:root{
  --paper: #F3F6FB;
  --paper-deep: #E7EEF8;
  --ink: #1F2B3D;
  --ink-soft: #5C6B80;
  --green: #007AFF;
  --green-deep: #0040DD;
  --check: #34C759;
  --yellow: #F4C95D;
  --line: #D6E0EE;
  --white: #FFFFFF;
  --radius: 18px;
  --shadow: 0 18px 40px -22px rgba(31, 43, 61, 0.35);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:'Inter', sans-serif;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,.display{
  font-family:'Fredoka', sans-serif;
  font-weight:600;
  letter-spacing:-0.01em;
}
a{color:inherit;}
img{max-width:100%;display:block;}

/* paper grain texture */
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  opacity:0.5;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(46,43,38,0.035) 1px, transparent 0);
  background-size:14px 14px;
  z-index:0;
}

.wrap{
  max-width:1080px;
  margin:0 auto;
  padding:0 28px;
  position:relative;
  z-index:1;
}

/* ---------- Language switching ---------- */
html[lang="ja"] .en { display: none !important; }
html[lang="en"] .ja { display: none !important; }

/* ---------- Lang switcher ---------- */
.lang-switcher{
  display:flex;
  align-items:center;
  gap:4px;
  background:var(--paper-deep);
  border-radius:999px;
  padding:4px;
}
.lang-btn{
  font-size:13px;
  font-weight:600;
  padding:6px 14px;
  border-radius:999px;
  border:none;
  cursor:pointer;
  background:transparent;
  color:var(--ink-soft);
  transition:background .15s ease, color .15s ease;
  font-family:'Inter', sans-serif;
}
.lang-btn.active{
  background:var(--ink);
  color:var(--white);
}

/* ---------- Nav ---------- */
nav.wrap{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-top:28px;
  padding-bottom:28px;
  gap:16px;
}
.nav-right{
  display:flex;
  align-items:center;
  gap:12px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:'Fredoka', sans-serif;
  font-weight:600;
  font-size:18px;
}
.brand .mark{
  width:34px;height:34px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
  flex:none;
}
.brand .mark img{width:100%;height:100%;object-fit:cover;}
nav a.cta-small{
  font-size:14px;
  font-weight:600;
  padding:9px 18px;
  border-radius:999px;
  border:1.5px solid var(--ink);
  white-space:nowrap;
  transition:transform .15s ease, background .15s ease, color .15s ease;
}
nav a.cta-small:hover{background:var(--ink); color:var(--paper); transform:translateY(-1px);}

/* ---------- Hero ---------- */
.hero{
  padding:36px 0 70px;
  display:flex;
  flex-direction:column;
  align-items:center;
  text-align:center;
  gap:38px;
}
.hero-copy{
  max-width:620px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--green-deep);
  background:rgba(76,140,92,0.12);
  padding:6px 14px;
  border-radius:999px;
  margin-bottom:20px;
}
.eyebrow span.dot{width:6px;height:6px;border-radius:50%;background:var(--green);}
.hero h1{
  font-size:clamp(34px, 4.6vw, 52px);
  line-height:1.15;
  margin:0 0 20px;
}
.hero h1 .underline{
  position:relative;
  white-space:nowrap;
}
.hero h1 .underline svg{
  position:absolute;
  left:0; bottom:-6px;
  width:100%;
  height:14px;
}
.hero p.lead{
  font-size:18px;
  line-height:1.75;
  color:var(--ink-soft);
  max-width:46ch;
  margin:0 auto;
}
.badges{
  display:flex;
  align-items:center;
  gap:16px;
  flex-wrap:wrap;
}
.appstore-badge{
  display:inline-flex;
  align-items:center;
  gap:10px;
  background:var(--ink);
  color:var(--paper);
  padding:12px 22px;
  border-radius:14px;
  font-weight:600;
  font-size:15px;
  box-shadow:var(--shadow);
  transition:transform .18s ease;
}
.appstore-badge:hover{transform:translateY(-2px);}
.appstore-badge svg{width:22px;height:22px;flex:none;}
.free-tag{
  font-size:13px;
  color:var(--ink-soft);
}
.meta-row{
  margin-top:30px;
  display:flex;
  gap:22px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--ink-soft);
}
.meta-row .item{display:flex; align-items:center; gap:6px;}
.meta-row svg{width:15px;height:15px; opacity:.7;}

