.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding-inline: max(1.5rem, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid transparent;
  transition-property: background-color, border-color, backdrop-filter;
  transition-duration: 250ms;
}

.site-header.is-scrolled {
  background: rgba(7, 18, 15, 0.82);
  border-color: var(--line);
  backdrop-filter: blur(16px);
}

.brand { display: inline-flex; align-items: center; text-decoration: none; }
.brand span { font-family: var(--font-display); font-size: 1.22rem; font-weight: 800; letter-spacing: -0.03em; }

.site-nav { display: flex; align-items: center; gap: clamp(1.1rem, 2.7vw, 2.3rem); }
.site-nav a { font-size: 0.83rem; font-weight: 700; letter-spacing: 0.055em; text-decoration: none; text-transform: uppercase; }
.nav-cta { padding: 0.7rem 1rem; color: var(--ink); background: var(--sun); border-radius: 999px; }
.menu-button { display: none; }

.hero { position: relative; min-height: 100svh; overflow: hidden; background: var(--forest); isolation: isolate; }
.hero-image { position: absolute; inset: 0; z-index: -2; background: url("../img/site/hero-forest-v2.webp") 35% center / cover no-repeat; transform: scale(1.015); animation: hero-breathe 12s ease-in-out infinite alternate; }
.hero-shade { position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(7, 18, 15, 0.05) 0%, rgba(7, 18, 15, 0.28) 43%, rgba(7, 18, 15, 0.88) 76%, rgba(7, 18, 15, 0.96) 100%), linear-gradient(0deg, rgba(7, 18, 15, 0.76), transparent 30%); }
.hero-content { display: flex; flex-direction: column; justify-content: center; min-height: 100svh; width: min(56rem, 50vw); margin-inline-start: auto; padding: calc(var(--header-height) + 3rem) max(5vw, calc((100vw - 1180px) / 2)) 5rem 2rem; }
.eyebrow { margin-bottom: 1.4rem; color: var(--sun); font-size: 0.76rem; font-weight: 800; letter-spacing: 0.15em; text-transform: uppercase; }
.hero h1 { margin-bottom: 1.8rem; color: var(--cream); }
.hero-copy { max-width: 58ch; margin-bottom: 2rem; color: var(--mist); font-size: clamp(1rem, 1.35vw, 1.22rem); line-height: 1.65; text-wrap: pretty; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.permission-note { margin: 1.5rem 0 0; color: rgba(243, 234, 212, 0.72); font-size: 0.77rem; }
.permission-note span { margin-inline-end: 0.45rem; color: #91ce99; }
.scroll-cue { position: absolute; inset-block-end: 2rem; inset-inline-start: 50%; display: grid; justify-items: center; gap: 0.65rem; color: rgba(255, 244, 216, 0.74); font-size: 0.65rem; font-weight: 700; letter-spacing: 0.16em; text-decoration: none; text-transform: uppercase; transform: translateX(-50%); }
.scroll-cue i { width: 1px; height: 38px; background: linear-gradient(var(--sun) 50%, transparent 50%); background-size: 100% 200%; animation: scroll-line 1.8s ease-in-out infinite; }

.trail-intro, .trust-section { position: relative; z-index: 2; padding: clamp(6rem, 11vw, 10rem) 0; background: rgba(11, 28, 23, 0.91); }
.trail-intro > *, .trust-section > * { width: var(--page); margin-inline: auto; }
.section-kicker { display: flex; align-items: center; gap: 1.2rem; margin-bottom: clamp(2.5rem, 5vw, 4.5rem); color: var(--sage); font-size: 0.7rem; font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase; }
.section-kicker i { flex: 1; height: 1px; background: var(--line); }
.intro-grid, .trust-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; align-items: end; gap: clamp(3rem, 8vw, 8rem); }
.intro-grid h2, .trust-grid h2 { margin-bottom: 0; }
.intro-grid > div > p, .trust-grid > div > p { max-width: 52ch; color: var(--mist); font-size: clamp(1rem, 1.4vw, 1.18rem); text-wrap: pretty; }
.platform-list { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 2rem; }
.platform-list span { padding: 0.55rem 0.82rem; border: 1px solid rgba(201, 212, 201, 0.26); border-radius: 999px; color: var(--cream); font-size: 0.72rem; font-weight: 700; }

