/* Upright silver Iskra; moving light is confined to the recessed inner rim. */
:root { --paper: #e9e7df; --ink: #101112; --display: 'Inter', Arial, sans-serif; --mono: 'Inter', Arial, sans-serif; --edge: clamp(24px, 5.5vw, 100px); --header: 104px; --footer: 60px; }
html { background: #909090; }
.site-landscape { background: linear-gradient(110deg, #b7b7b7, #777 44%, #141414 78%); }
.site-landscape::before { content: ''; position: absolute; inset: 0; z-index: 1; background: radial-gradient(ellipse 30% 22% at 89% 88%, #08080870, transparent 100%); }
.central-iskra { object-fit: fill; }
.iskra-axis { left: 10%; right: 10%; transition: transform .65s cubic-bezier(.22, 1, .36, 1), opacity .45s; }
.iskra-axis picture { mask-image: linear-gradient(90deg, transparent, #000 14%, #000 86%, transparent); }
.lunar-haze, .lunar-light { display: none; }
.lunar-motion-paused .lunar-atmosphere > * { animation-play-state: paused; }
/* Stroked inner-contour masks leave both broad metal faces and the dark core untouched. */
.iskra-sheen, .lunar-atmosphere {
  mask-image: url('images/iskra-inner-rim-desktop.svg');
  mask-size: 100% 100%; mask-position: center; mask-repeat: no-repeat; mask-mode: alpha;
}
.iskra-sheen { position: absolute; inset: 0; overflow: hidden; pointer-events: none; mix-blend-mode: screen; }
.iskra-sheen-band {
  position: absolute; inset: 0 -30%; opacity: 0;
  background: linear-gradient(170deg, transparent 40%, #ffffff18 45%, #ffffffa6 48%, #fff 50%, #ffffffa6 52%, #ffffff18 55%, transparent 60%);
  transform: translate3d(0, -65%, 0);
}
.has-lunar-motion .iskra-sheen-band { animation: iskra-silver-sweep 8.4s linear infinite; }
.lunar-motion-paused .iskra-sheen-band { animation-play-state: paused; }
@keyframes iskra-silver-sweep {
  0% { transform: translate3d(0, -65%, 0); opacity: 0; }
  8%, 80% { opacity: 1; }
  88%, 100% { transform: translate3d(0, 65%, 0); opacity: 0; }
}
.word { color: var(--ink); }
.letters { width: 118px; }
.top { gap: 40px; }
.top-tools { gap: 12px; }
.langs { padding-left: 22px; }
.screen { padding-block: clamp(24px, 5vh, 56px); }
.hero { color: var(--ink); grid-template-columns: minmax(0, 1fr) 35% minmax(0, 1fr); }
.hero-copy { align-self: start; }
h1 { margin-top: 0; font-size: clamp(38px, 4vw, 64px); font-weight: 400; line-height: 1.12; letter-spacing: -.045em; }
h1 em { font: normal 400 clamp(64px, 6vw, 96px)/1.08 var(--display); letter-spacing: -.05em; margin-top: 4px; }
.lede { max-width: 300px; margin-top: 30px; color: #282828; font-size: 15px; line-height: 1.8; }
.hero-facts { align-self: end; padding: 0 0 4px 22px; border-left: 1px solid #dededc50; color: #f0f0eb; }
.hero-facts .eyebrow { font-size: 10px; color: #e0e0da; letter-spacing: .1em; }
.core-fact { font-size: clamp(18px, 1.55vw, 24px); font-weight: 400; margin-top: 12px; letter-spacing: -.03em; }
.essence-note { color: #d2d2cc; margin-top: 10px; font-size: 12px; line-height: 1.6; }
.foot { color: #dededb; }
.copyright { color: var(--ink); }
.detail-screen { align-items: flex-start; padding-block: clamp(28px, 5vh, 64px); }
.detail-content { width: min(56%, 740px); flex-shrink: 0; min-width: 0; margin-block: auto; padding: 0; border: 0; background: none; box-shadow: none; backdrop-filter: none; }
.detail-content > .eyebrow { margin-bottom: 32px; color: #b2b8b4; letter-spacing: .14em; }
.section-number { color: #7f8581; }
.detail-content h1 { margin: 0; font-size: clamp(38px, 3.5vw, 58px); font-weight: 400; line-height: 1.1; letter-spacing: -.045em; }
.direction h1 > span { font-size: .65em; color: #d4d6d3; letter-spacing: -.035em; }
