:root {
  color-scheme: light;
  --font-sans:
    "Segoe UI Variable",
    "Segoe UI",
    "Hiragino Sans",
    "Hiragino Kaku Gothic ProN",
    "Yu Gothic UI",
    "Yu Gothic",
    "Meiryo",
    system-ui,
    sans-serif;
  --font-display:
    "Segoe UI Variable Display",
    "Segoe UI",
    "Hiragino Sans",
    "Hiragino Kaku Gothic ProN",
    "Yu Gothic UI",
    "Yu Gothic",
    system-ui,
    sans-serif;
  --bg: #f5f7fb;
  --surface: rgba(255, 255, 255, 0.78);
  --ink: #111827;
  --muted: #64748b;
  --line: rgba(15, 23, 42, 0.1);
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --dark: #111827;
  --radius: 28px;
  --shadow: 0 24px 80px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: #081426;
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

section,
:target {
  scroll-margin-top: 96px;
}

body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-sans);
  font-kerning: normal;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  color: rgba(16, 24, 38, 0.94);
  background: #081426;
  overflow-x: hidden;
}

main {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background:
    linear-gradient(
      180deg,
      #f8fcff 0%,
      #edf8ff 10%,
      #dff1ff 20%,
      #bddcf7 31%,
      #6fa0cf 41%,
      #25496e 52%,
      #0d1b32 64%,
      #081426 74%,
      #0c2340 86%,
      #dff6ff 100%
    );
}

main::before,
main::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

main::before {
  inset: 0;
  z-index: -4;
  background:
    radial-gradient(ellipse 70% 18% at 12% 8%, rgba(126, 207, 255, 0.4), transparent 72%),
    radial-gradient(ellipse 48% 14% at 88% 18%, rgba(209, 194, 255, 0.3), transparent 76%),
    radial-gradient(ellipse 58% 16% at 18% 36%, rgba(55, 172, 255, 0.22), transparent 78%),
    radial-gradient(ellipse 50% 15% at 84% 56%, rgba(36, 224, 236, 0.09), transparent 78%),
    radial-gradient(ellipse 58% 16% at 22% 72%, rgba(132, 94, 255, 0.22), transparent 80%),
    radial-gradient(ellipse 72% 20% at 50% 96%, rgba(120, 217, 255, 0.32), transparent 78%);
}

main::after {
  inset: 0;
  z-index: -2;
  opacity: 0.72;
  background:
    radial-gradient(ellipse 42% 12% at 72% 6%, rgba(255, 255, 255, 0.52) 0%, rgba(255, 255, 255, 0.18) 45%, transparent 76%),
    radial-gradient(ellipse 48% 14% at 24% 30%, rgba(255, 255, 255, 0.34) 0%, rgba(255, 255, 255, 0.12) 48%, transparent 78%),
    radial-gradient(ellipse 37% 12% at 78% 56%, rgba(255, 255, 255, 0.12) 0%, rgba(255, 255, 255, 0.04) 48%, transparent 78%),
    radial-gradient(ellipse 52% 16% at 36% 78%, rgba(255, 255, 255, 0.28) 0%, rgba(255, 255, 255, 0.1) 48%, transparent 78%);
  filter: blur(8px);
}

.ambient-layer,
.grain-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.ambient-layer {
  z-index: -3;
  opacity: 0.82;
  background:
    linear-gradient(118deg, transparent 0%, rgba(255, 255, 255, 0.16) 21%, transparent 39%),
    linear-gradient(142deg, transparent 13%, rgba(98, 210, 255, 0.18) 31%, transparent 54%),
    linear-gradient(162deg, transparent 32%, rgba(181, 152, 255, 0.16) 52%, transparent 72%);
  mask-image:
    radial-gradient(ellipse 120% 70% at 50% 10%, black 0%, transparent 72%),
    radial-gradient(ellipse 120% 80% at 50% 55%, black 0%, transparent 78%),
    radial-gradient(ellipse 120% 70% at 50% 95%, black 0%, transparent 72%);
  filter: blur(0.5px);
}

.grain-layer {
  z-index: -1;
  opacity: 0.055;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.8) 0 1px, transparent 1px),
    radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.7) 0 1px, transparent 1px);
  background-size: 42px 42px, 58px 58px;
  mix-blend-mode: screen;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.78);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  font-weight: 700;
  letter-spacing: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a,
.lang-switch a,
.chip {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 8px 13px;
  border-radius: 999px;
  color: #334155;
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(15, 23, 42, 0.08);
  font-size: 0.9rem;
  font-weight: 700;
}

.nav a.is-active,
.lang-switch a[aria-current="page"],
.chip.is-primary {
  color: #fff;
  background: var(--accent);
}

.lang-switch {
  display: flex;
  gap: 6px;
}

.section {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(62px, 10vw, 130px) 0;
}

.hero {
  min-height: calc(100vh - 64px);
  display: grid;
  align-items: center;
  gap: 46px;
  padding-top: 42px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  max-width: 780px;
  font-size: clamp(2.2rem, 4.8vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

html[lang="ja"] h1,
html[lang="ja"] h2,
html[lang="ja"] .hero-title,
html[lang="ja"] .final-title {
  letter-spacing: -0.025em;
}

html[lang="en"] h1,
html[lang="en"] h2,
html[lang="en"] .hero-title,
html[lang="en"] .final-title {
  letter-spacing: -0.055em;
}

