/* ---------------------------------------------------------------------------
   erenium.tech — Material Design 3 baseline
   Tokens follow the M3 baseline scheme (seed #6750A4).
--------------------------------------------------------------------------- */

:root {
  /* color — light */
  --md-primary: #6750a4;
  --md-on-primary: #ffffff;
  --md-primary-container: #eaddff;
  --md-on-primary-container: #21005d;
  --md-secondary: #625b71;
  --md-on-secondary: #ffffff;
  --md-secondary-container: #e8def8;
  --md-on-secondary-container: #1d192b;
  --md-tertiary: #7d5260;
  --md-on-tertiary: #ffffff;
  --md-tertiary-container: #ffd8e4;
  --md-on-tertiary-container: #31111d;
  --md-surface: #fef7ff;
  --md-on-surface: #1d1b20;
  --md-surface-variant: #e7e0ec;
  --md-on-surface-variant: #49454f;
  --md-outline: #79747e;
  --md-outline-variant: #cac4d0;
  --md-surface-container-lowest: #ffffff;
  --md-surface-container-low: #f7f2fa;
  --md-surface-container: #f3edf7;
  --md-surface-container-high: #ece6f0;
  --md-surface-container-highest: #e6e0e9;
  --md-inverse-surface: #322f35;
  --md-inverse-on-surface: #f5eff7;
  --md-scrim: 0 0 0;

  /* shape */
  --md-shape-xs: 4px;
  --md-shape-s: 8px;
  --md-shape-m: 12px;
  --md-shape-l: 16px;
  --md-shape-xl: 28px;
  --md-shape-full: 999px;

  /* elevation */
  --md-elev-1: 0 1px 2px rgb(0 0 0 / 0.30), 0 1px 3px 1px rgb(0 0 0 / 0.15);
  --md-elev-2: 0 1px 2px rgb(0 0 0 / 0.30), 0 2px 6px 2px rgb(0 0 0 / 0.15);
  --md-elev-3: 0 4px 8px 3px rgb(0 0 0 / 0.15), 0 1px 3px rgb(0 0 0 / 0.30);

  /* motion */
  --md-easing-emphasized: cubic-bezier(0.2, 0, 0, 1);
  --md-easing-standard: cubic-bezier(0.2, 0, 0, 1);
  --md-duration-short: 200ms;
  --md-duration-medium: 400ms;
  --md-duration-long: 600ms;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --md-primary: #d0bcff;
    --md-on-primary: #381e72;
    --md-primary-container: #4f378b;
    --md-on-primary-container: #eaddff;
    --md-secondary: #ccc2dc;
    --md-on-secondary: #332d41;
    --md-secondary-container: #4a4458;
    --md-on-secondary-container: #e8def8;
    --md-tertiary: #efb8c8;
    --md-on-tertiary: #492532;
    --md-tertiary-container: #633b48;
    --md-on-tertiary-container: #ffd8e4;
    --md-surface: #141218;
    --md-on-surface: #e6e0e9;
    --md-surface-variant: #49454f;
    --md-on-surface-variant: #cac4d0;
    --md-outline: #938f99;
    --md-outline-variant: #49454f;
    --md-surface-container-lowest: #0f0d13;
    --md-surface-container-low: #1d1b20;
    --md-surface-container: #211f26;
    --md-surface-container-high: #2b2930;
    --md-surface-container-highest: #36343b;
    --md-inverse-surface: #e6e0e9;
    --md-inverse-on-surface: #322f35;
  }
}

:root[data-theme="dark"] {
  --md-primary: #d0bcff;
  --md-on-primary: #381e72;
  --md-primary-container: #4f378b;
  --md-on-primary-container: #eaddff;
  --md-secondary: #ccc2dc;
  --md-on-secondary: #332d41;
  --md-secondary-container: #4a4458;
  --md-on-secondary-container: #e8def8;
  --md-tertiary: #efb8c8;
  --md-on-tertiary: #492532;
  --md-tertiary-container: #633b48;
  --md-on-tertiary-container: #ffd8e4;
  --md-surface: #141218;
  --md-on-surface: #e6e0e9;
  --md-surface-variant: #49454f;
  --md-on-surface-variant: #cac4d0;
  --md-outline: #938f99;
  --md-outline-variant: #49454f;
  --md-surface-container-lowest: #0f0d13;
  --md-surface-container-low: #1d1b20;
  --md-surface-container: #211f26;
  --md-surface-container-high: #2b2930;
  --md-surface-container-highest: #36343b;
  --md-inverse-surface: #e6e0e9;
  --md-inverse-on-surface: #322f35;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--md-surface);
  color: var(--md-on-surface);
  font-family: Roboto, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background var(--md-duration-medium) var(--md-easing-standard),
    color var(--md-duration-medium) var(--md-easing-standard);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--md-primary);
}

