.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: var(--header-height);
  background: rgba(250, 250, 247, 0.9);
  border-bottom: 1px solid rgba(34, 42, 38, 0.08);
  backdrop-filter: blur(16px) saturate(118%);
}

.site-header-inner {
  width: min(100% - 40px, 1360px);
  min-height: var(--header-height);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 1.04rem;
  font-weight: 760;
}

.brand-mark {
  width: auto;
  min-width: 0;
  height: auto;
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: var(--primary-dark);
  font-weight: 820;
  overflow: visible;
}

.brand-logo {
  width: auto;
  height: 38px;
  max-width: 204px;
  object-fit: contain;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

.site-nav a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 12px;
  border-radius: var(--radius);
  color: #29312d;
  font-size: 0.9rem;
  font-weight: 680;
  white-space: nowrap;
  transition: color 180ms ease, background 180ms ease, transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: rgba(34, 42, 38, 0.06);
  color: #111814;
  outline: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  transform: translateY(-1px);
}

.site-nav a.is-active {
  background: #1d2923;
  color: #fbfaf5;
  font-weight: 700;
  box-shadow: none;
}

.site-nav a[data-section="account"] {
  color: rgba(31, 41, 55, 0.78);
}

.site-nav a[data-section="activate"] {
  padding-inline: 15px;
  color: #26342e;
  font-weight: 700;
}

.site-nav a[data-section="activate"]:hover,
.site-nav a[data-section="activate"]:focus-visible {
  color: #111814;
}

.header-utility {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex: 0 0 auto;
  margin-left: 2px;
  padding-left: 16px;
  border-left: 1px solid rgba(34, 42, 38, 0.1);
}

.header-entry-link {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(216, 95, 24, 0.22);
  background: #fff4ec;
  color: #7c3505;
  font-size: 0.9rem;
  font-weight: 720;
  white-space: nowrap;
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.header-tool-link {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 13px;
  border: 1px solid rgba(34, 42, 38, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 252, 0.86);
  color: #26342e;
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.header-tool-link:hover,
.header-tool-link:focus-visible {
  background: #f2f4ef;
  border-color: rgba(34, 42, 38, 0.2);
  color: #111814;
  outline: none;
  transform: translateY(-1px);
}

.header-tool-link.primary {
  border-color: var(--primary);
  background: var(--primary);
  color: #fbfaf5;
  box-shadow: 0 10px 22px rgba(255, 106, 0, 0.18);
}

.header-tool-link.primary:hover,
.header-tool-link.primary:focus-visible {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #ffffff;
}

.header-entry-link:hover,
.header-entry-link:focus-visible {
  background: #ffe0c6;
  border-color: rgba(216, 95, 24, 0.34);
  color: #5e2a00;
  outline: none;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(216, 95, 24, 0.16);
}

.header-tool-link.account-icon-link {
  width: 38px;
  padding: 0;
  color: #d85f18;
}

.header-tool-link.account-icon-link svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.9;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.header-tool-link.account-icon-link:hover,
.header-tool-link.account-icon-link:focus-visible {
  border-color: rgba(216, 95, 24, 0.26);
  background: #fff8f2;
  color: #b94800;
}

.language-switch {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0 12px;
  border: 1px solid rgba(34, 42, 38, 0.1);
  border-radius: var(--radius);
  background: rgba(255, 255, 252, 0.78);
  box-shadow: none;
  color: rgba(38, 52, 46, 0.72);
  font-size: 0.86rem;
  font-weight: 720;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.language-switch:hover,
.language-switch:focus-visible {
  border-color: rgba(34, 42, 38, 0.2);
  background: #f2f4ef;
  color: #111814;
  outline: none;
  transform: translateY(-1px);
}

.language-option {
  color: rgba(38, 52, 46, 0.62);
  transition: color 180ms ease;
}

.language-option.is-active {
  color: var(--primary);
  font-weight: 820;
}

.language-divider {
  color: rgba(38, 52, 46, 0.24);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid rgba(34, 42, 38, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 252, 0.82);
  box-shadow: none;
  color: #26342e;
  font-weight: 720;
}

.main-content {
  flex: 1;
}

.container {
  width: min(100% - 32px, var(--container));
  margin: 0 auto;
}

.section {
  padding: 82px 0;
}

.section.compact {
  padding: 52px 0;
}

.section.patent-strip {
  padding-top: 16px;
  padding-bottom: 12px;
}

.section.alt {
  background: rgba(255, 255, 255, 0.78);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section.mint {
  background:
    linear-gradient(126deg, rgba(255, 106, 0, 0.14), transparent 34%),
    linear-gradient(238deg, rgba(0, 183, 232, 0.13), transparent 34%),
    linear-gradient(180deg, #f6fbfd, #ffffff);
}