.headline-nowrap {
  white-space: nowrap;
  word-break: keep-all;
  overflow-wrap: normal;
}

h3 {
  font-size: clamp(1.15rem, 1.8vw, 1.55rem);
}

.lead {
  max-width: 36rem;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.4vw, 1.25rem);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.8rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.8rem;
  padding: 0 1.25rem;
  border-radius: 999px;
  color: #fff;
  background: var(--dark);
  font-size: 0.94rem;
  font-weight: 700;
}

.button.is-secondary {
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
}

.visual-card,
.guide-card,
.guide-visual,
.faq-list details,
.mock-desktop {
  border: 1px solid rgba(18, 28, 45, 0.08);
  box-shadow:
    0 24px 80px rgba(40, 86, 140, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px);
}

.mock-desktop {
  position: relative;
  min-height: clamp(360px, 48vw, 560px);
  overflow: hidden;
  border-radius: 38px;
  background:
    radial-gradient(circle at 65% 30%, rgba(59, 130, 246, 0.8), transparent 20rem),
    radial-gradient(circle at 25% 70%, rgba(14, 165, 233, 0.35), transparent 18rem),
    linear-gradient(145deg, #0f172a, #1e293b);
  box-shadow: var(--shadow);
}

.mock-desktop > img {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.quick-mock,
.add-mock,
.wallpaper-mock,
.window-mock,
.desk-mock {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(15, 23, 42, 0.78);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(16px);
}

.quick-mock {
  left: 28px;
  bottom: 30px;
  width: min(76%, 650px);
  padding: 18px;
  border-radius: 22px;
}

.add-mock {
  right: 32px;
  bottom: 82px;
  width: 260px;
  padding: 16px;
  border-radius: 20px;
}

.wallpaper-mock {
  right: 40px;
  top: 42px;
  width: 220px;
  height: 130px;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(96, 165, 250, 0.44), rgba(15, 23, 42, 0.78));
}

.desk-mock {
  left: 42%;
  top: 34%;
  display: grid;
  grid-template-columns: repeat(3, 46px);
  gap: 12px;
  padding: 14px;
  border-radius: 22px;
}

.mock-title {
  margin-bottom: 10px;
  color: #dbeafe;
  font-size: 0.82rem;
  font-weight: 700;
}

.mock-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.mock-item {
  height: 36px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.1);
}

.step-card,
.faq-card {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: 0 16px 45px rgba(15, 23, 42, 0.07);
}

.step-card p,
.faq-card p {
  color: var(--muted);
  line-height: 1.7;
}

.story {
  display: grid;
  gap: 80px;
}

.story-row {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(300px, 1fr);
  align-items: center;
  gap: clamp(26px, 5vw, 72px);
}

.story-row:nth-child(even) {
  grid-template-columns: minmax(300px, 1fr) minmax(0, 0.82fr);
}

.story-row:nth-child(even) .story-copy {
  order: 2;
}

.visual-card {
  min-height: 320px;
  border-radius: 34px;
  background: #111827;
  padding: 22px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.visual-card.is-light {
  background: #ffffff;
}

.mini-panel {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.mini-box {
  min-height: 120px;
  padding: 12px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.mini-line {
  height: 10px;
  margin: 10px 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
}

.before-after {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  height: 100%;
}

.desk-before,
.desk-after {
  min-height: 250px;
  border-radius: 22px;
  background: #e2e8f0;
  position: relative;
  overflow: hidden;
}

.desk-before::before,
.desk-before::after {
  content: "";
  position: absolute;
  inset: 24px;
  background-image: radial-gradient(#64748b 5px, transparent 6px);
  background-size: 48px 44px;
  opacity: 0.8;
}

.desk-after::before {
  content: "";
  position: absolute;
  left: 28px;
  bottom: 28px;
  width: 150px;
  height: 72px;
  border-radius: 20px;
  background: rgba(37, 99, 235, 0.18);
}

.steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 36px;
}

.step-card ol {
  margin: 18px 0 0;
  padding-left: 1.25rem;
  color: #334155;
  line-height: 1.85;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.site-footer {
  padding: 36px clamp(18px, 4vw, 56px);
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.scene {
  width: min(1160px, calc(100% - 36px));
  min-height: auto;
  margin: 0 auto;
  padding: clamp(5rem, 9vw, 9rem) 0;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  align-items: center;
  gap: clamp(28px, 5vw, 70px);
  background: transparent;
}

.hero-scene {
  min-height: min(860px, calc(100vh - 72px));
  padding-top: clamp(5rem, 9vh, 8rem);
  padding-bottom: clamp(3rem, 7vh, 6rem);
  grid-template-columns: minmax(0, 0.82fr) minmax(320px, 1.18fr);
  grid-template-areas:
    "headline headline"
    "copy visual";
}

.hero-headline {
  grid-area: headline;
  position: relative;
  text-align: center;
}

.hero-title {
  max-width: none;
  margin: 0 auto;
  font-size: clamp(2.35rem, 6vw, 5.2rem);
  line-height: 0.98;
}

.hero-copy {
  grid-area: copy;
  max-width: 520px;
  position: relative;
}

.hero-scene .scene-visual {
  grid-area: visual;
}

.scene:nth-child(even):not(.hero-scene) {
  grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
}

.scene:nth-child(even):not(.hero-scene) .scene-copy {
  order: 2;
}

.scene-copy {
  max-width: 520px;
  position: relative;
}

.section-heading,
.guide-copy {
  position: relative;
}

.hero-headline::before,
.hero-copy::before,
.scene-copy::before,
.section-heading::before,
.guide-copy::before {
  content: "";
  position: absolute;
  inset: -1rem -1.25rem;
  z-index: -1;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.28);
  filter: blur(1px);
  opacity: 0.72;
}

