:root{--salt-bg: #0b1f3a;--salt-bg-elev: #112a4d;--salt-fg: #e6edf7;--salt-fg-muted: #9aa9bf;--salt-accent: #3a8dde;--salt-warn: #f7a325;--salt-danger: #d8425e;--salt-tier1: #d8425e;--salt-tier2: #f7a325;--salt-success: #4cd07d;--tab-h: 64px;--header-h: 56px}*{box-sizing:border-box}html,body,#root{margin:0;height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--salt-bg);color:var(--salt-fg);-webkit-font-smoothing:antialiased}.app-shell{display:grid;grid-template-rows:var(--header-h) 1fr var(--tab-h);height:100vh;height:100dvh}.app-header{display:flex;align-items:center;justify-content:space-between;padding:0 16px;border-bottom:1px solid var(--salt-bg-elev);background:var(--salt-bg)}.app-title{margin:0;font-size:18px;letter-spacing:.08em}.gps-indicator{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--salt-fg-muted)}.gps-dot{width:8px;height:8px;border-radius:50%;background:var(--salt-tier1);box-shadow:0 0 8px 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