:root{--bg: #f6f7f9;--surface: #ffffff;--text: #1d1f23;--muted: #5f6672;--border: #d9dde3;--accent: #2456d6;--accent-text: #ffffff;--danger: #b42318;--danger-bg: #fdecea;--success: #1b7f4b;--radius: 8px;--shadow: 0 1px 2px rgba(16, 24, 40, .06);color-scheme:light dark}@media(prefers-color-scheme:dark){:root{--bg: #121418;--surface: #1b1e24;--text: #e8eaee;--muted: #9aa3b0;--border: #2d323b;--accent: #6f93ff;--accent-text: #0b1020;--danger: #f28b82;--danger-bg: #3a1d1b;--success: #6fcf97}}*{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3{margin:0;line-height:1.25}h1{font-size:22px;font-weight:600}h2{font-size:17px;font-weight:600}p{margin:0}.shell{display:grid;grid-template-rows:auto 1fr;min-height:100vh}.shell--sidebar{grid-template-columns:220px 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