:root {
  --ink: #2c2329;
  --muted: #6f6068;
  --paper: #fff8f3;
  --surface: #ffffff;
  --soft: #fff0f5;
  --coral: #ef5d86;
  --coral-dark: #c73f66;
  --mint: #30aa8a;
  --sky: #4aaedc;
  --violet: #7860c8;
  --lemon: #f5c74c;
  --line: rgba(44, 35, 41, 0.13);
  --shadow: 0 22px 56px rgba(72, 50, 64, 0.18);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", sans-serif;
  letter-spacing: 0;
  line-height: 1.75;
}

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

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: 24px;
  min-height: 74px;
  padding: 12px clamp(18px, 5vw, 64px);
  background: rgba(255, 248, 243, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: min(176px, 42vw);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 28px);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(12px, 3vw, 28px);
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 800;
  white-space: nowrap;
}

.nav-links a {
  border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--coral-dark);
  border-color: var(--coral);
}

.app-store-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  height: 48px;
  max-width: 100%;
  transition: transform 0.15s ease;
}

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

.app-store-badge img {
  width: auto;
  height: 100%;
}

.final-badge {
  margin-top: 6px;
}

.hero {
  position: relative;
  min-height: min(760px, 82svh);
  overflow: hidden;
  background-image: var(--hero-image);
  background-position: center;
  background-size: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(47, 33, 43, 0.76) 0%, rgba(47, 33, 43, 0.46) 48%, rgba(255, 248, 243, 0.18) 100%),
    linear-gradient(180deg, rgba(255, 248, 243, 0.02) 0%, rgba(255, 248, 243, 0.34) 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(1160px, calc(100% - 40px));
  min-height: min(760px, 82svh);
  margin: 0 auto;
  padding: clamp(42px, 7vw, 82px) 0 clamp(44px, 7vw, 72px);
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 670px;
  color: #ffffff;
  text-shadow: 0 2px 18px rgba(47, 36, 40, 0.34);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--coral);
  font-size: 0.9rem;
  font-weight: 900;
  letter-spacing: 0;
}

.hero .eyebrow,
.final-cta .eyebrow {
  color: #ffe38a;
}

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

h1 {
  max-width: 720px;
  margin-bottom: 20px;
  font-size: clamp(3rem, 6.4vw, 5.4rem);
  line-height: 1.07;
  font-weight: 900;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.22;
  font-weight: 900;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.12rem;
  line-height: 1.35;
  font-weight: 900;
}

.hero-lead {
  max-width: 610px;
  margin-bottom: 24px;
  font-size: clamp(1.04rem, 1.8vw, 1.22rem);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 18px;
  border: 2px solid transparent;
  border-radius: 8px;
  font-weight: 900;
  line-height: 1.2;
}

.button.primary {
  color: #ffffff;
  background: var(--coral);
  box-shadow: 0 14px 34px rgba(239, 93, 134, 0.3);
}

.button.primary:hover,
.button.primary:focus-visible {
  background: var(--coral-dark);
}

.button.secondary {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.1);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  background: rgba(255, 255, 255, 0.22);
}

.hero-note {
  max-width: 540px;
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.96rem;
}

.hero-visual {
  position: absolute;
  right: clamp(0px, 4vw, 46px);
  bottom: -76px;
  z-index: 1;
  width: min(330px, 32vw);
  min-width: 250px;
  pointer-events: none;
}

.phone-shot {
  border: 8px solid rgba(255, 255, 255, 0.9);
  border-radius: 36px;
  box-shadow: var(--shadow);
}

.main-shot {
  transform: rotate(2deg);
}

.navigator {
  position: absolute;
  left: -80px;
  bottom: 74px;
  width: 138px;
  filter: drop-shadow(0 16px 28px rgba(47, 36, 40, 0.24));
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-block: 1px solid var(--line);
}

.signal-strip div {
  min-height: 112px;
  padding: 22px 28px;
  background: #fffdf9;
}

.signal-strip strong,
.signal-strip span {
  display: block;
}

.signal-strip strong {
  margin-bottom: 6px;
  color: var(--ink);
  font-size: 1.04rem;
  font-weight: 900;
}

