:root {
  --paper: #f4f0e7;
  --paper-light: #fbfaf6;
  --ink: #17343a;
  --ink-soft: #466066;
  --teal: #176c67;
  --teal-dark: #0f504e;
  --mint: #cfe0d6;
  --mint-light: #e6eee8;
  --copper: #a94e2b;
  --copper-soft: #f0d5c7;
  --line: rgba(23, 52, 58, 0.18);
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(20, 49, 54, 0.12);
  --radius-sm: 12px;
  --radius-md: 22px;
  --radius-lg: 34px;
  --shell: min(1180px, calc(100% - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter, Aptos, "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

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

button {
  font: inherit;
}

a {
  color: inherit;
}

:where(a, button, summary):focus-visible {
  outline: 3px solid var(--copper);
  outline-offset: 4px;
}

:is(.hero-card, .ai-toolkit, .closing-card, .evidence-bank)
  :where(a, button, summary):focus-visible {
  outline-color: #f3c3a9;
}

section[id] {
  scroll-margin-top: 96px;
}

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

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

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--ink);
  color: var(--white);
  transform: translateY(-150%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(23, 52, 58, 0.1);
  background: rgba(244, 240, 231, 0.91);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 80px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 28px;
}

.identity {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 12px;
  width: fit-content;
  text-decoration: none;
}

.identity-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper-light);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.identity strong,
.identity small {
  display: block;
}

.identity strong {
  font-size: 0.95rem;
}

.identity small {
  color: var(--ink-soft);
  font-size: 0.72rem;
}

nav {
  display: flex;
  gap: 24px;
}

nav a,
.library-link {
  min-height: 44px;
  align-items: center;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
}

nav a {
  display: inline-flex;
  color: var(--ink-soft);
}

nav a:hover,
nav a:focus-visible {
  color: var(--teal);
}

.library-link {
  justify-self: end;
  display: inline-flex;
  gap: 7px;
  align-items: center;
}

.library-link span {
  color: var(--copper);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 92px 0 100px;
}

.hero::before {
  content: "";
  position: absolute;
  z-index: 0;
  inset: 0 0 0 46%;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(23, 108, 103, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 108, 103, 0.07) 1px, transparent 1px),
    linear-gradient(
      135deg,
      transparent 49.75%,
      rgba(169, 78, 43, 0.1) 50%,
      transparent 50.25%
    );
  background-size:
    78px 78px,
    78px 78px,
    100% 100%;
  -webkit-mask-image: linear-gradient(to right, transparent, #000 28%);
  mask-image: linear-gradient(to right, transparent, #000 28%);
  transform: skewX(-7deg);
  transform-origin: top right;
}

.hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  inset: 0 0 0 50%;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 26%, var(--copper) 0 4px, transparent 5px),
    radial-gradient(circle at 49% 16%, var(--teal) 0 5px, transparent 6px),
    radial-gradient(circle at 76% 40%, var(--teal) 0 4px, transparent 5px),
    radial-gradient(circle at 35% 66%, var(--copper) 0 4px, transparent 5px),
    radial-gradient(circle at 82% 80%, var(--teal) 0 5px, transparent 6px);
  opacity: 0.45;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(360px, 0.84fr);
  gap: 74px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--teal);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero .eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero .eyebrow span {
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--mint);
  color: var(--teal-dark);
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.08;
}

h1 {
  max-width: 780px;
  margin-bottom: 28px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3rem, 5.3vw, 5.9rem);
  font-weight: 400;
  letter-spacing: -0.055em;
}

h1 em {
  display: block;
  color: var(--copper);
  font-weight: 400;
}

h2 {
  margin-bottom: 18px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.25rem, 4vw, 4.25rem);
  font-weight: 400;
  letter-spacing: -0.045em;
}

h3 {
  font-size: 1.45rem;
}

.lead {
  max-width: 680px;
  margin: 0 0 16px;
  color: var(--ink);
  font-size: clamp(1.12rem, 1.6vw, 1.32rem);
}

.supporting-copy {
  max-width: 650px;
  margin: 0;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 800;
  text-decoration: none;
  transition:
    transform 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease;
}

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

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

.button-primary:hover {
  background: var(--teal-dark);
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.36);
}

