:root{--bg-gradient-start: #0A1128;--bg-gradient-end: #1B2845;--primary: #1B2845;--primary-dark: #0A1128;--secondary: #7B68EE;--accent: #00D9C0;--text-primary: #FFFFFF;--text-secondary: #E0E0E0;--text-muted: #9E9E9E;--success: #00C853;--error: #FF3D00;--warning: #FFC107;--surface: rgba(255, 255, 255, .05);--surface-highlight: rgba(255, 255, 255, .1);--border: rgba(255, 255, 255, .1);--font-body: "Inter", sans-serif;--font-heading: "Outfit", sans-serif;--transition-fast: .15s ease;--transition-normal: .3s ease}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:var(--font-body);color:var(--text-primary);background:linear-gradient(135deg,var(--bg-gradient-start),var(--bg-gradient-end));background-attachment:fixed;line-height:1.5;-webkit-font-smoothing:antialiased}#app{display:flex;flex-direction:column;min-height:100vh}#app-content{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:20px;display:flex;flex-direction:column}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);font-weight:600;margin-bottom:.5em;color:var(--text-primary)}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}h4{font-size:1.25rem}p{margin-bottom:1rem;color:var(--text-secondary)}a{color:var(--accent);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:#33e8d2}.hidden{display:none!important}.text-center{text-align:center}.text-muted{color:var(--text-muted)}.text-success{color:var(--success)}.text-error{color:var(--error)}.text-accent{color:var(--accent)}.flex-between{display:flex;justify-content:space-between;align-items:center}.flex-center{display:flex;justify-content:center;align-items:center}.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mb-4{margin-bottom:2rem}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--primary-dark)}::-webkit-scrollbar-thumb{background:var(--surface-highlight);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--border)}.glass-card{background:var(--surface);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:0 8px 32px #0003;transition:transform var(--transition-normal),box-shadow var(--transition-normal)}.glass-card.interactive:hover{transform:translateY(-4px);box-shadow:0 12px 40px #0000004d;border-color:#fff3;cursor:pointer}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:12px;font-family:var(--font-body);font-weight:600;font-size:1rem;cursor:pointer;border:none;transition:all var(--transition-fast);text-decoration:none}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:linear-gradient(135deg,#00d9c0,#00b4a0);color:#000;box-shadow:0 4px 15px #00d9c04d}.btn-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #00d9c066;color:#000}.btn-secondary{background:linear-gradient(135deg,#7b68ee,#6a5acd);color:#fff;box-shadow:0 4px 15px #7b68ee4d}.btn-secondary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 20px #7b68ee66}.btn-outline{background:transparent;color:var(--accent);border:1.5px solid var(--accent)}.btn-outline:hover:not(:disabled){background:#00d9c01a}.btn-danger{background:#ff3d001a;color:var(--error);border:1px solid var(--error)}.btn-danger:hover:not(:disabled){background:var(--error);color:#fff}.btn-block{width:100%}.form-group{margin-bottom:20px}.form-label{display:block;margin-bottom:8px;font-weight:500;color:var(--text-secondary)}.form-control{width:100%;padding:14px 16px;background:#0003;border:1px solid var(--border);border-radius:12px;color:var(--text-primary);font-family:var(--font-body);font-size:1rem;transition:all var(--transition-fast)}.form-control:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px #00d9c033;background:#0000004d}.form-control::placeholder{color:var(--text-muted)}select.form-control{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center}.navbar{background:#0a1128cc;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border);padding:16px 20px;position:sticky;top:0;z-index:100}.navbar-container{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.nav-brand{font-family:var(--font-heading);font-size:1.5rem;font-weight:700;background:linear-gradient(135deg,#00d9c0,#7b68ee);-webkit-background-clip:text;-webkit-text-fill-color:transparent;text-decoration:none;display:flex;align-items:center;gap:10px}.nav-links{display:flex;gap:20px;align-items:center}.nav-link{color:var(--text-secondary);font-weight:500;padding:8px 12px;border-radius:8px}.nav-link:hover,.nav-link.active{color:var(--accent);background:#00d9c01a}.avatar{width:40px;height:40px;border-radius:50%;background:#7b68ee33;color:var(--secondary);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem;border:1px solid rgba(123,104,238,.3)}.avatar.sm{width:32px;height:32px;font-size:1rem}.avatar.lg{width:64px;height:64px;font-size:2rem}.badge{padding:4px 10px;border-radius:12px;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.badge.active{background:#00c85326;color:var(--success);border:1px