:root{--bg:#0b0c10;--fg:#e5e7eb;--muted:#9aa0a6;--accent:#22c55e}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Helvetica Neue,Arial,Noto Sans,Apple Color Emoji,Segoe UI Emoji}.container{max-width:1280px;margin:0 auto;padding:1rem}.app-header{position:-webkit-sticky;position:sticky;top:0;background:rgba(11,12,16,.7);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border-bottom:1px solid #1f2937;z-index:10}.nav{display:flex;gap:1rem;align-items:center}.brand{font-weight:700}.brand,.nav a{color:var(--fg);text-decoration:none}.nav a{opacity:.9}.nav a:hover{opacity:1}.spacer{flex:1 1}.main{padding-top:1rem}.card{background:#111318;border:1px solid #1f2937;border-radius:12px;padding:1rem}.row{display:flex;gap:.75rem;align-items:center;flex-wrap:wrap}.button{background:var(--accent);color:#062c1b;border:none;border-radius:8px;padding:.6rem .9rem;font-weight:600;cursor:pointer}.button.secondary{background:#1f2937;color:var(--fg)}.input{width:100%;padding:.6rem .75rem;border-radius:8px;border:1px solid #30363d;background:#0d1117;color:var(--fg)}.chip{padding:.25rem .5rem;border-radius:999px;border:1px solid #30363d;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));grid-gap:1rem;gap:1rem}.receipt-grid{grid-template-columns:1fr}@media (min-width:900px){.receipt-grid{grid-template-columns:1fr;max-width:1280px}}.muted{color:var(--muted)}.danger{color:#f87171}