:root {
  --color-bg: #041a31;
  --color-bg-soft: #082746;
  --color-surface: #0b3158;
  --color-surface-strong: #104b7a;
  --color-card: rgba(12, 50, 88, 0.82);
  --color-text: #f4fbff;
  --color-muted: #b8d3e8;
  --color-accent: #35b8ff;
  --color-accent-2: #54e3bd;
  --color-warning: #ffd166;
  --shadow-soft: 0 20px 60px rgba(0, 0, 0, 0.28);
  --shadow-card: 0 16px 36px rgba(0, 8, 20, 0.22);
  --radius-sm: 0.85rem;
  --radius-md: 1.25rem;
  --radius-lg: 1.75rem;
  --radius-pill: 999px;
  --container: 1180px;
  --section-space: clamp(3.5rem, 8vw, 7rem);
  --gap: clamp(1rem, 3vw, 2rem);
  --transition: 180ms ease;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at top left, rgba(53, 184, 255, 0.22), transparent 34rem),
    linear-gradient(180deg, #03172b 0%, var(--color-bg) 48%, #02101f 100%);
  color: var(--color-text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

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

p {
  margin-bottom: 0;
  color: var(--color-muted);
}

h1,
h2,
h3 {
  line-height: 1.08;
  letter-spacing: -0.04em;
}

h1 {
  max-width: 12ch;
  margin-bottom: 1.1rem;
  font-size: clamp(2.45rem, 12vw, 5.9rem);
}

h2 {
  margin-bottom: 1rem;
  font-size: clamp(2rem, 7vw, 4rem);
}

h3 {
  margin-bottom: 0.65rem;
  font-size: clamp(1.15rem, 4vw, 1.55rem);
}

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

.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;
}

.container {
  width: min(100% - clamp(1rem, 5vw, 3rem), var(--container));
  margin-inline: auto;
}

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

.eyebrow {
  margin-bottom: 0.85rem;
  color: var(--color-accent-2);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(4, 26, 49, 0.82);
  backdrop-filter: blur(18px);
}

.nav {
  display: flex;
  min-height: 4.75rem;
  align-items: center;
  justify-content: flex-start;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  margin-right: auto;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.logo__text {
  font-size: 1.12rem;
}

.language-switcher {
  position: relative;
  z-index: 22;
  display: inline-flex;
  flex: 0 0 auto;
  padding: 0.25rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.06);
}

.language-switcher__button {
  min-width: 2.35rem;
  min-height: 2rem;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-muted);
  font-size: 0.78rem;
  font-weight: 900;
  transition:
    background var(--transition),
    color var(--transition);
}

.language-switcher__button.is-active {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  color: #03213a;
}

.nav__toggle {
  position: relative;
  z-index: 22;
  display: inline-flex;
  width: 2.85rem;
  height: 2.85rem;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 0.95rem;
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text);
}

.nav__toggle span:not(.visually-hidden) {
  width: 1.2rem;
  height: 2px;
  border-radius: var(--radius-pill);
  background: currentColor;
  transition:
    transform var(--transition),
    opacity var(--transition);
}

.nav__toggle.is-active span:nth-child(2) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle.is-active span:nth-child(3) {
  opacity: 0;
}

.nav__toggle.is-active span:nth-child(4) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav__list {
  position: fixed;
  inset: 0;
  z-index: 21;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
  gap: 0.75rem;
  padding: 6rem clamp(1rem, 6vw, 2rem) 2rem;
  margin: 0;
  list-style: none;
  background: rgba(3, 18, 34, 0.96);
  transform: translateX(100%);
  transition: transform 220ms ease;
}

.nav__list.is-open {
  transform: translateX(0);
}

.nav__list a {
  display: block;
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-weight: 750;
  transition:
    background var(--transition),
    color var(--transition),
    transform var(--transition);
}

.nav__list a:hover {
  background: rgba(255, 255, 255, 0.07);
  color: var(--color-text);
}

.nav__cta {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  color: #03213a !important;
}

.hero {
  position: relative;
  isolation: isolate;
  padding-top: clamp(3rem, 8vw, 6rem);
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.hero__bg::before,
.hero__bg::after {
  position: absolute;
  content: "";
  border-radius: 999px;
  filter: blur(8px);
}