:focus-visible {
  outline: 3px solid var(--md-primary);
  outline-offset: 2px;
}

.material-symbols-outlined {
  font-variation-settings: "FILL" 0, "wght" 400, "GRAD" 0, "opsz" 24;
  user-select: none;
}

/* --- layout ------------------------------------------------------------- */

.wrap {
  width: min(100% - 2.5rem, 68rem);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  border-radius: 0 0 var(--md-shape-m) 0;
  background: var(--md-primary);
  color: var(--md-on-primary);
  text-decoration: none;
}

.skip-link:focus {
  left: 0;
}

/* --- buttons ------------------------------------------------------------ */

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 40px;
  padding-inline: 1.5rem;
  border: none;
  border-radius: var(--md-shape-full);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.0071em;
  text-decoration: none;
  cursor: pointer;
  overflow: hidden;
  transition: box-shadow var(--md-duration-short) var(--md-easing-standard),
    background-color var(--md-duration-short) var(--md-easing-standard);
}

.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  transition: opacity var(--md-duration-short) var(--md-easing-standard);
}

.btn:hover::after {
  opacity: 0.08;
}

.btn:active::after {
  opacity: 0.12;
}

.btn--filled {
  background: var(--md-primary);
  color: var(--md-on-primary);
}

.btn--filled:hover {
  box-shadow: var(--md-elev-1);
}

.btn--tonal {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}

.btn--outlined {
  background: transparent;
  color: var(--md-primary);
  box-shadow: inset 0 0 0 1px var(--md-outline-variant);
}

.btn--text {
  background: transparent;
  color: var(--md-primary);
  padding-inline: 0.75rem;
}

.btn__icon {
  width: 18px;
  height: 18px;
  flex: none;
}

.icon-btn {
  position: relative;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  flex: none;
  padding: 0;
  border: none;
  border-radius: var(--md-shape-full);
  background: transparent;
  color: var(--md-on-surface-variant);
  cursor: pointer;
  overflow: hidden;
}

.icon-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  transition: opacity var(--md-duration-short) var(--md-easing-standard);
}

.icon-btn:hover::after {
  opacity: 0.08;
}

.icon-btn:active::after {
  opacity: 0.12;
}

/* --- hero --------------------------------------------------------------- */

.hero {
  position: relative;
  display: grid;
  align-content: center;
  min-height: min(78vh, 44rem);
  padding-block: 5.5rem 3rem;
  overflow: hidden;
}

/* Full-bleed: the glow spans the whole hero, and `closest-side` makes every
   layer reach zero opacity exactly at the edges — so nothing is ever clipped
   into a visible rectangle. */
.hero__glow {
  position: absolute;
  z-index: -1;
  inset: 0;
  background:
    radial-gradient(
      ellipse closest-side at 50% 52%,
      color-mix(in srgb, var(--md-primary) 70%, transparent) 0%,
      color-mix(in srgb, var(--md-primary) 34%, transparent) 44%,
      transparent 100%
    ),
    radial-gradient(
      ellipse closest-side at 66% 22%,
      color-mix(in srgb, var(--md-tertiary) 44%, transparent) 0%,
      transparent 100%
    );
  pointer-events: none;
}

/* Small pixel wordmark tucked into the top-right corner. */
.wordmark {
  position: absolute;
  top: 1.75rem;
  right: max(1.25rem, calc((100vw - 68rem) / 2));
  z-index: 1;
  font-family: "Press Start 2P", ui-monospace, monospace;
  font-size: 0.625rem;
  letter-spacing: 0.04em;
  color: var(--md-on-surface-variant);
  opacity: 0.45;
  pointer-events: none;
  user-select: none;
}

.hello {
  position: relative;
  margin: 0;
  font-size: clamp(3.25rem, 13vw, 8.5rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--md-on-surface);
}

/* --- language swap -----------------------------------------------------
   Every .swap element cycles through its own translations in lockstep, so
   the greeting and the section heading always show the same language.
   No-JS / reduced-motion fallback: all variants stay on the page. */

.swap__word {
  display: inline-block;
  margin-right: 0.35em;
}

.swap.is-cycling {
  display: grid;
  min-height: 1.05em;
}

.swap.is-cycling .swap__word {
  grid-area: 1 / 1;
  margin-right: 0;
  opacity: 0;
  translate: 0 0.28em;
  filter: blur(6px);
  transition: opacity var(--md-duration-long) var(--md-easing-emphasized),
    translate var(--md-duration-long) var(--md-easing-emphasized),
    filter var(--md-duration-long) var(--md-easing-emphasized);
  pointer-events: none;
}