.section-header {
  max-width: 760px;
  margin-bottom: 30px;
}

.section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.hero {
  padding: 92px 0 68px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(330px, 0.96fr);
  align-items: center;
  gap: 54px;
}

.hero-copy {
  max-width: 690px;
}

.hero-text {
  max-width: 630px;
  color: var(--ink-soft);
  font-size: 1.1rem;
}

.hero-note {
  color: var(--muted);
  font-size: 0.98rem;
}

.hero-actions,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.grid {
  display: grid;
  gap: 18px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

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

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: 34px;
  align-items: start;
}

.about-hero {
  padding: 86px 0 92px;
}

.about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(360px, 0.82fr);
  align-items: center;
  gap: 48px;
}

.about-hero-copy {
  max-width: 680px;
}

.about-hero-copy h1 {
  max-width: 620px;
  margin-bottom: 34px;
  font-size: clamp(3rem, 4.75vw, 4.06rem);
}

.about-lead {
  max-width: 740px;
  margin-bottom: 20px;
  color: var(--ink-soft);
  font-size: 1.18rem;
  line-height: 1.78;
  font-weight: 560;
}

.about-hero-copy p:not(.about-lead) {
  max-width: 740px;
  color: var(--ink-soft);
  font-size: 1.02rem;
  line-height: 1.86;
}

.about-hero-copy p,
.about-emphasis {
  overflow-wrap: break-word;
}

.about-copy-section {
  max-width: 760px;
  margin-top: 42px;
}

.about-copy-section h2 {
  margin-bottom: 14px;
  color: var(--ink);
  font-size: 1.42rem;
  line-height: 1.24;
  font-weight: 780;
}

.about-copy-section p {
  margin-bottom: 12px;
}

.about-emphasis {
  margin-top: 44px;
  margin-bottom: 0;
  color: var(--primary-dark);
  font-size: 1.22rem;
  line-height: 1.55;
  font-weight: 780;
}

.about-brand-panel {
  min-height: 430px;
  display: grid;
  align-content: space-between;
  gap: 26px;
  padding: 28px;
  border: 1px solid rgba(220, 231, 238, 0.86);
  border-radius: var(--radius);
  background:
    linear-gradient(152deg, rgba(255, 106, 0, 0.11), transparent 46%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(245, 251, 253, 0.92));
  box-shadow: var(--shadow-soft);
}

.about-veduca-logo {
  width: min(260px, 100%);
  height: auto;
}

.about-brand-panel p {
  max-width: 280px;
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

.about-brand-device {
  min-height: 220px;
  display: grid;
  place-items: center;
  padding: 18px;
  border: 1px solid rgba(186, 213, 223, 0.72);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
}

.about-brand-device img {
  width: min(210px, 72%);
  height: auto;
  filter: drop-shadow(0 18px 30px rgba(7, 19, 29, 0.14));
}

.about-vlingo-system-card {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 26px;
  padding: 30px;
  border: 1px solid rgba(186, 213, 223, 0.72);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 20% 8%, rgba(255, 106, 0, 0.13), transparent 26%),
    linear-gradient(145deg, #ffffff 0%, #f4fbfd 58%, #fff8f2 100%);
  box-shadow: var(--shadow-soft);
}

.about-system-heading {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 4px;
}

.about-system-heading strong {
  color: var(--ink);
  font-size: clamp(2.15rem, 5vw, 3.45rem);
  line-height: 1;
  font-weight: 860;
}

.about-system-heading span {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 680;
}

.about-system-visual {
  position: relative;
  min-height: 330px;
  display: grid;
  align-items: center;
  justify-items: center;
  padding: 22px 8px 12px;
}

.about-learning-preview {
  position: absolute;
  right: 4px;
  top: 6px;
  width: min(46%, 210px);
  min-height: 168px;
  padding: 18px;
  border: 1px solid rgba(186, 213, 223, 0.72);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 18px 38px rgba(7, 19, 29, 0.08);
}

.about-learning-preview span {
  display: block;
  margin-bottom: 20px;
  color: var(--primary-dark);
  font-size: 0.74rem;
  font-weight: 820;
  text-transform: uppercase;
}

.about-learning-preview strong {
  display: block;
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.2;
}

.about-learning-preview p {
  margin: 7px 0 18px;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.42;
}

.about-learning-preview div {
  display: grid;
  gap: 7px;
}

.about-learning-preview i {
  display: block;
  height: 7px;
  border-radius: 999px;
  background: rgba(255, 106, 0, 0.16);
}

.about-learning-preview i:nth-child(2) {
  width: 72%;
  background: rgba(0, 183, 232, 0.14);
}

.about-learning-preview i:nth-child(3) {
  width: 48%;
  background: rgba(7, 19, 29, 0.1);
}

.about-system-device {
  position: relative;
  z-index: 2;
  width: min(92%, 420px);
  height: auto;
  margin-top: 24px;
  filter: drop-shadow(0 30px 42px rgba(7, 19, 29, 0.21));
}

