*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --gold: #c9a84c;
  --gold-light: #ead37b;
  --gold-pale: #f2e3ac;
  --gold-dim: #806a31;
  --crop: #91a85c;
  --crop-bright: #cbd878;
  --infrared: #d071ab;
  --radar: #78c8c3;
  --radar-deep: #2c686b;
  --rust: #d26c3d;
  --bg: #080a08;
  --bg-deep: #060806;
  --bg-dark: #0c0f0c;
  --bg-mid: #121812;
  --panel: #161b15;
  --panel-2: #1b221a;
  --text: #d8d5cc;
  --text-light: #f3efe5;
  --muted: #a5a097;
  --border: rgba(201,168,76,.18);
  --border-strong: rgba(201,168,76,.42);
  --radar-border: rgba(120,200,195,.32);
  --shadow: 0 18px 55px rgba(0,0,0,.62);
  --radius: 6px;
}

html { scroll-behavior: smooth; }
body {
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: "EB Garamond", Georgia, serif;
  font-size: 18px;
  line-height: 1.72;
}
a { color: inherit; }
button, input { font: inherit; }
button { color: inherit; }
img, svg { max-width: 100%; }
::selection { background: rgba(120,200,195,.28); color: #fff; }
::-webkit-scrollbar { width: 9px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: #517c73; border-radius: 5px; }

.skip-link {
  position: fixed;
  left: -9999px;
  top: 12px;
  z-index: 9999;
  padding: .6rem .85rem;
  border-radius: 4px;
  background: var(--gold);
  color: #0b0b08;
  font-family: Inter,sans-serif;
  font-weight: 700;
}
.skip-link:focus { left: 12px; }

.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0,.82fr) minmax(540px,1.18fr);
  align-items: center;
  gap: 3.5rem;
  overflow: hidden;
  isolation: isolate;
  padding: 6rem max(4vw,2rem);
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at 82% 25%,rgba(120,200,195,.10),transparent 28%),
    radial-gradient(circle at 25% 38%,rgba(201,168,76,.08),transparent 32%),
    linear-gradient(130deg,#111810 0%,#090c09 53%,#060806 100%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(90deg,rgba(7,9,7,.08),transparent 58%,rgba(7,9,7,.2)),
    linear-gradient(180deg,transparent 68%,var(--bg));
}
.hero-grid {
  position: absolute;
  inset: 0;
  z-index: -3;
  opacity: .17;
  background-image:
    linear-gradient(rgba(120,200,195,.1) 1px,transparent 1px),
    linear-gradient(90deg,rgba(201,168,76,.08) 1px,transparent 1px);
  background-size: 66px 66px;
  mask-image: radial-gradient(circle at 75% 45%,#000 0 44%,transparent 78%);
}
.hero-glow {
  position: absolute;
  z-index: -2;
  border-radius: 50%;
  filter: blur(70px);
  opacity: .15;
}
.glow-one { width: 520px; height: 160px; right: 13%; bottom: 16%; background: var(--radar); transform: rotate(-7deg); }
.glow-two { width: 420px; height: 120px; right: 4%; top: 20%; background: var(--gold); transform: rotate(11deg); }

.hero-copy { position: relative; z-index: 2; max-width: 720px; }
.series-link {
  display: inline-block;
  margin-bottom: .9rem;
  color: var(--radar);
  font-family: Inter,sans-serif;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .035em;
  text-decoration: none;
}
.series-link:hover { text-decoration: underline; }

.eyebrow, .section-label, .mini-kicker, .case-location, .research-type {
  color: var(--gold);
  font-family: Cinzel,serif;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .23em;
  text-transform: uppercase;
}
.hero h1 {
  max-width: 760px;
  margin: .4rem 0 .55rem;
  color: var(--text-light);
  font-family: Cinzel,serif;
  font-size: clamp(3.45rem,6.2vw,6.4rem);
  line-height: 1.02;
  text-shadow: 0 7px 42px rgba(0,0,0,.72);
}
.hero-subtitle {
  max-width: 650px;
  color: var(--gold-light);
  font-family: Cinzel,serif;
  font-size: clamp(1.02rem,1.8vw,1.42rem);
  line-height: 1.45;
  letter-spacing: .035em;
}
.hero-guide {
  max-width: 620px;
  margin-top: 1rem;
  color: #c4c0b7;
  font-family: Inter,sans-serif;
  font-size: .8rem;
  line-height: 1.58;
}
.hero blockquote {
  max-width: 650px;
  margin: 1.7rem 0 2rem;
  padding-left: 1.3rem;
  border-left: 2px solid var(--radar-deep);
  color: #cbc7bd;
  font-size: 1.05rem;
  font-style: italic;
  line-height: 1.78;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: .76rem 1.3rem;
  border-radius: 3px;
  font-family: Cinzel,serif;
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .085em;
  text-decoration: none;
  text-transform: uppercase;
  transition: transform .2s,box-shadow .2s,background .2s;
}
.button.primary {
  border: 1px solid var(--gold-light);
  background: linear-gradient(135deg,var(--gold-light),var(--gold));
  color: #171309;
}
.button.secondary {
  border: 1px solid var(--radar-border);
  background: rgba(13,16,13,.7);
  color: #9fe1dc;
}
.button:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0,0,0,.4); }

