:root {
  --bg: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-strong: #ffffff;
  --line: rgba(129, 149, 172, 0.2);
  --line-strong: rgba(129, 149, 172, 0.34);
  --text: #101828;
  --text-soft: #5c6b7d;
  --blue: #0a6ef2;
  --navy: #0e1824;
  --shadow-soft: 0 24px 60px rgba(80, 104, 130, 0.12);
  --shadow-device: 0 38px 100px rgba(33, 45, 61, 0.26);
  --container: min(1380px, calc(100% - 32px));
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Instrument Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top center, rgba(134, 200, 255, 0.18), transparent 30%),
    linear-gradient(180deg, #fcfdff 0%, #f4f7fb 58%, #eef3f8 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.72), transparent 42%),
    radial-gradient(circle at bottom right, rgba(10, 110, 242, 0.07), transparent 24%);
}

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

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

button {
  font: inherit;
}

.page-shell {
  min-height: 100vh;
  overflow: clip;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(248, 251, 255, 0.74);
  border-bottom: 1px solid rgba(255, 255, 255, 0.64);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 84px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(232, 239, 247, 0.94));
  border: 1px solid rgba(255, 255, 255, 0.86);
  box-shadow: 0 12px 28px rgba(91, 113, 138, 0.14);
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  object-fit: cover;
}

.brand-name,
.hero h1 {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
}

.brand-name {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.site-nav a {
  color: var(--text-soft);
  font-size: 0.95rem;
  font-weight: 600;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
}

.nav-toggle {
  display: none;
  width: 52px;
  height: 52px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--navy);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.button:hover,
.button:focus-visible,
.demo-tab:hover,
.demo-tab:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  color: #ffffff;
  background: linear-gradient(135deg, #1280ff, #0a63ec);
  box-shadow: 0 18px 38px rgba(10, 99, 236, 0.24);
}

.button-secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.84);
  border-color: rgba(129, 149, 172, 0.18);
  box-shadow: 0 12px 28px rgba(103, 129, 160, 0.1);
}

.hero {
  padding: 56px 0 44px;
}

.hero-shell {
  display: grid;
  gap: 34px;
}

.hero-copy {
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
}

.hero-label,
.info-label {
  margin: 0;
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 16px 0 0;
  font-size: clamp(3.1rem, 8vw, 5.8rem);
  line-height: 0.98;
  letter-spacing: -0.06em;
}

.hero-subtitle {
  max-width: 720px;
  margin: 18px auto 0;
  color: var(--text-soft);
  font-size: clamp(1rem, 2vw, 1.22rem);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.product-demo {
  display: grid;
  gap: 18px;
}

.demo-tabs-wrap {
  display: grid;
  justify-items: center;
  gap: 10px;
}

.demo-tabs {
  display: flex;
  gap: 10px;
  max-width: 100%;
  overflow-x: auto;
  padding: 4px;
  scrollbar-width: none;
}

.demo-tabs::-webkit-scrollbar,
.screen-scroll::-webkit-scrollbar {
  display: none;
}

.demo-tab {
  flex: 0 0 auto;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid rgba(129, 149, 172, 0.2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--text-soft);
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  transition: color 180ms ease, border-color 180ms ease, background-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.demo-tab.is-active {
  color: #ffffff;
  background: linear-gradient(135deg, #1686ff, #0a63ec);
  border-color: transparent;
  box-shadow: 0 18px 34px rgba(10, 99, 236, 0.24);
}

.demo-hint {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.92rem;
}

.ipad-stage {
  padding: 18px;
  border-radius: 40px;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.94), rgba(239, 245, 250, 0.78)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.56), rgba(236, 242, 248, 0.72));
  box-shadow: var(--shadow-soft);
}

