/* ============================================================
   UNDERGROWTH - Chapter 01: Mantodea
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  --bg: #070a06;          /* moss black */
  --surface: #0d120b;     /* raised panels */
  --ink: #ece7d5;         /* bone / cream text */
  --ink-dim: rgba(236, 231, 213, .55);
  --hairline: rgba(236, 231, 213, .14);
  --green: #a4c661;       /* mantis green */
  --amber: #c9884b;       /* antenna amber */

  --font-display: "Fraunces", Georgia, serif;
  --font-mono: "Fragment Mono", ui-monospace, monospace;
  --font-body: "Instrument Sans", system-ui, sans-serif;

  --pad: clamp(1.25rem, 5vw, 5rem);
  --maxw: 1440px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: clamp(1rem, .9rem + .3vw, 1.125rem);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; text-decoration: none; }

::selection { background: var(--green); color: var(--bg); }

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
}

/* ---------- Type helpers ---------- */
.kicker {
  font-family: var(--font-mono);
  font-size: clamp(.6875rem, .62rem + .18vw, .8125rem);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin: 0;
}
.kicker--green { color: var(--green); }

.display {
  font-family: var(--font-display);
  font-weight: 340;
  font-optical-sizing: auto;
  letter-spacing: -.02em;
  line-height: 1.02;
  margin: 0;
  text-wrap: balance;
}
.display--lg { font-size: clamp(2.4rem, 5.4vw, 4.75rem); }
.display--md { font-size: clamp(2rem, 4.4vw, 3.75rem); }

.body {
  max-width: 34em;
  color: var(--ink);
  margin: 0;
}
.body--center { margin-inline: auto; text-align: center; }

em { font-style: italic; }

/* ---------- Film grain ---------- */
.grain {
  position: fixed;
  inset: 0;
  z-index: 9000;
  pointer-events: none;
  opacity: .05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%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");
  background-size: 180px 180px;
}

/* ---------- Reticle cursor ---------- */
.reticle {
  position: fixed;
  top: 0; left: 0;
  width: 44px; height: 44px;
  margin: -22px 0 0 -22px;
  z-index: 8000;
  pointer-events: none;
  opacity: 0;
  transition: opacity .25s var(--ease);
  will-change: transform;
}
.reticle.is-active { opacity: 1; }
.reticle__ring {
  position: absolute;
  inset: 0;
  border: 1px solid var(--green);
  border-radius: 50%;
}
.reticle__ring::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 3px; height: 3px;
  margin: -1.5px 0 0 -1.5px;
  background: var(--green);
  border-radius: 50%;
}
.reticle__tick {
  position: absolute;
  background: var(--green);
}
.reticle__tick--t,
.reticle__tick--b { left: 50%; width: 1px; height: 6px; margin-left: -.5px; }
.reticle__tick--l,
.reticle__tick--r { top: 50%; height: 1px; width: 6px; margin-top: -.5px; }
.reticle__tick--t { top: -9px; }
.reticle__tick--b { bottom: -9px; }
.reticle__tick--l { left: -9px; }
.reticle__tick--r { right: -9px; }

/* ---------- Header ---------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: clamp(1rem, 2vw, 1.5rem) var(--pad);
  border-bottom: 1px solid transparent;
  transition: border-color .4s var(--ease), background-color .4s var(--ease);
}
.header.is-scrolled {
  border-bottom-color: var(--hairline);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: blur(8px);
}
.wordmark {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .22em;
  text-transform: uppercase;
}
.wordmark__dot {
  width: 8px; height: 8px;
  background: var(--green);
  display: inline-block;
  box-shadow: 0 0 10px color-mix(in srgb, var(--green) 60%, transparent);
}
.nav {
  display: flex;
  gap: clamp(1rem, 2.4vw, 2.4rem);
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.nav a {
  color: var(--ink-dim);
  position: relative;
  padding-bottom: 2px;
  transition: color .25s var(--ease);
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after { transform: scaleX(1); }

/* ---------- Pills ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink);
  padding: .7em 1.3em;
  border: 1px solid var(--hairline);
  border-radius: 100px;
  transition: background-color .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
  white-space: nowrap;
}
.pill:hover,
.pill:focus-visible {
  background: var(--green);
  color: var(--bg);
  border-color: var(--green);
}
.pill--lg {
  font-size: .8125rem;
  padding: .95em 1.8em;
  border-color: var(--green);
  color: var(--green);
}
.pill--lg:hover,
.pill--lg:focus-visible { color: var(--bg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  height: 100svh;
  min-height: 560px;
  width: 100%;
  overflow: hidden;
  cursor: none;
}
.hero__media { position: absolute; inset: 0; }
.hero__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0;
  transition: opacity 1.2s var(--ease);
}
.hero__video.is-ready { opacity: 1; }

