:root{--color-bg:#f4f5f1;--color-surface:#fff;--color-border:#e6e7e8;--color-text:#111;--color-text-muted:#5b5b5b;--color-text-faint:#8a8a8a;--color-primary:#82c112;--color-primary-dark:#5b8e0d;--color-primary-soft:#eef6e0;--color-nav-bg:#0e0e0e;--color-nav-text:#cfcfcf;--color-nav-text-active:#fff;--color-danger:#c0392b;--color-danger-soft:#fbeae8;--color-success:#5b8e0d;--color-amber:#a07221;--color-amber-soft:#fbf1e1;--color-blue:#2c9cc9;--color-blue-soft:#e7f4f9;--font-sans:"Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--radius:8px;--radius-lg:12px;--shadow-sm:0 1px 2px #1111110f;--shadow-md:0 8px 24px #11111124}*{box-sizing:border-box}html,body,#root{height:100%}body{font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;margin:0}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:2px;height:56px;padding:0 24px;display:flex}.nav-brand{letter-spacing:.02em;color:#fff;margin-right:28px;font-size:15px;font-weight:800}.nav-brand-accent{color:var(--color-primary)}.nav-item{color:var(--color-nav-text);border-radius:var(--radius);cursor:pointer;background:0 0;border:none;padding:8px 14px;font-size:13.5px;font-weight:600;transition:background-color .12s,color 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var(--color-border);border-radius:var(--radius-lg);max-width:880px;box-shadow:var(--shadow-sm);margin:0 auto 16px}.detail-header:last-child,.detail-fields:last-child,.activity-section:last-child{margin-bottom:0}.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-size:13.5px;font-weight:600;transition:background-color .12s,border-color .12s,box-shadow .12s;display:inline-flex}.btn:hover{background:#f7f8f5;border-color:#d4d6da}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--color-primary);border-color:var(--color-primary);color:#111;box-shadow:0 1px 2px #5b8e0d40}.btn-primary:hover{background:var(--color-primary-dark);border-color:var(--color-primary-dark);color:#fff}.btn-danger{color:var(--color-danger)}.btn-danger:hover{background:var(--color-danger-soft);border-color:#f0c9c3}.input,.select,textarea.input{border:1px solid 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.1s;display:flex}.list-item:hover{background:#fafaf8}.list-item.selected{background:var(--color-primary-soft);border-left-color:var(--color-primary)}.list-item-body{flex:1;min-width:0}.list-item-name{font-size:14px;font-weight:700}.list-item-sub{color:var(--color-text-muted);margin-top:3px;font-size:12.5px}.empty-state{color:var(--color-text-faint);text-align:center;padding:48px 20px;font-size:13.5px}.error-banner{background:var(--color-danger-soft);color:var(--color-danger);border-radius:var(--radius);border:1px solid #f0c9c3;margin:12px;padding:10px 14px;font-size:13px;font-weight:500}.avatar{color:#fff;background:var(--color-primary-dark);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-weight:700;display:flex}.avatar-sm{width:34px;height:34px;font-size:12.5px}.avatar-lg{width:52px;height:52px;font-size:18px}.badge{letter-spacing:.01em;color:var(--color-text-muted);background:#eef0f3;border-radius:999px;align-items:center;padding:3px 11px;font-size:11.5px;font-weight:700;display:inline-flex}.badge-buyer{background:var(--color-primary-soft);color:var(--color-primary-dark)}.badge-seller{background:var(--color-amber-soft);color:var(--color-amber)}.badge-both{background:var(--color-blue-soft);color:var(--color-blue)}.detail-header{background:var(--color-surface);justify-content:space-between;align-items:center;gap:16px;padding:22px 28px;display:flex}.detail-header-identity{align-items:center;gap:16px;display:flex}.detail-header h2{font-size:19px}.detail-fields{background:var(--color-surface);grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;padding:22px 28px;display:grid}.detail-fields h3,.activity-section 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32px);padding:26px}.modal h2{margin-top:0}.modal-actions{justify-content:flex-end;gap:8px;margin-top:20px;display:flex}.field-group{margin-bottom:14px}.login-screen{background:var(--color-bg);justify-content:center;align-items:center;height:100vh;display:flex}.login-card{border-radius:16px;width:380px;padding:36px}.login-wordmark{letter-spacing:.01em;color:var(--color-text);margin:0 0 4px;font-size:22px;font-weight:900}.login-wordmark span{color:var(--color-primary-dark)}.login-card p{color:var(--color-text-faint);margin:0 0 24px;font-size:13.5px}.login-divider{text-align:center;color:var(--color-text-faint);align-items:center;margin:18px 0;font-size:12px;display:flex}.login-divider:before,.login-divider:after{content:"";border-bottom:1px solid var(--color-border);flex:1}.login-divider span{padding:0 10px}.kanban-board{flex:1;gap:16px;padding:20px;display:flex;overflow-x:auto}.kanban-column{border-radius:var(--radius-lg);background:#eceee8;flex-direction:column;flex-shrink:0;width:268px;max-height:100%;display:flex}.kanban-column-header{text-transform:uppercase;letter-spacing:.03em;color:var(--color-text-muted);justify-content:space-between;align-items:center;padding:13px 14px;font-size:13px;font-weight:700;display:flex}.kanban-column-count{color:var(--color-text-faint);background:var(--color-surface);border-radius:999px;padding:1px 8px;font-size:12px;font-weight:700}.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:11px 13px;transition:box-shadow .12s,transform 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