.signal-strip span {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.55;
}

.section {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(72px, 10vw, 118px) 0;
}

.story-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(32px, 6vw, 76px);
  align-items: start;
}

.section-copy p,
.section-heading p,
.privacy-copy p,
.plus-copy p,
.final-cta p {
  color: var(--muted);
  font-size: 1.04rem;
}

.story-steps,
.feature-grid,
.screen-gallery {
  display: grid;
  gap: 18px;
}

.story-steps {
  grid-template-columns: 1fr;
}

.story-steps article,
.feature-grid article,
.screen-gallery figure {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 12px 34px rgba(72, 50, 64, 0.08);
}

.story-steps article {
  padding: 24px;
}

.story-steps span {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 16px;
  border-radius: 8px;
  color: #ffffff;
  background: var(--violet);
  font-weight: 900;
}

.story-steps article:nth-child(2) span {
  background: var(--mint);
}

.story-steps article:nth-child(3) span {
  background: var(--coral);
}

.story-steps p,
.feature-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.feature-section {
  width: 100%;
  max-width: none;
  padding-inline: max(20px, calc((100% - 1120px) / 2));
  background:
    linear-gradient(180deg, #fff8f3 0%, #ffffff 52%, #f3fbf8 100%);
}

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

.feature-grid article {
  padding: 24px;
}

.feature-grid article:nth-child(1) {
  border-top: 4px solid var(--coral);
}

.feature-grid article:nth-child(2) {
  border-top: 4px solid var(--violet);
}

.feature-grid article:nth-child(3) {
  border-top: 4px solid var(--sky);
}

.feature-grid article:nth-child(4) {
  border-top: 4px solid var(--lemon);
}

.feature-grid article:nth-child(5) {
  border-top: 4px solid var(--mint);
}

.feature-grid article:nth-child(6) {
  border-top: 4px solid var(--coral-dark);
}

.persona-section {
  width: 100%;
  max-width: none;
  padding-inline: max(20px, calc((100% - 1180px) / 2));
  overflow: visible;
  background:
    linear-gradient(180deg, #ffffff 0%, #fffdf9 46%, #f3fbf8 100%);
  border-block: 1px solid var(--line);
}

.sample-scroll-stage {
  --sample-card-width: min(900px, calc(100vw - 56px));
  position: relative;
  min-height: var(--sample-stage-height, 240vh);
}

.sample-sticky {
  position: sticky;
  top: 88px;
  overflow: hidden;
  height: min(600px, calc(100svh - 104px));
  padding: 10px 0 16px;
}

.sample-viewport {
  overflow: hidden;
  width: 100%;
  padding: 4px 0 20px;
}

.sample-track {
  display: flex;
  align-items: stretch;
  gap: 26px;
  width: max-content;
  padding-inline: max(0px, calc((min(1180px, 100vw - 40px) - var(--sample-card-width)) / 2));
  will-change: transform;
}

.sample-card {
  --slide-opacity: 0.58;
  --slide-scale: 0.9;
  position: relative;
  display: grid;
  grid-template-columns: minmax(210px, 250px) minmax(0, 1fr);
  gap: clamp(18px, 2.4vw, 28px);
  flex: 0 0 var(--sample-card-width);
  min-width: var(--sample-card-width);
  height: min(500px, calc(100svh - 150px));
  min-height: 470px;
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(255, 250, 246, 0.94) 46%, rgba(243, 251, 248, 0.88));
  box-shadow: 0 18px 46px rgba(72, 50, 64, 0.12);
  opacity: var(--slide-opacity);
  transform: scale(var(--slide-scale));
  transform-origin: center;
  transition:
    box-shadow 0.18s ease,
    opacity 0.18s ease,
    transform 0.18s ease;
}

.sample-card.is-active {
  opacity: 1;
  box-shadow: 0 34px 74px rgba(72, 50, 64, 0.2);
}

.sample-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  border-radius: 8px 8px 0 0;
  background: linear-gradient(90deg, var(--coral), var(--sky), var(--mint));
  content: "";
}