.button-secondary:hover {
  border-color: var(--teal);
}

.hero-card {
  position: relative;
  overflow: hidden;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: var(--radius-lg);
  background: var(--ink);
  color: var(--white);
  box-shadow: var(--shadow);
}

.hero-card::after {
  content: "";
  position: absolute;
  right: -50px;
  bottom: -70px;
  width: 210px;
  height: 210px;
  border-radius: 50%;
  background: var(--copper);
  opacity: 0.16;
}

.hero-card-topline,
.hero-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.hero-card-topline {
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-dot {
  position: relative;
  padding-left: 14px;
  color: #b8d6cf;
  font-size: 0.72rem;
}

.status-dot::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #8fc3a8;
  transform: translateY(-50%);
}

.contribution-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 8px 0;
  list-style: none;
}

.contribution-list li {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 10px;
  padding: 22px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
}

.contribution-list li:last-child {
  border-bottom: 0;
}

.contribution-list > li > span {
  color: #8bbdb5;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 0.95rem;
}

.contribution-list strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1rem;
}

.contribution-list p {
  margin: 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.84rem;
}

.hero-card-footer {
  position: relative;
  z-index: 1;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 0.74rem;
}

.hero-card-footer span {
  color: rgba(255, 255, 255, 0.6);
}

.track-section,
.proof-section,
.model-section {
  padding: 104px 0;
}

.track-section {
  border-radius: 54px 54px 0 0;
  background: var(--paper-light);
}

.section-heading {
  max-width: 770px;
  margin-bottom: 46px;
}

.section-heading > p:last-child {
  max-width: 650px;
  margin: 0;
  color: var(--ink-soft);
}

.split-heading {
  display: grid;
  max-width: none;
  grid-template-columns: 1fr 0.72fr;
  gap: 80px;
  align-items: end;
}

.split-heading > p {
  padding-bottom: 8px;
}

.track-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.track-tab {
  position: relative;
  display: flex;
  min-height: 84px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  font-weight: 800;
  cursor: pointer;
}

.track-tab:last-child {
  border-right: 0;
}

.track-tab span {
  color: var(--copper);
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
}

.track-tab::after {
  content: "";
  position: absolute;
  right: 18%;
  bottom: -1px;
  left: 18%;
  height: 3px;
  background: var(--teal);
  transform: scaleX(0);
  transition: transform 180ms ease;
}

.track-tab:hover,
.track-tab:focus-visible,
.track-tab.is-active {
  color: var(--ink);
}

.track-tab.is-active::after {
  transform: scaleX(1);
}

.track-panels {
  padding-top: 54px;
}

.track-panel {
  display: grid;
  grid-template-columns: 1fr 0.78fr;
  gap: 72px;
  align-items: start;
  animation: panel-in 300ms ease both;
}

.track-panel[hidden] {
  display: none;
}

.track-panel h3 {
  max-width: 620px;
  margin-bottom: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 3.2vw, 3.35rem);
  font-weight: 400;
  letter-spacing: -0.035em;
}

.track-panel > p {
  margin: 27px 0 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.panel-kicker {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.tag-list {
  display: flex;
  grid-column: 1 / -1;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tag-list li {
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-soft);
  font-size: 0.77rem;
  font-weight: 700;
}

.evidence-strip {
  background: var(--teal);
  color: var(--white);
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.evidence-grid div {
  display: grid;
  min-height: 165px;
  align-content: center;
  padding: 24px 36px;
  border-right: 1px solid rgba(255, 255, 255, 0.18);
}

.evidence-grid div:last-child {
  border-right: 0;
}

.evidence-grid strong {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.25rem, 4vw, 3.8rem);
  font-weight: 400;
  letter-spacing: -0.04em;
}

.evidence-grid span {
  max-width: 180px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 0.78rem;
}

.proof-section {
  background: var(--paper);
}

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

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

.proof-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.45);
}

.document-preview {
  position: relative;
  overflow: hidden;
  display: block;
  width: 100%;
  height: 250px;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: #dfe6e1;
  cursor: zoom-in;
}

.document-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  filter: saturate(0.88);
  transition:
    transform 300ms ease,
    filter 300ms ease;
}

.document-preview span {
  position: absolute;
  right: 14px;
  bottom: 14px;
  padding: 8px 11px;
  border-radius: 999px;
  background: rgba(23, 52, 58, 0.9);
  color: var(--white);
  font-size: 0.72rem;
  font-weight: 800;
  opacity: 0;
  transform: translateY(6px);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.document-preview:hover img,
.document-preview:focus-visible img {
  filter: saturate(1);
  transform: scale(1.025);
}

