:root {
  --lab-white: #ffffff;
  --lab-ink: #242d36;
  --lab-accent: #e6ff00;
  --lab-soft: #f5f7f8;
  --lab-muted: #62707d;
  --lab-line: rgba(36, 45, 54, 0.12);
  --lab-dark-line: rgba(255, 255, 255, 0.12);
  --max-width: 1180px;
  --header-height: 76px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--lab-white);
  color: var(--lab-ink);
  font-family: "Lato", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.58;
  letter-spacing: 0;
  overflow-x: hidden;
}

body::selection {
  background: var(--lab-accent);
  color: var(--lab-ink);
}

a {
  color: inherit;
  text-decoration-color: rgba(36, 45, 54, 0.28);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  transition: all 0.4s ease-in-out;
}

a:hover,
a:focus {
  color: var(--lab-ink);
  text-decoration-color: var(--lab-accent);
}

#lab-canvas {
  position: fixed;
  inset: 0;
  z-index: -1;
  width: 100vw;
  height: 100vh;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(245, 247, 248, 0.72));
}

.site-header {
  position: fixed;
  top: 18px;
  left: 50%;
  z-index: 10;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.5rem);
  width: min(calc(100% - 40px), var(--max-width));
  min-height: var(--header-height);
  padding: 0 clamp(1rem, 3vw, 1.6rem);
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(36, 45, 54, 0.08);
  box-shadow: 0 20px 60px rgba(36, 45, 54, 0.08);
  backdrop-filter: blur(18px);
  transform: translateX(-50%);
  transition: all 0.4s ease-in-out;
}

.site-header.is-scrolled {
  top: 12px;
  width: min(calc(100% - clamp(48px, 9vw, 160px)), var(--max-width));
  min-height: 54px;
  border-radius: 50px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  min-width: 0;
  text-decoration: none;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  color: var(--lab-ink);
  background: var(--lab-accent);
  border: 1px solid rgba(36, 45, 54, 0.16);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.brand-text {
  overflow: hidden;
  color: var(--lab-ink);
  font-size: 1rem;
  font-weight: 900;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.top-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 2vw, 1.4rem);
  color: var(--lab-muted);
  font-size: 0.88rem;
  font-weight: 700;
}

.top-nav a {
  text-decoration: none;
}

.top-nav a:hover,
.top-nav a:focus {
  color: var(--lab-ink);
}

.language-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--lab-line);
}

.language-switch button {
  min-width: 42px;
  height: 34px;
  border: 0;
  background: transparent;
  color: var(--lab-muted);
  font-family: inherit;
  font-weight: 900;
  cursor: pointer;
  transition: all 0.4s ease-in-out;
}

.language-switch button.is-active {
  background: var(--lab-ink);
  color: var(--lab-accent);
}

.hero,
.section,
.site-footer {
  width: min(calc(100% - clamp(2rem, 8vw, 7rem)), var(--max-width));
  margin: 0 auto;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(260px, 0.42fr);
  align-items: end;
  gap: clamp(2rem, 6vw, 5rem);
  min-height: 92vh;
  padding: calc(var(--header-height) + 7rem) 0 6rem;
}

.hero-inner {
  max-width: 820px;
}

.hero-statement {
  position: absolute;
  top: clamp(9rem, 24vh, 16rem);
  right: 0;
  width: min(520px, 44vw);
  margin: 0;
  color: var(--lab-ink);
  font-size: clamp(1.35rem, 2.4vw, 2.35rem);
  font-weight: 900;
  line-height: 1.12;
  text-align: right;
}

.hero-statement::after {
  content: "";
  display: block;
  width: 4.2rem;
  height: 0.38rem;
  margin: 1rem 0 0 auto;
  background: var(--lab-accent);
}

.eyebrow,
.section-kicker,
.system-state {
  margin: 0 0 1rem;
  color: var(--lab-accent);
  font-size: 0.95rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero .eyebrow,
.section:not(.section-dark) .section-kicker {
  color: var(--lab-ink);
}

