/* FOOM or FOMO — field guide stylesheet
   One page, two habitats meeting at a hairline seam. Cream paper shared;
   FOOM gets the hot upper wash (amber → rose horizon), FOMO the cool one
   (predawn indigo). Dry institutional typography sells the joke. */

:root {
  --paper:    #F7F0E1;
  --ink:      #23201C;
  --ink-soft: #4A463F;

  /* FOOM — hot side */
  --amber: #F0A63C;
  --rose:  #E4735A;

  /* FOMO — cool side */
  --predawn: #3A3358;
  --slate:   #5A6472;

  --seam: 232 32 28;            /* --ink at low opacity, via rgb() with alpha */

  --font-display: "Instrument Serif", "Times New Roman", serif;
  --font-body: "Newsreader", Georgia, "Times New Roman", serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --maxw: 1180px;
  --rule: 1px solid rgba(var(--seam) / 0.18);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.94rem + 0.25vw, 1.12rem);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  z-index: 100;
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

/* ---------- Masthead ---------- */
.masthead {
  padding: clamp(2.5rem, 6vw, 5rem) 1.25rem 1.75rem;
  text-align: center;
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.6rem, 8vw, 5.2rem);
  line-height: 1.02;
  letter-spacing: 0.005em;
  margin: 0;
  color: var(--ink);
}
.wordmark-or {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.62em;
  color: var(--ink-soft);
  margin: 0 0.08em;
  vertical-align: 0.16em;
}

.subtitle {
  font-family: var(--font-body);
  font-style: italic;
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  color: var(--ink-soft);
  margin: 0.7rem 0 0;
  letter-spacing: 0.01em;
}

/* ---------- Self-sort ---------- */
.selfsort {
  margin: 2.1rem auto 0;
  max-width: 30rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
}
.selfsort-q {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.selfsort-buttons { display: inline-flex; gap: 0.5rem; }

.pill {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.06em;
  padding: 0.5rem 1.15rem;
  border: 1px solid rgba(var(--seam) / 0.35);
  border-radius: 2px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}
.pill:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}
.pill-foom:hover, .pill-foom[aria-pressed="true"] {
  background: var(--amber); color: #2a1c06; border-color: var(--amber);
}
.pill-fomo:hover, .pill-fomo[aria-pressed="true"] {
  background: var(--predawn); color: var(--paper); border-color: var(--predawn);
}

/* ---------- Verdict card ---------- */
.verdict {
  margin: 1.6rem auto 0;
  max-width: 30rem;
  border: var(--rule);
  background: var(--paper);
  padding: 1rem 1.15rem 1.1rem;
  text-align: left;
}
.verdict-line { font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.04em; margin: 0 0 0.35rem; color: var(--ink); }
.verdict-line .binomial { font-style: italic; }
.verdict-take { font-family: var(--font-body); font-size: 0.96rem; margin: 0 0 0.55rem; color: var(--ink); }
.verdict-meta { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.03em; color: var(--ink-soft); margin: 0 0 0.8rem; }
.copy-link {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.8rem;
  border: 1px solid rgba(var(--seam) / 0.4);
  background: var(--ink);
  color: var(--paper);
  border-radius: 2px;
  cursor: pointer;
}
.copy-link:focus-visible { outline: 2px solid var(--amber); outline-offset: 2px; }
.copy-status { font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-soft); margin-left: 0.6rem; }

/* ---------- Field / habitats ---------- */
.field { padding: clamp(2rem, 5vw, 3.5rem) 1.25rem 1rem; }

.field-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  align-items: start;
  column-gap: 0;
}

/* The seam: a hairline down the middle */
.seam {
  width: 1px;
  align-self: stretch;
  background: rgba(var(--seam) / 0.28);
}

.habitat {
  padding: 0 1.5rem 1.5rem;
  min-width: 0;                /* allow grid item to shrink */
  position: relative;
  transition: opacity 0.25s ease, filter 0.25s ease;
}

/* Upper wash per habitat — hot on FOOM, cool on FOMO — fading to shared cream */
.habitat-foom {
  background:
    linear-gradient(180deg,
      rgba(240, 166, 60, 0.20) 0%,
      rgba(228, 115, 90, 0.14) 16%,
      rgba(247, 240, 225, 0.00) 42%,
      var(--paper) 60%);
}
.habitat-fomo {
  background:
    linear-gradient(180deg,
      rgba(58, 51, 88, 0.22) 0%,
      rgba(90, 100, 114, 0.12) 18%,
      rgba(247, 240, 225, 0.00) 44%,
      var(--paper) 62%);
}