.direction h1 em { margin-top: 14px; color: var(--paper); font: normal 400 clamp(42px, 4.2vw, 64px)/1.12 var(--display); letter-spacing: -.045em; }
.direction-text { gap: 18px; max-width: 540px; margin-top: 32px; }
.direction-text p, .method-steps p, .invite-body { color: #bcc1be; font-size: 14px; line-height: 1.85; }
.direction-text p:first-child { color: #eaebe6; font-size: 17px; line-height: 1.75; }
.detail-footer { display: flex; align-items: center; justify-content: space-between; gap: 28px; margin-top: 36px; padding-top: 20px; border-top: 1px solid #ffffff26; }
.detail-footer .text-link { min-height: 44px; margin: 0; padding-block: 10px; border: 0; font-size: 10px; text-decoration: underline; text-underline-offset: 5px; text-decoration-color: #ffffff55; }
.detail-footer .text-link > span { font: inherit; }
.chapter-next { display: inline-flex; flex-shrink: 0; align-items: center; gap: 20px; min-height: 48px; font: 400 13px/1.6 var(--body); }
.chapter-next > span > span { display: block; }
.chapter-next .next-label { margin-bottom: 3px; color: #a8b0aa; font: 9px/1.5 var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.chapter-next .enter-spark { display: block; width: 18px; height: 36px; transition: transform .25s; }
.chapter-next:hover .enter-spark { transform: translateY(-3px); }
.method-steps { gap: 0; margin-top: 32px; }
.method-steps li { gap: 20px; padding-block: 22px; border-top: 1px solid #ffffff26; }
.method-steps li::before { min-width: 22px; color: #919a94; font-size: 10px; }
.method-steps li > div { display: grid; grid-template-columns: minmax(110px, .7fr) 1.3fr; align-items: start; gap: 22px; width: 100%; }
.method h3 { margin: 0; font-size: 22px; font-weight: 400; line-height: 1.3; }
.method .detail-footer { margin-top: 0; }
.research-note { max-width: 260px; margin: 0; padding: 0; border: 0; color: #a8b0aa; font-size: 11px; }
.invite h1 { max-width: 620px; font: normal 400 clamp(48px, 4.6vw, 72px)/1.08 var(--display); letter-spacing: -.045em; }
.invite-body { max-width: 430px; margin-top: 32px; font-size: 16px; }
.stay { margin-top: 36px; }
.stay-label { display: block; margin-bottom: 8px; color: #c5cac6; font: 10px/1.6 var(--mono); }
.stay-row { gap: 18px; }
.stay input { flex-basis: 200px; min-height: 54px; font: 16px/1.5 var(--body); border-color: #ffffff65; }
.stay input::placeholder { color: #89928c; }
.stay button { flex: 0 1 auto; gap: 24px; min-height: 54px; padding: 12px 22px; background: linear-gradient(120deg, #e8e9e5, #b7bcb8); border: 0; }
.stay button .enter-spark { width: 14px; height: 28px; }
.stay-privacy { max-width: 430px; color: #959e97; font-size: 10px; }
@media (min-width: 761px) and (max-height: 720px) {
  :root { --header: 80px; --footer: 46px; }
  .screen { padding-block: 18px; }
  h1 { font-size: 38px; }
  h1 em { font-size: 64px; }
  .lede { margin-top: 20px; font-size: 13px; }
}
@media (min-width: 761px) and (max-width: 1100px) {
  :root { --edge: 30px; }
  .top { gap: 24px; }
  .detail-content { width: 64%; }
  .method-steps li > div { grid-template-columns: 1fr; gap: 8px; }
  .hero { grid-template-columns: minmax(0, 1fr) 28% minmax(0, 1fr); }
  h1 { font-size: 36px; }
  h1 em { font-size: 64px; }
  .lede { font-size: 13px; }
}
@media (max-width: 760px) {
  :root { --edge: 24px; --header: 124px; --footer: 46px; }
  .top { gap: 0; grid-template-rows: 68px 46px; }
  .letters { width: 100px; }
  .top-tools { color: #171717; }
  .langs { border-left-color: #17171740; }
  .lang-list { color: var(--paper); }
  .site-landscape { background: linear-gradient(110deg, #b8b8b8, #777 45%, #202020 75%, #121212); }
