:root {
  color-scheme: dark;
  --page: #111419;
  --surface: #191d24;
  --surface-raised: #202630;
  --line: #2a303a;
  --line-strong: #3b4554;
  --text: #f2f4f7;
  --muted: #a3abb8;
  --quiet: #758091;
  --accent: #5b8cff;
  --accent-ink: #09152b;
  --accent-soft: rgb(91 140 255 / 10%);
  --header: rgb(17 20 25 / 94%);
  --content-width: 1120px;
  --font-sans: "Avenir Next", Avenir, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Consolas, monospace;
  --font-size-small: 13px;
  --font-size-body: 16px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --radius-small: 4px;
  --radius-medium: 6px;
  --radius-large: 8px;
  --shadow-soft: 0 20px 48px rgb(0 0 0 / 18%);
  --shadow-accent: 0 8px 24px rgb(91 140 255 / 16%);
  --transition-fast: 160ms ease;
  --transition-normal: 180ms ease;
  --transition-intro: 650ms;
  font-family: var(--font-sans);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

:root[data-theme="light"] {
  color-scheme: light;
  --page: #f5f6f8;
  --surface: #ffffff;
  --surface-raised: #edf0f5;
  --line: #dce1e8;
  --line-strong: #c4ccd8;
  --text: #202630;
  --muted: #566171;
  --quiet: #626e7e;
  --accent: #416fe0;
  --accent-ink: #ffffff;
  --accent-soft: rgb(65 111 224 / 8%);
  --header: rgb(245 246 248 / 94%);
  --shadow-soft: 0 20px 48px rgb(32 38 48 / 8%);
  --shadow-accent: 0 8px 24px rgb(65 111 224 / 14%);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
  background: var(--page);
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-size: var(--font-size-body);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

button,
a {
  color: inherit;
  font: inherit;
}

a {
  text-decoration: none;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.section-wrap {
  width: min(var(--content-width), calc(100% - var(--space-8)));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 12px;
  left: 12px;
  padding: 9px 14px;
  transform: translateY(-160%);
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--surface);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 5;
  top: 0;
  border-bottom: 1px solid var(--line);
  background: var(--header);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  width: min(var(--content-width), calc(100% - var(--space-8)));
  min-height: 76px;
  margin-inline: auto;
  align-items: center;
  justify-content: space-between;
}

.wordmark,
.footer-wordmark {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 15px;
  font-weight: 650;
  letter-spacing: 0;
}

.wordmark-mark {
  display: grid;
  width: 31px;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-medium);
  color: var(--text);
  font-size: 17px;
  font-weight: 600;
}

.wordmark-light {
  color: var(--muted);
  font-weight: 450;
}

.primary-navigation {
  display: flex;
  align-items: center;
  gap: 22px;
}

.primary-navigation > a {
  color: var(--muted);
  font-size: 14px;
  transition: color var(--transition-fast);
}

.primary-navigation > a:hover,
.back-to-top:hover {
  color: var(--text);
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: var(--radius-medium);
}

.language-option {
  min-width: 40px;
  min-height: 44px;
  padding: 4px 8px;
  border: 0;
  border-radius: var(--radius-small);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
  font-weight: 600;
}

.language-option[aria-pressed="true"] {
  background: var(--surface-raised);
  color: var(--text);
}

.theme-toggle {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 9px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-medium);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
  transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.theme-toggle:hover {
  border-color: var(--line-strong);
  background: var(--surface);
  color: var(--text);
}

.theme-toggle-dot {
  width: 10px;
  aspect-ratio: 1;
  border: 1px solid currentColor;
  border-radius: 50%;
  background: currentColor;
}

.menu-toggle {
  display: none;
}

.hero {
  position: relative;
  display: grid;
  min-height: 650px;
  padding-block: 96px 104px;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  align-items: center;
  gap: 64px;
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 650px;
  animation: rise-in var(--transition-intro) both;
}

.eyebrow {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: var(--font-size-small);
  font-weight: 600;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.eyebrow-rule {
  width: 28px;
  height: 1px;
  background: var(--accent);
}

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

.hero h1 {
  margin-bottom: 26px;
  font-size: 88px;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 0.96;
}

.hero-title-accent {
  color: var(--accent);
}

.hero-tagline {
  margin-bottom: 12px;
  font-size: 28px;
  font-weight: 500;
  line-height: 1.25;
}

.hero-description {
  max-width: 540px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-medium);
  font-size: 14px;
  font-weight: 600;
  transition: transform var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.button-primary:hover {
  background: var(--text);
  color: var(--page);
  box-shadow: var(--shadow-accent);
}