solid rgba(0,200,83,.3)}.badge.closed{background:#ff3d0026;color:var(--error);border:1px solid rgba(255,61,0,.3)}.badge.category{background:#00d9c026;color:var(--accent);border:1px solid rgba(0,217,192,.3)}#modal-container{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px}.modal-backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal-content{position:relative;width:100%;max-width:500px;background:var(--primary);border:1px solid var(--border);border-radius:20px;padding:24px;box-shadow:0 20px 40px #0006;animation:modal-enter .3s cubic-bezier(.175,.885,.32,1.275)}@keyframes modal-enter{0%{opacity:0;transform:scale(.9) translateY(20px)}to{opacity:1;transform:scale(1) translateY(0)}}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.modal-close{background:none;border:none;color:var(--text-muted);font-size:1.5rem;cursor:pointer;transition:color var(--transition-fast)}.modal-close:hover{color:var(--text-primary)}#toast-container{position:fixed;bottom:24px;right:24px;z-index:2000;display:flex;flex-direction:column;gap:10px}.toast{padding:16px 20px;border-radius:12px;background:var(--surface);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border:1px solid var(--border);color:#fff;font-weight:500;display:flex;align-items:center;gap:12px;box-shadow:0 8px 24px #0000004d;animation:toast-slide .3s cubic-bezier(.175,.885,.32,1.275);transform-origin:right}.toast.success{border-left:4px solid var(--success)}.toast.error{border-left:4px solid var(--error)}.toast.info{border-left:4px solid var(--accent)}@keyframes toast-slide{0%{opacity:0;transform:translate(100%)}to{opacity:1;transform:translate(0)}}.loader-container{display:flex;justify-content:center;align-items:center;padding:40px;width:100%}.spinner{width:40px;height:40px;border:4px solid rgba(0,217,192,.2);border-left-color:var(--accent);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.skeleton{background:linear-gradient(90deg,#ffffff08 25%,#ffffff14,#ffffff08 75%);background-size:400% 100%;animation:shimmer 1.5s infinite;border-radius:8px}.skeleton-text{height:16px;margin-bottom:8px;width:100%}.skeleton-text.short{width:60%}.skeleton-avatar{width:40px;height:40px;border-radius:50%}@keyframes shimmer{0%{background-position:100% 0}to{background-position:-100% 0}}.auth-container{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}.auth-card{width:100%;max-width:420px}.auth-header{text-align:center;margin-bottom:30px}.auth-logo{font-size:3rem;background:linear-gradient(135deg,#00d9c0,#7b68ee);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:10px}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:30px;flex-wrap:wrap;gap:16px}.groups-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}.group-card .group-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:15px}.group-card .group-icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,#00d9c033,#7b68ee33);display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:var(--accent)}.group-card .group-meta{display:flex;gap:15px;color:var(--text-muted);font-size:.9rem;margin-top:20px;padding-top:15px;border-top:1px solid var(--border)}.detail-header{text-align:center;padding:40px 20px;background:var(--surface);border-radius:20px;margin-bottom:30px;border:1px solid var(--border)}.invite-code-box{display:inline-flex;align-items:center;gap:10px;background:#0000004d;padding:8px 16px;border-radius:8px;font-family:monospace;font-size:1.2rem;letter-spacing:2px;margin-top:15px}.members-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.member-chip{display:inline-flex;align-items:center;gap:8px;background:#ffffff0d;padding:6px 12px 6px 6px;border-radius:20px;border:1px solid var(--border)}.member-chip .avatar{width:24px;height:24px;font-size:.8rem}.months-list{display:flex;flex-direction:column;gap:15px}.month-item{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;text-decoration:none;color:inherit}.month-item-left{display:flex;align-items:center;gap:15px}.month-icon{width:40px;height:40px;border-radius:10px;background:#7b68ee26;color:var(--secondary);display:flex;align-items:center;justify-content:center}.total-banner{background:linear-gradient(135deg,#00d9c0,#008b8b);border-radius:16px;padding:24px;display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;color:#fff;box-shadow:0 10px 30px #00d9c033}.total-amount{font-size:2rem;font-weight:700;font-family:var(--font-heading)}.entries-list{display:flex;flex-direction:column;gap:12px}.entry-item{display:flex;align-items:center;gap:15px;padding:16px}.entry-details{flex:1}.entry-meta{display:flex;align-items:center;gap:10px;margin-top:4px}.entry-amount{font-size:1.25rem;font-weight:700;color:var(--accent)}.entry-actions{opacity:0;transition:opacity var(--transition-fast)}.entry-item:hover .entry-actions{opacity:1}.settlement-card{display:flex;align-items:center;gap:15px;margin-bottom:12px}.settlement-card .balance-info{flex:1}.settlement-card .net-amount{text-align:right}.settlement-card .net-amount .amount{font-size:1.25rem;font-weight:700}.settlement-card .net-amount .label{font-size:.75rem;text-transform:uppercase;letter-spacing:.5px}.transaction-card{display:flex;align-items:center;margin-bottom:16px}.transaction-step{width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,#00d9c0,#00b4a0);color:#000;display:flex;align-items:center;justify-content:center;font-weight:700;margin-right:16px}.transaction-parties{flex:1;display:flex;align-items:center;justify-content:space-between}.transaction-user{display:flex;flex-direction:column}.transaction-user.from{align-items:flex-start;color:var(--error)}.transaction-user.to{align-items:flex-end;color:var(--success)}.transaction-arrow{display:flex;flex-direction:column;align-items:center;gap:4px;padding:0 15px}.transaction-arrow .amount{background:#00d9c026;color:var(--accent);padding:4px 12px;border-radius:12px;font-weight:700}.summary-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}@media(max-width:768px){.summary-grid{grid-template-columns:1fr}}.summary-item{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid var(--border)}.summary-item:last-child{border-bottom:none}.hero-card{position:relative;background:linear-gradient(135deg,var(--primary),#483D8B);border-radius:24px;padding:30px;color:#fff;overflow:hidden;box-shadow:0 12px 30px #7b68ee4d;display:flex;justify-content:space-between;align-items:center}.hero-content{position:relative;z-index:2}.hero-title{font-size:2rem;font-weight:700;margin-bottom:20px;font-family:Outfit,sans-serif;text-shadow:0 2px 10px rgba(0,0,0,.2)}.hero-subtitle{font-size:.9rem;text-transform:uppercase;letter-spacing:1px;opacity:.8;margin-bottom:5px}.hero-amount{font-size:2.5rem;font-weight:700;font-family:Inter,sans-serif;text-shadow:0 2px 10px rgba(0,0,0,.2)}.hero-bg-icon{position:absolute;right:-20px;bottom:-40px;font-size:10rem;opacity:.1;z-index:1;transform:rotate(-15deg)}.action-bar{display:flex;gap:12px;flex-wrap:wrap}.action-btn{flex:1;min-width:120px;border-radius:16px;display:flex;justify-content:center;align-items:center;gap:8px;padding:14px 20px;font-weight:600;font-size:1rem;transition:transform .2s ease,box-shadow .2s ease}.action-btn:hover{transform:translateY(-2px);box-shadow:0 6px 15px #0000004d}.action-btn.btn-settle{background:#00d9c01a;color:var(--accent);border:1px solid rgba(0,217,192,.3)}.action-btn.btn-summary{background:#ffffff0d;color:var(--text-primary);border:1px solid var(--border)}.timeline{position:relative;padding-left:10px}.timeline:before{content:"";position:absolute;top:0;bottom:0;left:20px;width:2px;background:var(--border);z-index:0}.timeline-group{margin-bottom:30px;position:relative;z-index:1}.timeline-date{margin-bottom:15px;padding-left:45px;position:relative}.timeline-date:before{content:"";position:absolute;left:5px;top:50%;transform:translateY(-50%);width:12px;height:12px;border-radius:50%;background:var(--primary);border:3px solid var(--surface);box-shadow:0 0 0 2px var(--primary)}.date-chip{display:inline-block;background:var(--surface-light);padding:6px 14px;border-radius:20px;font-size:.85rem;font-weight:600;color:var(--text-secondary);border:1px solid var(--border)}.timeline-items{padding-left:45px;display:flex;flex-direction:column;gap:15px}.timeline-entry{display:flex;align-items:center;padding:16px 20px;border-radius:16px;transition:all .25s ease}.timeline-entry:hover{transform:translate(5px) scale(1.01);box-shadow:0 8px 25px #0006;border-color:#ffffff26}.timeline-entry .avatar{width:48px;height:48px;font-size:1.2rem;border-width:2px}.timeline-entry .entry-details{flex:1;padding:0 15px}.timeline-entry .entry-desc{font-size:1.15rem;font-weight:600;color:var(--text-primary);margin-bottom:6px}.timeline-entry .entry-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.timeline-entry .entry-author{font-size:.85rem;color:var(--text-muted)}.timeline-entry .entry-right{display:flex;align-items:center;gap:15px;text-align:right}.timeline-entry .entry-amount{font-size:1.25rem;font-weight:700;color:var(--text-primary);font-family:Outfit,sans-serif}.btn-icon{background:transparent;border:none;color:var(--text-muted);width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .2s}.btn-icon:hover{background:#ff525226;color:var(--error)}.empty-state{text-align:center;padding:60px 20px;background:#ffffff05;border:1px dashed var(--border);border-radius:20px}.empty-icon-wrapper{width:80px;height:80px;background:#7b68ee1a;color:var(--primary);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:2.5rem;margin:0 auto 20px}.empty-state h4{font-size:1.4rem;margin-bottom:10px;color:var(--text-primary)}.empty-state p{color:var(--text-muted);max-width:300px;margin:0 auto}