/* genus headers */
.genus {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.92rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin: 0.4rem 0 0.3rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(var(--seam) / 0.25);
}
.genus-foom { color: #8a3f1a; }
.genus-fomo { color: var(--predawn); }

.genus-note {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.86rem;
  color: var(--ink-soft);
  margin: 0 0 1.2rem;
}

/* ---------- Specimen plates ---------- */
.specimens { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }

.specimen {
  border: var(--rule);
  background: var(--paper);
  padding: 0.9rem 1rem 0.95rem;
  position: relative;
}
.specimen::before {
  content: "PL. " counter(plate) "  ·";
  position: absolute;
  top: -0.7rem;
  left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  background: var(--paper);
  padding: 0 0.3rem;
  color: var(--ink-soft);
}
.specimens { counter-reset: plate; }
.specimen { counter-increment: plate; }

.specimen-binomial {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  margin: 0 0 0.45rem;
  color: var(--ink);
}
.specimens-foom .specimen-binomial { color: #7a360f; }
.specimens-fomo .specimen-binomial { color: var(--predawn); }

.specimen-take {
  font-family: var(--font-body);
  font-size: 0.97rem;
  line-height: 1.5;
  margin: 0 0 0.7rem;
  color: var(--ink);
}

.specimen-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  margin: 0;
  padding: 0;
}
.specimen-tags li { list-style: none; }
.specimen-tags .tag-key { text-transform: uppercase; letter-spacing: 0.1em; opacity: 0.7; }

/* ---------- Thesis panel ---------- */
.thesis { padding: clamp(2.5rem, 6vw, 4.5rem) 1.25rem 1.5rem; }
.thesis-panel {
  max-width: 40rem;
  margin: 0 auto;
  border-top: 1px solid rgba(var(--seam) / 0.3);
  border-bottom: 1px solid rgba(var(--seam) / 0.3);
  padding: 1.6rem 1.25rem;
  text-align: center;
}
.thesis-body {
  font-family: var(--font-body);
  font-size: 1.08rem;
  line-height: 1.65;
  margin: 0 0 0.9rem;
  color: var(--ink);
}
.thesis-link {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.98rem;
  color: var(--ink-soft);
  margin: 0;
}
.thesis-link a {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.84em;
  letter-spacing: 0.05em;
  color: var(--ink);
  border-bottom: 1px solid rgba(var(--seam) / 0.5);
  text-decoration: none;
  margin-left: 0.2em;
}
.thesis-link a:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

/* ---------- Colophon ---------- */
.colophon {
  text-align: center;
  padding: 1.5rem 1.25rem clamp(2.5rem, 6vw, 4rem);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}
.colophon a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(var(--seam) / 0.4);
}
.colophon a:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }
.colophon-dot { opacity: 0.5; }
.colophon-note { margin: 0.6rem 0 0; font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase; opacity: 0.7; }

/* ---------- Emphasis state (self-sort) ----------
   When a genus is chosen, recede the other habitat. */
.habitat { will-change: opacity, filter; }
body.sorted-foom .habitat-fomo { opacity: 0.42; filter: saturate(0.55); }
body.sorted-fomo .habitat-foom { opacity: 0.42; filter: saturate(0.55); }

/* Highlight the archetype specimen on the chosen side */
.specimen.archetype { box-shadow: inset 0 0 0 2px rgba(var(--seam) / 0.55); }

/* Reduced motion: keep things calm */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}

/* ---------- Responsive: stack at ≤700px ---------- */
@media (max-width: 700px) {
  .field-grid {
    grid-template-columns: 1fr;
    row-gap: 0;
  }
  .seam {
    width: auto;
    height: 1px;
    margin: 0.5rem 0 1.5rem;
    background: rgba(var(--seam) / 0.28);
  }
  .habitat { padding: 0 0.4rem 1.75rem; }
  .wordmark { font-size: clamp(2.2rem, 13vw, 3.6rem); }
  .masthead { padding-top: 3rem; }
}

/* Very small screens */
@media (max-width: 360px) {
  .habitat { padding-left: 0; padding-right: 0; }
  .selfsort-buttons { flex-wrap: wrap; justify-content: center; }
  .specimen { padding: 0.8rem 0.75rem; }
}