:root {
  color-scheme: dark;
  --os-bg: #050b14;
  --os-bg-deep: #02060c;
  --os-surface: #0b1929;
  --os-surface-raised: #10243a;
  --os-surface-soft: #142d47;
  --os-border: rgba(148, 193, 225, 0.2);
  --os-border-strong: rgba(103, 232, 249, 0.42);
  --os-text: #e6edf7;
  --os-muted: #adbed0;
  --os-accent: #38bdf8;
  --os-accent-light: #67e8f9;
  --os-accent-ink: #03131f;
  --os-warm: #fbbf24;
  --os-focus: #fde68a;
  --os-danger: #f87171;
  --os-content: 76rem;
  --os-wide: 94rem;
  --os-radius: 1.25rem;
  --os-shadow: 0 28px 80px rgba(0, 0, 0, 0.36);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  min-width: 19rem;
  margin: 0;
  color: var(--os-text);
  background:
    radial-gradient(circle at 7% 3%, rgba(56, 189, 248, 0.13), transparent 31rem),
    radial-gradient(circle at 95% 25%, rgba(103, 232, 249, 0.08), transparent 33rem),
    var(--os-bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

body::before {
  position: absolute;
  z-index: -1;
  top: 17rem;
  left: -25rem;
  width: 51rem;
  height: 51rem;
  border: 1px solid rgba(56, 189, 248, 0.07);
  border-radius: 50%;
  box-shadow:
    0 0 0 8rem rgba(56, 189, 248, 0.014),
    0 0 0 16rem rgba(56, 189, 248, 0.009);
  content: "";
  pointer-events: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--os-accent-light);
  text-underline-offset: 0.18em;
}

a:hover {
  color: #b6f5ff;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--os-focus);
  outline-offset: 4px;
}

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

h1,
h2,
h3 {
  color: #f4f8fd;
  font-weight: 720;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

h1 {
  max-width: 9ch;
  margin-bottom: 1.35rem;
  font-size: clamp(3.6rem, 8vw, 7rem);
}

h2 {
  margin-bottom: 1.2rem;
  font-size: clamp(2.35rem, 5vw, 4.35rem);
}

h3 {
  margin-bottom: 0.8rem;
  font-size: 1.3rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 5000;
  top: 0.7rem;
  left: 0.7rem;
  padding: 0.7rem 1rem;
  color: var(--os-accent-ink);
  border-radius: 0.5rem;
  background: var(--os-focus);
  font-weight: 750;
  text-decoration: none;
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 1000;
  top: 0;
  border-bottom: 1px solid var(--os-border);
  background: rgba(5, 11, 20, 0.9);
  backdrop-filter: blur(18px);
}

.site-nav {
  display: flex;
  width: min(calc(100% - 2.5rem), var(--os-content));
  min-height: 5rem;
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.wordmark {
  display: block;
  width: 10.6rem;
  flex: 0 0 auto;
}

.wordmark img {
  width: 100%;
  height: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.85rem, 2vw, 1.55rem);
}

.nav-links a {
  color: var(--os-muted);
  font-size: 0.88rem;
  font-weight: 680;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--os-text);
}

.nav-links .nav-contact {
  padding: 0.5rem 0.85rem;
  color: var(--os-text);
  border: 1px solid var(--os-border-strong);
  border-radius: 999px;
}

.nav-links .nav-contact:hover {
  color: var(--os-accent-ink);
  border-color: var(--os-accent-light);
  background: var(--os-accent-light);
}

.nav-toggle {
  display: none;
  width: 2.8rem;
  height: 2.8rem;
  padding: 0.62rem;
  border: 1px solid var(--os-border-strong);
  border-radius: 0.55rem;
  background: var(--os-surface);
  cursor: pointer;
}

.nav-toggle > span:not(.sr-only) {
  display: block;
  height: 2px;
  margin: 0.27rem 0;
  border-radius: 2px;
  background: var(--os-text);
}

.hero,
.section,
.site-footer {
  width: min(calc(100% - 2.5rem), var(--os-content));
  margin: 0 auto;
}

.hero {
  display: grid;
  min-height: min(55rem, calc(100vh - 5rem));
  padding: clamp(5rem, 9vw, 8.5rem) 0;
  align-items: center;
  grid-template-columns: minmax(0, 1.04fr) minmax(27rem, 0.96fr);
  gap: clamp(3.5rem, 8vw, 7.5rem);
}

