:root {
  --bg: #eaf5ef;
  --bg-alt: #dceddf;
  --text: #123a31;
  --muted: #2e675a;
  --accent: #1d8a69;
  --accent-dark: #146a54;
  --accent-rgb: 29, 138, 105;
  --line: rgba(18, 58, 49, 0.15);
  --link-bg: rgba(255, 255, 255, 0.48);
  --link-color: var(--text);
  --store-text: #ecfff7;
  --store-grad-a: var(--accent);
  --store-grad-b: var(--accent-dark);
  --lang-switch-bg: rgba(255, 255, 255, 0.58);
  --lang-active-bg: color-mix(in srgb, var(--accent) 72%, #e9fff4 28%);
  --lang-active-text: #f0fff8;
  --hero-bg:
    radial-gradient(circle at 8% -12%, rgba(203, 246, 228, 0.72), transparent 40%),
    linear-gradient(110deg, rgba(255, 255, 255, 0.52), rgba(240, 255, 248, 0.35));
  --card-bg: rgba(248, 255, 252, 0.47);
  --copy: #29584d;
  --kicker: color-mix(in srgb, var(--accent-dark) 65%, #547c72 35%);
  --title: color-mix(in srgb, var(--accent-dark) 84%, #0d4135 16%);
  --tag-bg: rgba(246, 255, 251, 0.62);
  --tag-text: color-mix(in srgb, var(--accent-dark) 76%, #1f4f44 24%);
  --canvas-opacity: 0.36;
  --canvas-blend: normal;
  --canvas-filter: saturate(102%) contrast(102%);
  --entry-mask-a: color-mix(in srgb, var(--accent) 76%, #c9f4e3 24%);
  --entry-mask-b: color-mix(in srgb, var(--accent-dark) 80%, #0b4a3a 20%);
  --glow-one: rgba(127, 223, 189, 0.72);
  --glow-two: rgba(33, 152, 119, 0.56);
  --glow-three: rgba(76, 161, 134, 0.42);
}

:root.theme-dark {
  --bg: #06231d;
  --bg-alt: #0b332a;
  --text: #daf5ea;
  --muted: #9fd2c0;
  --accent: #8bd9be;
  --accent-dark: #b8f0db;
  --accent-rgb: 139, 217, 190;
  --line: rgba(197, 240, 224, 0.22);
  --link-bg: rgba(9, 43, 34, 0.66);
  --link-color: #dff9ee;
  --store-text: #05251d;
  --store-grad-a: #95e3c8;
  --store-grad-b: #64caa5;
  --lang-switch-bg: rgba(9, 43, 34, 0.7);
  --lang-active-bg: color-mix(in srgb, var(--accent) 74%, #dff9ee 26%);
  --lang-active-text: #063124;
  --hero-bg:
    radial-gradient(circle at 8% -12%, rgba(198, 245, 226, 0.18), transparent 46%),
    linear-gradient(110deg, rgba(9, 46, 37, 0.78), rgba(6, 34, 27, 0.66));
  --card-bg: rgba(9, 42, 34, 0.58);
  --copy: #c4ecde;
  --kicker: #9fdbc6;
  --title: #dff8ee;
  --tag-bg: rgba(12, 52, 41, 0.66);
  --tag-text: #cef4e6;
  --canvas-opacity: 0.6;
  --canvas-blend: screen;
  --canvas-filter: saturate(115%) contrast(112%);
  --entry-mask-a: color-mix(in srgb, var(--bg-alt) 76%, #1d6e58 24%);
  --entry-mask-b: color-mix(in srgb, #031610 84%, var(--bg) 16%);
  --glow-one: rgba(149, 227, 200, 0.28);
  --glow-two: rgba(86, 176, 145, 0.22);
  --glow-three: rgba(119, 212, 182, 0.18);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 0%, rgba(var(--accent-rgb), 0.2), transparent 44%),
    radial-gradient(circle at 88% 100%, rgba(var(--accent-rgb), 0.18), transparent 52%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.35s ease, color 0.35s ease;
}

.splash-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100svh;
  z-index: 1;
  pointer-events: none;
  opacity: var(--canvas-opacity);
  mix-blend-mode: var(--canvas-blend);
  filter: var(--canvas-filter);
  transition: opacity 0.35s ease, mix-blend-mode 0.35s ease, filter 0.35s ease;
}

body.is-transitioning {
  overflow: hidden;
}

.entry-mask {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: radial-gradient(
    circle at 50% 50%,
    var(--entry-mask-a),
    var(--entry-mask-b)
  );
  clip-path: circle(140% at 50% 50%);
  pointer-events: none;
}

.emerald-atmosphere {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.emerald-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(62px);
  opacity: 0.44;
}

.emerald-glow.one {
  width: 30rem;
  height: 30rem;
  top: -10rem;
  left: 20%;
  background: var(--glow-one);
}

.emerald-glow.two {
  width: 34rem;
  height: 34rem;
  top: -13rem;
  right: -9rem;
  background: var(--glow-two);
}

.emerald-glow.three {
  width: 24rem;
  height: 24rem;
  bottom: -9rem;
  right: 17%;
  background: var(--glow-three);
}

.app-shell {
  width: min(1120px, 92vw);
  margin: 0 auto;
  padding: clamp(1rem, 2vw, 1.4rem) 0 clamp(2.3rem, 6vw, 4.2rem);
  position: relative;
  z-index: 2;
}

.app-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.35rem;
}

.top-actions {
  display: inline-flex;
  align-items: center;
  gap: 0.62rem;
}

.back-link,
.store-link {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.35rem;
  padding: 0 1rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0.2rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--lang-switch-bg);
}

