:root{--primary: #4f46e5;--primary-hover: #4338ca;--danger: #ef4444;--danger-hover: #dc2626;--success: #22c55e;--success-hover: #16a34a;--bg: #f4f6f8;--card: #ffffff;--text: #111827;--muted: #6b7280;--border: #e5e7eb;--radius: 8px;--transition: .25s ease}.dark{--bg: #0f172a;--card: #1e293b;--text: #f9fafb;--muted: #9ca3af;--border: #334155}body{margin:0;font-family:Inter,system-ui,sans-serif;background:var(--bg);color:var(--text);transition:background .3s ease,color .3s ease}.app-container{max-width:1100px;margin:40px auto;padding:30px;background:var(--card);border-radius:14px;box-shadow:0 10px 30px #00000014;transition:all .3s ease}h1{text-align:center;margin-bottom:25px}h2{margin-top:30px}form{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:20px}input,select{padding:10px 12px;border-radius:var(--radius);border:1px solid var(--border);outline:none;font-size:14px;transition:all .2s ease}input:focus,select:focus{border-color:var(--primary);box-shadow:0 0 0 2px #4f46e533}button{padding:10px 16px;border-radius:var(--radius);border:none;font-size:14px;cursor:pointer;font-weight:500;transition:transform var(--transition),box-shadow var(--transition),background var(--transition)}button[type=submit],.add-btn{background:var(--primary);color:#fff}.edit-btn{background:var(--success);color:#fff}.delete-btn{background:var(--danger);color:#fff}.export-btn{background:linear-gradient(135deg,#06b6d4,#2563eb);color:#fff;margin-bottom:15px}button:hover{transform:translateY(-2px)}button[type=submit]:hover,.add-btn:hover{background:var(--primary-hover);box-shadow:0 6px 15px #4f46e559}.edit-btn:hover{background:var(--success-hover);box-shadow:0 6px 15px #22c55e59}.delete-btn:hover{background:var(--danger-hover);box-shadow:0 6px 15px #ef444459}.export-btn:hover{box-shadow:0 6px 18px #2563eb66}.dark-toggle{float:right;background:transparent;border:1px solid var(--border);color:var(--text)}.dark-toggle:hover{background:#4f46e51a}table{width:100%;border-collapse:collapse;margin-top:15px}th,td{padding:14px;text-align:center;border-bottom:1px solid var(--border)}th{background:#4f46e514;font-weight:600}tr:hover{background:#4f46e50d}.filter,.date-filter{margin:15px 0;display:flex;gap:10px;align-items:center}.total{text-align:right;font-size:20px;font-weight:700;color:var(--primary)}.action-buttons{display:flex;gap:8px;justify-content:center}.category-badge{padding:4px 10px;border-radius:12px;font-size:12px;font-weight:500;color:#fff}.category-badge.food{background:#22c55e}.category-badge.travel{background:#3b82f6}.category-badge.shopping{background:#a855f7}.category-badge.bills{background:#ef4444}.category-badge.other{background:#6b7280}.chart-container{margin-top:30px;padding:20px;background:var(--card);border-radius:12px;border:1px solid var(--border)}.bar-row{display:flex;align-items:center;margin-bottom:12px}.bar-label{width:80px;font-size:14px}.bar-wrapper{flex:1;background:#e5e7eb;border-radius:var(--radius);overflow:hidden}.bar{background:linear-gradient(90deg,#6366f1,#22c55e);color:#fff;padding:6px 10px;border-radius:var(--radius);font-size:13px}.pie-container{margin-top:40px}.pie{width:200px;height:200px;border-radius:50%;margin:20px auto}.legend{list-style:none;padding:0}.legend li{display:flex;align-items:center;gap:8px;margin-bottom:6px}.dot{width:12px;height:12px;border-radius:50%}body{margin:0;padding:0;font-family:Arial,sans-serif;background-color:#f4f6f8}