/* ==========================================================
   Alderhorn Expedition Co. — Summit 45
   Palette: deep forest · charcoal · stone · warm sand · moss
   ========================================================== */
:root {
  --forest: #1f3a2b;
  --forest-2: #2a4a37;
  --forest-deep: #12231a;
  --charcoal: #141615;
  --charcoal-2: #1d201e;
  --stone: #8d918b;
  --stone-2: #b9b8b0;
  --stone-3: #e4e1d8;
  --sand: #d8c3a0;
  --sand-2: #efe6d6;
  --sand-3: #f7f2e9;
  --moss: #8a9b55;
  --ember: #e8803f;

  --display: "Anton", "Oswald", Impact, sans-serif;
  --serif: "Fraunces", Georgia, serif;
  --sans: "Manrope", system-ui, -apple-system, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --radius: 26px;
  --ease: cubic-bezier(.22, .8, .2, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { overflow-x: clip; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; font-family: var(--sans); color: var(--charcoal); background: var(--sand-3);
  line-height: 1.6; overflow-x: clip; -webkit-font-smoothing: antialiased;
}
img, video, canvas { display: block; max-width: 100%; }
picture { display: contents; }
[hidden] { display: none !important; }
a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; }
.container { width: min(1280px, 100% - 32px); margin-inline: auto; }
.skip { position: fixed; left: 16px; top: -60px; z-index: 100; background: var(--sand); color: var(--charcoal); padding: 10px 16px; border-radius: 10px; font-weight: 700; transition: top .3s; }
.skip:focus { top: 16px; }
:focus-visible { outline: 2px solid var(--sand); outline-offset: 3px; }
.noscript { padding: 20px 0; }

/* ---------- Type ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px; margin: 0 0 18px;
  font-family: var(--mono); font-size: .72rem; letter-spacing: .18em; text-transform: uppercase;
  color: var(--forest-2); font-weight: 500;
}
.eyebrow .dot { width: 7px; height: 7px; background: var(--ember); transform: rotate(45deg); box-shadow: 0 0 12px var(--ember); }
.section-title {
  font-family: var(--display); font-weight: 400; text-transform: uppercase;
  font-size: clamp(2.6rem, 6.4vw, 5.6rem); line-height: .94; letter-spacing: -.005em; margin: 0 0 20px;
}
.section-title em, .hero-title em, .gear-title em {
  font-family: var(--serif); font-style: italic; font-weight: 300; text-transform: none; letter-spacing: -.02em; color: var(--moss);
}
.section-title.light { color: var(--sand-3); }
.section-title.light em { color: var(--sand); }
.lead { font-size: 1.06rem; color: #4a504b; max-width: 48ch; margin: 0 0 28px; }
.lead.light { color: rgba(247, 242, 233, .74); }
.lead a { color: var(--forest); font-weight: 600; }

/* ---------- Buttons ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 17px 28px; border-radius: 999px; border: 1px solid transparent; text-decoration: none;
  font-weight: 700; font-size: .92rem; letter-spacing: .04em; text-transform: uppercase; overflow: hidden;
  transition: transform .4s var(--ease), background .4s, box-shadow .4s, color .4s;
}
.btn:hover { transform: translateY(-2px); }
.btn .arr { transition: transform .4s var(--ease); }
.btn:hover .arr { transform: translateX(4px); }
.btn-sm { padding: 11px 20px; font-size: .78rem; }
.btn-lg { padding: 21px 32px; font-size: 1.05rem; }
.btn-block { width: 100%; }
.btn-sand { background: var(--sand); color: var(--charcoal); box-shadow: 0 14px 34px -14px rgba(216, 195, 160, .7); }
.btn-sand::after {
  content: ""; position: absolute; inset: 0; transform: translateX(-120%);
  background: linear-gradient(100deg, transparent 30%, rgba(255, 255, 255, .55), transparent 70%);
  transition: transform .9s var(--ease);
}
.btn-sand:hover::after { transform: translateX(120%); }
.btn-sand:hover { background: var(--sand-2); }
.btn-glass { color: var(--sand-3); border-color: rgba(247, 242, 233, .3); background: rgba(20, 22, 21, .25); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.btn-glass:hover { background: rgba(20, 22, 21, .5); }

/* ---------- Nav ---------- */
.nav {
  position: fixed; top: 14px; left: 16px; right: 16px; z-index: 60; max-width: 1280px; margin-inline: auto;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 8px 8px 8px 22px; border-radius: 999px; color: var(--sand-3);
  background: rgba(18, 35, 26, .32); border: 1px solid rgba(247, 242, 233, .14);
  backdrop-filter: blur(18px) saturate(140%); -webkit-backdrop-filter: blur(18px) saturate(140%);
  transition: background .4s, box-shadow .4s, color .4s, transform .5s var(--ease);
  animation: navIn 1.1s var(--ease-out) both 1.4s;
}
.nav.scrolled { background: rgba(18, 35, 26, .72); box-shadow: 0 14px 40px -20px rgba(0, 0, 0, .5); }
.nav.on-light { background: rgba(247, 242, 233, .78); color: var(--charcoal); border-color: rgba(20, 22, 21, .08); }
@keyframes navIn { from { opacity: 0; transform: translateY(-20px); } }
.logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--display); font-size: 1.45rem; letter-spacing: .06em; text-transform: uppercase; line-height: 1; }
.logo svg { width: 30px; height: 19px; fill: var(--sand); }
.nav.on-light .logo svg { fill: var(--forest); }
.nav-links { display: flex; gap: 30px; font-size: .84rem; font-weight: 600; letter-spacing: .04em; }
.nav-links a { position: relative; text-decoration: none; opacity: .82; transition: opacity .3s; }
.nav-links a:hover { opacity: 1; }
.nav-links a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -5px; height: 1px; background: currentColor; transform: scaleX(0); transition: transform .4s var(--ease); }
.nav-links a:hover::after { transform: scaleX(1); }

