/* ===== Base ===== */
:root{
  --green:#8AC75A;
  --green-darker:#77B44C;
  --text:#333;
  --bg:#f0f2f5;
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  margin:0; color:var(--text); background:var(--bg);
}
.container{ width:min(1200px,92%); margin-inline:auto; }

/* ===== Hero（成功例に合わせる） ===== */
.hero{ position:relative; overflow:hidden; background:#1F73FF !important; color:#fff; }
.hero-background{
  position:absolute; inset:0;
  background:
    linear-gradient(180deg, rgba(255,255,255,.12) 0%, rgba(255,255,255,0) 40%),
    repeating-linear-gradient(90deg, rgba(255,255,255,.08) 0 2px, rgba(255,255,255,0) 2px 80px),
    linear-gradient(180deg, #2A86FF 0%, #135ED6 100%);
  pointer-events:none;
}
.hero .hero-content{
  position:relative;
  display:flex; flex-direction:column; align-items:center; text-align:center;
  padding:72px 0 56px;
}
.hero-logo{
  width:clamp(220px, 28vw, 400px); /* 最小/可変/最大をUP */
  max-width:140%;                   /* 極端に狭い画面のはみ出し防止 */
  height:auto;
  display:block;
  margin-bottom:20px;
}
.hero-title{ font-size:clamp(28px,5vw,48px); line-height:1.2; margin:8px 0 12px; color:#fff !important; }
.hero-title .highlight{ color:#36C26E !important; background:none !important; padding:0; }
.hero-subtitle{ font-size:clamp(16px,2.4vw,18px); line-height:1.7; color:#E9F2FF !important; margin:0 0 8px; }

/* スクロール矢印 */
.scroll-indicator{ margin-top:16px; }
.scroll-indicator i{ color:#DCEBFF !important; opacity:.9; font-size:20px; }

/* ===== ダウンロードボタン（緑固定＋縦ズレ解消） ===== */
.download-buttons{ display:flex; justify-content:center; margin-top:20px; }
.download-buttons.small{ margin-top:12px; }

.download-btn{
  display:flex; align-items:center; gap:12px;
  padding:12px 20px; border-radius:12px;
  text-decoration:none; color:#fff;
  background:#8AC75A; border:1px solid rgba(0,0,0,.05);
}
.download-btn .fab.fa-android{ font-size:28px; line-height:1; flex:0 0 auto; }
.download-btn .btn-text{ display:flex; flex-direction:column; line-height:1.15; }
.download-btn .btn-text small{ font-weight:600; margin-bottom:2px; opacity:.95; }
.download-btn .btn-text strong{ font-weight:700; }

/* 強制上書き：青系グラデなどを無効化 */
.download-btn.android-download{
  background-color:#8AC75A !important;
  background-image:none !important;
  color:#fff !important;
  border:1px solid rgba(0,0,0,.05) !important;
}
.download-btn.android-download:hover,
.download-btn.android-download:focus{
  background-color:#77B44C !important;
}
.download-btn.small{ padding:10px 16px; }
.download-btn.small .fab.fa-android{ font-size:22px; }

/* ===== 共通セクション ===== */
.section-title{
  font-size:clamp(22px,3.4vw,32px);
  text-align:center; margin:40px 0 20px;
}

.about .about-content{ display:grid; gap:16px; justify-items:center; text-align:center; }
.features{
  display:grid; gap:18px; grid-template-columns:repeat(auto-fit, minmax(220px, 1fr));
  margin-top:20px;
}
.feature-item{
  background:#fff; border-radius:14px; padding:18px;
  box-shadow:0 4px 12px rgba(0,0,0,.05);
}
.feature-icon{ font-size:28px; color:var(--green); margin-bottom:8px; }

/* How-To */
.steps{ display:grid; gap:18px; grid-template-columns:1fr; }
.step{
  background:#fff; border-radius:14px; padding:18px;
  box-shadow:0 4px 12px rgba(0,0,0,.05);
}
.step-number{
  width:36px; height:36px; border-radius:50%;
  background:var(--green); color:#fff;
  display:inline-flex; align-items:center; justify-content:center;
  font-weight:700; margin-bottom:8px;
}

/* CTA */
.cta{ background:#fff; padding:32px 0; margin-top:24px; }
.cta h2{ text-align:center; margin:0 0 6px; }
.cta p{ text-align:center; margin:0; color:#444; }

/* Footer */
.footer{ background:#0f172a; color:#fff; margin-top:40px; }
.footer .footer-content{ padding:24px 0; display:grid; gap:12px; justify-items:center; }
.footer a{ color:#d2e7c9; text-decoration:none; margin:0 6px; }
.footer a:hover{ text-decoration:underline; }

/* Responsive */
@media (min-width:720px){ .steps{ grid-template-columns:repeat(3,1fr); } }
@media (max-width:560px){ .scroll-indicator{ display:none; } }
@media (max-width:360px){ .download-btn .btn-text strong{ font-size:14px; } }