:root {
  --bg0: #070a12;
  --bg1: #0b1020;
  --card: rgba(255, 255, 255, 0.06);
  --card2: rgba(255, 255, 255, 0.08);
  --stroke: rgba(255, 255, 255, 0.12);
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.68);
  --faint: rgba(255, 255, 255, 0.5);
  --shadow: 0 20px 70px rgba(0, 0, 0, 0.55);
  --shadow2: 0 16px 44px rgba(0, 0, 0, 0.45);
  --radius: 16px;
  --radius2: 22px;
  --container: 1120px;
  --accent: #8b5cf6;
  --accent2: #22d3ee;
  --accent3: #34d399;
  --warn: #fbbf24;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(1100px 600px at 20% 10%, rgba(139, 92, 246, 0.22), transparent 55%),
    radial-gradient(900px 540px at 70% 20%, rgba(34, 211, 238, 0.18), transparent 55%),
    radial-gradient(900px 600px at 40% 90%, rgba(52, 211, 153, 0.12), transparent 60%),
    linear-gradient(180deg, var(--bg0), var(--bg1) 55%, #070a12);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI",
    "Helvetica Neue", Arial, "Noto Sans", "Hiragino Sans", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.95em;
  color: rgba(255, 255, 255, 0.86);
}

.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 10px;
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.85);
  border: 1px solid var(--stroke);
  border-radius: 10px;
  z-index: 9999;
}
.skip:focus {
  left: 12px;
}

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 10, 18, 0.58);
  backdrop-filter: blur(18px) saturate(120%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.topbar__inner {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 12px;
}
.brand:hover {
  background: rgba(255, 255, 255, 0.04);
}
.brand__mark {
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.45));
}
.brand__name {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav {
  display: none;
  gap: 14px;
  margin-left: 8px;
}
.nav__link {
  color: var(--muted);
  padding: 10px 10px;
  border-radius: 10px;
  font-size: 14px;
}
.nav__link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.topbar__cta {
  margin-left: auto;
  display: flex;
  gap: 10px;
  align-items: center;
}

/* Language toggle */
.lang {
  display: inline-flex;
  gap: 6px;
  padding: 4px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.02);
}
.lang__btn {
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.70);
  font-weight: 800;
  font-size: 12px;
  padding: 8px 10px;
  border-radius: 12px;
  cursor: pointer;
}
.lang__btn:hover {
  color: rgba(255, 255, 255, 0.92);
  background: rgba(255, 255, 255, 0.04);
}
.lang__btn.is-active {
  color: rgba(255, 255, 255, 0.92);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

/* Buttons */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}
.button:hover {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.18);
}
.button:active {
  transform: translateY(0px);
}
.button--primary {
  border-color: rgba(139, 92, 246, 0.5);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.92), rgba(34, 211, 238, 0.72));
  box-shadow: 0 16px 40px rgba(139, 92, 246, 0.22);
}
.button--primary:hover {
  border-color: rgba(255, 255, 255, 0.24);
}
.button--ghost {
  background: rgba(255, 255, 255, 0.02);
}
.button--lg {
  padding: 12px 16px;
  border-radius: 14px;
  font-size: 15px;
}

/* Hero */
.hero {
  position: relative;
  padding: 64px 0 42px;
}
.hero__grid {
  display: grid;
  gap: 28px;
  align-items: center;
}
.hero__copy {
  position: relative;
  z-index: 2;
}

.pill--muted {
  color: rgba(255, 255, 255, 0.72);
}

.hero__title {
  margin: 0;
  font-size: clamp(34px, 4.2vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.hero__lead {
  margin: 18px 0 22px;
  color: var(--muted);
  font-size: 16px;
  max-width: 58ch;
}
.hero__lead strong {
  color: rgba(255, 255, 255, 0.92);
  font-weight: 700;
}
.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.hero__meta {
  margin-top: 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  max-width: 720px;
}
.meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.meta__label {
  color: rgba(255, 255, 255, 0.64);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.03em;
}
.meta__value {
  font-weight: 600;
  color: rgba(255, 255, 255, 0.88);
}

.hero__visual {
  position: relative;
  z-index: 2;
}
.hero__bg {
  position: absolute;
  inset: -200px -200px -120px -200px;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(900px 520px at 40% 40%, rgba(139, 92, 246, 0.18), transparent 55%),
    radial-gradient(880px 560px at 70% 50%, rgba(34, 211, 238, 0.14), transparent 58%),
    radial-gradient(900px 560px at 40% 75%, rgba(52, 211, 153, 0.1), transparent 60%);
  filter: blur(14px);
  opacity: 0.9;
}

/* Panel mock */
.panel-mock {
  border-radius: var(--radius2);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.04));
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: translateY(0);
  will-change: transform;
}
.panel-mock__chrome {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  background: rgba(0, 0, 0, 0.35);
  border-bottom: 1px solid rgba(255, 255, 255, 0.10);
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  opacity: 0.85;
}
.dot--r { background: #ff5f56; }
.dot--y { background: #ffbd2e; }
.dot--g { background: #27c93f; }
.panel-mock__title {
  margin-left: 10px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.panel-mock__body {
  padding: 14px;
  display: grid;
  gap: 10px;
}
.panel-mock__hint {
  padding: 10px 14px 14px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
}

