:root {
  --navy-950: #031029;
  --navy-900: #071b3d;
  --navy-800: #0a2b5a;
  --blue-600: #1477ef;
  --blue-500: #2c8cff;
  --ice-100: #eef7ff;
  --ice-50: #f7fbff;
  --white: #ffffff;
  --ink: #081a36;
  --muted: #53647a;
  --line: rgba(8, 26, 54, 0.13);
  --shell: min(1160px, calc(100% - 56px));
  --shadow-phone: 0 34px 90px rgba(1, 15, 42, 0.28);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--white);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--white);
}

body,
button,
a {
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2,
h3 {
  margin-top: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--white);
  color: var(--navy-950);
  font-weight: 800;
  transform: translateY(-150%);
}

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

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  color: var(--white);
  transition: background 220ms ease, box-shadow 220ms ease, color 220ms ease;
}

.site-header.is-scrolled,
.legal-header {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 1px 0 rgba(8, 26, 54, 0.09);
  color: var(--ink);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: var(--shell);
  min-height: 84px;
  margin-inline: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-self: start;
  gap: 12px;
  font-size: 25px;
  font-weight: 850;
  letter-spacing: -0.04em;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 34, 92, 0.25);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  font-size: 14px;
  font-weight: 700;
}

.site-nav a,
.footer-links a {
  transition: opacity 160ms ease;
}

.site-nav a:hover,
.footer-links a:hover {
  opacity: 0.62;
}

.header-cta {
  justify-self: end;
  padding: 11px 19px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.header-cta:hover {
  background: var(--white);
  color: var(--navy-950);
  transform: translateY(-1px);
}

.site-header.is-scrolled .header-cta:hover,
.legal-header .header-cta:hover {
  background: var(--navy-900);
  color: var(--white);
}

.hero {
  --hero-shift: 0px;
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  isolation: isolate;
  background: var(--navy-900);
  color: var(--white);
}

.hero-backdrop,
.hero-vignette {
  position: absolute;
  inset: 0;
}

.hero-backdrop {
  z-index: -3;
  inset: -56px -20px;
  background-image: url("assets/alpine-hero.webp");
  background-position: center calc(48% + var(--hero-shift));
  background-size: cover;
  transform: scale(1.06);
  animation: hero-image-in 1.4s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.hero-vignette {
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(2, 14, 38, 0.92) 0%, rgba(4, 25, 60, 0.7) 38%, rgba(4, 27, 62, 0.12) 70%),
    linear-gradient(180deg, rgba(2, 12, 33, 0.44) 0%, transparent 32%, rgba(2, 13, 35, 0.56) 100%);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  align-items: center;
  width: var(--shell);
  min-height: 100svh;
  margin-inline: auto;
  padding: 122px 0 80px;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 620px;
  animation: hero-copy-in 900ms 180ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.hero-product {
  margin-bottom: 8px;
  font-size: clamp(42px, 5.6vw, 76px);
  font-weight: 900;
  line-height: 0.94;
  letter-spacing: -0.065em;
}

.hero-kicker {
  margin-bottom: 42px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  font-weight: 850;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 610px;
  margin-bottom: 24px;
  font-size: clamp(48px, 5.8vw, 78px);
  font-weight: 720;
  line-height: 0.98;
  letter-spacing: -0.06em;
}

.hero-lead {
  max-width: 500px;
  margin-bottom: 36px;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 58px;
  padding: 0 27px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 850;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

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

.button-light {
  background: var(--white);
  box-shadow: 0 18px 42px rgba(1, 13, 38, 0.2);
  color: var(--navy-950);
}

.store-status {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 58px;
  padding: 9px 18px 10px;
  border: 1px solid rgba(255, 255, 255, 0.46);
  border-radius: 15px;
  background: rgba(3, 14, 38, 0.22);
  color: var(--white);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.store-status small {
  display: block;
  margin-bottom: 3px;
  font-size: 10px;
  font-weight: 600;
}

.apple-mark {
  font-size: 29px;
}

.hero-devices {
  position: relative;
  align-self: end;
  height: min(72svh, 720px);
  min-height: 520px;
  animation: hero-devices-in 1s 340ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.phone {
  overflow: hidden;
  border: 7px solid rgba(255, 255, 255, 0.92);
  border-radius: 46px;
  background: var(--white);
  box-shadow: var(--shadow-phone);
}