.trail { position: relative; z-index: 1; min-height: 400vh; padding-block: 12vh; overflow: hidden; background: linear-gradient(rgba(11, 28, 23, 0.76), rgba(7, 18, 15, 0.93)); }
.trail-line, .footprint-track { position: absolute; inset-block: 0; inset-inline-start: 50%; width: min(18vw, 190px); height: 100%; transform: translateX(-50%); }
.trail-line { visibility: hidden; pointer-events: none; }
.trail-line path { fill: none; stroke: none; }
.footprint-track { z-index: 1; pointer-events: none; }
.footprint { position: absolute; width: clamp(24px, 2.6vw, 34px); height: auto; color: rgba(243, 234, 212, 0.16); opacity: 0.28; filter: blur(1.4px); transform: translate(-50%, -50%) rotate(var(--step-angle)) scale(0.82); transition-property: color, opacity, filter, transform; transition-duration: 420ms; transition-timing-function: cubic-bezier(0.2, 0, 0, 1); }
.footprint svg { display: block; width: 100%; height: auto; overflow: visible; filter: drop-shadow(0 4px 5px rgba(0, 0, 0, 0.32)); }
.footprint:nth-child(2n) svg { transform: scaleX(-1); }
.footprint.is-found { color: var(--sun); opacity: 0.92; filter: blur(0); transform: translate(-50%, -50%) rotate(var(--step-angle)) scale(1); }
.footprint.is-current { color: var(--cream); opacity: 1; filter: blur(0) drop-shadow(0 0 8px rgba(246, 206, 131, 0.68)); transform: translate(-50%, -50%) rotate(var(--step-angle)) scale(1.13); }
.feature-stop { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: center; min-height: 88vh; width: var(--page); margin: -12rem auto 22vh; opacity: 0.42; transition: opacity 500ms var(--ease); }
.feature-stop.is-active { opacity: 1; }
.feature-stop:nth-of-type(2) { margin-top: 5vh; }
.feature-stop-right .feature-card { grid-column: 2; }
.feature-stop-left .feature-card { grid-column: 1; }
.feature-number { position: absolute; inset-block-start: 16%; color: rgba(243, 234, 212, 0.12); font-family: var(--font-display); font-size: clamp(7rem, 16vw, 15rem); font-weight: 800; line-height: 1; }
.feature-stop-left .feature-number { inset-inline-start: -0.04em; }
.feature-stop-right .feature-number { inset-inline-end: -0.04em; }
.feature-card { position: relative; z-index: 2; max-width: 510px; padding: clamp(1.5rem, 3vw, 2.8rem); background: rgba(13, 34, 28, 0.79); border: 1px solid rgba(243, 234, 212, 0.16); border-radius: 2rem; box-shadow: 0 2rem 7rem rgba(0, 0, 0, 0.26), inset 0 1px rgba(255,255,255,0.04); backdrop-filter: blur(14px); }
.feature-label { margin-bottom: 1rem; color: var(--sun); font-size: 0.7rem; font-weight: 800; letter-spacing: 0.15em; text-transform: uppercase; }
.feature-card h3 { margin-bottom: 1.4rem; }
.feature-card > p:not(.feature-label, .chart-caption) { color: var(--mist); text-wrap: pretty; }
.detail-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.6rem; padding: 1.4rem 0 0; margin: 1.4rem 0 0; border-top: 1px solid var(--line); list-style: none; }
.detail-list li { color: var(--sage); font-size: 0.67rem; font-weight: 700; line-height: 1.4; text-transform: uppercase; }

.trust-section { background: var(--paper); color: var(--ink); }
.trust-section .section-kicker { color: var(--pine); }
.trust-section .section-kicker i { background: rgba(7, 18, 15, 0.2); }
.trust-grid { align-items: start; }
.trust-grid h2 em { color: var(--fur); }
.trust-grid > div > p { margin-top: 2rem; color: #3f554d; }
.permission-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin: 0; background: rgba(7, 18, 15, 0.18); }
.permission-grid div { padding: 1.5rem; background: var(--paper); }
.permission-grid dt { color: var(--forest); font-family: var(--font-display); font-size: 1.8rem; font-weight: 800; }
.permission-grid dd { margin: 0; color: #5b6d65; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }

.final-cta { position: relative; z-index: 2; min-height: 720px; overflow: hidden; background: #17372e url("../img/site/cta-forest-v1.webp") center / cover no-repeat; }
.cta-content { position: relative; z-index: 3; width: min(490px, calc(100% - 3rem)); margin-inline: auto max(1.5rem, calc((100vw - 1180px) / 2)); padding-block: clamp(8rem, 16vw, 12rem); }
.cta-content h2 { margin-bottom: 1.4rem; color: var(--cream); }
.cta-content > p:not(.eyebrow) { max-width: 40ch; margin-bottom: 2rem; color: var(--mist); }

footer { position: relative; z-index: 3; display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding: 2rem max(1.5rem, calc((100vw - 1180px) / 2)); background: var(--ink); color: var(--sage); font-size: 0.72rem; }
footer p { margin: 0; }
footer a { text-decoration-color: rgba(134, 167, 154, 0.5); text-underline-offset: 0.25em; }
.footer-brand { color: var(--paper); }
.footer-brand span { font-size: 1rem; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 0.7rem 1.25rem; }

@keyframes hero-breathe { to { transform: scale(1.045); } }
@keyframes scroll-line { 0% { background-position: 0 -100%; } 100% { background-position: 0 100%; } }

@media (max-width: 850px) {
  .hero-image { background-position: 31% center; }
  .hero-shade { background: linear-gradient(0deg, rgba(7,18,15,.97), rgba(7,18,15,.08) 72%), linear-gradient(90deg, transparent 25%, rgba(7,18,15,.45)); }
  .hero-content { justify-content: flex-end; width: 100%; margin: 0; padding: 8rem 1.5rem 7rem; }
  .hero h1 { max-width: 720px; }
  .hero-copy { max-width: 600px; }
  .intro-grid, .trust-grid { grid-template-columns: 1fr; align-items: start; }
  .trail-line, .footprint-track { inset-inline-start: 11%; }
  .feature-stop { grid-template-columns: 1fr; width: min(76%, 580px); margin-inline: 20px 6%; }
  .feature-stop .feature-card { grid-column: 1; }
  .feature-stop-right, .feature-stop-left { margin-inline-start: auto; }
  .feature-number { inset-inline-start: auto !important; inset-inline-end: 0 !important; }
}

@media (max-width: 700px) {
  .site-header { padding-inline: 1rem; }
  .menu-button { display: grid; place-content: center; gap: 6px; width: 46px; height: 46px; padding: 0; color: var(--paper); background: rgba(7,18,15,.42); border: 1px solid var(--line); border-radius: 50%; }
  .menu-line { display: block; width: 18px; height: 2px; background: currentColor; transition-property: transform; transition-duration: 180ms; }
  .menu-button[aria-expanded="true"] .menu-line:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-button[aria-expanded="true"] .menu-line:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }
  .site-nav { position: absolute; inset-block-start: calc(var(--header-height) - 1px); inset-inline: 0; display: grid; gap: 0; padding: 0.5rem 1rem 1rem; background: rgba(7,18,15,.96); border-bottom: 1px solid var(--line); opacity: 0; pointer-events: none; transform: translateY(-0.5rem); transition-property: opacity, transform; transition-duration: 180ms; }
  .site-nav.is-open { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .site-nav a { padding: 0.8rem; }
  .nav-cta { margin-top: 0.4rem; text-align: center; }
  .hero-image { background-position: 25% center; }
  .hero h1 { font-size: clamp(3rem, 14vw, 5rem); }
  .scroll-cue { inset-inline-start: auto; inset-inline-end: 1.5rem; transform: none; }
  .trail { padding-block-start: 24vh; }
  .trail-line, .footprint-track { inset-inline-start: 9%; }
  .footprint { width: 25px; }
  .feature-stop { min-height: 82vh; width: calc(100% - 3.2rem); margin: 0 1rem 18vh auto; }
  .feature-card { padding: 1.5rem; border-radius: 1.4rem; }
  .feature-number { inset-block-start: 7%; }
  .detail-list { grid-template-columns: 1fr; }
  .final-cta { min-height: 760px; }
  .cta-content { margin: 0 1.5rem 0 auto; padding-block-start: 9rem; }
  footer { align-items: flex-start; flex-direction: column; }
  .footer-links { justify-content: flex-start; }
}