@font-face {
  font-family: Jakarta;
  src: url("assets/fonts/jakarta-regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: Jakarta;
  src: url("assets/fonts/jakarta-semibold.ttf") format("truetype");
  font-weight: 600;
  font-display: swap;
}
@font-face {
  font-family: Jakarta;
  src: url("assets/fonts/jakarta-extrabold.ttf") format("truetype");
  font-weight: 800;
  font-display: swap;
}
:root {
  --ink: #172b46;
  --muted: #586c7e;
  --blue: #246ca9;
  --light: #f5f9fc;
  --line: #dce5ed;
  --header-height: 76px;
  color-scheme: light;
  font-family:
    Jakarta,
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  font-size: 100%;
  color: var(--ink);
  background: #fff;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
}
button,
a {
  -webkit-tap-highlight-color: transparent;
}
button,
input {
  font: inherit;
}
button {
  cursor: pointer;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  color: inherit;
}
img {
  max-width: 100%;
  display: block;
}
h1,
h2,
h3,
p {
  margin: 0;
}
h1,
h2,
h3 {
  font-weight: 800;
  letter-spacing: -0.045em;
}
p {
  line-height: 1.65;
}
button {
  border: 0;
}
sup {
  font-size: 0.45em;
  vertical-align: super;
  letter-spacing: 0;
}
button:focus-visible,
a:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid #358bcd;
  outline-offset: 5px;
}
button:focus:not(:focus-visible) {
  outline: none;
}
[hidden] {
  display: none !important;
}
.section-width {
  width: min(1180px, calc(100% - 96px));
  margin-inline: auto;
}
.skip-link {
  position: fixed;
  top: 12px;
  left: 20px;
  z-index: 100;
  background: white;
  padding: 14px;
  border-radius: 8px;
  transform: translateY(-180%);
}
.skip-link:focus {
  transform: none;
}
.site-header {
  height: var(--header-height);
  padding-inline: max(32px, calc((100vw - 1300px) / 2));
  display: flex;
  align-items: center;
  gap: 28px;
  border-bottom: 1px solid #d8e3ec;
  background: #f8fbfdec;
  backdrop-filter: blur(18px);
  position: sticky;
  top: 0;
  z-index: 30;
}
.brand {
  display: flex;
  gap: 11px;
  align-items: center;
  font-size: 1.08rem;
  font-weight: 800;
  letter-spacing: -0.045em;
  white-space: nowrap;
  line-height: 1.15;
}
.brand-symbol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--blue);
  font-family: Arial, sans-serif;
  font-size: 3.25rem;
  font-weight: 400;
  line-height: 1;
}
.brand-product {
  font-size: 0.77rem;
  letter-spacing: 0.08em;
  font-weight: 600;
  display: block;
  color: var(--blue);
  margin-top: 4px;
}
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-inline: auto;
  font-size: 0.85rem;
  font-weight: 600;
}
.desktop-nav a {
  transition: color 0.2s;
}
.desktop-nav a:hover {
  color: var(--blue);
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 17px 26px;
  background: var(--blue);
  border-radius: 30px;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.4;
  transition:
    background 0.2s,
    box-shadow 0.2s;
}
.button:hover {
  background: #19588c;
  box-shadow: 0 6px 22px #1d69a52b;
}
.button-small {
  padding: 11px 19px;
  font-size: 0.875rem;
  gap: 15px;
}
.menu-toggle {
  display: none;
  background: none;
  width: 36px;
  height: 40px;
  padding: 8px;
}
.menu-toggle span {
  display: block;
  height: 2px;
  background: var(--ink);
  margin: 5px 0;
}
.mobile-nav {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  padding: 15px 24px 22px;