.ipad-device {
  position: relative;
  width: min(100%, 1240px);
  aspect-ratio: 1.74 / 1;
  margin: 0 auto;
  padding: clamp(14px, 2vw, 24px);
  border-radius: 46px;
  background: linear-gradient(180deg, #343c46, #121821 54%, #262d35 100%);
  box-shadow: var(--shadow-device);
}

.ipad-device::before {
  content: "";
  position: absolute;
  inset: 8px;
  border-radius: 40px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  pointer-events: none;
}

.ipad-camera {
  position: absolute;
  top: 50%;
  left: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  transform: translateY(-50%);
  background: radial-gradient(circle at 35% 35%, rgba(111, 218, 255, 0.72), rgba(11, 22, 34, 0.24) 34%, #04080c 70%);
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.04);
}

.ipad-screen-frame {
  height: 100%;
  overflow: hidden;
  border-radius: 30px;
  background: #edf2f7;
}

.ipad-screen-switcher {
  position: relative;
  height: 100%;
}

.ipad-screen-switcher.is-switching {
  animation: screenFade 320ms ease;
}

.screen-panel {
  display: none;
  height: 100%;
}

.screen-panel.is-active {
  display: block;
}

.screen-scroll {
  height: 100%;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
  background: #f2f5f9;
}

.screen-image {
  width: 100%;
  height: auto;
}

.info-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.info-card {
  padding: 18px 20px;
  border-radius: 22px;
  border: 1px solid rgba(129, 149, 172, 0.16);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 16px 30px rgba(125, 148, 173, 0.08);
}

.info-card p,
.footer-inner p,
.documentation-copy,
.doc-card p {
  margin: 10px 0 0;
  color: var(--text-soft);
  line-height: 1.65;
}

.documentation-section {
  padding: 18px 0 56px;
}

.documentation-header {
  max-width: 760px;
  margin: 0 auto 24px;
  text-align: center;
}

.documentation-header h2,
.doc-card h3 {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
}

.documentation-header h2 {
  margin: 16px 0 0;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.04;
  letter-spacing: -0.05em;
}

.documentation-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.doc-card {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding: 24px;
  border-radius: 26px;
  border: 1px solid rgba(129, 149, 172, 0.16);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(247, 250, 253, 0.78));
  box-shadow: 0 18px 36px rgba(112, 134, 158, 0.1);
}

.doc-card-copy {
  max-width: 34rem;
}

.doc-kicker {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(10, 110, 242, 0.08);
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.doc-card h3 {
  margin: 14px 0 0;
  font-size: 1.28rem;
  line-height: 1.15;
  letter-spacing: -0.04em;
}

.doc-button {
  flex: 0 0 auto;
}

.site-footer {
  padding: 10px 0 40px;
}

.footer-inner {
  text-align: center;
}

.footer-inner p {
  margin: 0;
  font-size: 0.95rem;
}

@keyframes screenFade {
  0% {
    opacity: 0.2;
    transform: translateY(8px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding: 18px;
    border: 1px solid rgba(129, 149, 172, 0.16);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 22px 48px rgba(96, 121, 151, 0.16);
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .ipad-device {
    min-height: 560px;
  }

  .info-strip {
    grid-template-columns: 1fr;
  }

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

  .doc-card {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .header-inner {
    min-height: 76px;
  }

  .hero {
    padding-top: 34px;
  }

  .hero h1 {
    font-size: clamp(2.4rem, 12vw, 3.8rem);
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .ipad-stage {
    padding: 10px;
    border-radius: 28px;
  }

  .ipad-device {
    padding: 10px;
    min-height: 460px;
    border-radius: 28px;
  }

  .ipad-device::before {
    inset: 5px;
    border-radius: 24px;
  }

  .ipad-camera {
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
  }

  .ipad-screen-frame {
    border-radius: 20px;
  }

  .demo-tabs-wrap {
    justify-items: stretch;
  }

  .demo-tabs {
    padding-bottom: 6px;
  }

  .demo-hint {
    text-align: center;
    font-size: 0.88rem;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}