.document-preview:hover span,
.document-preview:focus-visible span {
  opacity: 1;
  transform: translateY(0);
}

.proof-content {
  position: relative;
  min-height: 410px;
  padding: 28px;
}

.proof-status {
  display: inline-block;
  margin-bottom: 30px;
  padding: 6px 9px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.status-done {
  background: var(--mint);
  color: var(--teal-dark);
}

.status-idea {
  background: var(--copper-soft);
  color: #804127;
}

.proof-number {
  position: absolute;
  top: 28px;
  right: 28px;
  margin: 0;
  color: rgba(23, 52, 58, 0.32);
  font-family: Georgia, "Times New Roman", serif;
}

.proof-content h3 {
  min-height: 60px;
  margin-bottom: 16px;
}

.proof-content > p:not(.proof-number) {
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.text-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 7px;
  padding: 8px 0;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: transparent;
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.text-link::after {
  content: "+";
}

.text-link[aria-expanded="true"]::after {
  content: "−";
}

.proof-detail p {
  margin-bottom: 0;
  padding-top: 8px;
  color: var(--ink-soft);
  font-size: 0.86rem;
}

.ai-toolkit {
  display: grid;
  grid-template-columns: 0.72fr 1fr 0.72fr;
  gap: 48px;
  align-items: center;
  margin-top: 22px;
  padding: 38px 42px;
  border-radius: var(--radius-md);
  background: var(--ink);
  color: var(--white);
}

.toolkit-section {
  padding: 0 0 104px;
  background: var(--mint-light);
}

.toolkit-section .ai-toolkit {
  margin-top: 0;
}

.ai-toolkit .eyebrow {
  color: #93c3b7;
}

.ai-toolkit h2,
.ai-toolkit h3 {
  margin-bottom: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 2rem;
  font-weight: 400;
}

.ai-toolkit > p {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.9rem;
}

.compact-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.compact-facts li {
  display: grid;
  gap: 2px;
}

.compact-facts strong {
  color: #d7e9e2;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.65rem;
  font-weight: 400;
}

.compact-facts span {
  color: rgba(255, 255, 255, 0.54);
  font-size: 0.72rem;
}

.model-section {
  background: var(--mint-light);
}

.model-grid {
  display: grid;
  grid-template-columns: 0.82fr 1fr;
  gap: 90px;
  align-items: center;
}

.model-intro > p:not(.eyebrow) {
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.principle-card {
  display: grid;
  gap: 8px;
  margin-top: 34px;
  padding: 22px 24px;
  border-left: 3px solid var(--copper);
  background: rgba(255, 255, 255, 0.48);
}

.principle-card span {
  color: var(--ink-soft);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.model-document-preview {
  height: 190px;
  margin-top: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.route-stack {
  display: grid;
  gap: 12px;
}

.route-card {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  padding: 28px;
  border: 1px solid rgba(23, 52, 58, 0.12);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.64);
}

.route-card-accent {
  background: var(--teal);
  color: var(--white);
}

.route-index {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.2rem;
}

.route-card h3 {
  margin-bottom: 10px;
}

.route-card p:last-child {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.87rem;
}

.route-card-accent .panel-kicker,
.route-card-accent p:last-child {
  color: rgba(255, 255, 255, 0.7);
}

.route-foundation {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 20px 28px;
  color: var(--ink-soft);
  font-size: 0.75rem;
}

.route-foundation > span {
  flex: 0 0 auto;
  color: var(--ink);
  font-weight: 800;
}

.route-foundation ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.route-foundation li::before {
  content: "•";
  margin-right: 7px;
  color: var(--copper);
}

.closing-section {
  padding: 78px 0;
  background: var(--paper);
}

.closing-card {
  padding: clamp(38px, 7vw, 84px);
  border-radius: var(--radius-lg);
  background: var(--teal-dark);
  color: var(--white);
}

.closing-card .eyebrow {
  color: #9fcfc4;
}

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

.closing-card > p:not(.eyebrow) {
  max-width: 760px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 1.05rem;
}