.scene-copy h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.scene-copy .lead {
  max-width: 30rem;
  font-size: clamp(0.98rem, 1.25vw, 1.16rem);
}

.scene-visual {
  min-width: 0;
}

.scene .visual-card {
  min-height: clamp(360px, 48vh, 560px);
  display: grid;
  align-items: center;
}

.final-scene {
  min-height: 70vh;
  display: grid;
  grid-template-columns: 1fr;
  place-items: center;
  text-align: center;
}

.final-copy {
  max-width: none;
  width: 100%;
  margin: 0 auto;
}

.final-title {
  max-width: none;
  margin-inline: auto;
  font-size: clamp(2rem, 4.6vw, 4.2rem);
  line-height: 1.05;
}

.feature-intro,
.how-to-overview {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 6rem) 1.25rem clamp(1.5rem, 4vw, 3rem);
  background: transparent;
  text-align: center;
}

.faq-section {
  width: min(840px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(58px, 8vw, 108px) 0 clamp(30px, 5vw, 64px);
  background: transparent;
}

.section-heading {
  max-width: 780px;
}

.section-heading.is-compact {
  max-width: 760px;
  margin: 0 auto;
}

.section-heading h2 {
  font-size: clamp(1.9rem, 3.4vw, 3rem);
}

.section-heading.is-compact h2 {
  margin-bottom: 0.75rem;
}

.section-heading.is-compact .lead {
  margin-left: auto;
  margin-right: auto;
}

.how-to-overview .lead {
  margin-top: 16px;
}

.how-to-index {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.7rem;
  max-width: 760px;
  margin: 2rem auto 0;
}

.how-to-index a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.6rem;
  padding: 0 1.1rem;
  border: 1px solid rgba(20, 25, 35, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: rgba(20, 25, 35, 0.78);
  font-size: 0.92rem;
  font-weight: 600;
  backdrop-filter: blur(16px);
  transition:
    transform 180ms ease,
    background 180ms ease,
    border-color 180ms ease,
    color 180ms ease;
}

.how-to-index a:hover,
.how-to-index a:focus-visible {
  transform: translateY(-1px);
  background: rgba(255, 255, 255, 0.95);
  border-color: rgba(20, 25, 35, 0.22);
  color: rgba(20, 25, 35, 0.96);
}

.how-to-index a.is-active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.guide-section {
  width: min(1120px, calc(100% - 36px));
  min-height: auto;
  margin: 0 auto;
  padding: clamp(4rem, 7vw, 7rem) 0;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1fr);
  align-items: center;
  gap: clamp(24px, 5vw, 70px);
  background: transparent;
}

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

.guide-copy h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.7rem);
}

.guide-copy .lead {
  font-size: clamp(0.98rem, 1.2vw, 1.14rem);
}

.guide-card {
  padding: clamp(24px, 4vw, 38px);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.guide-layout {
  display: grid;
  gap: 18px;
}

.guide-visual {
  position: relative;
  min-height: clamp(220px, 28vw, 360px);
  overflow: hidden;
  border-radius: 30px;
  background:
    radial-gradient(circle at 72% 24%, rgba(37, 99, 235, 0.22), transparent 16rem),
    linear-gradient(145deg, #101827, #1f2937);
  border: 1px solid rgba(15, 23, 42, 0.08);
  box-shadow: 0 18px 52px rgba(15, 23, 42, 0.14);
}

.guide-visual img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
}

.guide-visual img:not([hidden]) + .visual-fallback {
  display: none;
}

.visual-fallback {
  position: absolute;
  inset: 20px;
  display: grid;
  place-items: center;
  border-radius: 22px;
  color: rgba(255, 255, 255, 0.76);
  background:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 42px 42px;
  font-weight: 700;
}

.step-list {
  margin: 0;
  padding-left: 1.25rem;
  color: #263445;
  font-size: clamp(1rem, 1.3vw, 1.16rem);
  line-height: 1.9;
}

.step-list li + li {
  margin-top: 10px;
}

.step-list strong {
  display: block;
  color: var(--ink);
}

.step-list span {
  display: block;
  color: var(--muted);
}

.guide-note {
  margin: 24px 0 0;
  padding-top: 18px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  line-height: 1.75;
}

.faq-list {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}

.faq-list details {
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.06);
}

.faq-list summary {
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 700;
}

.faq-list p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
  line-height: 1.7;
}

.wallpaper-mock.is-inline {
  position: relative;
  inset: auto;
  width: 100%;
  height: min(52vh, 420px);
}

.is-dark-section {
  color: rgba(255, 255, 255, 0.94);
}

.is-dark-section .lead,
.is-dark-section .step-list span,
.is-dark-section .guide-note {
  color: rgba(255, 255, 255, 0.72);
}

.is-dark-section .eyebrow {
  color: rgba(166, 223, 255, 0.88);
}

.is-dark-section .step-list,
.is-dark-section .step-list strong {
  color: rgba(255, 255, 255, 0.92);
}

.is-dark-section .visual-card,
.is-dark-section .guide-card,
.is-dark-section .guide-visual,
.is-dark-section .faq-list details {
  color: rgba(255, 255, 255, 0.92);
  background: rgba(8, 18, 34, 0.5);
  border-color: rgba(255, 255, 255, 0.13);
  box-shadow:
    0 32px 90px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(20px);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 720ms ease, transform 720ms ease;
}