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.mobile-nav a {
  display: block;
  padding: 14px 0;
}
.text-link {
  background: none;
  padding: 14px 0;
  color: var(--blue);
  font-size: 0.92rem;
  font-weight: 600;
  display: inline-flex;
  gap: 16px;
  align-items: center;
}
.text-link:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(
    180deg,
    #f6fafd 0%,
    #eff6fc 59%,
    #dcebf8 85%,
    #f5f9fc 100%
  );
  text-align: center;
}
.hero-copy {
  position: relative;
  z-index: 4;
  padding: 62px 24px 0;
}
.product-name {
  font-size: 0.96rem;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 23px;
}
.hero h1 {
  font-size: clamp(3.7rem, 6.8vw, 6.8rem);
  line-height: 1.025;
  letter-spacing: -0.045em;
}
.hero-description {
  font-size: 1.05rem;
  color: var(--muted);
  margin: 26px auto 0;
  max-width: 660px;
  line-height: 1.75;
}
.hero-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
  margin: 29px 0 0;
}
.platform-note {
  font-size: 0.75rem;
  margin-top: 15px;
  color: #677f92;
}
.hero-devices {
  position: relative;
  width: min(1060px, 96%);
  height: 680px;
  margin: 57px auto 0;
  --spread: 0px;
}
.hero-phone {
  position: absolute;
  top: 0;
  width: 280px;
  filter: drop-shadow(0 24px 23px #214e7221);
  transform-origin: center bottom;
  will-change: transform;
}
.hero-phone img {
  width: 100%;
  height: auto;
}
.hero-phone-center {
  left: 50%;
  width: 320px;
  z-index: 3;
  transform: translateX(-50%) translateY(calc(var(--spread) * -0.13));
}
.hero-phone-left {
  left: 50%;
  top: 61px;
  transform: translateX(calc(-149% - var(--spread))) rotate(-9deg);
}
.hero-phone-right {
  left: 50%;
  top: 61px;
  transform: translateX(calc(49% + var(--spread))) rotate(9deg);
}
.device-caption {
  display: block;
  font-size: 0.76rem;
  font-weight: 600;
  margin-top: 17px;
  color: #4c6f8c;
}
.hero-phone-left .device-caption {
  transform: rotate(9deg);
}
.hero-phone-right .device-caption {
  transform: rotate(-9deg);
}
.scroll-cue {
  display: flex;
  gap: 13px;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  color: #4a6780;
  margin: 35px 0 45px;
}
.scroll-line {
  height: 30px;
  width: 1px;
  background: #90a9bc;
  display: block;
}
.introduction {
  text-align: center;
  padding: 135px 0 145px;
}
.section-kicker {
  color: var(--blue);
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 22px;
}
.introduction h2 {
  font-size: clamp(3.5rem, 6vw, 5.5rem);
  line-height: 1.08;
  margin-bottom: 30px;
}
.introduction > p:not(.section-kicker) {
  font-size: 1.2rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 730px;
  margin: auto;
}
.subject-list {
  display: flex;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  margin-top: 44px;
  font-size: 0.85rem;
  font-weight: 600;
  color: #647b8f;
}
.subject-list span {
  padding: 0 25px;
  border-right: 1px solid var(--line);
}
.subject-list span:last-child {
  border: 0;
}
.story {
  position: relative;
  background: #f4f8fb;
  height: auto;
}
.story-stage {
  padding: 75px 0 65px;
  position: relative;
  overflow: hidden;
}
.story-inner {
  display: grid;
  grid-template-columns: 1.08fr 1fr;
  gap: 75px;
  align-items: center;
}
.story-copy > .section-kicker {
  margin-bottom: 32px;
}
.chapter-number {
  font-size: 0.78rem;
  color: #667b8d;