.lang-btn {
  border: 0;
  background: transparent;
  color: color-mix(in srgb, var(--muted) 72%, var(--text) 28%);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  min-height: 1.8rem;
  min-width: 2.1rem;
  border-radius: 999px;
  transition: background 0.22s ease, color 0.22s ease;
  cursor: pointer;
}

.lang-btn.is-active {
  background: var(--lang-active-bg);
  color: var(--lang-active-text);
}

.lang-btn:not(.is-active):hover {
  background: rgba(var(--accent-rgb), 0.16);
}

.theme-toggle {
  --toggle-shift: 1rem;
  width: 2.38rem;
  height: 1.42rem;
  padding: 0.12rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--lang-switch-bg) 78%, transparent);
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  cursor: pointer;
  transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 44%, transparent);
}

.theme-toggle:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 52%, transparent);
  outline-offset: 2px;
}

.theme-toggle-dot {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--accent) 88%, #ffffff 12%),
    color-mix(in srgb, var(--accent-dark) 74%, #ffffff 26%)
  );
  border: 1px solid color-mix(in srgb, var(--line) 78%, transparent);
  box-shadow: 0 2px 8px rgba(var(--accent-rgb), 0.28);
  transform: translateX(0);
  transition: transform 0.32s ease, box-shadow 0.32s ease;
}

:root.theme-dark .theme-toggle-dot {
  transform: translateX(var(--toggle-shift));
  box-shadow: 0 2px 10px rgba(var(--accent-rgb), 0.34);
}

.fluid-toggle {
  min-width: 2.45rem;
  height: 1.42rem;
  padding: 0 0.46rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--lang-switch-bg) 78%, transparent);
  color: var(--text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
  transition: transform 0.22s ease, border-color 0.22s ease, opacity 0.22s ease;
}

.fluid-toggle:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 44%, transparent);
}

.fluid-toggle:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--accent) 52%, transparent);
  outline-offset: 2px;
}

.fluid-toggle.is-disabled,
.fluid-toggle:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.fluid-toggle.is-disabled:hover,
.fluid-toggle:disabled:hover {
  border-color: var(--line);
}

.fluid-toggle.is-disabled::after,
.fluid-toggle:disabled::after {
  opacity: 0.2;
  transform: scale(0.82);
  box-shadow: none;
}

.fluid-toggle-label {
  font-family: "Sora", sans-serif;
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  line-height: 1;
}

.fluid-toggle::after {
  content: "";
  position: absolute;
  right: 0.32rem;
  width: 0.3rem;
  height: 0.3rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 80%, #ffffff 20%);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.14);
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.fluid-toggle.is-off {
  opacity: 0.82;
}

.fluid-toggle.is-off::after {
  opacity: 0.36;
  transform: scale(0.86);
}

.fluid-off .splash-canvas {
  opacity: 0 !important;
  filter: none;
}

.back-link {
  color: var(--link-color);
  background: var(--link-bg);
}

.store-link {
  color: var(--store-text);
  border-color: color-mix(in srgb, var(--accent) 78%, #ffffff 22%);
  background: linear-gradient(120deg, var(--store-grad-a) 0%, var(--store-grad-b) 100%);
}

.back-link:hover,
.store-link:hover {
  transform: translateY(-2px);
}

.app-hero {
  border: 1px solid var(--line);
  border-radius: 1.15rem;
  background: var(--hero-bg);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(1rem, 2.2vw, 1.7rem);
  padding: clamp(1rem, 2vw, 1.4rem);
  margin-bottom: 1rem;
}

.hero-icon {
  width: clamp(6.8rem, 16vw, 10rem);
  height: clamp(6.8rem, 16vw, 10rem);
  aspect-ratio: 1 / 1;
  border-radius: 1.45rem;
  border: 1px solid rgba(var(--accent-rgb), 0.26);
  padding: clamp(0.42rem, 0.9vw, 0.65rem);
  background: color-mix(in srgb, var(--accent) 14%, #ffffff 86%);
  object-fit: contain;
  object-position: center center;
  image-rendering: -webkit-optimize-contrast;
  box-shadow: 0 18px 35px rgba(var(--accent-rgb), 0.26);
  display: block;
}

.hero-copy {
  display: grid;
  gap: 0.68rem;
  align-content: start;
}

.kicker {
  margin: 0;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--kicker);
}

.hero-copy h1 {
  margin: 0;
  font-family: "Sora", sans-serif;
  font-size: clamp(2rem, 5.6vw, 4.2rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--title);
}

.hero-copy p {
  margin: 0;
  max-width: 66ch;
  color: var(--copy);
  font-size: clamp(1rem, 1.25vw, 1.12rem);
  line-height: 1.5;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.hero-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 1.85rem;
  padding: 0 0.72rem;
  border-radius: 999px;
  border: 1px solid rgba(var(--accent-rgb), 0.3);
  color: var(--tag-text);
  background: var(--tag-bg);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 700;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.95rem;
}

.info-card {
  border: 1px solid var(--line);
  border-radius: 0.92rem;
  padding: 1rem;
  background: var(--card-bg);
}

.info-card h2 {
  margin: 0 0 0.55rem;
  font-family: "Sora", sans-serif;
  color: var(--title);
  font-size: 1.12rem;
}

.info-card p {
  margin: 0;
  color: var(--copy);
  line-height: 1.54;
}

.info-card ul {
  margin: 0;
  padding-left: 1.02rem;
  display: grid;
  gap: 0.42rem;
}

.info-card li {
  color: var(--copy);
  line-height: 1.45;
}

@media (max-width: 820px) {
  .app-top {
    flex-wrap: wrap;
  }

  .top-actions {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 0.55rem;
  }

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

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

  .splash-canvas {
    opacity: calc(var(--canvas-opacity) * 0.72);
  }

  .fluid-toggle {
    min-width: 2.2rem;
  }
}