:root {
  --bg: #01030a;
  --bg-soft: #040713;
  --text: #f4f7ff;
  --muted: #a3aabd;
  --dim: #697083;
  --line: rgba(255, 255, 255, 0.11);
  --cyan: #24d7f5;
  --blue: #457cff;
  --violet: #8d62ff;
  --magenta: #ff39c8;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
  overflow-x: hidden;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background: var(--bg);
  font-family: "Space Grotesk", "Sora", "Segoe UI", Arial, sans-serif;
  font-weight: 300;
  overflow-x: hidden;
}

::selection {
  color: #02040a;
  background: rgba(255, 255, 255, 0.92);
}

a,
button {
  font: inherit;
}

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

button {
  border: 0;
  color: inherit;
  background: none;
  cursor: pointer;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 50;
  width: 100%;
  height: 1px;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--cyan), white, var(--magenta));
  box-shadow: 0 0 22px rgba(80, 150, 255, 0.65);
}

.cursor-aura {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 2;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0.1;
  filter: blur(46px);
  background: radial-gradient(circle, rgba(255, 255, 255, 0.22), rgba(36, 215, 245, 0.18), transparent 65%);
  transform: translate3d(calc(var(--cx, -400px) - 50%), calc(var(--cy, -400px) - 50%), 0);
  transition: transform 0.25s ease-out;
}

.particle-field {
  position: fixed;
  inset: 0;
  z-index: 8;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.68;
  mix-blend-mode: screen;
}

.universe {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 22% 30%, rgba(26, 96, 180, 0.16), transparent 32%),
    radial-gradient(circle at 76% 28%, rgba(194, 34, 163, 0.12), transparent 36%),
    linear-gradient(180deg, #01030a 0%, #030612 48%, #01030a 100%);
}

.star-field {
  position: absolute;
  inset: -10%;
  opacity: 0.25;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.8) 0 1px, transparent 1.7px),
    radial-gradient(circle, rgba(36, 215, 245, 0.6) 0 1px, transparent 1.7px);
  background-size: 138px 138px, 218px 218px;
  animation: starDrift 80s linear infinite;
}

.nebula {
  position: absolute;
  width: 56vw;
  height: 56vw;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.18;
  transform: translate3d(var(--mx, 0), var(--my, 0), 0);
  transition: transform 1.2s ease-out;
}

.nebula-blue {
  left: -22vw;
  top: 8vh;
  background: rgba(17, 112, 220, 0.72);
}

.nebula-magenta {
  right: -20vw;
  top: 18vh;
  background: rgba(226, 38, 178, 0.62);
}

.topbar {
  position: fixed;
  left: 42px;
  right: 42px;
  top: 36px;
  z-index: 30;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
}

.brand-mini,
.menu-toggle {
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
}

.brand-mini {
  position: relative;
  width: min(180px, 34vw);
  opacity: 0.78;
  transition: opacity 0.3s ease, filter 0.3s ease;
}

.brand-mini:hover {
  opacity: 1;
  filter: drop-shadow(0 0 18px rgba(255, 255, 255, 0.18));
}

.brand-mini img {
  display: block;
  width: 100%;
  height: auto;
}

.brand-mini::after,
.menu-toggle::after {
  content: "";
  position: absolute;
  left: 0;
  width: 48px;
  height: 1px;
  margin-top: 34px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
}

.top-actions {
  display: inline-flex;
  align-items: center;
  gap: 22px;
  pointer-events: auto;
}

.lang-toggle {
  display: inline-flex;
  gap: 2px;
  padding: 3px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
}

.lang-toggle span {
  display: grid;
  place-items: center;
  width: 28px;
  height: 22px;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.48);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 1px;
}

html[lang="es"] [data-lang-option="es"],
html[lang="en"] [data-lang-option="en"] {
  color: white;
  background: linear-gradient(135deg, rgba(36, 215, 245, 0.2), rgba(255, 57, 200, 0.2));
}