  margin-bottom: 21px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.07em;
}
.chapter-copy h2 {
  font-size: clamp(2.8rem, 4.3vw, 4rem);
  line-height: 1.07;
  margin-bottom: 25px;
}
.chapter-copy > p:not(.chapter-number) {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 440px;
}
.chapter-detail {
  display: block;
  font-size: 0.8rem;
  color: #627b8e;
  line-height: 1.7;
  margin-top: 23px;
  max-width: 410px;
}
.chapter-controls {
  display: flex;
  gap: 6px;
  margin-top: 40px;
  flex-wrap: wrap;
}
.chapter-button {
  padding: 12px 13px 12px 0;
  font-size: 0.8125rem;
  background: none;
  color: #617487;
  text-align: left;
  border-bottom: 2px solid #d4e0e9;
  min-width: 72px;
  transition:
    color 0.2s,
    border-color 0.2s;
}
.chapter-button span {
  display: block;
  font-size: 0.75rem;
  margin-bottom: 7px;
}
.chapter-button[aria-pressed="true"] {
  color: var(--blue);
  border-color: var(--blue);
  font-weight: 800;
}
.story-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.story-image-wrap {
  position: relative;
  width: min(300px, 36vh);
  filter: drop-shadow(0 16px 23px #1b2a4a17);
}
.device-cutout {
  width: 100%;
  height: auto;
  mask-image: url("assets/screens/learn.png");
  mask-size: 100% 100%;
  mask-repeat: no-repeat;
}
.zoom-button {
  position: absolute;
  right: -25px;
  bottom: 15px;
  border-radius: 50%;
  width: 43px;
  height: 43px;
  background: white;
  border: 1px solid #d5e3ee;
  color: var(--blue);
  font-size: 1.6rem;
  box-shadow: 0 5px 18px #172b4610;
}
.zoom-button:hover {
  background: #e5f1fa;
}
.story-hint {
  font-size: 0.75rem;
  margin-top: 26px;
  color: #60788a;
}
.story-hint span {
  margin-right: 8px;
}
.story-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: #dae7f1;
}
.story-progress span {
  height: 100%;
  display: block;
  width: 20%;
  background: #3689c4;
  transition: width 0.15s;
}
.scroll-enabled .story {
  height: 460svh;
}
.scroll-enabled .story-stage {
  position: sticky;
  top: var(--header-height);
  height: calc(100svh - var(--header-height));
  min-height: 580px;
  padding: 30px 0;
  display: flex;
  align-items: center;
}
.scroll-enabled .story-inner {
  width: min(1180px, calc(100% - 96px));
}
.story-image-wrap img {
  aspect-ratio: 917/1816;
}
.chapter-copy {
  animation: chapter-in 0.45s ease both;
}
@keyframes chapter-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.activities {
  background: #142c48;
  color: #f5f9fd;
  padding: 115px 0 100px;
}
.activities-heading {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 0 110px;
  align-items: end;
}
.activities-heading .section-kicker {
  grid-column: 1/-1;
  color: #9bc8ec;
}
.activities-heading h2 {
  font-size: clamp(3rem, 4.6vw, 4.4rem);
  line-height: 1.06;
}
.activities-heading > p:last-child {
  font-size: 1.05rem;
  color: #aec2d3;
  max-width: 340px;
  margin-bottom: 6px;
}
.activity-tabs {
  display: flex;
  gap: 10px;
  margin: 48px 0 56px;
  padding: 8px;
  border: 1px solid #466078;
  border-radius: 50px;
  width: fit-content;
  flex-wrap: wrap;
}
.activity-tabs button {
  font-size: 0.875rem;
  line-height: 1.4;
  padding: 13px 19px;
  border-radius: 26px;
  color: #cad8e5;
  background: none;
  white-space: nowrap;
}
.activity-tabs button[aria-selected="true"] {
  color: #162f4b;
  background: #f2f8fc;
  font-weight: 600;
}
