:root{--primary-color: #3b82f6;--primary-hover: #2563eb;--success-color: #10b981;--danger-color: #ef4444;--light-bg: #f9fafb;--dark-bg: #1f2937;--card-bg: #ffffff;--dark-card-bg: #374151;--text-color: #1f2937;--text-light: #6b7280;--text-dark: #f9fafb;--border-color: #e5e7eb;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--border-radius: .5rem;--transition: all .3s ease;--container-width: 1200px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;line-height:1.5;color:var(--text-color);background-color:var(--light-bg);min-height:100vh;transition:var(--transition)}h1,h2,h3,h4,h5,h6{margin-bottom:.5rem;font-weight:600;line-height:1.2}h1{font-size:2rem}h2{font-size:1.5rem}p{margin-bottom:1rem}a{color:var(--primary-color);text-decoration:none;transition:var(--transition)}a:hover{color:var(--primary-hover)}button{cursor:pointer;font-family:inherit;border:none;background:none}input,select,textarea{font-family:inherit;font-size:1rem}.dark{color-scheme:dark}.dark body{background-color:var(--dark-bg);color:var(--text-dark)}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:#f1f1f1;border-radius:10px}::-webkit-scrollbar-thumb{background:#888;border-radius:10px}::-webkit-scrollbar-thumb:hover{background:#555}.dark ::-webkit-scrollbar-track{background:#2d3748}.dark ::-webkit-scrollbar-thumb{background:#4a5568}.dark ::-webkit-scrollbar-thumb:hover{background:#718096}.app-container{min-height:100vh;background-color:var(--light-bg);transition:var(--transition)}.dark .app-container{background-color:var(--dark-bg)}.container{width:100%;max-width:var(--container-width);margin:0 auto;padding:2rem 1rem}.app-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem}.logo-container{display:flex;align-items:center}.logo-emoji{font-size:2rem;margin-right:.5rem}.app-title{font-size:2rem;font-weight:700}.theme-toggle{padding:.5rem;border-radius:50%;background-color:#e5e7eb;transition:var(--transition)}.dark .theme-toggle{background-color:#4b5563}.theme-toggle:focus{outline:none;box-shadow:0 0 0 3px #3b82f680}.theme-toggle svg{width:1.25rem;height:1.25rem}.main-grid{display:grid;grid-template-columns:1fr;gap:1.5rem}@media (min-width: 1024px){.main-grid{grid-template-columns:1fr 2fr}}.card{background-color:var(--card-bg);border-radius:var(--border-radius);box-shadow:var(--shadow);padding:1.5rem;margin-bottom:1.5rem;transition:var(--transition)}.dark .card{background-color:var(--dark-card-bg)}.card-title{font-size:1.25rem;font-weight:600;margin-bottom:1rem}.balance-amount{font-size:2.25rem;font-weight:700}.balance-positive{color:var(--success-color)}.balance-negative{color:var(--danger-color)}.summary-grid{display:grid;grid-template-columns:1fr;gap:1rem}@media (min-width: 768px){.summary-grid{grid-template-columns:1fr 1fr}}.summary-card-title{font-size:1.125rem;font-weight:600;margin-bottom:.25rem}.summary-amount{font-size:1.5rem;font-weight:700}.income-amount{color:var(--success-color)}.expense-amount{color:var(--danger-color)}.form-group{margin-bottom:1rem}.form-label{display:block;font-size:.875rem;font-weight:500;margin-bottom:.25rem}.form-input,.form-select{width:100%;padding:.5rem;border:1px solid var(--border-color);border-radius:.375rem;transition:var(--transition)}.form-input:focus,.form-select:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #3b82f640}.checkbox-container{display:flex;align-items:center}.form-checkbox{margin-right:.5rem}.btn{display:inline-block;font-weight:500;text-align:center;padding:.5rem 1rem;border-radius:.375rem;transition:var(--transition);cursor:pointer}.btn-primary{background-color:var(--primary-color);color:#fff;width:100%}.btn-primary:hover{background-color:var(--primary-hover)}.transaction-list{max-height:24rem;overflow-y:auto}.transaction-item{border-bottom:1px solid var(--border-color);padding:.75rem 0}.transaction-item:last-child{border-bottom:none}.transaction-header{display:flex;justify-content:space-between;align-items:flex-start}.transaction-title{font-weight:500}.transaction-meta{font-size:.875rem;color:var(--text-light)}.transaction-amount{font-weight:600}.amount-positive{color:var(--success-color)}.amount-negative{color:var(--danger-color)}.transaction-actions{display:flex;gap:.5rem;margin-top:.5rem;justify-content:flex-end}.action-btn{padding:.25rem;border-radius:.25rem;transition:var(--transition)}.edit-btn{color:var(--primary-color)}.edit-btn:hover{color:var(--primary-hover)}.delete-btn{color:var(--danger-color)}.delete-btn:hover{color:#b91c1c}.edit-form{margin-top:.5rem}.edit-form-row{display:flex;gap:.5rem;margin-bottom:.5rem}.edit-actions{display:flex;gap:.5rem;justify-content:flex-end;align-items:center}.btn-sm{padding:.25rem .75rem;font-size:.875rem}.btn-success{background-color:var(--success-color);color:#fff}.btn-success:hover{background-color:#059669}.btn-cancel{background-color:#e5e7eb;color:var(--text-color)}.btn-cancel:hover{background-color:#d1d5db}.chart-grid{display:grid;grid-template-columns:1fr;gap:1.5rem}@media (min-width: 768px){.chart-grid{grid-template-columns:1fr 1fr}}.chart-title{font-size:1.125rem;font-weight:500;margin-bottom:.5rem}.chart-container{position:relative;height:300px}.footer{margin-top:3rem;text-align:center;color:var(--text-light);font-size:.875rem}