/* ==========================================================
   1 · Hero
   ========================================================== */
.hero { position: relative; height: 185vh; background: var(--charcoal); }
.hero-sticky { position: sticky; top: 0; height: 100vh; height: 100svh; overflow: hidden; color: var(--sand-3); }
.hero-media { position: absolute; inset: -3%; transform-origin: 66% 70%; animation: heroIn 3.2s var(--ease-out) both; }
.hero-media img, .hero-media video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 62% 60%; }
.hero-media video { opacity: 0; transition: opacity 1.2s; }
.hero-media video.ready { opacity: 1; }
@keyframes heroIn { from { transform: scale(1.18); filter: brightness(.2) saturate(.6); } to { transform: scale(1); filter: none; } }
.hero-topo {
  position: absolute; inset: 0; background: url(assets/topo.svg) center / cover no-repeat;
  opacity: .16; mix-blend-mode: screen; pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 30% 40%, #000 20%, transparent 75%);
          mask-image: radial-gradient(ellipse 70% 70% at 30% 40%, #000 20%, transparent 75%);
  animation: topoIn 3s var(--ease-out) both .6s;
}
@keyframes topoIn { from { opacity: 0; transform: scale(1.08); } }
.hero-fx { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.hero-shade {
  position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(10, 14, 12, .78) 0%, rgba(10, 14, 12, .35) 38%, transparent 62%),
    linear-gradient(0deg, rgba(10, 14, 12, .8) 0%, transparent 38%),
    linear-gradient(180deg, rgba(10, 14, 12, .45) 0%, transparent 22%);
}
.hero-word {
  position: absolute; left: 0; right: 0; top: 11vh; display: flex; justify-content: center;
  font-family: var(--display); font-size: clamp(6rem, 21vw, 22rem); line-height: .8; letter-spacing: .02em;
  color: rgba(247, 242, 233, .9); mix-blend-mode: overlay; pointer-events: none; user-select: none;
}
.hero-word span { display: inline-block; animation: letterUp 1.6s var(--ease-out) both; }
.hero-word span.gap { width: .22em; }
.hero-word span:nth-child(1) { animation-delay: .5s; } .hero-word span:nth-child(2) { animation-delay: .58s; }
.hero-word span:nth-child(3) { animation-delay: .66s; } .hero-word span:nth-child(4) { animation-delay: .74s; }
.hero-word span:nth-child(6) { animation-delay: .86s; } .hero-word span:nth-child(7) { animation-delay: .94s; }
@keyframes letterUp { from { opacity: 0; transform: translateY(40%) scaleY(1.3); filter: blur(12px); } }

.hero-coords {
  position: absolute; right: 24px; top: 92px; display: flex; flex-direction: column; align-items: flex-end; gap: 4px;
  font-family: var(--mono); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; color: rgba(247, 242, 233, .7);
  animation: fadeIn 1.2s both 1.8s;
}
@keyframes fadeIn { from { opacity: 0; } }

.hero-copy { position: absolute; left: max(24px, calc((100vw - 1280px) / 2)); bottom: 9vh; max-width: 600px; }
.hero-copy .eyebrow { color: var(--sand); animation: fadeUp 1s var(--ease-out) both 1.3s; }
.hero-title { font-family: var(--display); font-weight: 400; text-transform: uppercase; font-size: clamp(3rem, 7vw, 6.4rem); line-height: .9; margin: 0 0 22px; }
.hero-title em { color: var(--sand); font-size: .92em; }
.hero-title .line { display: block; overflow: hidden; padding-bottom: .04em; }
.hero-title .line > span { display: block; animation: lineUp 1.3s var(--ease-out) both; }
.hero-title .line:nth-child(1) > span { animation-delay: 1.1s; }
.hero-title .line:nth-child(2) > span { animation-delay: 1.25s; }
@keyframes lineUp { from { transform: translateY(105%); } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(18px); } }
.hero-sub { font-size: 1.04rem; color: rgba(247, 242, 233, .8); max-width: 46ch; margin: 0 0 28px; animation: fadeUp 1s var(--ease-out) both 1.5s; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; animation: fadeUp 1s var(--ease-out) both 1.65s; }
.hero-proof { list-style: none; padding: 0; margin: 34px 0 0; display: flex; gap: 30px; animation: fadeUp 1s var(--ease-out) both 1.8s; }
.hero-proof li { display: flex; align-items: center; gap: 10px; }
.hero-proof b { font-family: var(--display); font-weight: 400; font-size: 2rem; color: var(--sand); line-height: 1; }
.hero-proof span { font-size: .7rem; line-height: 1.35; color: rgba(247, 242, 233, .66); letter-spacing: .04em; }
.scroll-cue { position: absolute; right: 24px; bottom: 9vh; display: flex; flex-direction: column; align-items: center; gap: 10px; text-decoration: none; animation: fadeIn 1s both 2.2s; }
.scroll-cue span { width: 1px; height: 64px; background: linear-gradient(var(--sand), transparent); transform-origin: top; animation: cue 2.2s var(--ease) infinite; }
.scroll-cue em { font-family: var(--mono); font-style: normal; font-size: .62rem; letter-spacing: .22em; text-transform: uppercase; writing-mode: vertical-rl; color: rgba(247, 242, 233, .6); }
@keyframes cue { 0% { transform: scaleY(0); } 50% { transform: scaleY(1); } 100% { transform: scaleY(1); opacity: 0; } }