[data-reveal].is-visible,
.reduce-motion [data-reveal] {
  opacity: 1;
  transform: none;
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-actions {
    gap: 0.65rem;
  }

  .button {
    min-height: 2.6rem;
    padding: 0 1rem;
    font-size: 0.9rem;
  }

  .how-to-index {
    justify-content: flex-start;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding: 0 1.25rem 0.5rem;
    margin-left: -1.25rem;
    margin-right: -1.25rem;
    scrollbar-width: none;
  }

  .how-to-index::-webkit-scrollbar {
    display: none;
  }

  .how-to-index a {
    flex: 0 0 auto;
    font-size: 0.88rem;
    min-height: 2.4rem;
    padding: 0 1rem;
  }

  .nav {
    justify-content: flex-start;
  }

  .steps,
  .faq-grid,
  .story-row,
  .story-row:nth-child(even),
  .scene,
  .scene:nth-child(even):not(.hero-scene),
  .hero-scene,
  .guide-section {
    grid-template-columns: 1fr;
  }

  .hero-scene {
    grid-template-areas:
      "headline"
      "visual"
      "copy";
    text-align: center;
  }

  .hero-copy {
    margin-inline: auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .story-row:nth-child(even) .story-copy,
  .scene:nth-child(even):not(.hero-scene) .scene-copy {
    order: 0;
  }

  .mock-grid,
  .mini-panel,
  .before-after {
    grid-template-columns: 1fr;
  }

  .add-mock,
  .desk-mock,
  .wallpaper-mock {
    display: none;
  }

  .quick-mock {
    width: calc(100% - 42px);
    left: 21px;
    bottom: 22px;
  }
}

@media (max-width: 560px) {
  .hero-title {
    font-size: clamp(1.55rem, 7.4vw, 2.25rem);
  }

  .final-title {
    font-size: clamp(1.4rem, 6.6vw, 2rem);
  }
}

@media (prefers-reduced-motion: no-preference) {
  .ambient-layer {
    animation: ambientFlow 38s ease-in-out infinite alternate;
  }

  main::before {
    animation: ambientGlow 44s ease-in-out infinite alternate;
  }
}

@keyframes ambientFlow {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }

  to {
    transform: translate3d(0, -1.2%, 0) scale(1.025);
  }
}

@keyframes ambientGlow {
  from {
    opacity: 0.92;
  }

  to {
    opacity: 0.72;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Site polish: foreground only. Keep the current procedural background. */
:root {
  --text-strong: rgba(15, 23, 42, 0.94);
  --text-soft: rgba(15, 23, 42, 0.66);
  --dark-text-strong: rgba(255, 255, 255, 0.94);
  --dark-text-soft: rgba(226, 241, 255, 0.74);
}

html,
body {
  overflow-x: hidden;
}

.site-header {
  z-index: 50;
  min-height: 64px;
  padding: 0.75rem clamp(1rem, 4vw, 3rem);
  gap: 1.25rem;
  background: rgba(248, 252, 255, 0.66);
  border-bottom: 1px solid rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(22px) saturate(150%);
}

.brand {
  color: rgba(15, 23, 42, 0.92);
  letter-spacing: -0.03em;
}

.nav {
  gap: clamp(0.6rem, 1.6vw, 1.2rem);
  font-size: 0.88rem;
}

.site-header .nav a,
.site-header .lang-switch a {
  min-height: auto;
  padding: 0;
  color: rgba(15, 23, 42, 0.68);
  background: transparent;
  border: 0;
  transition: color 160ms ease, opacity 160ms ease;
}

.site-header .nav a:hover,
.site-header .nav a:focus-visible,
.site-header .lang-switch a:hover,
.site-header .lang-switch a:focus-visible {
  color: rgba(15, 23, 42, 0.96);
}

.site-header .nav a.is-active,
.site-header .lang-switch a[aria-current="page"] {
  color: #fff;
  padding: 0.45rem 0.85rem;
  background: rgba(37, 99, 235, 0.92);
  border-radius: 999px;
}

.lang-switch {
  align-items: center;
  gap: 0.45rem;
  padding-left: 0.65rem;
  border-left: 1px solid rgba(15, 23, 42, 0.14);
}

.hero-scene {
  min-height: min(880px, calc(100vh - 64px));
  padding-top: clamp(4.5rem, 8vh, 7rem);
  padding-bottom: clamp(3.5rem, 8vh, 6rem);
  gap: clamp(2rem, 5vw, 5rem);
}

.hero-title {
  font-size: clamp(2.1rem, 5.8vw, 5rem);
  line-height: 1;
}

.hero-copy {
  max-width: 34rem;
}

.scene-copy h2 {
  line-height: 1.08;
}

.section-heading h2 {
  line-height: 1.1;
}

.guide-copy h2 {
  font-size: clamp(1.7rem, 3vw, 2.55rem);
  line-height: 1.12;
}

.final-title {
  font-size: clamp(1.8rem, 4.4vw, 4rem);
}

html[lang="en"] h1,
html[lang="en"] h2,
html[lang="en"] .hero-title,
html[lang="en"] .final-title {
  letter-spacing: -0.05em;
}