.hero__vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 50% 42%, transparent 42%, rgba(7, 10, 6, .55) 78%, rgba(7, 10, 6, .92) 100%),
    linear-gradient(to top, var(--bg) 2%, transparent 32%),
    linear-gradient(to bottom, rgba(7, 10, 6, .5) 0%, transparent 22%);
}

.hero__content {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 3;
  padding: 0 var(--pad) clamp(3.5rem, 8vh, 6rem);
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2.5vh, 1.75rem);
  pointer-events: none;
}
.hero__content .pill,
.hero__content a { pointer-events: auto; }

.hero__headline {
  font-family: var(--font-display);
  font-weight: 320;
  font-optical-sizing: auto;
  font-size: clamp(3.5rem, 11vw, 11rem);
  line-height: .92;
  letter-spacing: -.03em;
  margin: 0;
  display: flex;
  flex-direction: column;
}
.hero__headline em {
  font-style: italic;
  color: var(--amber);
}

.hero__hint {
  display: inline-flex;
  align-items: center;
  gap: .8em;
  color: var(--ink-dim);
}
.hero__hint-glyph {
  color: var(--green);
  letter-spacing: 0;
  animation: sway 2.4s var(--ease) infinite;
}
@keyframes sway {
  0%, 100% { transform: translateX(-3px); opacity: .6; }
  50%      { transform: translateX(3px);  opacity: 1; }
}

.hero__scroll {
  position: absolute;
  right: var(--pad);
  bottom: clamp(3.5rem, 8vh, 6rem);
  z-index: 3;
  color: var(--ink-dim);
}

/* ---------- Scrub gauge ---------- */
.gauge {
  position: absolute;
  left: var(--pad);
  right: var(--pad);
  bottom: clamp(1.5rem, 3.5vh, 2.25rem);
  z-index: 4;
}
.gauge__labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--ink-dim);
  margin-bottom: 8px;
}
.gauge__track {
  position: relative;
  height: 1px;
  background: var(--hairline);
}
.gauge__marker {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px; height: 10px;
  margin: -5px 0 0 -5px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 12px color-mix(in srgb, var(--green) 70%, transparent);
  transition: left .05s linear;
}

/* ============================================================
   SECTIONS (shared)
   ============================================================ */
.section {
  position: relative;
  padding: clamp(5rem, 12vh, 10rem) 0;
  border-top: 1px solid var(--hairline);
  overflow: hidden;
}
.section__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
  position: relative;
  z-index: 2;
}

.ghost-num {
  position: absolute;
  top: 50%;
  left: 2vw;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 20vw;
  line-height: 1;
  color: var(--ink);
  opacity: .04;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}
.ghost-num--right { left: auto; right: 2vw; }

/* ---------- 01 - The Order ---------- */
.section--order .kicker--green { margin-bottom: 1.5rem; }
.section--order .display { max-width: 15ch; }
.section--order .body { margin-top: 1.75rem; }

.stats {
  margin-top: clamp(3rem, 6vh, 5rem);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--hairline);
  border-block: 1px solid var(--hairline);
}
.stat {
  background: var(--bg);
  padding: clamp(1.5rem, 3vw, 2.25rem) clamp(1.25rem, 2vw, 1.75rem);
  display: flex;
  flex-direction: column;
  gap: .75rem;
}
.stat__num {
  font-family: var(--font-display);
  font-weight: 350;
  font-size: clamp(2.25rem, 4.5vw, 3.75rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.stat__label {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

/* ---------- 02 - Anatomy ---------- */
.anatomy {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad);
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: start;
}
.anatomy__figure {
  margin: 0;
  position: relative;
  top: clamp(-4rem, -6vh, -2rem);
}
.anatomy__figure img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--hairline);
  filter: saturate(1.05) contrast(1.03);
}
.anatomy__figure figcaption {
  margin-top: .9rem;
  padding-left: .1rem;
}
.anatomy__text {
  padding-top: clamp(0rem, 3vh, 2.5rem);
}
.anatomy__text .display { margin-top: 1.25rem; }
.anatomy__list {
  margin: clamp(2.25rem, 5vh, 3.5rem) 0 0;
  display: flex;
  flex-direction: column;
}
.anatomy__entry {
  padding: 1.6rem 0;
  border-top: 1px solid var(--hairline);
}
.anatomy__entry:last-child { border-bottom: 1px solid var(--hairline); }
.anatomy__entry dt {
  color: var(--green);
  margin-bottom: .7rem;
}
.anatomy__entry dd { margin: 0; max-width: 42ch; }

