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

:root {
  --accent: #7fc8ff;
  --bg: radial-gradient(circle at 20% 20%, #1a1a40, #0a0a20 80%);
  --text: #e6ecff;
  --card-bg: rgba(255, 255, 255, 0.08);
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Noto Sans JP', system-ui, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.8;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

/* 星の演出 */
body::before {
  content: "";
  position: fixed; /* ← absolute から fixed に変更 */
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  background: transparent;
  background-image: radial-gradient(2px 2px at 20px 30px, white, transparent),
                    radial-gradient(2px 2px at 200px 100px, white, transparent),
                    radial-gradient(1.5px 1.5px at 400px 300px, #aaf, transparent),
                    radial-gradient(1px 1px at 600px 150px, #fff, transparent),
                    radial-gradient(1.5px 1.5px at 800px 400px, #ccf, transparent),
                    radial-gradient(1px 1px at 1200px 200px, #fff, transparent);
  background-repeat: repeat;
  background-size: 800px 600px;
  animation: twinkle 15s linear infinite;
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}

@keyframes twinkle {
  from { transform: translateY(0); }
  to { transform: translateY(-200px); }
}

/* コンテンツ全体を main に包んで伸縮制御 */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* ヘッダー */
header {
  text-align: center;
  padding: 1.5rem 0;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  z-index: 1;
}

header h1 {
  margin: 0;
  font-size: 1.8rem;
  font-weight: 600;
  color: #d0ddff;
}

/* ヒーロー */
#hero {
  text-align: center;
  padding: 3rem 1rem 2rem;
  position: relative;
  z-index: 1;
}

.avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  margin-bottom: 1rem;
  box-shadow: 0 0 12px rgba(120, 180, 255, 0.5);
}

#hero h2 {
  font-size: 1.3rem;
  margin: 0.6rem 0;
  color: #c8d6ff;
}

#hero p {
  color: #aab8ff;
  font-size: 1rem;
}

/* リンクカード */
#links {
  padding: 2.5rem 1rem 3rem;
  text-align: center;
  position: relative;
  z-index: 1;
}

#links h2 {
  margin-bottom: 1.5rem;
  color: #d9e6ff;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.link-card {
  display: flex;
  align-items: center;
  background: var(--card-bg);
  border-radius: 1rem;
  padding: 1rem 1.2rem;
  text-decoration: none;
  color: var(--text);
  box-shadow: 0 4px 12px rgba(0, 0, 40, 0.4);
  transition: transform 0.25s ease, background 0.3s ease;
}

.link-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.15);
}

/* ロゴの見やすさ向上 */
.link-card img {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  margin-right: 1rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.8);
  padding: 6px;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
  transition: box-shadow 0.3s ease, background 0.3s ease;
}

.link-card:hover img {
  background: rgba(255, 255, 255, 1);
  box-shadow: 0 0 12px rgba(180, 220, 255, 0.6);
}

.link-card .info {
  text-align: left;
}

.link-card h3 {
  margin: 0;
  font-size: 1.1rem;
  color: #dce3ff;
}

.link-card .id {
  color: #b8c4ff;
  font-size: 0.9rem;
  margin: 0.2rem 0;
}

.link-card .desc {
  color: #9fb0ff;
  font-size: 0.9rem;
  margin: 0;
}

/* SNS色のわずかな差 */
.link-card.misskey { background: rgba(120, 200, 255, 0.08); }
.link-card.github  { background: rgba(200, 200, 200, 0.08); }
.link-card.x       { background: rgba(180, 180, 180, 0.08); }

/* 自己紹介 */
#about {
  background: rgba(255, 255, 255, 0.06);
  padding: 2rem 1.5rem 4rem;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  z-index: 1;
}

#about h2 {
  margin-bottom: 1.5rem;
  color: #d0dcff;
}

#about p {
  max-width: 700px;
  margin: 0 auto;
  color: #b8c7ff;
  line-height: 1.9;
}

/* フッター */
footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.9rem;
  color: #8490c0;
  position: relative;
  z-index: 1;
  margin-top: auto; /* ← 下部固定で余白防止 */
}