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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.68;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

a {
  color: inherit;
}

.ambient {
  display: none;
}

/* ── Topbar ── */
.topbar {
  width: var(--container);
  margin: 1.2rem auto 0;
  padding: 0.7rem 1.1rem;
  border: var(--line);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  position: sticky;
  top: 0.8rem;
  z-index: 30;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  font: 600 var(--text-sm) / 1.2 var(--font-display);
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.brand-accent {
  border-radius: var(--radius-xs);
  border: var(--line);
  padding: 0.16rem 0.46rem;
  color: var(--color-text-soft);
  font: 500 var(--text-xs) / 1 var(--font-mono);
  letter-spacing: 0.04em;
}

.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);
  transition: color 0.15s;
}

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

.lang-switch {
  display: inline-flex;
  background: transparent;
  border-radius: var(--radius-xs);
  padding: 0.16rem;
  border: var(--line);
}

.lang-btn {
  border: 0;
  background: transparent;
  color: var(--color-text-soft);
  min-width: 2rem;
  min-height: 1.8rem;
  border-radius: calc(var(--radius-xs) - 2px);
  font: 600 0.76rem/1 var(--font-display);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.lang-btn.is-active {
  background: var(--color-surface-strong);
  color: var(--color-text);
}

/* ── Layout ── */
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: var(--color-surface);
}

/* ── Hero ── */
.hero-main {
  padding: var(--space-5);
  position: relative;
  overflow: hidden;
}

.hero-main::after {
  display: none;
}

.hero-kicker {
  margin: 0;
  font: 500 var(--text-xs) / 1.2 var(--font-mono);
  letter-spacing: 0.12em;
  color: var(--color-text-soft);
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

.hero h1 {
  margin-top: var(--space-3);
  font-size: var(--text-2xl);
  line-height: 1.1;
  max-width: 20ch;
  font-weight: 700;
  color: var(--color-text);
}

.hero-lead {
  margin-top: var(--space-3);
  max-width: 62ch;
  color: var(--color-text-soft);
  line-height: 1.7;
}

.hero-ai-focus {
  margin-top: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--color-surface-strong);
  border: var(--line);
}

.hero-ai-title {
  margin: 0;
  font: 600 var(--text-xs) / 1.2 var(--font-mono);
  letter-spacing: 0.1em;
  color: var(--color-text-soft);
  text-transform: uppercase;
}

.hero-ai-list {
  margin: 0.7rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.5rem;
}

.hero-ai-list li {
  position: relative;
  padding-left: 1rem;
  color: var(--color-text);
  font-size: var(--text-sm);
}

.hero-ai-list li::before {
  content: "–";
  position: absolute;
  left: 0;
  color: var(--color-text-soft);
}

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

.hero-proof li {
  border-left: 1px solid rgba(255, 255, 255, 0.2);
  padding-left: var(--space-2);
  color: var(--color-text-soft);
  font-size: var(--text-sm);
}

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

.btn {
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.1rem;
  text-decoration: none;
  border: var(--line);
  font: 500 var(--text-sm) / 1 var(--font-display);
  white-space: nowrap;
  letter-spacing: -0.01em;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn-primary {
  background: var(--color-text);
  color: #000000;
  border-color: var(--color-text);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: rgba(255, 255, 255, 0.88);
  border-color: rgba(255, 255, 255, 0.88);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-soft);
  border-color: rgba(255, 255, 255, 0.12);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--color-surface-strong);
  color: var(--color-text);
  border-color: rgba(255, 255, 255, 0.2);
}

/* ── Hero side ── */
.hero-side {
  display: grid;
  gap: var(--space-2);
  grid-template-columns: minmax(0, 1fr);
  align-content: start;
}

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

.hero-photo img {
  width: 100%;
  height: clamp(240px, 28vw, 330px);
  object-fit: cover;
  display: block;
  filter: grayscale(20%) brightness(0.9);
}

.hero-photo figcaption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.8rem 0.7rem;
  border-top: var(--line);
  font-size: var(--text-xs);
  color: var(--color-text-soft);
}

.hero-photo figcaption a {
  color: var(--color-text-soft);
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s;
}

.hero-photo figcaption a:hover {
  color: var(--color-text);
}

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

.metric-value {
  margin: 0;
  font: 700 clamp(1.85rem, 1.45rem + 1.2vw, 2.5rem) / 1 var(--font-display);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