.hero-visual {
  position: relative;
  width: 100%;
  max-width: 900px;
  min-height: 590px;
  overflow: hidden;
  border: 1px solid rgba(120,200,195,.36);
  border-radius: var(--radius);
  background: #111;
  box-shadow: var(--shadow);
}
.hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 90px rgba(0,0,0,.53);
}
.hero-visual svg { display: block; width: 100%; height: 100%; min-height: 590px; }
.visual-caption {
  position: absolute;
  z-index: 5;
  right: .8rem;
  bottom: .6rem;
  left: .8rem;
  color: rgba(232,229,219,.63);
  font-family: Inter,sans-serif;
  font-size: .63rem;
  text-align: center;
  pointer-events: none;
}

.section-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  overflow-x: auto;
  border-bottom: 1px solid var(--border);
  background: rgba(10,13,10,.97);
  backdrop-filter: blur(10px);
}
.section-nav a {
  flex: 0 0 auto;
  padding: .88rem 1rem;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  font-family: Cinzel,serif;
  font-size: .59rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-decoration: none;
  text-transform: uppercase;
  white-space: nowrap;
}
.section-nav a:hover,.section-nav a.active { color: var(--radar); border-bottom-color: var(--radar); }

main { max-width: 1180px; margin: 0 auto; padding: 0 2rem; }
section { scroll-margin-top: 64px; }
.section-alt {
  margin: 0 -2rem;
  padding: 0 2rem 4rem;
  background:
    radial-gradient(circle at 92% 25%,rgba(120,200,195,.045),transparent 32%),
    linear-gradient(180deg,var(--bg),var(--bg-mid) 50%,var(--bg));
}
.section-header { padding: 5rem 0 2.5rem; text-align: center; }
.section-title {
  max-width: 950px;
  margin: .65rem auto .8rem;
  color: var(--text-light);
  font-family: Cinzel,serif;
  font-size: clamp(1.75rem,3.6vw,2.85rem);
  line-height: 1.24;
}
.section-rule {
  width: 86px;
  height: 1px;
  margin: 1rem auto;
  background: linear-gradient(90deg,transparent,var(--radar),var(--gold),transparent);
}
.section-intro { max-width: 820px; margin: 0 auto; color: var(--muted); font-size: 1rem; line-height: 1.82; }
.section-intro sup a { color: var(--gold-light); text-decoration: none; }
.divider { height: 1px; background: linear-gradient(90deg,transparent,var(--border-strong),var(--radar-border),transparent); }

.three-signals {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 1rem;
  margin-bottom: 1.4rem;
}
.three-signals article {
  min-height: 280px;
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 12px 35px rgba(0,0,0,.28);
}
.signal-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  margin-bottom: 1rem;
  border: 1px solid;
  border-radius: 50%;
  font-size: 1.5rem;
}
.surface-icon { border-color: var(--gold-dim); color: var(--gold); }
.crop-icon { border-color: rgba(145,168,92,.52); color: var(--crop-bright); }
.radar-icon { border-color: var(--radar-border); color: var(--radar); }
.three-signals h3 { margin: .25rem 0 .5rem; color: var(--text-light); font-family: Cinzel,serif; font-size: 1.03rem; }
.three-signals p:not(.mini-kicker) { color: var(--muted); font-size: .91rem; }
.signal-status {
  display: block;
  margin-top: 1rem;
  padding-top: .75rem;
  border-top: 1px solid var(--border);
  color: #cbc6b9;
  font-family: Inter,sans-serif;
  font-size: .7rem;
}
.central-principle {
  max-width: 920px;
  margin: 1.5rem auto 4.5rem;
  padding: 1.65rem 1.9rem;
  border: 1px solid var(--radar-border);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 90% 25%,rgba(120,200,195,.1),transparent 30%),
    linear-gradient(135deg,rgba(201,168,76,.055),rgba(13,16,13,.95));
}
.central-principle h3 { margin: .35rem 0 .65rem; color: var(--text-light); font-family: Cinzel,serif; font-size: 1.2rem; }
.central-principle p:last-child { color: var(--muted); }