/* ---------- Hero visual ---------- */
.hero-visual{
  display:flex;
  flex-direction:column;
  align-items:center;
}
.phone{
  width:280px;
  background:var(--ink);
  border-radius:46px;
  padding:14px;
  box-shadow:var(--shadow);
}
.phone .screen{
  background:var(--white);
  border-radius:34px;
  overflow:hidden;
  position:relative;
}
.phone .notch{
  position:absolute;
  top:0; left:50%;
  transform:translateX(-50%);
  width:120px; height:26px;
  background:var(--ink);
  border-radius:0 0 16px 16px;
  z-index:2;
}
.phone .statusbar{
  height:46px;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  padding:0 22px 6px;
  font-size:12px;
  font-weight:600;
  color:var(--ink);
}
.phone .statusbar .icons{display:flex; align-items:center; gap:4px;}
.phone .navbar{
  padding:2px 18px 14px;
}
.phone .navbar h3{
  margin:0;
  font-size:23px;
  color:var(--ink);
}
.phone .list{
  background:var(--paper);
  margin:0 12px 16px;
  border-radius:16px;
  overflow:hidden;
}
.check-item{
  display:flex;
  align-items:center;
  gap:12px;
  padding:13px 16px;
  background:var(--white);
  border-bottom:1px solid var(--line);
  cursor:pointer;
  user-select:none;
}
.check-item:last-child{border-bottom:none;}
.box{
  width:22px;height:22px;
  border-radius:50%;
  border:2px solid #C7D2E2;
  flex:none;
  display:flex;align-items:center;justify-content:center;
  transition:background .15s ease, border-color .15s ease;
}
.box svg{width:12px;height:12px; opacity:0; transition:opacity .15s ease;}
.check-item.done .box{background:var(--check); border-color:var(--check);}
.check-item.done .box svg{opacity:1;}
.check-item.done .label{color:var(--ink-soft); text-decoration:line-through;}
.label{font-size:15px; font-weight:500; transition:color .15s ease;}
.phone .addrow{
  display:flex;
  align-items:center;
  gap:10px;
  margin:0 28px 26px;
  color:var(--green);
  font-size:14px;
  font-weight:600;
}
.phone .addrow .plus{
  width:22px;height:22px;
  border-radius:50%;
  border:2px solid var(--green);
  display:flex;align-items:center;justify-content:center;
  font-size:14px;
  flex:none;
}
.hint{
  margin-top:18px;
  font-size:12px;
  color:var(--ink-soft);
  text-align:center;
}

/* ---------- Features ---------- */
.section-head{
  text-align:center;
  max-width:560px;
  margin:0 auto 50px;
}
.section-head .eyebrow{margin-bottom:14px;}
.section-head h2{font-size:clamp(26px,3.2vw,34px); margin:0 0 14px;}
.section-head p{color:var(--ink-soft); font-size:16px; line-height:1.7; margin:0;}

.features{
  padding:70px 0;
}
.grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:22px;
}
.card{
  background:var(--white);
  border-radius:var(--radius);
  padding:28px 24px;
  border:1px solid var(--line);
}
.card .icon{
  width:44px;height:44px;
  border-radius:12px;
  background:var(--paper-deep);
  display:flex;align-items:center;justify-content:center;
  margin-bottom:18px;
}
.card .icon svg{width:22px;height:22px; color:var(--green-deep);}
.card h3{font-size:17px; margin:0 0 8px;}
.card p{font-size:14.5px; line-height:1.7; color:var(--ink-soft); margin:0;}