.hero__bg::before {
  width: clamp(15rem, 48vw, 34rem);
  height: clamp(15rem, 48vw, 34rem);
  top: 3rem;
  right: -9rem;
  background: rgba(53, 184, 255, 0.2);
}

.hero__bg::after {
  width: clamp(10rem, 35vw, 25rem);
  height: clamp(10rem, 35vw, 25rem);
  bottom: 1rem;
  left: -8rem;
  background: rgba(84, 227, 189, 0.13);
}

.hero__grid {
  display: grid;
  gap: clamp(2rem, 8vw, 5rem);
  align-items: center;
}

.hero__lead {
  max-width: 43rem;
  font-size: clamp(1rem, 3.2vw, 1.2rem);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.6rem;
}

.button {
  display: inline-flex;
  min-height: 3.15rem;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.15rem;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-weight: 850;
  line-height: 1.2;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    border-color var(--transition),
    background var(--transition);
}

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

.button--primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-2));
  color: #03213a;
  box-shadow: 0 18px 34px rgba(53, 184, 255, 0.22);
}

.button--ghost {
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text);
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.7rem;
  padding: 0;
  margin: 1.6rem 0 0;
  list-style: none;
}

.hero__stats li {
  min-width: 0;
  padding: 0.85rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
}

.hero__stats strong,
.hero__stats span {
  display: block;
}

.hero__stats strong {
  color: var(--color-text);
  font-size: clamp(1.15rem, 5vw, 1.8rem);
  line-height: 1.1;
}

.hero__stats span {
  margin-top: 0.25rem;
  color: var(--color-muted);
  font-size: clamp(0.72rem, 2.6vw, 0.88rem);
}

.phone-card,
.signal-screen,
.intro__card,
.intro__note,
.feature-card,
.developer__grid,
.faq__item {
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: linear-gradient(180deg, rgba(12, 49, 88, 0.88), rgba(7, 37, 68, 0.88));
  box-shadow: var(--shadow-card);
}

.phone-card {
  width: min(100%, 27rem);
  padding: clamp(1rem, 4vw, 1.4rem);
  margin-inline: auto;
  border-radius: clamp(1.4rem, 6vw, 2rem);
}

.phone-card__status {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.phone-card__status span {
  width: 0.48rem;
  height: 0.48rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.34);
}

.app-panel {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.app-panel--hero {
  justify-content: space-between;
  min-height: 8.6rem;
  background:
    radial-gradient(circle at 72% 40%, rgba(84, 227, 189, 0.18), transparent 8rem),
    linear-gradient(135deg, rgba(53, 184, 255, 0.95), rgba(28, 126, 202, 0.88));
}

.app-panel--hero p,
.app-panel--hero small {
  color: #ecfbff;
}

.app-panel--hero p {
  margin-top: 0.35rem;
  font-weight: 800;
  line-height: 1.2;
}

.app-panel__pill {
  flex: 0 0 auto;
  border-radius: var(--radius-pill);
  padding: 0.65rem 0.85rem;
  background: rgba(3, 39, 70, 0.42);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
}

.wifi-icon {
  display: inline-block;
  width: 2.6rem;
  height: 2rem;
  background:
    radial-gradient(circle at 50% 92%, var(--color-accent) 0 0.22rem, transparent 0.24rem),
    radial-gradient(ellipse at 50% 100%, transparent 0 0.5rem, var(--color-accent) 0.52rem 0.72rem, transparent 0.75rem),
    radial-gradient(ellipse at 50% 100%, transparent 0 1rem, var(--color-accent) 1.02rem 1.22rem, transparent 1.25rem),
    radial-gradient(ellipse at 50% 100%, transparent 0 1.48rem, var(--color-accent) 1.5rem 1.72rem, transparent 1.75rem);
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1rem;
}

.app-grid span {
  min-height: 4.6rem;
  display: flex;
  align-items: center;
  padding: 0.9rem;
  border-radius: var(--radius-sm);
  background: rgba(7, 37, 68, 0.82);
  color: #eefaff;
  font-weight: 800;
  line-height: 1.15;
}

.intro {
  padding-top: 0;
}

.intro__grid {
  display: grid;
  gap: var(--gap);
}

.intro__card,
.intro__note {
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 5vw, 2rem);
}

.intro__card {
  background:
    linear-gradient(135deg, rgba(12, 49, 88, 0.94), rgba(12, 69, 113, 0.86)),
    var(--color-surface);
}

