:root{--bg: #f6f7fb;--surface: #ffffff;--border: #e5e7eb;--text: #111827;--text-muted: #6b7280;--accent: #4f46e5;--accent-hover: #4338ca;--accent-soft: #eef2ff;--danger: #dc2626;--danger-soft: #fef2f2;--success: #16a34a;--success-soft: #f0fdf4;--warn: #d97706;--warn-soft: #fffbeb;--sidebar-bg: #111827;--sidebar-text: #cbd5e1;--sidebar-text-active: #ffffff;--radius: 10px;--shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .08)}*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Inter,Roboto,sans-serif;background:var(--bg);color:var(--text);font-size:14px}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.app-shell{display:flex;min-height:100vh}.sidebar{width:220px;flex-shrink:0;background:var(--sidebar-bg);color:var(--sidebar-text);display:flex;flex-direction:column;padding:20px 12px}.sidebar .brand{color:#fff;font-weight:700;font-size:16px;padding:0 12px 20px}.sidebar .brand 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