:root {
  --ink: #071117;
  --ink-soft: #0d1a21;
  --navy: #10263f;
  --teal: #0b6b68;
  --teal-light: #8ed8d0;
  --snow: #f5f7f6;
  --ice: #dbe4e5;
  --white: #ffffff;
  --muted: #718087;
  --line-dark: rgba(255,255,255,.13);
  --line-light: rgba(7,17,23,.13);
  --container: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--snow);
  font-family: "DM Sans", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
section { scroll-margin-top: 95px; }
.container { width: min(calc(100% - 48px), var(--container)); margin: 0 auto; }
.section-dark { color: var(--white); background: var(--ink); }

h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 {
  font-family: "Cormorant Garamond", Georgia, serif;
  font-weight: 500;
  letter-spacing: -.035em;
}
h1 em, h2 em { color: var(--teal-light); font-weight: 500; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--teal);
  font-size: .66rem;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
}
.eyebrow i { width: 22px; height: 1px; background: currentColor; }
.eyebrow.light { color: var(--teal-light); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 12px 0;
  margin-bottom: -92px;
  transition: padding .3s ease, background .3s ease;
}
.site-header.scrolled {
  padding: 7px 0;
  background: rgba(7,17,23,.82);
  backdrop-filter: blur(16px);
}
.nav-wrap {
  position: relative;
  min-height: 68px;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 9px 10px 9px 12px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 18px;
  background: rgba(7,17,23,.76);
  backdrop-filter: blur(18px);
  box-shadow: 0 16px 48px rgba(0,0,0,.18), inset 0 1px 0 rgba(255,255,255,.06);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  margin-right: auto;
}
.brand-symbol {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 5px;
  border-radius: 12px 12px 12px 4px;
  background: var(--white);
}
.brand-symbol img { width: 100%; height: 100%; object-fit: contain; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { color: var(--white); font-size: .8rem; letter-spacing: .18em; }
.brand-text small { margin-top: 4px; color: #8da0a9; font-size: .53rem; letter-spacing: .12em; text-transform: uppercase; }

.main-nav {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 4px;
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 12px;
  background: rgba(255,255,255,.055);
}
.main-nav a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0 15px;
  border-radius: 9px;
  color: #c4ced2;
  font-size: .76rem;
  font-weight: 500;
  transition: color .2s ease, background .2s ease, box-shadow .2s ease;
}
.main-nav a span { color: #62747d; font-size: .51rem; font-weight: 600; }
.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--ink);
  background: var(--white);
  box-shadow: 0 5px 18px rgba(0,0,0,.18);
}
.main-nav a:hover span,
.main-nav a[aria-current="page"] span { color: var(--teal); }

.nav-cta {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  gap: 18px;
  padding: 0 7px 0 17px;
  border-radius: 12px;
  color: var(--ink);
  background: var(--white);
  font-size: .76rem;
  font-weight: 600;
  transition: transform .2s ease, box-shadow .2s ease;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(0,0,0,.24); }
.nav-cta-arrow {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  color: var(--white);
  background: var(--teal);
  font-size: 1rem;
}

.menu-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  min-height: 42px;
  padding: 0 12px;
  color: var(--white);
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 11px;
  background: rgba(255,255,255,.07);
  cursor: pointer;
}
.menu-toggle-label { font-size: .72rem; font-weight: 600; }
.menu-toggle-icon { width: 18px; display: grid; gap: 5px; }
.menu-toggle-icon i { width: 18px; height: 1px; background: currentColor; transition: transform .2s ease; }
.menu-toggle[aria-expanded="true"] .menu-toggle-icon i:first-child { transform: translateY(3px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle-icon i:last-child { transform: translateY(-3px) rotate(-45deg); }