.activity-tabs button:hover:not([aria-selected="true"]) {
  background: #ffffff0c;
}
.activity-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 110px;
  align-items: center;
  min-height: 590px;
}
.activity-device {
  width: 290px;
  justify-self: center;
  filter: drop-shadow(0 24px 26px #030d1950);
}
.activity-copy {
  max-width: 440px;
}
.activity-label {
  font-size: 0.8rem;
  color: #a5c6e0;
  display: block;
  margin-bottom: 22px;
}
.activity-copy h3 {
  font-size: clamp(2.8rem, 3.7vw, 3.5rem);
  line-height: 1.12;
  margin-bottom: 25px;
}
.activity-copy p {
  font-size: 1.05rem;
  color: #b9cbdc;
  line-height: 1.8;
}
.activity-copy .text-link {
  color: #acd4f5;
  margin-top: 24px;
}
.closing {
  text-align: center;
  background: #f1f7fc;
  padding: 98px 0 100px;
}
.closing-symbol {
  font-size: 7.5rem;
  line-height: 1.1;
  font-family: Arial, sans-serif;
  color: #2d78b4;
  display: inline-block;
  margin-bottom: 10px;
}
.closing .section-kicker {
  margin-bottom: 21px;
}
.closing h2 {
  font-size: clamp(3.6rem, 6.6vw, 6rem);
  line-height: 1.04;
}
.closing h2 + p {
  margin: 27px 0 30px;
  color: var(--muted);
  font-size: 1.15rem;
}
.subscription-note {
  font-size: 0.75rem;
  color: #62768a;
  margin-top: 22px;
  line-height: 1.75;
}
.site-footer {
  padding-top: 64px;
  color: #596d80;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 55px;
}
.footer-brand .brand {
  color: var(--ink);
}
.footer-brand > p {
  font-size: 0.84rem;
  line-height: 1.8;
  margin-top: 22px;
}
.footer-top h2 {
  font-size: 0.84rem;
  color: var(--ink);
  letter-spacing: 0;
  font-weight: 600;
  margin: 8px 0 20px;
}
.footer-top > div > a:not(.brand) {
  display: block;
  font-size: 0.875rem;
  line-height: 1.7;
  margin: 13px 0;
}
.footer-top a:hover {
  color: var(--blue);
}
.motion-control {
  display: flex;
  gap: 7px;
  align-items: center;
  font-size: 0.875rem;
  margin-top: 12px;
  cursor: pointer;
}
.motion-control input {
  accent-color: var(--blue);
  width: 16px;
  height: 16px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  border-top: 1px solid var(--line);
  padding: 26px 0;
  font-size: 0.75rem;
}
.screenshot-dialog {
  max-width: calc(100% - 32px);
  width: 700px;
  max-height: 94dvh;
  border: 0;
  border-radius: 20px;
  padding: 24px;
  background: #fff;
  color: var(--ink);
  box-shadow: 0 40px 100px #06182f50;
}
.screenshot-dialog::backdrop {
  background: #10243cbb;
  backdrop-filter: blur(8px);
}
.dialog-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}
.dialog-bar h2 {
  font-size: 1rem;
  letter-spacing: -0.025em;
}
.dialog-bar button {
  font-size: 1.7rem;
  border-radius: 50%;
  width: 42px;
  height: 42px;
  background: #edf3f8;
}
.screenshot-dialog img {
  height: min(68dvh, 1000px);
  width: auto;
  margin: auto;
}
.screenshot-dialog > p {
  font-size: 0.8rem;
  max-width: 480px;
  margin: 18px auto 0;
  text-align: center;
  color: var(--muted);
}
.ai-notice {
  background: #e4eff8;
  color: #355c7b;
  text-align: center;
  padding: 11px 22px;
  font-size: 0.8125rem;
}
.ai-notice p {
  line-height: 1.5;
}
.ai-notice strong {
  font-weight: 600;
}
.ai-notice a {
  font-weight: 600;
  color: #215d90;
  margin-left: 12px;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.ai-notice a span {
  margin-left: 4px;
}
.ai-bridge {
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 66px 0;
