:root {
  --ink: #0a0a0a;
  --ink-soft: #1c1c1c;
  --muted: #5c5c5c;
  --paper: #ffffff;
  --paper-warm: #f7f6f3;
  --paper-soft: #f0efeb;
  --line: #e6e5e1;
  --shadow: 0 12px 40px rgba(10, 10, 10, 0.08);
  --radius: 16px;
  --radius-lg: 24px;
  --font: "Plus Jakarta Sans", "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1.25rem, 4vw, 3rem);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease;
}

.topbar.is-scrolled {
  border-bottom-color: var(--line);
}

.brand {
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.04em;
}

.nav {
  display: none;
  gap: 1.75rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--muted);
}

.nav a:hover {
  color: var(--ink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 1.4rem;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background 0.2s ease;
}

.btn:hover {
  background: #222;
  transform: translateY(-1px);
}

.btn-sm {
  min-height: 40px;
  padding: 0 1.05rem;
  font-size: 0.88rem;
}

.split-copy h2 {
  margin: 0 0 1rem;
  font-weight: 800;
  font-size: clamp(1.85rem, 4.2vw, 2.75rem);
  letter-spacing: -0.04em;
  line-height: 1.12;
}

.cta-inner h2 {
  margin: 0 0 1rem;
  font-weight: 800;
  font-size: clamp(1.85rem, 4.2vw, 2.75rem);
  letter-spacing: -0.04em;
  line-height: 1.12;
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.btn-ghost:hover {
  background: var(--paper-warm);
  transform: none;
}

.hero {
  display: grid;
  gap: 2.5rem;
  align-items: center;
  padding: clamp(2.5rem, 6vh, 4rem) clamp(1.25rem, 4vw, 3rem) clamp(3rem, 8vh, 5rem);
  max-width: 1200px;
  margin: 0 auto;
}

.brand-kicker {
  margin: 0 0 1rem;
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
}

.hero h1 {
  margin: 0 0 1rem;
  font-weight: 800;
  font-size: clamp(2.1rem, 5.5vw, 3.6rem);
  letter-spacing: -0.045em;
  line-height: 1.08;
}

.lede {
  margin: 0 0 1.75rem;
  color: var(--muted);
  font-size: 1.08rem;
  max-width: 34rem;
  line-height: 1.65;
}

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

.hero-visual {
  min-height: 280px;
}

.hero-photo {
  position: relative;
  height: min(62vh, 520px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.1), rgba(10, 10, 10, 0.22)),
    radial-gradient(ellipse at 28% 18%, #f6f1e8 0%, transparent 52%),
    radial-gradient(ellipse at 78% 72%, #ddd6cc 0%, transparent 48%),
    linear-gradient(165deg, #efe9df 0%, #d4cdc3 50%, #b7b0a7 100%);
  box-shadow: var(--shadow);
  animation: softIn 0.9s ease both;
}

.hero-photo::before {
  content: "";
  position: absolute;
  inset: 18% 12% auto;
  height: 42%;
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.14)),
    #faf8f4;
  box-shadow: 0 20px 50px rgba(10, 10, 10, 0.12);
  transform: rotate(-2deg);
}

.hero-photo::after {
  content: "";
  position: absolute;
  right: 14%;
  bottom: 22%;
  width: 38%;
  aspect-ratio: 4 / 3;
  border-radius: 14px;
  background: linear-gradient(135deg, #2f2f2f, #121212);
  box-shadow: 0 18px 40px rgba(10, 10, 10, 0.25);
  transform: rotate(4deg);
}

.hero-photo-shade {
  position: absolute;
  inset: auto 0 0;
  height: 42%;
  background: linear-gradient(180deg, transparent, rgba(10, 10, 10, 0.55));
}

.hero-photo-caption {
  position: absolute;
  left: 1.25rem;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 1;
  color: #fff;
  display: grid;
  gap: 0.25rem;
}

.hero-photo-caption span {
  font-size: 0.8rem;
  opacity: 0.8;
  font-weight: 500;
}

.hero-photo-caption strong {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section {
  padding: clamp(4rem, 10vh, 6.5rem) clamp(1.25rem, 4vw, 3rem);
}