.eyebrow {
  margin-bottom: 0.9rem;
  color: var(--os-accent-light);
  font-size: 0.77rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero-lead {
  max-width: 42rem;
  margin-bottom: 2rem;
  color: var(--os-muted);
  font-size: clamp(1.13rem, 2vw, 1.35rem);
  line-height: 1.6;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.button {
  display: inline-flex;
  min-height: 3rem;
  padding: 0.72rem 1.1rem;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 0.65rem;
  font-size: 0.92rem;
  font-weight: 760;
  text-align: center;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--os-accent-ink);
  border-color: var(--os-accent-light);
  background: var(--os-accent-light);
}

.button-primary:hover {
  color: var(--os-accent-ink);
  background: #a5f3fc;
}

.button-secondary {
  color: var(--os-text);
  border-color: var(--os-border-strong);
  background: rgba(11, 25, 41, 0.65);
}

.button-secondary:hover {
  color: var(--os-text);
  border-color: var(--os-accent-light);
  background: var(--os-surface-raised);
}

.hero-facts {
  display: grid;
  margin: 3.2rem 0 0;
  padding: 1.25rem 0 0;
  border-top: 1px solid var(--os-border);
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  list-style: none;
}

.hero-facts strong,
.hero-facts span {
  display: block;
}

.hero-facts strong {
  color: var(--os-text);
  font-size: 0.83rem;
}

.hero-facts span {
  margin-top: 0.18rem;
  color: var(--os-muted);
  font-size: 0.72rem;
  line-height: 1.35;
}

.hero-video-card {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--os-border-strong);
  border-radius: 1.5rem;
  background: var(--os-bg-deep);
  box-shadow: var(--os-shadow);
  transform: none;
}

.hero-video-card iframe {
  position: absolute;
  width: 100%;
  height: 100%;
  border: 0;
  inset: 0;
}

.section {
  padding: clamp(5.5rem, 10vw, 9rem) 0;
  border-top: 1px solid var(--os-border);
}

.section-heading {
  max-width: 51rem;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-heading > p:last-child,
.workflow-copy > p,
.tutorial-copy > p,
.science-intro > p,
.r-copy > p,
.partner-lead > p,
.contact-section > div:first-child > p:last-child {
  color: var(--os-muted);
  font-size: 1.08rem;
}

.card-grid {
  display: grid;
  gap: 1rem;
}

.card-grid-three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid-four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.path-card,
.value-card,
.publication-card {
  border: 1px solid var(--os-border);
  border-radius: var(--os-radius);
  background: linear-gradient(155deg, rgba(16, 36, 58, 0.72), rgba(5, 11, 20, 0.9));
}

.path-card {
  display: flex;
  min-height: 29rem;
  padding: clamp(1.5rem, 3vw, 2.15rem);
  flex-direction: column;
}

.partner-card {
  border-color: rgba(251, 191, 36, 0.34);
  background: linear-gradient(155deg, rgba(75, 56, 17, 0.32), rgba(5, 11, 20, 0.92));
}

.card-number {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: auto;
  place-items: center;
  color: var(--os-accent-light);
  border: 1px solid var(--os-border-strong);
  border-radius: 50%;
  font-size: 0.73rem;
  font-weight: 850;
}

.card-kicker {
  margin: 2.6rem 0 0.55rem;
  color: var(--os-muted);
  font-size: 0.74rem;
  font-weight: 780;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.path-card > p:not(.card-kicker) {
  margin-bottom: 1.55rem;
  color: var(--os-muted);
  font-size: 0.93rem;
}

.link-stack {
  display: flex;
  margin-top: auto;
  flex-direction: column;
}

.link-stack a {
  display: flex;
  padding: 0.65rem 0;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  color: var(--os-text);
  border-bottom: 1px solid var(--os-border);
  font-size: 0.89rem;
  font-weight: 680;
  text-decoration: none;
}

.link-stack a:last-child {
  border-bottom: 0;
}

.link-stack a:hover {
  color: var(--os-accent-light);
}

.app-section {
  width: min(calc(100% - clamp(0.5rem, 3vw, 2.5rem)), var(--os-wide));
}