.button-secondary {
  border-color: var(--line-strong);
  background: transparent;
  color: var(--text);
}

.button-secondary:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.hero-art {
  position: relative;
  display: grid;
  width: 100%;
  max-width: 460px;
  aspect-ratio: 1 / 0.94;
  margin-left: auto;
  overflow: hidden;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-large);
  background-color: var(--surface);
  background-image:
    linear-gradient(90deg, transparent calc(50% - 0.5px), var(--line) 50%, transparent calc(50% + 0.5px)),
    linear-gradient(0deg, transparent calc(50% - 0.5px), var(--line) 50%, transparent calc(50% + 0.5px)),
    radial-gradient(ellipse at 50% 46%, var(--accent-soft), transparent 65%);
  box-shadow: var(--shadow-soft);
}

.hero-art-top,
.hero-art-bottom {
  position: absolute;
  right: 24px;
  left: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 10px;
}

.hero-art-top {
  top: 22px;
}

.hero-art-bottom {
  bottom: 22px;
  justify-content: flex-start;
  gap: 12px;
}

.hero-art-divider {
  width: 22px;
  height: 1px;
  background: var(--accent);
}

.hero-emblem {
  position: relative;
  display: grid;
  width: 47%;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--accent);
  border-radius: 22px;
  background: linear-gradient(145deg, var(--surface-raised), var(--page));
  box-shadow: var(--shadow-accent);
  color: var(--text);
}

.hero-emblem::before {
  position: absolute;
  z-index: -1;
  inset: -12px;
  border: 1px solid var(--line-strong);
  border-radius: 28px;
  content: "";
  transform: rotate(9deg);
}

.hero-emblem span {
  color: var(--accent);
  font-size: 144px;
  font-weight: 500;
  line-height: 1;
}

.section-block {
  padding-block: 104px;
}

.section-heading {
  display: flex;
  margin-bottom: 42px;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
}

.section-heading .eyebrow,
.about-inner > .eyebrow,
.contact .eyebrow {
  margin-bottom: var(--space-3);
}

.section-heading h2 {
  margin-bottom: 0;
  font-size: 44px;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.2;
}

.section-intro {
  max-width: 390px;
  margin-bottom: 2px;
  color: var(--muted);
  font-size: 15px;
}

.updates-empty {
  display: flex;
  min-height: 112px;
  padding-block: 22px;
  align-items: flex-start;
  gap: 18px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line);
}

.updates-empty-mark {
  display: grid;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
  color: var(--accent);
}

.updates-empty h3 {
  margin: 1px 0 5px;
  font-size: 17px;
  font-weight: 550;
}

.updates-empty p {
  max-width: 600px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.updates-list {
  border-top: 1px solid var(--line-strong);
}

.announcement-item {
  display: grid;
  padding-block: 22px;
  grid-template-columns: minmax(130px, 0.45fr) minmax(170px, 0.75fr) minmax(0, 1.4fr) auto;
  align-items: baseline;
  gap: 14px 24px;
  border-bottom: 1px solid var(--line);
}

.announcement-item time {
  color: var(--quiet);
  font-family: var(--font-mono);
  font-size: 12px;
}

.announcement-item h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 550;
}

.announcement-item p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.announcement-link {
  color: var(--text);
  font-size: 13px;
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 4px;
}

.announcement-link:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 18px;
}

.product-card {
  position: relative;
  display: flex;
  min-height: 360px;
  padding: 26px;
  flex-direction: column;
  align-items: flex-start;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-large);
  background: var(--surface);
  transition: border-color var(--transition-normal), background-color var(--transition-normal), transform var(--transition-normal);
}

.product-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  background-color: var(--surface-raised);
}

.project-browser {
  display: grid;
  min-height: 340px;
  padding: 34px;
  grid-column: 1 / -1;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  align-items: center;
  gap: 48px;
  background: linear-gradient(110deg, var(--surface), var(--page));
}

.project-copy {
  max-width: 520px;
}

.project-browser h3 {
  font-size: 36px;
}

.project-echo,
.project-privacy {
  grid-column: span 6;
}

.product-card-top {
  display: flex;
  width: 100%;
  margin-bottom: 24px;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.product-index,
.product-type {
  color: var(--quiet);
  font-family: var(--font-mono);
  font-size: 11px;
}

.product-card h3 {
  margin-bottom: 10px;
  font-size: 28px;
  font-weight: 550;
  letter-spacing: 0;
}