.card {
  position: relative;
  padding: 14px 14px 14px 52px;
  border-radius: 16px;
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow2);
}
.card--active {
  border-color: rgba(139, 92, 246, 0.45);
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.16), rgba(0, 0, 0, 0.24));
}
.card__badge {
  position: absolute;
  left: 12px;
  top: 12px;
  width: 30px;
  height: 30px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
}
.card__title {
  font-weight: 800;
  letter-spacing: 0.01em;
  margin-bottom: 4px;
}
.card__text {
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
}

/* Sections */
.section {
  padding: 54px 0;
  position: relative;
}
.section--alt {
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.section__title {
  margin: 0;
  font-size: 26px;
  letter-spacing: -0.01em;
}
.section__lead {
  margin: 10px 0 24px;
  color: var(--muted);
  max-width: 72ch;
}

.grid {
  display: grid;
  gap: 12px;
}
.grid--3 {
  grid-template-columns: 1fr;
}
.grid--2 {
  grid-template-columns: 1fr;
}

.feature {
  padding: 16px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.feature__icon {
  width: fit-content;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.25);
  color: rgba(255, 255, 255, 0.86);
  font-weight: 800;
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}
.feature__title {
  font-weight: 800;
  margin-bottom: 6px;
}
.feature__text {
  color: var(--muted);
  font-size: 14px;
}

/* Steps */
.steps {
  display: grid;
  gap: 10px;
}
.step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 12px;
  padding: 14px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}
.step__num {
  height: 44px;
  width: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 900;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.65), rgba(34, 211, 238, 0.35));
  border: 1px solid rgba(255, 255, 255, 0.14);
}
.step__title {
  font-weight: 900;
  margin-bottom: 4px;
}
.step__text {
  margin: 0;
  color: var(--muted);
}

/* Callouts & lists */
.callout {
  margin-top: 18px;
  padding: 16px;
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.10);
}
.callout__title {
  font-weight: 900;
  margin-bottom: 10px;
}
.callout__note {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
}

.list {
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
}
.list li {
  margin: 6px 0;
}
.list--ordered {
  padding-left: 20px;
}

/* Code box */
.code {
  position: relative;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(0, 0, 0, 0.35);
  overflow: hidden;
}
.code pre {
  margin: 0;
  padding: 14px 14px 14px 14px;
  overflow-x: auto;
}
.code__copy {
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.86);
  font-weight: 700;
  cursor: pointer;
}
.code__copy:hover {
  background: rgba(255, 255, 255, 0.06);
}

/* Download */
.download {
  display: grid;
  gap: 12px;
  margin-top: 10px;
}
.download__cta {
  padding: 18px;
  border-radius: var(--radius2);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.16), rgba(34, 211, 238, 0.08));
  box-shadow: var(--shadow2);
  transition: transform 140ms ease, border-color 140ms ease;
}
.download__cta:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.18);
}
.download__cta--ghost {
  background: rgba(255, 255, 255, 0.03);
}
.download__title {
  font-weight: 900;
  font-size: 16px;
  margin-bottom: 6px;
}
.download__text {
  color: rgba(255, 255, 255, 0.74);
  margin-bottom: 8px;
}
.download__hint {
  color: rgba(255, 255, 255, 0.52);
  font-size: 12px;
}
.fineprint {
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.60);
  font-size: 13px;
}

/* Footer */
.footer {
  padding: 22px 0 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(0, 0, 0, 0.18);
}
.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}
.footer__brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
}
.footer__meta {
  color: rgba(255, 255, 255, 0.56);
  font-size: 13px;
  margin-top: 6px;
}
.footer__right {
  display: inline-flex;
  gap: 12px;
  align-items: center;
}
.footer__link {
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
  padding: 10px 10px;
  border-radius: 12px;
}
.footer__link:hover {
  color: rgba(255, 255, 255, 0.88);
  background: rgba(255, 255, 255, 0.04);
}

/* Card2 */
.card2 {
  padding: 16px;
  border-radius: var(--radius2);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.03);
  box-shadow: var(--shadow2);
}
.card2--muted {
  background: rgba(255, 255, 255, 0.02);
}
.card2__title {
  font-weight: 900;
  margin-bottom: 10px;
}

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(14px);
  color: rgba(255, 255, 255, 0.92);
  box-shadow: 0 14px 50px rgba(0, 0, 0, 0.55);
  max-width: min(540px, calc(100% - 24px));
  z-index: 999;
}

/* Responsive */
@media (min-width: 820px) {
  .nav {
    display: flex;
  }
  .hero__grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 26px;
  }
  .hero {
    padding: 76px 0 56px;
  }
  .hero__meta {
    grid-template-columns: 1fr 1fr;
  }
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid--2 {
    grid-template-columns: 1fr 1fr;
  }
  .download {
    grid-template-columns: 1fr 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .button,
  .download__cta {
    transition: none;
  }
  .button:hover,
  .download__cta:hover {
    transform: none;
  }
}