.sample-persona {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  min-height: 100%;
  padding-right: clamp(14px, 2vw, 22px);
  border-right: 1px solid rgba(44, 35, 41, 0.12);
}

.sample-avatar {
  width: min(156px, 100%);
  aspect-ratio: 1;
  margin-bottom: 18px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.92), rgba(255, 240, 245, 0.7) 44%, rgba(243, 251, 248, 0.88));
  box-shadow: inset 0 0 0 1px rgba(44, 35, 41, 0.08), 0 18px 36px rgba(72, 50, 64, 0.14);
}

.sample-avatar img {
  width: 100%;
  filter: drop-shadow(0 14px 20px rgba(72, 50, 64, 0.16));
}

.sample-meta {
  margin-bottom: 8px;
  color: var(--coral-dark);
  font-size: 0.9rem;
  font-weight: 900;
}

.sample-persona h3 {
  max-width: 12em;
  margin-bottom: 0;
  font-size: clamp(1.26rem, 2vw, 1.58rem);
  line-height: 1.35;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

.sample-comparison {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: 14px;
  align-content: stretch;
}

.sample-block {
  padding: clamp(14px, 1.8vw, 18px);
  border-left: 4px solid transparent;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.74);
}

.diary-block {
  grid-column: 1 / -1;
  border-color: var(--coral);
  background: rgba(255, 248, 243, 0.78);
}

.story-block {
  border-color: var(--sky);
  background: rgba(241, 250, 255, 0.76);
}

.suggestion-block {
  border-color: var(--mint);
  background: rgba(243, 251, 248, 0.84);
}

.sample-step {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  margin-bottom: 10px;
  padding: 2px 9px;
  border: 1px solid rgba(44, 35, 41, 0.1);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.66);
  font-size: 0.75rem;
  font-weight: 900;
}

.sample-block blockquote {
  margin: 0;
}

.sample-block p {
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 0.91rem;
  line-height: 1.62;
}

.sample-block p:last-child {
  margin-bottom: 0;
}

.sample-block ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.sample-block li {
  position: relative;
  padding-left: 22px;
  color: var(--ink);
  font-weight: 900;
  font-size: 0.9rem;
  line-height: 1.58;
}

.sample-block li::before {
  position: absolute;
  top: 0;
  left: 0;
  color: var(--mint);
  content: "✓";
}

.sample-progress {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: -4px;
}

.sample-progress span {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(44, 35, 41, 0.18);
  transition:
    width 0.18s ease,
    background 0.18s ease;
}

.sample-progress span.is-active {
  width: 26px;
  background: var(--coral);
}

.privacy-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 360px);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding: 14px 16px 14px 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.76);
  color: var(--ink);
  font-weight: 800;
}

.check-list li::before {
  position: absolute;
  left: 16px;
  top: 14px;
  color: var(--mint);
  content: "✓";
}

.privacy-art {
  justify-self: center;
  width: min(330px, 100%);
}

.screens-section {
  width: 100%;
  max-width: none;
  padding-inline: max(20px, calc((100% - 1180px) / 2));
  background: #fffdf9;
  border-block: 1px solid var(--line);
}

.screen-gallery {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-items: start;
}

.screen-gallery figure {
  margin: 0;
  padding: 12px;
}

.screen-gallery img {
  width: 100%;
  border-radius: 8px;
}

.screen-gallery figcaption {
  padding: 12px 4px 4px;
  color: var(--ink);
  font-size: 0.96rem;
  font-weight: 900;
  text-align: center;
}

.plus-section {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
}

.plus-art img {
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.final-cta {
  width: 100%;
  max-width: none;
  min-height: 420px;
  display: grid;
  place-items: center;
  padding-inline: 20px;
  color: #ffffff;
  background-image:
    linear-gradient(90deg, rgba(44, 35, 41, 0.78), rgba(44, 35, 41, 0.36)),
    var(--final-image);
  background-position: center;
  background-size: cover;
}

.final-cta div {
  width: min(900px, 100%);
}

.final-cta h2,
.final-cta p {
  max-width: 720px;
  color: #ffffff;
}

.site-footer {
  display: grid;
  justify-items: center;
  gap: 12px;
  padding: 44px 20px 54px;
  text-align: center;
  background: #fff8f3;
}

