:root {
  color-scheme: light;
  --ink: #111936;
  --ink-soft: #556078;
  --night: #081136;
  --night-soft: #121f58;
  --paper: #fffaf0;
  --paper-soft: #f6eddd;
  --surface: #ffffff;
  --gold: #ffc761;
  --orange: #ff8444;
  --pink: #f35aa2;
  --blue: #5069ee;
  --line: rgb(17 25 54 / 13%);
  --line-light: rgb(255 255 255 / 18%);
  --shadow: 0 26px 70px rgb(9 18 54 / 15%);
  --shell: min(1160px, calc(100% - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 86px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

body:has(dialog[open]) {
  overflow: hidden;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

button,
select,
a {
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 4px;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  border-radius: 999px;
  background: var(--surface);
  color: var(--ink);
  font-weight: 800;
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

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

.site-header {
  position: fixed;
  z-index: 30;
  top: 0;
  left: 0;
  width: 100%;
  border-bottom: 1px solid var(--line-light);
  background: rgb(8 17 54 / 88%);
  box-shadow: 0 10px 36px rgb(0 0 0 / 10%);
  color: #fff;
  backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  min-height: 76px;
  align-items: center;
  gap: 30px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 11px;
  color: inherit;
  font-size: 0.98rem;
  font-weight: 850;
  letter-spacing: 0.05em;
  text-decoration: none;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border: 1px solid rgb(255 255 255 / 42%);
  border-radius: 13px;
  box-shadow: 0 7px 20px rgb(0 0 0 / 20%);
  object-fit: cover;
}

.primary-navigation {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 2.6vw, 36px);
}

.primary-navigation a {
  position: relative;
  padding-block: 8px;
  color: rgb(255 255 255 / 82%);
  font-size: 0.9rem;
  font-weight: 760;
  text-decoration: none;
}

.primary-navigation a::after {
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 2px;
  border-radius: 99px;
  background: var(--gold);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.primary-navigation a:hover::after,
.primary-navigation a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-actions {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
}

.language-picker {
  position: relative;
}

.language-picker::after {
  position: absolute;
  top: 50%;
  right: 12px;
  color: rgb(255 255 255 / 72%);
  content: "▾";
  font-size: 0.72rem;
  pointer-events: none;
  transform: translateY(-52%);
}

.language-picker select {
  min-width: 94px;
  height: 42px;
  padding: 0 30px 0 14px;
  border: 1px solid rgb(255 255 255 / 28%);
  border-radius: 999px;
  appearance: none;
  background: rgb(255 255 255 / 9%);
  color: #fff;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 850;
}

.language-picker option {
  background: var(--night);
  color: #fff;
}

.menu-toggle {
  display: none;
}

.hero-section {
  position: relative;
  isolation: isolate;
  display: grid;
  min-height: min(720px, 82svh);
  padding-top: 76px;
  place-items: center;
  overflow: hidden;
  background: var(--night);
  color: #fff;
}

.hero-backdrop {
  position: absolute;
  z-index: -2;
  inset: 0;
  background-image: url("../images/quasar-hero.webp");
  background-position: center;
  background-size: cover;
}

.hero-section::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  background:
    linear-gradient(90deg, rgb(5 11 38 / 92%) 0%, rgb(7 15 49 / 69%) 48%, rgb(7 15 49 / 15%) 78%),
    linear-gradient(0deg, rgb(8 17 54 / 56%), transparent 55%);
  content: "";
}

.hero-grid {
  display: grid;
  padding-block: 100px;
  grid-template-columns: minmax(0, 660px) 1fr;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 880;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.eyebrow-dark {
  color: #a54c22;
}

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

h1,
h2,
h3 {
  line-height: 1.08;
  text-wrap: balance;
}

h1 {
  max-width: 720px;
  margin-bottom: 22px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3.3rem, 7vw, 6.6rem);
  letter-spacing: -0.055em;
}

h2 {
  margin-bottom: 20px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.3rem, 4.6vw, 4.7rem);
  letter-spacing: -0.045em;
}

h3 {
  margin-bottom: 14px;
  font-size: clamp(1.35rem, 2.2vw, 1.8rem);
}

.hero-lead,
.section-lead {
  color: var(--ink-soft);
  font-size: clamp(1.05rem, 1.8vw, 1.24rem);
}