/* ---------- 03 - Species ---------- */
.section--species { padding-block: clamp(4rem, 9vh, 7rem); }
.section__inner--species { text-align: center; }
.section--species .kicker--green { margin-bottom: clamp(2.5rem, 5vh, 4rem); }
.section--species .body { margin-top: clamp(2.5rem, 5vh, 4rem); }

.marquee {
  display: flex;
  flex-direction: column;
  gap: clamp(.5rem, 1.5vh, 1rem);
  border-block: 1px solid var(--hairline);
  padding-block: clamp(1.5rem, 3.5vh, 2.75rem);
}
.marquee__row {
  display: flex;
  width: max-content;
  white-space: nowrap;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 340;
  font-size: clamp(1.75rem, 4vw, 3.5rem);
  color: var(--ink-dim);
}
.marquee__row--a { animation: scroll-left 42s linear infinite; }
.marquee__row--b { animation: scroll-right 48s linear infinite; }
.marquee__group {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 2.5vw, 2.5rem);
  padding-right: clamp(1.25rem, 2.5vw, 2.5rem);
}
.marquee__group > span { display: inline-block; }
.marquee__sep {
  color: var(--green);
  font-style: normal;
  font-size: .6em;
}
@keyframes scroll-left  { to { transform: translateX(-50%); } }
@keyframes scroll-right { from { transform: translateX(-50%); } to { transform: translateX(0); } }

/* ---------- 04 - Field Notes ---------- */
.section--notes { text-align: center; }
.notes {
  max-width: 62rem;
  margin-inline: auto;
  padding-inline: var(--pad);
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(2rem, 5vh, 3rem);
}
.notes__quote {
  max-width: 28ch;
  border: 0;
  quotes: none;
}
.notes__quote em { color: var(--green); }
.notes .body { max-width: 40ch; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--hairline);
  padding: clamp(2rem, 4vh, 3rem) var(--pad);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  font-size: .8125rem;
}
.footer__left { color: var(--ink-dim); }
.footer__center { text-align: center; }
.footer__right { text-align: right; }

/* ============================================================
   REVEAL ANIMATIONS
   ============================================================ */
.reveal,
.reveal-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  will-change: opacity, transform;
}
.reveal-up.is-in,
.reveal.is-in {
  opacity: 1;
  transform: none;
}
/* Staggered hero reveal (JS toggles .hero-loaded on body) */
.hero__content .reveal { transition-delay: 0s; }
body.hero-loaded .reveal[data-reveal="1"] { transition-delay: .15s; }
body.hero-loaded .reveal[data-reveal="2"] { transition-delay: .35s; }
body.hero-loaded .reveal[data-reveal="3"] { transition-delay: .5s; }
body.hero-loaded .reveal[data-reveal="4"] { transition-delay: .8s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .anatomy {
    grid-template-columns: 1fr;
    gap: clamp(2rem, 6vw, 3rem);
  }
  .anatomy__figure { top: 0; max-width: 30rem; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav { display: none; }
  .header { gap: 1rem; }
  .wordmark { font-size: .75rem; letter-spacing: .12em; gap: .45rem; }
  .pill--header {
    font-size: .6875rem;
    letter-spacing: .06em;
    padding: .55em 1em;
  }
  .hero { cursor: auto; }
  .hero__headline { font-size: clamp(3rem, 15vw, 5.5rem); }
  .footer {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 1.25rem;
  }
  .footer__left,
  .footer__right { text-align: center; }
  .ghost-num { font-size: 34vw; }
}

@media (max-width: 420px) {
  .stats { grid-template-columns: 1fr; }
  .hero__scroll { display: none; }
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hero__video { opacity: 1; transition: none; }
  .marquee__row--a,
  .marquee__row--b { animation: none; }
  .marquee__row--b { transform: translateX(-25%); }
  .hero__hint-glyph { animation: none; }
  .reveal,
  .reveal-up {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .gauge__marker { transition: none; }
}