.button {
  min-height: 2.75rem;
  padding: 0 1.2rem;
  color: rgba(255, 255, 255, 0.96);
  background: rgba(37, 99, 235, 0.92);
  border: 1px solid rgba(59, 130, 246, 0.22);
  font-size: 0.92rem;
  text-decoration: none;
  box-shadow:
    0 14px 34px rgba(37, 99, 235, 0.24),
    inset 0 1px 0 rgba(255, 255, 255, 0.28);
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease;
}

.button.is-secondary {
  color: rgba(15, 23, 42, 0.82);
  background: rgba(255, 255, 255, 0.62);
  border-color: rgba(15, 23, 42, 0.1);
  box-shadow:
    0 14px 34px rgba(15, 23, 42, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.mock-desktop {
  min-height: clamp(320px, 42vw, 540px);
  border-radius: clamp(24px, 3vw, 36px);
  background:
    radial-gradient(circle at 18% 18%, rgba(125, 211, 252, 0.35), transparent 32%),
    radial-gradient(circle at 84% 22%, rgba(167, 139, 250, 0.22), transparent 34%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.72), rgba(225, 242, 255, 0.46));
  border: 1px solid rgba(255, 255, 255, 0.62);
  box-shadow:
    0 34px 120px rgba(17, 24, 39, 0.22),
    0 8px 28px rgba(59, 130, 246, 0.14),
    inset 0 1px 0 rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(24px);
}

.quick-mock,
.add-mock,
.desk-mock,
.mini-box {
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(255, 255, 255, 0.56);
  box-shadow:
    0 16px 44px rgba(15, 23, 42, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px);
}

.mock-title {
  color: rgba(15, 23, 42, 0.68);
  font-size: 0.78rem;
  letter-spacing: -0.02em;
}

.mock-item,
.mini-line {
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.35), rgba(125, 211, 252, 0.22));
}

.visual-card,
.guide-card,
.guide-visual,
.faq-list details {
  border-radius: clamp(22px, 2.4vw, 32px);
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow:
    0 28px 90px rgba(15, 23, 42, 0.1),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px) saturate(140%);
}

.is-dark-section {
  color: var(--dark-text-strong);
}

.is-dark-section .lead,
.is-dark-section .step-list span,
.is-dark-section .guide-note {
  color: var(--dark-text-soft);
}

.is-dark-section .eyebrow {
  color: rgba(147, 218, 255, 0.88);
}

.is-dark-section .how-to-index a {
  color: rgba(255, 255, 255, 0.88);
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.16);
}

.is-dark-section .how-to-index a:hover,
.is-dark-section .how-to-index a:focus-visible {
  color: rgba(255, 255, 255, 0.96);
  background: rgba(255, 255, 255, 0.16);
}

.is-dark-section .visual-card,
.is-dark-section .guide-card,
.is-dark-section .guide-visual {
  color: rgba(255, 255, 255, 0.92);
  background: rgba(8, 18, 34, 0.52);
  border-color: rgba(255, 255, 255, 0.13);
  box-shadow:
    0 32px 90px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.scene,
.guide-section {
  max-width: 1280px;
  padding: clamp(5rem, 9vw, 8.5rem) clamp(1.25rem, 5vw, 5rem);
}

.feature-intro,
.how-to-overview {
  max-width: 1120px;
  padding: clamp(4.5rem, 8vw, 7rem) clamp(1.25rem, 5vw, 5rem);
}

.feature-intro {
  padding-bottom: clamp(24px, 4vw, 48px);
}

.faq-section {
  position: relative;
  width: min(calc(100% - 48px), 960px);
  max-width: 960px;
  margin-inline: auto;
  padding: clamp(72px, 8vw, 104px) 0;
}

.faq-section .section-heading h2 {
  color: #f8fbff;
}

.faq-section .section-heading .eyebrow {
  color: #67c7ff;
}

.how-to-index a {
  min-height: 2.45rem;
  padding: 0 1.05rem;
  font-size: 0.9rem;
  font-weight: 700;
  border-color: rgba(15, 23, 42, 0.1);
  background: rgba(255, 255, 255, 0.58);
  color: rgba(15, 23, 42, 0.74);
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    color 160ms ease;
}

.how-to-index a:hover,
.how-to-index a:focus-visible {
  transform: translateY(-1px);
  border-color: rgba(59, 130, 246, 0.28);
  color: rgba(15, 23, 42, 0.94);
  background: rgba(255, 255, 255, 0.78);
}

.step-list {
  list-style: none;
  counter-reset: step;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.step-list li {
  counter-increment: step;
  position: relative;
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: 0.85rem;
  align-items: start;
  padding: 1rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.42);
  border: 1px solid rgba(255, 255, 255, 0.44);
}

.step-list li + li {
  margin-top: 0;
}

.step-list li::before {
  content: counter(step);
  width: 2.25rem;
  height: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.92);
  color: #fff;
  font-size: 0.86rem;
  font-weight: 700;
  box-shadow: 0 10px 26px rgba(37, 99, 235, 0.24);
}

.step-list strong {
  margin-bottom: 0.25rem;
  font-size: 0.98rem;
}

.step-list span {
  color: rgba(15, 23, 42, 0.62);
  font-size: 0.92rem;
  line-height: 1.65;
}

.is-dark-section .step-list li {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
}

.is-dark-section .step-list span {
  color: rgba(226, 241, 255, 0.7);
}

.guide-visual {
  min-height: 280px;
  display: grid;
  place-items: center;
}

.visual-fallback {
  position: relative;
  inset: auto;
  width: min(82%, 420px);
  aspect-ratio: 16 / 10;
  border-radius: 24px;
  background:
    radial-gradient(circle at 20% 18%, rgba(125, 211, 252, 0.3), transparent 34%),
    radial-gradient(circle at 80% 76%, rgba(167, 139, 250, 0.22), transparent 38%),
    rgba(255, 255, 255, 0.26);
  border: 1px solid rgba(255, 255, 255, 0.36);
  color: rgba(15, 23, 42, 0.52);
  letter-spacing: -0.03em;
}

