:root{--color-primary: #4f46e5;--color-primary-hover: #4338ca;--color-success: #059669;--color-warning: #d97706;--color-danger: #dc2626;--color-bg: #f8fafc;--color-surface: #ffffff;--color-border: #e2e8f0;--color-text: #1e293b;--color-text-muted: #64748b;--color-sidebar: #1e293b;--color-sidebar-text: #cbd5e1;--color-sidebar-active: #4f46e5;--radius: 8px;--shadow: 0 1px 3px rgba(0, 0, 0, .1);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .1)}[data-theme=dark]{--color-primary: #818cf8;--color-primary-hover: #6366f1;--color-success: #34d399;--color-warning: #fbbf24;--color-danger: #f87171;--color-bg: #0f172a;--color-surface: #1e293b;--color-border: #334155;--color-text: #f1f5f9;--color-text-muted: #94a3b8;--color-sidebar: #0f172a;--color-sidebar-text: #94a3b8;--color-sidebar-active: #818cf8;--shadow: 0 1px 3px rgba(0, 0, 0, .3);--shadow-lg: 0 4px 12px rgba(0, 0, 0, .4)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text);line-height:1.6}.app-layout{display:flex;flex-direction:column;min-height:100vh}.app-header{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:60px;background:var(--color-surface);border-bottom:1px solid var(--color-border);box-shadow:var(--shadow);z-index:10}.header-title{font-size:1.25rem;font-weight:700}.header-right{display:flex;align-items:center;gap:12px}.user-name{color:var(--color-text-muted);font-size:.875rem}.app-body{display:flex;flex:1}.sidebar{width:220px;background:var(--color-sidebar);padding:16px 0;min-height:calc(100vh - 60px)}.sidebar-nav{list-style:none}.sidebar-link{display:flex;align-items:center;gap:12px;padding:12px 24px;color:var(--color-sidebar-text);text-decoration:none;font-size:.9375rem;transition:all .15s}.sidebar-link:hover{background:#ffffff0d}.sidebar-link.active{background:var(--color-sidebar-active);color:#fff}.sidebar-icon{font-size:1.125rem}.app-main{flex:1;padding:24px;overflow-y:auto}.page{max-width:1200px}.page-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.page h2{font-size:1.5rem;font-weight:700;margin-bottom:24px}.page-header h2{margin-bottom:0}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-bottom:32px}.stat-card{display:flex;align-items:center;gap:16px;padding:20px;background:var(--color-surface);border-radius:var(--radius);box-shadow:var(--shadow);border-left:4px solid var(--color-border)}.stat-card-default{border-left-color:var(--color-primary)}.stat-card-success{border-left-color:var(--color-success)}.stat-card-warning{border-left-color:var(--color-warning)}.stat-card-danger{border-left-color:var(--color-danger)}.stat-card-icon{font-size:2rem}.stat-card-title{font-size:.8125rem;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em}.stat-card-value{font-size:1.5rem;font-weight:700}.stat-card-subtitle{font-size:.8125rem;color:var(--color-text-muted)}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius);font-size:.875rem;font-weight:500;cursor:pointer;transition:all .15s;border:1px solid transparent}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover)}.btn-outline{background:transparent;color:var(--color-text);border-color:var(--color-border)}.btn-outline:hover:not(:disabled){background:var(--color-bg)}.btn-danger{background:transparent;color:var(--color-danger);border-color:var(--color-danger)}.btn-danger:hover:not(:disabled){background:var(--color-danger);color:#fff}.btn-sm{padding:4px 10px;font-size:.8125rem}.bill-form{background:var(--color-surface);padding:24px;border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:24px}.bill-form h2{font-size:1.125rem;margin-bottom:16px}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}.form-group{display:flex;flex-direction:column;gap:4px}.form-group-full{grid-column:1 / -1}.form-group label{font-size:.8125rem;font-weight:600;color:var(--color-text-muted)}.form-group input,.form-group select,.form-group textarea{padding:8px 12px;border:1px solid var(--color-border);border-radius:var(--radius);font-size:.875rem;background:var(--color-surface);color:var(--color-text)}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #4f46e51a}.form-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:16px}.bill-filters{background:var(--color-surface);padding:16px;border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:16px}.filters-row{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end}.filter-group{display:flex;flex-direction:column;gap:4px;min-width:120px}.filter-group