:root {
  --pink: #E91E63;
  --pink-dark: #C2185B;
  --pink-soft: #FCE4EC;
  --text: #1a1a2e;
  --muted: #5c5c7a;
  --bg: #fffafb;
  --card: #ffffff;
  --shadow: 0 18px 50px rgba(233, 30, 99, 0.12);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

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

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(255, 250, 251, 0.88);
  border-bottom: 1px solid rgba(233, 30, 99, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.logo {
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--pink);
}

.nav {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.95rem;
}

.nav a:not(.btn) {
  color: var(--muted);
}

.nav a:not(.btn):hover {
  color: var(--pink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--pink), var(--pink-dark));
  color: #fff;
  box-shadow: var(--shadow);
}

.btn-secondary {
  background: #fff;
  border: 1px solid rgba(233, 30, 99, 0.18);
  color: var(--pink-dark);
}

.btn-small {
  padding: 8px 16px;
  font-size: 0.9rem;
  background: var(--pink);
  color: #fff;
}

.hero {
  padding: 72px 0 56px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
}

.brand-mark {
  margin: 0 0 10px;
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--pink);
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.concept-line,
.lead {
  margin: 0 0 24px;
  font-size: 1.08rem;
  color: var(--muted);
  max-width: 34rem;
}

.concept-line {
  font-size: 1.12rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 16px;
}

.note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.phone {
  width: min(320px, 100%);
  aspect-ratio: 9 / 18;
  padding: 12px;
  border-radius: 34px;
  background: linear-gradient(160deg, #fff, #ffe8f0);
  box-shadow: var(--shadow);
  border: 1px solid rgba(233, 30, 99, 0.12);
}

.phone-screen {
  position: relative;
  height: 100%;
  border-radius: 24px;
  background: #fafafa;
  overflow: hidden;
}

.card {
  position: absolute;
  inset: 18px 16px 72px;
  border-radius: 20px;
  background: var(--card);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.card-b {
  transform: rotate(4deg) translateY(10px);
  opacity: 0.55;
}

.card-a {
  z-index: 1;
  transform: rotate(-2deg);
}

.card-image {
  height: 74%;
  background: linear-gradient(180deg, #fff5f8 0%, #ffe4ec 100%);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0 2px 0;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center bottom;
  transform: scale(1.55) translateY(5%);
  transform-origin: center bottom;
}

.card-image.alt {
  background: linear-gradient(135deg, #f8bbd0, #f48fb1);
}

.card-meta {
  padding: 14px 16px;
}

.card-meta strong {
  display: block;
  margin-bottom: 4px;
}

.card-meta span {
  display: block;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
}

.swipe-hints {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 18px;
  display: flex;
  justify-content: space-between;
  padding: 0 28px;
  font-size: 1.4rem;
  font-weight: 800;
}

.swipe-hints .left {
  color: #ef5350;
}

.swipe-hints .right {
  color: var(--pink);
}

.features,
.how,
.apps {
  padding: 72px 0;
}

.features {
  background: #fff;
}

.features h2,
.how h2,
.apps h2 {
  margin: 0 0 28px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  text-align: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
}

.feature {
  padding: 24px 20px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid rgba(233, 30, 99, 0.08);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 10px;
}

.feature h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
  max-width: 720px;
  margin-inline: auto;
}

.steps li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid rgba(233, 30, 99, 0.08);
}

.step-num {
  flex: 0 0 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--pink-soft);
  color: var(--pink-dark);
  font-weight: 800;
}

.steps h3 {
  margin: 0 0 6px;
}

.steps p {
  margin: 0;
  color: var(--muted);
}

.cta-box {
  margin-top: 36px;
  padding: 32px;
  border-radius: calc(var(--radius) + 4px);
  text-align: center;
  background: linear-gradient(135deg, rgba(233, 30, 99, 0.08), rgba(233, 30, 99, 0.02));
  border: 1px solid rgba(233, 30, 99, 0.12);
}

.cta-box h3 {
  margin: 0 0 16px;
}

.apps {
  background: #fff;
}

.apps-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.apps p {
  margin: 8px 0 0;
  color: var(--muted);
}

.store-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge {
  padding: 10px 16px;
  border-radius: 12px;
  background: #f5f5f7;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
}

