:root{color-scheme:light dark;--bg: #f5f6f8;--bg-elevated: #ffffff;--bg-hover: #ecedf1;--border: #dde1e6;--text: #1b1e24;--text-muted: #6b7280;--accent: #3457d5;--accent-contrast: #ffffff;--danger: #c23b3b;--warning: #b8860b;--success: #1f9254;--status-created: #9ca3af;--status-linking: #b8860b;--status-active: #1f9254;--status-expired: #c2793b;--status-banned: #c23b3b;--status-offline: #6b7280;--status-deleted: #4b5563;--radius: 8px;--shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}@media (prefers-color-scheme: dark){:root{--bg: #16181d;--bg-elevated: #1e2127;--bg-hover: #262a32;--border: #2e333c;--text: #e7e9ec;--text-muted: #9aa1ac;--accent: #7c96ff;--accent-contrast: #0c1020;--danger: #ef6a6a;--warning: #e0b04d;--success: #4ed08a;--status-created: #6b7280;--status-linking: #e0b04d;--status-active: #4ed08a;--status-expired: #e08a4d;--status-banned: #ef6a6a;--status-offline: #9aa1ac;--status-deleted: #6b7280;--shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 1px 3px rgba(0, 0, 0, .5)}}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--bg);color:var(--text)}button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}a{color:var(--accent)}.app-shell{display:flex;height:100%}.sidebar{width:220px;flex-shrink:0;background:var(--bg-elevated);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:16px 12px;gap:4px}.sidebar .brand{font-weight:700;font-size:15px;padding:8px;margin-bottom:8px}.nav-link{display:block;padding:8px 10px;border-radius:var(--radius);color:var(--text);text-decoration:none;font-size:14px}.nav-link:hover{background:var(--bg-hover)}.nav-link.active{background:var(--accent);color:var(--accent-contrast)}.sidebar-footer{margin-top:auto;font-size:12px;color:var(--text-muted);padding:8px 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