.hero {
  position: relative;
  min-height: 625px;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 20% 10%, rgba(20,54,66,.55), transparent 35%),
    linear-gradient(135deg, #071117 0%, #0a171e 58%, #050b0f 100%);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  opacity: .16;
  background-image:
    linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: linear-gradient(to bottom, transparent, black 40%, transparent);
}
.hero-grid {
  min-height: 625px;
  display: grid;
  grid-template-columns: 1.02fr .82fr;
  align-items: center;
  gap: clamp(48px, 7vw, 100px);
  padding-top: 102px;
  padding-bottom: 18px;
}
.hero-copy { position: relative; z-index: 3; }
.hero-copy h1 {
  max-width: 700px;
  margin: 20px 0 25px;
  color: var(--white);
  font-size: clamp(3rem, 5.5vw, 5.15rem);
  line-height: .96;
}
.hero-lead { max-width: 630px; margin-bottom: 25px; color: #aab8be; font-size: 1rem; line-height: 1.7; }
.hero-actions { display: flex; align-items: center; gap: 25px; flex-wrap: wrap; }
.btn {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: .78rem;
  font-weight: 600;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-light { color: var(--ink); background: var(--white); }
.btn-light:hover { background: var(--teal-light); }
.btn-dark { color: var(--white); background: var(--ink); }
.btn-dark:hover { background: var(--teal); }
.text-link { color: #d7dfe2; font-size: .78rem; font-weight: 500; }
.text-link span { display: inline-block; margin-left: 7px; transition: transform .2s ease; }
.text-link:hover span { transform: translateY(3px); }
.trust-line { display: flex; flex-wrap: wrap; gap: 0; margin-top: 28px; }
.trust-line span { color: #788a92; font-size: .62rem; letter-spacing: .12em; text-transform: uppercase; }
.trust-line span:not(:last-child)::after { content: "/"; margin: 0 15px; color: #34464e; }

.hero-media {
  position: relative;
  width: min(100%, 540px);
  height: 445px;
  margin: 0 0 0 auto;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 4px;
  box-shadow: 0 45px 90px rgba(0,0,0,.36);
  transform: translate3d(var(--media-x, 0), var(--media-y, 0), 0);
  transition: transform .5s cubic-bezier(.2,.7,.2,1);
}
.hero-media::before {
  content: "";
  position: absolute;
  inset: 17px;
  z-index: 3;
  pointer-events: none;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 1px;
}
.hero-media img { width: 100%; height: 100%; object-fit: cover; object-position: 52% center; filter: saturate(.62) contrast(1.08); }
.hero-media-shade { position: absolute; inset: 0; background: linear-gradient(to top, rgba(3,9,13,.9), transparent 55%); }
.hero-media figcaption { position: absolute; z-index: 4; left: 38px; right: 38px; bottom: 36px; }
.hero-media figcaption span { display: block; margin-bottom: 7px; color: var(--teal-light); font-size: .58rem; letter-spacing: .2em; }
.hero-media figcaption strong { max-width: 300px; display: block; font-family: "Cormorant Garamond", Georgia, serif; font-size: 1.7rem; font-weight: 500; line-height: 1.1; }
.hero-media-index { position: absolute; z-index: 4; top: 38px; right: 37px; color: rgba(255,255,255,.65); font-size: .56rem; letter-spacing: .14em; }
.hero-coordinate { position: absolute; z-index: 4; left: 22px; bottom: 68px; color: #43565f; font-size: .54rem; letter-spacing: .18em; transform: rotate(-90deg); transform-origin: left bottom; }

.hero-mist { position: absolute; inset: 0; z-index: 2; pointer-events: none; overflow: hidden; opacity: .52; }
.hero-mist span { position: absolute; height: 130px; border-radius: 50%; background: rgba(220,231,232,.13); filter: blur(34px); animation: mist-drift 18s ease-in-out infinite alternate; }
.hero-mist span:nth-child(1) { width: 58%; left: -12%; bottom: 6%; }
.hero-mist span:nth-child(2) { width: 48%; right: -8%; bottom: 21%; animation-delay: -6s; animation-duration: 23s; }
.hero-mist span:nth-child(3) { width: 34%; left: 33%; top: 27%; opacity: .45; animation-delay: -11s; }
@keyframes mist-drift {
  from { transform: translate3d(-6%, 8px, 0) scaleX(.92); }
  to { transform: translate3d(14%, -10px, 0) scaleX(1.12); }
}

