:root{--stage: #f0f0f5;--surface: #ffffff;--surface-raised: rgba(255, 255, 255, .98);--hairline: rgba(0, 0, 0, .06);--border: #e4e4e7;--text: #18181b;--text-muted: #71717a;--text-subtle: #a1a1aa;--hover: rgba(0, 0, 0, .045);--selected: rgba(0, 0, 0, .07);--accent: #3b82f6;--danger: #dc2626;--warning: #d97706;--pill-shadow: 0 2px 8px rgba(0, 0, 0, .06), 0 8px 24px rgba(0, 0, 0, .08);--sidebar-width: 248px;--ease-out: cubic-bezier(.2, .8, .2, 1)}#app{display:flex;flex-direction:column;height:100vh}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.btn{display:inline-flex;align-items:center;justify-content:center;height:32px;padding:0 12px;background:var(--surface);border:1px solid var(--border);border-radius:8px;color:var(--text);font:inherit;font-size:13px;font-weight:500;text-decoration:none;cursor:pointer;transition:background .15s ease,border-color .15s 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