:root{--color-bg:#f4f6f8;--color-surface:#fff;--color-border:#e2e5ea;--color-text:#1a1d24;--color-text-muted:#6b7280;--color-primary:#2f6fed;--color-primary-dark:#1e56c9;--color-nav-bg:#1f2430;--color-nav-text:#cdd3de;--color-nav-text-active:#fff;--color-danger:#dc2626;--color-success:#16a34a;--radius:8px;--shadow-sm:0 1px 2px #1018280f;--shadow-md:0 4px 16px #1018281f}*{box-sizing:border-box}html,body,#root{height:100%}body{color:var(--color-text);background:var(--color-bg);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}button,input,select,textarea{font-family:inherit;font-size:14px}.app-shell{flex-direction:column;height:100vh;display:flex}.nav-bar{background:var(--color-nav-bg);color:var(--color-nav-text);flex-shrink:0;align-items:center;gap:4px;height:52px;padding:0 20px;display:flex}.nav-brand{color:#fff;letter-spacing:.02em;margin-right:24px;font-weight:700}.nav-item{color:var(--color-nav-text);border-radius:var(--radius);cursor:pointer;background:0 0;border:none;padding:8px 14px;font-weight:500}.nav-item:hover{background:#ffffff14}.nav-item.active{color:var(--color-nav-text-active);background:#ffffff24}.nav-spacer{flex:1}.nav-user{align-items:center;gap:10px;font-size:13px;display:flex}.nav-logout{color:var(--color-nav-text);border-radius:var(--radius);cursor:pointer;background:0 0;border:1px solid #ffffff40;padding:6px 12px}.nav-logout:hover{color:#fff;border-color:#ffffff80}.view-body,.split-pane{flex:1;min-height:0;display:flex}.split-pane-list{border-right:1px solid var(--color-border);background:var(--color-surface);flex-direction:column;flex-shrink:0;width:360px;display:flex}.split-pane-detail{flex:1;min-width:0;overflow-y:auto}.btn{border-radius:var(--radius);border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);cursor:pointer;align-items:center;gap:6px;padding:8px 14px;font-weight:500;display:inline-flex}.btn:hover{background:#f0f2f5}.btn-primary{background:var(--color-primary);border-color:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-dark)}.btn-danger{color:var(--color-danger)}.input,.select,textarea.input{border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-surface);width:100%;color:var(--color-text);padding:8px 10px}.input:focus,.select:focus,textarea.input:focus{outline:2px solid var(--color-primary);outline-offset:-1px}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);box-shadow:var(--shadow-sm)}.list-toolbar{border-bottom:1px solid var(--color-border);flex-direction:column;gap:8px;padding:12px;display:flex}.list-items{flex:1;overflow-y:auto}.list-item{border-bottom:1px solid var(--color-border);cursor:pointer;padding:12px 16px}.list-item:hover{background:#f7f8fa}.list-item.selected{border-left:3px solid var(--color-primary);background:#eaf1fe}.list-item-name{font-weight:600}.list-item-sub{color:var(--color-text-muted);margin-top:2px;font-size:12px}.empty-state{color:var(--color-text-muted);text-align:center;padding:40px 20px}.error-banner{color:var(--color-danger);border-radius:var(--radius);background:#fef2f2;border:1px solid #fecaca;margin:12px;padding:10px 14px;font-size:13px}.badge{color:var(--color-text-muted);background:#eef0f3;border-radius:999px;align-items:center;padding:2px 10px;font-size:12px;font-weight:600;display:inline-flex}.badge-buyer{color:var(--color-success);background:#e6f4ea}.badge-seller{color:#b45309;background:#fef3e2}.badge-both{color:var(--color-primary-dark);background:#eaf1fe}.detail-header{border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:flex-start;gap:16px;padding:20px 24px;display:flex}.detail-fields{border-bottom:1px solid var(--color-border);grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:20px 24px;display:grid}.field-label{color:var(--color-text-muted);margin-bottom:4px;font-size:12px}.activity-section{padding:20px 24px}.activity-item{border-bottom:1px solid var(--color-border);gap:10px;padding:12px 0;display:flex}.activity-item:last-child{border-bottom:none}.activity-icon{width:28px;height:28px;color:var(--color-text-muted);background:#eef0f3;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;display:flex}.activity-meta{color:var(--color-text-muted);margin-bottom:2px;font-size:12px}.modal-overlay{z-index:50;background:#0f121880;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal{background:var(--color-surface);border-radius:var(--radius);box-shadow:var(--shadow-md);width:420px;max-width:calc(100vw - 32px);padding:24px}.modal h2{margin-top:0}.modal-actions{justify-content:flex-end;gap:8px;margin-top:20px;display:flex}.field-group{margin-bottom:12px}.login-screen{background:var(--color-bg);justify-content:center;align-items:center;height:100vh;display:flex}.login-card{width:360px;padding:32px}.login-card h1{margin:0 0 4px;font-size:22px}.login-card p{color:var(--color-text-muted);margin:0 0 24px;font-size:14px}.kanban-board{flex:1;gap:16px;padding:20px;display:flex;overflow-x:auto}.kanban-column{border-radius:var(--radius);background:#eef0f3;flex-direction:column;flex-shrink:0;width:260px;max-height:100%;display:flex}.kanban-column-header{justify-content:space-between;align-items:center;padding:12px 14px;font-weight:600;display:flex}.kanban-column-count{color:var(--color-text-muted);font-size:12px;font-weight:400}.kanban-column-body{flex-direction:column;flex:1;gap:8px;min-height:60px;padding:0 8px 8px;display:flex;overflow-y:auto}.kanban-card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);cursor:grab;box-shadow:var(--shadow-sm);padding:10px 12px}.kanban-card.dragging{opacity:.5}.kanban-card-name{font-size:13px;font-weight:600}.kanban-card-sub{color:var(--color-text-muted);margin-top:4px;font-size:12px}.slideover-overlay{z-index:50;background:#0f121866;justify-content:flex-end;display:flex;position:fixed;inset:0}.slideover-panel{background:var(--color-surface);width:480px;max-width:100vw;height:100%;box-shadow:var(--shadow-md);overflow-y:auto}