@font-face {
  font-family: "Keifont";
  src: url("font/k-font/keifont.ttf") format("truetype");
  font-display: swap;
}

:root {
  --sky: #9ed6f0;
  --navy: #1f3242;
  --muted: #597991;
  --menu: #2b2c34;
  --shadow: 0 8px 18px rgba(22, 74, 105, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Keifont", "M PLUS Rounded 1c", "Hiragino Sans", "Meiryo", sans-serif;
  color: var(--navy);
  background: #ffffff;
}

header.hero {
  background: #ffffff;
  padding: 18px 18px 22px;
  box-shadow: var(--shadow);
}

.hero__inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #128ac8;
  font-size: 24px;
  text-decoration: none;
}

.logo__img {
  height: 24px;
  width: auto;
  display: block;
}

.menu {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  color: var(--menu);
  font-size: 15px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.menu__icon {
  display: grid;
  gap: 4px;
}

.menu__icon span {
  width: 26px;
  height: 3px;
  border-radius: 8px;
  background: var(--menu);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.04);
}

/* ヒーローセクション */
.hero-section {
  background: var(--sky);
  padding: 36px 18px 0;
  overflow: visible;
}

.hero-section__inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
}

.hero-visual {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  position: relative;
  transform: translateY(0%);
  margin-bottom: -35%;
}

.hero-visual img {
  width: 100%;
  max-width: 1100px;
  height: auto;
  display: block;
  border-radius: 16px;
}

.hero-cta {
  position: absolute;
  left: 50%;
  bottom: -1%;
  transform: translateX(-50%);
  width: 100%;
  filter: drop-shadow(0 12px 26px rgba(0, 0, 0, 0.18));
}

.hero-cta img {
  width: 100%;
  height: auto;
  display: block;
}

/* LINE招待セクション */
.line-invite {
  background: #ffffff;
  padding: 350px 18px 24px;
}

.line-invite__inner {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
}

.line-invite__text {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
  color: var(--navy);
}

.line-invite__text .line-green {
  color: #39b54a;
}

.line-invite__img {
  display: flex;
  justify-content: center;
  width: 100%;
}

.line-invite__img img {
  width: 80%;
  height: auto;
  display: block;
}

.line-invite__kanri {
  display: flex;
  justify-content: center;
  width: 100%;
}

.line-invite__kanri img {
  width: 100%;
  height: auto;
  display: block;
}

.footer {
  background: #ffffff;
  padding: 40px 18px 60px;
  text-align: center;
}

.footer__sns {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.footer__icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: #e7ecf2;
  border: 1px solid #d3d9e0;
  display: grid;
  place-items: center;
}

.footer__icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 12px;
}

.footer__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
}

.footer__links {
  margin: 0;
  color: var(--navy);
  font-size: 14px;
  font-family: "Hiragino Sans", "Meiryo", sans-serif;
}

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

.footer__links a:hover {
  text-decoration: underline;
}

@media (max-width: 720px) {
  .hero-cta {
    width: min(90%, 420px);
    bottom: 0%;
  }

  .line-invite {
    padding: 126px 0 18px;
  }

  .line-invite__text {
    font-size: 17px;
  }

  .footer {
    padding: 32px 14px 48px;
  }

  .footer__icon {
    width: 58px;
    height: 58px;
  }

  .footer__title {
    font-size: 17px;
  }

  .footer__links {
    font-size: 15px;
  }
}