.is-dark-section .visual-fallback {
  background:
    radial-gradient(circle at 20% 18%, rgba(56, 189, 248, 0.2), transparent 34%),
    radial-gradient(circle at 80% 76%, rgba(129, 140, 248, 0.18), transparent 38%),
    rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.12);
  color: rgba(226, 241, 255, 0.6);
}

.faq-list {
  width: min(100%, 760px);
  max-width: none;
  margin: 32px auto 0;
  gap: 10px;
}

.faq-list details {
  padding: 0;
  overflow: hidden;
}

.faq-section + .final-scene {
  padding-top: clamp(64px, 8vw, 96px);
}

.faq-list summary {
  list-style: none;
  padding: 1.1rem 1.25rem;
  font-weight: 700;
  color: rgba(15, 23, 42, 0.86);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 1.55rem;
  height: 1.55rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.1);
  color: rgba(37, 99, 235, 0.92);
  font-weight: 700;
}

.faq-list details[open] summary::after {
  content: "-";
}

.faq-list details p {
  padding: 0 1.25rem 1.15rem;
  color: rgba(15, 23, 42, 0.76);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 700ms ease,
    transform 700ms cubic-bezier(0.22, 1, 0.36, 1);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 720px) {
  .site-header {
    min-height: 56px;
    padding: 0.65rem 1rem;
  }

  .nav {
    gap: 0.55rem;
    font-size: 0.78rem;
  }

  .lang-switch {
    gap: 0.35rem;
    padding-left: 0.45rem;
  }

  .scene,
  .guide-section,
  .feature-intro,
  .how-to-overview,
  .faq-section {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .guide-layout {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .scene {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .scene-copy,
  .guide-copy,
  .section-heading {
    text-align: center;
    margin-inline: auto;
  }

  .visual-card,
  .guide-card,
  .guide-visual,
  .mock-desktop {
    border-radius: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Foundation fix: typography and layout only. Keep current background/visual effects. */
html[lang="ja"] body,
html[lang="ja"] button,
html[lang="ja"] input {
  font-family:
    "LINE Seed JP",
    "Yu Gothic UI",
    "Yu Gothic",
    "Meiryo",
    sans-serif;
  font-weight: 400;
  font-kerning: normal;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

html[lang="en"] body,
html[lang="en"] button,
html[lang="en"] input {
  font-family:
    "Segoe UI Variable",
    "Segoe UI",
    system-ui,
    sans-serif;
  font-weight: 400;
  font-kerning: normal;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

html[lang="ja"] h1,
html[lang="ja"] h2,
html[lang="ja"] h3,
html[lang="ja"] .hero-title,
html[lang="ja"] .final-title {
  font-family: inherit;
}

body {
  font-weight: 400;
}

button,
.button,
.nav,
.step-list strong,
.faq-list summary {
  font-weight: 700;
}

body,
p,
.lead,
.step-list span,
.faq-list p {
  font-weight: 400;
}

h1,
h2,
h3,
.hero-title,
.final-title {
  font-weight: 700;
}

.hero-headline::before,
.hero-copy::before,
.scene-copy::before,
.section-heading::before,
.guide-copy::before {
  display: none;
}

.hero-scene {
  width: min(calc(100% - 48px), 1120px);
  min-height: auto;
  margin-inline: auto;
  padding: clamp(64px, 9vw, 112px) 0;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-areas:
    "headline"
    "copy"
    "visual";
  justify-items: center;
  text-align: center;
  gap: 0;
}

.hero-headline {
  width: 100%;
}

.hero-headline .eyebrow {
  display: none;
}

.hero-title {
  max-width: min(100%, 14em);
  margin: 0 auto;
  color: #111827;
  font-size: clamp(22px, 5.1vw, 64px);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

html[lang="ja"] .hero-title {
  white-space: nowrap;
  letter-spacing: -0.025em;
}

html[lang="en"] .hero-title {
  white-space: normal;
  text-wrap: balance;
}

.hero-copy {
  max-width: 680px;
  margin-top: 24px;
}

.hero-copy .lead {
  margin: 0 auto;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.8;
  color: rgba(17, 24, 39, 0.66);
}

.hero-actions {
  justify-content: center;
  margin-top: 24px;
}

.hero-scene .scene-visual {
  width: min(760px, 100%);
  margin-top: clamp(40px, 6vw, 72px);
}

.guide-section {
  width: min(calc(100% - 48px), 1040px);
  margin-inline: auto;
  padding: clamp(72px, 8vw, 104px) 0;
  display: grid;
  grid-template-columns: minmax(220px, 0.78fr) minmax(0, 1.22fr);
  align-items: center;
  gap: clamp(36px, 6vw, 72px);
}

.guide-copy {
  min-width: 0;
  max-width: none;
  margin: 0;
  text-align: left;
}

.guide-layout {
  min-width: 0;
  display: block;
  width: 100%;
  margin: 0;
}

.guide-section--reverse .guide-copy {
  order: 2;
}

.guide-section--reverse .guide-layout {
  order: 1;
}

.guide-visual {
  display: none;
}

.guide-card {
  width: 100%;
  padding: 12px 28px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 24px 72px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(20px);
}

