:root{--primary: #8B7CF7;--primary-dark: #6C5CE7;--primary-light: #A29BFE;--primary-bg: rgba(139, 124, 247, .12);--primary-glow: rgba(139, 124, 247, .25);--success: #55EFC4;--success-dark: #00D2A0;--success-bg: rgba(85, 239, 196, .1);--success-glow: rgba(85, 239, 196, .2);--warning: #FDCB6E;--warning-bg: rgba(253, 203, 110, .1);--danger: #FF6B6B;--danger-bg: rgba(255, 107, 107, .1);--bg: #0B0B14;--bg-elevated: #12121E;--bg-secondary: #161625;--card-bg: #16162A;--text: #E8E8F0;--text-secondary: #A8A8C0;--text-muted: #6B6B8A;--border: #252540;--border-light: #1E1E35;--radius-sm: 10px;--radius: 16px;--radius-lg: 24px;--radius-xl: 32px;--radius-full: 9999px;--shadow-xs: 0 1px 2px rgba(0, 0, 0, .2);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .25);--shadow: 0 4px 16px rgba(0, 0, 0, .25), 0 1px 4px rgba(0, 0, 0, .15);--shadow-md: 0 8px 32px rgba(0, 0, 0, .3);--shadow-lg: 0 16px 48px rgba(0, 0, 0, .4);--shadow-primary: 0 4px 24px rgba(108, 92, 231, .25);--shadow-success: 0 4px 24px rgba(85, 239, 196, .2);--transition: .25s cubic-bezier(.4, 0, .2, 1);--transition-spring: .4s cubic-bezier(.34, 1.56, .64, 1)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.5}.app{max-width:430px;margin:0 auto;min-height:100vh;background:var(--bg);position:relative;padding-bottom:100px}.header{background:linear-gradient(135deg,#2d2654,#3d3575,#4a4080);padding:14px 16px 16px;position:sticky;top:0;z-index:50;box-shadow:0 4px 20px #0000004d}.header-top{display:flex;justify-content:space-between;align-items:center}.header-brand{display:flex;align-items:center;gap:12px}.header-logo{width:34px;height:34px;background:#ffffff1f;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:14px;letter-spacing:-1px;border:1px solid rgba(255,255,255,.1)}.header h1{font-size:17px;font-weight:800;letter-spacing:-.5px;color:#fff}.header-subtitle{font-size:12px;color:#ffffffb3;font-weight:500;display:flex;align-items:center;gap:6px}.header .logout-btn{background:#ffffff1a;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.15);color:#fff;padding:6px 14px;border-radius:var(--radius-full);font-size:12px;font-weight:600;cursor:pointer;transition:all var(--transition);font-family:inherit}.header 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#0000004d;position:relative;overflow:hidden}.period-card:before{content:"";position:absolute;top:-50%;right:-30%;width:200px;height:200px;border-radius:50%;background:#8b7cf71a}.period-card:after{content:"";position:absolute;bottom:-40%;left:-20%;width:160px;height:160px;border-radius:50%;background:#8b7cf70f}.period-card .period-label{font-size:11px;font-weight:700;opacity:.7;text-transform:uppercase;letter-spacing:1.5px;position:relative;z-index:1}.period-card .period-value{font-size:24px;font-weight:900;letter-spacing:-.8px;margin:4px 0 2px;position:relative;z-index:1}.period-card .period-flat{font-size:13px;opacity:.7;font-weight:500;position:relative;z-index:1}.collection-progress{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:12px;position:relative;z-index:1}.collection-progress 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var(--transition)}.member-item:last-child{border-bottom:none}.member-avatar{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:14px;margin-right:10px;flex-shrink:0;box-shadow:0 2px 8px 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14px;border-radius:var(--radius-sm)}.member-amount.pending{color:var(--warning);background:var(--warning-bg)}.member-amount.paid{color:var(--success);background:var(--success-bg)}.member-status-badge{display:flex;align-items:center;gap:5px;font-size:12px;font-weight:700;padding:6px 12px;border-radius:var(--radius-sm);flex-shrink:0}.member-status-badge.status-pending{color:var(--warning);background:var(--warning-bg)}.member-status-badge.status-paid{color:var(--success);background:var(--success-bg)}.member-status-badge.status-owner{color:var(--warning);background:var(--warning-bg)}.member-pills{display:flex;flex-wrap:wrap;gap:6px;margin-top:4px;align-items:center}.pills-prefix{font-size:11px;font-weight:700;color:var(--text-muted)}.status-pill{display:inline-flex;align-items:center;gap:4px;padding:3px 