.metric-label {
  margin: 0.5rem 0 0;
  color: var(--color-text-soft);
  font-size: var(--text-sm);
  line-height: 1.4;
}

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

.tiny-label {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font: 500 var(--text-xs) / 1.2 var(--font-mono);
  color: var(--color-text-soft);
}

.hero-contact a {
  color: var(--color-text-soft);
  text-decoration: none;
  font-size: var(--text-sm);
  word-break: break-word;
  transition: color 0.15s;
}

.hero-contact a:hover {
  color: var(--color-text);
}

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

.section-index {
  margin: 0 0 0.35rem;
  font: 500 var(--text-xs) / 1 var(--font-mono);
  color: var(--color-text-soft);
  letter-spacing: 0.1em;
}

.section-head h2 {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
}

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

/* ── Thesis ── */
.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: var(--color-surface);
  transition: border-color 0.2s, background 0.2s;
}

.thesis-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--color-surface-strong);
}

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

.thesis-card h3 {
  font-size: clamp(1.04rem, 0.95rem + 0.28vw, 1.24rem);
  font-weight: 600;
  color: var(--color-text);
}

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

/* ── Timeline ── */
.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-2);
}

.timeline-item {
  position: relative;
  padding: var(--space-3);
  border: var(--line);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  transition: border-color 0.2s, background 0.2s;
}

.timeline-item:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--color-surface-strong);
}

.timeline-year {
  margin: 0;
  font: 500 var(--text-xs) / 1 var(--font-mono);
  letter-spacing: 0.08em;
  color: var(--color-text-soft);
}

.timeline-item h3 {
  margin-top: 0.5rem;
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
}

.timeline-org {
  margin: 0.2rem 0 0;
  color: var(--color-text-soft);
  font-size: var(--text-sm);
  font-weight: 500;
}

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

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

.source-ref a {
  font: 500 var(--text-xs) / 1.2 var(--font-display);
  color: var(--color-text-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  transition: color 0.15s, border-color 0.15s;
}

.source-ref a:hover {
  color: var(--color-text);
  border-bottom-color: rgba(255, 255, 255, 0.4);
}

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

.tag {
  display: inline-flex;
  align-items: center;
  border-radius: var(--radius-xs);
  font: 600 var(--text-xs) / 1 var(--font-mono);
  letter-spacing: 0.06em;
  padding: 0.3rem 0.5rem;
}

.tag-fact {
  color: #000;
  background: var(--color-fact);
}

.tag-inference {
  color: #000;
  background: var(--color-inference);
}

/* ── AI grid ── */
.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: var(--color-surface);
  transition: border-color 0.2s, background 0.2s;
}

.ai-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--color-surface-strong);
}

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

.ai-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
}

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

/* ── Evidence ── */
.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: var(--color-surface);
  transition: border-color 0.2s, background 0.2s;
}

.evidence-card:hover {
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--color-surface-strong);
}

.evidence-type {
  margin: 0;
  color: var(--color-text-soft);
  font: 500 var(--text-xs) / 1.1 var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.evidence-card a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  font-size: var(--text-sm);
  line-height: 1.4;
  transition: color 0.15s;
}

.evidence-card a:hover {
  color: rgba(255, 255, 255, 0.7);
}

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

/* ── Contact ── */
.contact {
  padding-bottom: var(--space-7);
}

.contact-panel {
  border: var(--line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  padding: var(--space-5);
}

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

/* ── Footer ── */
.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: var(--color-surface);
  padding: var(--space-2);
  color: var(--color-text-soft);
  font-size: var(--text-sm);
}

/* ── Dynamic card fade-in (no observer needed) ── */
.timeline-item,
.ai-card,
.evidence-card,
.thesis-card {
  animation: fadeUp 400ms ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Reveal animation ── */
.js-loaded .panel-reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 500ms ease, transform 500ms ease;
}

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

@media (min-width: 1025px) {
  .topbar {
    padding: 0.82rem 1.2rem;
    border-radius: 1rem;
    background: rgba(0, 0, 0, 0.76);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
  }