}
.ai-bridge-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 48px;
}
.ai-bridge .section-kicker {
  font-size: 0.8rem;
  margin-bottom: 13px;
}
.ai-bridge h2 {
  font-size: 1.85rem;
  letter-spacing: -0.04em;
  margin-bottom: 16px;
}
.ai-bridge p:not(.section-kicker) {
  font-size: 0.875rem;
  color: var(--muted);
}
.button-outline {
  background: transparent;
  border: 1px solid #a5c1d8;
  color: var(--blue);
  white-space: nowrap;
  font-size: 0.875rem;
}
.button-outline:hover {
  background: #edf6fc;
  box-shadow: none;
}
@media (min-width: 1600px) {
  .hero-devices {
    height: 740px;
  }
  .hero-phone-center {
    width: 350px;
  }
  .hero-phone-left,
  .hero-phone-right {
    width: 310px;
  }
}
@media (max-width: 1000px) {
  .section-width {
    width: calc(100% - 64px);
  }
  .site-header {
    padding-inline: 24px;
  }
  .desktop-nav {
    gap: 20px;
    font-size: 0.76rem;
  }
  .hero h1 {
    font-size: 5rem;
  }
  .story-inner {
    gap: 30px;
  }
  .chapter-copy h2 {
    font-size: 3rem;
  }
  .chapter-button {
    min-width: 60px;
    font-size: 0.8125rem;
    padding-right: 8px;
  }
  .activities-heading {
    gap: 0 50px;
  }
  .activity-panel {
    gap: 50px;
  }
  .activity-tabs button {
    padding: 12px 15px;
  }
  .footer-top {
    gap: 24px;
  }
  .footer-top > div > a:not(.brand) {
    font-size: 0.875rem;
  }
}
@media (max-width: 760px) {
  :root {
    --header-height: 66px;
  }
  .section-width {
    width: calc(100% - 44px);
  }
  .site-header {
    padding-inline: 18px;
    gap: 12px;
  }
  .brand {
    font-size: 0.92rem;
    gap: 7px;
  }
  .brand-symbol {
    width: 30px;
    font-size: 2.7rem;
  }
  .brand-product {
    font-size: 0.75rem;
  }
  .desktop-nav {
    display: none;
  }
  .site-header > .button {
    margin-left: auto;
    padding: 10px 14px;
    font-size: 0.875rem;
    gap: 10px;
  }
  .menu-toggle {
    display: block;
  }
  .hero-copy {
    padding: 47px 20px 0;
  }
  .product-name {
    font-size: 0.85rem;
    margin-bottom: 22px;
  }
  .hero h1 {
    font-size: clamp(3rem, 10.6vw, 4.7rem);
    line-height: 1.06;
  }
  .hero-description {
    font-size: 1rem;
    max-width: 390px;
    margin-top: 24px;
  }
  .desktop-break {
    display: none;
  }
  .hero-actions {
    gap: 17px;
    flex-direction: column;
    margin-top: 26px;
  }
  .hero-actions .text-link {
    padding: 0;
  }
  .button {
    font-size: 0.81rem;
    padding: 15px 23px;
    gap: 15px;
  }
  .platform-note {
    margin-top: 15px;
    font-size: 0.75rem;
  }
  .hero-devices {
    width: 100%;
    height: 460px;
    margin-top: 43px;
  }
  .hero-phone-center {
    width: 215px;
  }
  .hero-phone-left,
  .hero-phone-right {
    width: 178px;
    top: 58px;
  }
  .hero-phone-left {
    transform: translateX(calc(-144% - var(--spread) * 0.25)) rotate(-10deg);
  }
  .hero-phone-right {
    transform: translateX(calc(44% + var(--spread) * 0.25)) rotate(10deg);
  }
  .device-caption {
    display: none;
  }
  .scroll-cue {
    font-size: 0.75rem;
    margin: 10px 0 29px;
  }
  .scroll-line {
    height: 24px;
  }
  .introduction {
    padding: 90px 0;
  }
  .section-kicker {
    font-size: 0.82rem;
    margin-bottom: 18px;
  }
  .introduction h2 {
    font-size: 3.6rem;
    margin-bottom: 25px;
  }
  .introduction > p:not(.section-kicker) {