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var(--success-glow)}.split-dot.dot-pending{background:var(--warning);box-shadow:0 0 6px #fdcb6e4d}.history-row{display:flex;justify-content:space-between;align-items:center;padding:14px 0;border-bottom:1px solid var(--border)}.history-row:last-child{border-bottom:none}.charge-item.charge-complete{border-color:#55efc433;background:linear-gradient(135deg,#55efc408,#55efc414)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:11px 22px;border-radius:12px;font-size:14px;font-weight:700;border:none;cursor:pointer;transition:all var(--transition);width:100%;font-family:inherit;letter-spacing:-.2px;position:relative;overflow:hidden}.btn:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,#ffffff14,#fff0);pointer-events:none}.btn:active{transform:scale(.97)}.btn-primary{background:linear-gradient(135deg,#6c5ce7,#8b7cf7);color:#fff;box-shadow:var(--shadow-primary)}.btn-primary:hover{box-shadow:0 6px 28px #6c5ce759;transform:translateY(-1px)}.btn-primary:disabled{background:linear-gradient(135deg,#3d3560,#4a4080);box-shadow:none;cursor:not-allowed;transform:none;opacity:.6}.btn-success{background:linear-gradient(135deg,#00b894,#55efc4);color:#0b0b14;font-weight:800;box-shadow:var(--shadow-success)}.btn-outline{background:var(--card-bg);color:var(--text-secondary);border:2px solid var(--border)}.btn-outline:after{display:none}.btn-outline:hover{border-color:var(--primary);color:var(--primary-light);background:var(--primary-bg);transform:translateY(-1px)}.btn-sm{padding:10px 20px;font-size:13px;width:auto;border-radius:12px}.form-group{margin-bottom:18px}.form-group label{display:block;font-size:13px;font-weight:700;color:var(--text-secondary);margin-bottom:8px;letter-spacing:-.1px}.form-group input,.form-group select{width:100%;padding:14px 18px;border:2px solid var(--border);border-radius:14px;font-size:15px;font-family:inherit;transition:all var(--transition);background:var(--bg-elevated);color:var(--text);font-weight:500}.form-group input::placeholder{color:var(--text-muted);font-weight:400}.form-group input:focus,.form-group select:focus{outline:none;border-color:var(--primary);background:var(--bg-secondary);box-shadow:0 0 0 4px var(--primary-glow)}.badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:var(--radius-full);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.badge-pending{background:var(--warning-bg);color:var(--warning)}.badge-paid{background:var(--success-bg);color:var(--success)}.badge-overdue{background:var(--danger-bg);color:var(--danger)}.badge-draft{background:var(--bg-secondary);color:var(--text-muted)}.badge-confirmed{background:var(--primary-bg);color:var(--primary-light)}.charge-item{background:var(--card-bg);border-radius:var(--radius);padding:20px 22px;margin:0 16px 12px;box-shadow:var(--shadow-xs);border:1px solid var(--border);transition:all var(--transition)}.charge-item:hover{box-shadow:var(--shadow-sm);transform:translateY(-1px)}.charge-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:4px}.charge-period{font-weight:800;font-size:17px;letter-spacing:-.5px}.charge-amount{font-weight:900;font-size:20px;color:var(--primary-light);letter-spacing:-.5px}.charge-splits{margin-top:14px;padding-top:14px;border-top:1px solid var(--border)}.split-row{display:flex;justify-content:space-between;align-items:center;padding:10px 0;font-size:14px;color:var(--text-secondary)}.split-row strong{color:var(--text);font-weight:700}.bill-card{display:flex;align-items:center;gap:14px;background:var(--card-bg);border-radius:var(--radius);padding:16px 18px;margin:0 16px 10px;box-shadow:var(--shadow-xs);border:1px solid var(--border);transition:all var(--transition);animation:fadeInUp .3s ease 