:root{--color-bg: #f9f9ff;--color-bg-elevated: #ffffff;--color-bg-grouped: #ffffff;--color-fg: #000000;--color-fg-secondary: #3c3c43;--color-fg-tertiary: rgba(60, 60, 67, .6);--color-fg-quaternary: rgba(60, 60, 67, .3);--color-border: rgba(60, 60, 67, .18);--color-border-strong: rgba(60, 60, 67, .29);--color-accent-green: #2a8e2a;--color-accent-green-bg: #f6faf6;--color-accent-green-border: #c6e6b0;--color-accent-orange: #ff7a45;--color-accent-orange-bg: #fff8f0;--color-accent-orange-border: #ffd9bf;--color-accent-blue: #4a90e2;--forest-l0: #ebedf0;--forest-l1: #c6e6b0;--forest-l2: #8bc975;--forest-l3: #4a9e3f;--forest-l4: #1f5e2a;--color-error: #d44;--color-error-bg: #fee;--color-success: #2a8e2a;--font-sans: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;--font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;--font-size-xs: 11px;--font-size-sm: 13px;--font-size-base: 15px;--font-size-lg: 17px;--font-size-xl: 22px;--font-size-2xl: 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768px){#app{max-width:var(--content-max-width);margin:0 auto;border-left:1px solid var(--color-border);border-right:1px solid var(--color-border)}}.app-shell{display:flex;flex-direction:column;height:100%;width:100%;position:relative}.app-shell__main{flex:1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch;padding-top:calc(var(--safe-area-top) + var(--header-height))}.tab-bar{display:flex;border-top:.5px solid var(--color-border);background:var(--glass-bg-tinted);-webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);padding-bottom:var(--safe-area-bottom);height:calc(var(--tab-bar-height) + var(--safe-area-bottom));flex-shrink:0}.tab-bar__item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;min-height:var(--touch-target-min);color:var(--color-fg-tertiary);transition:color var(--duration-fast) 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