:root {
  --black: #050607;
  --surface: #0c0e10;
  --surface-raised: #121519;
  --ink: #f5f7f9;
  --muted: #9ca4ad;
  --faint: #626b75;
  --line: rgb(255 255 255 / 10%);
  --blue: #2997ff;
  --blue-bright: #55adff;
  --green: #32d76c;
  --page-gutter: clamp(1.25rem, 5vw, 4.5rem);
  --content-width: 75rem;
  --header-height: 4.25rem;
  --section-pad: clamp(3.5rem, 7vw, 6rem);
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 1rem);
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--black);
  color: var(--ink);
  line-height: 1.5;
}

body,
button,
input {
  font: inherit;
}

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

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

h1,
h2,
h3,
p,
ol,
ul,
dl,
dd {
  margin: 0;
}

ol,
ul {
  padding: 0;
  list-style: none;
}

::selection {
  background: var(--blue);
  color: white;
}

:focus-visible {
  outline: 3px solid var(--blue-bright);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  inset-block-start: 0.75rem;
  inset-inline-start: 0.75rem;
  z-index: 1000;
  padding: 0.75rem 1rem;
  border-radius: 0.4rem;
  background: white;
  color: black;
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

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

.section-shell {
  width: min(100%, calc(var(--content-width) + (var(--page-gutter) * 2)));
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  border-bottom: 1px solid var(--line);
  background: rgb(5 6 7 / 78%);
  -webkit-backdrop-filter: blur(1.25rem) saturate(150%);
  backdrop-filter: blur(1.25rem) saturate(150%);
}

.site-nav {
  width: min(100%, calc(var(--content-width) + (var(--page-gutter) * 2)));
  height: var(--header-height);
  margin-inline: auto;
  padding-inline: var(--page-gutter);
  display: flex;
  align-items: center;
  gap: 2rem;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  min-height: 3rem;
}

.brand-logo {
  width: auto;
  height: 1.15rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 2.25rem);
  margin-inline-start: auto;
}

.nav-links a,
.nav-cta {
  min-height: 3rem;
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  font-size: 0.86rem;
  transition: color 180ms ease;
}

.nav-links a:hover,
.nav-cta:hover {
  color: var(--ink);
}

.nav-cta {
  margin-inline-start: 0.5rem;
  color: var(--blue-bright);
}

.hero {
  position: relative;
  width: min(100%, calc(var(--content-width) + (var(--page-gutter) * 2)));
  min-height: min(100svh, 48rem);
  margin-inline: auto;
  padding: calc(var(--header-height) + clamp(2.5rem, 6vh, 4.5rem)) var(--page-gutter) clamp(2.5rem, 6vh, 4rem);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(19rem, 0.8fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-ambient {
  position: absolute;
  inset: -20% -10% -10% 35%;
  background: radial-gradient(circle at 55% 48%, rgb(41 151 255 / 14%), transparent 42%);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 2;
  width: min(100%, 44rem);
  justify-self: start;
  animation: hero-enter 900ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.eyebrow,
.section-kicker {
  color: var(--blue-bright);
  font-size: 0.73rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-block-end: 1.5rem;
  color: var(--muted);
}

.eyebrow span {
  width: 0.45rem;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 1rem rgb(50 215 108 / 60%);
  animation: status-pulse 2.4s ease-in-out infinite;
}

.hero h1 {
  max-width: 12ch;
  font-size: clamp(3.2rem, 6vw, 6rem);
  font-weight: 650;
  letter-spacing: -0.065em;
  line-height: 0.94;
}

.hero h1 em,
.statement h2 em {
  color: var(--muted);
  font-style: normal;
  font-weight: 420;
}

.hero-description {
  max-width: 34rem;
  margin-block-start: 1.5rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
  font-weight: 350;
  line-height: 1.6;
}

.hero-actions {
  margin-block-start: 2rem;
  display: flex;
  align-items: center;
  gap: 1.75rem;
  flex-wrap: wrap;
}

