------- */
.survey-label {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-text-faint);
}
.coord {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--c-text-faint);
}

/* --- Reference / source links (Further reading) ------------------- */
.ref-link {
  font-family: "Spectral", Georgia, serif;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--c-text);
  text-decoration: underline;
  text-decoration-color: var(--c-border-firm);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}
.ref-link:hover {
  color: var(--c-accent);
  text-decoration-color: var(--c-accent);
}

/* --- Contour decoration ------------------------------------------- */
.contour-svg { color: var(--c-contour); }
.contour-svg path { fill: none; stroke: currentColor; stroke-width: 1; }

/* hero coastline stroke draw-in */
.coastline-draw {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: draw-line 2.6s cubic-bezier(0.65, 0, 0.35, 1) 0.3s forwards;
}
@keyframes draw-line { to { stroke-dashoffset: 0; } }

/* surveyor's tick row under hero */
.tick-rule {
  height: 14px;
  background-image: repeating-linear-gradient(
    to right,
    var(--c-border-firm) 0, var(--c-border-firm) 1px,
    transparent 1px, transparent 16px
  );
  -webkit-mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
          mask-image: linear-gradient(to right, transparent, #000 8%, #000 92%, transparent);
}

/* --- Staggered page-load reveal ----------------------------------- */
.reveal { opacity: 0; transform: translateY(14px); animation: reveal-up 0.8s cubic-bezier(0.2, 0.7, 0.2, 1) forwards; }
@keyframes reveal-up { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) {
  .reveal, .coastline-draw { animation: none !important; opacity: 1 !important; transform: none !important; stroke-dashoffset: 0 !important; }
}

/* --- Survey / essay cards ----------------------------------------- */
.survey-card {
  position: relative;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  transition: transform 0.35s cubic-bezier(0.2,0.7,0.2,1), box-shadow 0.35s ease, border-color 0.35s ease;
  overflow: hidden;
}
.survey-card::after {           /* corner registration mark */
  content: "";
  position: absolute;
  top: 0.75rem; right: 0.75rem;
  width: 10px; height: 10px;
  border-top: 1px solid var(--c-border-firm);
  border-right: 1px solid var(--c-border-firm);
  opacity: 0.7;
}
.survey-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: var(--c-accent);
}
.survey-card:hover .card-index { color: var(--c-accent); }
.card-index {
  font-family: "Fraunces", serif;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--c-text-faint);
  transition: color 0.35s ease;
}

/* survey pin marker */
.pin {
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px var(--c-accent-soft);
}

/* --- Jagged divider ----------------------------------------------- */
.jagged-rule { color: var(--c-border-firm); }
.jagged-rule path { fill: none; stroke: currentColor; stroke-width: 1.25; }

/* --- Verifier axis (home) ----------------------------------------- */
.axis-track {
  position: relative;
  height: 3px;
  background: linear-gradient(to right, var(--c-pine), var(--c-ochre) 55%, var(--c-accent));
  border-radius: 2px;
}
.axis-node { position: absolute; top: 50%; transform: translate(-50%, -50%); }
.axis-dot {
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--c-surface);
  border: 2px solid var(--c-text-muted);
}
.axis-dot.mapped   { border-color: var(--c-pine);  background: var(--c-pine); }
.axis-dot.contested{ border-color: var(--c-ochre); }
.axis-dot.frontier { border-color: var(--c-accent); background: var(--c-accent); }

/* --- Long-form typography (essays) -------------------------------- */
.essay-prose {
  font-family: "Spectral", Georgia, serif;
  font-size: 1.18rem;
  line-height: 1.72;
  color: var(--c-text);
}
.essay-prose p { margin: 0 0 1.45rem; }
.essay-prose > p:first-of-type { margin-top: 0.5rem; }

/* drop cap on the opening paragraph */
.essay-prose > p:first-of-type::first-letter {
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: 3.45rem;
  line-height: 0.82;
  float: left;
  margin: 0.12em 0.1em 0 0;
  color: var(--c-accent);
}

.essay-prose h2 {
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: 1.85rem;
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 3.2rem 0 1rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--c-border);
  scroll-margin-top: 6rem;
  color: var(--c-text);
}
.essay-prose h2 .h-coord {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 0.5rem;
}
.essay-prose h3 {
  font-family: "Fraunces", serif;
  font-weight: 600;
  font-size: 1.3rem;
  margin: 2.2rem 0 0.75rem;
  scroll-margin-top: 6rem;
  color: var(--c-text);
}
.essay-prose a {
  color: var(--c-text);
  text-decoration: underline;
  text-decoration-color: var(--c-accent);
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
  transition: color 0.2s ease;
}
.essay-prose a:hover { color: var(--c-accent); }
.essay-prose strong { font-weight: 600; color: var(--c-text); }
.essay-prose em { font-style: italic; }