.hero-lead {
  max-width: 650px;
  margin-bottom: 24px;
  color: rgb(255 255 255 / 80%);
}

.audience-message {
  max-width: 650px;
  margin-bottom: 28px;
  padding: 16px 18px;
  border: 1px solid rgb(255 255 255 / 18%);
  border-radius: 16px;
  background: rgb(8 17 54 / 46%);
  backdrop-filter: blur(10px);
}

.audience-title {
  margin-bottom: 4px;
  color: var(--gold);
  font-size: 0.76rem;
  font-weight: 880;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.audience-text {
  margin-bottom: 0;
  color: rgb(255 255 255 / 84%);
  font-size: 0.98rem;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--gold);
  font-weight: 800;
  text-decoration: none;
}

.text-link::after {
  content: "↓";
}

.section {
  padding-block: clamp(82px, 10vw, 142px);
}

.resources-section {
  background: var(--paper);
}

.curriculum-highlight {
  position: relative;
  display: grid;
  gap: 9px;
  margin-bottom: clamp(58px, 8vw, 92px);
  padding: clamp(24px, 4vw, 38px) clamp(24px, 5vw, 52px);
  overflow: hidden;
  border: 1px solid rgb(80 105 238 / 22%);
  border-radius: 26px;
  background:
    radial-gradient(circle at 100% 0%, rgb(243 90 162 / 14%), transparent 35%),
    linear-gradient(135deg, rgb(80 105 238 / 10%), rgb(255 255 255 / 82%));
  box-shadow: 0 18px 45px rgb(17 25 54 / 8%);
}

.curriculum-highlight::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 6px;
  background: linear-gradient(var(--pink), var(--orange));
  content: "";
}

.curriculum-highlight p {
  margin: 0;
}

.curriculum-text {
  max-width: 940px;
  color: var(--ink);
  font-size: clamp(1.15rem, 2.1vw, 1.55rem);
  font-weight: 790;
  line-height: 1.38;
}

.complementary-note {
  color: var(--ink-soft);
  font-size: 0.96rem;
  font-weight: 680;
}

.section-heading {
  display: grid;
  align-items: start;
  gap: 24px;
  margin-bottom: 46px;
  grid-template-columns: 62px minmax(0, 760px);
}

.compact-heading {
  margin-bottom: 0;
}

.download-intro {
  max-width: 480px;
  margin: 24px 0 0;
}

.section-index {
  margin: 8px 0 0;
  color: #9b4b28;
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.15em;
}

.section-index-light {
  color: var(--gold);
}

.section-heading h2 {
  margin-bottom: 0;
}

.fallback-note {
  max-width: 820px;
  margin: -10px 0 30px 86px;
  padding: 12px 16px;
  border-left: 3px solid var(--orange);
  background: rgb(255 199 97 / 18%);
  color: #704024;
  font-size: 0.94rem;
}

.resource-grid {
  display: grid;
  gap: 22px;
  grid-template-columns: 0.88fr 1.12fr;
}

.resource-card {
  min-width: 0;
  padding: clamp(26px, 4vw, 42px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgb(255 255 255 / 70%);
  box-shadow: 0 12px 34px rgb(17 25 54 / 7%);
}

.guide-card {
  display: flex;
  min-height: 470px;
  flex-direction: column;
  justify-content: space-between;
  background:
    radial-gradient(circle at 100% 0%, rgb(80 105 238 / 12%), transparent 42%),
    var(--surface);
}

.resource-type {
  display: inline-block;
  margin-bottom: 52px;
  color: #9b4b28;
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.resource-card p {
  color: var(--ink-soft);
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 820;
  text-align: center;
  text-decoration: none;
}

