/* ===== BASE ===== */
body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  color: #fff;
  background: 
    radial-gradient(circle at 20% 20%, rgba(0,174,239,0.4), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(0,174,239,0.3), transparent 50%),
    linear-gradient(160deg, #0a0a0a, #050505);
}

h1, h2 {
  font-family: 'Space Grotesk', sans-serif;
  letter-spacing: 1px;
}

p {
  color: #aaa;
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(10,10,10,0.6);
  backdrop-filter: blur(10px);
  transition: 0.3s;
}

.header.scrolled {
  background: rgba(10,10,10,0.9);
}

.header-inner {
  max-width: 1200px;
  margin: auto;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  gap: 12px;
  align-items: center;
  text-decoration: none;
  color: inherit;
}

.logo:hover,
.logo:visited {
  color: inherit;
}

.logo img {
  width: 40px;
}

.logo-sub {
  font-size: 11px;
  color: #aaa;
}

.nav a {
  color: #ccc;
  margin-left: 24px;
  text-decoration: none;
}

.nav a:hover {
  color: #00AEEF;
}

/* ===== ハンバーガー基本 ===== */
#menu-toggle {
  display: none;
}

.menu-btn {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
}

.menu-btn span {
  width: 25px;
  height: 2px;
  background: #fff;
  display: block;
  transition: 0.3s;
}

/* ===== 変形 ===== */
#menu-toggle:checked + .menu-btn span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

#menu-toggle:checked + .menu-btn span:nth-child(2) {
  opacity: 0;
}

#menu-toggle:checked + .menu-btn span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}


/* ===== PC表示 ===== */
.nav {
  display: flex;
  gap: 24px;
}

/* ===== スマホ ===== */
@media (max-width: 768px) {

  .menu-btn {
    display: flex;
  }

  .nav {
    position: absolute;
    top: 70px;
    right: 0;
    width: 100%;
    background: #111;
    flex-direction: column;
    align-items: center;
    display: none;
    padding: 20px 0;
  }

  .nav a {
    padding: 12px 0;
    width: 100%;
    text-align: center;
  }

  /* チェックで表示 */
  #menu-toggle:checked + .menu-btn + .nav {
    display: flex;
  }
}

/* HERO */
.hero {
  height: 60vh;
  display:flex;
  flex-direction:column;
  justify-content:center;
  align-items:center;
}

/* ===== FADE ANIMATION ===== */
.fade {
  opacity: 0;
  transform: translateY(40px);
  transition: 1.2s;
}

.fade.show {
  opacity: 1;
  transform: translateY(0);
}

/* SECTION */
section {
  padding: 160px 20px;
  text-align: center;
}


/* ===== BUTTON ===== */
.btn {
  border: 1px solid #00AEEF;
  padding: 12px 28px;
  display: inline-block;
  margin-top: 20px;
  color: #00AEEF;
  text-decoration: none;
}

/* CTA */
.btn {
  border: 1px solid #00AEEF;
  padding: 12px 28px;
  display: inline-block;
  margin-top: 20px;
  color: #00AEEF;
  text-decoration: none;
}
.btn:hover {
  background: #00AEEF;
  color: #000;
}


/* ===== FOOTER ===== */
footer {
  text-align: center;
  padding: 60px;
  color: #777;
}