@font-face {
    font-family: 'DF-ReiSho-W6';
    src: url('font/DF-ReiSho-W6.woff2') format('woff2');
    font-display: swap;
}
body {
    background: linear-gradient(135deg, #232526 0%, #414345 100%);
    color: #f8f9fa;
    min-height: 100vh;
}
.navbar {
    background: rgba(34, 34, 34, 0.95);
    box-shadow: 0 2px 12px #0006;
}
.navbar-brand {
    font-family: 'Segoe UI', 'Meiryo', sans-serif;
    font-size: 1.5rem;
    color: #00e6e6 !important;
    letter-spacing: 0.05em;
}
.panel {
    background: rgba(40, 44, 52, 0.95);
    border-radius: 1em;
    box-shadow: 0 4px 24px #00e6e622;
    border: none;
    margin-top: 2.5em;
}
.panel-heading {
    font-size: 1.3em;
    font-weight: bold;
    background: transparent;
    border-bottom: 1px solid #00e6e6;
    color: #00e6e6;
    border-radius: 1em 1em 0 0;
    padding: 1em 1.5em 0.5em 1.5em;
}
.item-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5em;
    justify-content: center;
    padding: 2em 0;
}
.item-card {
    background: #23272b;
    border-radius: 1em;
    box-shadow: 0 2px 12px #0008;
    width: 260px;
    height: 160px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    transition: transform 0.15s, box-shadow 0.15s;
    color: #fff;
    text-decoration: none;
    font-size: 1.25em;
    position: relative;
}
.item-card:hover {
    transform: translateY(-6px) scale(1.03);
    box-shadow: 0 8px 32px #00e6e655;
    color: #00e6e6;
    text-decoration: none;
}
.item-card i {
    font-size: 2em;
    margin-bottom: 0.3em;
    color: #00e6e6;
    display: block;
}
.east-icon {
    font-size: 2.2em;
    /* margin-bottom: 0.3em; */
    color: #00e6e6;
    display: block;
    font-family: 'DF-ReiSho-W6';
    font-weight: bold;
    letter-spacing: 0.1em;
}
.copyright-footer {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    text-align: center;
    z-index: 9999;
    pointer-events: none;
}
.copyright-footer span {
    background: rgba(24,28,32,0.95);
    color: #aaa;
    padding: 0.3em 1.2em;
    border-radius: 1em;
    font-size: 0.95em;
    pointer-events: auto;
}