:root {
  color-scheme: light;
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", sans-serif;
  line-height: 1.5;
  font-weight: 400;
  color: #223046;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  margin: 0;
}

body {
  min-width: 320px;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0) 42%),
    linear-gradient(180deg, #cbe8ff 0%, #dcedff 34%, #edf5ff 68%, #f5f9ff 100%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

a,
button {
  font: inherit;
}

button {
  cursor: pointer;
}

.page-shell {
  position: relative;
  display: flex;
  min-height: 100vh;
  flex-direction: column;
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: 20px 20px 28px;
}

.top-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
  min-height: 44px;
}

.ghost-button,
.icon-link,
.carousel-button,
.close-button {
  border: 0;
  background: transparent;
  color: #5b6677;
  transition:
    color 160ms ease,
    background-color 160ms ease,
    transform 160ms ease,
    box-shadow 160ms ease;
}

.ghost-button {
  border-radius: 999px;
  padding: 8px 14px;
}

.ghost-button:hover,
.ghost-button:focus-visible,
.icon-link:hover,
.icon-link:focus-visible {
  color: #17212f;
  background: rgba(255, 255, 255, 0.54);
}

.icon-link {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 999px;
}

.icon-link svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.hero-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 22px;
  text-align: center;
}

.brand-mark {
  width: min(400px, 100%);
  display: block;
}

.hero-copy {
  margin: 22px 0 38px;
  font-size: clamp(1.3rem, 1rem + 1.5vw, 2rem);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: #2c3139;
}

.download-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.download-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 250px;
  min-height: 62px;
  padding: 0 28px;
  border-radius: 18px;
  background: linear-gradient(135deg, #f968a7 0%, #ff82c7 100%);
  color: #fff;
  text-decoration: none;
  font-size: 1.125rem;
  font-weight: 700;
  box-shadow: 0 18px 40px rgba(249, 104, 167, 0.25);
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    opacity 180ms ease;
}

.download-button:hover,
.download-button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 22px 48px rgba(249, 104, 167, 0.3);
}

.download-button[aria-disabled="true"] {
  opacity: 0.7;
  pointer-events: none;
  box-shadow: 0 12px 28px rgba(249, 104, 167, 0.2);
}

.download-button.is-loading::after {
  content: "";
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.45);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.download-meta {
  font-size: 0.95rem;
  opacity: 0.92;
}

.helper-text {
  min-height: 1.5em;
  margin: 0;
  font-size: 0.95rem;
  color: #68788f;
}

.showcase {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin: 42px auto 24px;
}

.carousel-button {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  font-size: 1.1rem;
}

.carousel-button:hover,
.carousel-button:focus-visible,
.close-button:hover,
.close-button:focus-visible {
  background: rgba(23, 33, 47, 0.08);
  color: #17212f;
}

.phone-frame {
  position: relative;
  width: min(300px, calc(100vw - 120px));
  padding: 18px 12px 18px;
  border: 1px solid rgba(32, 44, 66, 0.12);
  border-radius: 42px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(241, 244, 249, 0.96)),
    #f5f7fa;
  box-shadow:
    0 32px 64px rgba(130, 146, 166, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.phone-notch {
  width: 86px;
  height: 14px;
  margin: 0 auto 10px;
  border-radius: 999px;
  background: rgba(56, 69, 87, 0.18);
}

.screen-shell {
  overflow: hidden;
  border-radius: 28px;
  background: #fff;
}

.screen-image {
  display: block;
  width: 100%;
  min-height: 550px;
  object-fit: cover;
  object-position: top center;
}

.page-footer {
  display: flex;
  justify-content: center;
  margin-top: auto;
  color: #94a0b0;
  font-size: 0.8rem;
  user-select: none;
}

.changelog-dialog {
  width: min(92vw, 680px);
  max-height: min(78vh, 780px);
  padding: 24px 22px 22px;
  border: 0;
  border-radius: 22px;
  overflow: hidden;
  background: #fff;
  color: #223046;
  box-shadow: 0 30px 70px rgba(35, 45, 67, 0.28);
}

.changelog-dialog[open] {
  display: flex;
  flex-direction: column;
}

.changelog-dialog::backdrop {
  background: rgba(20, 28, 41, 0.42);
  backdrop-filter: blur(4px);
}

.dialog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.dialog-close-row {
  display: flex;
  margin: 0;
}

.close-button {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  font-size: 1.05rem;
}

.changelog-dialog h2 {
  margin: 0;
  font-size: 1.4rem;
}

.dialog-content {
  min-height: 0;
  flex: 1;
  overflow: auto;
  padding-right: 10px;
}

.dialog-state {
  margin: 6px 0;
  color: #6d7a8c;
}

.changelog-list {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.changelog-item {
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(34, 48, 70, 0.08);
}

.changelog-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.changelog-header {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
}

.changelog-version {
  font-size: 1.05rem;
  font-weight: 700;
}

.changelog-date {
  font-size: 0.92rem;
  color: #6d7a8c;
}

.changelog-points {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding-left: 20px;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 720px) {
  .page-shell {
    padding-inline: 14px;
  }

  .top-actions {
    gap: 6px;
  }

  .ghost-button {
    padding-inline: 10px;
  }

  .hero-copy {
    margin-bottom: 30px;
  }

  .showcase {
    gap: 8px;
  }

  .phone-frame {
    width: min(280px, calc(100vw - 92px));
  }

  .screen-image {
    min-height: 510px;
  }

  .download-button {
    min-width: 220px;
  }
}