:root{--c-bg: #f4f6fb;--c-surface: #ffffff;--c-border: #e2e8f0;--c-text: #1e293b;--c-muted: #64748b;--c-primary: #1d4ed8;--c-primary-dark: #1739a8;--c-primary-soft: #e8eeff;--c-success: #15803d;--c-success-soft: #dcfce7;--c-warning: #b45309;--c-warning-soft: #fef3c7;--c-danger: #b91c1c;--c-danger-soft: #fee2e2;--radius: 10px;--shadow: 0 1px 3px rgba(15, 23, 42, .08)}*{box-sizing:border-box}html,body,#app{min-height:100%;margin:0}body{background:var(--c-bg);color:var(--c-text);font-family:Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;font-size:14px;line-height:1.55}a{color:var(--c-primary);text-decoration:none}a:hover{text-decoration:underline}h1{font-size:22px;margin:0 0 4px}h2{font-size:17px;margin:0 0 12px}h3{font-size:15px;margin:0 0 8px}.app-shell{display:flex;min-height:100vh}.sidebar{width:232px;flex:0 0 232px;background:#0f172a;color:#cbd5e1;display:flex;flex-direction:column;padding:16px 12px;gap:4px}.sidebar .brand{color:#fff;font-weight:700;font-size:15px;padding:6px 10px 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