.button {
  min-height: 3.25rem;
  padding: 0.85rem 1.4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 620;
  transition: background 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.button-primary {
  background: var(--blue);
  color: white;
  box-shadow: 0 0 0 rgb(41 151 255 / 0%);
}

.button-primary:hover {
  background: var(--blue-bright);
  transform: translateY(-2px);
  box-shadow: 0 0.75rem 2rem rgb(41 151 255 / 20%);
}

.text-link {
  min-height: 3rem;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--muted);
  font-size: 0.94rem;
  transition: color 180ms ease;
}

.text-link:hover {
  color: white;
}

.hero-product {
  position: relative;
  z-index: 1;
  width: min(34vw, 31rem);
  aspect-ratio: 1;
  justify-self: center;
  overflow: hidden;
  border-radius: clamp(1rem, 2vw, 2rem);
  box-shadow: 0 2rem 5rem rgb(0 0 0 / 35%);
  animation: product-enter 1.2s 120ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero-product-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-index {
  position: absolute;
  inset: auto var(--page-gutter) 2rem auto;
  color: var(--faint);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
}

.statement {
  padding-block: var(--section-pad);
}

.statement .section-kicker {
  display: block;
  margin-block-end: 1.1rem;
}

.statement h2 {
  max-width: 18ch;
  font-size: clamp(2.6rem, 5vw, 5rem);
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.statement > p:last-child {
  max-width: 46rem;
  margin-block-start: 1.5rem;
  color: var(--muted);
  font-size: clamp(1.1rem, 1.8vw, 1.35rem);
}

.features,
.specifications,
.use-cases {
  padding-block: var(--section-pad);
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: end;
  margin-block-end: clamp(2.5rem, 4vw, 3.5rem);
}

.section-heading h2,
.airflow h2,
.battery h2,
.interest h2 {
  margin-block-start: 0.85rem;
  font-size: clamp(2.5rem, 4.5vw, 4.4rem);
  letter-spacing: -0.055em;
  line-height: 1;
}

.section-heading > p,
.airflow-copy > p:last-child,
.battery-copy > p:last-child,
.interest-copy > p:last-child {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.65;
}

.feature-list {
  border-top: 1px solid var(--line);
}

.feature-item {
  padding-block: 1.65rem;
  display: grid;
  grid-template-columns: 3rem 4rem minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 3rem);
  align-items: start;
  border-bottom: 1px solid var(--line);
  transition: padding-inline 220ms ease, background 220ms ease;
}

.feature-item:hover {
  padding-inline: 1rem;
  background: linear-gradient(90deg, rgb(41 151 255 / 6%), transparent 70%);
}

.feature-number {
  color: var(--faint);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

.feature-icon {
  font-size: 1.8rem;
  filter: grayscale(1);
  opacity: 0.8;
}

.feature-item h3 {
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  letter-spacing: -0.025em;
}

.feature-item p {
  max-width: 38rem;
  margin-block-start: 0.65rem;
  color: var(--muted);
}

.airflow {
  position: relative;
  min-height: clamp(20rem, 42vh, 27rem);
  padding-block: clamp(3rem, 6vw, 5rem);
  display: grid;
  place-items: center;
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: radial-gradient(ellipse at center, rgb(41 151 255 / 9%), transparent 55%);
}

.airflow-copy {
  position: relative;
  z-index: 2;
  text-align: center;
}

.airflow-copy > p:last-child {
  max-width: 43rem;
  margin: 1.5rem auto 0;
}

.airflow-lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.airflow-lines span {
  position: absolute;
  inset-block-start: calc(22% + (var(--line-index) * 9%));
  inset-inline-start: -10%;
  width: 30%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgb(85 173 255 / 55%), transparent);
  animation: line-flow 4.2s calc(var(--line-index) * -520ms) linear infinite;
}