.product-card p {
  max-width: 470px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.product-card-footer {
  display: flex;
  width: 100%;
  margin-top: auto;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.product-card-footer .product-type {
  margin: 0;
}

.project-link,
.detail-back-link {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 13px;
  font-weight: 550;
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 5px;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

.project-link:hover,
.detail-back-link:hover {
  color: var(--accent);
  text-decoration-color: var(--accent);
}

.project-link span:last-child {
  color: var(--accent);
  text-decoration: none;
}

.product-type {
  margin-top: auto;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: var(--radius-small);
}

.status {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  gap: 8px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 11px;
}

.status-dot {
  width: 6px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--accent);
}

.status-planned .status-dot {
  background: var(--quiet);
}

.status-quiet {
  color: var(--quiet);
}

.project-art {
  position: relative;
  display: grid;
  width: 100%;
  min-height: 190px;
  overflow: hidden;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-medium);
  background-color: var(--page);
}

.project-browser .project-art {
  min-height: 270px;
}

.browser-art {
  background-image:
    radial-gradient(ellipse at 68% 25%, var(--accent-soft), transparent 58%),
    linear-gradient(0deg, transparent 49.8%, var(--line) 50%, transparent 50.2%);
}

.browser-frame {
  width: 78%;
  aspect-ratio: 1.5;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-medium);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  transform: rotate(2deg);
}

.browser-chrome {
  display: flex;
  height: 18%;
  padding: 0 10px;
  align-items: center;
  gap: 5px;
  border-bottom: 1px solid var(--line);
}

.browser-chrome > span {
  width: 5px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--line-strong);
}

.browser-chrome > span:first-child {
  background: var(--accent);
}

.browser-chrome i {
  height: 5px;
  margin-left: auto;
  flex: 0 1 45%;
  border-radius: 999px;
  background: var(--surface-raised);
}

.browser-canvas {
  display: grid;
  height: 82%;
  padding: 12px;
  grid-template-columns: 1.2fr 0.8fr;
  grid-template-rows: 1fr 1fr;
  gap: 8px;
}

.browser-canvas > span {
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--surface-raised);
}

.browser-canvas > span:first-child {
  grid-row: span 2;
  background: linear-gradient(145deg, var(--accent-soft), var(--surface-raised));
}

.art-caption {
  position: absolute;
  right: 14px;
  bottom: 12px;
  color: var(--quiet);
  font-family: var(--font-mono);
  font-size: 9px;
}

.echo-art {
  min-height: 160px;
  margin-bottom: 24px;
  background-image:
    radial-gradient(ellipse at 50% 75%, rgb(91 140 255 / 13%), transparent 48%),
    linear-gradient(180deg, var(--page), var(--surface));
}

.echo-orbit {
  width: 76px;
  aspect-ratio: 1;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, var(--accent), transparent 70%);
  opacity: 0.72;
}

.echo-horizon {
  position: absolute;
  right: 0;
  bottom: 28px;
  left: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.6;
}

.privacy-art {
  min-height: 160px;
  margin-bottom: 24px;
  background-image: radial-gradient(ellipse at 50% 50%, var(--accent-soft), transparent 62%);
}

.privacy-panel {
  position: absolute;
  width: 104px;
  height: 104px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-medium);
  transform: rotate(45deg);
}

.privacy-panel-one {
  background: var(--surface);
}

.privacy-panel-two {
  width: 68px;
  height: 68px;
  border-color: var(--accent);
  background: var(--accent-soft);
}

.project-detail {
  display: grid;
  min-height: 430px;
  padding-block: 84px;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
  align-items: center;
  gap: 64px;
  border-top: 1px solid var(--line);
}

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

.project-detail-visual {
  min-height: 320px;
  aspect-ratio: 1.24;
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-soft);
}

.project-detail-visual .browser-frame {
  width: 80%;
}

.project-detail-visual.echo-art,
.project-detail-visual.privacy-art {
  min-height: 320px;
  margin: 0;
}

.project-detail-echo .project-detail-copy {
  grid-column: 1;
  grid-row: 1;
}

.project-detail-echo .project-detail-visual {
  grid-column: 2;
  grid-row: 1;
}

.project-detail-copy .eyebrow {
  margin-bottom: 18px;
}

.project-detail-copy h2 {
  margin-bottom: 16px;
  font-size: 48px;
  font-weight: 550;
  line-height: 1.1;
}

.browser-page-hero {
  display: grid;
  min-height: 560px;
  padding-block: 80px;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: 64px;
  border-bottom: 1px solid var(--line);
}