/* ---------- Marquee ---------- */
.marquee { background: var(--forest-deep); color: var(--sand); overflow: hidden; padding: 20px 0; border-block: 1px solid rgba(216, 195, 160, .12); }
.marquee-track { display: flex; width: max-content; gap: 34px; align-items: center; animation: marquee 34s linear infinite; font-family: var(--display); font-size: 1.5rem; text-transform: uppercase; letter-spacing: .06em; }
.marquee-track i { font-style: normal; font-size: .7rem; color: var(--moss); }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ==========================================================
   2 · Field Test lab
   ========================================================== */
.lab { background: var(--sand-3); padding: 110px 0 90px; position: relative; }
.lab::before { content: ""; position: absolute; inset: 0; background: url(assets/topo.svg) center / 1400px auto no-repeat; opacity: .55; filter: invert(1) sepia(1) hue-rotate(60deg) saturate(.3); mix-blend-mode: multiply; pointer-events: none; -webkit-mask-image: linear-gradient(#000, transparent 50%); mask-image: linear-gradient(#000, transparent 50%); }
.lab-head { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: end; margin-bottom: 44px; position: relative; }
.lab-stage {
  --vh: min(88svh, 860px);
  position: relative; width: calc(100% - 32px); max-width: 1500px; margin-inline: auto; height: var(--vh);
  border-radius: 30px; overflow: hidden; background: var(--charcoal); color: var(--sand-3);
  box-shadow: 0 40px 90px -40px rgba(18, 35, 26, .7); isolation: isolate; touch-action: pan-y;
}
.lab-bg, .lab-fx, .lab-grade, .lab-flash { position: absolute; left: 0; right: 0; top: 0; height: var(--vh); width: 100%; pointer-events: none; }
.lab-bg img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: 50% 100%; opacity: 0; transform: scale(1.08); transition: opacity 1.4s var(--ease), transform 6s var(--ease-out), filter 1s; }
.lab-bg img.on { opacity: 1; transform: scale(1); }
.lab-grade { background: linear-gradient(180deg, rgba(10, 14, 12, .35), transparent 30%, transparent 60%, rgba(10, 14, 12, .55)); z-index: 3; }
.lab-stage[data-cold="1"] .lab-grade { background: linear-gradient(180deg, rgba(30, 50, 80, .35), transparent 30%, transparent 60%, rgba(10, 14, 20, .55)); }
.lab-flash { background: radial-gradient(ellipse at 60% 10%, rgba(220, 230, 255, .9), rgba(200, 210, 255, .3) 50%, transparent 80%); opacity: 0; z-index: 4; mix-blend-mode: screen; }
.lab-fx-back { z-index: 1; }
.lab-fx-front { z-index: 3; }

.spin {
  position: absolute; z-index: 2; left: 50%; bottom: calc(100% - var(--vh) + var(--vh) * .035); height: calc(var(--vh) * .64); aspect-ratio: 760 / 900;
  transform: translateX(-50%); cursor: grab; outline: none; user-select: none; -webkit-user-select: none;
}
.spin:active { cursor: grabbing; }
.spin:focus-visible { outline: 2px dashed var(--sand); outline-offset: -10px; border-radius: 20px; }
.spin-frames { position: absolute; inset: 0; transform-origin: 50% 96%; }
.spin-frames img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: contain; opacity: 0; pointer-events: none; filter: drop-shadow(0 30px 30px rgba(0, 0, 0, .45)); }
.spin-frames img:first-child { opacity: 1; }
.spin-shadow { position: absolute; left: 18%; right: 18%; bottom: 1%; height: 7%; border-radius: 50%; background: radial-gradient(closest-side, rgba(0, 0, 0, .75), transparent); filter: blur(6px); }
.spin-frames img { transition: filter 1.2s var(--ease); }
.lab-stage[data-env="mountain"] .spin-frames img { filter: drop-shadow(0 30px 30px rgba(0, 0, 0, .45)) sepia(.18) saturate(1.05) brightness(.96); }
.lab-stage[data-env="forest"] .spin-frames img { filter: drop-shadow(0 30px 30px rgba(0, 0, 0, .5)) brightness(.8) saturate(.9) contrast(1.05); }
.lab-stage[data-env="rain"] .spin-frames img { filter: drop-shadow(0 30px 30px rgba(0, 0, 0, .55)) brightness(.68) saturate(.72) contrast(1.1); }
.lab-stage[data-env="snow"] .spin-frames img { filter: drop-shadow(0 30px 30px rgba(0, 0, 0, .45)) brightness(.82) saturate(.62) hue-rotate(-8deg); }
.lab-stage[data-frost="1"] .spin-frames img { filter: drop-shadow(0 30px 30px rgba(0, 0, 0, .45)) brightness(.88) saturate(.5) contrast(1.05); }
.spin-light { position: absolute; inset: 0; pointer-events: none; -webkit-mask: var(--m) center / contain no-repeat; mask: var(--m) center / contain no-repeat; mix-blend-mode: soft-light; opacity: .7; transition: background 1.2s; background: radial-gradient(ellipse 60% 50% at 70% 20%, rgba(255, 200, 130, .7), transparent 70%); }
.lab-stage[data-env="forest"] .spin-light { background: radial-gradient(ellipse 60% 50% at 40% 10%, rgba(255, 236, 180, .55), transparent 70%); }
.lab-stage[data-env="rain"] .spin-light { background: radial-gradient(ellipse 70% 50% at 50% 0%, rgba(180, 200, 220, .4), transparent 70%); }
.lab-stage[data-env="snow"] .spin-light { background: radial-gradient(ellipse 70% 50% at 50% 10%, rgba(170, 200, 255, .55), transparent 70%); }