.intro__note {
  align-self: end;
  border-color: rgba(84, 227, 189, 0.25);
  background: rgba(84, 227, 189, 0.08);
}

.section-heading {
  max-width: 48rem;
  margin-bottom: clamp(1.6rem, 5vw, 3rem);
}

.features__grid {
  display: grid;
  gap: 1rem;
}

.feature-card {
  position: relative;
  overflow: hidden;
  min-height: 13rem;
  padding: clamp(1.1rem, 5vw, 1.55rem);
  border-radius: var(--radius-md);
  transition:
    transform var(--transition),
    border-color var(--transition),
    background var(--transition);
}

.feature-card::after {
  position: absolute;
  inset: auto -2.5rem -4rem auto;
  width: 8rem;
  height: 8rem;
  border-radius: 50%;
  background: rgba(53, 184, 255, 0.1);
  content: "";
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(53, 184, 255, 0.36);
}

.feature-card__icon {
  display: grid;
  width: 3.2rem;
  height: 3.2rem;
  place-items: center;
  margin-bottom: 1rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.08);
  font-size: 1.45rem;
}

.showcase {
  background: linear-gradient(180deg, transparent, rgba(3, 18, 34, 0.55), transparent);
}

.showcase__grid {
  display: grid;
  gap: clamp(2rem, 7vw, 4rem);
  align-items: center;
}

.showcase__visual {
  order: 2;
}

.showcase__content {
  order: 1;
}

.signal-screen {
  max-width: 25rem;
  padding: clamp(1rem, 4vw, 1.45rem);
  margin-inline: auto;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #06213d, #051c34);
}

.signal-screen__header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  font-size: clamp(1rem, 4vw, 1.18rem);
  line-height: 1.2;
}

.signal-screen__wave {
  position: relative;
  display: grid;
  width: min(100%, 14rem);
  min-height: 9.5rem;
  place-items: center;
  margin: 0 auto 1rem;
}

.signal-screen__wave::before {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 7.5rem;
  height: 7.5rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(53, 184, 255, 0.16), transparent 68%);
  transform: translate(-50%, -50%);
  content: "";
}

.signal-screen__wave span {
  position: absolute;
  border: 1px dashed rgba(255, 255, 255, 0.24);
  border-radius: 50%;
}

.signal-screen__wave span:nth-child(1) {
  width: 6.5rem;
  height: 6.5rem;
}

.signal-screen__wave span:nth-child(2) {
  width: 9rem;
  height: 9rem;
}

.signal-screen__wave span:nth-child(3) {
  width: 11.5rem;
  height: 11.5rem;
}

.signal-meter {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 0.45rem;
  width: 8.4rem;
  min-height: 5.8rem;
  padding: 1rem 1.05rem;
  border: 1px solid rgba(53, 184, 255, 0.28);
  border-radius: 1.25rem;
  background:
    linear-gradient(180deg, rgba(53, 184, 255, 0.18), rgba(84, 227, 189, 0.08)),
    rgba(7, 37, 68, 0.76);
  box-shadow: 0 18px 38px rgba(0, 10, 24, 0.22);
}

.signal-meter i {
  display: block;
  width: 0.72rem;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--color-accent), var(--color-accent-2));
  box-shadow: 0 0 18px rgba(53, 184, 255, 0.3);
}

.signal-meter i:nth-child(1) {
  height: 1.35rem;
}

.signal-meter i:nth-child(2) {
  height: 2.15rem;
}

.signal-meter i:nth-child(3) {
  height: 3rem;
}

.signal-meter i:nth-child(4) {
  height: 3.85rem;
}

.signal-screen .app-panel {
  align-items: center;
  gap: 0.85rem;
  padding: 1rem;
  border-radius: 1.15rem;
}

.signal-screen .app-panel .wifi-icon {
  flex: 0 0 auto;
}

.signal-screen .app-panel div {
  display: grid;
  min-width: 0;
  gap: 0.2rem;
}

.signal-screen .app-panel strong,
.signal-screen .app-panel small {
  display: block;
  line-height: 1.35;
}

.signal-screen .app-panel small {
  color: var(--color-text);
}

.signal-screen dl {
  display: grid;
  gap: 1.2rem;
  padding: clamp(1.15rem, 5vw, 1.55rem);
  margin: 1rem 0 0;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  text-align: center;
}