.swap.is-cycling .swap__word.is-active {
  opacity: 1;
  translate: 0 0;
  filter: blur(0);
}

/* The heading is a grid item too — keep it from stretching to the column. */
.section__title.swap {
  justify-items: start;
}

/* --- sections ----------------------------------------------------------- */

.section {
  padding-block: 3.5rem;
}

.section__title {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: 0;
}

.section__lead {
  max-width: 40rem;
  margin: 0 0 2rem;
  color: var(--md-on-surface-variant);
}

.divider {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--md-outline-variant);
}

/* --- social ------------------------------------------------------------- */

.social {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* --- footer ------------------------------------------------------------- */

.footer {
  padding-block: 2.5rem 3rem;
  color: var(--md-on-surface-variant);
  font-size: 0.875rem;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  align-items: center;
  justify-content: space-between;
}

/* --- product page ------------------------------------------------------- */

.product-hero {
  display: grid;
  gap: 2rem;
  align-items: center;
  padding-block: 4.5rem 2.5rem;
  grid-template-columns: 1fr;
}

@media (min-width: 52rem) {
  .product-hero {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  }
}

.product-hero__icon {
  width: min(11rem, 42vw);
  height: auto;
  border-radius: 22%;
  box-shadow: var(--md-elev-3);
}

.product-hero__title {
  margin: 0;
  font-size: clamp(2.5rem, 7vw, 3.75rem);
  font-weight: 500;
  letter-spacing: -0.02em;
}

.product-hero__tagline {
  margin: 0.75rem 0 0;
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--md-on-surface-variant);
}

.product-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  color: var(--md-on-surface-variant);
  font-size: 0.8125rem;
}

.badges li {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--md-shape-full);
  background: var(--md-surface-container-high);
}

.badges .material-symbols-outlined {
  font-size: 16px;
}

.demo {
  margin: 0;
  padding: 1rem;
  border-radius: var(--md-shape-xl);
  background: var(--md-surface-container);
}

.demo img {
  display: block;
  width: 100%;
  border-radius: var(--md-shape-l);
}

.demo figcaption {
  margin-top: 0.75rem;
  text-align: center;
  color: var(--md-on-surface-variant);
  font-size: 0.8125rem;
}

.features {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  padding: 0;
  margin: 0;
  list-style: none;
}

.feature {
  display: flex;
  gap: 0.875rem;
  padding: 1.125rem;
  border-radius: var(--md-shape-l);
  background: var(--md-surface-container-low);
}

.feature .material-symbols-outlined {
  color: var(--md-primary);
  font-size: 24px;
  flex: none;
}

.feature h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  font-weight: 500;
}

.feature p {
  margin: 0;
  color: var(--md-on-surface-variant);
  font-size: 0.9375rem;
}

.install {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
}

.install__panel {
  padding: 1.25rem;
  border-radius: var(--md-shape-l);
  background: var(--md-surface-container-low);
}

.install__panel h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 500;
}

.install__panel p {
  margin: 0 0 1rem;
  color: var(--md-on-surface-variant);
  font-size: 0.9375rem;
}

.code {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.625rem 0.625rem 0.875rem;
  border-radius: var(--md-shape-m);
  background: var(--md-surface-container-highest);
  overflow-x: auto;
}

.code code {
  flex: 1;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.8125rem;
  white-space: pre;
}

/* The install command doubles as the product hero's primary call to action. */
.install-cmd {
  max-width: 31rem;
  margin-top: 1.75rem;
  padding-left: 1.125rem;
  border-radius: var(--md-shape-full);
  box-shadow: inset 0 0 0 1px var(--md-outline-variant);
}

.prose p {
  max-width: 42rem;
  color: var(--md-on-surface-variant);
}

.prose code {
  padding: 0.1em 0.35em;
  border-radius: var(--md-shape-xs);
  background: var(--md-surface-container-high);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.875em;
}

.snackbar {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  z-index: 20;
  translate: -50% 1rem;
  padding: 0.875rem 1.25rem;
  border-radius: var(--md-shape-xs);
  background: var(--md-inverse-surface);
  color: var(--md-inverse-on-surface);
  box-shadow: var(--md-elev-3);
  font-size: 0.875rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--md-duration-short) var(--md-easing-standard),
    translate var(--md-duration-short) var(--md-easing-emphasized);
}

.snackbar.is-visible {
  opacity: 1;
  translate: -50% 0;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  /* The greeting keeps rotating here — motion sensitivity is about movement,
     so it crossfades in place rather than sliding and blurring. */
  .swap.is-cycling .swap__word {
    translate: none;
    filter: none;
    transition-property: opacity !important;
    transition-duration: var(--md-duration-medium) !important;
  }
}