/* hotspots */
.hotspots { position: absolute; inset: 0; }
.hs { position: absolute; left: var(--x); top: var(--y); width: 30px; height: 30px; margin: -15px 0 0 -15px; border: 0; padding: 0; border-radius: 50%; background: transparent; opacity: 0; transform: scale(.4); pointer-events: none; transition: opacity .35s, transform .45s var(--ease); z-index: 2; }
.hs.vis { opacity: 1; transform: scale(1); pointer-events: auto; }
.hs::before { content: ""; position: absolute; inset: 8px; border-radius: 50%; background: var(--sand); box-shadow: 0 0 0 4px rgba(216, 195, 160, .3), 0 4px 14px rgba(0, 0, 0, .4); }
.hs::after { content: ""; position: absolute; inset: 0; border-radius: 50%; border: 1px solid var(--sand); animation: ping 2.2s var(--ease) infinite; }
@keyframes ping { from { transform: scale(.5); opacity: 1; } to { transform: scale(1.6); opacity: 0; } }
.hs-card {
  position: absolute; left: 50%; bottom: calc(100% + 12px); width: 230px; transform: translate(-50%, 6px); opacity: 0; pointer-events: none;
  padding: 14px 16px; border-radius: 16px; text-align: left; color: var(--sand-3);
  background: rgba(18, 22, 20, .78); border: 1px solid rgba(247, 242, 233, .16); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  transition: opacity .3s, transform .4s var(--ease); font-size: .82rem; line-height: 1.45;
}
.hs-card b { display: block; font-family: var(--mono); font-weight: 500; font-size: .68rem; letter-spacing: .14em; text-transform: uppercase; color: var(--sand); margin-bottom: 4px; }
.hs.open .hs-card, .hs:hover .hs-card, .hs:focus-visible .hs-card { opacity: 1; transform: translate(-50%, 0); }
.hs.right .hs-card { left: auto; right: -10px; transform: translate(0, 6px); }
.hs.right.open .hs-card, .hs.right:hover .hs-card, .hs.right:focus-visible .hs-card { transform: translate(0, 0); }
.hs.left .hs-card { left: -10px; transform: translate(0, 6px); }
.hs.left.open .hs-card, .hs.left:hover .hs-card, .hs.left:focus-visible .hs-card { transform: translate(0, 0); }

.spin-hint { position: absolute; z-index: 5; left: 50%; top: 22px; transform: translateX(-50%); display: flex; align-items: center; gap: 10px; padding: 9px 16px; border-radius: 999px; background: rgba(18, 22, 20, .5); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); font-family: var(--mono); font-size: .68rem; letter-spacing: .14em; text-transform: uppercase; transition: opacity .6s; white-space: nowrap; }
.spin-hint.gone { opacity: 0; }
.drag-ico { width: 34px; height: 2px; background: var(--sand); position: relative; animation: dragx 2s var(--ease) infinite; }
.drag-ico::before, .drag-ico::after { content: ""; position: absolute; top: -3px; width: 7px; height: 7px; border: solid var(--sand); border-width: 0 0 2px 2px; }
.drag-ico::before { left: -2px; transform: rotate(45deg); } .drag-ico::after { right: -2px; transform: rotate(-135deg); }
@keyframes dragx { 50% { transform: translateX(6px); } }

.angle-dial { position: absolute; z-index: 5; left: 24px; top: 22px; display: flex; align-items: center; gap: 10px; font-family: var(--mono); font-size: .8rem; letter-spacing: .1em; }
.angle-dial svg { width: 44px; height: 44px; }
.angle-dial circle { fill: none; stroke: rgba(247, 242, 233, .25); stroke-width: 2; }
.angle-dial path { fill: none; stroke: var(--sand); stroke-width: 3; stroke-linecap: round; }

.env-tabs { position: absolute; z-index: 5; left: 24px; bottom: 24px; display: flex; gap: 6px; padding: 6px; border-radius: 999px; background: rgba(18, 22, 20, .5); border: 1px solid rgba(247, 242, 233, .12); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); }
.env-tabs button { border: 0; background: transparent; padding: 10px 18px; border-radius: 999px; font-size: .82rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase; display: flex; gap: 8px; align-items: baseline; color: rgba(247, 242, 233, .75); transition: background .4s, color .4s; }
.env-tabs button span { font-family: var(--mono); font-size: .62rem; opacity: .6; }
.env-tabs button[aria-selected="true"] { background: var(--sand); color: var(--charcoal); }
.env-tabs button:hover:not([aria-selected="true"]) { background: rgba(247, 242, 233, .1); }