.menu-toggle {
  position: relative;
}

.menu-isotype {
  width: 28px;
  height: 28px;
  object-fit: contain;
  border-radius: 50%;
  filter:
    drop-shadow(0 0 8px rgba(36, 215, 245, 0.32))
    drop-shadow(0 0 10px rgba(255, 57, 200, 0.22));
}

.site-menu {
  position: fixed;
  top: 82px;
  right: 42px;
  z-index: 29;
  display: grid;
  gap: 14px;
  min-width: 250px;
  padding: 26px 28px 28px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  background:
    radial-gradient(circle at 20% 0%, rgba(36, 215, 245, 0.12), transparent 42%),
    radial-gradient(circle at 90% 100%, rgba(255, 57, 200, 0.16), transparent 46%),
    rgba(2, 6, 18, 0.86);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.52);
  backdrop-filter: blur(20px);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-10px);
  transition: opacity 0.28s ease, transform 0.28s ease;
}

body.menu-open .site-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.site-menu a {
  color: rgba(255, 255, 255, 0.72);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
  transition: color 0.25s ease, transform 0.25s ease;
}

.site-menu a:hover {
  color: white;
  transform: translateX(4px);
}

.site-menu .whatsapp-link {
  margin-top: 8px;
  color: white;
}

main,
.site-footer {
  position: relative;
  z-index: 3;
}

.chapter {
  position: relative;
  min-height: 640px;
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  isolation: isolate;
}

.hero {
  min-height: 100svh;
}

.hero-image {
  position: absolute;
  inset: -2%;
  z-index: -4;
  background: url("assets/hero.png") center bottom / cover no-repeat;
  transform: translate3d(var(--mx, 0), var(--my, 0), 0) scale(1.02);
  transition: transform 1.2s ease-out;
}

.hero-vignette {
  position: absolute;
  inset: 0;
  z-index: -3;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 50% 36%, rgba(1, 3, 10, 0.18), rgba(1, 3, 10, 0.04) 38%, transparent 54%),
    linear-gradient(180deg, rgba(1, 3, 10, 0.08) 0%, rgba(1, 3, 10, 0.06) 50%, rgba(1, 3, 10, 0.78) 100%),
    linear-gradient(90deg, rgba(1, 3, 10, 0.48), transparent 24%, transparent 76%, rgba(1, 3, 10, 0.4));
}

.living-horizon,
.understanding-horizon {
  position: absolute;
  left: 0;
  right: 0;
  z-index: 1;
  height: 2px;
  pointer-events: none;
  background: linear-gradient(90deg, transparent 4%, rgba(36, 215, 245, 0.82) 31%, white 50%, rgba(255, 57, 200, 0.86) 70%, transparent 96%);
  box-shadow: 0 0 24px rgba(255, 255, 255, 0.52), 0 0 80px rgba(36, 215, 245, 0.32), 0 0 110px rgba(255, 57, 200, 0.34);
  animation: horizonPulse 6s ease-in-out infinite;
}

.living-horizon {
  bottom: 22.2%;
  opacity: 0.58;
}

.living-horizon span,
.understanding-horizon::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 16vw;
  min-width: 140px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.82), rgba(69, 124, 255, 0.22) 22%, rgba(255, 57, 200, 0.16) 40%, transparent 66%);
  filter: blur(5px);
  transform: translate(-50%, -50%);
  animation: flareBreath 6s ease-in-out infinite;
}

.living-horizon::after,
.understanding-horizon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: -38px;
  width: 1px;
  height: 76px;
  background: linear-gradient(180deg, transparent, white, transparent);
  box-shadow: 0 0 18px rgba(255, 255, 255, 0.9);
  animation: verticalSignal 3.2s ease-in-out infinite;
}

.hero-copy {
  width: min(860px, calc(100% - 40px));
  margin: 0 auto;
  padding-top: clamp(110px, 16vh, 150px);
  text-align: center;
}