.essay-prose blockquote {
  margin: 2rem 0;
  padding: 0.2rem 0 0.2rem 1.5rem;
  border-left: 2px solid var(--c-accent);
  font-style: italic;
  color: var(--c-text-muted);
}
.essay-prose blockquote p { margin-bottom: 0.6rem; }

.essay-prose ul, .essay-prose ol { margin: 0 0 1.45rem 0; padding-left: 1.4rem; }
.essay-prose li { margin-bottom: 0.55rem; }
.essay-prose ul li::marker { color: var(--c-accent); }
.essay-prose ol li::marker { color: var(--c-text-faint); font-family: "JetBrains Mono", monospace; font-size: 0.85em; }

.essay-prose hr {
  border: 0;
  height: 1px;
  background: var(--c-border);
  margin: 2.6rem 0;
}

.essay-prose code {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.86em;
  background: var(--c-surface-2);
  padding: 0.1em 0.36em;
  border-radius: 3px;
}

/* tables become a field ledger */
.essay-prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  margin: 2rem 0;
  font-family: "Spectral", serif;
}
.essay-prose thead th {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: left;
  color: var(--c-text-muted);
  border-bottom: 1.5px solid var(--c-border-firm);
  padding: 0.5rem 0.8rem;
}
.essay-prose tbody td {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--c-border);
  vertical-align: top;
}
.essay-prose tbody tr:hover { background: var(--c-accent-soft); }

@media (max-width: 768px) {
  .essay-prose { font-size: 1.08rem; }
  .essay-prose table { display: block; overflow-x: auto; }
}

/* --- Pull-quote / field-note components (usable in essays) -------- */
.field-note {
  position: relative;
  margin: 2.2rem 0;
  padding: 1.2rem 1.3rem 1.2rem 1.5rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-left: 3px solid var(--c-pine);
  font-family: "Spectral", serif;
  font-size: 1.02rem;
  line-height: 1.6;
  color: var(--c-text-muted);
}
.field-note .field-note-tag {
  display: block;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.64rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-pine);
  margin-bottom: 0.5rem;
}
.field-note p:last-child { margin-bottom: 0; }

.pull {
  margin: 2.6rem 0;
  font-family: "Fraunces", serif;
  font-weight: 500;
  font-size: 1.6rem;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--c-text);
  padding-left: 1.4rem;
  border-left: 3px solid var(--c-accent);
}

/* --- Inline diagrams ---------------------------------------------- */
.diagram {
  margin: 2.6rem 0;
  padding: 1.5rem 1.5rem 1.2rem;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
}
.diagram svg { width: 100%; height: auto; display: block; }
.diagram .d-stroke   { stroke: var(--c-text-muted); }
.diagram .d-faint    { stroke: var(--c-border-firm); }
.diagram .d-fill     { fill: var(--c-surface-2); }
.diagram .d-accent   { stroke: var(--c-accent); }
.diagram .d-accent-f { fill: var(--c-accent); }
.diagram .d-fill-mute{ fill: var(--c-text-muted); }
.diagram .d-label    { fill: var(--c-text-muted); font-family: "JetBrains Mono", monospace; font-size: 13px; letter-spacing: 0.02em; }
.diagram .d-cap      { fill: var(--c-text-faint); font-family: "JetBrains Mono", monospace; font-size: 11px; letter-spacing: 0.04em; }
.diagram .d-title    { fill: var(--c-text); font-family: "Fraunces", serif; font-weight: 600; font-size: 15px; }
.diagram figcaption {
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--c-border);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  line-height: 1.5;
  color: var(--c-text-faint);
  text-transform: uppercase;
}

/* --- TOC sidebar -------------------------------------------------- */
.toc-sidebar { position: sticky; top: 6rem; max-height: calc(100vh - 8rem); overflow-y: auto; }
.toc-sidebar::-webkit-scrollbar { width: 3px; }
.toc-link {
  display: block;
  padding: 0.26rem 0 0.26rem 0.85rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  line-height: 1.4;
  color: var(--c-text-faint);
  border-left: 1.5px solid var(--c-border);
  transition: all 0.2s ease;
  text-decoration: none;
}
.toc-link:hover { color: var(--c-text-muted); border-left-color: var(--c-border-firm); }
.toc-link.active { color: var(--c-accent); border-left-color: var(--c-accent); }
.toc-link.toc-h3 { padding-left: 1.7rem; font-size: 0.68rem; }

/* --- Navbar ------------------------------------------------------- */
.navbar-blur { background: color-mix(in srgb, var(--c-bg) 82%, transparent); backdrop-filter: blur(10px); }

/* --- Footer link underline ---------------------------------------- */
.foot-link { transition: color 0.2s ease; }
.foot-link:hover { color: var(--c-accent); }

/* --- Print -------------------------------------------------------- */
@media print {
  body::before, .toc-sidebar, .navbar, .mobile-menu, footer, .dark-toggle, .contour-svg { display: none !important; }
  .essay-prose { color: #000 !important; font-size: 11pt; }
}