.season-sequence {
  display: grid;
  grid-template-columns: repeat(4,1fr);
  gap: .8rem;
  margin-bottom: 1.5rem;
}
.season-card {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}
.season-card.key-season { border-color: rgba(203,216,120,.46); box-shadow: 0 0 0 1px rgba(203,216,120,.12),0 14px 40px rgba(0,0,0,.35); }
.season-image {
  position: relative;
  height: 200px;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.season-image::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(100deg,transparent 0 16px,rgba(255,255,220,.12) 16px 18px),
    linear-gradient(#77805f,#3d4b31);
}
.season-image.bare::before {
  background:
    repeating-linear-gradient(165deg,transparent 0 18px,rgba(28,25,21,.55) 18px 21px),
    linear-gradient(#685644,#382f28);
}
.season-image.young::before {
  background:
    repeating-linear-gradient(100deg,transparent 0 15px,rgba(225,236,170,.15) 15px 18px),
    linear-gradient(#93a15e,#4d6238);
}
.season-image.dry::before {
  background:
    repeating-linear-gradient(100deg,transparent 0 15px,rgba(255,245,174,.17) 15px 18px),
    linear-gradient(#b7ad59,#6f7136);
}
.season-image.rain::before {
  background:
    repeating-linear-gradient(100deg,transparent 0 15px,rgba(225,236,170,.13) 15px 18px),
    linear-gradient(#75925a,#3e653c);
}
.road-shadow {
  position: absolute;
  top: -20%;
  left: 39%;
  width: 24%;
  height: 145%;
  transform: rotate(18deg);
  border-radius: 44%;
  background: rgba(211,187,91,.13);
}
.bare .road-shadow { background: rgba(25,22,19,.08); }
.young .road-shadow { background: rgba(205,196,101,.13); }
.dry .road-shadow { background: rgba(220,194,92,.72); box-shadow: 0 0 28px rgba(219,193,91,.45); }
.rain .road-shadow { background: rgba(104,126,74,.12); }
.ditch-mark {
  position: absolute;
  top: -20%;
  width: 6%;
  height: 145%;
  transform: rotate(18deg);
  border-radius: 44%;
  background: rgba(76,132,66,.78);
}
.ditch-left { left: 31%; }
.ditch-right { left: 65%; }
.season-card > p,.season-card > h3 { padding-right: 1rem; padding-left: 1rem; }
.season-number { margin-top: .9rem; color: var(--gold-dim); font-family: Cinzel,serif; font-size: .7rem; }
.season-card h3 { color: var(--text-light); font-family: Cinzel,serif; font-size: .82rem; }
.season-card > p:last-child { min-height: 86px; padding-bottom: 1rem; color: var(--muted); font-size: .84rem; }

.plain-language-note {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 1rem;
  align-items: center;
  max-width: 980px;
  margin: 1.5rem auto 4.5rem;
  padding: 1.35rem 1.55rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: rgba(201,168,76,.045);
}
.note-symbol { color: var(--crop-bright); font-size: 2rem; text-align: center; }
.plain-language-note h3 { color: var(--gold-light); font-family: Cinzel,serif; font-size: .82rem; }
.plain-language-note p { margin-top: .35rem; color: var(--muted); }

.spectral-shell,.gpr-shell { max-width: 1080px; margin: 0 auto 1.5rem; }
.viewer-controls,.gpr-controls { display: flex; flex-wrap: wrap; gap: .45rem; margin-bottom: .7rem; }
.spectral-button,.gpr-button {
  padding: .58rem .85rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--panel);
  color: var(--muted);
  cursor: pointer;
  font-family: Cinzel,serif;
  font-size: .61rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.spectral-button:hover,.spectral-button.active {
  border-color: var(--infrared);
  background: rgba(208,113,171,.15);
  color: #f0c7e2;
}
.gpr-button:hover,.gpr-button.active {
  border-color: var(--radar);
  background: rgba(120,200,195,.13);
  color: #a8e6e2;
}
.spectral-viewer,.gpr-viewer {
  position: relative;
  min-height: 545px;
  overflow: hidden;
  border: 1px solid var(--radar-border);
  border-radius: var(--radius);
  background: #10130f;
  box-shadow: var(--shadow);
}
.spectral-viewer svg,.gpr-viewer svg { display: block; width: 100%; height: 545px; }
.spectral-rgb,.spectral-nir,.spectral-ndvi { transition: opacity .4s ease; }
.spectral-viewer[data-view="rgb"] .spectral-rgb { opacity: 1; }
.spectral-viewer[data-view="rgb"] .spectral-nir,.spectral-viewer[data-view="rgb"] .spectral-ndvi { opacity: 0; }
.spectral-viewer[data-view="nir"] .spectral-nir { opacity: 1; }
.spectral-viewer[data-view="nir"] .spectral-rgb,.spectral-viewer[data-view="nir"] .spectral-ndvi { opacity: 0; }
.spectral-viewer[data-view="ndvi"] .spectral-ndvi { opacity: 1; }
.spectral-viewer[data-view="ndvi"] .spectral-rgb,.spectral-viewer[data-view="ndvi"] .spectral-nir { opacity: 0; }