.app-intro {
  display: flex;
  margin-bottom: 2.2rem;
  align-items: end;
  justify-content: space-between;
  gap: 3rem;
}

.app-intro > p {
  max-width: 36rem;
  margin-bottom: 0.7rem;
  color: var(--os-muted);
  font-size: 1.04rem;
}

.app-shell {
  overflow: hidden;
  border: 1px solid var(--os-border-strong);
  border-radius: var(--os-radius);
  background: #07111d;
  box-shadow: var(--os-shadow);
}

.app-toolbar {
  display: flex;
  min-height: 4.35rem;
  padding: 0.75rem 0.9rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--os-border);
  background: var(--os-surface-raised);
}

.app-heading {
  display: flex;
  min-width: 0;
  align-items: baseline;
  gap: 0.8rem;
}

.app-heading strong {
  color: var(--os-text);
  font-size: 0.92rem;
  white-space: nowrap;
}

#openspecy-app-status {
  color: var(--os-muted);
  font-size: 0.8rem;
}

.app-actions {
  display: flex;
  flex: 0 0 auto;
  gap: 0.5rem;
}

.toolbar-button {
  display: inline-flex;
  min-height: 2.4rem;
  padding: 0.43rem 0.78rem;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 0.52rem;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 750;
  text-decoration: none;
  cursor: pointer;
}

.toolbar-button-secondary {
  color: var(--os-text);
  border-color: var(--os-border-strong);
  background: transparent;
}

.toolbar-button-secondary:hover {
  color: var(--os-text);
  border-color: var(--os-accent-light);
  background: rgba(56, 189, 248, 0.08);
}

.toolbar-button-primary {
  color: var(--os-accent-ink);
  border-color: var(--os-accent-light);
  background: var(--os-accent-light);
}

.toolbar-button-primary:disabled {
  color: var(--os-muted);
  border-color: var(--os-border);
  background: var(--os-surface-soft);
  cursor: wait;
  opacity: 0.78;
}

.app-viewport {
  position: relative;
  height: min(76vh, 800px);
  min-height: 540px;
  background: #07111d;
}

#openspecy-app-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #07111d;
}

.app-loading {
  position: absolute;
  z-index: 2;
  inset: 0;
  display: grid;
  padding: 2rem;
  place-items: center;
  background:
    radial-gradient(circle at 50% 35%, rgba(56, 189, 248, 0.12), transparent 20rem),
    #07111d;
  opacity: 1;
  visibility: visible;
  transition: opacity 180ms ease, visibility 180ms ease;
}

.app-loading-content {
  width: min(100%, 32rem);
  color: var(--os-muted);
  text-align: center;
}

.app-loading-title {
  margin-bottom: 0.75rem;
  color: var(--os-text);
  font-size: 1.13rem;
  font-weight: 750;
}

.app-progress {
  position: relative;
  height: 0.52rem;
  margin: 0 auto 1rem;
  overflow: hidden;
  border-radius: 999px;
  background: var(--os-surface-soft);
}

.app-progress span {
  position: absolute;
  inset: 0 auto 0 0;
  width: 38%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--os-accent), var(--os-accent-light));
  animation: app-progress 1.35s ease-in-out infinite;
}

.app-shell.is-ready .app-loading {
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
}

.app-shell.is-ready #openspecy-app-status {
  color: #a7f3d0;
}

html.openspecy-app-fullscreen-open,
html.openspecy-app-fullscreen-open body {
  overflow: hidden;
}

.app-shell.is-fullscreen {
  position: fixed;
  z-index: 3000;
  inset: 0;
  display: flex;
  width: auto;
  height: auto;
  margin: 0;
  border: 0;
  border-radius: 0;
  flex-direction: column;
}

.app-shell.is-fullscreen .app-viewport {
  height: auto;
  min-height: 0;
  flex: 1 1 auto;
}

.app-note,
.notice {
  max-width: 72rem;
  margin: 1.15rem auto 0;
  color: var(--os-muted);
  font-size: 0.86rem;
  text-align: center;
}

.workflow-section,
.tutorial-section,
.science-section,
.r-section,
.partners-section,
.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(27rem, 1.12fr);
  gap: clamp(3.2rem, 8vw, 7rem);
}

