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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: linear-gradient(175deg, oklch(98% 0.012 236) 0%, var(--color-bg) 48%, oklch(96% 0.018 230) 100%);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.68;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
}

a {
  color: inherit;
}

.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
  opacity: 0.56;
}

.ambient::before {
  content: "";
  position: absolute;
  inset: -18% -6%;
  background:
    radial-gradient(circle at 13% 21%, oklch(90% 0.05 240 / 0.8), transparent 48%),
    radial-gradient(circle at 87% 17%, oklch(91% 0.04 210 / 0.72), transparent 42%),
    radial-gradient(circle at 73% 72%, oklch(89% 0.05 255 / 0.44), transparent 46%);
}

.ambient img {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
  transform: scale(1.08);
}

.topbar {
  width: var(--container);
  margin: 1.05rem auto 0;
  padding: 0.72rem 1rem;
  border: var(--line);
  border-radius: 1rem;
  background: color-mix(in oklch, var(--color-surface), white 38%);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  position: sticky;
  top: 0.8rem;
  z-index: 30;
  box-shadow: var(--shadow-card);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.62rem;
  text-decoration: none;
  font: 700 var(--text-sm) / 1.2 var(--font-display);
  letter-spacing: 0.04em;
}

.brand-accent {
  border-radius: 99px;
  border: 1px solid color-mix(in oklch, var(--color-primary), white 45%);
  padding: 0.18rem 0.5rem;
  color: var(--color-primary);
  font-size: var(--text-xs);
}

.topnav {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.topnav a {
  text-decoration: none;
  color: var(--color-text-soft);
  font-size: var(--text-sm);
}

.topnav a:hover,
.topnav a:focus-visible {
  color: var(--color-primary);
}

.lang-switch {
  display: inline-flex;
  background: color-mix(in oklch, var(--color-primary-soft), white 55%);
  border-radius: 999px;
  padding: 0.18rem;
  border: var(--line);
}

.lang-btn {
  border: 0;
  background: transparent;
  color: var(--color-text-soft);
  min-width: 2rem;
  min-height: 1.9rem;
  border-radius: 999px;
  font: 700 0.78rem/1 var(--font-display);
  cursor: pointer;
}

.lang-btn.is-active {
  background: var(--color-primary);
  color: oklch(98% 0.01 250);
}

main {
  width: var(--container);
  margin: 0 auto;
}

.section {
  padding: var(--space-7) 0;
  scroll-margin-top: 6.2rem;
}

.hero {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1.45fr 1fr;
  align-items: start;
}

.card {
  border: var(--line);
  border-radius: var(--radius-md);
  background: color-mix(in oklch, var(--color-surface), white 56%);
}

.hero-main {
  padding: var(--space-5);
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.hero-main::after {
  content: "";
  position: absolute;
  inset: auto -18% -60% 25%;
  height: 70%;
  background: radial-gradient(ellipse at center, oklch(84% 0.06 235 / 0.56), transparent 70%);
  pointer-events: none;
}

.hero-kicker {
  margin: 0;
  font: 700 var(--text-xs) / 1.2 var(--font-display);
  letter-spacing: 0.16em;
  color: var(--color-primary);
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: -0.015em;
}

.hero h1 {
  margin-top: var(--space-3);
  font-size: var(--text-2xl);
  line-height: 1.12;
  max-width: 20ch;
}

.hero-lead {
  margin-top: var(--space-3);
  max-width: 62ch;
  color: var(--color-text-soft);
}

.hero-ai-focus {
  margin-top: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  background: color-mix(in oklch, var(--color-primary-soft), white 62%);
}

.hero-ai-title {
  margin: 0;
  font: 700 var(--text-xs) / 1.2 var(--font-display);
  letter-spacing: 0.12em;
  color: var(--color-primary-strong);
  text-transform: uppercase;
}

.hero-ai-list {
  margin: 0.7rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.hero-ai-list li {
  position: relative;
  padding-left: 0.92rem;
  color: color-mix(in oklch, var(--color-text), var(--color-primary) 22%);
  font-weight: 600;
}

.hero-ai-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.52em;
  width: 0.38rem;
  height: 0.38rem;
  border-radius: 99px;
  background: color-mix(in oklch, var(--color-primary), white 12%);
}

.hero-proof {
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-2);
}

.hero-proof li {
  border-left: 2px solid color-mix(in oklch, var(--color-primary), white 42%);
  padding-left: var(--space-2);
  color: color-mix(in oklch, var(--color-text), var(--color-primary) 20%);
  font-weight: 500;
}

