*{box-sizing:border-box;margin:0;padding:0}:root{--color-primary: #10b981;--color-danger: #ef4444;--color-info: #3b82f6;--color-warning: #f59e0b;--bg-primary: #ffffff;--bg-secondary: #f9fafb;--bg-tertiary: #f3f4f6;--text-primary: #111827;--text-secondary: #6b7280;--text-tertiary: #9ca3af;--border-color: #e5e7eb;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--radius-sm: .5rem;--radius-md: .75rem;--radius-lg: 1rem;--tap-target: 48px;--spacing-unit: 1rem}@media (prefers-color-scheme: dark){:root:not(.light){--bg-primary: #111827;--bg-secondary: #1f2937;--bg-tertiary: #374151;--text-primary: #f9fafb;--text-secondary: #d1d5db;--text-tertiary: #9ca3af;--border-color: #374151;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .5)}}:root.dark{--bg-primary: #111827;--bg-secondary: #1f2937;--bg-tertiary: #374151;--text-primary: #f9fafb;--text-secondary: #d1d5db;--text-tertiary: #9ca3af;--border-color: #374151;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .5)}:root.light{--bg-primary: #ffffff;--bg-secondary: #f9fafb;--bg-tertiary: #f3f4f6;--text-primary: #111827;--text-secondary: #6b7280;--text-tertiary: #9ca3af;--border-color: #e5e7eb;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1)}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,sans-serif;font-size:16px;line-height:1.5;color:var(--text-primary);background:var(--bg-secondary);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;padding-bottom:env(safe-area-inset-bottom)}.app{min-height:100vh;display:flex;flex-direction:column;padding-bottom:80px}.month-header{background:var(--bg-primary);border-bottom:1px solid 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1rem;text-align:center;margin:1rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.remaining-hero.negative{background:linear-gradient(135deg,var(--color-danger) 0%,#dc2626 100%)}.remaining-label{font-size:.875rem;opacity:.9;font-weight:500;text-transform:uppercase;letter-spacing:.05em}.remaining-amount{font-size:3rem;font-weight:800;margin:.5rem 0;line-height:1}.remaining-subtitle{font-size:.875rem;opacity:.8}.budget-summary{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem;padding:0 1rem 1rem}.summary-card{background:var(--bg-primary);padding:1rem;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);border:1px solid var(--border-color)}.summary-label{font-size:.75rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;font-weight:600;margin-bottom:.5rem}.summary-value{font-size:1.125rem;font-weight:700;color:var(--text-primary)}.summary-value.income{color:var(--color-primary)}.summary-value.expense{color:var(--color-danger)}.summary-value.savings{color:var(--color-info)}.summary-value.fixed{color:var(--text-secondary)}.section{margin:1rem;background:var(--bg-primary);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);border:1px solid var(--border-color);overflow:hidden}.section-header{padding:1rem;display:flex;justify-content:space-between;align-items:center;cursor:pointer;user-select:none;transition:background .2s}.section-header:active{background:var(--bg-tertiary)}.section-title{font-size:1rem;font-weight:600;color:var(--text-primary);display:flex;align-items:center;gap:.5rem}.section-amount{font-size:1rem;font-weight:700;color:var(--text-secondary)}.section-chevron{transition:transform .3s}.section-chevron.open{transform:rotate(180deg)}.section-content{max-height:0;overflow:hidden;transition:max-height .3s ease-out}.section-content.open{max-height:1000px}.section-items{padding:0 1rem 1rem}.section-item{display:flex;justify-content:space-between;align-items:center;padding:.75rem;border-top:1px solid var(--border-color)}.section-item-name{font-size:.875rem;color:var(--text-primary);display:flex;align-items:center;gap:.5rem}.section-item-amount{font-size:.875rem;font-weight:600;color:var(--text-secondary)}.categories-section{margin:1rem}.section-heading{font-size:.875rem;font-weight:700;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;padding:0 .5rem .75rem}.category-list{display:flex;flex-direction:column;gap:.75rem}.category-card{background:var(--bg-primary);padding:1rem;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);border:1px solid var(--border-color);cursor:pointer;transition:all .2s}.category-card:active{transform:translateY(-2px);box-shadow:var(--shadow-md)}.category-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:.75rem}.category-title{display:flex;align-items:center;gap:.5rem;font-weight:600;font-size:.9375rem;color:var(--text-primary)}.category-icon{font-size:1.25rem}.category-remaining{font-size:1.125rem;font-weight:700;color:var(--text-primary)}.category-remaining.warning{color:var(--color-warning)}.category-remaining.danger{color:var(--color-danger)}.category-progress{height:6px;background:var(--bg-tertiary);border-radius:3px;overflow:hidden;margin-bottom:.5rem}.category-progress-bar{height:100%;transition:width .3s ease,background-color .3s;border-radius:3px}.category-progress-bar.safe{background:var(--color-primary)}.category-progress-bar.warning{background:var(--color-warning)}.category-progress-bar.danger{background:var(--color-danger)}.category-info{display:flex;justify-content:space-between;font-size:.8125rem;color:var(--text-secondary)}.fab{position:fixed;bottom:calc(80px + env(safe-area-inset-bottom));right:1.5rem;width:64px;height:64px;background:var(--color-primary);color:#fff;border:none;border-radius:50%;font-size:2rem;font-weight:300;line-height:1;box-shadow:var(--shadow-lg);cursor:pointer;transition:all .2s;z-index:200;display:flex;align-items:center;justify-content:center}.fab:active{transform:scale(.9) rotate(45deg)}.bottom-nav{position:fixed;bottom:0;left:0;right:0;background:var(--bg-primary);border-top:1px solid var(--border-color);display:flex;justify-content:space-around;padding:.5rem 0;padding-bottom:calc(.5rem + env(safe-area-inset-bottom));box-shadow:0 -2px 10px #0000000d;z-index:150}.nav-item{display:flex;flex-direction:column;align-items:center;gap:.25rem;padding:.5rem 1rem;color:var(--text-tertiary);text-decoration:none;font-size:.75rem;font-weight:500;border:none;background:none;cursor:pointer;transition:color .2s;min-width:64px}.nav-item.active{color:var(--color-primary)}.nav-icon{font-size:1.5rem}.modal-overlay{position:fixed;inset:0;background:#0009;z-index:1000;display:flex;align-items:flex-end;animation:fadeIn .2s;backdrop-filter:blur(4px)}.modal{background:var(--bg-primary);width:100%;max-height:85vh;border-radius:var(--radius-lg) var(--radius-lg) 0 0;padding:1.5rem;animation:slideUp .3s cubic-bezier(.4,0,.2,1);overflow-y:auto}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--border-color)}.modal-title{font-size:1.5rem;font-weight:700;color:var(--text-primary)}.modal-close{background:var(--bg-tertiary);border:none;width:36px;height:36px;border-radius:50%;font-size:1.25rem;cursor:pointer;color:var(--text-secondary);transition:all .2s;display:flex;align-items:center;justify-content:center}.modal-close:active{transform:scale(.9);background:var(--color-danger);color:#fff}.form-group{margin-bottom:1.5rem}.form-label{display:block;font-weight:600;margin-bottom:.5rem;color:var(--text-primary);font-size:.9375rem}.form-input{width:100%;padding:1rem;font-size:1.125rem;border:2px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-secondary);color:var(--text-primary);min-height:var(--tap-target);transition:all .2s}.form-input:focus{outline:none;border-color:var(--color-primary);background:var(--bg-primary)}.form-checkbox{display:flex;align-items:center;gap:.75rem;padding:1rem;background:var(--bg-secondary);border-radius:var(--radius-md);cursor:pointer;user-select:none}.form-checkbox input{width:24px;height:24px;cursor:pointer}.form-checkbox