.micro-copy,
.section-kicker,
.chapter-number,
.side-label {
  color: rgba(255, 255, 255, 0.62);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 5px;
  text-transform: uppercase;
}

.micro-copy::after {
  content: "";
  display: block;
  width: 1px;
  height: 42px;
  margin: 16px auto 0;
  background: linear-gradient(180deg, white, transparent);
}

h1,
h2 {
  margin: 0;
  font-weight: 300;
  letter-spacing: 0;
}

h1 {
  margin-top: 42px;
  font-size: clamp(38px, 4.2vw, 60px);
  line-height: 1.18;
}

h2 {
  max-width: 560px;
  font-size: clamp(34px, 4.5vw, 64px);
  line-height: 1.15;
}

h1 span,
h2 span {
  color: transparent;
  background: linear-gradient(90deg, var(--cyan), var(--violet), var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
}

.begin-journey {
  position: static;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 13px;
  margin-top: 58px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
}

.begin-journey i {
  width: 28px;
  height: 28px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 50%;
  box-shadow: 0 0 18px rgba(141, 98, 255, 0.35);
}

.begin-journey i::after {
  content: "⌄";
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  color: rgba(255, 255, 255, 0.72);
}

.section-content {
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto;
}

.narrow-left {
  padding-left: clamp(100px, 19vw, 250px);
}

.problem {
  display: grid;
  align-items: center;
  min-height: 560px;
  background:
    linear-gradient(90deg, rgba(1, 3, 10, 0.7), rgba(1, 3, 10, 0.08) 45%, rgba(1, 3, 10, 0.18)),
    linear-gradient(180deg, rgba(1, 3, 10, 0.28), rgba(1, 3, 10, 0.72)),
    url("assets/comprension.png") center center / cover no-repeat;
}

.problem::before,
.understanding::before,
.bridge::before,
.philosophy::before,
.conversation::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -5;
  background: radial-gradient(circle at 78% 45%, rgba(141, 98, 255, 0.12), transparent 38%);
}

.problem p,
.understanding p,
.philosophy p,
.conversation p {
  max-width: 470px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.constellation-vortex {
  display: none;
}

.understanding {
  min-height: 560px;
  display: grid;
  align-items: center;
  background:
    linear-gradient(90deg, rgba(1, 3, 10, 0.72), rgba(1, 3, 10, 0.16) 50%, rgba(1, 3, 10, 0.42)),
    linear-gradient(180deg, rgba(1, 3, 10, 0.42), rgba(1, 3, 10, 0.7)),
    url("assets/Comprender_es_ver_lo_invisible.png") center bottom / cover no-repeat;
}

.signal-map {
  display: none;
}

.understanding-horizon {
  display: none;
}

.bridge {
  min-height: 330px;
  display: grid;
  place-items: center;
  background:
    radial-gradient(ellipse at 50% 50%, rgba(1, 3, 10, 0.08), rgba(1, 3, 10, 0.58) 68%),
    linear-gradient(180deg, rgba(1, 3, 10, 0.08), rgba(1, 3, 10, 0.7)),
    url("assets/aparicion_Realidar.png") center center / cover no-repeat;
}

.bridge-copy {
  width: min(760px, calc(100% - 44px));
  text-align: center;
}

.bridge-copy p {
  margin: 0 auto;
  max-width: 600px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.wordmark {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 30px auto 18px;
}

.wordmark img {
  display: block;
  width: min(680px, 78vw);
  height: auto;
  opacity: 0.96;
  filter:
    brightness(1.45)
    contrast(1.08)
    drop-shadow(0 0 18px rgba(255, 255, 255, 0.2))
    drop-shadow(0 0 42px rgba(158, 105, 255, 0.18));
}

.bridge-copy i {
  display: block;
  width: 48px;
  height: 1px;
  margin: 0 auto 26px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
}