  .site-landscape::before { background: linear-gradient(180deg, #b9b9b9f2, #b9b9b9e0 11%, #b9b9b9b0 14%, #b9b9b970 17.5%, #b9b9b938 21%, #b9b9b914 25%, transparent 30%, transparent 68%, #111a 80%, #111 95%); }
  .iskra-axis { top: 11%; bottom: auto; left: 19.5%; right: 2.5%; height: 66%; }
  .iskra-axis picture { mask-image: url('images/iskra-upright-mobile-halo-20261003.webp'); mask-size: 100% 100%; mask-repeat: no-repeat; }
  .iskra-sheen, .lunar-atmosphere { mask-image: url('images/iskra-inner-rim-mobile.svg'); }
  .iskra-sheen-band { inset: 0 -30%; }
  .screen { padding-block: 16px; }
  .hero { grid-template-columns: 1fr; grid-template-rows: auto minmax(70px, 1fr) auto auto; }
  .hero-copy { width: 61%; }
  h1 { font-size: clamp(28px, 7vw, 40px); }
  h1 span, h1 em { display: block; }
  h1 em { font-size: 1.45em; margin: 4px 0 0; }
  .hero-copy .lede { display: none; }
  .hero-facts { width: 100%; background: none; backdrop-filter: none; padding: 12px 0 0; border: 0; border-top: 1px solid #ffffff35; }
  .hero-facts .eyebrow { font-size: 9px; }
  .core-fact { margin-top: 7px; font-size: clamp(16px, 4.7vw, 18px); }
  .essence-note { margin-top: 7px; font-size: 11px; }
  .copyright { color: #bdbdbb; }
  .foot { font-size: 10px; gap: 12px; }
  .foot nav { gap: 18px; }
  .detail-screen { padding-block: 28px; }
  .detail-content { width: 100%; margin-block: 0 auto; padding: 0; }
  .detail-content > .eyebrow { margin-bottom: 28px; font-size: 9px; }
  .detail-content h1 { margin: 0; font-size: 38px; }
  .direction h1 > span { font-size: 26px; }
  .direction h1 em { max-width: 390px; font-size: clamp(38px, 10vw, 48px); }
  .direction-text { margin-top: 28px; gap: 16px; }
  .direction-text p:first-child { font-size: 16px; }
  .direction-text p, .method-steps p { font-size: 13px; }
  .detail-footer { gap: 20px; margin-top: 28px; padding-top: 16px; }
  .detail-footer .text-link { max-width: 52%; line-height: 1.8; }
  .chapter-next { gap: 12px; font-size: 12px; }
  .method-steps { margin-top: 28px; }
  .method-steps li { gap: 16px; padding-block: 20px; }
  .method-steps li > div { grid-template-columns: 1fr; gap: 8px; }
  .method h3 { font-size: 23px; }
  .research-note { max-width: 180px; font-size: 10px; }
  .invite h1 { font-size: clamp(40px, 11vw, 58px); }
  .invite-body { margin-top: 28px; font-size: 15px; }
  .stay { margin-top: 32px; }
  .stay-row { display: grid; grid-template-columns: 1fr; gap: 18px; }
  .stay button { width: 100%; }
}
@media (max-width: 760px) and (max-height: 730px) {
  :root { --edge: 18px; --header: 96px; --footer: 36px; }
  .top { grid-template-rows: 44px 44px; }
  .iskra-axis { top: 12%; height: 57.5%; }
  .screen { padding-block: 10px; }
  .hero { grid-template-rows: auto minmax(40px, 1fr) auto auto; }
  h1 { margin-top: 0; font-size: 26px; }
  h1 em { font-size: 1.4em; }
  .hero-facts { padding-top: 9px; }
}

/* Home links lead to full documents; article pages scroll naturally. */
.spirit-home { height: 100svh; min-height: 560px; display: grid; grid-template-rows: var(--header) minmax(0, 1fr) var(--footer); }
.spirit-home .hero { height: 100%; min-height: 0; }
.spirit .iskra-axis { left: 17%; right: 17%; bottom: 0; }
.spirit-page { min-height: 100svh; display: grid; grid-template-rows: var(--header) 1fr auto; }
/* The scene is identical to home; a separate veil sits only behind reading areas. */
.spirit-page .world-layout { isolation: isolate; }
.spirit-page .world-layout::before { content: ''; position: absolute; inset: calc(-1 * var(--header)) 0 calc(-1 * var(--footer)); z-index: -1; pointer-events: none; background: linear-gradient(90deg, transparent 26%, #10111214 34%, #101112d1 44%, #101112de 68%, #101112d9); }