.services {
  position: relative;
  overflow: hidden;
  padding: 28px 0 42px;
  background: #091318;
}
.services::after {
  content: "";
  position: absolute;
  z-index: 0;
  left: 0;
  right: 0;
  bottom: -12%;
  height: 72%;
  opacity: .2;
  background:
    linear-gradient(to bottom, #091318 0%, rgba(9,19,24,.78) 28%, rgba(9,19,24,.18) 100%),
    url("Zocial_Hack_Imagenes_Web/cta_montanas_premium.png") center 44% / cover no-repeat;
  filter: grayscale(.55) saturate(.6);
  mask-image: linear-gradient(to bottom, transparent 0%, black 38%, black 100%);
  pointer-events: none;
}
.services > .container { position: relative; z-index: 2; }
.services-mist { position: absolute; inset: 0; z-index: 1; overflow: hidden; pointer-events: none; }
.services-mist span {
  position: absolute;
  width: 52%;
  height: 160px;
  border-radius: 50%;
  background: rgba(210,226,227,.12);
  filter: blur(34px);
  animation: services-fog 21s ease-in-out infinite alternate;
}
.services-mist span:nth-child(1) { left: -24%; top: 27%; }
.services-mist span:nth-child(2) { right: -20%; top: 52%; animation-delay: -8s; animation-duration: 26s; }
.services-mist span:nth-child(3) { left: 23%; bottom: -45px; width: 64%; animation-delay: -14s; animation-duration: 29s; }
@keyframes services-fog {
  from { transform: translate3d(-8%, 0, 0) scaleX(.9); opacity: .45; }
  to { transform: translate3d(18%, -18px, 0) scaleX(1.18); opacity: .9; }
}
.section-intro, .research-heading {
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 40px;
  align-items: start;
  margin-bottom: 14px;
}
.section-intro h2, .research-heading h2 {
  margin: 8px 0 0;
  font-size: clamp(2.2rem, 3vw, 3rem);
  line-height: .94;
}
.section-intro h2 { color: var(--white); }
.section-intro h2 em { color: inherit; }
.section-intro > p { max-width: 430px; margin: 24px 0 0; color: #8fa0a7; font-size: .94rem; line-height: 1.7; }

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.service-card {
  --mx: 50%;
  --my: 50%;
  position: relative;
  min-height: 164px;
  overflow: hidden;
  padding: 17px 18px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 3px;
  background:
    radial-gradient(circle at var(--mx) var(--my), rgba(142,216,208,.13), transparent 35%),
    rgba(9,19,24,.7);
  transition: transform .35s ease, border-color .35s ease, background .35s ease;
}
.service-card::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  background: linear-gradient(110deg, transparent 30%, rgba(255,255,255,.055), transparent 70%);
  transform: translateX(-100%);
}
.service-card:hover { z-index: 2; transform: translateY(-3px); box-shadow: 0 14px 35px rgba(0,0,0,.2); }
.service-card:hover::before { opacity: 1; animation: card-scan 1.25s ease; }
@keyframes card-scan { to { transform: translateX(100%); } }
.service-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.service-top span { color: var(--teal-light); font-family: "Cormorant Garamond", Georgia, serif; font-size: 1.2rem; }
.service-top small { color: #60727a; font-size: .56rem; letter-spacing: .2em; }
.service-card h3 { max-width: 350px; margin-bottom: 7px; color: var(--white); font-size: 1.28rem; line-height: 1.08; }
.service-card p { max-width: 350px; margin: 0; padding-right: 24px; color: #87989f; font-size: .71rem; line-height: 1.55; }
.service-signal { position: absolute; right: 16px; bottom: 15px; display: flex; align-items: end; gap: 3px; height: 18px; }
.service-signal i { width: 2px; height: 7px; background: #405158; transition: height .3s ease, background .3s ease; }
.service-signal i:nth-child(2) { height: 13px; }
.service-signal i:nth-child(3) { height: 16px; }
.service-signal i:nth-child(4) { height: 20px; }
.service-card:hover .service-signal i { background: var(--teal-light); animation: signal 1s ease-in-out infinite alternate; }
.service-card:hover .service-signal i:nth-child(2) { animation-delay: -.2s; }
.service-card:hover .service-signal i:nth-child(3) { animation-delay: -.4s; }
.service-card:hover .service-signal i:nth-child(4) { animation-delay: -.6s; }
@keyframes signal { to { height: 7px; opacity: .45; } }