.bridge-web {
  display: none;
}

.web-left {
  left: 0;
}

.web-right {
  right: 0;
  background:
    radial-gradient(circle at center, rgba(255, 255, 255, 0.8) 0 1px, transparent 1.8px),
    linear-gradient(240deg, rgba(255, 57, 200, 0.35), transparent 50%);
  background-size: 40px 40px, auto;
}

.ecosystem {
  min-height: 430px;
  padding-top: 46px;
  background:
    linear-gradient(180deg, rgba(1, 3, 10, 0.6), rgba(1, 3, 10, 0.26) 42%, rgba(1, 3, 10, 0.72)),
    url("assets/BaseDeCards.png") center bottom / cover no-repeat;
}

.side-label {
  width: min(var(--max), calc(100% - 44px));
  margin: 0 auto 24px;
}

.side-label span,
.chapter-number {
  display: block;
  margin-bottom: 10px;
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.system-panel {
  position: relative;
  min-height: 340px;
  padding: 44px clamp(24px, 4vw, 62px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  overflow: hidden;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  color: white;
  background: rgba(1, 3, 10, 0.1);
}

.system-panel:first-child {
  border-left: 0;
}

.system-panel::before {
  content: "";
  position: absolute;
  inset: auto -20% 0;
  height: 45%;
  opacity: 0.34;
  filter: blur(18px);
  background: radial-gradient(ellipse at 50% 100%, currentColor, transparent 58%);
}

.system-panel::after {
  display: none;
}

.system-panel.cyan {
  color: var(--cyan);
}

.system-panel.violet {
  color: var(--violet);
}

.system-panel.magenta {
  color: var(--magenta);
}

.system-icon,
.system-panel h3,
.system-panel p,
.system-panel a {
  position: relative;
  z-index: 1;
}

.system-icon {
  width: 72px;
  height: 72px;
  margin-bottom: 32px;
  filter: drop-shadow(0 0 20px currentColor);
}

.system-icon.circle {
  color: var(--cyan);
  border: 1.5px solid var(--cyan);
  border-radius: 50%;
  box-shadow:
    0 0 0 10px rgba(36, 215, 245, 0.035),
    0 0 34px rgba(36, 215, 245, 0.72),
    inset 0 0 22px rgba(36, 215, 245, 0.16);
}

.system-icon.triangle {
  color: var(--violet);
  clip-path: polygon(50% 5%, 95% 90%, 5% 90%);
  background:
    linear-gradient(135deg, rgba(141, 98, 255, 0.08), rgba(141, 98, 255, 0.25)),
    linear-gradient(var(--violet), var(--violet));
  box-shadow:
    0 0 0 10px rgba(141, 98, 255, 0.035),
    0 0 34px rgba(141, 98, 255, 0.56);
}

.system-icon.triangle::after {
  content: "";
  position: absolute;
  inset: 2px;
  clip-path: polygon(50% 10%, 90% 88%, 10% 88%);
  background: rgba(2, 6, 18, 0.94);
}

.system-icon.loops {
  position: relative;
  color: var(--magenta);
}

.system-icon.loops::before,
.system-icon.loops::after {
  content: "";
  position: absolute;
  inset: 12px 28px 12px 0;
  border: 1.5px solid var(--magenta);
  border-radius: 50%;
  box-shadow:
    0 0 0 8px rgba(255, 57, 200, 0.035),
    0 0 28px rgba(255, 57, 200, 0.62),
    inset 0 0 20px rgba(255, 57, 200, 0.12);
}

.system-icon.loops::after {
  inset: 12px 0 12px 28px;
}

.system-panel h3 {
  margin: 0 0 20px;
  color: white;
  font-size: 24px;
  font-weight: 400;
  letter-spacing: 15px;
}

.system-panel p {
  max-width: 300px;
  min-height: 78px;
  margin: 0;
  color: rgba(225, 230, 245, 0.68);
  font-size: 14px;
  line-height: 1.8;
}

.system-panel a,
.text-link {
  position: relative;
  display: inline-flex;
  margin-top: 22px;
  color: white;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 5px;
  text-transform: uppercase;
}

