:root {
  color-scheme: light;
  --ink: #1c1c1e;
  --muted: #68656f;
  --paper: #f7f7fa;
  --surface: rgba(255, 255, 255, 0.88);
  --line: rgba(43, 41, 50, 0.11);
  --pink: #f9809a;
  --purple: #9458e9;
  --blue: #4778f6;
  --focus: #315ee8;
  --shadow: 0 24px 70px rgba(68, 70, 122, 0.13);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Hiragino Sans",
    "Yu Gothic UI", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 88% -10%, rgba(71, 120, 246, 0.16), transparent 32rem),
    radial-gradient(circle at 8% 6%, rgba(249, 128, 154, 0.14), transparent 28rem),
    var(--paper);
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-color: var(--purple);
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus), transparent 45%);
  outline-offset: 3px;
}

.site-shell {
  width: min(100% - 32px, 1080px);
  margin: 0 auto;
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 760;
  letter-spacing: -0.025em;
  text-decoration: none;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 11px;
  box-shadow: 0 8px 24px rgba(83, 73, 161, 0.22);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.text-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
}

.text-nav a {
  text-decoration: none;
}

.text-nav a[aria-current="page"] {
  color: var(--ink);
}

.language-toggle {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
}

.language-toggle button {
  border: 0;
  border-radius: 999px;
  padding: 7px 10px;
  color: var(--muted);
  background: transparent;
  font: inherit;
  font-size: 0.75rem;
  font-weight: 760;
  cursor: pointer;
}

.language-toggle button[aria-pressed="true"] {
  color: var(--ink);
  background: #fff;
  box-shadow: 0 2px 8px rgba(31, 29, 42, 0.1);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: center;
  min-height: 600px;
  padding: 78px 0 96px;
  gap: 64px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 24px;
  color: var(--muted);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 30px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--pink), var(--blue));
  content: "";
}

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

h1 {
  max-width: 750px;
  margin-bottom: 24px;
  font-size: clamp(3rem, 7vw, 6.5rem);
  font-weight: 820;
  letter-spacing: -0.07em;
  line-height: 0.93;
}

.gradient-word {
  color: transparent;
  background: linear-gradient(110deg, var(--pink), var(--purple) 52%, var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
}

.lede {
  max-width: 650px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.75;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: 15px;
  padding: 0 18px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(65, 60, 96, 0.08);
  font-size: 0.94rem;
  font-weight: 740;
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.button.primary {
  border-color: transparent;
  color: #fff;
  background: linear-gradient(110deg, var(--purple), var(--blue));
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(65, 60, 96, 0.15);
}

.signal-card {
  position: relative;
  min-height: 380px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 42px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(245, 243, 255, 0.62));
  box-shadow: var(--shadow);
}

.signal-card::before {
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  inset: -80px -70px auto auto;
  background: linear-gradient(145deg, var(--pink), var(--blue));
  filter: blur(6px);
  opacity: 0.28;
  content: "";
}

.signal-topline {
  position: absolute;
  inset: 28px 28px auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 8px;
  border-radius: 50%;
  background: #38b86b;
  box-shadow: 0 0 0 5px rgba(56, 184, 107, 0.1);
}

.waveform {
  position: absolute;
  inset: 102px 28px 92px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
}

.waveform span {
  width: 7px;
  height: var(--height);
  min-height: 12px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--pink), var(--purple) 55%, var(--blue));
  transform-origin: center;
  animation: breathe 2.8s ease-in-out infinite;
  animation-delay: var(--delay);
}

.signal-caption {
  position: absolute;
  right: 28px;
  bottom: 28px;
  left: 28px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
}

.signal-caption strong {
  display: block;
  margin-bottom: 5px;
  font-size: 1.02rem;
}

.signal-caption span {
  color: var(--muted);
  font-size: 0.8rem;
}

.signal-caption img {
  width: 62px;
  height: 62px;
  border-radius: 17px;
  box-shadow: 0 10px 24px rgba(78, 72, 152, 0.22);
}

.feature-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.feature {
  padding: 34px 28px 38px;
}

.feature + .feature {
  border-left: 1px solid var(--line);
}

.feature-label {
  display: block;
  margin-bottom: 13px;
  color: var(--purple);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.7rem;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.feature h2 {
  margin-bottom: 10px;
  font-size: 1.15rem;
  letter-spacing: -0.025em;
}

.feature p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.91rem;
  line-height: 1.7;
}

.page-main {
  padding: 74px 0 110px;
}

.page-heading {
  max-width: 780px;
  margin-bottom: 58px;
}

.page-heading h1 {
  margin-bottom: 20px;
  font-size: clamp(2.8rem, 6vw, 5.4rem);
}

.document-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 700px);
  align-items: start;
  gap: 72px;
}

.document-meta {
  position: sticky;
  top: 24px;
  color: var(--muted);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.74rem;
  line-height: 1.75;
}

.document-meta strong {
  display: block;
  margin-bottom: 7px;
  color: var(--ink);
  font-family: inherit;
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.document-body {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: 0 18px 50px rgba(67, 64, 91, 0.08);
  backdrop-filter: blur(18px);
}

.document-section {
  padding: 34px 38px;
}

.document-section + .document-section {
  border-top: 1px solid var(--line);
}

.document-section h2 {
  margin-bottom: 14px;
  font-size: 1.24rem;
  letter-spacing: -0.025em;
}

.document-section h3 {
  margin: 24px 0 10px;
  font-size: 1rem;
}

.document-section p,
.document-section li {
  color: #4f4c56;
  font-size: 0.98rem;
  line-height: 1.8;
}

.document-section p:last-child,
.document-section ul:last-child {
  margin-bottom: 0;
}

.document-section ul {
  padding-left: 1.25rem;
}

.contact-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px;
  border-radius: 20px;
  color: #fff;
  background: linear-gradient(115deg, #8b54df, #4977ef);
}

.contact-panel strong {
  display: block;
  margin-bottom: 6px;
}

.contact-panel p {
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.88rem;
}

.contact-panel a {
  flex: 0 0 auto;
  border-radius: 12px;
  padding: 11px 14px;
  color: var(--ink);
  background: #fff;
  font-size: 0.86rem;
  font-weight: 760;
  text-decoration: none;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 116px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.8rem;
}

.site-footer nav {
  display: flex;
  gap: 18px;
}

[data-lang][hidden] {
  display: none !important;
}

@keyframes breathe {
  0%,
  100% {
    transform: scaleY(0.82);
    opacity: 0.72;
  }
  50% {
    transform: scaleY(1.06);
    opacity: 1;
  }
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    padding: 20px 0;
  }

  .header-actions {
    align-items: flex-end;
    flex-direction: column-reverse;
    gap: 10px;
  }

  .text-nav {
    font-size: 0.82rem;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 66px 0 82px;
    gap: 44px;
  }

  .signal-card {
    min-height: 330px;
  }

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

  .feature + .feature {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .document-layout {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .document-meta {
    position: static;
  }
}

@media (max-width: 560px) {
  .site-shell {
    width: min(100% - 24px, 1080px);
  }

  .brand span {
    display: none;
  }

  .text-nav {
    gap: 12px;
  }

  h1 {
    font-size: clamp(3rem, 18vw, 4.8rem);
  }

  .page-main {
    padding-top: 48px;
  }

  .document-section {
    padding: 28px 24px;
  }

  .contact-panel,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .contact-panel a {
    width: 100%;
    text-align: center;
  }

  .site-footer {
    justify-content: center;
    padding: 28px 0;
    gap: 12px;
  }
}

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

  .waveform span,
  .button {
    animation: none;
    transition: none;
  }
}