.viewer-readout {
  position: absolute;
  z-index: 4;
  top: 1rem;
  left: 1rem;
  max-width: 390px;
  padding: .85rem 1rem;
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  background: rgba(8,10,8,.82);
  backdrop-filter: blur(8px);
}
.viewer-title { color: var(--gold-light); font-family: Cinzel,serif; font-size: .77rem; font-weight: 700; letter-spacing: .055em; }
.viewer-description { margin-top: .3rem; color: #d1cec4; font-size: .84rem; line-height: 1.52; }

.spectral-explanation {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: .8rem;
  margin: 1rem 0 1.5rem;
}
.spectral-explanation article {
  padding: 1rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}
.spectral-explanation span { color: var(--infrared); font-family: Cinzel,serif; font-size: .64rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.spectral-explanation p { margin-top: .35rem; color: var(--muted); font-size: .86rem; }

.technical-detail {
  max-width: 920px;
  margin: 1.3rem auto 4.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}
.technical-detail summary {
  padding: .9rem 1rem;
  color: var(--gold-light);
  cursor: pointer;
  font-family: Cinzel,serif;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
}
.technical-detail > div { padding: 0 1rem 1rem; }
.technical-detail p { color: var(--muted); font-size: .88rem; }
.technical-detail code {
  display: block;
  margin-top: .8rem;
  padding: .8rem;
  border: 1px solid rgba(208,113,171,.22);
  border-radius: 3px;
  background: #0d100d;
  color: #f0c7e2;
  font-family: monospace;
  font-size: .83rem;
}

.gpr-viewer .road-shallow,.gpr-viewer .road-rural,.gpr-viewer .road-deep,
.gpr-viewer .response-shallow,.gpr-viewer .response-rural,.gpr-viewer .response-deep,
.gpr-viewer .beam-shallow,.gpr-viewer .beam-rural,.gpr-viewer .beam-deep { transition: opacity .35s ease; }

.gpr-viewer[data-mode="shallow"] .road-shallow,.gpr-viewer[data-mode="shallow"] .response-shallow,.gpr-viewer[data-mode="shallow"] .beam-shallow { opacity: 1; }
.gpr-viewer[data-mode="shallow"] .road-rural,.gpr-viewer[data-mode="shallow"] .road-deep,.gpr-viewer[data-mode="shallow"] .response-rural,.gpr-viewer[data-mode="shallow"] .response-deep,.gpr-viewer[data-mode="shallow"] .beam-rural,.gpr-viewer[data-mode="shallow"] .beam-deep { opacity: .08; }

.gpr-viewer[data-mode="rural"] .road-rural,.gpr-viewer[data-mode="rural"] .response-rural,.gpr-viewer[data-mode="rural"] .beam-rural { opacity: 1; }
.gpr-viewer[data-mode="rural"] .road-shallow,.gpr-viewer[data-mode="rural"] .road-deep,.gpr-viewer[data-mode="rural"] .response-shallow,.gpr-viewer[data-mode="rural"] .response-deep,.gpr-viewer[data-mode="rural"] .beam-shallow,.gpr-viewer[data-mode="rural"] .beam-deep { opacity: .08; }

.gpr-viewer[data-mode="deep"] .road-deep,.gpr-viewer[data-mode="deep"] .response-deep,.gpr-viewer[data-mode="deep"] .beam-deep { opacity: 1; }
.gpr-viewer[data-mode="deep"] .road-shallow,.gpr-viewer[data-mode="deep"] .road-rural,.gpr-viewer[data-mode="deep"] .response-shallow,.gpr-viewer[data-mode="deep"] .response-rural,.gpr-viewer[data-mode="deep"] .beam-shallow,.gpr-viewer[data-mode="deep"] .beam-rural { opacity: .08; }

.gpr-readout { border-color: var(--radar-border); }
.gpr-readout .viewer-title { color: #a5e0dc; }

