/* ── リセット ── */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Meiryo', sans-serif;
    background-color: #0a0e17;
    color: #e0e0e0;
    line-height: 1.8;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: #00d4ff;
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #7b2ff7;
    text-decoration: underline;
}

/* ── ヘッダー ── */
header {
    text-align: center;
    padding: 80px 20px 40px;
}

.logo {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 3px;
    background: linear-gradient(135deg, #00d4ff, #7b2ff7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.company-name-ja {
    font-size: 16px;
    color: #999;
    letter-spacing: 4px;
}

/* ── メインコンテンツ ── */
main {
    flex: 1;
    max-width: 720px;
    margin: 0 auto;
    padding: 40px 24px;
    width: 100%;
}

.section {
    margin-bottom: 48px;
}

.section-title {
    font-size: 14px;
    font-weight: 600;
    color: #00d4ff;
    letter-spacing: 2px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(0, 212, 255, 0.15);
}

/* ── 会社概要テーブル ── */
.info-table {
    width: 100%;
    border-collapse: collapse;
}

.info-table tr {
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.info-table th {
    text-align: left;
    padding: 14px 16px 14px 0;
    font-size: 14px;
    font-weight: 600;
    color: #888;
    white-space: nowrap;
    width: 140px;
    vertical-align: top;
}

.info-table td {
    padding: 14px 0;
    font-size: 15px;
    color: #ccc;
}

/* ── 事業内容リスト ── */
.business-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.business-item {
    padding: 20px 24px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    transition: border-color 0.3s;
}

.business-item:hover {
    border-color: rgba(0, 212, 255, 0.2);
}

.business-item h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
    color: #e0e0e0;
}

.business-item p {
    font-size: 14px;
    color: #888;
    line-height: 1.7;
}

.business-tag {
    display: inline-block;
    margin-top: 8px;
    margin-right: 6px;
    padding: 3px 10px;
    font-size: 11px;
    border-radius: 20px;
    letter-spacing: 0.5px;
}

.tag-ai {
    background: rgba(0, 212, 255, 0.1);
    color: #00d4ff;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.tag-crypto {
    background: rgba(123, 47, 247, 0.1);
    color: #a875ff;
    border: 1px solid rgba(123, 47, 247, 0.2);
}

/* ── フッター ── */
footer {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 32px 20px 24px;
    text-align: center;
}

.footer-logo {
    font-size: 14px;
    font-weight: 700;
    background: linear-gradient(135deg, #00d4ff, #7b2ff7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 6px;
}

.footer-copy {
    font-size: 12px;
    color: #555;
}

/* ── グリッド背景 ── */
.grid-bg {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: -1;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(0, 212, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
}

/* ── レスポンシブ ── */
@media (max-width: 600px) {
    header { padding: 60px 20px 30px; }
    .logo { font-size: 22px; }
    .info-table th { width: 110px; font-size: 13px; }
    .info-table td { font-size: 14px; }
    main { padding: 30px 16px; }
}