.system-panel a::after,
.text-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  transform: scaleX(0.64);
  transform-origin: left;
  transition: transform 0.35s ease;
}

.system-panel a:hover::after,
.text-link:hover::after {
  transform: scaleX(1);
}

.philosophy {
  min-height: 560px;
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) 1.1fr;
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: 86px clamp(22px, 6vw, 90px);
  background:
    radial-gradient(circle at 76% 50%, rgba(255, 57, 200, 0.18), transparent 30%),
    radial-gradient(circle at 58% 30%, rgba(36, 215, 245, 0.1), transparent 32%),
    linear-gradient(90deg, rgba(1, 3, 10, 0.96), rgba(1, 3, 10, 0.5) 58%, rgba(1, 3, 10, 0.9));
}

.philosophy-intro {
  max-width: 560px;
}

.philosophy-intro p {
  margin: 22px 0 0;
  max-width: 520px;
  font-size: 16px;
  line-height: 1.9;
}

.philosophy-presence {
  position: relative;
  min-height: 440px;
  pointer-events: none;
  mix-blend-mode: screen;
  isolation: isolate;
}

.philosophy-presence::before {
  content: "";
  position: absolute;
  inset: 10% 0 6% 16%;
  z-index: -1;
  border-radius: 50%;
  background:
    radial-gradient(circle, rgba(255, 255, 255, 0.18), transparent 10%),
    radial-gradient(circle, rgba(36, 215, 245, 0.18), transparent 36%),
    radial-gradient(circle, rgba(255, 57, 200, 0.16), transparent 56%);
  filter: blur(18px);
  opacity: 0.72;
  animation: flareBreath 6.8s ease-in-out infinite;
}

.philosophy-presence img {
  position: absolute;
  right: -4%;
  top: 50%;
  width: min(760px, 56vw);
  height: auto;
  opacity: 0.46;
  transform: translateY(-50%);
  filter: saturate(1.08) contrast(1.06);
  mask-image: linear-gradient(90deg, transparent 0%, black 16%, black 78%, transparent 100%);
}

.conversation {
  min-height: 350px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 70px clamp(22px, 6vw, 90px);
}

.conversation .narrow-left {
  width: auto;
  padding-left: 0;
  margin: 0;
}

.conversation-copy {
  max-width: 430px;
}

.conversation-eclipse {
  position: absolute;
  right: -8vw;
  top: -10%;
  width: min(38vw, 520px);
  min-width: 360px;
  aspect-ratio: 1;
  border-radius: 50%;
  border-left: 2px solid rgba(255, 255, 255, 0.15);
  box-shadow:
    -10px 0 26px rgba(255, 255, 255, 0.16),
    -22px 0 50px rgba(255, 57, 200, 0.48),
    -42px 0 92px rgba(141, 98, 255, 0.28);
  opacity: 0.9;
}

.site-footer {
  padding: 34px 22px 28px;
  display: grid;
  justify-items: center;
  gap: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  text-align: center;
}

.footer-logo {
  display: block;
  width: 54px;
  height: auto;
  opacity: 0.92;
  filter:
    drop-shadow(0 0 14px rgba(36, 215, 245, 0.36))
    drop-shadow(0 0 18px rgba(255, 57, 200, 0.26));
}

.site-footer p {
  margin: 0;
  color: rgba(255, 255, 255, 0.58);
  font-size: 11px;
  letter-spacing: 6px;
  line-height: 1.8;
  text-transform: uppercase;
}

.site-footer nav,
.social-links {
  display: flex;
  gap: clamp(20px, 5vw, 52px);
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}

.site-footer nav a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 4px;
  text-transform: uppercase;
}

.social-links {
  gap: 24px;
}

.social-links a {
  color: white;
  font-size: 15px;
  font-weight: 600;
}

.reveal {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 1s ease,
    transform 1s cubic-bezier(0.2, 0.8, 0.2, 1);
}

body.motion-ready .reveal:not(.is-visible) {
  opacity: 0;
  transform: translateY(42px);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.system-panel.reveal:nth-child(2),
.philosophy-presence.reveal {
  transition-delay: 0.12s;
}