.button-primary {
  align-self: flex-start;
  background: linear-gradient(135deg, var(--gold), var(--orange));
  box-shadow: 0 14px 30px rgb(255 132 68 / 25%);
  color: #23182a;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.button-primary:hover {
  box-shadow: 0 18px 38px rgb(255 132 68 / 32%);
  transform: translateY(-2px);
}

.poster-card {
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(0, 0.82fr) minmax(210px, 1fr);
}

.poster-preview {
  position: relative;
  align-self: stretch;
  min-height: 390px;
  padding: 0;
  overflow: hidden;
  border: 0;
  border-radius: 18px;
  background: var(--night);
  box-shadow: var(--shadow);
  cursor: zoom-in;
}

.poster-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  transition: transform 300ms ease;
}

.poster-preview::after {
  position: absolute;
  inset: 48% 0 0;
  background: linear-gradient(transparent, rgb(5 10 34 / 85%));
  content: "";
}

.poster-preview:hover img {
  transform: scale(1.025);
}

.poster-action {
  position: absolute;
  z-index: 1;
  right: 18px;
  bottom: 18px;
  left: 18px;
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgb(255 255 255 / 38%);
  border-radius: 999px;
  background: rgb(8 17 54 / 68%);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 800;
  backdrop-filter: blur(10px);
}

.screenshots-showcase {
  margin-top: clamp(72px, 10vw, 120px);
}

.screenshots-heading {
  max-width: 680px;
  margin-bottom: 34px;
}

.screenshots-heading h3 {
  margin-bottom: 12px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: -0.04em;
}

.screenshots-heading p:last-child {
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 1.03rem;
}

.screenshot-gallery {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.screenshot-card {
  min-width: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: zoom-in;
  font-weight: 790;
  text-align: left;
}

.screenshot-frame {
  display: block;
  aspect-ratio: 0.496;
  margin-bottom: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 16px 34px rgb(8 17 54 / 13%);
  transition: box-shadow 180ms ease, transform 180ms ease;
}

.screenshot-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.screenshot-card:hover .screenshot-frame {
  box-shadow: 0 22px 46px rgb(8 17 54 / 20%);
  transform: translateY(-4px);
}

.download-section {
  background: var(--paper-soft);
}

.section-layout {
  display: grid;
  align-items: center;
  gap: clamp(46px, 8vw, 110px);
  grid-template-columns: 0.72fr 1.28fr;
}

.section-content {
  padding-left: clamp(0px, 4vw, 50px);
  border-left: 1px solid var(--line);
}

.store-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.store-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgb(255 255 255 / 78%);
  box-shadow: 0 14px 34px rgb(8 17 54 / 9%);
  color: var(--ink);
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.store-card:hover {
  box-shadow: 0 20px 42px rgb(8 17 54 / 15%);
  transform: translateY(-3px);
}

.store-badge {
  width: min(100%, 230px);
  height: auto;
}

.click-instruction {
  color: var(--ink);
  font-size: 0.86rem;
  font-weight: 820;
  text-align: center;
}

.choice-divider {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 12px;
  color: var(--ink-soft);
  font-size: 0.76rem;
  font-weight: 820;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.choice-divider::before,
.choice-divider::after {
  height: 1px;
  background: var(--line);
  content: "";
  flex: 1;
}

.qr-frame {
  display: grid;
  width: min(100%, 210px);
  aspect-ratio: 1;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  place-items: center;
}

.store-qr {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.scan-instruction {
  color: var(--ink-soft);
  font-size: 0.88rem;
  font-weight: 720;
  text-align: center;
}

.future-section-dark {
  background:
    radial-gradient(circle at 88% 18%, rgb(243 90 162 / 24%), transparent 30%),
    linear-gradient(135deg, #081136, #192967);
  color: #fff;
}

.future-section:not(.future-section-dark) {
  background: var(--paper);
}

.future-card {
  display: flex;
  min-height: 310px;
  align-items: flex-end;
  justify-content: space-between;
  gap: 48px;
}