label{font-size:.75rem;font-weight:600;color:var(--color-text-muted)}.filter-group input,.filter-group select{padding:6px 10px;border:1px solid var(--color-border);border-radius:var(--radius);font-size:.8125rem;background:var(--color-surface);color:var(--color-text)}.tag-input-container{border:1px solid var(--color-border);border-radius:var(--radius);padding:4px 8px;background:var(--color-surface);min-height:38px}.tag-chips{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.tag-chip{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;background:var(--color-primary);color:#fff;border-radius:12px;font-size:.75rem;font-weight:500}.tag-chip-remove{background:none;border:none;color:inherit;cursor:pointer;font-size:.875rem;line-height:1;padding:0 2px;opacity:.8}.tag-chip-remove:hover{opacity:1}.tag-text-input{border:none!important;outline:none!important;box-shadow:none!important;padding:2px 4px!important;font-size:.875rem;background:transparent!important;color:var(--color-text);flex:1;min-width:80px}.bill-tags{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:8px}.tag-badge{display:inline-block;padding:2px 8px;border-radius:12px;font-size:.6875rem;font-weight:500;background:var(--color-primary);color:#fff;opacity:.85}.theme-toggle{font-size:1.125rem;padding:4px 8px;line-height:1}.bill-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}.bill-card{background:var(--color-surface);padding:16px;border-radius:var(--radius);box-shadow:var(--shadow);transition:box-shadow .15s}.bill-card:hover{box-shadow:var(--shadow-lg)}.bill-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.bill-store{font-size:1rem;font-weight:600}.bill-amount{font-size:1.125rem;font-weight:700;color:var(--color-primary)}.bill-card-body{display:flex;gap:8px;align-items:center;margin-bottom:8px}.bill-date{font-size:.8125rem;color:var(--color-text-muted)}.badge{display:inline-block;padding:2px 8px;border-radius:12px;font-size:.75rem;font-weight:500;background:var(--color-bg);color:var(--color-text-muted)}.bill-notes{font-size:.8125rem;color:var(--color-text-muted);margin-bottom:8px;font-style:italic}.bill-card-actions{display:flex;gap:8px;justify-content:flex-end}.results-count{font-size:.8125rem;color:var(--color-text-muted);margin-bottom:16px}.chart-container{background:var(--color-surface);padding:24px;border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:24px}.chart-container h3{font-size:1rem;font-weight:600;margin-bottom:16px}.reports-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(500px,1fr));gap:24px}.empty-chart{text-align:center;color:var(--color-text-muted);padding:40px}.settings-section{background:var(--color-surface);padding:24px;border-radius:var(--radius);box-shadow:var(--shadow)}.settings-section h3{font-size:1.125rem;margin-bottom:8px}.settings-description{color:var(--color-text-muted);font-size:.875rem;margin-bottom:16px}.success-message{margin-top:12px;color:var(--color-success);font-weight:500}.empty-state{text-align:center;padding:60px 24px;color:var(--color-text-muted);background:var(--color-surface);border-radius:var(--radius);font-size:1rem}.auth-loading,.app-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;gap:16px}.auth-login{display:flex;align-items:center;justify-content:center;height:100vh;background:var(--color-bg)}.login-card{text-align:center;padding:48px;background:var(--color-surface);border-radius:var(--radius);box-shadow:var(--shadow-lg)}.login-card h1{font-size:2rem;margin-bottom:8px}.login-card p{color:var(--color-text-muted);margin-bottom:24px}.spinner{width:40px;height:40px;border:4px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:768px){.sidebar{width:60px}.sidebar-label{display:none}.sidebar-link{justify-content:center;padding:12px}.stats-grid{grid-template-columns:1fr 1fr}.reports-grid,.bill-list{grid-template-columns:1fr}.filters-row{flex-direction:column}}