:root {
  --blue-1: #dff6ff;
  --blue-2: #ffffff;
  --blue-3: #00aaff;
  --blue-4: #40cfff;
  --blue-5: #0077aa;
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  font-family: "Helvetica Neue", Arial, sans-serif;
  line-height: 1.8;
  margin: 0;
  color: #333;
  background: linear-gradient(135deg, var(--blue-1), var(--blue-2));
  overflow-x: hidden;
}

/* 背景ウォーターマーク */
.bg-mark {
  position: fixed;
  inset: 0;
  background-image: url("app-icon.png");
  background-repeat: no-repeat;
  background-position: right -120px bottom -80px;
  background-size: min(50vmax, 720px);
  opacity: 0.06;
  pointer-events: none;
  filter: saturate(1.1);
  z-index: 0;
}

/* ヘッダー */
.site-header {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: center;
  padding: 28px 16px;
  text-align: center;
  background: linear-gradient(135deg, var(--blue-3), var(--blue-4));
  color: #fff;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.app-logo {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.25);
  object-fit: cover;
}

.head-text h1 {
  margin: 0;
  font-size: clamp(1.8rem, 1.2rem + 2vw, 2.6rem);
  letter-spacing: 1.5px;
}
.head-text p {
  margin: 4px 0 0;
  font-size: 1.05rem;
  opacity: 0.95;
}

/* メイン */
main {
  max-width: 900px;
  margin: 42px auto;
  padding: 0 20px;
}

/* カード */
.card {
  background: #fff;
  border-radius: 14px;
  padding: 28px;
  margin-bottom: 28px;
  border-left: 6px solid var(--blue-3);
  box-shadow: 0 6px 18px rgba(0,160,230,0.18);
  transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 26px rgba(0,160,230,0.32);
}

h2 {
  color: var(--blue-5);
  margin: 0 0 16px;
}

/* ボタン */
.button {
  display: inline-block;
  padding: 12px 22px;
  background: linear-gradient(135deg, var(--blue-3), var(--blue-4));
  color: #fff;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  box-shadow: 0 6px 16px rgba(0,0,0,0.18);
  transition: transform .15s ease, filter .2s ease;
}
.button:hover {
  transform: translateY(-1px) scale(1.02);
  filter: brightness(1.05);
}

/* フッター */
footer {
  text-align: center;
  font-size: 0.9em;
  color: #555;
  padding: 24px 12px 36px;
  margin-top: 54px;
}

/* カエル */
.frog-talk {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}
.frog-talk .frog {
  width: 160px;
  height: auto;
}
.frog-talk .bubble {
  position: relative;
  background: #e6f7ff;
  border: 2px solid #00aaff;
  border-radius: 16px;
  padding: 16px 20px;
  max-width: 70%;
  color: #333;
}
.frog-talk .bubble::before {
  content: "";
  position: absolute;
  left: -16px;
  top: 20px;
  border: 8px solid transparent;
  border-right-color: #00aaff;
}
.frog-talk .bubble::after {
  content: "";
  position: absolute;
  left: -12px;
  top: 20px;
  border: 8px solid transparent;
  border-right-color: #e6f7ff;
}

/* サポート */
.support-center {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.support-text {
  flex: 1;
}
.support-image {
  position: relative;
  max-width: 220px;
}
.protected-img {
  display: block;
  width: 100%;
  border-radius: 12px;
  filter: drop-shadow(0 6px 12px rgba(0,0,0,0.15));
  pointer-events: none;
}
.img-cover {
  position: absolute;
  inset: 0;
  background: transparent;
}
.support-image:hover {
  transform: scale(1.05) rotate(-1deg);
  transition: transform 0.25s ease;
}

/* ストアリンク */
.store-links {
  text-align: center;
  padding: 20px 0;
}
.badges {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.store-badge {
  width: 180px;
  max-width: 45%;
  transition: transform 0.2s ease;
}
.store-badge:hover {
  transform: scale(1.05);
}

/* レスポンシブ */
@media (max-width: 768px) {
  .support-center {
    flex-direction: column;
    text-align: center;
  }
  .support-image {
    max-width: 160px;
    margin-top: 16px;
  }
}
/* ===== Store strip (gungho-ish) ===== */
.store-strip {
  position: relative;
  background: #0b0d14;            /* 黒に近い濃紺 */
  padding: 28px 0 36px;
  margin-top: 42px;
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08); /* 上に細い線：見切り */
  border-top: 3px solid #0aa4ff;  /* もっと“線感”が欲しければここを太く */
}

.store-strip__inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

.store-strip__title {
  margin: 0 0 18px;
  text-align: center;
  font-size: clamp(20px, 2.4vw, 32px);
  color: #1282bd;                  /* タイトルは青系で */
  letter-spacing: 1px;
}

/* バッジ2つを中央に大きめで */
.store-strip__badges {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(16px, 4vw, 36px);
  flex-wrap: wrap;
}

/* バッジのサイズ感：PCでデカめ・スマホでは絞る */
.store-strip__badge {
  display: block;
  width: clamp(180px, 22vw, 320px);   /* ここで“デカさ”を調整。最大320px */
  height: auto;
  filter: drop-shadow(0 6px 16px rgba(0,0,0,.45));
  transition: transform .18s ease, filter .18s ease;
}

.store-strip__badge:hover {
  transform: translateY(-2px) scale(1.03);
  filter: drop-shadow(0 10px 22px rgba(0,0,0,.6));
}

@media (max-width: 560px) {
  .store-strip { padding: 22px 0 28px; }
  .store-strip__title { margin-bottom: 12px; }
}