:root{--bg: #f4f6fb;--card: #ffffff;--muted: #8e94a6;--accent: #1f2b6c}html,body,#root{height:100%;margin:0;font-family:Inter,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg)}.app-container{padding:20px 28px;max-width:1400px;margin:0 auto}.header-spacer{height:16px}.panel{background:#fff;border-radius:14px;padding:18px;box-shadow:0 6px 18px #0f172a0f;border:1px solid rgba(13,26,62,.03)}.add-tile{min-width:220px;height:120px;border-radius:12px;display:flex;align-items:center;justify-content:center;cursor:pointer;border:1px dashed rgba(13,26,62,.06);background:linear-gradient(180deg,#fafaff99,#f0f6ff99)}.small-muted{color:var(--muted);font-size:13px}