@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;600&display=swap');

body {
  font-family: 'Noto Sans JP', sans-serif;
  margin: 0;
  color: #333;
  background-image: url(bg2.jpeg);
  background-size: cover;
}

.header {
  text-align: center;
  padding: 50px 20px 30px;
}

.header h1 {
  font-size: 32px;
  margin-bottom: 10px;
}
h1 {
  position: relative;
  padding: 1rem .5rem;
  width: fit-content;
  margin: 0 auto;
}

h1:before,
h1:after {
  position: absolute;
  left: 0;
  width: 100%;
  height: 4px;
  content: '';
  background-image: -webkit-gradient(linear, right top, left top, from(#30cfd0), to(#330867));
  background-image: -webkit-linear-gradient(right, #30cfd0 0%, #330867 100%);
  background-image: linear-gradient(to left, #30cfd0 0%, #330867 100%);
}

h1:before {
  top: 0;
}

h1:after {
  bottom: 0;
}
.header p {
  color: #666;
}

.grid {
  max-width: 1100px;
  margin: 0 auto 70px;
  padding: 0 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
}

/* カード */
.card {
  position: relative;
  padding: 36px 20px;
  text-align: center;
  text-decoration: none;
  font-weight: 600;
  color: #444;

  background: #fff;
  border-radius: 18px;

  box-shadow: 0 10px 24px rgba(0,0,0,0.08);
  transition: transform .3s ease, box-shadow .3s ease;
  overflow: hidden;
}

/* グラデーション枠 */
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 18px;
  padding: 2px;
  background: linear-gradient(135deg, #6a85f1, #a777e3, #ffb7c5);
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

/* 光が走る演出 */
.card::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    120deg,
    transparent 30%,
    rgba(219, 219, 219, 0.6) 50%,
    transparent 70%
  );
  transform: translateX(-100%);
  transition: transform 1s ease;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 18px 36px rgba(0,0,0,0.15);
}

.card:hover::after {
  transform: translateX(100%);
}