  .topnav {
    gap: clamp(0.85rem, 1vw, 1.2rem);
  }

  .section {
    padding: clamp(4.5rem, 4.8vw, 5.9rem) 0;
  }

  .hero {
    grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.82fr);
    gap: clamp(1.5rem, 2vw, 2.4rem);
    align-items: stretch;
  }

  .hero-main {
    padding: clamp(2.35rem, 1.9rem + 1vw, 3.1rem);
    border-radius: var(--radius-lg);
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0) 34%),
      var(--color-surface);
    box-shadow: 0 22px 44px rgba(0, 0, 0, 0.2);
  }

  .hero h1 {
    max-width: 14ch;
    font-size: clamp(2.6rem, 1.8rem + 1.8vw, 4rem);
    line-height: 1.04;
  }

  .hero-lead {
    max-width: 58ch;
    margin-top: 1rem;
    font-size: 1.04rem;
    line-height: 1.78;
  }

  .hero-ai-focus {
    margin-top: var(--space-4);
    padding: clamp(1.1rem, 0.95rem + 0.45vw, 1.45rem);
    border-radius: var(--radius-md);
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.01)),
      var(--color-surface-strong);
  }

  .hero-ai-list {
    gap: 0.62rem;
  }

  .hero-proof {
    max-width: 48ch;
    margin-top: calc(var(--space-4) + 0.12rem);
    gap: 0.78rem;
  }

  .hero-proof li {
    padding-left: calc(var(--space-2) + 0.16rem);
  }

  .cta-row {
    margin-top: calc(var(--space-4) + 0.3rem);
  }

  .cta-row .btn {
    min-height: 46px;
    padding-inline: 1.2rem;
  }

  .hero-side {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
  }

  .hero-photo {
    grid-column: 1 / -1;
    border-radius: var(--radius-lg);
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01)),
      var(--color-surface);
  }

  .hero-photo img {
    height: clamp(304px, 25vw, 372px);
    object-position: center 10%;
  }

  .hero-photo figcaption {
    padding: 0.72rem 0.95rem 0.82rem;
  }

  .metric {
    min-height: 148px;
    padding: 1rem 1.05rem;
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0.01)),
      var(--color-surface);
  }

  .hero-side > .metric:last-child {
    grid-column: 1 / -1;
    min-height: 122px;
  }

  .metric-value {
    font-size: clamp(2rem, 1.45rem + 1vw, 2.7rem);
  }

  .metric-label {
    max-width: 18ch;
  }

  .section-head {
    max-width: 64ch;
    margin-bottom: clamp(1.9rem, 1.25rem + 1vw, 2.7rem);
  }

  .section-head h2 {
    font-size: clamp(1.72rem, 1.25rem + 0.9vw, 2.22rem);
    letter-spacing: -0.03em;
  }

  .section-head p {
    max-width: 60ch;
    line-height: 1.72;
  }

  .legend {
    gap: 0.5rem;
  }

  .timeline,
  .ai-grid,
  .evidence-grid {
    gap: 1rem;
  }

  .timeline-item,
  .ai-card,
  .evidence-card {
    padding: clamp(1.18rem, 1rem + 0.45vw, 1.45rem);
    border-color: rgba(255, 255, 255, 0.12);
    transition: border-color 0.2s, background 0.2s, transform 0.2s;
  }

  .timeline-item:hover,
  .ai-card:hover,
  .evidence-card:hover {
    transform: translateY(-2px);
  }

  .timeline-item h3,
  .ai-card h3 {
    line-height: 1.24;
  }

  .timeline-impact,
  .ai-card p {
    line-height: 1.66;
  }

  .source-ref {
    margin-top: 0.84rem;
  }

  .evidence-card {
    grid-template-rows: auto auto 1fr;
    min-height: 198px;
  }

  .evidence-card a {
    font-size: 0.98rem;
    line-height: 1.48;
  }

  .evidence-note {
    line-height: 1.6;
  }

  .contact-panel {
    padding: clamp(2.35rem, 1.8rem + 1.15vw, 3rem);
    border-radius: calc(var(--radius-lg) + 0.2rem);
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.012)),
      var(--color-surface);
  }

  .contact-panel h2 {
    max-width: 16ch;
    font-size: clamp(1.72rem, 1.28rem + 0.85vw, 2.18rem);
  }