.about {
  padding: 34px 0 20px;
  color: var(--ink);
  background: var(--white);
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}
.about-heading { max-width: 850px; }
.about-heading h2 {
  margin: 8px 0 0;
  color: var(--navy);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(2.35rem, 3.6vw, 3.35rem);
  line-height: .98;
}
.about-heading h2 em { color: inherit; }
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: clamp(48px, 7vw, 88px);
  align-items: start;
  margin-top: 18px;
}
.about-copy { max-width: 660px; }
.about-copy p {
  margin-bottom: 12px;
  color: #5f6f76;
  font-size: .9rem;
  line-height: 1.65;
}
.about-copy p:first-child { font-size: .96rem; }
.about-copy p:last-child { margin-bottom: 0; }
.founder-block {
  margin-top: -66px;
  padding: 0 0 0 48px;
  border-left: 1px solid rgba(11,107,104,.24);
}
.founder-label {
  display: block;
  margin-bottom: 14px;
  color: #7b8a90;
  font-size: .56rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
}
.founder-block h3 {
  margin-bottom: 2px;
  color: var(--navy);
  font-size: 2.25rem;
  line-height: 1;
}
.founder-role {
  display: block;
  margin-bottom: 12px;
  color: var(--teal);
  font-size: .64rem;
  font-weight: 600;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.founder-block > p {
  margin-bottom: 18px;
  color: #68777d;
  font-size: .84rem;
  line-height: 1.75;
}
.founder-block blockquote {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid rgba(7,17,23,.1);
  color: var(--navy);
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.42rem;
  font-style: italic;
  line-height: 1.35;
}
.founder-block.reveal { transition-delay: .1s; }

.research { padding: 42px 0 26px; background: var(--snow); }
.research-heading { margin-bottom: 28px; color: var(--ink); }
.research-heading h2 { margin-top: 12px; line-height: 1; }
.research-heading h2 em { color: inherit; }
.research-heading > p { max-width: 440px; margin: 24px 0 0; color: #65747b; font-size: .94rem; line-height: 1.7; }
.research-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; align-items: stretch; }
.research-card { display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line-light); background: var(--white); transition: transform .35s ease, box-shadow .35s ease; }
.research-card:hover { transform: translateY(-8px); box-shadow: 0 28px 60px rgba(7,17,23,.1); }
.research-image { height: 205px; flex: 0 0 auto; overflow: hidden; background: #ccd5d8; }
.research-image img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.55) contrast(1.06); transition: transform .7s ease, filter .7s ease; }
.research-card:hover .research-image img { transform: scale(1.055); filter: saturate(.85) contrast(1.04); }
.research-content { flex: 1; display: flex; flex-direction: column; padding: 24px 26px 22px; }
.research-meta { margin-bottom: 24px; color: var(--teal); font-size: .56rem; font-weight: 600; letter-spacing: .15em; }
.research-card h3 { margin-bottom: 13px; color: var(--ink); font-size: 1.68rem; line-height: 1.08; }
.research-card p { margin-bottom: 22px; color: #6d7b81; font-size: .78rem; line-height: 1.65; }
.research-card .research-question {
  margin-bottom: 16px;
  color: #24363e;
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.04rem;
  font-style: italic;
  line-height: 1.35;
}
.research-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 3px 0 22px;
  padding-top: 17px;
  border-top: 1px solid rgba(7,17,23,.09);
}
.research-topics span {
  padding: 5px 8px;
  border: 1px solid rgba(11,107,104,.16);
  border-radius: 999px;
  color: #52646b;
  background: rgba(11,107,104,.035);
  font-size: .57rem;
  letter-spacing: .03em;
}
.research-status { display: flex; align-items: center; gap: 8px; margin-top: auto; color: #44555c; font-size: .65rem; }
.research-status i { width: 6px; height: 6px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 5px rgba(11,107,104,.1); }