.science-note {
  padding: 1.1rem 1.2rem;
  color: var(--os-muted) !important;
  border: 1px solid rgba(251, 191, 36, 0.28);
  border-radius: 0.8rem;
  background: rgba(251, 191, 36, 0.055);
  font-size: 0.9rem !important;
}

.workflow-list {
  margin: 0;
  padding: 0;
  counter-reset: workflow;
  list-style: none;
}

.workflow-list li {
  position: relative;
  display: grid;
  min-height: 6.6rem;
  padding: 1.25rem 0 1.25rem 4.8rem;
  border-top: 1px solid var(--os-border);
  grid-template-columns: 7rem 1fr;
  gap: 1rem;
  counter-increment: workflow;
}

.workflow-list li:last-child {
  border-bottom: 1px solid var(--os-border);
}

.workflow-list li::before {
  position: absolute;
  top: 1.1rem;
  left: 0;
  display: grid;
  width: 2.8rem;
  height: 2.8rem;
  place-items: center;
  color: var(--os-accent-light);
  border: 1px solid var(--os-border-strong);
  border-radius: 50%;
  font-size: 0.71rem;
  font-weight: 850;
  content: "0" counter(workflow);
}

.workflow-list span {
  color: var(--os-text);
  font-weight: 760;
}

.workflow-list p {
  margin: 0;
  color: var(--os-muted);
  font-size: 0.91rem;
}

.tutorial-section {
  align-items: center;
}

.tutorial-links {
  max-width: 31rem;
  margin-top: 2rem;
}

.video-card {
  overflow: hidden;
  border: 1px solid var(--os-border-strong);
  border-radius: var(--os-radius);
  background: var(--os-surface);
  box-shadow: var(--os-shadow);
}

.video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--os-bg-deep);
}

.video-frame iframe {
  position: absolute;
  width: 100%;
  height: 100%;
  border: 0;
  inset: 0;
}

.video-load {
  position: absolute;
  inset: 0;
  display: grid;
  width: 100%;
  padding: 2rem;
  place-content: center;
  justify-items: center;
  color: var(--os-text);
  border: 0;
  background:
    radial-gradient(circle at 50% 42%, rgba(56, 189, 248, 0.18), transparent 11rem),
    linear-gradient(145deg, #07111d, #10243a);
  cursor: pointer;
  text-align: center;
}

.video-load::after {
  position: absolute;
  inset: 1rem;
  border: 1px solid rgba(56, 189, 248, 0.18);
  border-radius: calc(var(--os-radius) - 0.45rem);
  content: "";
  pointer-events: none;
}

.video-load:hover,
.video-load:focus-visible {
  background:
    radial-gradient(circle at 50% 42%, rgba(56, 189, 248, 0.3), transparent 12rem),
    linear-gradient(145deg, #07111d, #10243a);
}

.video-load:focus-visible {
  outline: 3px solid var(--os-accent-warm);
  outline-offset: -5px;
}

.video-load strong {
  margin-top: 1rem;
  font-size: clamp(1rem, 2vw, 1.35rem);
}

.video-load > span:last-child {
  margin-top: 0.4rem;
  color: var(--os-muted);
  font-size: 0.82rem;
}

.video-play {
  display: grid;
  width: 4rem;
  height: 4rem;
  padding-left: 0.2rem;
  place-items: center;
  color: #03121e;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--os-accent-light), var(--os-accent));
  box-shadow: 0 0 0 0.55rem rgba(56, 189, 248, 0.12);
  font-size: 1.4rem;
}

.video-frame noscript {
  display: grid;
  height: 100%;
  padding: 2rem;
  place-items: center;
  text-align: center;
}

.video-card > p {
  margin: 0;
  padding: 0.85rem 1rem;
  color: var(--os-muted);
  border-top: 1px solid var(--os-border);
  font-size: 0.8rem;
  text-align: center;
}

.value-card {
  min-height: 14rem;
  padding: 1.5rem;
}

.value-card::before {
  display: block;
  width: 2.2rem;
  height: 0.2rem;
  margin-bottom: 2.3rem;
  border-radius: 999px;
  background: var(--os-accent);
  content: "";
}

.value-card p {
  margin-bottom: 0;
  color: var(--os-muted);
  font-size: 0.88rem;
}

