:root {
  --mint: #e0f2f1;        /* 薄いミントグリーン */
  --main-green: #80cbc4;  /* メインの緑 */
  --pastel-blue: #e3f2fd; /* 薄いパステルブルー */
  --main-blue: #90caf9;   /* メインの青 */
  --text-dark: #455a64;   /* 柔らかい濃いグレー */
  --white: #ffffff;
}

* { box-sizing: border-box; }

body {
  background-color: var(--white);
  color: var(--text-dark);
  font-family: 'Noto Sans JP', sans-serif;
  line-height: 1.8;
  letter-spacing: 0.05em;
  margin: 0;
  overflow-x: hidden;
}

/* Header */
header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(5px);
  padding: 15px 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  border-bottom: 2px solid var(--mint);
}

.logo {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--main-green);
  margin: 0;
}

/* Hamburger */
.hamburger {
  display: block;
  position: relative;
  width: 26px;
  height: 20px;
  cursor: pointer;
  z-index: 2000;
}

.hamburger span {
  display: block;
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: var(--main-green);
  transition: .3s;
  border-radius: 2px;
}

.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { top: 9px; }
.hamburger span:nth-child(3) { bottom: 0; }

.hamburger.active span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

/* Nav Menu */
.nav-menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100vh;
  background-color: rgba(224, 242, 241, 0.98); /* ミント系背景 */
  display: flex;
  align-items: center;
  justify-content: center;
  transition: .4s;
  z-index: 1500;
}

.nav-menu.active { right: 0; }

.nav-menu ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 30px;
  text-align: center;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-dark);
  font-size: 1.3rem;
  font-weight: 700;
}

/* Main Visual */
.main-visual {
  height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, var(--mint) 0%, var(--pastel-blue) 100%);
  padding: 0 20px;
}

.main-visual h2 {
  font-size: 2rem;
  color: var(--text-dark);
  margin-bottom: 20px;
  line-height: 1.4;
}

.main-visual p {
  background: white;
  display: inline-block;
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 0.9rem;
  color: var(--main-green);
  font-weight: bold;
}

/* Sections */
.section { padding: 80px 20px; max-width: 1000px; margin: 0 auto; }
.title-jp {
  font-size: 1.6rem;
  text-align: center;
  margin-bottom: 40px;
  color: var(--main-green);
  position: relative;
}

.title-jp::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--main-blue);
  margin: 10px auto 0;
  border-radius: 2px;
}

.center-text { text-align: center; font-size: 0.95rem; }
.center-content { text-align: center; margin-top: 30px; }

/* Merit Grid */
.merit-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.merit-item { 
  background: var(--mint); 
  padding: 30px; 
  border-radius: 15px;
  border: 1px solid white;
}

.merit-icon { 
  display: inline-block;
  background: var(--white);
  color: var(--main-green);
  padding: 2px 12px;
  border-radius: 10px;
  font-size: 0.8rem;
  font-weight: bold;
  margin-bottom: 15px;
}

.merit-item h3 { font-size: 1.1rem; margin-bottom: 10px; color: var(--text-dark); }
.merit-item p { font-size: 0.85rem; margin: 0; }

/* System Table */
.system-table { background: var(--pastel-blue); border-radius: 15px; padding: 10px 20px; }
.system-row { 
  display: flex; 
  justify-content: space-between; 
  padding: 20px 0; 
  border-bottom: 1px solid rgba(255,255,255,0.5);
}
.system-row:last-child { border-bottom: none; }
.system-row .label { font-weight: bold; color: var(--main-blue); }

/* Slider */
.gallery-container { overflow: hidden; width: 100%; padding: 30px 0; }
.gallery-track { display: flex; gap: 15px; animation: infinite-scroll 45s linear infinite; width: max-content; }
.gallery-track img { width: 180px; height: 250px; object-fit: cover; border-radius: 10px; }
@keyframes infinite-scroll { 0% { transform: translateX(0); } 100% { transform: translateX(calc(-180px * 6 - 15px * 6)); } }

/* Buttons */
.cta-button { 
  padding: 15px 40px; 
  text-decoration: none; 
  font-size: 1rem; 
  font-weight: bold;
  border-radius: 30px;
  display: inline-block;
  transition: .3s;
}

.main-cta {
  background: var(--main-green);
  color: white;
  box-shadow: 0 4px 15px rgba(128, 203, 196, 0.4);
}

.fixed-cta { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); width: 90%; max-width: 380px; z-index: 2000; }
.line-green { 
  background: #06c755; 
  color: #fff; 
  width: 100%; 
  text-align: center; 
  box-shadow: 0 5px 15px rgba(0,0,0,0.1); 
}

footer { text-align: center; padding: 30px; font-size: 0.75rem; color: #999; background: #f9f9f9; }