label{cursor:pointer;font-size:.9375rem;color:var(--text-primary)}.category-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem}.category-tile{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:1.25rem .75rem;min-height:80px;background:var(--bg-secondary);border:2px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;transition:all .2s}.category-tile:active,.category-tile.selected{background:var(--color-primary);border-color:var(--color-primary);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md)}.category-tile-icon{font-size:2rem;margin-bottom:.5rem}.category-tile-name{font-size:.8125rem;font-weight:600;text-align:center;line-height:1.2}.toggle-group{display:flex;gap:.5rem;margin-bottom:1.5rem;background:var(--bg-secondary);padding:.25rem;border-radius:var(--radius-md)}.toggle-btn{flex:1;padding:.75rem;border:none;background:transparent;border-radius:calc(var(--radius-md) - .25rem);font-weight:600;font-size:.9375rem;cursor:pointer;transition:all .2s;color:var(--text-secondary)}.toggle-btn.active{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-sm)}.btn{display:block;width:100%;padding:1rem;min-height:var(--tap-target);font-size:1.0625rem;font-weight:600;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all .2s}.btn:active{transform:scale(.98)}.btn-primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-md)}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.sync-status{position:fixed;bottom:calc(80px + 1rem + env(safe-area-inset-bottom));left:1rem;background:var(--text-primary);color:var(--bg-primary);padding:.625rem 1rem;border-radius:2rem;font-size:.8125rem;font-weight:500;box-shadow:var(--shadow-lg);z-index:99;display:flex;align-items:center;gap:.5rem}.error-message{color:var(--color-danger);font-size:.875rem;margin-top:.5rem;padding:.75rem;background:#ef44441a;border-radius:var(--radius-md)}.segmented-control{display:flex;gap:.5rem;padding:.5rem;background:var(--bg-tertiary);border-radius:var(--radius-lg);margin-bottom:1.5rem}.segmented-button{flex:1;min-height:48px;padding:.75rem 1rem;background:transparent;border:none;border-radius:var(--radius-md);font-size:1rem;font-weight:600;color:var(--text-secondary);cursor:pointer;transition:all .2s ease}.segmented-button:active{transform:scale(.98)}.segmented-button.active{background:#fff;color:#fff;box-shadow:var(--shadow-sm)}.segmented-button.active.expense{background:var(--color-danger)}.segmented-button.active.income{background:var(--color-primary)}.segmented-button.active.savings{background:var(--color-info)}:root.dark .segmented-button.active{box-shadow:0 2px 4px #0000004d}.form-input.amount-expense{border-color:var(--color-danger)}.form-input.amount-expense:focus{border-color:var(--color-danger);box-shadow:0 0 0 3px #ef44441a}.form-input.amount-income{border-color:var(--color-primary)}.form-input.amount-income:focus{border-color:var(--color-primary);box-shadow:0 0 0 3px #10b9811a}.form-input.amount-savings{border-color:var(--color-info)}.form-input.amount-savings:focus{border-color:var(--color-info);box-shadow:0 0 0 3px #3b82f61a}.user-badge{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;background:var(--text-tertiary);color:#fff;border-radius:50%;font-size:.625rem;font-weight:700}@media (min-width: 768px){.app{max-width:480px;margin:0 auto;box-shadow:var(--shadow-lg)}.remaining-hero{margin:1.5rem}.budget-summary{padding:0 1.5rem 1.5rem}.section,.categories-section{margin:1.5rem}.fab{right:2rem}.modal{max-width:480px;margin:auto;border-radius:var(--radius-lg)}.modal-overlay{align-items:center}}.loading{display:flex;align-items:center;justify-content:center;min-height:50vh;color:var(--text-secondary)}.empty-state{text-align:center;padding:3rem 2rem;color:var(--text-secondary)}.empty-icon{font-size:4rem;margin-bottom:1rem;opacity:.5}.empty-message{font-size:1.125rem;font-weight:500}.update-banner{position:fixed;top:1rem;left:1rem;right:1rem;background:var(--bg-primary);border:2px solid