.phone img {
  width: 100%;
  height: auto;
}

.phone-back,
.phone-front {
  position: absolute;
  bottom: -100px;
  width: min(43%, 330px);
}

.phone-back {
  right: 34%;
  z-index: 1;
  transform: rotate(-6deg);
}

.phone-front {
  right: -1%;
  z-index: 2;
  transform: rotate(5deg);
}

.scroll-cue {
  position: absolute;
  bottom: 28px;
  left: 50%;
  z-index: 4;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transform: translateX(-50%);
}

.scroll-cue span:last-child {
  animation: cue-bob 1.8s ease-in-out infinite;
}

.intro {
  padding: 150px 0 138px;
  text-align: center;
}

.eyebrow {
  margin-bottom: 26px;
  color: var(--blue-600);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.intro h2 {
  max-width: 960px;
  margin: 0 auto 30px;
  font-size: clamp(42px, 6vw, 72px);
  font-weight: 720;
  line-height: 1.04;
  letter-spacing: -0.055em;
}

.intro > p:last-child {
  max-width: 700px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.7;
}

.story {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(420px, 1.14fr);
  align-items: center;
  gap: 80px;
  min-height: 820px;
  padding-top: 90px;
  padding-bottom: 90px;
}

.story-copy {
  max-width: 500px;
}

.story-number {
  margin-bottom: 28px;
  color: var(--blue-600);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.story h2,
.principles h2,
.download h2 {
  margin-bottom: 26px;
  font-size: clamp(42px, 5.4vw, 68px);
  font-weight: 720;
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.story-copy > p:not(.story-number) {
  margin-bottom: 30px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.7;
}

.story-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.story-list li {
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  font-weight: 750;
}

.story-visual {
  position: relative;
  display: grid;
  min-height: 680px;
  place-items: center;
}

.mountain-disc {
  position: absolute;
  width: min(100%, 660px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    linear-gradient(180deg, rgba(240, 249, 255, 0) 0 36%, #dcefff 36% 37%, transparent 37%),
    radial-gradient(circle at 50% 75%, #ffffff 0 21%, transparent 21.5%),
    linear-gradient(145deg, transparent 0 39%, rgba(92, 168, 239, 0.45) 39.5% 52%, transparent 52.5%),
    linear-gradient(215deg, transparent 0 42%, rgba(200, 231, 255, 0.9) 42.5% 59%, transparent 59.5%),
    linear-gradient(180deg, #eff9ff, #d8eeff);
}

.phone-story {
  position: relative;
  z-index: 2;
  width: min(340px, 70%);
  border-color: var(--navy-900);
  transform: rotate(3deg);
}

.story-during {
  position: relative;
  display: block;
  min-height: 940px;
  overflow: hidden;
  background:
    radial-gradient(circle at 77% 44%, rgba(35, 135, 255, 0.3), transparent 32%),
    linear-gradient(135deg, var(--navy-950), var(--navy-800));
  color: var(--white);
}

.story-during::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  content: "";
  -webkit-mask-image: linear-gradient(90deg, transparent, black);
  mask-image: linear-gradient(90deg, transparent, black);
}

.during-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(480px, 1.15fr);
  align-items: center;
  gap: 60px;
  min-height: 940px;
  padding-top: 100px;
  padding-bottom: 100px;
}

.story-copy-light > p:not(.story-number) {
  color: rgba(255, 255, 255, 0.7);
}

.story-copy-light .story-number {
  color: #78bdff;
}

.story-copy-light .story-list {
  border-color: rgba(255, 255, 255, 0.16);
}

.story-copy-light .story-list li {
  border-color: rgba(255, 255, 255, 0.16);
}

.during-devices {
  position: relative;
  height: 720px;
}

.during-phone {
  position: absolute;
  bottom: -90px;
  width: min(50%, 330px);
}

.during-phone-back {
  left: 0;
  z-index: 1;
  transform: rotate(-7deg);
}

.during-phone-front {
  right: 2%;
  z-index: 2;
  transform: rotate(6deg) translateY(-30px);
}

.story-after {
  grid-template-columns: minmax(420px, 1.14fr) minmax(0, 0.86fr);
}