.frequency-principle {
  max-width: 1000px;
  margin: 1.3rem auto 4.5rem;
  padding: 1.4rem 1.5rem;
  border: 1px solid var(--radar-border);
  border-radius: var(--radius);
  background: var(--panel);
}
.frequency-arrow { display: grid; grid-template-columns: auto 1fr auto; gap: .8rem; align-items: center; color: var(--radar); font-family: Cinzel,serif; font-size: .61rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; }
.frequency-arrow div { position: relative; height: 2px; background: linear-gradient(90deg,var(--infrared),var(--gold),var(--radar)); }
.frequency-arrow div::after { content: ""; position: absolute; right: 0; top: -4px; border-left: 8px solid var(--radar); border-top: 5px solid transparent; border-bottom: 5px solid transparent; }
.frequency-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: .7rem; margin-top: 1rem; }
.frequency-grid article { padding: .8rem; border: 1px solid var(--border); background: rgba(8,10,8,.35); }
.frequency-grid h3 { color: var(--text-light); font-family: Cinzel,serif; font-size: .72rem; }
.frequency-grid p { margin-top: .3rem; color: var(--muted); font-size: .83rem; }
.caution { margin-top: .9rem; color: #c8c3b8; font-size: .83rem; font-style: italic; }

.case-grid { display: grid; gap: 1.15rem; margin-bottom: 4.5rem; }
.case-card {
  display: grid;
  grid-template-columns: minmax(350px,.88fr) minmax(0,1.12fr);
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 12px 36px rgba(0,0,0,.28);
}
.case-visual {
  position: relative;
  min-height: 355px;
  overflow: hidden;
  border-right: 1px solid var(--border);
  background: #151a15;
}
.case-copy { display: flex; flex-direction: column; justify-content: center; padding: 1.8rem 2rem; }
.case-copy h3 { margin: .35rem 0 .65rem; color: var(--text-light); font-family: Cinzel,serif; font-size: 1.2rem; line-height: 1.38; }
.case-copy > p:not(.case-location) { color: var(--muted); font-size: .93rem; }
.case-copy sup a { color: var(--gold-light); text-decoration: none; }
.lesson {
  margin-top: 1.1rem;
  padding: .9rem 1rem;
  border-left: 2px solid var(--radar-deep);
  background: rgba(120,200,195,.045);
}
.lesson span { display: block; color: var(--radar); font-family: Cinzel,serif; font-size: .58rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.lesson strong { display: block; margin-top: .25rem; color: #d8d4c8; font-size: .92rem; }

.camp-hill { background: linear-gradient(135deg,#56634f,#253329); }
.case-layer {
  position: absolute;
  top: 1rem;
  padding: .35rem .55rem;
  border: 1px solid;
  border-radius: 2px;
  background: rgba(8,10,8,.72);
  font-family: Cinzel,serif;
  font-size: .55rem;
  letter-spacing: .09em;
  text-transform: uppercase;
}
.lidar-layer { left: 1rem; color: var(--gold-light); border-color: var(--gold-dim); }
.spectral-layer { right: 1rem; color: #f0c5df; border-color: rgba(208,113,171,.5); }
.case-road {
  position: absolute;
  left: 9%;
  bottom: -12%;
  width: 23%;
  height: 145%;
  transform: rotate(35deg);
  border-radius: 45%;
  background: rgba(219,193,98,.75);
  box-shadow: 0 0 26px rgba(201,168,76,.38);
}
.case-hidden-sites {
  position: absolute;
  right: 7%;
  bottom: 8%;
  width: 53%;
  height: 55%;
  opacity: .78;
  background:
    radial-gradient(circle at 20% 35%,#d56eaa 0 8px,transparent 9px),
    radial-gradient(circle at 63% 22%,#d56eaa 0 11px,transparent 12px),
    radial-gradient(circle at 78% 69%,#d56eaa 0 8px,transparent 9px),
    linear-gradient(27deg,transparent 47%,rgba(235,177,216,.75) 48% 50%,transparent 51%),
    linear-gradient(-18deg,transparent 47%,rgba(235,177,216,.65) 48% 50%,transparent 51%);
}

.york-split { display: grid; grid-template-columns: 1fr 1fr; }
.york-half { position: relative; overflow: hidden; }
.york-label {
  position: absolute;
  z-index: 3;
  top: 1rem;
  left: 1rem;
  padding: .35rem .5rem;
  border: 1px solid var(--border-strong);
  border-radius: 2px;
  background: rgba(8,10,8,.75);
  color: var(--gold-light);
  font-family: Cinzel,serif;
  font-size: .55rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}
.york-grass { background: linear-gradient(#758264 0 25%,#4f4436 25% 100%); }
.york-street { background: linear-gradient(#4f5050 0 25%,#4a4037 25% 60%,#2e2924 60% 100%); }
.roman-plan {
  position: absolute;
  left: 12%;
  right: 12%;
  bottom: 10%;
  height: 58%;
  border: 8px double rgba(120,200,195,.72);
  background:
    linear-gradient(90deg,transparent 45%,rgba(120,200,195,.55) 46% 54%,transparent 55%),
    linear-gradient(transparent 45%,rgba(120,200,195,.55) 46% 54%,transparent 55%);
  box-shadow: 0 0 22px rgba(120,200,195,.32);
}
.attenuation {
  position: absolute;
  left: 8%;
  right: 8%;
  top: 30%;
  height: 56%;
  background:
    repeating-linear-gradient(0deg,rgba(120,200,195,.45) 0 2px,transparent 2px 14px);
  mask-image: linear-gradient(#000,transparent 55%);
}