.contact { padding: 0; background: var(--snow); }
.mountain-card { position: relative; min-height: 320px; overflow: hidden; border: 1px solid rgba(7,17,23,.1); background: #dfe7e8; }
.mountain-card > img {
  position: absolute;
  inset: -3%;
  width: 106%;
  height: 106%;
  object-fit: cover;
  object-position: center;
  filter: saturate(.72) contrast(1.08);
  will-change: transform;
  animation: mountain-depth 16s ease-in-out infinite alternate;
}
.mountain-overlay { position: absolute; z-index: 1; inset: 0; background: linear-gradient(90deg, rgba(246,248,247,.98) 0%, rgba(246,248,247,.92) 38%, rgba(246,248,247,.36) 58%, rgba(246,248,247,.04) 100%); }
.mountain-card::before {
  content: "";
  position: absolute;
  z-index: 2;
  left: -42%;
  bottom: -24%;
  width: 180%;
  height: 88%;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 16% 55%, rgba(218,228,230,.94) 0 12%, rgba(225,234,235,.62) 30%, transparent 58%),
    radial-gradient(ellipse at 52% 46%, rgba(245,248,248,.95) 0 15%, rgba(202,215,218,.5) 37%, transparent 63%),
    radial-gradient(ellipse at 86% 62%, rgba(215,226,228,.88) 0 11%, rgba(235,241,242,.42) 34%, transparent 59%);
  filter: blur(13px);
  opacity: .88;
  will-change: transform, opacity;
  animation: mountain-fog-front 9s ease-in-out infinite alternate;
}
.mountain-card::after {
  content: "";
  position: absolute;
  z-index: 2;
  left: -38%;
  top: 16%;
  width: 170%;
  height: 44%;
  pointer-events: none;
  border-radius: 50%;
  background: linear-gradient(90deg, transparent 0%, rgba(194,209,213,.28) 12%, rgba(248,250,250,.82) 38%, rgba(199,214,217,.38) 68%, transparent 100%);
  filter: blur(17px);
  opacity: .78;
  will-change: transform, opacity;
  animation: mountain-fog-back 13s ease-in-out infinite alternate;
}
@keyframes mountain-depth {
  from { transform: translate3d(-1.2%, 0, 0) scale(1.015); }
  to { transform: translate3d(1.2%, -.8%, 0) scale(1.055); }
}
@keyframes mountain-fog-front {
  from { transform: translate3d(-13%, 7px, 0) scaleX(.92); opacity: .64; }
  to { transform: translate3d(14%, -10px, 0) scaleX(1.08); opacity: .94; }
}
@keyframes mountain-fog-back {
  from { transform: translate3d(12%, -2px, 0) scaleX(1.06); opacity: .48; }
  to { transform: translate3d(-14%, 10px, 0) scaleX(.9); opacity: .86; }
}
.contact-copy { position: relative; z-index: 3; max-width: 555px; padding: 36px 48px; }
.contact-copy h2 { margin: 12px 0 12px; font-size: clamp(2.7rem, 4.2vw, 4rem); line-height: .95; }
.contact-copy > p { max-width: 470px; margin-bottom: 28px; color: #5f6e74; font-size: .9rem; }
.contact-actions { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }

.site-footer { padding: 45px 0; color: #a5b2b7; background: var(--ink); border-top: 1px solid rgba(255,255,255,.09); }
.footer-grid { display: grid; grid-template-columns: 1fr 1fr auto 1fr; align-items: center; gap: 30px; }
.footer-brand { width: 150px; height: 74px; display: block; overflow: hidden; }
.footer-brand img { width: 100%; height: 100%; object-fit: contain; filter: brightness(0) invert(1); opacity: .78; }
.footer-grid > p { margin: 0; text-align: center; color: #77888f; font-family: "Cormorant Garamond", Georgia, serif; font-size: 1.04rem; line-height: 1.35; }
.social-links { display: flex; align-items: center; gap: 8px; }
.social-link {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 50%;
  color: #a5b2b7;
  background: rgba(255,255,255,.025);
  font-size: .92rem;
  transition: color .2s ease, border-color .2s ease, background .2s ease, transform .2s ease;
}
.social-link:hover { color: var(--white); border-color: rgba(142,216,208,.55); background: rgba(142,216,208,.08); transform: translateY(-2px); }
.footer-end { display: grid; justify-items: end; gap: 5px; color: #607178; font-size: .61rem; letter-spacing: .08em; text-transform: uppercase; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .75s ease, transform .75s cubic-bezier(.2,.7,.2,1); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.service-card:nth-child(2), .research-card:nth-child(2) { transition-delay: .08s; }
.service-card:nth-child(3), .research-card:nth-child(3) { transition-delay: .16s; }
.service-card:nth-child(4) { transition-delay: .24s; }
.service-card:nth-child(5) { transition-delay: .32s; }
.service-card:nth-child(6) { transition-delay: .4s; }