.about-system-caption {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 5px;
  padding-top: 4px;
}

.about-system-caption p {
  margin: 0;
  color: var(--ink);
  font-size: 0.98rem;
  font-weight: 760;
  line-height: 1.45;
}

.about-system-caption span {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.45;
}

.about-brand-attribution {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid rgba(186, 213, 223, 0.56);
  color: rgba(101, 113, 127, 0.86);
  font-size: 0.76rem;
  line-height: 1.45;
}

.about-brand-attribution .about-veduca-logo {
  flex: 0 0 auto;
  width: 74px;
  opacity: 0.62;
}

.about-story {
  padding-top: 72px;
}

.about-story-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.about-story-card {
  min-height: 100%;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 18px 48px rgba(7, 19, 29, 0.07);
}

.about-story-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.about-principles-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(280px, 0.62fr);
  align-items: start;
  gap: 44px;
}

.about-principles-inner p {
  max-width: 820px;
  color: var(--ink-soft);
  font-size: 1.04rem;
  line-height: 1.86;
}

.about-principle-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.about-principle-list li {
  margin: 0;
  padding: 13px 15px;
  border: 1px solid rgba(255, 192, 143, 0.62);
  border-radius: var(--radius-sm);
  background: #fff8f3;
  color: var(--primary-dark);
  font-size: 1rem;
  font-weight: 720;
  line-height: 1.45;
}

.about-closing {
  padding: 78px 0 86px;
}

.about-closing-inner {
  max-width: 880px;
}

.about-closing-inner > p:first-child {
  margin-bottom: 10px;
  color: var(--primary-dark);
  font-size: 0.95rem;
  font-weight: 760;
}

.about-closing-inner h2 {
  max-width: 760px;
}

.about-closing-inner > p:last-child {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
  line-height: 1.8;
}

.site-footer {
  padding: 16px 0 14px;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
  background: #fbfcfd;
  color: #6b7280;
}

.site-footer-dark {
  background: transparent;
  border-top-color: rgba(255, 255, 255, 0.24);
  color: rgba(255, 255, 255, 0.85);
}

.footer-inner {
  width: min(100% - 32px, 1180px);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.footer-main {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 36px;
  flex-wrap: nowrap;
}

.footer-brand {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.footer-brand:hover,
.footer-brand:focus-visible {
  outline: none;
}

.footer-brand-copy {
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
  flex: 1 1 auto;
  flex-wrap: wrap;
}

.footer-brand-note {
  margin: 0;
  color: #4b5563;
  font-size: 0.8rem;
  line-height: 1.35;
  font-weight: 620;
  white-space: nowrap;
}

.footer-links {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  margin-left: auto;
  padding: 0;
  justify-content: flex-end;
  flex-wrap: nowrap;
}

.footer-links a {
  color: #6b7280;
  font-size: 0.78rem;
  font-weight: 520;
  text-decoration: none;
  line-height: 1.4;
  transition: color 180ms ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: #e36b1f;
  outline: none;
}

.footer-separator {
  color: rgba(107, 114, 128, 0.38);
  font-size: 0.76rem;
  line-height: 1;
}

.site-footer-dark .footer-brand-note {
  color: rgba(255, 255, 255, 0.85);
}

.site-footer-dark .footer-links a {
  color: rgba(255, 255, 255, 0.84);
}

.site-footer-dark .footer-links a:hover,
.site-footer-dark .footer-links a:focus-visible {
  color: #fff;
}

.site-footer-dark .footer-separator {
  color: rgba(255, 255, 255, 0.5);
}

.site-footer-dark .footer-legal {
  color: rgba(255, 255, 255, 0.68);
}

.site-footer-dark .footer-patent .patent-note {
  color: rgba(255, 255, 255, 0.68);
}

.footer-logo {
  height: 16px;
  width: auto;
  display: block;
  align-self: center;
  margin-top: 0;
  margin-bottom: 0;
}

.footer-copyright-logo {
  height: 30px;
  width: auto;
  display: block;
  align-self: center;
  margin-top: 0;
  margin-bottom: 0;
}

.footer-legal {
  margin-top: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 14px;
  width: 100%;
  justify-content: flex-end;
  text-align: right;
  color: rgba(75, 85, 99, 0.68);
  font-size: 0.72rem;
  line-height: 1.35;
  letter-spacing: 0;
  align-self: center;
}

.footer-patent {
  width: 100%;
  margin-top: 2px;
  justify-self: end;
  text-align: right;
}

.footer-patent .patent-note {
  margin: 0;
  max-width: 100%;
  background: transparent;
  border-left: 0;
  padding: 0;
  font-size: 0.74rem;
  line-height: 1.36;
  color: rgba(75, 85, 99, 0.68);
}

.footer-patent .patent-note strong {
  color: #4b5563;
  font-size: 0.78rem;
}