.silchester { background: radial-gradient(circle at 52% 48%,#284036,#101512 75%); }
.town-grid {
  position: absolute;
  inset: 13%;
  display: grid;
  grid-template-columns: repeat(4,1fr);
  grid-template-rows: repeat(3,1fr);
  gap: 11px;
  transform: rotate(-9deg);
}
.town-grid span { border: 2px solid rgba(122,201,195,.58); background: rgba(38,92,83,.16); }
.town-road { position: absolute; background: rgba(221,197,105,.84); box-shadow: 0 0 13px rgba(201,168,76,.4); }
.road-a { left: 8%; right: 8%; top: 48%; height: 13px; transform: rotate(-9deg); }
.road-b { top: 6%; bottom: 6%; left: 45%; width: 13px; transform: rotate(-9deg); }
.road-c { top: 12%; bottom: 12%; left: 69%; width: 9px; transform: rotate(-9deg); opacity: .75; }

.binchester { background: linear-gradient(135deg,#66705e,#202c24); }
.fort-outline { position: absolute; left: 17%; top: 17%; width: 50%; height: 60%; border: 8px double rgba(240,224,156,.72); transform: rotate(-6deg); }
.fort-road { position: absolute; left: 3%; right: 3%; top: 48%; height: 17px; transform: rotate(-6deg); background: var(--gold); box-shadow: 0 0 16px rgba(201,168,76,.45); }
.aerial-line { position: absolute; left: 59%; top: 12%; width: 12px; height: 66%; transform: rotate(42deg); background: rgba(208,113,171,.72); }
.lidar-extension { position: absolute; left: 68%; top: 50%; width: 40%; border-top: 8px dashed var(--radar); transform: rotate(-20deg); }
.method-tag {
  position: absolute;
  padding: .3rem .45rem;
  border: 1px solid;
  border-radius: 2px;
  background: rgba(8,10,8,.72);
  font-family: Cinzel,serif;
  font-size: .48rem;
  letter-spacing: .07em;
  text-transform: uppercase;
}
.tag-geo { left: 7%; bottom: 7%; color: var(--gold-light); border-color: var(--gold-dim); }
.tag-air { left: 43%; top: 7%; color: #efbddb; border-color: rgba(208,113,171,.5); }
.tag-lidar { right: 7%; bottom: 16%; color: #a7e4df; border-color: var(--radar-border); }

.limits-comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1.5rem; }
.limits-column {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}
.spectral-limit { border-top: 3px solid var(--infrared); }
.gpr-limit { border-top: 3px solid var(--radar); }
.limit-heading { display: grid; grid-template-columns: 56px 1fr; gap: 1rem; align-items: center; margin-bottom: 1rem; }
.limit-symbol {
  width: 50px;
  height: 50px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  color: var(--gold-light);
  font-size: 1.35rem;
}
.limit-heading h3 { margin-top: .22rem; color: var(--text-light); font-family: Cinzel,serif; font-size: .92rem; }
.limits-column ul { list-style: none; }
.limits-column li { padding: .7rem 0 .7rem 1.3rem; border-bottom: 1px solid var(--border); color: var(--muted); font-size: .88rem; }
.limits-column li:last-child { border-bottom: 0; }
.limits-column li::before { content: "—"; float: left; margin-left: -1.3rem; color: var(--gold-dim); }
.limits-column strong { color: #d4d0c5; }
.failure-message {
  max-width: 920px;
  margin: 1.5rem auto 4.5rem;
  padding: 1.5rem 1.7rem;
  border: 1px solid var(--radar-border);
  border-radius: var(--radius);
  background: linear-gradient(135deg,rgba(120,200,195,.06),rgba(13,16,13,.94));
}
.failure-message h3 { margin: .35rem 0 .55rem; color: var(--text-light); font-family: Cinzel,serif; font-size: 1.1rem; }
.failure-message p:last-child { color: var(--muted); }