.cta-row {
  margin-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.btn {
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.42rem;
  padding: 0.65rem 1rem;
  text-decoration: none;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: var(--text-sm);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    color-mix(in oklch, var(--color-primary), white 10%),
    color-mix(in oklch, var(--color-primary-strong), black 5%)
  );
  color: oklch(98% 0.01 245);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  transform: translateY(-1px);
}

.btn-secondary {
  border-color: color-mix(in oklch, var(--color-primary-soft), var(--color-primary) 25%);
  color: var(--color-primary-strong);
  background: color-mix(in oklch, var(--color-primary-soft), white 70%);
}

.hero-side {
  display: grid;
  gap: var(--space-2);
  grid-template-columns: minmax(0, 1fr);
}

.hero-photo {
  margin: 0;
  overflow: hidden;
}

.hero-photo img {
  width: 100%;
  height: clamp(240px, 28vw, 330px);
  object-fit: cover;
  display: block;
}

.hero-photo figcaption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  padding: 0.62rem 0.8rem 0.72rem;
  border-top: var(--line);
  font-size: var(--text-xs);
  color: var(--color-text-soft);
}

.hero-photo figcaption a {
  color: var(--color-primary-strong);
  font-weight: 600;
  text-decoration: none;
}

.metric {
  padding: var(--space-3);
  min-height: 138px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.metric-value {
  margin: 0;
  font: 800 clamp(1.85rem, 1.45rem + 1.2vw, 2.5rem) / 1 var(--font-display);
  font-variant-numeric: tabular-nums;
  color: var(--color-primary-strong);
}

.metric-label {
  margin: 0.42rem 0 0;
  color: var(--color-text-soft);
  font-size: var(--text-sm);
}

.hero-contact {
  padding: var(--space-3);
  display: grid;
  gap: 0.5rem;
}

.tiny-label {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font: 700 var(--text-xs) / 1.2 var(--font-display);
  color: var(--color-text-soft);
}

.hero-contact a {
  color: var(--color-primary-strong);
  text-decoration: none;
  font-weight: 600;
  word-break: break-word;
}

.section-head {
  margin-bottom: var(--space-4);
  max-width: 76ch;
}

.section-index {
  margin: 0 0 0.35rem;
  font: 700 var(--text-xs) / 1 var(--font-display);
  color: var(--color-primary);
  letter-spacing: 0.12em;
}

.section-head h2 {
  font-size: var(--text-xl);
}

.section-head p {
  margin: 0.75rem 0 0;
  color: var(--color-text-soft);
}

.thesis-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
}

.thesis-card {
  padding: var(--space-3);
  border: var(--line);
  border-radius: var(--radius-sm);
  background: color-mix(in oklch, var(--color-surface), white 52%);
}

.thesis-card:nth-child(1) {
  grid-column: span 2;
}

.thesis-card h3 {
  font-size: clamp(1.04rem, 0.95rem + 0.28vw, 1.24rem);
}

.thesis-card p {
  margin: 0.58rem 0 0;
  color: var(--color-text-soft);
}

.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-3);
}

.timeline-item {
  position: relative;
  padding: var(--space-3);
  border: var(--line);
  border-radius: var(--radius-sm);
  background: color-mix(in oklch, var(--color-surface), white 54%);
}

.timeline-year {
  margin: 0;
  font: 700 var(--text-xs) / 1 var(--font-display);
  letter-spacing: 0.1em;
  color: var(--color-primary);
}

.timeline-item h3 {
  margin-top: 0.5rem;
  font-size: var(--text-lg);
}

.timeline-org {
  margin: 0.2rem 0 0;
  color: color-mix(in oklch, var(--color-text), var(--color-primary) 14%);
  font-weight: 600;
}

.timeline-impact {
  margin: 0.6rem 0 0;
  color: var(--color-text-soft);
}

.source-ref {
  margin-top: 0.72rem;
}

.source-ref a {
  font: 600 var(--text-xs) / 1.2 var(--font-display);
  color: var(--color-primary-strong);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in oklch, var(--color-primary), white 60%);
}

.legend {
  margin-top: var(--space-2);
  display: inline-flex;
  gap: 0.45rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  font: 700 var(--text-xs) / 1 var(--font-display);
  letter-spacing: 0.06em;
  padding: 0.35rem 0.54rem;
}

