:root{--bg: #f8f9fa;--surface: #ffffff;--surface-2: #f1f3f5;--border: #e9ecef;--border-strong: #ced4da;--text: #212529;--text-2: #495057;--text-muted: #868e96;--accent: #2f9e44;--accent-bg: #ebfbee;--accent-border: #b2f2bb;--danger: #e03131;--danger-bg: #fff5f5;--danger-border: #ffc9c9;--warning: #f08c00;--warning-bg: #fff9db;--warning-border: #ffec99;--blue: #1971c2;--blue-bg: #e7f5ff;--blue-border: #a5d8ff;--radius-sm: 6px;--radius: 10px;--radius-lg: 14px;--shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);--shadow: 0 4px 12px rgba(0,0,0,.07), 0 1px 3px rgba(0,0,0,.04);--shadow-lg: 0 10px 30px rgba(0,0,0,.1), 0 4px 8px rgba(0,0,0,.05)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;font-size:14px;-webkit-font-smoothing:antialiased}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:3px}.app-shell{display:flex;min-height:100vh}.sidebar{width:240px;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;z-index:50;padding:0}.sidebar-brand{padding:20px 20px 16px;border-bottom:1px solid var(--border)}.sidebar-brand h1{font-size:16px;font-weight:700;color:var(--text);letter-spacing:-.3px}.sidebar-brand p{font-size:11px;color:var(--text-muted);margin-top:2px}.sidebar-nav{padding:12px 10px;flex:1}.nav-section-label{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.8px;color:var(--text-muted);padding:10px 10px 4px}.nav-item{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:var(--radius-sm);cursor:pointer;font-weight:500;font-size:13.5px;color:var(--text-2);transition:all .15s ease;background:none;border:none;width:100%;text-align:left;text-decoration:none}.nav-item:hover{background:var(--surface-2);color:var(--text)}.nav-item.active{background:var(--accent-bg);color:var(--accent);font-weight:600}.nav-item .icon{font-size:16px;width:20px;text-align:center}.main-content{margin-left:240px;flex:1;padding:32px;max-width:calc(100vw - 240px)}.page-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:28px}.page-header h2{font-size:22px;font-weight:700;letter-spacing:-.4px}.page-header p{font-size:13px;color:var(--text-muted);margin-top:3px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:28px}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm)}.stat-card .label{font-size:12px;font-weight:500;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted)}.stat-card .value{font-size:26px;font-weight:700;letter-spacing:-.5px;margin-top:6px}.stat-card .sub{font-size:12px;color:var(--text-muted);margin-top:4px}.stat-card.green .value{color:var(--accent)}.stat-card.red .value{color:var(--danger)}.stat-card.blue .value{color:var(--blue)}.alert-card{border-radius:var(--radius);padding:16px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px;border:1px solid}.alert-card.overdue{background:var(--danger-bg);border-color:var(--danger-border)}.alert-card.due-today{background:var(--warning-bg);border-color:var(--warning-border)}.alert-card.upcoming{background:var(--blue-bg);border-color:var(--blue-border)}.alert-card .alert-title{font-weight:600;font-size:14px}.alert-card .alert-sub{font-size:12px;color:var(--text-2);margin-top:2px}.alert-card .alert-amount{font-weight:700;font-size:18px;white-space:nowrap}.table-wrap{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm)}table{width:100%;border-collapse:collapse}thead th{background:var(--surface-2);padding:11px 16px;text-align:left;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);border-bottom:1px solid var(--border)}tbody tr{border-bottom:1px solid var(--border);transition:background .1s}tbody tr:last-child{border-bottom:none}tbody tr:hover{background:var(--surface-2)}tbody td{padding:13px 16px;font-size:13.5px;vertical-align:middle}.td-name{font-weight:600;color:var(--text)}.td-sub{font-size:11px;color:var(--text-muted);margin-top:2px}.badge{display:inline-flex;align-items:center;padding:3px 9px;border-radius:9999px;font-size:11px;font-weight:600;line-height:1}.badge-green{background:var(--accent-bg);color:var(--accent);border:1px solid var(--accent-border)}.badge-red{background:var(--danger-bg);color:var(--danger);border:1px solid var(--danger-border)}.badge-yellow{background:var(--warning-bg);color:var(--warning);border:1px solid var(--warning-border)}.badge-blue{background:var(--blue-bg);color:var(--blue);border:1px solid var(--blue-border)}.badge-gray{background:var(--surface-2);color:var(--text-2);border:1px solid var(--border)}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:var(--radius-sm);font-family:inherit;font-size:13px;font-weight:600;cursor:pointer;border:none;transition:all .15s ease;white-space:nowrap}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--text);color:#fff}.btn-primary:hover:not(:disabled){background:#000}.btn-accent{background:var(--accent);color:#fff}.btn-accent:hover:not(:disabled){background:#27843a}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:#c42d2d}.btn-ghost{background:transparent;color:var(--text-2);border:1px solid var(--border)}.btn-ghost:hover:not(:disabled){background:var(--surface-2)}.btn-sm{padding:5px 10px;font-size:12px}.btn-icon{padding:7px;border-radius:var(--radius-sm)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000059;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);display:flex;align-items:center;justify-content:center;z-index:200;padding:20px;animation:fadeIn .15s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal-box{background:var(--surface);border-radius:var(--radius-lg);padding:28px;width:100%;max-width:480px;box-shadow:var(--shadow-lg);animation:slideUp .2s ease}@keyframes slideUp{0%{transform:translateY(12px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}.modal-header h3{font-size:17px;font-weight:700}.modal-close{background:none;border:none;cursor:pointer;font-size:20px;color:var(--text-muted);line-height:1;padding:2px;border-radius:4px}.modal-close:hover{color:var(--text);background:var(--surface-2)}.form-group{margin-bottom:16px}.form-label{display:block;font-size:12px;font-weight:600;color:var(--text-2);margin-bottom:6px}.form-input,.form-select,.form-textarea{width:100%;padding:9px 12px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);font-family:inherit;font-size:13.5px;color:var(--text);background:var(--surface);transition:border-color .15s,box-shadow .15s;outline:none}.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #2f9e441f}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}.form-footer{display:flex;gap:10px;justify-content:flex-end;margin-top:22px;padding-top:18px;border-top:1px solid var(--border)}.ledger-section{margin-top:16px;padding-top:16px;border-top:1px dashed var(--border)}.ledger-section h4{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-bottom:10px}.ledger-row{display:flex;align-items:center;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--border);font-size:13px}.ledger-row:last-child{border-bottom:none}.ledger-date{color:var(--text-muted);font-size:12px}.ledger-amount{font-weight:600;color:var(--accent)}.ledger-note{font-size:12px;color:var(--text-2)}.empty-state{text-align:center;padding:52px 20px;color:var(--text-muted)}.empty-state .empty-icon{font-size:36px;margin-bottom:12px}.empty-state p{font-size:14px}.empty-state .empty-sub{font-size:12px;margin-top:6px}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.section-title{font-size:16px;font-weight:700}@media(max-width:900px){.sidebar{display:none}.main-content{margin-left:0;max-width:100vw;padding:20px}.stats-grid{grid-template-columns:1fr 1fr}}@media(max-width:600px){.stats-grid,.form-row{grid-template-columns:1fr}}