:root{--bg: #0d1117;--bg-raised: #161b22;--bg-hover: #1c2129;--border: #30363d;--border-soft: #21262d;--text: #e6edf3;--text-dim: #9198a1;--text-faint: #6e7681;--accent: #4493f8;--accent-dim: #1f6feb;--green: #3fb950;--yellow: #d29922;--red: #f85149;--purple: #ab7df8;--radius: 8px;--radius-sm: 5px;color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Noto Sans JP,Yu Gothic UI,sans-serif;font-size:14px;line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.35}h1{font-size:20px}h2{font-size:16px}h3{font-size:14px}.app{display:grid;grid-template-columns:244px 1fr;min-height:100%}.sidebar{background:var(--bg-raised);border-right:1px solid var(--border-soft);padding:14px 12px 40px;display:flex;flex-direction:column;gap:18px;position:sticky;top:0;height:100vh;overflow-y:auto}.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:15px;letter-spacing:.02em;padding:4px 6px 10px;border-bottom:1px solid var(--border-soft)}.brand .dot{width:9px;height:9px;border-radius:50%;background:var(--green)}.nav-group>.nav-title{font-size:11px;color:var(--text-faint);font-weight:600;letter-spacing:.08em;padding:0 6px 4px;text-transform:uppercase}.nav-link{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:5px 8px;border-radius:var(--radius-sm);color:var(--text-dim);font-size:13px}.nav-link:hover{background:var(--bg-hover);color:var(--text);text-decoration:none}.nav-link.active{background:var(--bg-hover);color:var(--text);font-weight:600}.nav-link .count{color:var(--text-faint);font-size:11px}.nav-sub{padding-left:10px}.main{min-width:0;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:12px;padding:10px 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