.spec-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.spec-item {
  min-width: 0;
  padding: clamp(1.5rem, 2.5vw, 2rem);
  background: var(--black);
}

.spec-item dt,
.battery-stats dt {
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.spec-item dd {
  margin-block-start: 0.75rem;
  font-size: clamp(2.4rem, 4vw, 3.6rem);
  font-weight: 650;
  letter-spacing: -0.06em;
  white-space: nowrap;
}

.spec-item dd span,
.battery-stats dd span {
  margin-inline-start: 0.3em;
  color: var(--muted);
  font-size: 0.35em;
  font-weight: 450;
  letter-spacing: 0;
}

.battery {
  padding-block: var(--section-pad);
  display: grid;
  grid-template-columns: 1.2fr 0.7fr 0.8fr;
  gap: clamp(2.5rem, 5vw, 5rem);
  align-items: center;
}

.battery-copy > p:last-child {
  max-width: 35rem;
  margin-block-start: 1.5rem;
}

.battery-display {
  position: relative;
  width: 8.5rem;
  height: 15rem;
  justify-self: center;
}

.battery-terminal {
  width: 3.25rem;
  height: 0.8rem;
  margin-inline: auto;
  border-radius: 0.3rem 0.3rem 0 0;
  background: #343a41;
}

.battery-body {
  position: relative;
  height: 14rem;
  overflow: hidden;
  border: 2px solid rgb(255 255 255 / 22%);
  border-radius: 0.85rem;
  background: #090b0d;
}

.battery-charge {
  position: absolute;
  inset: auto 0 0;
  height: 75%;
  background: linear-gradient(180deg, var(--green), #138c42);
  box-shadow: 0 0 2rem rgb(50 215 108 / 30%);
  animation: charge-breathe 3.4s ease-in-out infinite;
}

.battery-display > span {
  position: absolute;
  inset: 50% 0 auto;
  z-index: 2;
  color: white;
  font-size: 1.15rem;
  font-weight: 700;
  text-align: center;
  text-shadow: 0 1px 8px rgb(0 0 0 / 40%);
}

.battery-stats {
  display: grid;
  gap: 2rem;
}

.battery-stats > div {
  padding-block-end: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.battery-stats dd {
  margin-block-start: 0.4rem;
  color: var(--green);
  font-size: 2.25rem;
  font-weight: 650;
  letter-spacing: -0.04em;
}

.use-case-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-block: 1px solid var(--line);
}

.use-case-list li {
  min-height: 12rem;
  padding: clamp(1.75rem, 3vw, 2.75rem);
  border-bottom: 1px solid var(--line);
}

.use-case-list li:nth-child(odd) {
  border-inline-end: 1px solid var(--line);
}

.use-case-list li:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.use-case-list span {
  color: var(--blue-bright);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
}

.use-case-list h3 {
  margin-block-start: 1rem;
  font-size: clamp(1.5rem, 2.8vw, 2.25rem);
  letter-spacing: -0.035em;
}

.use-case-list p {
  max-width: 31rem;
  margin-block-start: 1rem;
  color: var(--muted);
}

.interest {
  position: relative;
  padding-block: var(--section-pad);
  overflow: hidden;
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.interest::before {
  content: "";
  position: absolute;
  width: 55rem;
  aspect-ratio: 1;
  inset: -80% auto auto 55%;
  border-radius: 50%;
  background: radial-gradient(circle, rgb(41 151 255 / 14%), transparent 67%);
  pointer-events: none;
}

.interest-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 8vw, 8rem);
  align-items: end;
}

.interest-copy > p:last-child {
  max-width: 34rem;
  margin-block-start: 1.5rem;
}

.signup-panel {
  min-height: 10rem;
  display: flex;
  align-items: center;
}

.signup-form,
.form-field {
  width: 100%;
}

.form-field label {
  display: inline-block;
  margin-block-end: 0.6rem;
  font-size: 0.84rem;
  font-weight: 600;
}

