:root{--royal-cream-bg: #f8f4ec;--royal-cream-surface: #fffcf5;--royal-anthracite-bar: #1f2024;--royal-anthracite-text: #2a2b30;--royal-bronze: #b08840;--royal-bronze-soft: #d4b989;--royal-stone: #6b6b6b;--royal-stone-light: #d8d5ce;--royal-warning: #a04540;--royal-success: #7b8f6b;--royal-pre-bg: #f0ebe3;--royal-navi-bubble: #f3efe6;--color-bg: var(--royal-cream-bg);--color-surface: var(--royal-cream-surface);--color-text: var(--royal-anthracite-text);--color-text-muted: var(--royal-stone);--color-border: var(--royal-stone-light);--color-accent: var(--royal-bronze);--color-accent-soft: var(--royal-bronze-soft);--color-topbar: var(--royal-anthracite-bar);--color-topbar-text: var(--royal-cream-surface);--color-danger: var(--royal-warning);--color-success: var(--royal-success);--color-user-bubble: var(--royal-cream-surface);--color-user-border: var(--royal-bronze-soft);--color-navi-bubble: var(--royal-navi-bubble);--bg: var(--color-bg);--surface: var(--color-surface);--border: var(--color-border);--text: var(--color-text);--muted: var(--color-text-muted);--accent: var(--color-accent);--user: var(--color-user-bubble);--navi: var(--color-navi-bubble);--shadow-card: 0 1px 3px rgba(31, 32, 36, .06);--radius-card: 6px;--line-body: 1.55;--line-heading: 1.35}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Liberation Sans,sans-serif;font-size:16px;line-height:var(--line-body);background:var(--color-bg);color:var(--color-text);min-height:100vh}#root{min-height:100vh}.app-page{min-height:100vh;display:flex;flex-direction:column}.top-bar{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;height:40px;padding:0 1.5rem;background:var(--color-topbar);color:var(--color-topbar-text);flex-shrink:0}.top-bar-brand{display:flex;align-items:center;gap:.5rem;justify-self:start;color:inherit;text-decoration:none}.top-bar-logo{display:flex;align-items:center;justify-content:center;width:28px;height:28px;flex-shrink:0}.top-bar-logo 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