    font-size: 1.02rem;
    line-height: 1.85;
  }
  .subject-list {
    gap: 12px 0;
    margin-top: 30px;
    font-size: 0.75rem;
  }
  .subject-list span {
    padding-inline: 14px;
  }
  .story-stage {
    padding: 45px 0;
  }
  .story-inner {
    display: flex;
    flex-direction: column;
    gap: 33px;
  }
  .story-copy {
    width: 100%;
  }
  .story-copy > .section-kicker {
    margin-bottom: 20px;
  }
  .chapter-number {
    margin-bottom: 13px;
    font-size: 0.75rem;
  }
  .chapter-copy h2 {
    font-size: 2.55rem;
    line-height: 1.07;
    margin-bottom: 19px;
  }
  .chapter-copy > p:not(.chapter-number) {
    font-size: 1rem;
    line-height: 1.75;
    max-width: none;
  }
  .chapter-detail {
    font-size: 0.75rem;
    margin-top: 14px;
    max-width: none;
  }
  .chapter-controls {
    gap: 6px;
    margin-top: 23px;
    justify-content: space-between;
  }
  .chapter-button {
    padding: 10px 0;
    min-width: 16%;
    font-size: 0.8125rem;
  }
  .chapter-button span {
    font-size: 0.75rem;
  }
  .story-image-wrap {
    width: 235px;
    max-width: 55vw;
  }
  .story-hint {
    font-size: 0.75rem;
    margin-top: 22px;
  }
  .scroll-enabled .story {
    height: 480svh;
  }
  .scroll-enabled .story-stage {
    padding: 24px 0;
    min-height: 0;
  }
  .scroll-enabled .story-inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
    width: calc(100% - 44px);
    height: 100%;
    align-content: center;
  }
  .scroll-enabled .story-copy > .section-kicker {
    display: none;
  }
  .scroll-enabled .chapter-copy h2 {
    font-size: 2.05rem;
    margin-bottom: 12px;
  }
  .scroll-enabled .chapter-copy h2 br {
    display: none;
  }
  .scroll-enabled .chapter-copy > p:not(.chapter-number) {
    font-size: 1rem;
    line-height: 1.65;
  }
  .scroll-enabled .chapter-detail {
    display: none;
  }
  .scroll-enabled .chapter-number {
    font-size: 0.75rem;
    margin-bottom: 10px;
  }
  .scroll-enabled .chapter-controls {
    margin-top: 14px;
  }
  .scroll-enabled .chapter-button {
    padding: 8px 0;
    font-size: 0.8125rem;
  }
  .scroll-enabled .chapter-button span {
    display: none;
  }
  .scroll-enabled .story-image-wrap {
    width: clamp(130px, 21svh, 220px);
  }
  .scroll-enabled .story-hint {
    font-size: 0.75rem;
    margin-top: 12px;
  }
  .activities {
    padding: 77px 0 68px;
  }
  .activities-heading {
    display: block;
  }
  .activities-heading h2 {
    font-size: 3.1rem;
  }
  .activities-heading > p:last-child {
    font-size: 1rem;
    margin: 23px 0 0;
    max-width: 400px;
  }
  .activity-tabs {
    border-radius: 22px;
    gap: 3px;
    padding: 6px;
    margin: 30px 0 38px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    width: 100%;
  }
  .activity-tabs button {
    padding: 12px 5px;
    font-size: 0.875rem;
  }
  .activity-panel {
    display: flex;
    flex-direction: column-reverse;
    gap: 30px;
    min-height: 0;
  }
  .activity-copy {
    width: 100%;
    max-width: none;
    min-height: 230px;
  }
  .activity-label {
    font-size: 0.75rem;
    margin-bottom: 15px;
  }
  .activity-copy h3 {
    font-size: 2.5rem;
    margin-bottom: 17px;
  }
  .activity-copy p {
    font-size: 1rem;
    line-height: 1.8;
  }
  .activity-copy .text-link {
    margin-top: 15px;
    font-size: 0.79rem;
  }
  .activity-device {
    width: 235px;