.system-panel.reveal:nth-child(3),
.conversation-copy.reveal {
  transition-delay: 0.22s;
}

@keyframes starDrift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(120px, 80px, 0); }
}

@keyframes horizonPulse {
  0%, 100% { opacity: 0.68; transform: scaleX(0.92); filter: blur(0); }
  50% { opacity: 1; transform: scaleX(1); filter: blur(0.2px); }
}

@keyframes flareBreath {
  0%, 100% { opacity: 0.28; transform: translate(-50%, -50%) scale(0.78); }
  50% { opacity: 0.62; transform: translate(-50%, -50%) scale(1.04); }
}

@keyframes verticalSignal {
  0%, 100% { opacity: 0.36; transform: scaleY(0.72); }
  50% { opacity: 1; transform: scaleY(1.15); }
}

@keyframes slowTurn {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@media (max-width: 980px) {
  .topbar {
    left: 22px;
    right: 22px;
    top: 24px;
  }

  .hero-copy {
    padding-top: 130px;
  }

  .narrow-left {
    padding-left: 0;
  }

  .section-content {
    width: min(720px, calc(100% - 44px));
  }

  .constellation-vortex {
    right: -20vw;
    width: 78vw;
    opacity: 0.42;
  }

  .signal-map {
    right: -15vw;
    width: 70vw;
    opacity: 0.42;
  }

  .ecosystem-grid,
  .philosophy,
  .conversation {
    grid-template-columns: 1fr;
  }

  .system-panel {
    border-left: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  .system-panel:first-child {
    border-top: 0;
  }

  .philosophy-presence {
    min-height: 320px;
  }

  .philosophy-presence img {
    right: 50%;
    width: min(520px, 78vw);
    opacity: 0.32;
    transform: translate(50%, -50%);
  }

  .next-card {
    display: none;
  }
}

@media (max-width: 640px) {
  .topbar {
    left: 18px;
    right: 18px;
  }

  .top-actions {
    position: fixed;
    top: 24px;
    right: 18px;
    gap: 8px;
  }

  .brand-mini {
    width: 96px;
  }

  .menu-toggle span {
    display: none;
  }

  .menu-isotype {
    width: 24px;
    height: 24px;
  }

  .site-menu {
    left: 18px;
    right: 18px;
    top: 76px;
  }

  .lang-toggle span {
    width: 22px;
    height: 21px;
  }

  .chapter {
    min-height: 560px;
  }

  .hero {
    min-height: 100svh;
  }

  .hero-copy {
    width: min(310px, calc(100% - 36px));
    padding-top: 150px;
  }

  h1 {
    font-size: clamp(25px, 7.4vw, 29px);
    line-height: 1.22;
  }

  h1 span {
    display: inline-block;
  }

  h2 {
    font-size: clamp(31px, 10vw, 44px);
  }

  .living-horizon {
    bottom: 25%;
  }

  .problem,
  .understanding {
    min-height: 520px;
    padding: 80px 0;
  }

  .bridge {
    min-height: 360px;
  }

  .wordmark {
    margin-top: 24px;
  }

  .wordmark img {
    width: min(520px, 86vw);
  }

  .ecosystem {
    padding-top: 54px;
  }

  .system-panel {
    min-height: 300px;
  }

  .philosophy,
  .conversation {
    padding: 58px 22px;
  }

  .philosophy {
    min-height: 660px;
  }

  .philosophy-presence {
    min-height: 300px;
  }

  .conversation-eclipse {
    right: -70%;
    top: 12%;
    opacity: 0.52;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }

  body.motion-ready .reveal:not(.is-visible),
  .reveal {
    opacity: 1;
    transform: none;
  }

  .particle-field {
    display: none;
  }
}