:root{--bg: #f4f6fa;--surface: #ffffff;--sidebar: #0f2038;--sidebar-active: #1c3a63;--border: #e2e7ef;--text: #1a2233;--muted: #66738a;--primary: #1e5fd8;--primary-dark: #1749a8;--green: #15925f;--green-bg: #e5f5ee;--amber: #b9761a;--amber-bg: #fdf1df;--red: #c0392b;--red-bg: #fbe9e7;--rank-a: #15925f;--rank-b: #4c9a2a;--rank-c: #b9761a;--rank-d: #d1671a;--rank-e: #c0392b;--shadow: 0 1px 3px rgba(16, 32, 60, .08), 0 1px 2px rgba(16, 32, 60, .06)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:Segoe UI,Hiragino Kaku Gothic ProN,Noto Sans JP,Meiryo,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}.app{display:flex;min-height:100vh}.sidebar{width:248px;background:var(--sidebar);color:#cdd7e6;display:flex;flex-direction:column;flex-shrink:0;position:sticky;top:0;height:100vh}.sidebar .brand{padding:22px 20px;border-bottom:1px solid rgba(255,255,255,.08)}.sidebar .brand 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