.browser-page-copy {
  max-width: 590px;
}

.browser-page-copy .eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
}

.browser-page-copy .eyebrow a {
  color: var(--muted);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 4px;
}

.browser-page-copy .eyebrow a:hover {
  color: var(--text);
}

.browser-page-copy h1 {
  margin-bottom: 18px;
  font-size: 64px;
  font-weight: 550;
  line-height: 1.05;
}

.browser-page-lead {
  max-width: 520px;
  margin-bottom: 20px;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.65;
}

.browser-page-status {
  width: fit-content;
  margin-bottom: 24px;
}

.browser-page-art {
  width: 100%;
  min-height: 380px;
  aspect-ratio: 1.2;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-soft);
}

.browser-page-art .browser-frame {
  width: 78%;
}

.download-center {
  padding-block: 64px 24px;
  scroll-margin-top: 92px;
}

.download-panel {
  display: grid;
  padding: 36px;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  align-items: center;
  gap: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius-large);
  background: linear-gradient(120deg, var(--surface), var(--page));
  box-shadow: var(--shadow-soft);
}

.download-main .eyebrow {
  margin-bottom: 14px;
}

.download-state {
  width: fit-content;
  margin-bottom: 16px;
}

.download-main h2 {
  max-width: 560px;
  margin-bottom: 12px;
  font-size: 36px;
  font-weight: 550;
  line-height: 1.15;
}

.download-message {
  max-width: 560px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.release-facts {
  display: grid;
  margin: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 20px;
}

.release-facts > div {
  min-width: 0;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.release-facts dt {
  margin-bottom: 5px;
  color: var(--quiet);
  font-size: 12px;
}

.release-facts dd {
  margin: 0;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
}

.browser-info {
  padding-top: 64px;
}

.browser-info-heading {
  max-width: 660px;
  margin-bottom: 34px;
}

.browser-info-heading h2 {
  margin: 0;
  font-size: 38px;
  font-weight: 500;
  line-height: 1.2;
}

.browser-info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.browser-info-item {
  padding-top: 18px;
  border-top: 1px solid var(--line-strong);
}

.info-index {
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
}

.browser-info-item h3 {
  margin: 16px 0 8px;
  font-size: 19px;
  font-weight: 550;
}

.browser-info-item p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.browser-back-link {
  margin-top: 36px;
}

.project-page-button {
  margin-top: 20px;
}

.project-detail-description {
  margin: 24px 0 12px;
  color: var(--text);
  font-size: 19px;
  line-height: 1.65;
}

.project-detail-note {
  margin: 0 0 24px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.detail-back-link {
  color: var(--muted);
}

.product-card-future {
  display: grid;
  min-height: 0;
  padding: 20px 0 0;
  grid-column: 1 / -1;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 4px 20px;
  border: 0;
  border-top: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
}

.product-card-future:hover {
  transform: none;
  border-color: var(--line);
  background: transparent;
}

.product-card-future .product-card-top {
  margin: 0;
  grid-column: 1;
  grid-row: 1 / span 3;
}

.product-card-future h3,
.product-card-future p,
.product-card-future .product-type {
  margin: 0;
  grid-column: 2;
}

.product-card-future h3 {
  font-size: 18px;
}

.product-card-future p {
  font-size: 13px;
}

.product-card-future .product-type {
  width: fit-content;
}

.about {
  border-block: 1px solid var(--line);
  background: linear-gradient(110deg, var(--surface), var(--page));
}

.about-inner {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 64px;
}

.about-copy {
  max-width: 620px;
}

.about-copy h2 {
  margin-bottom: 18px;
  font-size: 42px;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.25;
}

.about-copy p,
.contact-copy > p:last-child {
  max-width: 540px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 16px;
}

.about-copy .about-name-note {
  margin-top: 12px;
  color: var(--quiet);
  font-size: 13px;
}

.contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  border-bottom: 1px solid var(--line);
}

.contact-copy {
  max-width: 620px;
}

.contact h2 {
  margin-bottom: 14px;
  font-size: 38px;
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.2;
}

.contact-copy > p:last-child {
  max-width: 550px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
}

.contact-links {
  min-width: 240px;
  padding: 20px 0 20px 24px;
  border-left: 1px solid var(--line);
}

.contact-placeholder {
  max-width: 260px;
  margin: 0;
  color: var(--quiet);
  font-size: 13px;
}

.contact-link {
  display: block;
  width: fit-content;
  margin-top: 8px;
  color: var(--text);
  font-size: 14px;
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 4px;
}