.site-footer {
  padding: 28px 0 40px;
  border-top: 1px solid rgba(233, 30, 99, 0.08);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-inner a:hover {
  color: var(--pink);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.legal-page {
  padding: 48px 0 72px;
  background: #fff;
}

.legal-inner {
  max-width: 720px;
}

.legal-meta {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.legal-page h1 {
  margin: 0 0 32px;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
}

.legal-page section {
  margin-bottom: 28px;
}

.legal-page h2 {
  margin: 0 0 10px;
  font-size: 1.1rem;
  color: var(--pink-dark);
}

.legal-page p,
.legal-page li {
  color: var(--muted);
  line-height: 1.75;
}

.legal-page ul {
  margin: 8px 0 0;
  padding-left: 1.4rem;
}

.legal-back {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(233, 30, 99, 0.1);
}

.legal-back a {
  color: var(--pink);
  font-weight: 600;
}

.guide-actions {
  display: grid;
  gap: 12px;
  margin: 16px 0;
}

.guide-action {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--bg);
  border: 1px solid rgba(233, 30, 99, 0.08);
}

.guide-action p {
  margin: 4px 0 0;
  font-size: 0.92rem;
}

.guide-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-weight: 800;
  font-size: 1.1rem;
}

.guide-icon.left {
  background: #ffebee;
  color: #e53935;
}

.guide-icon.up {
  background: #fff8e1;
  color: #f9a825;
}

.guide-icon.right {
  background: var(--pink-soft);
  color: var(--pink);
}

.share-page {
  padding: 48px 0 72px;
}

.share-inner {
  max-width: 960px;
}

.share-status,
.share-empty {
  text-align: center;
  color: var(--muted);
  padding: 48px 0;
}

.share-eyebrow {
  margin: 0 0 8px;
  color: var(--pink);
  font-weight: 700;
  font-size: 0.9rem;
}

.share-page h1 {
  margin: 0 0 8px;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
}

.share-subtitle {
  margin: 0 0 20px;
  color: var(--muted);
}

.share-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 28px;
}

.share-btn {
  font-size: 0.92rem;
  padding: 10px 16px;
}

.share-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.share-card {
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(233, 30, 99, 0.1);
  box-shadow: 0 8px 24px rgba(233, 30, 99, 0.06);
}

.share-card-image {
  aspect-ratio: 3 / 4;
  background: #f5f5f5;
}

.share-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.share-card-body {
  padding: 14px 16px 16px;
}

.share-card-body h2 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.share-card-series {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 8px;
}

.share-card-link {
  color: var(--pink);
  font-size: 0.88rem;
  font-weight: 600;
}

.share-cta {
  margin-top: 40px;
  text-align: center;
}

.share-hero-card {
  border-radius: 20px;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(233, 30, 99, 0.12);
  box-shadow: 0 12px 36px rgba(233, 30, 99, 0.1);
}

.share-hero-image {
  aspect-ratio: 1 / 1;
  background: #f3f3f7;
}

.share-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.share-hero-body {
  padding: 20px;
}

.share-hero-body h2 {
  margin: 0 0 8px;
  font-size: 1.4rem;
}

.share-hero-series {
  margin: 0 0 12px;
  color: var(--pink-dark);
  font-weight: 700;
}

.share-hero-desc {
  margin: 0 0 12px;
  color: var(--muted);
  white-space: pre-wrap;
}

.share-list-link {
  margin-top: 20px;
  text-align: center;
}

.share-list-link a {
  color: var(--pink-dark);
  font-weight: 700;
  text-decoration: underline;
}

.share-card-actions {
  margin-top: 10px;
}

.feature a {
  color: var(--pink);
  font-weight: 600;
}

.feature a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

body.splash-active {
  overflow: hidden;
}

.splash {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: grid;
  place-items: center;
  background: var(--bg);
  cursor: pointer;
  transition: opacity 0.45s ease, visibility 0.45s ease;
}

.splash.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.splash-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  user-select: none;
}

.splash-heart {
  width: 56px;
  height: 56px;
  fill: var(--pink);
}

.splash-title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--text);
}

.splash-spinner {
  width: 28px;
  height: 28px;
  border: 2.5px solid var(--pink-soft);
  border-top-color: var(--pink);
  border-radius: 50%;
  animation: splash-spin 0.85s linear infinite;
}

@keyframes splash-spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 640px) {
  .nav a:not(.btn) {
    display: none;
  }

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

  .hero {
    padding-top: 40px;
  }
}