:root{--primary:#e65100;--primary-light:#ff833a;--primary-dark:#ac1900;--secondary:#2e7d32;--secondary-light:#60ad5e;--danger:#d32f2f;--warning:#f57c00;--success:#2e7d32;--bg:#f5f5f5;--bg-card:#fff;--text:#212121;--text-light:#757575;--border:#e0e0e0;--shadow:0 2px 8px #0000001a;--radius:8px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6}.auth-container{background:linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.auth-card{background:#fff;border-radius:16px;width:100%;max-width:420px;padding:40px;box-shadow:0 20px 60px #0000004d}.auth-header{text-align:center;margin-bottom:30px}.auth-header h1{color:var(--primary);margin-bottom:8px;font-size:24px}.auth-header p{color:var(--text-light)}.auth-footer{text-align:center;color:var(--text-light);margin-top:20px}.auth-footer a{color:var(--primary);font-weight:600;text-decoration:none}.form-group{margin-bottom:16px}.form-group label{color:var(--text);margin-bottom:6px;font-size:14px;font-weight:500;display:block}.form-group input,.form-group select,.form-group textarea{border:2px solid var(--border);border-radius:var(--radius);background:#fff;width:100%;padding:10px 14px;font-size:14px;transition:border-color .2s}.form-group input:focus,.form-group select:focus{border-color:var(--primary);outline:none}.form-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;display:grid}.full-width{grid-column:1/-1}.form-actions{align-items:end;gap:10px;display:flex}.inline-form{background:var(--bg);border-radius:var(--radius);margin-bottom:16px;padding:16px}.btn{border-radius:var(--radius);cursor:pointer;border:none;align-items:center;gap:6px;padding:10px 20px;font-size:14px;font-weight:600;text-decoration:none;transition:all 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a{color:var(--primary);font-size:20px;font-weight:700;text-decoration:none}.mobile-toggle{cursor:pointer;color:var(--text);background:0 0;border:none;font-size:24px;display:none}.navbar-links{gap:4px;display:flex}.nav-link{border-radius:var(--radius);color:var(--text-light);align-items:center;gap:6px;padding:8px 14px;font-size:14px;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.nav-link:hover{background:var(--bg);color:var(--primary)}.nav-link.active{color:var(--primary);background:#fff3e0}.navbar-user{align-items:center;gap:12px;display:flex}.user-name{font-size:14px;font-weight:600}.user-role{color:var(--primary);background:#fff3e0;border-radius:12px;padding:2px 8px;font-size:11px;font-weight:600}.btn-logout{border:1px solid var(--border);border-radius:var(--radius);color:var(--text-light);cursor:pointer;background:0 0;align-items:center;gap:4px;padding:6px 12px;font-size:13px;transition:all 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20px;font-size:14px;font-weight:500;transition:all .2s}.settings-tab.active{color:var(--primary);border-bottom-color:var(--primary)}.settings-tab:hover{color:var(--primary)}.settings-list{flex-direction:column;gap:16px;display:flex}.settings-item{background:var(--bg);border-radius:var(--radius);justify-content:space-between;align-items:center;padding:16px;display:flex}.settings-item-info h3{margin-bottom:4px;font-size:15px}.settings-item-info p{color:var(--text-light);font-size:13px}.about-section{align-items:flex-start;gap:24px;display:flex}.about-image{object-fit:cover;border-radius:var(--radius);width:200px;height:150px}.about-info h3{color:var(--primary);margin-bottom:8px;font-size:20px}.about-info p{color:var(--text-light);margin-bottom:12px;line-height:1.6}.about-info ul{margin:12px 0;padding-left:20px}.about-info ul li{color:var(--text);margin-bottom:6px;font-size:14px}.about-version{color:var(--text-light);margin-top:12px;font-size:12px}@media 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(width<=480px){.stats-grid{grid-template-columns:1fr}.stat-card{padding:16px}.stat-value{font-size:20px}.report-summary{grid-template-columns:1fr}}.signup-toggle-row{justify-content:space-between;align-items:center;gap:16px;padding:16px 20px;display:flex}.signup-toggle-info{flex:1}.signup-toggle-title{color:var(--text);margin-bottom:4px;font-size:15px;font-weight:600}.signup-toggle-desc{color:var(--text-light);font-size:13px}.btn-toggle{cursor:pointer;border:none;border-radius:20px;min-width:60px;padding:8px 16px;font-size:13px;font-weight:700;transition:all .2s}.btn-toggle-on{background:var(--success);color:#fff}.btn-toggle-off{background:var(--danger);color:#fff}.signup-disabled-message{text-align:center;padding:24px 16px}.signup-disabled-message .disabled-icon{margin-bottom:12px;font-size:48px}.signup-disabled-message p{color:var(--text-light);margin-bottom:8px;font-size:14px}.expense-tracker-promo{color:#4a148c;cursor:pointer;background:#f3e5f5;margin-bottom:24px;transition:transform .2s,box-shadow .2s}.expense-tracker-promo:hover{transform:translateY(-2px);box-shadow:0 8px 24px #7b1fa233}.expense-tracker-content{align-items:center;gap:20px;display:flex}.expense-tracker-icon{color:#6a1b9a;background:#e1bee7;border-radius:12px;justify-content:center;align-items:center;padding:16px;display:flex}.expense-tracker-text{flex:1}.expense-tracker-text h2{color:#4a148c;margin-bottom:4px;font-size:22px}.expense-tracker-text p{color:#6a1b9a;margin:0;font-size:14px}.expense-tracker-arrow{color:#6a1b9a;font-size:28px;font-weight:700}.expense-groups-grid{grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px;display:grid}.expense-group-card{box-shadow:var(--shadow);cursor:pointer;background:#fff;border:2px solid #0000;border-radius:12px;padding:20px;transition:all .2s}.expense-group-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:0 8px 24px #00000026}.expense-group-header{align-items:center;gap:12px;margin-bottom:16px;display:flex}.friend-avatar{background:linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:50px;height:50px;font-size:22px;font-weight:700;display:flex}.friend-info{flex:1}.friend-info h3{color:var(--text);margin-bottom:2px;font-size:18px}.transaction-count{color:var(--text-light);margin:0;font-size:12px}.btn-icon{cursor:pointer;background:0 0;border:none;border-radius:6px;justify-content:center;align-items:center;padding:8px;transition:all .2s;display:flex}.btn-icon:hover{background:#0000000d}.btn-icon.btn-danger:hover{color:var(--danger);background:#d32f2f1a}.expense-amounts{border-top:1px solid var(--border);border-bottom:1px solid var(--border);justify-content:space-around;margin-bottom:16px;padding:16px 0;display:flex}.amount-item{flex-direction:column;align-items:center;gap:4px;display:flex}.amount-label{color:var(--text-light);font-size:12px}.amount-value{font-size:16px;font-weight:700}.balance-summary{border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:12px;font-size:14px;font-weight:600;display:flex}.balance-summary.balance-success{color:var(--success);background:#2e7d321a}.balance-summary.balance-info{color:#1976d2;background:#2196f31a}.balance-summary.balance-warning{color:var(--warning);background:#f57c001a}.balance-icon{font-size:18px}.expense-summary-card{background:linear-gradient(135deg,#f5f5f5 0%,#e0e0e0 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.2s}.filter-chip:hover{border-color:var(--primary);color:var(--primary)}.filter-chip.active{background:var(--primary);border-color:var(--primary);color:#fff}.expenses-list{flex-direction:column;gap:12px;display:flex}.expense-item{box-shadow:var(--shadow);background:#fff;border-radius:12px;align-items:center;gap:16px;padding:16px;transition:all .2s;display:flex}.expense-item:hover{box-shadow:0 4px 16px #0000001f}.expense-icon{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;font-size:18px;display:flex}.expense-icon.icon-success{color:var(--success);background:#2e7d321a}.expense-icon.icon-danger{color:var(--danger);background:#d32f2f1a}.expense-details{flex:1}.expense-details h4{color:var(--text);margin-bottom:2px;font-size:16px}.expense-date{color:var(--text-light);margin:0;font-size:12px}.expense-image-indicator{color:var(--primary);align-items:center;gap:4px;margin:4px 0 0;font-size:11px;display:flex}.expense-amount-actions{align-items:center;gap:12px;display:flex}.expense-amount{text-align:right;min-width:80px;font-size:18px;font-weight:700}.modal-overlay{z-index:1000;background:#00000080;justify-content:center;align-items:center;padding:20px;animation:.2s fadeIn;display:flex;position:fixed;inset:0}.modal-content{background:#fff;border-radius:12px;width:100%;max-width:500px;max-height:90vh;animation:.3s slideUp;overflow-y:auto;box-shadow:0 20px 60px #0000004d}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.modal-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:20px 24px;display:flex}.modal-header h2{color:var(--text);margin:0;font-size:20px}.modal-close{cursor:pointer;color:var(--text-light);background:0 0;border:none;border-radius:6px;justify-content:center;align-items:center;width:32px;height:32px;font-size:28px;transition:all .2s;display:flex}.modal-close:hover{color:var(--text);background:#0000000d}.modal-content form{padding:24px}.modal-actions{justify-content:flex-end;gap:12px;margin-top:24px;display:flex}@media (width<=768px){.expense-groups-grid{grid-template-columns:1fr}.expense-tracker-content{gap:12px}.expense-tracker-icon{padding:12px}.expense-tracker-text h2{font-size:18px}.expense-summary-amounts{flex-direction:column;gap:16px}.summary-divider{width:100%;height:1px}.expense-item{flex-wrap:wrap}.expense-amount-actions{justify-content:space-between;width:100%}}