var(--color-primary);border-radius:var(--radius-lg);padding:1rem;box-shadow:var(--shadow-lg);z-index:2000;animation:slideDown .3s ease-out}@keyframes slideDown{0%{opacity:0;transform:translateY(-100%)}to{opacity:1;transform:translateY(0)}}.update-content{display:flex;align-items:center;gap:1rem;margin-bottom:1rem}.update-icon{font-size:2rem;flex-shrink:0;animation:rotate 2s linear infinite}@keyframes rotate{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.update-text{flex:1}.update-title{font-size:1rem;font-weight:700;color:var(--text-primary);margin-bottom:.25rem}.update-subtitle{font-size:.875rem;color:var(--text-secondary);line-height:1.3}.update-actions{display:flex;gap:.75rem}.update-btn{flex:1;padding:.75rem 1rem;border:none;border-radius:var(--radius-md);font-size:.9375rem;font-weight:600;cursor:pointer;transition:all .2s}.update-btn-primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-sm)}.update-btn-primary:active{transform:scale(.98)}.update-btn-secondary{background:var(--bg-tertiary);color:var(--text-primary)}.update-btn-secondary:active{transform:scale(.98)}@media (min-width: 768px){.update-banner{left:50%;right:auto;transform:translate(-50%);max-width:480px}}.transaction-list{display:flex;flex-direction:column;gap:.75rem}.transaction-item{background:var(--bg-primary);padding:1rem;border-radius:var(--radius-md);box-shadow:var(--shadow-sm);border:1px solid var(--border-color);cursor:pointer;transition:all .2s;display:flex;align-items:center;gap:1rem}.transaction-item:active{transform:translateY(-2px);box-shadow:var(--shadow-md)}.transaction-amount{font-size:1.125rem;font-weight:700}.transaction-amount.expense{color:var(--color-danger)}.transaction-amount.income{color:var(--color-primary)}.filter-select{padding:.5rem .75rem;border:2px solid var(--border-color);border-radius:var(--radius-md);background:var(--bg-primary);color:var(--text-primary);font-size:.875rem;font-weight:600;cursor:pointer;min-width:120px}.filter-select:focus{outline:none;border-color:var(--color-primary)}.undo-toast{position:fixed;bottom:calc(80px + 1rem + env(safe-area-inset-bottom));left:50%;transform:translate(-50%);background:var(--text-primary);color:var(--bg-primary);padding:1rem 1.5rem;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);z-index:2000;display:flex;align-items:center;gap:1.5rem;animation:slideUp .3s ease-out;max-width:90%}.undo-toast .undo-btn{background:var(--color-primary);color:#fff;border:none;padding:.5rem 1rem;border-radius:var(--radius-md);font-weight:600;font-size:.875rem;cursor:pointer;white-space:nowrap}.undo-toast .undo-btn:active{transform:scale(.95)}@media (min-width: 768px){.undo-toast{max-width:480px}}.onboarding-overlay{position:fixed;inset:0;background:var(--bg-primary);z-index:3000;display:flex;align-items:center;justify-content:center;padding:2rem}.onboarding-modal{width:100%;max-width:480px;animation:slideUp .3s ease-out}.onboarding-header{text-align:center;margin-bottom:2rem}.onboarding-title{font-size:1.75rem;font-weight:700;color:var(--text-primary);margin-bottom:.5rem}.onboarding-subtitle{font-size:1rem;color:var(--text-secondary)}.onboarding-content{background:var(--bg-secondary);border-radius:var(--radius-lg);padding:1.5rem}.user-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:1rem;margin-bottom:1rem}.user-card{display:flex;flex-direction:column;align-items:center;gap:.75rem;padding:1.5rem 1rem;background:var(--bg-primary);border:2px solid var(--border-color);border-radius:var(--radius-lg);cursor:pointer;transition:all .2s}.user-card:hover{border-color:var(--color-primary);transform:translateY(-2px);box-shadow:var(--shadow-md)}.user-card:active{transform:translateY(0)}.user-avatar{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--color-primary),var(--color-info));color:#fff;display:flex;align-items:center;justify-content:center;font-size:1.75rem;font-weight:700}.user-name{font-size:1rem;font-weight:600;color:var(--text-primary)}