.signal-screen dt {
  color: var(--color-text);
  font-weight: 900;
}

.signal-screen dd {
  margin: 0.1rem 0 0;
  color: var(--color-muted);
}

.check-list {
  display: grid;
  gap: 0.8rem;
  padding: 0;
  margin: 1.4rem 0 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 2rem;
  color: var(--color-muted);
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 0.15rem;
  display: grid;
  width: 1.35rem;
  height: 1.35rem;
  place-items: center;
  border-radius: 50%;
  background: rgba(84, 227, 189, 0.14);
  color: var(--color-accent-2);
  content: "✓";
  font-size: 0.82rem;
  font-weight: 900;
}

.developer__grid {
  display: grid;
  gap: 1.3rem;
  align-items: center;
  border-radius: var(--radius-lg);
  padding: clamp(1.25rem, 5vw, 2.4rem);
}

.developer__avatar {
  display: grid;
  width: clamp(5.5rem, 25vw, 9rem);
  height: clamp(5.5rem, 25vw, 9rem);
  place-items: center;
  border-radius: 2rem;
  background:
    linear-gradient(135deg, rgba(53, 184, 255, 0.24), rgba(84, 227, 189, 0.16)),
    var(--color-surface);
  color: var(--color-text);
  font-weight: 950;
  letter-spacing: 0.08em;
}

.developer__details {
  display: grid;
  gap: 0.75rem;
  margin: 1.2rem 0 0;
}

.developer__details div {
  min-width: 0;
  padding: 0.85rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
}

.developer__details dt {
  color: var(--color-accent-2);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.developer__details dd {
  margin: 0.2rem 0 0;
  overflow-wrap: anywhere;
  color: var(--color-text);
  font-weight: 800;
}

.developer__details a {
  color: inherit;
}

.faq {
  padding-top: 0;
}

.faq__list {
  display: grid;
  gap: 0.8rem;
}

.faq__item {
  overflow: hidden;
  border-radius: var(--radius-md);
}

.faq__question {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border: 0;
  background: transparent;
  color: var(--color-text);
  text-align: left;
  font-weight: 850;
}

.faq__question span:not([aria-hidden]) {
  min-width: 0;
  flex: 1 1 auto;
}

.faq__question span[aria-hidden="true"] {
  display: grid;
  flex: 0 0 auto;
  width: 1.75rem;
  height: 1.75rem;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  transition: transform var(--transition);
}

.faq__question[aria-expanded="true"] span[aria-hidden="true"] {
  transform: rotate(45deg);
}

.faq__answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 220ms ease;
}

.faq__answer > p {
  overflow: hidden;
  padding: 0 1rem;
}

.faq__item.is-open .faq__answer {
  grid-template-rows: 1fr;
}

.faq__item.is-open .faq__answer > p {
  padding-bottom: 1rem;
}

@media (max-width: 359px) {
  .hero__stats {
    grid-template-columns: 1fr;
  }

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

  .button {
    width: 100%;
  }
}

@media (min-width: 430px) {
  .features__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

}

@media (min-width: 768px) {
  .nav__toggle {
    display: none;
  }

  .nav__list {
    position: static;
    order: 2;
    flex-direction: row;
    align-items: center;
    justify-content: flex-end;
    gap: 0.25rem;
    padding: 0;
    background: transparent;
    transform: none;
  }

  .language-switcher {
    order: 3;
  }

  .nav__list a {
    padding: 0.75rem 0.9rem;
    font-size: 0.94rem;
  }

  .hero__grid,
  .intro__grid,
  .showcase__grid,
  .developer__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  }

  .hero__content {
    min-width: 0;
  }

  .showcase__visual {
    order: 1;
  }

  .showcase__content {
    order: 2;
  }

  .developer__grid {
    grid-template-columns: auto minmax(0, 1fr);
  }
}

@media (min-width: 1024px) {
  .features__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .feature-card {
    min-height: 14.5rem;
  }

  .phone-card {
    transform: rotate(1.5deg);
  }
}

@media (min-width: 1280px) {
  .hero__grid {
    grid-template-columns: minmax(0, 1.04fr) minmax(24rem, 0.76fr);
  }

  .nav__list a {
    padding-inline: 1.05rem;
  }
}

@media (min-width: 1440px) {
  :root {
    --container: 1240px;
  }
}

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