/* ---------- How it works ---------- */
.how{
  padding:70px 0;
  background:var(--paper-deep);
  border-radius:32px;
  margin:0 28px;
}
.how .wrap{padding:60px 28px;}
.steps{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:24px;
  margin-top:10px;
}
.step{position:relative; padding-left:2px;}
.step .num{
  font-family:'Fredoka', sans-serif;
  font-size:34px;
  font-weight:600;
  color:var(--green);
  opacity:.55;
  line-height:1;
  margin-bottom:10px;
}
.step h4{font-size:15.5px; margin:0 0 6px;}
.step p{font-size:13.5px; color:var(--ink-soft); line-height:1.6; margin:0;}

/* ---------- Theme strip ---------- */
.themes{
  padding:70px 0;
  text-align:center;
}
.swatches{
  display:flex;
  justify-content:center;
  gap:14px;
  margin-top:32px;
  flex-wrap:wrap;
}
.swatch{
  width:46px;height:46px;
  border-radius:50%;
  border:3px solid var(--white);
  box-shadow:0 4px 14px -4px rgba(0,0,0,0.25);
}

/* ---------- Final CTA ---------- */
.final-cta{
  padding:30px 0 100px;
  text-align:center;
}
.final-cta h2{font-size:clamp(26px,3.4vw,36px); margin:0 0 16px;}
.final-cta p{color:var(--ink-soft); margin:0 0 30px; font-size:16px;}

/* ---------- Footer ---------- */
footer{
  padding:34px 0 50px;
  border-top:1px solid var(--line);
}
footer .wrap{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:14px;
  font-size:13px;
  color:var(--ink-soft);
}
footer a{text-decoration:none; color:var(--ink-soft);}
footer a:hover{color:var(--ink);}
footer .links{display:flex; gap:20px; flex-wrap:wrap;}

/* ---------- Responsive ---------- */
@media (max-width: 860px){
  .grid{grid-template-columns:1fr 1fr;}
  .steps{grid-template-columns:1fr 1fr;}
  .how{margin:0 16px;}
}
@media (max-width: 540px){
  .grid{grid-template-columns:1fr;}
  .steps{grid-template-columns:1fr;}
  .phone{width:100%; max-width:300px;}
  .nav-right{gap:8px;}
  nav a.cta-small{padding:8px 14px; font-size:13px;}
}

/* ---------- Privacy Policy ---------- */
.policy-hero {
  padding: 48px 0 32px;
  text-align: center;
}
.policy-hero h1 {
  font-size: clamp(26px, 3.2vw, 36px);
  margin: 0 0 12px;
}
.policy-hero .updated {
  font-size: 13px;
  color: var(--ink-soft);
}
.lang-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 24px 0 40px;
}
.lang-tab {
  padding: 8px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1.5px solid var(--line);
  background: var(--white);
  color: var(--ink-soft);
  transition: all .15s ease;
}
.lang-tab.active {
  background: var(--ink);
  color: var(--white);
  border-color: var(--ink);
}
.policy-content {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 28px 80px;
}
.policy-section { display: none; }
.policy-section.active { display: block; }
.policy-content h2 {
  font-size: 22px;
  margin: 40px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.policy-content h3 {
  font-size: 16px;
  margin: 24px 0 8px;
  color: var(--ink);
}
.policy-content p, .policy-content li {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  margin: 0 0 8px;
}
.policy-content ul {
  padding-left: 20px;
  margin: 8px 0 16px;
}
.policy-content a {
  color: var(--green);
  text-decoration: none;
}
.policy-content a:hover { text-decoration: underline; }
.important-note {
  background: var(--paper-deep);
  border-left: 3px solid var(--green);
  padding: 12px 16px;
  border-radius: 0 8px 8px 0;
  margin: 16px 0;
  font-size: 14px;
  color: var(--ink);
  font-weight: 500;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-soft);
  text-decoration: none;
  margin-bottom: 8px;
}
.back-link:hover { color: var(--ink); }