.form-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.65rem;
}

.form-row input {
  width: 100%;
  min-height: 3.5rem;
  padding: 0.8rem 1rem;
  border: 1px solid rgb(255 255 255 / 19%);
  border-radius: 0.65rem;
  background: rgb(255 255 255 / 5%);
  color: white;
  font-size: 1rem;
  transition: border-color 160ms ease, background 160ms ease;
}

.form-row input:hover,
.form-row input:focus {
  border-color: var(--blue-bright);
  background: rgb(255 255 255 / 8%);
}

.form-row input::placeholder {
  color: #78818b;
}

.form-privacy {
  margin-block-start: 0.75rem;
  color: var(--faint);
  font-size: 0.78rem;
}

.form-errors {
  margin-block-end: 1rem;
  padding: 0.75rem 1rem;
  border-inline-start: 3px solid #ff6b6b;
  background: rgb(255 107 107 / 8%);
  color: #ffb3b3;
  font-size: 0.9rem;
}

.field_with_errors {
  display: contents;
}

.form-notice {
  width: 100%;
  padding: 1.5rem;
  border-inline-start: 3px solid var(--green);
  background: rgb(50 215 108 / 8%);
  color: #a7f1c0;
  font-size: 1.05rem;
}

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

.footer-inner {
  min-height: 7rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  color: var(--faint);
  font-size: 0.78rem;
}

.footer-logo {
  width: auto;
  height: 0.95rem;
  opacity: 0.52;
}

.footer-inner a {
  min-height: 3rem;
  display: inline-flex;
  align-items: center;
  transition: color 180ms ease;
}

.footer-inner a:hover {
  color: var(--ink);
}

@keyframes hero-enter {
  from { opacity: 0; transform: translateY(2rem); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes product-enter {
  from { opacity: 0; transform: scale(0.78) rotate(-12deg); }
  to { opacity: 1; transform: scale(1) rotate(0); }
}

@keyframes status-pulse {
  50% { opacity: 0.42; transform: scale(0.78); }
}

@keyframes line-flow {
  from { transform: translateX(0) scaleX(0.5); opacity: 0; }
  20% { opacity: 0.75; }
  to { transform: translateX(450%) scaleX(1.4); opacity: 0; }
}

@keyframes charge-breathe {
  50% { height: 94%; }
}

@media (max-width: 850px) {
  .nav-links {
    display: none;
  }

  .nav-cta {
    margin-inline-start: auto;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-block-end: 4rem;
  }

  .hero-copy {
    justify-self: start;
  }

  .hero-product {
    width: min(85vw, 29rem);
    justify-self: center;
  }

  .hero-index {
    display: none;
  }

  .statement,
  .section-heading,
  .battery,
  .interest-inner {
    grid-template-columns: 1fr;
  }

  .statement > p:last-child {
    grid-column: 1;
  }

  .section-heading {
    gap: 1.5rem;
    align-items: start;
  }

  .spec-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .battery-display {
    justify-self: start;
  }
}

@media (max-width: 560px) {
  :root {
    --header-height: 4rem;
  }

  .nav-cta {
    font-size: 0.8rem;
  }

  .hero h1 {
    font-size: clamp(3rem, 15vw, 4.4rem);
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 0.6rem;
  }

  .text-link {
    justify-content: center;
  }

  .feature-item {
    grid-template-columns: 2rem 1fr;
  }

  .feature-icon {
    display: none;
  }

  .spec-item {
    padding-inline: 0.75rem;
  }

  .spec-item dd {
    font-size: 2.5rem;
  }

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

  .use-case-list li,
  .use-case-list li:nth-child(odd),
  .use-case-list li:nth-last-child(-n + 2) {
    min-height: auto;
    border-inline-end: 0;
    border-bottom: 1px solid var(--line);
  }

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

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    padding-block: 1.75rem;
    align-items: flex-start;
    flex-direction: column;
    gap: 0.5rem;
  }
}

@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;
  }
}