:root{--bg:#edf1f5;--surface:#f7f8fa;--card:#fff;--text:#17212f;--muted:#657387;--line:#d9e1eb;--brand:#253750;--accent:#5573a0;--danger:#a32e3d;--success:#23755b;--radius:18px;--shadow:0 2px 4px #17212f06;--sidebar:248px;font-family:Arial,Helvetica,sans-serif;color:var(--text);background:var(--bg);font-size:14px;line-height:1.55}[data-theme=dark]{--bg:#151c26;--surface:#1b2430;--card:#222e3b;--text:#e8edf4;--muted:#a7b3c4;--line:#374454;--brand:#b9cbe5;--accent:#8facd5;--danger:#ff9ca8;--success:#89d4ba}*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}a,button,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.5;cursor:not-allowed}a{color:inherit;text-decoration:none}a:focus-visible,button:focus-visible{outline:2px solid var(--accent);outline-offset:3px}input,select,textarea{width:100%;border:1px solid var(--line);border-radius:13px;padding:11px 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