.section-head {
  max-width: 40rem;
  margin: 0 0 clamp(2rem, 5vh, 3rem);
}

.section-head h2,
.split-copy h2,
.cta-inner h2 {
  margin: 0 0 1rem;
  font-weight: 800;
  font-size: clamp(1.85rem, 4.2vw, 2.75rem);
  letter-spacing: -0.04em;
  line-height: 1.12;
}

.section-lede {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.65;
  max-width: 36rem;
}

.discover,
.why {
  background: var(--paper-warm);
}

.card-grid {
  display: grid;
  gap: 1.25rem;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  background: var(--paper);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.feature-media {
  height: 180px;
}

.feature-media-a {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.55), transparent 42%),
    linear-gradient(160deg, #ebe6de, #d2ccc2);
}

.feature-media-b {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.5), transparent 45%),
    linear-gradient(160deg, #e6e9ec, #c8ced4);
}

.feature-media-c {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.5), transparent 45%),
    linear-gradient(160deg, #ece4db, #d0c4b6);
}

.feature-media-d {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.55), transparent 40%),
    linear-gradient(160deg, #e8e8e8, #cfcfcf);
}

.feature-body {
  padding: 1.35rem 1.4rem 1.5rem;
}

.feature-body h3 {
  margin: 0 0 0.45rem;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.feature-body p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.split {
  display: grid;
  gap: 2.5rem;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.pain-list {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.pain-list li {
  padding: 1rem 0;
  border-top: 1px solid var(--line);
  font-size: 1.02rem;
  font-weight: 500;
}

.pain-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.split-panel {
  background: var(--paper-warm);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  display: grid;
  place-items: center;
}

.mini-app {
  width: min(100%, 300px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 1.1rem 1rem 1.2rem;
  box-shadow: var(--shadow);
  display: grid;
  gap: 0.75rem;
}

.mini-top {
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.2rem;
}

.mini-block {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.85rem 0.9rem;
  background: var(--paper-warm);
}

.mini-block.warn {
  background: #f7f1ef;
  border-color: #e7d8d3;
}

.mini-label {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
}

.mini-block.warn .mini-label {
  color: #8a4b3c;
}

.mini-title {
  margin: 0.3rem 0 0.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.mini-meta {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.mini-cta {
  margin-top: 0.25rem;
  min-height: 48px;
  border-radius: 14px;
  background: var(--ink);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 600;
}

.why-row {
  display: grid;
  gap: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.why-item {
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}

.why-item h3 {
  margin: 0 0 0.45rem;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

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

.price-row {
  display: grid;
  gap: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.price-card {
  padding: 1.6rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.price-card.featured {
  background: var(--ink);
  color: #fff;
  border-color: transparent;
}

.plan {
  margin: 0;
  font-weight: 600;
  font-size: 0.85rem;
  opacity: 0.7;
}

.yen {
  margin: 0.55rem 0;
  font-size: 2.35rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.yen span {
  font-size: 1rem;
  font-weight: 500;
  margin-left: 0.2rem;
  opacity: 0.7;
}

.plan-note {
  margin: 0;
  opacity: 0.72;
  font-size: 0.95rem;
}

.cta-band {
  padding: clamp(4rem, 12vh, 7rem) clamp(1.25rem, 4vw, 3rem);
  background: var(--paper-soft);
}

.cta-inner {
  max-width: 36rem;
}

.cta-inner .lede {
  color: var(--muted);
}

.fine {
  margin: 1rem 0 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.35rem clamp(1.25rem, 4vw, 3rem);
  border-top: 1px solid var(--line);
  font-size: 0.9rem;
  color: var(--muted);
}

.footer span {
  font-weight: 700;
  color: var(--ink);
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@keyframes softIn {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.985);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 720px) {
  .nav {
    display: flex;
  }

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

  .why-row {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }

  .why-item {
    border-top: 0;
    padding: 0;
  }

  .price-row {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 960px) {
  .hero {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3.5rem;
    min-height: calc(100svh - 72px);
    padding-top: 1rem;
  }

  .split {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
  }
}

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

  .hero-photo,
  .reveal,
  .feature-card {
    animation: none;
    transition: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}