:root{--bg:#f4f6fb;--card:#fff;--accent:#3367D6}
*{box-sizing:border-box;font-family:Inter,system-ui,Segoe UI,Arial}
html,body,#root{height:100%}
body{margin:0;background:var(--bg);color:#111}
.container{max-width:720px;margin:28px auto;padding:18px}
h1{text-align:center;margin:0 0 12px}
.entry-form{display:flex;gap:8px;margin-bottom:18px}
.entry-form input, .entry-form button{padding:10px;border-radius:8px;border:1px solid rgba(0,0,0,0.08)}
.entry-form input[type="text"]{flex:1}
.entry-form input[type="number"]{width:120px}
.entry-form button{background:var(--accent);color:#fff;border:none}
.categories{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}
.category{background:var(--card);padding:12px;border-radius:10px;box-shadow:0 1px 3px rgba(0,0,0,0.06);cursor:pointer}
.category h3{margin:0 0 6px;font-size:16px}
.category p{margin:0;font-weight:600}
.modal{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,0.35)}
.modal.hidden{display:none}
.modal-content{background:var(--card);padding:18px;border-radius:10px;min-width:320px;max-width:90%}
.category-list,.expenses-list{list-style:none;padding:0;margin:8px 0;max-height:260px;overflow:auto}
.category-list li,.expenses-list li{display:flex;justify-content:space-between;padding:8px;border-bottom:1px solid #f0f0f0}
.category-controls{display:flex;gap:8px;margin-top:8px}
.close{margin-top:12px;background:#eee;border:none;padding:8px;border-radius:6px}
.small-btn{background:#f6f7fb;border:1px solid #ddd;padding:6px;border-radius:6px}
.delete-btn{color:#b90;padding-left:8px}
.footer{margin-top:18px;text-align:center;color:#666;font-size:13px}