.contact-link:hover {
  text-decoration-color: var(--accent);
}

.support {
  display: flex;
  padding-block: 40px 48px;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  border-top: 1px solid var(--line);
}

.support-copy {
  max-width: 680px;
}

.support-copy .eyebrow {
  margin-bottom: 10px;
}

.support-copy h2 {
  margin-bottom: 8px;
  font-size: 22px;
  font-weight: 550;
  line-height: 1.25;
}

.support-copy > p:last-child {
  max-width: 660px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.support-action {
  min-width: 220px;
}

.support-unavailable {
  max-width: 260px;
  margin: 0;
  color: var(--quiet);
  font-size: 13px;
  line-height: 1.6;
}

.site-footer {
  border-top: 0;
}

.footer-inner {
  display: flex;
  min-height: 88px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-wordmark {
  font-size: 13px;
}

.copyright,
.back-to-top {
  margin: 0;
  color: var(--quiet);
  font-size: 12px;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color var(--transition-fast);
}

.back-to-top:hover {
  color: var(--text);
}

.product-card:focus-visible,
.project-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .primary-navigation {
    gap: 16px;
  }

  .primary-navigation > a {
    font-size: 13px;
  }

  .theme-toggle {
    padding-inline: 9px;
  }

  .hero {
    gap: 40px;
  }

  .hero h1 {
    font-size: 76px;
  }

  .project-browser {
    gap: 32px;
  }

  .browser-page-hero {
    gap: 40px;
  }

  .browser-page-copy h1 {
    font-size: 56px;
  }

  .download-panel {
    padding: 28px;
    gap: 32px;
  }
}

@media (max-width: 840px) {
  .header-inner {
    position: relative;
    min-height: 72px;
  }

  .menu-toggle {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    gap: 10px;
    padding: 0 12px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-medium);
    background: transparent;
    color: var(--text);
    cursor: pointer;
    font-size: 13px;
  }

  .menu-toggle-icon,
  .menu-toggle-icon::before,
  .menu-toggle-icon::after {
    display: block;
    width: 14px;
    height: 1px;
    background: currentColor;
  }

  .menu-toggle-icon {
    position: relative;
  }

  .menu-toggle-icon::before,
  .menu-toggle-icon::after {
    position: absolute;
    left: 0;
    content: "";
  }

  .menu-toggle-icon::before {
    top: -4px;
  }

  .menu-toggle-icon::after {
    top: 4px;
  }

  .primary-navigation {
    position: absolute;
    top: calc(100% - 1px);
    right: 0;
    left: 0;
    display: none;
    padding: 12px 20px 20px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border: 1px solid var(--line);
    border-top: 0;
    background: var(--page);
    box-shadow: var(--shadow-soft);
  }

  .primary-navigation.is-open {
    display: flex;
  }

  .primary-navigation > a {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
  }

  .language-switch,
  .theme-toggle {
    width: fit-content;
    margin-top: 14px;
  }

  .hero {
    min-height: auto;
    padding-block: 82px;
    grid-template-columns: minmax(0, 1fr) minmax(260px, 0.82fr);
    gap: 28px;
  }

  .hero h1 {
    font-size: 62px;
  }

  .hero-tagline {
    font-size: 24px;
  }

  .hero-description {
    font-size: 16px;
  }

  .hero-emblem span {
    font-size: 112px;
  }

  .project-browser {
    padding: 26px;
    grid-template-columns: minmax(0, 1fr) minmax(240px, 0.9fr);
    gap: 24px;
  }

  .project-browser .project-art {
    min-height: 220px;
  }

  .browser-page-hero {
    min-height: 0;
    padding-block: 64px;
    grid-template-columns: minmax(0, 1fr) minmax(240px, 0.85fr);
    gap: 28px;
  }

  .browser-page-copy h1 {
    font-size: 48px;
  }

  .browser-page-lead {
    font-size: 17px;
  }

  .browser-page-art {
    min-height: 280px;
  }

  .download-panel {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .browser-info-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

  .project-detail {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 0.95fr);
    gap: 32px;
  }

  .project-detail-visual,
  .project-detail-visual.echo-art,
  .project-detail-visual.privacy-art {
    min-height: 260px;
  }

  .project-detail-copy h2 {
    font-size: 40px;
  }

  .project-detail-description {
    font-size: 17px;
  }

  .project-echo,
  .project-privacy {
    grid-column: span 6;
  }

  .about-inner {
    grid-template-columns: 0.6fr 1.4fr;
    gap: 36px;
  }
}

@media (max-width: 640px) {
  .section-wrap,
  .header-inner {
    width: calc(100% - 40px);
  }