.lab-panel {
  position: absolute; z-index: 5; right: 24px; top: 50%; transform: translateY(-50%); width: 290px; padding: 22px;
  border-radius: 22px; background: rgba(18, 22, 20, .55); border: 1px solid rgba(247, 242, 233, .14);
  backdrop-filter: blur(18px) saturate(130%); -webkit-backdrop-filter: blur(18px) saturate(130%);
}
.panel-title { margin: 0 0 14px; font-family: var(--mono); font-weight: 500; font-size: .7rem; letter-spacing: .18em; text-transform: uppercase; color: var(--sand); }
.ctl { display: grid; grid-template-columns: 56px 1fr 70px; align-items: center; gap: 10px; margin-bottom: 10px; font-size: .78rem; font-weight: 600; }
.ctl output { font-family: var(--mono); font-size: .74rem; text-align: right; color: var(--sand-2); }
.ctl input[type=range] { -webkit-appearance: none; appearance: none; width: 100%; height: 22px; background: transparent; cursor: pointer; }
.ctl input[type=range]::-webkit-slider-runnable-track { height: 3px; border-radius: 3px; background: linear-gradient(90deg, var(--sand) var(--p, 0%), rgba(247, 242, 233, .2) var(--p, 0%)); }
.ctl input[type=range]::-moz-range-track { height: 3px; border-radius: 3px; background: rgba(247, 242, 233, .2); }
.ctl input[type=range]::-moz-range-progress { height: 3px; background: var(--sand); }
.ctl input[type=range]::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; margin-top: -6.5px; border-radius: 50%; background: var(--sand-3); border: 3px solid var(--sand); box-shadow: 0 2px 8px rgba(0, 0, 0, .4); }
.ctl input[type=range]::-moz-range-thumb { width: 12px; height: 12px; border-radius: 50%; background: var(--sand-3); border: 3px solid var(--sand); }
.readout { margin: 16px 0 18px; padding: 14px 0 0; border-top: 1px solid rgba(247, 242, 233, .12); display: grid; gap: 8px; }
.readout > div { display: flex; justify-content: space-between; align-items: center; gap: 10px; font-size: .78rem; }
.readout dt { color: rgba(247, 242, 233, .6); }
.readout dd { margin: 0; font-family: var(--mono); font-size: .76rem; color: var(--sand-2); display: flex; align-items: center; gap: 8px; }
.readout .bar { width: 80px; height: 4px; border-radius: 4px; background: rgba(247, 242, 233, .15); overflow: hidden; font-style: normal; }
.readout .bar b { display: block; height: 100%; width: 4%; background: linear-gradient(90deg, var(--moss), var(--sand), var(--ember)); background-size: 80px 100%; transition: width .4s; }
#stressBtn.running { background: var(--ember); color: var(--charcoal); pointer-events: none; }

.verdict {
  position: absolute; z-index: 6; left: 50%; top: 50%; width: min(420px, calc(100% - 40px)); transform: translate(-50%, -50%);
  padding: 26px; border-radius: 22px; text-align: center; background: rgba(18, 22, 20, .82); border: 1px solid rgba(216, 195, 160, .4);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); animation: verdictIn .8s var(--ease-out) both;
}
@keyframes verdictIn { from { opacity: 0; transform: translate(-50%, -40%) scale(.92); } }
.verdict .stamp { display: inline-block; font-family: var(--display); font-size: 3rem; line-height: 1; text-transform: uppercase; color: var(--moss); border: 3px solid var(--moss); padding: 4px 18px 0; border-radius: 8px; transform: rotate(-6deg); margin-bottom: 14px; animation: stamp .6s cubic-bezier(.3, 1.6, .5, 1) both .2s; }
@keyframes stamp { from { transform: rotate(-6deg) scale(2.4); opacity: 0; } }
.verdict p { margin: 0 0 16px; font-size: .92rem; color: rgba(247, 242, 233, .8); }
.verdict p b { display: block; font-family: var(--mono); font-weight: 500; font-size: .76rem; letter-spacing: .12em; color: var(--sand); margin-bottom: 6px; }

/* ==========================================================
   3 · Journey
   ========================================================== */
.journey { position: relative; height: 560vh; background: var(--charcoal); }
.journey-sticky { position: sticky; top: 0; height: 100vh; height: 100svh; overflow: hidden; color: var(--sand-3); }
.journey-media, .jm { position: absolute; inset: 0; margin: 0; }
.jm { opacity: 0; transition: opacity 1.2s var(--ease); }
.jm.on { opacity: 1; }
.jm img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.12); transition: transform 8s linear; }
.jm.on img { transform: scale(1.02); }
.journey-fx { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.journey-shade { position: absolute; inset: 0; pointer-events: none; background: linear-gradient(90deg, rgba(10, 14, 12, .82), rgba(10, 14, 12, .3) 45%, transparent 70%), linear-gradient(0deg, rgba(10, 14, 12, .7), transparent 40%), linear-gradient(180deg, rgba(10, 14, 12, .55), transparent 30%); }
.journey-head { position: absolute; left: max(24px, calc((100vw - 1280px) / 2)); top: 110px; max-width: 640px; }
.journey-head .eyebrow { color: var(--sand); }
.journey-head .section-title { font-size: clamp(2.4rem, 5vw, 4.6rem); }
.chapters { list-style: none; margin: 0; padding: 0; position: absolute; left: max(24px, calc((100vw - 1280px) / 2)); bottom: 15vh; width: min(480px, calc(100% - 48px)); height: 230px; }
.chapters li { position: absolute; inset: auto 0 0; opacity: 0; transform: translateY(30px); transition: opacity .7s var(--ease), transform .9s var(--ease); pointer-events: none; }
.chapters li.on { opacity: 1; transform: none; pointer-events: auto; }
.ch-num { font-family: var(--mono); font-size: .72rem; letter-spacing: .2em; text-transform: uppercase; color: var(--sand); }
.chapters h3 { font-family: var(--display); font-weight: 400; text-transform: uppercase; font-size: clamp(1.8rem, 3.2vw, 2.8rem); line-height: 1; margin: 10px 0 12px; }
.chapters p { margin: 0; color: rgba(247, 242, 233, .8); font-size: 1rem; }
.route { position: absolute; right: max(24px, calc((100vw - 1280px) / 2)); bottom: 15vh; width: min(460px, 40vw); }
.route svg { width: 100%; height: 90px; overflow: visible; }
.route path { fill: none; stroke-width: 2; vector-effect: non-scaling-stroke; }
.route-bg { stroke: rgba(247, 242, 233, .22); stroke-dasharray: 3 5; }
.route-fg { stroke: var(--sand); }
.route-dot { position: absolute; left: 0; top: 0; width: 14px; height: 14px; margin: -7px 0 0 -7px; border-radius: 50%; background: var(--ember); box-shadow: 0 0 0 5px rgba(232, 128, 63, .25), 0 0 20px var(--ember); }
.route-meta { display: flex; justify-content: space-between; margin-top: 12px; font-family: var(--mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: rgba(247, 242, 233, .75); }
.ch-progress { position: absolute; left: 0; right: 0; bottom: 0; height: 3px; background: rgba(247, 242, 233, .1); }
.ch-progress i { display: block; height: 100%; width: 0; background: var(--sand); }

