:root{--navy:#16425b;--navy-deep:#0e2f43;--teal:#4e7e95;--orange:#e5823a;--bg:#eef2f5;--card:#fff;--line:#d8e1e8;--text:#21313c;--muted:#64798a;--amber-bg:#fff4dd;--amber-line:#e5b96b;--amber-text:#7a5300}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:Hiragino Sans,Hiragino Kaku Gothic ProN,Yu Gothic UI,Meiryo,sans-serif;font-size:14.5px;line-height:1.75}.app{flex-direction:column;height:100%;display:flex}.header{background:linear-gradient(90deg, var(--navy-deep), var(--navy));color:#fff;z-index:10;position:sticky;top:0;box-shadow:0 1px 6px #0e2f4359}.header-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;max-width:960px;margin:0 auto;padding:10px 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