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8px;border-radius:var(--radius-full);background:var(--primary-bg);color:var(--primary-light)}.processing-indicator{display:flex;align-items:center;gap:12px;padding:16px 20px;margin:0 16px 12px;background:var(--card-bg);border-radius:var(--radius);border:1px solid var(--border);font-size:13px;font-weight:600;color:var(--text-secondary)}.processing-pulse{width:10px;height:10px;border-radius:50%;background:var(--primary-light);animation:pulse 1.2s ease-in-out infinite}@keyframes pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.8)}}.trend-card{display:flex;align-items:center;justify-content:space-between;background:var(--card-bg);border-radius:var(--radius);padding:18px 22px;margin:0 16px;box-shadow:var(--shadow-xs);border:1px solid var(--border)}.trend-left{display:flex;align-items:center;gap:12px}.trend-icon-circle{width:42px;height:42px;border-radius:14px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.trend-icon-circle.trend-up{background:var(--danger-bg);color:var(--danger)}.trend-icon-circle.trend-down{background:var(--success-bg);color:var(--success)}.trend-icon-circle.trend-flat{background:var(--bg-secondary);color:var(--text-muted)}.trend-value{font-size:28px;font-weight:900;letter-spacing:-1px;color:var(--text)}.trend-value.trend-up-text{color:var(--danger)}.trend-value.trend-down-text{color:var(--success)}.breakdown-row{display:flex;justify-content:space-between;align-items:center;padding:14px 0;border-bottom:1px solid var(--border);animation:fadeInUp .3s ease 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h2{font-size:16px;font-weight:700;margin-bottom:20px;text-align:center;color:var(--text-secondary)}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:430px;background:#0a0a18fa;backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-top:1px solid rgba(139,124,247,.12);display:flex;padding:6px 12px calc(8px + env(safe-area-inset-bottom,0px));z-index:9999}.nav-item{flex:1;display:flex;flex-direction:column;align-items:center;gap:3px;padding:8px 0;color:var(--text-muted);text-decoration:none;font-size:10px;font-weight:600;cursor:pointer;border:none;background:none;transition:all var(--transition);font-family:inherit;position:relative}.nav-item.active{color:var(--primary-light)}.nav-item.active:before{content:"";position:absolute;top:0;left:50%;transform:translate(-50%);width:28px;height:3px;background:linear-gradient(90deg,var(--primary),var(--primary-light));border-radius:0 0 3px 3px}.nav-item svg{width:20px;height:20px;stroke-width:2;transition:all var(--transition)}.nav-item.active svg{stroke-width:2.5}.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:80px 20px;color:var(--text-muted);font-size:14px;font-weight:500}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--primary-light);border-radius:50%;animation:spin .7s linear infinite;margin-bottom:16px}@keyframes spin{to{transform:rotate(360deg)}}.error-msg{text-align:center;padding:40px 20px;color:var(--danger);font-weight:600;font-size:14px}.skeleton-card{background:linear-gradient(90deg,var(--border) 25%,#2A2A45 37%,var(--border) 63%);background-size:400% 100%;animation:skeletonShimmer 1.4s ease infinite;border-radius:var(--radius)}@keyframes skeletonShimmer{0%{background-position:100% 50%}to{background-position:0% 50%}}.empty-state{text-align:center;padding:56px 24px;color:var(--text-muted)}.empty-state .icon{font-size:48px;margin-bottom:16px;filter:grayscale(.3)}.empty-state p{font-size:15px;line-height:1.5;font-weight:500}.empty-state p+p{margin-top:4px;font-size:13px;font-weight:400}.upload-area{border:2px dashed var(--border);border-radius:var(--radius);padding:32px 24px;text-align:center;cursor:pointer;transition:all var(--transition);margin:12px 16px;background:var(--card-bg)}.upload-area:hover{border-color:var(--primary);background:var(--primary-bg);transform:translateY(-2px);box-shadow:var(--shadow-sm)}.upload-area .icon{font-size:36px;margin-bottom:10px}.upload-area p{color:var(--text-secondary);font-size:14px}.upload-area p