.closing-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-top: 32px;
}

.button-light {
  background: var(--paper-light);
  color: var(--teal-dark);
}

.text-link-light {
  color: var(--white);
}

.text-link-light::after {
  content: "↗";
}

footer {
  padding: 32px 0 42px;
  background: var(--paper);
}

.footer-inner {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  color: var(--ink-soft);
  font-size: 0.72rem;
}

.footer-inner strong,
.footer-inner span {
  display: block;
}

.footer-inner strong {
  color: var(--ink);
  font-size: 0.88rem;
}

.footer-inner p {
  margin: 0;
}

.material-dialog {
  width: min(1120px, calc(100% - 32px));
  max-height: calc(100vh - 32px);
  padding: 0;
  border: 0;
  border-radius: var(--radius-md);
  background: var(--paper-light);
  color: var(--ink);
  box-shadow: 0 30px 100px rgba(0, 0, 0, 0.36);
}

.material-dialog::backdrop {
  background: rgba(10, 28, 31, 0.76);
  backdrop-filter: blur(5px);
}

.dialog-header {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
  background: var(--paper-light);
}

.dialog-header h2 {
  margin: 0;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0;
}

.dialog-close {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  font-size: 1.5rem;
  cursor: pointer;
}

.dialog-body {
  padding: 22px;
}

.dialog-body img {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--white);
}

@keyframes panel-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1000px) {
  .header-inner {
    grid-template-columns: 1fr auto;
    row-gap: 0;
  }

  nav {
    grid-column: 1 / -1;
    display: flex;
    min-width: 0;
    overflow-x: auto;
    gap: 20px;
    padding-bottom: 10px;
    scrollbar-width: thin;
    white-space: nowrap;
  }

  .library-link {
    grid-column: 2;
    grid-row: 1;
  }

  section[id] {
    scroll-margin-top: 140px;
  }

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

  .hero-grid {
    gap: 50px;
  }

  .hero-card {
    max-width: 660px;
  }

  .split-heading {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

  .ai-toolkit {
    grid-template-columns: 0.72fr 1fr;
  }

  .compact-facts {
    grid-column: 1 / -1;
  }

  .model-grid {
    gap: 50px;
  }
}

@media (max-width: 720px) {
  :root {
    --shell: min(100% - 24px, 1180px);
  }

  .header-inner {
    min-height: 68px;
  }

  .identity small,
  .library-link {
    display: none;
  }

  .hero {
    padding: 62px 0 72px;
  }

  .hero::before {
    opacity: 0.55;
  }

  .hero::after {
    opacity: 0.26;
  }

  .hero-grid {
    gap: 36px;
  }

  h1 {
    font-size: clamp(2.65rem, 13vw, 4.2rem);
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .hero-card {
    padding: 24px;
    border-radius: var(--radius-md);
  }

  .hero-card-topline {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .track-section,
  .proof-section,
  .model-section {
    padding: 72px 0;
  }

  .track-section {
    border-radius: 30px 30px 0 0;
  }

  .track-tabs {
    grid-template-columns: 1fr;
  }

  .track-tab {
    min-height: 64px;
    justify-content: flex-start;
    padding-inline: 20px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .track-tab:last-child {
    border-bottom: 0;
  }

  .track-tab::after {
    top: 14px;
    right: auto;
    bottom: 14px;
    left: -1px;
    width: 3px;
    height: auto;
    transform: scaleY(0);
  }

  .track-tab.is-active::after {
    transform: scaleY(1);
  }

  .track-panel {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .track-panel > p {
    margin-top: 0;
  }

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

  .evidence-grid div {
    min-height: 130px;
    padding: 18px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  }

  .evidence-grid div:nth-child(2) {
    border-right: 0;
  }

  .evidence-grid div:nth-child(3),
  .evidence-grid div:nth-child(4) {
    border-bottom: 0;
  }

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

  .proof-content {
    min-height: auto;
  }

  .ai-toolkit {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 30px 26px;
  }

  .toolkit-section {
    padding-bottom: 72px;
  }

  .compact-facts {
    grid-column: auto;
  }

  .route-card {
    grid-template-columns: 46px 1fr;
    padding: 24px 20px;
  }

  .route-index {
    width: 40px;
    height: 40px;
  }

  .route-foundation {
    flex-direction: column;
    gap: 10px;
    padding-inline: 12px;
  }

  .route-foundation ul {
    display: grid;
  }

  .closing-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}