/* ==========================================================
   Craft
   ========================================================== */
.craft { padding: 130px 0 110px; background: var(--sand-2); position: relative; overflow: hidden; }
.craft-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 70px; align-items: center; }
.specs { margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0 30px; }
.specs div { padding: 14px 0; border-top: 1px solid rgba(20, 22, 21, .14); }
.specs dt { font-family: var(--mono); font-size: .68rem; letter-spacing: .16em; text-transform: uppercase; color: var(--forest-2); margin-bottom: 4px; }
.specs dd { margin: 0; font-weight: 600; font-size: .94rem; }
.craft-media { position: relative; margin: 0; border-radius: var(--radius); overflow: hidden; box-shadow: 0 40px 80px -40px rgba(18, 35, 26, .6); }
.craft-media img { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: cover; transform: scale(var(--zs, 1.08)); transition: transform .2s linear; }
.craft-tags { list-style: none; margin: 0; padding: 0; }
.craft-tags li { position: absolute; left: var(--x); top: var(--y); transform: translate(-50%, -50%); padding: 7px 12px 7px 26px; border-radius: 999px; background: rgba(18, 22, 20, .62); color: var(--sand-3); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); font-family: var(--mono); font-size: .66rem; letter-spacing: .1em; text-transform: uppercase; white-space: nowrap; }
.craft-tags li::before { content: ""; position: absolute; left: 10px; top: 50%; width: 8px; height: 8px; margin-top: -4px; border-radius: 50%; background: var(--sand); }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; margin-top: 90px; }
.stat { border-top: 2px solid var(--charcoal); padding-top: 18px; }
.stat-num { font-family: var(--display); font-size: clamp(2.8rem, 5vw, 4.4rem); line-height: 1; }
.stat-unit { font-family: var(--display); font-size: 1.6rem; color: var(--forest-2); margin-left: 4px; }
.stat p { margin: 8px 0 0; color: #4a504b; font-size: .9rem; max-width: 24ch; }

/* ==========================================================
   Kit
   ========================================================== */
.kit { padding: 130px 0; background: var(--forest-deep); color: var(--sand-3); position: relative; overflow: hidden; }
.kit::before { content: ""; position: absolute; inset: 0; background: url(assets/topo.svg) center / cover no-repeat; opacity: .07; pointer-events: none; }
.split-head { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: end; margin-bottom: 54px; position: relative; }
.split-head .eyebrow { color: var(--sand); }
.kit-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; position: relative; }
.kit-card { padding: 18px; border-radius: 22px; background: rgba(247, 242, 233, .05); border: 1px solid rgba(247, 242, 233, .1); display: flex; flex-direction: column; transition: background .4s, transform .5s var(--ease), border-color .4s; }
.kit-card:hover { background: rgba(247, 242, 233, .09); transform: translateY(-6px); }
.kit-card.added { border-color: var(--sand); }
.kit-art { aspect-ratio: 1; border-radius: 16px; background: radial-gradient(circle at 50% 60%, #e9e5dc, #c9c5ba); display: grid; place-items: center; overflow: hidden; margin-bottom: 18px; }
.kit-art img { width: 82%; height: 82%; object-fit: contain; transition: transform .7s var(--ease); filter: drop-shadow(0 18px 18px rgba(0, 0, 0, .25)); }
.kit-card:hover .kit-art img { transform: scale(1.06) rotate(-2deg); }
.kit-card h3 { font-family: var(--display); font-weight: 400; text-transform: uppercase; font-size: 1.45rem; margin: 0 0 6px; letter-spacing: .02em; }
.kit-card p { margin: 0 0 18px; font-size: .88rem; color: rgba(247, 242, 233, .66); flex: 1; }
.kit-foot { display: flex; justify-content: space-between; align-items: center; }
.price { font-family: var(--mono); font-size: .95rem; color: var(--sand); }
.add { border: 1px solid rgba(216, 195, 160, .5); background: transparent; color: var(--sand-3); padding: 9px 16px; border-radius: 999px; font-size: .74rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; transition: background .3s, color .3s; }
.add:hover { background: rgba(216, 195, 160, .15); }
.add[aria-pressed="true"] { background: var(--sand); color: var(--charcoal); }

/* ---------- Reviews ---------- */
.reviews { padding: 120px 0; background: var(--stone-3); }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 30px; }
.review-grid blockquote { margin: 0; padding: 30px; border-radius: 22px; background: var(--sand-3); border: 1px solid rgba(20, 22, 21, .06); }
.review-grid p { font-family: var(--serif); font-style: italic; font-weight: 300; font-size: 1.3rem; line-height: 1.35; margin: 0 0 20px; }
.review-grid footer { font-family: var(--mono); font-size: .7rem; letter-spacing: .14em; text-transform: uppercase; color: var(--forest-2); }
.review-grid footer::before { content: "★★★★★  "; color: var(--ember); letter-spacing: .1em; }