.science-section {
  align-items: start;
}

.publication-list {
  display: grid;
  gap: 1rem;
}

.publication-card {
  padding: clamp(1.5rem, 4vw, 2.2rem);
}

.publication-year {
  margin-bottom: 0.7rem;
  color: var(--os-accent-light);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.publication-card h3 {
  font-size: 1.2rem;
  line-height: 1.3;
}

.publication-card > p:not(.publication-year) {
  color: var(--os-muted);
  font-size: 0.86rem;
}

.publication-card > a {
  font-size: 0.86rem;
  font-weight: 700;
}

.r-section {
  align-items: center;
}

.r-copy .link-stack {
  max-width: 31rem;
  margin-top: 2rem;
}

.code-card {
  overflow: hidden;
  border: 1px solid var(--os-border-strong);
  border-radius: var(--os-radius);
  background: var(--os-bg-deep);
  box-shadow: var(--os-shadow);
}

.code-card-label {
  padding: 0.7rem 1.25rem;
  color: var(--os-muted);
  border-bottom: 1px solid var(--os-border);
  background: var(--os-surface);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.code-card pre {
  margin: 0;
  padding: clamp(1.5rem, 5vw, 3rem);
  overflow-x: auto;
  color: var(--os-accent-light);
  font-size: clamp(0.92rem, 2vw, 1.08rem);
  line-height: 1.8;
}

.code-card > p {
  margin: 0;
  padding: 0.9rem 1.25rem;
  color: var(--os-muted);
  border-top: 1px solid var(--os-border);
  background: rgba(11, 25, 41, 0.64);
  font-size: 0.8rem;
}

.partners-section {
  grid-template-columns: minmax(0, 0.75fr) minmax(29rem, 1.25fr);
}

.partner-lead .button-row {
  margin: 2rem 0;
}

.partner-actions {
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.partner-actions li {
  padding: 0.6rem 0 0.6rem 1.25rem;
  border-top: 1px solid var(--os-border);
}

.partner-actions li::before {
  float: left;
  margin-left: -1.25rem;
  color: var(--os-accent-light);
  content: "+";
}

.partner-actions a {
  color: var(--os-muted);
  font-size: 0.88rem;
  text-decoration: none;
}

.partner-actions a:hover {
  color: var(--os-text);
}

.partner-roll {
  padding: clamp(1.4rem, 4vw, 2.4rem);
  border: 1px solid var(--os-border);
  border-radius: var(--os-radius);
  background: linear-gradient(155deg, rgba(16, 36, 58, 0.78), rgba(5, 11, 20, 0.92));
}

.partner-featured {
  padding: 1.35rem;
  border: 1px solid rgba(251, 191, 36, 0.32);
  border-radius: 0.9rem;
  background: rgba(251, 191, 36, 0.055);
}

.tier-label {
  display: flex;
  margin-bottom: 1rem;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  color: var(--os-warm);
  font-weight: 760;
}

.tier-label span {
  color: var(--os-muted);
  font-size: 0.72rem;
  font-weight: 600;
}

.partner-featured ul {
  display: grid;
  margin-bottom: 0;
  padding-left: 1.15rem;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem 1.6rem;
}

.partner-featured li {
  font-size: 0.86rem;
}

.partner-roll details {
  margin-top: 1rem;
  border-top: 1px solid var(--os-border);
}

.partner-roll summary {
  padding-top: 1rem;
  color: var(--os-accent-light);
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 720;
}

.partner-details {
  display: grid;
  padding-top: 1.25rem;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.partner-details h3 {
  color: var(--os-accent-light);
  font-size: 1rem;
}

.partner-details p {
  color: var(--os-muted);
  font-size: 0.77rem;
  line-height: 1.55;
}

.contact-section {
  grid-template-columns: minmax(18rem, 0.7fr) minmax(0, 1.3fr);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.contact-grid > a {
  display: flex;
  min-height: 9rem;
  padding: 1.25rem;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.3rem;
  color: var(--os-text);
  border: 1px solid var(--os-border);
  border-radius: 0.9rem;
  background: rgba(11, 25, 41, 0.64);
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.contact-grid > a:hover {
  color: var(--os-text);
  border-color: var(--os-border-strong);
  background: var(--os-surface-raised);
  transform: translateY(-2px);
}