.future-card > div {
  max-width: 740px;
}

.future-card h2 {
  margin-bottom: 18px;
}

.future-section-dark .section-lead {
  color: rgb(255 255 255 / 72%);
}

.button-disabled {
  min-width: 160px;
  border-color: rgb(255 255 255 / 30%);
  background: rgb(255 255 255 / 8%);
  color: rgb(255 255 255 / 72%);
  cursor: not-allowed;
}

.button-disabled-dark {
  border-color: var(--line);
  background: rgb(17 25 54 / 5%);
  color: var(--ink-soft);
}

.site-footer {
  padding-block: clamp(48px, 6vw, 72px) 34px;
  border-top: 1px solid var(--line-light);
  background: var(--night);
  color: #fff;
}

.footer-inner {
  display: grid;
  align-items: end;
  gap: 34px 48px;
  grid-template-columns: minmax(0, 1fr) auto;
}

.footer-inner p {
  margin: 0;
  color: rgb(255 255 255 / 62%);
}

.brand-footer {
  margin-bottom: 14px;
  font-size: 1.02rem;
}

.footer-tagline {
  max-width: 620px;
  font-size: clamp(0.95rem, 1.7vw, 1.08rem);
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 720;
  flex-wrap: wrap;
}

.footer-links a {
  color: rgb(255 255 255 / 84%);
  text-underline-offset: 4px;
  text-decoration-color: rgb(255 199 97 / 48%);
}

.footer-links a:hover {
  color: var(--gold);
}

.footer-separator {
  color: rgb(255 255 255 / 30%);
}

.footer-contact {
  display: inline-flex;
  gap: 5px;
  flex-wrap: wrap;
}

.copyright {
  padding-top: 24px;
  border-top: 1px solid var(--line-light);
  font-size: 0.84rem;
  grid-column: 1 / -1;
}

.legal-page {
  background: var(--paper);
}

.legal-header-inner {
  justify-content: space-between;
}

.legal-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  color: rgb(255 255 255 / 78%);
  font-size: 0.9rem;
  font-weight: 760;
  text-decoration: none;
}

.legal-back:hover {
  color: var(--gold);
}

.legal-main {
  padding-top: 76px;
}

.legal-shell {
  max-width: 900px;
}

.legal-hero {
  padding-block: clamp(76px, 10vw, 128px);
  background:
    radial-gradient(circle at 88% 18%, rgb(243 90 162 / 23%), transparent 31%),
    radial-gradient(circle at 15% 90%, rgb(80 105 238 / 28%), transparent 34%),
    linear-gradient(135deg, #081136, #18275e);
  color: #fff;
}

.legal-hero h1 {
  max-width: 820px;
  margin-bottom: 22px;
  font-size: clamp(3rem, 7vw, 5.8rem);
}

.legal-updated {
  margin-bottom: 22px;
  color: var(--gold);
  font-size: 0.86rem;
  font-weight: 800;
}

.legal-summary {
  max-width: 760px;
  margin-bottom: 0;
  color: rgb(255 255 255 / 76%);
  font-size: clamp(1.05rem, 2vw, 1.24rem);
}

.legal-document {
  padding-block: clamp(64px, 9vw, 110px);
}

.legal-document section {
  padding-block: 38px;
  border-top: 1px solid var(--line);
}

.legal-document section:first-child {
  padding-top: 0;
  border-top: 0;
}

.legal-document section:last-child {
  padding-bottom: 0;
}

.legal-document h2 {
  margin-bottom: 18px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  letter-spacing: -0.025em;
}

.legal-document p,
.legal-document li {
  color: #46516b;
}

.legal-document p:last-child,
.legal-document ul:last-child {
  margin-bottom: 0;
}

.legal-document ul {
  margin: 0 0 20px;
  padding-left: 1.35rem;
}

.not-found-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.not-found-main {
  display: flex;
  flex: 1;
}

.not-found-hero {
  display: flex;
  align-items: center;
  width: 100%;
}

.not-found-hero h1 {
  max-width: 760px;
}

.not-found-action {
  margin-top: 34px;
}

.legal-document li + li {
  margin-top: 9px;
}

.legal-document a {
  color: #304cc9;
  font-weight: 700;
  text-underline-offset: 3px;
}