/* ==========================================================
   4 · Gear Up
   ========================================================== */
.gearup { position: relative; min-height: 100vh; padding: 140px 0 100px; color: var(--sand-3); overflow: hidden; display: flex; align-items: center; background: var(--charcoal); }
.gearup-bg { position: absolute; inset: 0; }
.gearup-bg img { width: 100%; height: 100%; object-fit: cover; object-position: 40% 50%; transform: scale(var(--gs, 1.1)); }
.gearup::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(10, 14, 12, .1), rgba(10, 14, 12, .55) 70%), linear-gradient(0deg, rgba(10, 14, 12, .6), transparent 50%); pointer-events: none; }
.gearup-fx { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; pointer-events: none; }
.gearup-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.2fr 420px; gap: 50px; align-items: center; }
.gearup-copy .eyebrow { color: var(--sand); }
.gear-title { font-family: var(--display); font-weight: 400; text-transform: uppercase; font-size: clamp(5rem, 15vw, 14rem); line-height: .82; margin: 0 0 20px; letter-spacing: -.01em; text-shadow: 0 10px 60px rgba(0, 0, 0, .4); }
.gear-title em { color: var(--sand); }
.builder { padding: 26px; border-radius: 26px; background: rgba(18, 22, 20, .6); border: 1px solid rgba(247, 242, 233, .16); backdrop-filter: blur(20px) saturate(130%); -webkit-backdrop-filter: blur(20px) saturate(130%); }
.builder fieldset { border: 0; padding: 0; margin: 0 0 18px; }
.builder legend { font-family: var(--mono); font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; color: var(--sand); margin-bottom: 10px; padding: 0; }
.seg { display: flex; gap: 8px; }
.seg label { flex: 1; }
.seg input { position: absolute; opacity: 0; pointer-events: none; }
.seg span { display: flex; flex-direction: column; align-items: center; padding: 12px 6px; border-radius: 14px; border: 1px solid rgba(247, 242, 233, .2); font-weight: 700; cursor: pointer; transition: background .3s, border-color .3s, color .3s; }
.seg small { font-family: var(--mono); font-weight: 400; font-size: .66rem; opacity: .7; }
.seg input:checked + span { background: var(--sand); color: var(--charcoal); border-color: var(--sand); }
.seg input:focus-visible + span { outline: 2px solid var(--sand); outline-offset: 2px; }
.builder-kit { display: flex; justify-content: space-between; gap: 12px; padding: 14px 0; border-top: 1px solid rgba(247, 242, 233, .12); font-size: .84rem; }
.builder-kit em { font-style: normal; text-align: right; color: rgba(247, 242, 233, .75); }
.builder-kit a { color: var(--sand); }
.builder-total { display: flex; justify-content: space-between; align-items: baseline; padding: 14px 0 18px; border-top: 1px solid rgba(247, 242, 233, .12); }
.builder-total span { font-family: var(--mono); font-size: .72rem; letter-spacing: .18em; text-transform: uppercase; }
.builder-total b { font-family: var(--display); font-weight: 400; font-size: 2.6rem; line-height: 1; color: var(--sand); }
.trust { list-style: none; padding: 0; margin: 16px 0 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 16px; font-size: .72rem; color: rgba(247, 242, 233, .65); }
.trust li::before { content: "✓ "; color: var(--moss); }

/* ---------- FAQ ---------- */
.faq { padding: 120px 0; background: var(--sand-3); }
.faq-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 60px; }
.faq-list details { border-top: 1px solid rgba(20, 22, 21, .14); }
.faq-list details:last-child { border-bottom: 1px solid rgba(20, 22, 21, .14); }
.faq-list summary { list-style: none; cursor: pointer; padding: 22px 40px 22px 0; position: relative; font-weight: 700; font-size: 1.06rem; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%); font-size: 1.5rem; font-weight: 300; color: var(--forest); transition: transform .4s var(--ease); }
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-list p { margin: 0 0 22px; color: #4a504b; max-width: 62ch; }

/* ---------- Footer ---------- */
.footer { background: var(--charcoal); color: rgba(247, 242, 233, .72); padding: 80px 0 120px; font-size: .9rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.4fr; gap: 40px; }
.footer .logo { color: var(--sand-3); margin-bottom: 16px; }
.footer h3 { font-family: var(--mono); font-weight: 500; font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; color: var(--sand); margin: 0 0 14px; }
.footer address { font-style: normal; }
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--sand-3); }
.news label { display: block; font-family: var(--mono); font-size: .68rem; letter-spacing: .18em; text-transform: uppercase; color: var(--sand); margin-bottom: 14px; }
.news-row { display: flex; gap: 8px; }
.news input { flex: 1; min-width: 0; padding: 12px 18px; border-radius: 999px; border: 1px solid rgba(247, 242, 233, .2); background: rgba(247, 242, 233, .05); color: var(--sand-3); font: inherit; }
.news-msg { min-height: 1.4em; margin: 8px 0 0; font-size: .8rem; color: var(--sand); }
.copy { display: flex; justify-content: space-between; gap: 20px; margin-top: 60px; padding-top: 22px; border-top: 1px solid rgba(247, 242, 233, .1); font-size: .76rem; }
.copy p { margin: 0; }