.spirit-page .detail-screen { min-height: calc(100svh - var(--header) - var(--footer)); }
.spirit-page .foot { min-height: var(--footer); }
.chapter-nav { display: flex; align-items: center; gap: 36px; margin-left: auto; font: 500 13px/1.5 var(--body); letter-spacing: .01em; }
.chapter-nav a { position: relative; display: inline-flex; align-items: center; justify-content: center; min-height: 48px; color: #c4c8c4; transition: color .2s; }
.chapter-nav a::after { content: ''; position: absolute; inset: auto 0 1px; height: 1px; background: currentColor; transform: scaleX(0); transform-origin: left; transition: transform .2s; }
.chapter-nav a:hover, .chapter-nav a[aria-current='page'] { color: #fff; }
.chapter-nav a:hover::after, .chapter-nav a[aria-current='page']::after { transform: scaleX(1); }
@media (max-width: 1100px) and (min-width: 761px) {
  .chapter-nav { gap: 26px; font-size: 12px; }
}
@media (max-width: 760px) {
  .spirit-home .hero { grid-template-rows: auto minmax(0, 1fr) auto; }
  .spirit .iskra-axis { top: 13%; bottom: auto; left: 27.5%; right: 9.5%; height: 68%; }
  .chapter-nav { grid-column: 1 / -1; grid-row: 2; display: grid; grid-template-columns: repeat(3, 1fr); width: 100%; gap: 0; margin: 0; border-bottom: 1px solid #ffffff26; font-size: 12px; }
  .chapter-nav a { min-height: 44px; }
  .chapter-nav { border-bottom-color: #17171740; }
  .chapter-nav a { color: #333; }
  .chapter-nav a:hover, .chapter-nav a[aria-current='page'] { color: #000; }
  .spirit-page .detail-content { margin: 0; }
  .spirit-page .world-layout::before { inset: 0; background: #101112ce; mask-image: linear-gradient(180deg, transparent, #000 24px, #000 calc(100% - 24px), transparent); }
}
@media (max-width: 760px) and (max-height: 730px) {
  .spirit .iskra-axis { top: 16%; height: 58%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ── The ground is alive. Light smoulders slowly under the grey and inside the dark: no waves, lines or
   particles — only luminance that swells and sinks, each patch in its own uneven rhythm, so the whole never
   visibly repeats. Runs only when motion is allowed (has-lunar-motion); otherwise the ground is still. */
.living-ground { position: absolute; inset: 0; z-index: 2; pointer-events: none; overflow: hidden; opacity: 0; transition: opacity 3s ease; }
.has-lunar-motion .living-ground { opacity: 1; }
.living-ground canvas { position: absolute; display: block; will-change: transform, opacity; }
.living-ground .g1 { left: -14%; top: -6%; width: 58%; height: 78%; }
.living-ground .g2 { left: 2%; top: 46%; width: 46%; height: 62%; }
.living-ground .d1 { right: -12%; top: 6%; width: 50%; height: 70%; }
.living-ground .d2 { right: 4%; top: 52%; width: 38%; height: 54%; }
.has-lunar-motion .living-ground .g1 { animation: smoulder-a 17s ease-in-out infinite, drift-a 41s ease-in-out infinite alternate; }
.has-lunar-motion .living-ground .g2 { animation: smoulder-b 23s ease-in-out infinite, drift-b 53s ease-in-out infinite alternate; }
.has-lunar-motion .living-ground .d1 { animation: smoulder-c 13s ease-in-out infinite, drift-b 47s ease-in-out infinite alternate; }
.has-lunar-motion .living-ground .d2 { animation: smoulder-a 19s ease-in-out -7s infinite, drift-a 37s ease-in-out infinite alternate; }
.lunar-motion-paused .living-ground canvas { animation-play-state: paused; }
@keyframes smoulder-a { 0%, 100% { opacity: .18; } 16% { opacity: .85; } 33% { opacity: .40; } 57% { opacity: 1; } 78% { opacity: .30; } }
@keyframes smoulder-b { 0%, 100% { opacity: .65; } 22% { opacity: .15; } 46% { opacity: .90; } 64% { opacity: .35; } 85% { opacity: 1; } }
