:root {
    --bg-color: #050505;
    --accent-color: #00ff88; /* ネオングリーン */
    --text-color: #ffffff;
    --font-jp: 'Inter', 'Noto Sans JP', sans-serif;
}

body {
    font-family: var(--font-jp);
    background-color: var(--bg-color);
    margin: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-color);
    overflow: hidden; /* 余計なスクロールを防ぐ */
    -webkit-font-smoothing: antialiased;
}

/* ざらざらした質感を出すノイズ */
.noise {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: 100;
    opacity: 0.05;
    pointer-events: none;
    background-image: url('https://upload.wikimedia.org/wikipedia/commons/7/76/1k_Static_Noise_Graphic.png');
}

/* マウスストーカー */
#cursor-follower {
    position: fixed;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0, 255, 136, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

.container {
    position: relative;
    z-index: 10;
    width: 90%;
    max-width: 900px;
}

h1 {
    font-size: 0.7rem;
    font-weight: 300;
    letter-spacing: 0.8rem;
    text-align: center;
    margin-bottom: 80px;
    opacity: 0.4;
    text-transform: uppercase;
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 2px; /* 隙間をあえて狭くしてグリッド感を出す */
    background: rgba(255, 255, 255, 0.1); /* 境界線代わり */
}

.link-card {
    text-decoration: none;
    color: inherit;
    padding: 40px 20px;
    background: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
}

.link-card:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--accent-color);
}

.name {
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.3rem;
    text-indent: 0.3rem;
    transition: all 0.4s ease;
}

.link-card:hover .name {
    letter-spacing: 0.5rem;
    text-indent: 0.5rem;
}

/* 角の装飾（L字の飾り） */
.link-card::before {
    content: '';
    position: absolute;
    top: 10px; left: 10px;
    width: 5px; height: 5px;
    border-top: 1px solid rgba(255,255,255,0.2);
    border-left: 1px solid rgba(255,255,255,0.2);
    transition: 0.3s;
}

.link-card:hover::before {
    border-color: var(--accent-color);
    transform: translate(-2px, -2px);
}