/* ---------- Dock + toast ---------- */
.dock {
  position: fixed; z-index: 55; left: 50%; bottom: 18px; transform: translate(-50%, 140%); display: flex; align-items: center; gap: 14px;
  padding: 7px 7px 7px 10px; border-radius: 999px; background: rgba(18, 22, 20, .78); color: var(--sand-3);
  border: 1px solid rgba(247, 242, 233, .14); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 20px 50px -20px rgba(0, 0, 0, .6); transition: transform .6s var(--ease);
}
.dock.show { transform: translate(-50%, 0); }
.dock img { width: 40px; height: 47px; object-fit: contain; }
.dock div { display: flex; flex-direction: column; line-height: 1.2; padding-right: 8px; white-space: nowrap; }
.dock .btn { white-space: nowrap; }
.dock b { font-family: var(--display); font-weight: 400; font-size: 1.05rem; letter-spacing: .04em; text-transform: uppercase; }
.dock span { font-family: var(--mono); font-size: .66rem; color: rgba(247, 242, 233, .7); }
.toast { position: fixed; z-index: 70; left: 50%; top: 84px; transform: translate(-50%, -20px); opacity: 0; pointer-events: none; padding: 12px 20px; border-radius: 999px; background: var(--sand); color: var(--charcoal); font-weight: 700; font-size: .86rem; box-shadow: 0 16px 40px -16px rgba(0, 0, 0, .5); transition: opacity .4s, transform .5s var(--ease); }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ==========================================================
   Responsive
   ========================================================== */
@media (max-width: 1180px) and (min-width: 861px) {
  .spin { left: 40%; height: calc(var(--vh) * .58); }
}
@media (max-width: 1080px) {
  .kit-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .gearup-inner { grid-template-columns: 1fr; }
  .builder { max-width: 520px; }
}
@media (max-width: 860px) {
  .nav-links { display: none; }
  .lab-head, .split-head, .craft-grid, .faq-grid { grid-template-columns: 1fr; gap: 20px; }
  .craft-grid { gap: 40px; }
  .stats { grid-template-columns: 1fr 1fr; gap: 30px 20px; margin-top: 60px; }
  .review-grid { grid-template-columns: 1fr; }

  .lab-stage { --vh: min(76svh, 640px); height: auto; border-radius: 24px; }
  .lab-panel { position: relative; right: auto; top: auto; transform: none; width: auto; margin-top: var(--vh); border-radius: 0; border: 0; border-top: 1px solid rgba(247, 242, 233, .12); background: var(--charcoal-2); backdrop-filter: none; -webkit-backdrop-filter: none; }
  .env-tabs { left: 12px; right: 12px; bottom: auto; top: calc(var(--vh) - 64px); justify-content: space-between; }
  .env-tabs button { padding: 10px 10px; font-size: .72rem; flex: 1; justify-content: center; }
  .env-tabs button span { display: none; }
  .spin { height: calc(var(--vh) * .62); bottom: auto; top: calc(var(--vh) * .17); }
  .angle-dial { left: 14px; top: 14px; }
  .angle-dial svg { width: 36px; height: 36px; }
  .spin-hint { top: calc(var(--vh) - 112px); font-size: .6rem; padding: 8px 12px; }
  .verdict { top: calc(var(--vh) / 2); }
  .hs-card { width: 200px; }

  .route { left: 24px; right: 24px; width: auto; top: auto; bottom: calc(15vh + 250px); }
  .route svg { height: 60px; }
  .chapters { bottom: 6vh; }
  .journey-shade { background: linear-gradient(0deg, rgba(10, 14, 12, .95) 0%, rgba(10, 14, 12, .75) 34%, transparent 58%), linear-gradient(180deg, rgba(10, 14, 12, .7), transparent 45%); }
  .chapters p { font-size: .94rem; }
  .journey-head { top: 96px; right: 24px; }
}
@media (max-width: 760px) {
  .hero { height: 150vh; }
  .hero-media { inset: auto 0; top: -13%; height: 80%; transform-origin: 50% 70%; }
  .hero-media img, .hero-media video { object-position: 50% 50%; }
  .hero-title { font-size: 2.7rem; margin-bottom: 14px; }
  .hero-copy .eyebrow { margin-bottom: 12px; }
  .hero-media video { display: none; }
  .hero-word { top: 12vh; font-size: 27vw; }
  .hero-coords { display: none; }
  .hero-shade { background: linear-gradient(0deg, rgba(10, 14, 12, 1) 0%, rgba(10, 14, 12, .85) 30%, rgba(10, 14, 12, .2) 50%, transparent 60%), linear-gradient(180deg, rgba(10, 14, 12, .4), transparent 26%); }
  .hero-copy { left: 16px; right: 16px; bottom: 32px; }
  .hero-sub { font-size: .96rem; margin-bottom: 22px; }
  .hero-proof { gap: 18px; margin-top: 24px; }
  .hero-proof b { font-size: 1.6rem; }
  .hero-proof li:nth-child(3) { display: none; }
  .scroll-cue { display: none; }
  .hero-ctas .btn { flex: 1; padding: 15px 14px; font-size: .8rem; }
  .lab { padding: 80px 0 60px; }
  .lab-stage { width: calc(100% - 20px); }
  .kit, .craft, .reviews, .faq { padding: 84px 0; }
  .kit-grid { gap: 10px; }
  .kit-card { padding: 10px; border-radius: 16px; }
  .kit-card h3 { font-size: 1.1rem; }
  .kit-card p { font-size: .78rem; }
  .kit-foot { flex-direction: column; align-items: stretch; gap: 8px; }
  .add { padding: 9px 8px; }
  .specs { grid-template-columns: 1fr; }
  .craft-tags li { font-size: .56rem; padding: 5px 9px 5px 20px; }
  .craft-tags li::before { left: 7px; width: 6px; height: 6px; margin-top: -3px; }
  .gearup { padding: 110px 0 80px; }
  .footer-grid { grid-template-columns: 1fr; }
  .copy { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}