.hero .eyebrow::before,
.section:not(.section-dark) .section-kicker::before {
  content: "";
  display: inline-block;
  width: 2.4rem;
  height: 0.48rem;
  margin-right: 0.7rem;
  background: var(--lab-accent);
  vertical-align: 0.1em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  color: var(--lab-ink);
  line-height: 1.05;
}

h1 {
  max-width: 860px;
  margin-bottom: 1.35rem;
  font-size: clamp(3.2rem, 7vw, 6rem);
  font-weight: 900;
}

h2 {
  max-width: 820px;
  margin-bottom: 1.5rem;
  font-size: clamp(2rem, 4.2vw, 3.4rem);
  font-weight: 900;
}

h3 {
  margin-bottom: 0.85rem;
  font-size: 1.35rem;
  font-weight: 900;
}

.hero-lead {
  max-width: 720px;
  color: var(--lab-ink);
  font-size: clamp(1.3rem, 2.2vw, 1.85rem);
  font-weight: 700;
  line-height: 1.28;
}

.hero-copy,
.section-copy,
.principle-list,
.notes,
.contact {
  color: #31404c;
}

.hero-copy {
  max-width: 680px;
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2.2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 1.15rem;
  border: 1px solid var(--lab-ink);
  font-size: 0.9rem;
  font-weight: 900;
  text-decoration: none;
}

.button-primary {
  background: var(--lab-ink);
  color: var(--lab-white);
}

.button-primary:hover,
.button-primary:focus {
  background: var(--lab-accent);
  color: var(--lab-ink);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.68);
}

.hero-status {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--lab-line);
  border-bottom: 1px solid var(--lab-line);
}

.hero-status div {
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--lab-line);
}

.hero-status div:last-child {
  border-bottom: 0;
}

.hero-status span,
.note-row > span {
  display: block;
  color: var(--lab-muted);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-status strong {
  display: block;
  margin-top: 0.22rem;
  font-size: 1.02rem;
}

.section {
  padding: clamp(4.8rem, 9vw, 7rem) 0;
  border-top: 1px solid var(--lab-line);
}

.section-split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 0.8fr);
  gap: clamp(2rem, 6vw, 5rem);
}

.section-copy {
  max-width: 620px;
  font-size: 1.08rem;
}

.section-dark {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: clamp(5rem, 9vw, 7.5rem) max(calc((100vw - var(--max-width)) / 2), clamp(1rem, 4vw, 3.5rem));
  background: linear-gradient(-15deg, rgba(36, 45, 54, 0.9) 30%, rgba(36, 45, 54, 0.97) 66%, #242d36 100%);
  color: var(--lab-white);
  border-top: 0;
}

.section-dark h2,
.section-dark h3,
.section-dark a {
  color: var(--lab-white);
}

.section-dark .section-heading {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-dark .section-kicker {
  color: var(--lab-accent);
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: var(--max-width);
  margin: 2rem auto 0;
  background: var(--lab-dark-line);
  border: 1px solid var(--lab-dark-line);
}

.system-item {
  min-height: 330px;
  padding: clamp(1.4rem, 3vw, 2rem);
  background: rgba(255, 255, 255, 0.03);
}

.system-item p:last-child {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.78);
}

.system-state {
  color: var(--lab-accent);
  font-size: 0.72rem;
}

.version-badge {
  display: inline-block;
  margin-left: 0.42rem;
  color: var(--lab-accent);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  vertical-align: 0.14em;
}

.principles .section-heading,
.notes .section-heading {
  max-width: 760px;
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 2.5rem;
  background: var(--lab-line);
  border: 1px solid var(--lab-line);
}

.principle-list div {
  min-height: 220px;
  padding: 1.45rem;
  background: rgba(255, 255, 255, 0.72);
}

.principle-list span {
  display: block;
  margin-bottom: 2.6rem;
  color: var(--lab-muted);
  font-size: 0.78rem;
  font-weight: 900;
}

.principle-list p {
  margin-bottom: 0;
  color: var(--lab-ink);
  font-size: 1.02rem;
  font-weight: 700;
}

.vsl-index2 .principle-list {
  gap: clamp(0.85rem, 2vw, 1.15rem);
  background: transparent;
  border: 0;
}