  .hero {
    padding-block: 64px 72px;
    grid-template-columns: minmax(0, 1fr);
    gap: 38px;
  }

  .browser-page-hero {
    padding-block: 52px 40px;
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
  }

  .browser-page-copy h1 {
    font-size: 44px;
  }

  .browser-page-lead {
    font-size: 16px;
  }

  .browser-page-art {
    min-height: 240px;
    aspect-ratio: 1.35;
  }

  .download-center {
    padding-top: 40px;
  }

  .download-panel {
    padding: 22px;
    gap: 22px;
  }

  .download-main h2 {
    font-size: 30px;
  }

  .release-facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .browser-info {
    padding-top: 42px;
  }

  .browser-info-heading h2 {
    font-size: 32px;
  }

  .hero-copy {
    max-width: 560px;
  }

  .hero h1 {
    margin-bottom: 20px;
    font-size: 56px;
  }

  .hero-tagline {
    font-size: 23px;
  }

  .hero-art {
    width: min(100%, 420px);
    margin-inline: auto;
    aspect-ratio: 1.25;
  }

  .hero-emblem {
    width: 38%;
    border-radius: 16px;
  }

  .hero-emblem::before {
    border-radius: 20px;
  }

  .hero-emblem span {
    font-size: 96px;
  }

  .section-block {
    padding-block: 76px;
  }

  .section-heading {
    margin-bottom: 30px;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .section-heading h2 {
    font-size: 36px;
  }

  .announcement-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .updates-empty {
    gap: 14px;
  }

  .product-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .project-browser,
  .project-echo,
  .project-privacy {
    grid-column: 1 / -1;
  }

  .project-browser {
    padding: 22px;
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .project-browser .project-art {
    min-height: 210px;
  }

  .project-detail {
    min-height: 0;
    padding-block: 56px;
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .project-detail-visual,
  .project-detail-visual.echo-art,
  .project-detail-visual.privacy-art {
    min-height: 230px;
    aspect-ratio: 1.3;
    grid-column: 1;
    grid-row: auto;
  }

  .project-detail-copy,
  .project-detail-echo .project-detail-copy,
  .project-detail-echo .project-detail-visual {
    grid-column: 1;
    grid-row: auto;
  }

  .project-detail-copy h2 {
    font-size: 36px;
  }

  .project-detail-description {
    margin-top: 18px;
    font-size: 17px;
  }

  .product-card-footer {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .product-card {
    min-height: 0;
    padding: 22px;
  }

  .project-browser h3,
  .product-card h3 {
    font-size: 26px;
  }

  .echo-art,
  .privacy-art {
    min-height: 150px;
  }

  .product-card-future {
    padding: 18px 0 0;
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .product-card-future .product-card-top,
  .product-card-future h3,
  .product-card-future p,
  .product-card-future .product-type {
    grid-column: 1;
    grid-row: auto;
  }

  .product-card-future .product-card-top {
    margin-bottom: 4px;
  }

  .about-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .about-copy h2 {
    font-size: 34px;
  }

  .contact {
    align-items: flex-start;
    flex-direction: column;
    gap: 22px;
  }

  .contact h2 {
    font-size: 34px;
  }

  .contact-links {
    min-width: 0;
    padding: 14px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .support {
    align-items: flex-start;
    flex-direction: column;
    gap: 18px;
  }

  .support-action {
    min-width: 0;
  }
}

@media (max-width: 420px) {
  .section-wrap,
  .header-inner {
    width: calc(100% - 32px);
  }

  .wordmark {
    gap: 8px;
    font-size: 14px;
  }

  .hero {
    padding-block: 54px 60px;
  }

  .hero h1 {
    font-size: 48px;
  }

  .hero-tagline {
    font-size: 21px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .button {
    justify-content: space-between;
  }

  .hero-art-top,
  .hero-art-bottom {
    right: 14px;
    left: 14px;
    font-size: 9px;
  }

  .hero-emblem span {
    font-size: 80px;
  }

  .section-block {
    padding-block: 64px;
  }

  .about-copy h2,
  .contact h2 {
    font-size: 30px;
  }

  .footer-inner {
    min-height: 104px;
    flex-wrap: wrap;
    gap: 8px 16px;
    padding-block: 16px;
  }

  .copyright {
    width: 100%;
    order: 1;
  }
}

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