.legal-document strong {
  color: var(--ink);
}

.deletion-callout {
  display: grid;
  justify-items: start;
  gap: 18px;
  margin-top: 28px;
  padding: clamp(22px, 4vw, 32px);
  border: 1px solid rgb(48 76 201 / 18%);
  border-radius: 20px;
  background:
    radial-gradient(circle at 100% 0%, rgb(80 105 238 / 12%), transparent 44%),
    #f4f6ff;
}

.legal-document .button-primary {
  color: #23182a;
}

.deletion-callout p {
  margin: 0;
  font-size: 0.94rem;
}

.poster-dialog {
  width: min(920px, calc(100% - 28px));
  max-width: none;
  max-height: calc(100svh - 28px);
  padding: 0;
  overflow: hidden;
  border: 1px solid rgb(255 255 255 / 20%);
  border-radius: 22px;
  background: #0b143d;
  box-shadow: 0 40px 100px rgb(0 0 0 / 46%);
  color: #fff;
}

.screenshot-dialog {
  width: min(520px, calc(100% - 28px));
  max-width: none;
  max-height: calc(100svh - 28px);
  padding: 0;
  overflow: hidden;
  border: 1px solid rgb(255 255 255 / 20%);
  border-radius: 22px;
  background: #0b143d;
  box-shadow: 0 40px 100px rgb(0 0 0 / 46%);
  color: #fff;
}

.screenshot-dialog::backdrop {
  background: rgb(3 7 24 / 86%);
  backdrop-filter: blur(8px);
}

.screenshot-dialog-canvas {
  max-height: calc(100svh - 98px);
  padding: 16px;
  overflow: auto;
  background: #050a22;
}

.screenshot-dialog-canvas img {
  width: 100%;
  height: auto;
  margin-inline: auto;
  border-radius: 12px;
}

.poster-dialog::backdrop {
  background: rgb(3 7 24 / 86%);
  backdrop-filter: blur(8px);
}

.poster-dialog-header {
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 16px 12px 24px;
  border-bottom: 1px solid var(--line-light);
}

.poster-dialog-header h2 {
  margin: 0;
  font-family: inherit;
  font-size: 1rem;
  letter-spacing: 0;
}

.dialog-close {
  display: grid;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgb(255 255 255 / 25%);
  border-radius: 50%;
  background: rgb(255 255 255 / 8%);
  color: #fff;
  cursor: pointer;
  font-size: 1.7rem;
  line-height: 1;
  place-items: center;
}

.poster-canvas {
  max-height: calc(100svh - 98px);
  padding: 22px;
  overflow: auto;
  background: #050a22;
}

.poster-canvas img {
  width: min(100%, 794px);
  height: auto;
  margin-inline: auto;
  box-shadow: 0 12px 40px rgb(0 0 0 / 35%);
}

@media (max-width: 900px) {
  .hero-backdrop {
    background-image: url("../images/quasar-hero-960.webp");
  }

  .header-inner {
    gap: 18px;
  }

  .menu-toggle {
    position: relative;
    display: grid;
    width: 42px;
    height: 42px;
    padding: 0;
    border: 1px solid rgb(255 255 255 / 28%);
    border-radius: 13px;
    background: rgb(255 255 255 / 8%);
    color: #fff;
    cursor: pointer;
    place-items: center;
  }

  .menu-toggle-lines,
  .menu-toggle-lines::before,
  .menu-toggle-lines::after {
    display: block;
    width: 19px;
    height: 2px;
    border-radius: 99px;
    background: currentColor;
    content: "";
    transition: transform 180ms ease, opacity 180ms ease;
  }

  .menu-toggle-lines::before {
    transform: translateY(-6px);
  }

  .menu-toggle-lines::after {
    transform: translateY(4px);
  }

  .site-header.is-menu-open .menu-toggle-lines {
    background: transparent;
  }

  .site-header.is-menu-open .menu-toggle-lines::before {
    transform: translateY(0) rotate(45deg);
  }