.contact-grid strong,
.contact-grid span {
  display: block;
}

.contact-grid span {
  color: var(--os-muted);
  font-size: 0.84rem;
}

.site-footer {
  display: flex;
  padding: 3rem 0 4.5rem;
  align-items: start;
  justify-content: space-between;
  gap: 2rem;
  border-top: 1px solid var(--os-border);
}

.footer-mark {
  color: var(--os-text);
  font-size: 1.08rem;
  font-weight: 780;
  text-decoration: none;
}

.site-footer p {
  margin: 0.25rem 0 0;
  color: var(--os-muted);
  font-size: 0.82rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.65rem 1.2rem;
}

.site-footer nav a {
  color: var(--os-muted);
  font-size: 0.82rem;
  text-decoration: none;
}

.site-footer nav a:hover {
  color: var(--os-text);
}

@keyframes app-progress {
  0% { transform: translateX(-105%); }
  55% { transform: translateX(165%); }
  100% { transform: translateX(270%); }
}

@media (max-width: 1080px) {
  .nav-links {
    gap: 0.85rem;
  }

  .nav-links a {
    font-size: 0.82rem;
  }

  .hero {
    grid-template-columns: 1fr 0.85fr;
    gap: 3.5rem;
  }

  .card-grid-four {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .js .nav-toggle {
    display: block;
  }

  .site-nav {
    position: relative;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .js .nav-links {
    position: absolute;
    top: calc(100% - 0.2rem);
    right: 0;
    display: none;
    width: min(21rem, calc(100vw - 2.5rem));
    padding: 0.65rem;
    align-items: stretch;
    border: 1px solid var(--os-border-strong);
    border-radius: 0.8rem;
    background: rgba(11, 25, 41, 0.98);
    box-shadow: var(--os-shadow);
  }

  .js .nav-links[data-open="true"] {
    display: flex;
    flex-direction: column;
  }

  .js .nav-links a {
    padding: 0.65rem 0.75rem;
  }

  .js .nav-links .nav-contact {
    border-radius: 0.45rem;
  }

  .hero,
  .workflow-section,
  .tutorial-section,
  .science-section,
  .r-section,
  .partners-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-video-card {
    width: min(100%, 39rem);
    margin: 0 auto;
    transform: none;
  }

  .card-grid-three {
    grid-template-columns: 1fr;
  }

  .path-card {
    min-height: 0;
  }

  .card-number {
    margin-bottom: 1rem;
  }

  .card-kicker {
    margin-top: 1.3rem;
  }

  .app-intro {
    display: block;
  }

  .science-section,
  .partners-section,
  .contact-section {
    gap: 3rem;
  }
}

@media (max-width: 600px) {
  html {
    scroll-behavior: auto;
  }

  .site-nav,
  .hero,
  .section,
  .site-footer {
    width: calc(100% - 1.5rem);
  }

  .site-nav {
    min-height: 4.5rem;
  }

  .wordmark {
    width: 8.5rem;
  }

  .hero {
    padding-top: 4.5rem;
    gap: 3.5rem;
  }

  h1 {
    font-size: clamp(3.2rem, 18vw, 4.5rem);
  }

  .button-row,
  .button-row .button {
    width: 100%;
  }

  .hero-facts,
  .card-grid-four,
  .contact-grid,
  .partner-featured ul,
  .partner-details {
    grid-template-columns: 1fr;
  }

  .hero-facts li {
    padding-bottom: 0.7rem;
    border-bottom: 1px solid var(--os-border);
  }

  .hero-video-card {
    border-radius: 1rem;
  }

  .section {
    padding: 5rem 0;
  }

  .app-section {
    width: calc(100% - 0.5rem);
  }

  .app-toolbar,
  .app-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .app-toolbar,
  .app-heading {
    gap: 0.5rem;
  }

  .app-actions,
  .app-actions > * {
    flex: 1 1 0;
  }

  .app-viewport {
    height: 72vh;
    min-height: 440px;
  }

  .workflow-list li {
    padding-left: 4rem;
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .tier-label,
  .site-footer {
    align-items: start;
    flex-direction: column;
  }

  .site-footer nav {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button,
  .contact-grid > a,
  .app-loading {
    transition: none;
  }

  .button:hover,
  .contact-grid > a:hover {
    transform: none;
  }

  .app-progress span {
    width: 100%;
    animation: none;
  }
}