.story-after .story-copy {
  grid-column: 2;
  grid-row: 1;
}

.visual-activity {
  grid-column: 1;
  grid-row: 1;
}

.visual-activity .phone-story {
  transform: rotate(-3deg);
}

.contour-lines {
  position: absolute;
  width: min(100%, 660px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    repeating-radial-gradient(
      ellipse at 40% 65%,
      transparent 0 24px,
      rgba(20, 119, 239, 0.14) 25px 27px,
      transparent 28px 46px
    ),
    var(--ice-100);
}

.principles {
  padding: 130px 0 110px;
  background: #061a3b;
  color: var(--white);
}

.eyebrow-light {
  color: #79bdff;
}

.principles-heading {
  max-width: 760px;
}

.principle-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 82px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.principle-list article {
  min-height: 270px;
  padding: 34px 38px 34px 0;
}

.principle-list article + article {
  padding-left: 38px;
  border-left: 1px solid rgba(255, 255, 255, 0.18);
}

.principle-list span {
  color: #72b9ff;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.14em;
}

.principle-list h3 {
  margin: 66px 0 14px;
  font-size: 25px;
  letter-spacing: -0.03em;
}

.principle-list p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.66);
  font-size: 15px;
  line-height: 1.65;
}

.safety-note {
  max-width: 760px;
  margin: 40px 0 0;
  color: rgba(255, 255, 255, 0.48);
  font-size: 12px;
  line-height: 1.7;
}

.download {
  position: relative;
  display: grid;
  min-height: 780px;
  overflow: hidden;
  place-items: center;
  background: var(--navy-900);
  color: var(--white);
  isolation: isolate;
}

.download-backdrop {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(rgba(3, 17, 45, 0.38), rgba(3, 17, 45, 0.78)),
    url("assets/alpine-hero.webp") center 64% / cover;
  transform: scale(1.04);
}

.download-inner {
  width: min(780px, calc(100% - 40px));
  text-align: center;
}

.download-inner > img {
  width: 96px;
  height: 96px;
  margin: 0 auto 28px;
  border-radius: 25px;
  box-shadow: 0 26px 60px rgba(1, 12, 34, 0.34);
}

.download h2 {
  margin-inline: auto;
}

.download-inner > p:not(.eyebrow) {
  margin: 0 auto 34px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 20px;
}

.store-status-large {
  min-height: 66px;
  margin-inline: auto;
  padding-inline: 24px;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  width: var(--shell);
  min-height: 130px;
  margin-inline: auto;
  color: var(--muted);
  font-size: 13px;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 850;
  letter-spacing: -0.04em;
}

.footer-brand img {
  border-radius: 11px;
}

.footer-links {
  display: flex;
  gap: 24px;
  font-weight: 700;
}

.site-footer > p {
  justify-self: end;
  margin: 0;
}

.js .reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

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

.legal-page {
  background: var(--ice-50);
}

.legal-header {
  position: sticky;
}

.legal-main {
  width: min(820px, calc(100% - 48px));
  margin-inline: auto;
  padding: 90px 0 120px;
}

.legal-main .eyebrow {
  margin-bottom: 20px;
}

.legal-main h1 {
  margin-bottom: 14px;
  font-size: clamp(46px, 7vw, 72px);
  line-height: 1;
  letter-spacing: -0.06em;
}

.legal-date {
  margin-bottom: 58px;
  color: var(--muted);
  font-weight: 700;
}

.legal-main h2 {
  margin: 48px 0 15px;
  font-size: 26px;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.legal-main p {
  color: #40526a;
  font-size: 17px;
  line-height: 1.78;
}

.legal-main a {
  color: var(--blue-600);
  font-weight: 750;
}

.legal-footer {
  border-top: 1px solid var(--line);
}

@keyframes hero-image-in {
  from {
    opacity: 0;
    transform: scale(1.14);
  }
  to {
    opacity: 1;
    transform: scale(1.06);
  }
}

@keyframes hero-copy-in {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes hero-devices-in {
  from {
    opacity: 0;
    transform: translateY(70px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes cue-bob {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(5px);
  }
}