  }
  .closing {
    padding: 73px 0 80px;
  }
  .closing-symbol {
    font-size: 6rem;
  }
  .closing h2 {
    font-size: 3.5rem;
  }
  .closing h2 + p {
    font-size: 1rem;
  }
  .subscription-note {
    font-size: 0.75rem;
    max-width: 340px;
    margin-inline: auto;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 30px 24px;
    padding-bottom: 32px;
  }
  .footer-brand {
    grid-column: 1/-1;
  }
  .footer-brand > p {
    margin-top: 14px;
  }
  .footer-top h2 {
    margin-bottom: 13px;
  }
  .footer-top > div > a:not(.brand) {
    font-size: 0.875rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    font-size: 0.75rem;
  }
  .screenshot-dialog {
    padding: 16px;
  }
  .dialog-bar h2 {
    font-size: 0.83rem;
  }
}
@media (max-width: 360px) {
  .site-header {
    gap: 8px;
    padding-inline: 12px;
  }
  .brand {
    font-size: 0.8rem;
  }
  .brand-symbol {
    font-size: 2.3rem;
    width: 26px;
  }
  .site-header > .button {
    font-size: 0.875rem;
    padding: 9px 12px;
  }
  .menu-toggle {
    width: 28px;
    padding: 5px;
  }
  .hero h1 {
    font-size: 3rem;
  }
  .chapter-copy h2 {
    font-size: 2.1rem;
  }
  .hero-phone-center {
    width: 195px;
  }
  .hero-phone-left,
  .hero-phone-right {
    width: 160px;
  }
  .hero-devices {
    height: 420px;
  }
  .chapter-button {
    font-size: 0.8125rem;
  }
}
@media (prefers-reduced-motion: reduce) {
  :root {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .hero-phone {
    will-change: auto;
  }
  .hero-devices {
    --spread: 0px !important;
  }
}
html[data-reduced-motion="true"] {
  scroll-behavior: auto;
}
html[data-reduced-motion="true"] *,
html[data-reduced-motion="true"] *::before,
html[data-reduced-motion="true"] *::after {
  animation: none !important;
  transition: none !important;
}
html[data-reduced-motion="true"] .hero-devices {
  --spread: 0px !important;
}
@media (max-width: 760px) {
  .ai-notice {
    font-size: 0.75rem;
    padding: 10px 18px;
  }
  .ai-notice a {
    white-space: nowrap;
    display: inline-block;
    margin-left: 5px;
  }
  .ai-bridge {
    padding: 48px 0;
  }
  .ai-bridge-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 26px;
  }
  .ai-bridge h2 {
    font-size: 1.7rem;
  }
  .ai-bridge .section-kicker {
    font-size: 0.75rem;
  }
  .ai-bridge p:not(.section-kicker) {
    font-size: 0.875rem;
  }
}

/* Visually hidden helper (screen-reader text such as "opens in new tab") */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
/* Honeypot field: off-screen for people, present for bots */
.hp {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
/* Footer newsletter signup (Herald) */
.footer-signup {
  margin-top: 22px;
  max-width: 340px;
}
.footer-signup label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 9px;
}
.signup-row {
  display: flex;
  gap: 8px;
}
.footer-signup input[type="email"] {
  flex: 1;
  min-width: 0;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 24px;
  font-size: 0.875rem;
}
.form-status {
  font-size: 0.8rem;
  margin-top: 10px;
  min-height: 1.2em;
}
.form-status:empty {
  display: none;
}
.signup-fine {
  font-size: 0.72rem;
  margin-top: 10px;
  line-height: 1.5;
}
.footer-company {
  text-decoration: underline;
  text-underline-offset: 3px;
}
@media (max-width: 760px) {
  .signup-row {
    flex-direction: column;
  }
}