.toolkit-table { overflow: hidden; border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--panel); }
.toolkit-row { display: grid; grid-template-columns: .78fr 1.25fr 1.2fr 1fr; border-bottom: 1px solid var(--border); }
.toolkit-row:last-child { border-bottom: 0; }
.toolkit-row > div { padding: .9rem 1rem; border-right: 1px solid var(--border); color: var(--muted); font-size: .84rem; line-height: 1.5; }
.toolkit-row > div:last-child { border-right: 0; }
.toolkit-header { background: rgba(201,168,76,.08); }
.toolkit-header > div { color: var(--gold-light); font-family: Cinzel,serif; font-size: .59rem; font-weight: 700; letter-spacing: .07em; text-transform: uppercase; }
.toolkit-row strong { color: var(--text-light); font-family: Cinzel,serif; font-size: .7rem; }
.method-dot { width: 10px; height: 10px; display: inline-block; margin-right: .5rem; border-radius: 50%; }
.lidar-dot { background: var(--gold); }
.multi-dot { background: var(--infrared); }
.mag-dot { background: #c36e45; }
.gpr-dot { background: var(--radar); }
.map-dot { background: #9d8ac0; }
.dig-dot { background: #93a47b; }

.toolkit-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: .75rem;
  align-items: center;
  margin: 1.5rem 0 4.5rem;
}
.toolkit-flow > div {
  min-height: 150px;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
}
.toolkit-flow > div span { width: 28px; height: 28px; display: grid; place-items: center; border: 1px solid var(--radar-border); border-radius: 50%; color: var(--radar); font-family: Cinzel,serif; font-size: .58rem; }
.toolkit-flow strong { display: block; margin-top: .65rem; color: var(--text-light); font-family: Cinzel,serif; font-size: .72rem; }
.toolkit-flow small { display: block; margin-top: .4rem; color: var(--muted); font-size: .74rem; line-height: 1.45; }
.toolkit-flow > b { color: var(--gold-dim); font-size: 1.4rem; }

.research-guide { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; margin-bottom: 4.5rem; }
.research-card {
  display: flex;
  flex-direction: column;
  min-height: 270px;
  padding: 1.35rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  text-decoration: none;
  transition: transform .2s,border-color .2s,box-shadow .2s;
}
.research-card:hover { transform: translateY(-3px); border-color: var(--radar-border); box-shadow: 0 12px 32px rgba(0,0,0,.38); }
.featured-paper { grid-column: span 2; border-color: var(--border-strong); background: radial-gradient(circle at 90% 20%,rgba(201,168,76,.1),transparent 35%),var(--panel); }
.research-card h3 { margin: .45rem 0 .6rem; color: var(--text-light); font-family: Cinzel,serif; font-size: .94rem; line-height: 1.43; }
.research-card p { flex: 1; color: var(--muted); font-size: .87rem; }
.research-card strong { display: block; margin-top: 1rem; padding-top: .7rem; border-top: 1px solid var(--border); color: var(--radar); font-family: Inter,sans-serif; font-size: .73rem; }

.source-list { max-width: 960px; margin: 0 auto 3rem; }
.source-list article { display: grid; grid-template-columns: 44px 1fr; gap: 1rem; padding: 1rem .6rem; border-bottom: 1px solid var(--border); }
.source-list article > span { width: 30px; height: 30px; display: grid; place-items: center; border: 1px solid var(--radar-border); border-radius: 50%; color: var(--radar); font-family: Cinzel,serif; font-size: .58rem; }
.source-list h3 { color: var(--text-light); font-family: Cinzel,serif; font-size: .78rem; }
.source-list p { margin: .25rem 0; color: var(--muted); font-size: .86rem; }
.source-list a { color: var(--gold-light); font-family: Inter,sans-serif; font-size: .72rem; font-weight: 700; text-decoration: none; }
.source-list a:hover { text-decoration: underline; }

.closing {
  max-width: 930px;
  margin: 2rem auto 3rem;
  padding: 2rem 2.2rem;
  border: 1px solid var(--radar-border);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 88% 20%,rgba(120,200,195,.11),transparent 34%),
    linear-gradient(135deg,rgba(201,168,76,.05),rgba(13,16,13,.95));
}
.closing h2 { margin: .4rem 0 1rem; color: var(--text-light); font-family: Cinzel,serif; font-size: 1.43rem; line-height: 1.4; }
.closing p + p { margin-top: .8rem; }
.closing p:not(.mini-kicker) { color: var(--muted); }