.feature-scene {
  min-height: auto;
  padding-top: clamp(56px, 7vw, 88px);
  padding-bottom: clamp(56px, 7vw, 88px);
}

.feature-scene .scene-visual,
.feature-scene .scene-copy {
  align-self: center;
}

.is-dark-section .copy-on-light,
.is-dark-section .copy-on-light h1,
.is-dark-section .copy-on-light h2,
.is-dark-section .copy-on-light h3 {
  color: #10243d;
}

.is-dark-section .copy-on-light .lead {
  color: rgba(16, 36, 61, 0.68);
}

.is-dark-section .copy-on-light .eyebrow {
  color: #2563eb;
}

.is-dark-section .copy-on-light h2 {
  text-shadow: none;
}

.is-dark-section .guide-card {
  color: #f8fbff;
  padding: 12px 28px;
  background: rgba(18, 32, 55, 0.84);
  border-color: rgba(200, 224, 255, 0.16);
  box-shadow:
    0 28px 80px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
}

.step-list {
  counter-reset: step;
  margin: 0;
  padding: 0;
  list-style: none;
  display: block;
}

.step-list li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 14px;
  row-gap: 4px;
  align-items: start;
  padding: 22px 0;
  background: transparent;
  border: 0;
  border-radius: 0;
}

.step-list li + li {
  border-top: 1px solid rgba(255, 255, 255, 0.13);
}

.is-dark-section .step-list li {
  background: transparent;
  border: 0;
}

.is-dark-section .step-list li + li {
  border-top: 1px solid rgba(210, 230, 255, 0.15);
}

.step-list li::before {
  content: counter(step);
  grid-column: 1;
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #2f7df4;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  box-shadow: none;
}

.step-list li > strong,
.step-list li > span {
  grid-column: 2;
  min-width: 0;
}

.step-list li > strong {
  grid-row: 1;
  margin: 0;
  color: inherit;
  font-size: 1rem;
  line-height: 1.5;
}

.step-list li > span {
  grid-row: 2;
  color: rgba(17, 24, 39, 0.66);
  font-size: 0.94rem;
  line-height: 1.75;
  word-break: normal;
  overflow-wrap: normal;
  line-break: strict;
}

.is-dark-section {
  color: #f7faff;
}

.is-dark-section h1,
.is-dark-section h2,
.is-dark-section h3,
.is-dark-section strong,
.is-dark-section summary {
  color: #f8fbff;
}

.is-dark-section .lead {
  color: rgba(232, 240, 251, 0.8);
}

.is-dark-section .step-list span,
.is-dark-section .faq-list p {
  color: rgba(226, 236, 249, 0.76);
}

.is-dark-section .eyebrow {
  color: #67c7ff;
}

.is-dark-section .step-list li::before {
  background: #3288f5;
  color: #fff;
  box-shadow: 0 8px 24px rgba(50, 136, 245, 0.32);
}

.is-dark-section h2 {
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.24);
}

.scene-copy h2 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
  letter-spacing: -0.035em;
}

.guide-copy h2 {
  font-size: clamp(28px, 3.5vw, 42px);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

html[lang="ja"] .final-title,
html[lang="ja"] .scene-copy h2,
html[lang="ja"] .guide-copy h2,
html[lang="ja"] .section-heading h2 {
  letter-spacing: -0.018em;
}

html[lang="ja"] .lead,
html[lang="ja"] .step-list span,
html[lang="ja"] .faq-list p {
  letter-spacing: 0;
}

.lead {
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.8;
}

.eyebrow {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

@media (max-width: 760px) {
  .hero-scene,
  .guide-section {
    width: min(calc(100% - 28px), 1040px);
  }

  html[lang="ja"] .hero-title {
    white-space: normal;
    text-wrap: balance;
  }

  .guide-layout {
    width: 100%;
  }

  .guide-section,
  .guide-section--reverse {
    grid-template-columns: 1fr;
    gap: 24px;
    text-align: center;
  }

  .guide-section .guide-copy,
  .guide-section--reverse .guide-copy {
    order: 1;
    text-align: center;
  }

  .guide-section .guide-layout,
  .guide-section--reverse .guide-layout {
    order: 2;
  }

  .guide-card {
    padding: 10px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Reveal/z-index guard: keep background layers behind readable content. */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  filter: none;
}

[data-reveal].is-visible,
.reduce-motion [data-reveal] {
  opacity: 1;
  transform: translateY(0);
  filter: none;
}

main > section {
  position: relative;
  z-index: 1;
  opacity: 1;
  filter: none;
}

html[lang="ja"] :where(h1, h2, h3, p, li, span, summary, a, strong, small) {
  word-break: auto-phrase;
  line-break: strict;
}

.guide-section,
.guide-copy,
.guide-layout,
.guide-card {
  opacity: 1;
  filter: none;
}

.ambient-layer,
.grain-layer {
  z-index: 0;
  pointer-events: none;
}

#feature-quick-access.feature-video-scene,
#feature-add-items.feature-video-scene,
#feature-bulk-launch.feature-video-scene,
#feature-clean-up.feature-video-scene {
  width: min(1380px, calc(100% - 48px));
  grid-template-columns: minmax(0, 1.7fr) minmax(240px, 0.55fr);
  gap: clamp(32px, 5vw, 76px);
}

.feature-video-frame {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.52);
  border-radius: clamp(20px, 2.5vw, 34px);
  background: #0f172a;
  box-shadow: 0 28px 90px rgba(30, 91, 145, 0.2);
}

