:root{--color-primary: #111827;--color-primary-hover: #374151;--color-black: #000000;--color-white: #ffffff;--text-primary: #111827;--text-secondary: #374151;--text-subtle: #4b5563;--text-muted: #6b7280;--text-placeholder: #9ca3af;--text-light: #d1d5db;--text-dark: #1f2937;--bg-page: #f5f5f5;--bg-surface: #ffffff;--bg-surface-hover: #f9fafb;--bg-surface-muted: #fafafa;--bg-disabled: #f9fafb;--border-color: #e5e7eb;--border-light: #f3f4f6;--border-input: #d1d5db;--sidebar-bg: #0a0a0a;--sidebar-border: rgba(255, 255, 255, .07);--sidebar-hover: rgba(255, 255, 255, .07);--sidebar-active: rgba(255, 255, 255, .1);--sidebar-text: #6b7280;--sidebar-text-hover: #e5e7eb;--sidebar-text-active: #ffffff;--success-bg: #f0fdf4;--success-text: #16a34a;--success-border: #bbf7d0;--error-bg: #fef2f2;--error-text: #dc2626;--error-border: #fecaca;--danger: #dc2626;--danger-hover: #b91c1c;--danger-bg: #fee2e2;--danger-border: #fecaca;--danger-bg-hover: #fcd4d4;--danger-border-hover: #f9b3b3;--disabled-bg: #9ca3af;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--text-xs: .62rem;--text-sm: .72rem;--text-md: .82rem;--text-base: .875rem;--text-lg: .95rem;--text-xl: 1rem;--font-normal: 400;--font-medium: 500;--font-semibold: 600;--font-bold: 700;--font-extrabold: 800;--tracking-tight: .02em;--tracking-normal: .06em;--tracking-wide: .08em;--tracking-wider: .1em;--tracking-widest: .14em;--radius-sm: 4px;--radius-md: 5px;--radius-lg: 6px;--radius-xl: 8px;--radius-2xl: 12px;--shadow-focus: 0 0 0 3px rgba(17, 24, 39, .08);--shadow-modal: 0 20px 40px rgba(0, 0, 0, .15);--transition-fast: .15s;--transition-normal: .2s;--transition-slow: .25s;--sidebar-width: 220px;--sidebar-width-mobile: 260px;--topbar-height: 56px;--content-max-width: 640px;--z-sticky: 10;--z-overlay: 40;--z-sidebar: 50;--z-modal: 100}.btn-primary{padding:9px 22px;background-color:var(--color-primary);color:var(--color-white);border:none;border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:var(--font-bold);letter-spacing:var(--tracking-wide);text-transform:uppercase;cursor:pointer;transition:background-color var(--transition-fast);white-space:nowrap}.btn-primary:hover:not(:disabled){background-color:var(--color-primary-hover)}.btn-primary:disabled{background-color:var(--disabled-bg);cursor:not-allowed}.btn-outline{display:flex;align-items:center;gap:6px;padding:6px 14px;background:var(--bg-surface);color:var(--text-secondary);border:1px solid var(--border-color);border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:var(--font-semibold);letter-spacing:var(--tracking-normal);text-transform:uppercase;cursor:pointer;transition:background-color var(--transition-fast),border-color var(--transition-fast)}.btn-outline:hover{background:var(--bg-surface-hover);border-color:var(--text-light)}.btn-icon-danger{background-color:var(--danger-bg);border:1px solid var(--danger-border);color:var(--danger);cursor:pointer;padding:6px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);width:26px;height:26px;transition:background-color var(--transition-fast),border-color var(--transition-fast);flex-shrink:0}.btn-icon-danger:hover:not(:disabled){background-color:var(--danger-bg-hover);border-color:var(--danger-border-hover)}.btn-icon-danger:disabled{opacity:.5;cursor:not-allowed}.form-field label{font-size:.65rem;font-weight:var(--font-bold);letter-spacing:var(--tracking-wider);text-transform:uppercase;color:var(--text-muted)}.form-field input[type=text],.form-field input[type=number],.form-field select{padding:9px 12px;border:1px solid var(--border-color);border-radius:var(--radius-md);font-size:var(--text-base);color:var(--text-primary);background:var(--bg-surface);transition:border-color var(--transition-fast),box-shadow var(--transition-fast);width:100%;box-sizing:border-box}.form-field input:focus,.form-field select:focus{outline:none;border-color:var(--color-primary);box-shadow:var(--shadow-focus)}.form-field input:disabled,.form-field select:disabled{background:var(--bg-disabled);color:var(--text-placeholder)}.form-field-checkbox input[type=checkbox]{width:15px;height:15px;cursor:pointer;accent-color:var(--color-primary)}.form-field-checkbox label{font-size:var(--text-md);font-weight:var(--font-medium);color:var(--text-secondary);cursor:pointer;text-transform:none;letter-spacing:normal}.inline-input{flex:1;padding:9px 12px;border:1px solid var(--border-color);border-radius:var(--radius-md);font-size:var(--text-base);color:var(--text-primary);background:var(--bg-surface);outline:none;transition:border-color 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var(--transition-fast)}.modal-cancel:hover:not(:disabled){border-color:var(--text-placeholder)}.modal-cancel:disabled{opacity:.5;cursor:not-allowed}.modal-confirm{padding:8px 18px;background-color:var(--danger);color:var(--color-white);border:none;border-radius:var(--radius-md);font-size:.8rem;font-weight:var(--font-semibold);cursor:pointer;transition:background-color 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.payment-method-header{background-color:#f0f0f0}.payment-method-name{flex:1;font-weight:600;color:#333;font-size:15px}@media(max-width:1024px){.payment-methods-page{max-width:100%}}.category-customization-page{max-width:var(--content-max-width);margin-bottom:28px}.category-add-form{margin-bottom:20px}.category-empty{color:var(--text-placeholder);font-size:.85rem;padding:20px}.category-list{list-style:none;padding:8px 