.tag-fact {
  color: oklch(97% 0.01 220);
  background: color-mix(in oklch, var(--color-fact), black 8%);
}

.tag-inference {
  color: oklch(97% 0.01 20);
  background: color-mix(in oklch, var(--color-inference), black 8%);
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.ai-card {
  padding: var(--space-3);
  border: var(--line);
  border-radius: var(--radius-sm);
  background: color-mix(in oklch, var(--color-surface), white 55%);
}

.ai-card .tag {
  margin-bottom: 0.7rem;
}

.ai-card h3 {
  font-size: var(--text-lg);
}

.ai-card p {
  margin: 0.58rem 0 0;
  color: var(--color-text-soft);
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
}

.evidence-card {
  display: grid;
  gap: 0.5rem;
  padding: var(--space-3);
  border: var(--line);
  border-radius: var(--radius-sm);
  background: color-mix(in oklch, var(--color-surface), white 54%);
}

.evidence-type {
  margin: 0;
  color: var(--color-text-soft);
  font: 700 var(--text-xs) / 1.1 var(--font-display);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.evidence-card a {
  text-decoration: none;
  color: var(--color-primary-strong);
  font-weight: 600;
  line-height: 1.4;
}

.evidence-note {
  margin: 0;
  color: var(--color-text-soft);
  font-size: var(--text-xs);
}

.contact {
  padding-bottom: var(--space-7);
}

.contact-panel {
  border: var(--line);
  border-radius: var(--radius-lg);
  background: color-mix(in oklch, var(--color-surface), white 45%);
  padding: var(--space-5);
  box-shadow: var(--shadow-soft);
}

.contact-actions {
  margin-top: var(--space-3);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.footer {
  width: var(--container);
  margin: 0 auto;
  padding: 0 0 var(--space-5);
}

.footer p {
  margin: 0;
  color: var(--color-text-soft);
  font-size: var(--text-sm);
  border-top: var(--line);
  padding-top: var(--space-2);
}

.noscript-note {
  width: var(--container);
  margin: 0 auto var(--space-4);
  border: var(--line);
  border-radius: var(--radius-sm);
  background: color-mix(in oklch, var(--color-surface), white 62%);
  padding: var(--space-2);
  color: var(--color-text-soft);
  font-size: var(--text-sm);
}

.panel-reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 560ms ease, transform 560ms ease;
}

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

@media (max-width: 1024px) {
  .topbar {
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .thesis-grid {
    grid-template-columns: 1fr 1fr;
  }

  .thesis-card:nth-child(1) {
    grid-column: span 2;
  }

  .evidence-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --container: min(1160px, 95vw);
  }

  .topbar {
    margin-top: max(0.6rem, env(safe-area-inset-top));
    top: 0.4rem;
    padding: 0.62rem 0.72rem;
    border-radius: 0.88rem;
    border-color: color-mix(in oklch, var(--color-border), var(--color-primary) 18%);
    background: color-mix(in oklch, var(--color-surface), white 22%);
    box-shadow: 0 20px 38px -30px oklch(28% 0.04 245 / 0.42);
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "brand lang"
      "nav nav";
    align-items: center;
    row-gap: 0.5rem;
  }

  .brand {
    grid-area: brand;
    font-size: 0.82rem;
    gap: 0.52rem;
  }

  .brand-accent {
    padding-inline: 0.42rem;
  }

  .lang-switch {
    grid-area: lang;
    justify-self: end;
  }

  .topnav {
    grid-area: nav;
    width: 100%;
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    gap: 0.42rem;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 0.08rem;
  }

  .topnav::-webkit-scrollbar {
    display: none;
  }

  .topnav a {
    display: inline-flex;
    align-items: center;
    min-height: 2rem;
    white-space: nowrap;
    border: var(--line);
    border-radius: 999px;
    padding: 0.32rem 0.62rem;
    color: color-mix(in oklch, var(--color-text), var(--color-primary) 18%);
    background: color-mix(in oklch, var(--color-surface), white 36%);
  }

  .topnav a:hover,
  .topnav a:focus-visible {
    background: color-mix(in oklch, var(--color-primary-soft), white 30%);
    color: var(--color-primary-strong);
  }

  .section {
    padding: clamp(2.15rem, 6.3vw, 3.1rem) 0;
    scroll-margin-top: 7rem;
  }

  .hero-main,
  .contact-panel {
    padding: var(--space-4);
    border-radius: 1rem;
  }