  .site-header.is-menu-open .menu-toggle-lines::after {
    transform: translateY(-2px) rotate(-45deg);
  }

  .primary-navigation {
    position: absolute;
    top: 76px;
    right: 0;
    left: 0;
    display: none;
    padding: 14px 20px 24px;
    border-top: 1px solid var(--line-light);
    background: rgb(8 17 54 / 98%);
    box-shadow: 0 22px 36px rgb(0 0 0 / 20%);
  }

  .site-header.is-menu-open .primary-navigation {
    display: grid;
    gap: 2px;
  }

  .primary-navigation a {
    padding: 12px;
  }

  .primary-navigation a::after {
    display: none;
  }

  .header-actions {
    margin-left: auto;
  }

  .resource-grid,
  .section-layout {
    grid-template-columns: 1fr;
  }

  .screenshot-gallery {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .section-content {
    padding: 36px 0 0;
    border-top: 1px solid var(--line);
    border-left: 0;
  }
}

@media (max-width: 680px) {
  :root {
    --shell: min(100% - 28px, 1160px);
  }

  html {
    scroll-padding-top: 76px;
  }

  .header-inner {
    min-height: 68px;
    gap: 10px;
  }

  .legal-header-inner {
    gap: 12px;
  }

  .legal-back {
    margin-left: auto;
    font-size: 1.15rem;
  }

  .legal-back-text {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }

  .legal-main {
    padding-top: 68px;
  }

  .legal-hero {
    padding-block: 68px;
  }

  .legal-hero h1 {
    font-size: clamp(2.8rem, 14vw, 4.2rem);
  }

  .legal-document section {
    padding-block: 30px;
  }

  .brand {
    gap: 8px;
    font-size: 0.8rem;
    letter-spacing: 0.02em;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 11px;
  }

  .language-picker select {
    min-width: 84px;
    height: 40px;
    padding-right: 27px;
    padding-left: 11px;
  }

  .language-picker::after {
    right: 10px;
  }

  .menu-toggle {
    width: 40px;
    height: 40px;
  }

  .primary-navigation {
    top: 68px;
  }

  .hero-section {
    min-height: 620px;
    padding-top: 68px;
  }

  .hero-backdrop {
    background-position: 61% center;
  }

  .hero-section::before {
    background: linear-gradient(90deg, rgb(5 11 38 / 94%) 0%, rgb(7 15 49 / 76%) 72%, rgb(7 15 49 / 38%) 100%);
  }

  .hero-grid {
    padding-block: 82px 72px;
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 4.6rem);
  }

  .section-heading {
    gap: 12px;
    grid-template-columns: 1fr;
  }

  .section-index {
    margin-top: 0;
  }

  .fallback-note {
    margin-left: 0;
  }

  .guide-card {
    min-height: 400px;
  }

  .poster-card {
    grid-template-columns: 1fr;
  }

  .poster-preview {
    min-height: 470px;
  }

  .screenshot-gallery {
    width: calc(100% + 28px);
    margin-right: -14px;
    margin-left: -14px;
    padding: 4px 14px 26px;
    overflow-x: auto;
    scroll-padding-inline: 14px;
    scroll-snap-type: x mandatory;
    grid-template-columns: none;
    grid-auto-columns: min(68vw, 250px);
    grid-auto-flow: column;
    scrollbar-width: thin;
  }

  .screenshot-card {
    scroll-snap-align: start;
  }

  .button-primary,
  .store-grid {
    width: 100%;
  }

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

  .store-card {
    padding: 22px;
  }

  .qr-frame {
    width: min(100%, 230px);
  }

  .future-card {
    min-height: 340px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: space-between;
  }

  .button-disabled {
    width: 100%;
  }

  .footer-inner {
    gap: 26px;
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }

  .copyright {
    width: 100%;
    padding-top: 20px;
  }

  .poster-canvas {
    padding: 10px;
  }
}

@media (max-width: 380px) {
  .brand span {
    max-width: 72px;
    line-height: 1.05;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}