0;margin:0}.category-item{margin:0;border-bottom:1px solid var(--border-light)}.category-item:last-child{border-bottom:none}.category-header{display:flex;align-items:center;padding:10px 20px;background-color:transparent;cursor:pointer;transition:background-color 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var(--border-color);border-radius:var(--radius-xl);padding:18px 24px;display:flex;flex-direction:column;gap:6px;min-width:140px;flex:1}.analytics-card-label{font-size:var(--text-xs);font-weight:var(--font-semibold);color:var(--text-muted);letter-spacing:var(--tracking-widest);text-transform:uppercase}.analytics-card-value{font-size:1.5rem;font-weight:var(--font-bold);color:var(--text-primary);line-height:1}.analytics-chart-wrapper{background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:24px 20px 16px}.analytics-loading,.analytics-empty{padding:48px 0;text-align:center;font-size:var(--text-base);color:var(--text-muted);letter-spacing:var(--tracking-normal)}.app-layout{display:flex;min-height:100vh}.app-sidebar{width:var(--sidebar-width);flex-shrink:0;background:var(--sidebar-bg);display:flex;flex-direction:column;height:100vh;position:sticky;top:0;overflow:hidden}.sidebar-brand{padding:28px 20px 22px;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--sidebar-border)}.sidebar-logo{width:34px;height:34px;object-fit:contain;filter:invert(1);flex-shrink:0}.sidebar-brand-text{display:flex;flex-direction:column;gap:3px}.sidebar-brand-name{font-size:var(--text-xl);font-weight:var(--font-bold);color:var(--color-white);letter-spacing:var(--tracking-tight);line-height:1}.sidebar-brand-sub{font-size:.6rem;color:var(--text-subtle);letter-spacing:var(--tracking-wider);text-transform:uppercase;line-height:1}.sidebar-nav{flex:1;padding:14px 10px;display:flex;flex-direction:column;gap:2px}.sidebar-nav-item{display:flex;align-items:center;gap:10px;padding:9px 12px;background:none;border:none;border-radius:var(--radius-md);font-size:var(--text-sm);font-weight:var(--font-semibold);letter-spacing:var(--tracking-wider);text-transform:uppercase;color:var(--sidebar-text);cursor:pointer;transition:background-color var(--transition-fast),color var(--transition-fast);text-align:left;width:100%}.sidebar-nav-item:hover{background:var(--sidebar-hover);color:var(--sidebar-text-hover)}.sidebar-nav-item.active{background:var(--sidebar-active);color:var(--sidebar-text-active)}.sidebar-nav-icon{font-size:15px;flex-shrink:0}.sidebar-footer{padding:14px 12px;border-top:1px solid var(--sidebar-border);display:flex;align-items:center;justify-content:space-between;gap:8px}.sidebar-user{display:flex;align-items:center;gap:8px;min-width:0}.sidebar-avatar{width:28px;height:28px;background:var(--text-dark);color:var(--text-light);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:var(--text-sm);font-weight:var(--font-bold);flex-shrink:0}.sidebar-username{font-size:.78rem;color:var(--text-placeholder);font-weight:var(--font-medium);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-logout{background:none;border:none;color:var(--text-subtle);cursor:pointer;padding:5px;border-radius:var(--radius-sm);display:flex;align-items:center;transition:color var(--transition-fast);flex-shrink:0}.sidebar-logout:hover{color:var(--color-white)}.app-main{flex:1;display:flex;flex-direction:column;min-height:100vh;background:var(--bg-page);min-width:0}.app-topbar{background:var(--bg-surface);border-bottom:1px solid var(--border-color);padding:0 32px;height:var(--topbar-height);display:flex;align-items:center;justify-content:space-between;flex-shrink:0;position:sticky;top:0;z-index:var(--z-sticky)}.app-topbar-title{font-size:var(--text-sm);font-weight:var(--font-bold);letter-spacing:var(--tracking-widest);text-transform:uppercase;color:var(--text-primary);margin:0}.app-topbar-actions{display:flex;align-items:center;gap:8px}.app-content{padding:28px 32px;flex:1}.mobile-menu-btn{display:none;background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:6px;border-radius:var(--radius-md);align-items:center;justify-content:center;transition:background-color var(--transition-fast)}.mobile-menu-btn:hover{background:var(--border-light)}.sidebar-close-btn{display:none;background:none;border:none;color:var(--sidebar-text);cursor:pointer;padding:4px;border-radius:var(--radius-sm);align-items:center;justify-content:center;margin-left:auto;transition:color var(--transition-fast)}.sidebar-close-btn:hover{color:var(--color-white)}.sidebar-overlay{display:none}@media(max-width:1024px){.mobile-menu-btn,.sidebar-close-btn{display:flex}.sidebar-overlay{display:block;position:fixed;top:0;right:0;bottom:0;left:0;background-color:#00000080;z-index:var(--z-overlay)}.app-sidebar{position:fixed;left:0;top:0;bottom:0;z-index:var(--z-sidebar);transform:translate(-100%);transition:transform var(--transition-slow) ease;width:var(--sidebar-width-mobile);overflow-y:auto}.app-sidebar.open{transform:translate(0)}.sidebar-footer{position:sticky;bottom:0;left:0;right:0;margin:0}.app-topbar{padding:0 16px;gap:12px}.app-content{padding:16px}}