  .contact-panel p {
    max-width: 58ch;
    line-height: 1.72;
  }

  .contact-actions {
    margin-top: calc(var(--space-3) + 0.18rem);
  }

  .footer p {
    padding-top: 1rem;
  }
}

/* ── Responsive ── */
@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);
  }

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

  .topbar {
    margin-top: max(0.6rem, env(safe-area-inset-top));
    top: 0.4rem;
    padding: 0.62rem 0.72rem;
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.92);
    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;
    scroll-snap-type: x proximity;
    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;
    scroll-snap-align: start;
    border: var(--line);
    border-radius: var(--radius-xs);
    padding: 0.32rem 0.62rem;
    color: var(--color-text-soft);
    background: var(--color-surface);
  }

  .topnav a:hover,
  .topnav a:focus-visible {
    background: var(--color-surface-strong);
    color: var(--color-text);
  }

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

  .section-head p {
    line-height: 1.62;
  }

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

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

  .hero-lead {
    margin-top: 0.92rem;
    line-height: 1.74;
  }

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

  .hero-ai-focus {
    margin-top: var(--space-2);
    padding: var(--space-2);
  }

  .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;
  }

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

  .hero-photo,
  .hero-contact {
    grid-column: 1 / -1;
    border-radius: var(--radius-md);
  }

  .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: var(--radius-md);
  }

  .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);
  }

  .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);
  }

  .timeline-item h3,
  .ai-card h3,
  .evidence-card a,
  .contact-panel h2 {
    line-height: 1.24;
  }

  .timeline-org,
  .timeline-impact,
  .ai-card p,
  .evidence-note,
  .contact-panel p {
    line-height: 1.58;
  }

  .legend {
    flex-wrap: wrap;
    row-gap: 0.35rem;
  }

  .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: 560px) {
  .topbar {
    grid-template-columns: 1fr;
    grid-template-areas:
      "brand"
      "lang"
      "nav";
    justify-items: start;
    row-gap: 0.42rem;
    padding: 0.6rem 0.62rem;
  }

  .lang-switch {
    justify-self: start;
  }

  .topnav {
    gap: 0.36rem;
  }

  .topnav a {
    min-height: 1.94rem;
    font-size: 0.82rem;
    padding: 0.28rem 0.56rem;
  }

  .section {
    padding: clamp(1.95rem, 8.5vw, 2.65rem) 0;
  }

  .hero-main,
  .contact-panel {
    padding: 1rem;
  }

  .hero h1 {
    font-size: clamp(1.62rem, 7.3vw, 2rem);
  }

  .hero-lead {
    font-size: 0.96rem;
    line-height: 1.68;
  }

  .hero-ai-focus {
    padding: 0.9rem;
  }

  .hero-proof li {
    padding-left: 0.76rem;
  }

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

  .hero-photo figcaption {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .metric {
    min-height: 98px;
    padding: 0.9rem;
  }

  .metric-label {
    font-size: 0.82rem;
  }

  .section-head {
    margin-bottom: var(--space-2);
  }

  .section-head h2 {
    font-size: clamp(1.34rem, 5.8vw, 1.72rem);
  }

  .section-head p {
    margin-top: 0.62rem;
    font-size: 0.92rem;
  }

  .timeline-item,
  .ai-card,
  .evidence-card {
    padding: 0.92rem;
  }

  .timeline-item h3,
  .ai-card h3 {
    font-size: 1rem;
  }

  .timeline-org,
  .timeline-impact,
  .ai-card p,
  .evidence-card a {
    font-size: 0.9rem;
  }

  .contact-panel p,
  .footer p {
    font-size: 0.86rem;
  }
}

@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);
  }

  .contact-panel {
    padding: 0.92rem;
  }

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

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

  .section-head p,
  .timeline-org,
  .timeline-impact,
  .ai-card p,
  .evidence-note,
  .contact-panel p {
    font-size: 0.88rem;
  }

  .timeline-item h3,
  .ai-card h3 {
    font-size: 0.98rem;
  }

  .evidence-card a {
    font-size: 0.88rem;
    line-height: 1.48;
  }

  .contact-actions .btn {
    font-size: 0.9rem;
  }
}

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

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

  .timeline-item,
  .ai-card,
  .evidence-card,
  .thesis-card {
    animation: none;
  }
}