@media (max-width: 980px) {
  :root {
    --shell: min(100% - 40px, 760px);
  }

  .site-nav {
    display: none;
  }

  .header-inner {
    grid-template-columns: 1fr auto;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    align-content: start;
    padding-top: 150px;
  }

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

  .hero-devices {
    width: min(100%, 660px);
    height: 590px;
    min-height: 0;
    margin: 10px auto 0;
  }

  .phone-back,
  .phone-front {
    bottom: -170px;
    width: min(42%, 290px);
  }

  .phone-back {
    right: 45%;
  }

  .phone-front {
    right: 10%;
  }

  .scroll-cue {
    display: none;
  }

  .story,
  .story-after,
  .during-inner {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .story {
    padding-top: 100px;
    padding-bottom: 0;
  }

  .story-copy {
    max-width: 620px;
  }

  .story-visual {
    min-height: 720px;
  }

  .during-inner {
    padding-top: 100px;
    padding-bottom: 0;
  }

  .during-devices {
    width: min(100%, 650px);
    height: 700px;
    margin-inline: auto;
  }

  .story-after .story-copy,
  .visual-activity {
    grid-column: 1;
  }

  .story-after .story-copy {
    grid-row: 1;
  }

  .visual-activity {
    grid-row: 2;
  }

  .principle-list {
    grid-template-columns: 1fr;
  }

  .principle-list article {
    min-height: 0;
    padding: 26px 0 30px;
  }

  .principle-list article + article {
    padding-left: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
    border-left: 0;
  }

  .principle-list h3 {
    margin: 28px 0 10px;
  }
}

@media (max-width: 640px) {
  :root {
    --shell: calc(100% - 32px);
  }

  .header-inner {
    min-height: 72px;
  }

  .brand {
    font-size: 21px;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .header-cta {
    padding: 9px 14px;
  }

  .hero {
    min-height: 920px;
  }

  .hero-vignette {
    background:
      linear-gradient(180deg, rgba(2, 14, 38, 0.85) 0%, rgba(4, 25, 60, 0.55) 48%, rgba(2, 13, 35, 0.7) 100%);
  }

  .hero-inner {
    min-height: 920px;
    padding-top: 116px;
  }

  .hero-product {
    font-size: 49px;
  }

  .hero-kicker {
    margin-bottom: 25px;
    font-size: 11px;
  }

  .hero h1 {
    max-width: 360px;
    font-size: clamp(47px, 15vw, 61px);
  }

  .hero-lead {
    font-size: 17px;
  }

  .hero-actions {
    align-items: stretch;
  }

  .button,
  .store-status {
    width: 100%;
  }

  .store-status {
    justify-content: center;
  }

  .hero-devices {
    height: 390px;
    margin-top: 36px;
  }

  .phone {
    border-width: 5px;
    border-radius: 34px;
  }

  .phone-back,
  .phone-front {
    bottom: -100px;
    width: min(54%, 230px);
  }

  .phone-back {
    right: 46%;
  }

  .phone-front {
    right: 2%;
  }

  .intro {
    padding: 100px 0 90px;
    text-align: left;
  }

  .intro h2 {
    font-size: 42px;
  }

  .intro > p:last-child {
    font-size: 17px;
  }

  .story {
    min-height: unset;
    padding-top: 80px;
  }

  .story h2,
  .principles h2,
  .download h2 {
    font-size: 41px;
  }

  .story-copy > p:not(.story-number) {
    font-size: 17px;
  }

  .story-visual {
    min-height: 580px;
  }

  .phone-story {
    width: min(285px, 78%);
  }

  .story-during,
  .during-inner {
    min-height: 880px;
  }

  .during-inner {
    padding-top: 80px;
  }

  .during-devices {
    height: 510px;
  }

  .during-phone {
    bottom: -90px;
    width: min(56%, 245px);
  }

  .during-phone-front {
    right: -2%;
  }

  .principles {
    padding: 92px 0 80px;
  }

  .principle-list {
    margin-top: 54px;
  }

  .download {
    min-height: 700px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 40px 0;
  }

  .footer-links {
    flex-direction: column;
    gap: 14px;
  }

  .site-footer > p {
    justify-self: start;
  }

  .legal-main {
    width: calc(100% - 32px);
    padding: 64px 0 90px;
  }

  .legal-main p {
    font-size: 16px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}