.feature-video-frame video {
  display: block;
  width: 100%;
  height: auto;
}

@media (max-width: 820px) {
  #feature-quick-access.feature-video-scene,
  #feature-add-items.feature-video-scene,
  #feature-bulk-launch.feature-video-scene,
  #feature-clean-up.feature-video-scene {
    width: min(100% - 28px, 720px);
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .feature-video-scene .scene-copy {
    max-width: 100%;
    text-align: center;
  }

  .feature-video-scene .scene-copy .lead {
    margin-inline: auto;
  }
}

#how-to,
#how-to ~ section {
  color: #f8fafc;
}

#feature-bulk-launch .scene-copy,
#feature-bulk-launch .scene-copy h2 {
  color: #111827;
  text-shadow: none;
}

#feature-bulk-launch .scene-copy .lead {
  color: rgba(17, 24, 39, 0.68);
}

#feature-bulk-launch .scene-copy .eyebrow {
  color: #2563eb;
}

#feature-clean-up .scene-copy,
#feature-clean-up .scene-copy h2,
#feature-clean-up .scene-copy .lead,
#feature-clean-up .scene-copy .eyebrow {
  color: #111827;
  text-shadow: none;
}

#feature-wallpaper .scene-copy,
#feature-wallpaper .scene-copy h2 {
  color: #d9e0ea;
  text-shadow: 0 2px 24px rgba(15, 23, 42, 0.28);
}

#feature-wallpaper .scene-copy .lead,
#feature-wallpaper .scene-copy .eyebrow {
  color: #c3ccd8;
}

#how-to .section-heading h2,
#how-to ~ .guide-section .guide-copy h2,
#faq .section-heading h2,
#support .final-title {
  color: #f8fafc;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

#how-to .section-heading .lead,
#how-to ~ .guide-section .guide-copy .lead,
#support .lead {
  color: rgba(248, 250, 252, 0.78);
}

#how-to .section-heading .eyebrow,
#how-to ~ .guide-section .guide-copy .eyebrow,
#faq .section-heading .eyebrow,
#support .eyebrow {
  color: rgba(248, 250, 252, 0.72);
}

#how-to .how-to-index a {
  color: #f8fafc;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.18);
}

.site-footer {
  color: rgba(248, 250, 252, 0.72);
}

#top.hero-scene {
  padding-top: clamp(52px, 6vw, 72px);
  padding-bottom: clamp(36px, 4vw, 52px);
}

#top .hero-title {
  font-size: clamp(34px, 4.7vw, 58px);
}

#top .hero-copy {
  margin-top: 18px;
}

.feature-intro {
  padding-top: clamp(30px, 4vw, 48px);
  padding-bottom: clamp(18px, 2.5vw, 30px);
}

#feature-quick-access.feature-video-scene,
#feature-add-items.feature-video-scene,
#feature-bulk-launch.feature-video-scene,
#feature-clean-up.feature-video-scene {
  padding-top: clamp(40px, 4.5vw, 60px);
  padding-bottom: clamp(48px, 5vw, 72px);
}

#feature-wallpaper.feature-text-scene {
  min-height: clamp(280px, 42vh, 420px);
  grid-template-columns: 1fr;
  place-items: center;
  padding-top: clamp(64px, 8vw, 104px);
  padding-bottom: clamp(64px, 8vw, 104px);
  text-align: center;
}

#feature-wallpaper.feature-text-scene .scene-copy {
  width: min(100%, 720px);
  max-width: 720px;
}

#feature-wallpaper.feature-text-scene .lead {
  margin-inline: auto;
}

.guide-accordion {
  display: block;
  width: min(calc(100% - 48px), 900px);
  margin-inline: auto;
  padding: 0;
  border-top: 1px solid rgba(17, 24, 39, 0.14);
}

.guide-accordion + .guide-accordion {
  margin-top: 0;
}

.guide-accordion > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 8px;
  color: #f8fafc;
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.guide-accordion > summary::-webkit-details-marker {
  display: none;
}

.guide-accordion > summary::after {
  content: "+";
  color: #2563eb;
  font-size: 24px;
  font-weight: 400;
}

.guide-accordion[open] > summary::after {
  content: "\2212";
}

.guide-accordion > summary:hover,
.guide-accordion > summary:focus-visible {
  color: #ffffff;
}

.guide-accordion-body {
  display: grid;
  grid-template-columns: minmax(180px, 0.65fr) minmax(0, 1.35fr);
  gap: clamp(24px, 5vw, 56px);
  align-items: start;
  padding: 4px 8px 40px;
}

.guide-accordion-body .guide-copy {
  text-align: left;
}

@media (max-width: 820px) {
  #top.hero-scene {
    padding-top: 36px;
    padding-bottom: 30px;
  }

  .feature-intro {
    padding-top: 26px;
    padding-bottom: 14px;
  }

  #feature-quick-access.feature-video-scene,
  #feature-add-items.feature-video-scene,
  #feature-bulk-launch.feature-video-scene,
  #feature-clean-up.feature-video-scene {
    padding-top: 32px;
    padding-bottom: 48px;
  }

  #feature-wallpaper.feature-text-scene {
    min-height: 260px;
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .guide-accordion {
    width: min(100% - 28px, 900px);
  }

  .guide-accordion-body {
    grid-template-columns: 1fr;
    gap: 18px;
    padding: 0 4px 32px;
  }
}