.investigation-journey {
  display: grid;
  grid-template-columns: 1fr 70px 1.25fr 70px 1fr;
  align-items: center;
  gap: .6rem;
  margin: 0 auto 5rem;
}
.investigation-journey a {
  display: flex;
  flex-direction: column;
  min-height: 150px;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  text-decoration: none;
}
.investigation-journey a.current { border-color: var(--radar-border); background: rgba(120,200,195,.05); }
.investigation-journey span { color: var(--gold); font-family: Cinzel,serif; font-size: .55rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.investigation-journey strong { margin: .45rem 0; color: var(--text-light); font-family: Cinzel,serif; font-size: .78rem; line-height: 1.45; }
.investigation-journey em { margin-top: auto; color: var(--radar); font-size: .8rem; }
.journey-line { height: 2px; background: linear-gradient(90deg,var(--gold),var(--radar)); }
.journey-line.future { background: linear-gradient(90deg,var(--radar),var(--gold-dim)); opacity: .55; }

footer {
  padding: 4rem 1.5rem 2.2rem;
  border-top: 1px solid var(--border);
  background: var(--bg-dark);
  text-align: center;
}
.footer-mark { width: 48px; height: 48px; margin-bottom: .8rem; fill: none; stroke: var(--radar); stroke-width: 1.5; }
.footer-brand { color: var(--gold); font-family: Cinzel,serif; font-size: 1.05rem; font-weight: 700; }
.footer-tagline { margin: .35rem 0 1.2rem; color: var(--muted); font-family: Cinzel,serif; font-size: .6rem; letter-spacing: .28em; text-transform: uppercase; }
.footer-links { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.footer-links a { color: var(--gold-light); font-size: .8rem; text-decoration: none; }
.footer-copy { color: var(--muted); font-family: Inter,sans-serif; font-size: .67rem; }

.fade-in { opacity: 0; transform: translateY(18px); transition: opacity .65s ease,transform .65s ease; }
.fade-in.visible { opacity: 1; transform: none; }

@media (max-width: 1080px) {
  .hero { grid-template-columns: 1fr; padding-top: 5.5rem; }
  .hero-copy { margin: 0 auto; text-align: center; }
  .hero blockquote { margin-right: auto; margin-left: auto; text-align: left; }
  .hero-actions { justify-content: center; }
  .hero-visual { margin: 0 auto; min-height: 570px; }
  .case-card { grid-template-columns: 1fr; }
  .case-visual { border-right: 0; border-bottom: 1px solid var(--border); }
  .toolkit-flow { grid-template-columns: 1fr; }
  .toolkit-flow > b { transform: rotate(90deg); text-align: center; }
}
@media (max-width: 850px) {
  main { padding: 0 1rem; }
  .section-alt { margin: 0 -1rem; padding-right: 1rem; padding-left: 1rem; }
  .section-nav { justify-content: flex-start; }
  .three-signals,.season-sequence,.spectral-explanation,.frequency-grid,.limits-comparison { grid-template-columns: repeat(2,1fr); }
  .research-guide { grid-template-columns: repeat(2,1fr); }
  .featured-paper { grid-column: span 2; }
  .toolkit-row { grid-template-columns: .8fr 1.2fr 1fr; }
  .toolkit-row > div:nth-child(4) { grid-column: 1 / -1; border-top: 1px solid var(--border); border-right: 0; background: rgba(8,10,8,.22); }
  .toolkit-header > div:nth-child(4) { display: none; }
  .investigation-journey { grid-template-columns: 1fr; }
  .journey-line { width: 2px; height: 34px; margin: 0 auto; background: linear-gradient(var(--gold),var(--radar)); }
  .journey-line.future { background: linear-gradient(var(--radar),var(--gold-dim)); }
}
@media (max-width: 610px) {
  body { font-size: 17px; }
  .hero { padding: 5rem 1rem 4rem; gap: 2.3rem; }
  .hero h1 { font-size: clamp(3rem,15vw,4.8rem); }
  .hero-visual,.hero-visual svg { min-height: 460px; }
  .three-signals,.season-sequence,.spectral-explanation,.frequency-grid,.limits-comparison,.research-guide { grid-template-columns: 1fr; }
  .featured-paper { grid-column: span 1; }
  .spectral-viewer,.spectral-viewer svg,.gpr-viewer,.gpr-viewer svg { height: 430px; min-height: 430px; }
  .viewer-readout { right: 1rem; max-width: none; }
  .plain-language-note { grid-template-columns: 1fr; }
  .note-symbol { text-align: left; }
  .toolkit-table { overflow-x: auto; }
  .toolkit-row { min-width: 720px; grid-template-columns: .8fr 1.2fr 1fr 1fr; }
  .toolkit-row > div:nth-child(4) { grid-column: auto; border-top: 0; border-right: 0; background: transparent; }
  .toolkit-header > div:nth-child(4) { display: block; }
  .york-split { grid-template-columns: 1fr; }
  .york-half { min-height: 180px; }
  .case-copy { padding: 1.35rem; }
}
@media print {
  .section-nav,.hero-actions,.viewer-controls,.gpr-controls { display: none !important; }
  body { color: #222; background: white; }
  .hero { min-height: auto; color: white; background: #111; }
  .fade-in { opacity: 1; transform: none; }
}