body{font-family:Arial,Helvetica,sans-serif;background:#f4f7fb;color:#222;margin:0}
header{background:#1f7bd6;color:#fff;padding:12px 16px;display:flex;align-items:center;gap:12px}
.card, .summary, .upload, .activities, .stats{background:#fff;padding:12px;margin:12px;border-radius:8px;box-shadow:0 2px 6px rgba(0,0,0,0.06)}
input, select {padding:8px;margin:6px 0;border-radius:6px;border:1px solid #cbd5e1}
button {background:#1f7bd6;color:#fff;border:none;padding:8px 12px;border-radius:6px;cursor:pointer}
table{width:100%;border-collapse:collapse}th,td{padding:8px;border-bottom:1px solid #eee;text-align:left}
.info{background:#e6fffa;padding:8px;border-radius:6px} .error{background:#ffe6e6;padding:8px;border-radius:6px}