@keyframes smoulder-c { 0%, 100% { opacity: .10; } 24% { opacity: 1; } 41% { opacity: .35; } 66% { opacity: .80; } 83% { opacity: .22; } }
@keyframes drift-a { from { transform: translate3d(-5%, -4%, 0) scale(.94); } to { transform: translate3d(6%, 5%, 0) scale(1.08); } }
@keyframes drift-b { from { transform: translate3d(5%, 4%, 0) scale(1.06); } to { transform: translate3d(-6%, -5%, 0) scale(.92); } }
@media (max-width: 760px) {
  .living-ground .g1 { left: -30%; top: -8%; width: 110%; height: 44%; }
  .living-ground .g2 { left: -10%; top: 24%; width: 80%; height: 36%; }
  .living-ground .d1 { right: -30%; top: 44%; width: 110%; height: 40%; }
  .living-ground .d2 { right: -6%; top: 66%; width: 86%; height: 36%; }
}

/* Home: one field under the claim. On phones the sentence and the field close the first screen
   instead of the three-word panel, which has no room there. */
.spirit-home .hero { grid-template-rows: auto auto minmax(0, 1fr); }
.spirit-home .hero-copy { grid-row: 1; }
.spirit-home .hero-facts { grid-row: 1 / -1; }
.hero-signup { grid-column: 1; grid-row: 2; min-width: 0; }
.hero-signup .lede { display: none; }
.hero-signup .stay { max-width: 390px; margin-top: clamp(20px, 4.4vh, 44px); }
.hero-signup .stay-row { gap: 12px; }
.hero-signup .stay input { flex: 1 1 150px; min-height: 48px; padding: 10px 0; font-size: 15px; }
.hero-signup .stay button { flex: 0 0 auto; gap: 16px; min-height: 48px; padding: 10px 18px; white-space: nowrap; }
.hero-signup .stay-note { margin-top: 10px; }
.hero-signup .stay-note:empty { min-height: 0; margin: 0; }
.hero-signup .stay-privacy { margin-top: 10px; }
.hero-signup .stay-note:not(:empty) + .stay-privacy { display: none; }
.foot a { color: inherit; }
@media (min-width: 761px) {
  .hero-signup .stay-label { color: #262626; }
  .hero-signup .stay input { color: var(--ink); border-bottom-color: #10111299; }
  .hero-signup .stay input::placeholder { color: #2e2e2e; }
  .hero-signup .stay input:focus { border-bottom-color: var(--ink); }
  .hero-signup .stay button { background: #141414; color: #f0f0eb; }
  .hero-signup .stay button:hover { background: #2e2e2e; }
  .hero-signup .stay-note, .hero-signup .stay-note.is-bad { color: var(--ink); }
  .hero-signup .stay-note.is-bad { font-weight: 500; }
  .hero-signup .stay-privacy { color: #262626; }
  .hero-signup .stay-privacy a { border-bottom-color: #26262680; }
}
@media (min-width: 761px) and (max-height: 720px) {
  .hero-signup .stay { margin-top: 16px; }
  .hero-signup .stay-label { display: none; }
}
@media (max-width: 760px) {
  .spirit-home .hero { grid-template-rows: auto minmax(0, 1fr) auto; }
  .spirit-home .hero-facts { display: none; }
  .spirit-home .iskra-axis { height: 61%; }
  .hero-signup { grid-row: 3; padding-top: 12px; border-top: 1px solid #ffffff35; }
  html[lang='de'] .spirit-home h1 em { width: min-content; }
  .hero-signup .lede { display: block; max-width: none; margin: 0; color: #e6e6e1; font-size: 13px; line-height: 1.6; }
  .hero-signup .stay { max-width: none; margin-top: 10px; }
  .hero-signup .stay-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  .hero-signup .stay-row { display: flex; gap: 10px; }
  .hero-signup .stay input { min-height: 46px; font-size: 16px; }
  .hero-signup .stay button { width: auto; min-height: 46px; padding: 10px 14px; }
  .hero-signup .stay button .enter-spark { display: none; }
  .hero-signup .stay-note { margin-top: 8px; font-size: 12px; }
  .hero-signup .stay-privacy { margin-top: 8px; line-height: 1.5; }
}
@media (max-width: 760px) and (max-height: 730px) {
  .spirit-home .iskra-axis { height: 50%; }
  .hero-signup { padding-top: 9px; }
  .hero-signup .lede { font-size: 12px; }
}