.vsl-index2 .principle-list div {
  min-height: 230px;
  padding: clamp(1.35rem, 2.4vw, 1.7rem);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--lab-line);
  border-radius: 9px;
}

.vsl-index2 .principle-list span {
  margin-bottom: clamp(1.5rem, 3vw, 2rem);
  color: var(--lab-ink);
  font-size: clamp(2rem, 3.2vw, 2.8rem);
  line-height: 1;
}

.vsl-index2 .principle-list p {
  font-size: clamp(1.02rem, 1.2vw, 1.12rem);
  line-height: 1.48;
}

.note-row {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr) auto;
  gap: clamp(1rem, 3vw, 2.2rem);
  align-items: start;
  padding: 1.7rem 0;
  border-top: 1px solid var(--lab-line);
}

.note-row:last-child {
  border-bottom: 1px solid var(--lab-line);
}

.note-row p {
  max-width: 720px;
  margin-bottom: 0;
}

.note-row a {
  font-size: 0.9rem;
  font-weight: 900;
}

.process .section-heading {
  max-width: 820px;
}

.process .section-heading p:last-child {
  max-width: 780px;
  color: #31404c;
  font-size: 1.12rem;
}

.process-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(0.85rem, 2vw, 1.15rem);
  margin-top: 2.5rem;
}

.process-flow div {
  min-height: 150px;
  padding: clamp(1.25rem, 2.2vw, 1.55rem);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--lab-line);
  border-radius: 9px;
}

.process-flow span {
  display: block;
  margin-bottom: 1.4rem;
  color: var(--lab-ink);
  font-size: clamp(2rem, 3vw, 2.65rem);
  font-weight: 900;
  line-height: 1;
}

.process-flow p {
  margin-bottom: 0;
  color: var(--lab-ink);
  font-size: 1.02rem;
  font-weight: 900;
  line-height: 1.35;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(280px, 0.7fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: end;
}

.contact-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--lab-line);
  border: 1px solid var(--lab-line);
}

.contact-links a {
  min-height: 64px;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.74);
  font-weight: 900;
  text-decoration: none;
}

.contact-links a:hover,
.contact-links a:focus {
  background: var(--lab-accent);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 2rem 0;
  border-top: 1px solid var(--lab-line);
  color: var(--lab-muted);
  font-size: 0.92rem;
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .top-nav {
    display: none;
  }

  .hero,
  .section-split,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: calc(var(--header-height) + 6rem);
  }

  .hero-status {
    max-width: 620px;
  }

  .hero-statement {
    top: clamp(8rem, 22vh, 13rem);
    right: 0;
    width: min(430px, 46vw);
    font-size: clamp(1.15rem, 2.2vw, 1.65rem);
  }

  .system-grid,
  .principle-list,
  .process-flow {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 680px) {
  :root {
    --header-height: 66px;
  }

  body {
    font-size: 16px;
  }

  .site-header,
  .site-header.is-scrolled {
    top: 10px;
    width: min(calc(100% - 20px), var(--max-width));
    min-height: var(--header-height);
    border-radius: 0;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .brand-text {
    max-width: 155px;
  }

  .language-switch button {
    min-width: 36px;
  }

  .hero,
  .section,
  .site-footer {
    width: min(calc(100% - 1.6rem), var(--max-width));
  }

  .hero {
    padding-bottom: 4rem;
  }

  .hero-statement {
    position: static;
    width: min(100%, 620px);
    margin: 0 0 2rem;
    text-align: left;
  }

  .hero-statement::after {
    margin-left: 0;
  }

  .section {
    padding: 4rem 0;
  }

  .section-dark {
    width: 100%;
    padding: 4.5rem 0.8rem;
  }

  .system-grid,
  .principle-list,
  .process-flow,
  .contact-links,
  .note-row {
    grid-template-columns: 1fr;
  }

  .system-item,
  .principle-list div,
  .process-flow div {
    min-height: auto;
  }

  .note-row {
    gap: 0.7rem;
  }

  .site-footer {
    flex-direction: column;
  }
}