.site-footer img {
  width: 156px;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-weight: 800;
}

.legal-copy {
  max-width: 780px;
  font-size: 0.78rem;
  line-height: 1.7;
}

@media (max-width: 980px) {
  .header-actions {
    gap: 16px;
  }

  .hero {
    min-height: 780px;
  }

  .hero-inner {
    min-height: 780px;
  }

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

  .hero-visual {
    right: 4vw;
    bottom: -126px;
    width: min(300px, 42vw);
  }

  .navigator {
    left: -54px;
    width: 112px;
  }

  .signal-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .story-section,
  .privacy-band,
  .plus-section {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .screen-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sample-scroll-stage {
    --sample-card-width: min(820px, calc(100vw - 44px));
  }

  .sample-card {
    grid-template-columns: minmax(150px, 180px) minmax(0, 1fr);
    min-height: 540px;
    padding: 22px;
  }

  .sample-avatar {
    width: 116px;
  }

  .sample-persona h3 {
    font-size: 1.18rem;
  }

  .sample-comparison {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .sample-block {
    padding: 13px 15px;
  }

  .sample-block p,
  .sample-block li {
    font-size: 0.86rem;
    line-height: 1.55;
  }
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    min-height: 98px;
  }

  .brand {
    width: 150px;
  }

  .header-actions {
    width: 100%;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 10px 14px;
  }

  .nav-links {
    width: auto;
    flex: 1 1 auto;
    justify-content: space-between;
    gap: 10px;
    font-size: 0.86rem;
  }

  .hero {
    min-height: 640px;
  }

  .hero-inner {
    width: min(100% - 32px, 520px);
    min-height: 640px;
    padding-top: 42px;
  }

  .hero-copy {
    max-width: 100%;
  }

  h1 {
    font-size: clamp(2.45rem, 11vw, 3.35rem);
  }

  .hero-visual {
    display: none;
  }

  .signal-strip,
  .feature-grid,
  .screen-gallery {
    grid-template-columns: 1fr;
  }

  .signal-strip div {
    min-height: auto;
    padding: 20px;
  }

  .section {
    width: min(100% - 32px, 520px);
    padding: 68px 0;
  }

  .feature-section,
  .persona-section,
  .screens-section {
    width: 100%;
    padding-inline: 16px;
  }

  .sample-scroll-stage {
    min-height: auto !important;
  }

  .sample-sticky {
    position: static;
    overflow: visible;
    height: auto;
    min-height: auto;
    padding-bottom: 0;
  }

  .sample-viewport {
    overflow: visible;
    padding-bottom: 0;
  }

  .sample-track {
    display: grid;
    gap: 16px;
    width: 100%;
    padding: 0;
    transform: none !important;
  }

  .sample-card {
    grid-template-columns: 1fr;
    min-width: 0;
    height: auto;
    min-height: auto;
    width: 100%;
    padding: 18px;
    opacity: 1 !important;
    transform: none !important;
  }

  .sample-persona {
    display: grid;
    grid-template-columns: 78px minmax(0, 1fr);
    gap: 6px 14px;
    min-height: auto;
    padding: 0 0 16px;
    border-right: 0;
    border-bottom: 1px solid rgba(44, 35, 41, 0.12);
  }

  .sample-avatar {
    grid-row: 1 / 4;
    width: 78px;
    margin-bottom: 0;
  }

  .sample-meta {
    margin-bottom: 0;
    font-size: 0.82rem;
  }

  .sample-persona h3 {
    max-width: none;
    margin-bottom: 0;
    font-size: 1.2rem;
  }

  .sample-comparison {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .sample-block {
    padding: 14px;
  }

  .sample-progress {
    display: none;
  }

  .final-cta {
    width: 100%;
    min-height: 420px;
    padding: 68px 20px;
  }

  .final-cta div {
    width: 100%;
  }

  .final-cta h2 {
    font-size: 2rem;
  }

  .screen-gallery {
    max-width: 330px;
    margin-inline: auto;
  }

  .privacy-art {
    width: min(260px, 78vw);
  }
}