@media (max-width: 1020px) {
  .desktop-cta { display: none; }
  .menu-toggle { display: inline-flex; }
  .main-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 8px;
    right: 8px;
    display: none;
    align-items: stretch;
    flex-direction: column;
    padding: 8px;
    border-color: rgba(255,255,255,.14);
    border-radius: 14px;
    background: rgba(7,17,23,.98);
    box-shadow: 0 25px 55px rgba(0,0,0,.35);
  }
  .main-nav.open { display: flex; }
  .main-nav a { min-height: 48px; justify-content: space-between; font-size: .84rem; }
  .main-nav a span { order: 2; }
  .hero-grid { grid-template-columns: 1fr 440px; gap: 45px; }
  .hero-copy h1 { font-size: clamp(3rem, 6vw, 4.5rem); }
  .section-intro, .research-heading { grid-template-columns: 1fr; gap: 30px; }
  .about-grid { gap: 55px; }
  .founder-block { margin-top: 0; }
  .research-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .container { width: min(calc(100% - 28px), var(--container)); }
  .site-header { padding: 8px 0; margin-bottom: -76px; }
  .nav-wrap { min-height: 60px; padding: 7px 8px 7px 10px; border-radius: 14px; }
  .brand-symbol { width: 40px; height: 40px; }
  .brand-text small { display: none; }
  .hero { min-height: auto; }
  .hero-grid { min-height: auto; grid-template-columns: 1fr; padding-top: 135px; padding-bottom: 75px; }
  .hero-copy h1 { max-width: 580px; font-size: clamp(2.75rem, 13vw, 4rem); }
  .hero-lead { font-size: .94rem; }
  .trust-line { margin-top: 45px; row-gap: 10px; }
  .hero-media { width: 100%; height: 470px; margin: 15px 0 0; border-radius: 3px; }
  .hero-coordinate { display: none; }
  .services { padding: 36px 0 42px; }
  .about { padding: 38px 0 24px; }
  .about-heading h2 { font-size: clamp(2.4rem, 10vw, 3.2rem); }
  .about-grid { grid-template-columns: 1fr; gap: 22px; margin-top: 22px; }
  .founder-block { padding: 24px 0 0; border-top: 1px solid rgba(11,107,104,.24); border-left: 0; }
  .founder-label { margin-bottom: 10px; }
  .research { padding: 42px 0 26px; }
  .section-intro { margin-bottom: 18px; }
  .research-heading { margin-bottom: 26px; }
  .section-intro h2, .research-heading h2 { font-size: clamp(2.3rem, 9.5vw, 3.1rem); }
  .service-grid, .research-grid { grid-template-columns: 1fr; }
  .service-card { min-height: 170px; padding: 20px; }
  .service-top { margin-bottom: 18px; }
  .research-image { height: 220px; min-height: 0; }
  .contact { padding-bottom: 0; }
  .mountain-card { min-height: 420px; }
  .mountain-overlay { background: linear-gradient(90deg, rgba(246,248,247,.96), rgba(246,248,247,.76)); }
  .mountain-card > img { object-position: 58% center; }
  .contact-copy { padding: 36px 28px; }
  .footer-grid { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .footer-end { justify-items: center; }
}

@media (max-width: 460px) {
  .brand-text strong { font-size: .7rem; letter-spacing: .12em; }
  .menu-toggle-label { display: none; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 18px; }
  .btn { width: 100%; }
  .hero-media { height: 450px; }
  .hero-media figcaption { left: 28px; right: 28px; bottom: 28px; }
  .hero-media figcaption strong { font-size: 1.45rem; }
  .contact-actions { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}