  .hero-main::after {
    inset: auto -24% -72% 22%;
    height: 74%;
    opacity: 0.72;
  }

  .hero h1 {
    font-size: clamp(1.72rem, 7.8vw, 2.22rem);
    line-height: 1.15;
    letter-spacing: -0.022em;
    max-width: none;
    text-wrap: balance;
  }

  .hero-lead {
    margin-top: 0.92rem;
    line-height: 1.74;
    color: color-mix(in oklch, var(--color-text-soft), var(--color-primary) 6%);
  }

  .hero-proof {
    margin-top: var(--space-3);
    gap: 0.56rem;
  }

  .hero-ai-focus {
    margin-top: var(--space-2);
    padding: var(--space-2);
    border: 1px solid color-mix(in oklch, var(--color-primary), white 58%);
    box-shadow: inset 0 1px 0 oklch(100% 0 0 / 0.7);
  }

  .hero-ai-title {
    letter-spacing: 0.1em;
  }

  .hero-ai-list {
    gap: 0.44rem;
  }

  .cta-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }

  .cta-row .btn {
    width: 100%;
    min-height: 44px;
    white-space: normal;
    text-align: center;
    font-size: 0.92rem;
    padding-block: 0.72rem;
  }

  .cta-row .btn-primary {
    box-shadow: 0 16px 26px -22px color-mix(in oklch, var(--color-primary), black 50%);
  }

  .cta-row .btn-secondary {
    background: color-mix(in oklch, var(--color-surface), var(--color-primary-soft) 30%);
  }

  .hero-side {
    grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
    gap: 0.65rem;
  }

  .hero-photo,
  .hero-contact {
    grid-column: 1 / -1;
    border-radius: 1rem;
  }

  .hero-photo img {
    height: clamp(208px, 52vw, 290px);
    object-position: center 12%;
  }

  .hero-photo figcaption {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    padding: 0.56rem 0.7rem 0.62rem;
    font-size: 0.74rem;
  }

  .metric {
    min-height: 108px;
    padding: var(--space-2);
    border-radius: 1rem;
  }

  .metric-value {
    font-size: clamp(1.72rem, 7vw, 2.08rem);
  }

  .metric-label {
    margin-top: 0.34rem;
    font-size: 0.84rem;
    line-height: 1.4;
  }

  .hero-contact {
    padding: var(--space-2);
    background: color-mix(in oklch, var(--color-primary-soft), white 56%);
  }

  .hero-contact a + a {
    margin-top: 0.08rem;
  }

  .section-head {
    margin-bottom: var(--space-3);
  }

  .timeline-item,
  .ai-card,
  .evidence-card {
    padding: var(--space-2);
  }

  .contact-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }

  .contact-actions .btn {
    width: 100%;
    min-height: 44px;
  }

  .footer p {
    font-size: 0.82rem;
    line-height: 1.55;
  }

  .thesis-grid,
  .ai-grid,
  .evidence-grid {
    grid-template-columns: 1fr;
  }

  .thesis-card:nth-child(1) {
    grid-column: auto;
  }
}

@media (max-width: 430px) {
  .topbar {
    padding: 0.58rem 0.62rem;
    row-gap: 0.44rem;
  }

  .topnav a {
    min-height: 1.92rem;
    font-size: 0.82rem;
    padding: 0.28rem 0.56rem;
  }

  .hero-main {
    padding: var(--space-3);
  }

  .hero-kicker {
    letter-spacing: 0.13em;
  }

  .hero h1 {
    font-size: clamp(1.58rem, 8.2vw, 1.95rem);
    line-height: 1.18;
  }

  .hero-lead {
    font-size: 0.96rem;
    line-height: 1.66;
  }

  .hero-ai-list li,
  .hero-proof li {
    font-size: 0.9rem;
    line-height: 1.52;
  }

  .hero-proof li {
    padding-left: 0.58rem;
  }

  .hero-side {
    grid-template-columns: 1fr;
  }

  .metric {
    min-height: 104px;
  }

  .metric-value {
    font-size: clamp(1.62rem, 8.3vw, 1.98rem);
  }

  .hero-photo figcaption {
    gap: 0.35rem 0.5rem;
  }

  .section-head h2 {
    line-height: 1.2;
  }
}

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

  .panel-reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .btn-primary:hover,
  .btn-primary:focus-visible {
    transform: none;
  }
}