strong{color:var(--primary-light)}.upload-area p+p{color:var(--text-muted);font-size:12px;margin-top:4px}.toast{position:fixed;top:20px;left:50%;transform:translate(-50%);background:var(--primary-dark);color:#fff;padding:14px 28px;border-radius:var(--radius-full);font-size:14px;font-weight:600;z-index:999;box-shadow:var(--shadow-lg);animation:toastIn .4s var(--transition-spring);max-width:calc(100% - 40px)}@keyframes toastIn{0%{opacity:0;transform:translate(-50%) translateY(-16px) scale(.9)}to{opacity:1;transform:translate(-50%) translateY(0) scale(1)}}.action-bar{padding:4px 16px 14px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000b3;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);display:flex;align-items:flex-end;justify-content:center;z-index:200;animation:fadeIn .2s ease}.modal-content{background:var(--bg-elevated);border-radius:var(--radius-xl) var(--radius-xl) 0 0;padding:32px 28px calc(32px + env(safe-area-inset-bottom,0px));width:100%;max-width:430px;max-height:85vh;overflow-y:auto;animation:slideUp .35s cubic-bezier(.34,1.56,.64,1);border:1px solid var(--border);border-bottom:none}.modal-content:before{content:"";display:block;width:40px;height:4px;border-radius:2px;background:var(--border);margin:0 auto 20px}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{transform:translateY(100%)}to{transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.card,.stat-card,.charge-item,.period-card{animation:fadeInUp .4s ease both}.stats-row .stat-card:nth-child(2){animation-delay:.05s}.charge-item:nth-child(2){animation-delay:.05s}.charge-item:nth-child(3){animation-delay:.1s}.divider{height:1px;background:var(--border);margin:8px 16px}::-webkit-scrollbar{width:4px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.tabs{display:flex;gap:0;margin-bottom:20px;border-radius:var(--radius-sm);overflow:hidden;background:var(--bg-secondary);padding:3px}.tab-btn{flex:1;padding:10px 16px;border:none;background:transparent;font-family:inherit;font-size:14px;font-weight:600;color:var(--text-muted);cursor:pointer;border-radius:8px;transition:all var(--transition)}.tab-btn.active{background:var(--card-bg);color:var(--primary-light);box-shadow:var(--shadow-xs)}.activity-row{display:flex;align-items:center;gap:12px;padding:12px 16px;margin:0 16px 2px;border-radius:12px;background:var(--card-bg);animation:fadeInUp .3s ease both;transition:background .15s ease}.activity-row:hover{background:var(--bg-secondary)}.activity-icon{width:36px;height:36px;min-width:36px;min-height:36px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.activity-body{flex:1;min-width:0}.activity-label{font-weight:600;font-size:13.5px;color:var(--text);line-height:1.3}.activity-meta{display:flex;align-items:center;gap:4px;font-size:12px;color:var(--text-muted);margin-top:2px}.activity-dot{color:var(--border)}.activity-time{font-size:11px;color:var(--text-muted);white-space:nowrap;flex-shrink:0;font-weight:500}@media (min-width: 768px){body{background:#06060d;min-height:100vh}.app{margin:24px auto;border-radius:32px;box-shadow:0 20px 60px #0006,0 8px 24px #0000004d,inset 0 0 0 1px #8b7cf714;min-height:calc(100vh - 48px);overflow:hidden;padding-bottom:80px;border:1px solid rgba(139,124,247,.06)}.header{border-radius:32px 32px 0 0}.bottom-nav{border-radius:0 0 32px 32px;max-width:430px}.modal-overlay{align-items:center}.modal-content{border-radius:var(--radius-xl);max-width:420px;max-height:80vh;border:1px solid var(--border)}.modal-content:before{display:none}.login-page{background:transparent}.login-card{box-shadow:var(--shadow-lg)}.toast{max-width:400px}}@media (min-width: 1200px){body{display:flex;justify-content:center;align-items:flex-start;gap:60px;padding:24px;background:#06060d}body:before{content:"";position:fixed;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse at 20% 50%,rgba(108,92,231,.06) 0%,transparent 50%),radial-gradient(ellipse at 80% 20%,rgba(162,155,254,.04) 0%,transparent 40%);z-index:-1}.app{margin:0;flex-shrink:0}}