:root{--font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;--radius-sm: 4px;--radius-md: 8px;--space-1: 4px;--space-2: 8px;--space-3: 16px;--space-4: 24px;--color-bg: #0f1419;--color-surface: #1a2027;--color-surface-2: #232c36;--color-border: #2e3742;--color-text: #e6eaef;--color-text-muted: #8a96a3;--color-primary: #3b82f6;--color-primary-text: #ffffff;--color-danger: #f06464;--color-rail-bg: #141a21;--color-rail-active: #243447}:root[data-theme=light]{--color-bg: #f4f6f8;--color-surface: #ffffff;--color-surface-2: #eef1f4;--color-border: #d4dadf;--color-text: #1a2027;--color-text-muted: #5f6b78;--color-primary: #2563eb;--color-primary-text: #ffffff;--color-danger: #dc2626;--color-rail-bg: #e9edf1;--color-rail-active: #d8e3f5}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--color-bg);color:var(--color-text);font-family:var(--font-sans);font-size:14px;line-height:1.5}@keyframes traceexpert-calc-spinner{0%{transform:rotate(0)}to{transform:rotate(360deg)}}:where(input:not([type=checkbox],[type=radio]),select,textarea){font-family:inherit;font-size:14px;color:var(--color-text);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-sm);padding:var(--space-2)}:where(input,select,textarea):focus-visible{outline:2px solid var(--color-primary);outline-offset:-1px}:where(input,select,textarea):disabled{opacity:.6}.rail{width:14rem;flex-shrink:0;display:flex;flex-direction:column;gap:var(--space-1);padding:var(--space-3) var(--space-2);background:var(--color-rail-bg);border-right:1px solid var(--color-border)}.rail__brand{display:flex;align-items:center;gap:var(--space-2);padding:0 var(--space-2) var(--space-3);font-size:16px;font-weight:700;color:var(--color-text)}.rail__item{display:flex;align-items:center;gap:var(--space-2);width:100%;padding:var(--space-2);border:none;border-radius:var(--radius-sm);background:none;font-family:inherit;font-size:14px;text-align:left;text-decoration:none;color:var(--color-text-muted);cursor:pointer}.rail__item svg{flex-shrink:0}.rail__item:hover,.rail__item--active{color:var(--color-text);background:var(--color-rail-active)}.rail__item--disabled{opacity:.4;cursor:not-allowed;pointer-events:none}.rail__chevron{display:inline-flex;margin-left:auto;transition:transform .15s ease}.rail__chevron--open{transform:rotate(90deg)}.rail__children{display:flex;flex-direction:column;gap:var(--space-1);padding-left:var(--space-4)}.rail__child{padding:var(--space-1) var(--space-2);border-radius:var(--radius-sm);font-size:14px;text-decoration:none;color:var(--color-text-muted)}.rail__child:hover{color:var(--color-text);background:var(--color-rail-active)}.rail--collapsed{width:3.5rem}.rail--collapsed .rail__item,.rail--collapsed .rail__brand{justify-content:center;padding:var(--space-2)}.rail--collapsed .rail__item{position:relative}.rail--collapsed .rail__item:hover:after{content:attr(title);position:absolute;left:calc(100% + var(--space-2));top:50%;transform:translateY(-50%);padding:var(--space-1) var(--space-2);background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border);border-radius:var(--radius-sm);font-size:12px;white-space:nowrap;z-index:10;pointer-events:none;box-shadow:0 2px 8px #00000026}.rail__version{margin-top:auto;padding:var(--space-1) var(--space-2) 0;color:var(--color-text-muted);font-size:11px;line-height:1;letter-spacing:.02em}.rail--collapsed .rail__version{text-align:center;font-size:10px;padding:var(--space-1) 0 0}.rail__collapse{display:flex;align-items:center;gap:var(--space-2);padding:var(--space-2);border:none;background:none;font-family:inherit;font-size:13px;text-align:left;color:var(--color-text-muted);cursor:pointer;border-radius:var(--radius-sm)}.rail__collapse:hover{color:var(--color-text);background:var(--color-rail-active)}.rail--collapsed .rail__collapse{justify-content:center}.rail__collapse-icon{display:inline-flex;transform:rotate(180deg);transition:transform .15s ease}.rail__collapse-icon--flipped{transform:rotate(0)}.topbar{display:flex;align-items:center;min-height:3rem;padding:0 var(--space-4);background:var(--color-surface);border-bottom:1px solid var(--color-border)}.breadcrumbs{display:flex;align-items:center;gap:var(--space-2);font-size:14px}.breadcrumbs__item{color:var(--color-text-muted)}.breadcrumbs__item--current{color:var(--color-text);font-weight:600}.breadcrumbs__sep{color:var(--color-text-muted)}.topbar__user{display:flex;align-items:center;gap:var(--space-2);margin-left:auto;font-size:14px}.topbar__user-name{color:var(--color-text);font-weight:500}.topbar__logout{background:transparent;border:1px solid var(--color-border);color:var(--color-text);padding:.25rem .75rem;border-radius:var(--radius-1);cursor:pointer;font:inherit}.topbar__logout:hover{background:var(--color-bg)}.topbar__logout:disabled{opacity:.5;cursor:default}.app-shell{display:flex;height:100vh;overflow:hidden}.app-shell__main{display:flex;flex-direction:column;flex:1;min-width:0;min-height:0}.app-shell__content{flex:1;display:flex;flex-direction:column;min-height:0;padding:var(--space-4);overflow:auto}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-2) var(--space-3);border:1px solid transparent;border-radius:var(--radius-sm);font-family:inherit;font-size:14px;line-height:1.2;cursor:pointer;transition:background-color .12s ease,border-color .12s ease,filter .12s ease}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--primary{background:var(--color-primary);color:var(--color-primary-text)}.btn--primary:hover:not(:disabled){filter:brightness(1.12)}.btn--secondary{background:var(--color-surface-2);color:var(--color-text);border-color:var(--color-border)}.btn--secondary:hover:not(:disabled){background:var(--color-surface)}.btn--danger{background:var(--color-danger);color:var(--color-primary-text)}.btn--danger:hover:not(:disabled){filter:brightness(1.12)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;display:flex;align-items:center;justify-content:center;background:#00000080}.modal-card{min-width:20rem;max-width:90vw;max-height:90vh;overflow:auto;padding:var(--space-4);background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border);border-radius:var(--radius-md)}.search-input{width:100%;padding:var(--space-2);font-family:inherit;font-size:14px;color:var(--color-text);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-sm)}.search-input:focus{outline:2px solid var(--color-primary);outline-offset:-1px}.search-input::placeholder{color:var(--color-text-muted)}.home-page{display:flex;flex-direction:column;gap:var(--space-4)}.object-picker{display:flex;flex-direction:column;gap:var(--space-3);align-items:flex-start}.object-picker__columns{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-3);width:100%}.picker-column{display:flex;flex-direction:column;gap:var(--space-2);padding:var(--space-3);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md)}.picker-column__title{margin:0;font-size:14px}.picker-column__hint{margin:0;color:var(--color-text-muted)}.picker-column__list{display:flex;flex-direction:column;gap:2px;max-height:16rem;margin:0;padding:0;overflow-y:auto;list-style:none}.picker-column__item{width:100%;padding:var(--space-2);border:none;border-radius:var(--radius-sm);background:none;font-family:inherit;font-size:14px;text-align:left;color:var(--color-text);cursor:pointer}.picker-column__item:hover{background:var(--color-surface-2)}.picker-column__item--active{background:var(--color-primary);color:var(--color-primary-text)}.picker-column__empty{padding:var(--space-2);color:var(--color-text-muted);list-style:none}.recent-objects{display:flex;flex-direction:column;gap:var(--space-2)}.recent-objects__title{margin:0;font-size:16px}.recent-objects__empty{margin:0;color:var(--color-text-muted)}.recent-objects__list{display:flex;flex-wrap:wrap;gap:var(--space-2);margin:0;padding:0;list-style:none}.recent-objects__item{display:flex;flex-direction:column;gap:2px;padding:var(--space-2) var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);font-family:inherit;text-align:left;color:var(--color-text);cursor:pointer}.recent-objects__item:hover{border-color:var(--color-primary)}.recent-objects__layer{font-weight:600}.recent-objects__path{font-size:13px;color:var(--color-text-muted)}.recent-objects__item--workspace{border-color:var(--color-primary)}.recent-objects__item--draft{border-style:dashed}.recent-objects__badge{align-self:flex-start;font-size:11px;text-transform:uppercase;letter-spacing:.05em;color:var(--color-primary)}.recent-objects__badge--draft{color:var(--color-text-muted)}.home-page__bottom{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-4);align-items:start}.my-workspaces{display:flex;flex-direction:column;gap:var(--space-2)}.my-workspaces__header{display:flex;justify-content:space-between;align-items:center;gap:var(--space-2)}.my-workspaces__title{margin:0;font-size:16px}.my-workspaces__hint{margin:0;color:var(--color-text-muted)}.my-workspaces__list{display:flex;flex-direction:column;gap:var(--space-2);margin:0;padding:0;list-style:none;max-height:24rem;overflow-y:auto}.my-workspaces__item{display:grid;grid-template-columns:1fr auto auto;gap:var(--space-2);align-items:center;padding:var(--space-2) var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface)}.my-workspaces__open{display:flex;flex-direction:column;gap:2px;padding:0;border:none;background:none;font-family:inherit;text-align:left;color:var(--color-text);cursor:pointer}.my-workspaces__name{font-weight:600}.my-workspaces__path,.my-workspaces__shared{font-size:13px;color:var(--color-text-muted)}.my-workspaces__delete{width:2.25rem;height:2.25rem;display:inline-flex;align-items:center;justify-content:center;padding:0;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:transparent;font-size:18px;line-height:1;color:var(--color-text-muted);cursor:pointer}.my-workspaces__delete:hover{color:var(--color-danger, currentColor);border-color:var(--color-danger, var(--color-border))}.my-workspaces__open--editing{cursor:default}.my-workspaces__rename-input{padding:var(--space-1) var(--space-2);border:1px solid var(--color-primary);border-radius:var(--radius-sm);background:var(--color-surface-2, var(--color-surface));color:var(--color-text);font-family:inherit;font-size:14px;font-weight:600;width:100%;box-sizing:border-box}.data-table{width:100%;border-collapse:collapse}.data-table th,.data-table td{padding:var(--space-2);text-align:left;border-bottom:1px solid var(--color-border)}.data-table thead th{color:var(--color-text-muted);font-weight:600}.data-table__th--sortable{cursor:pointer;-webkit-user-select:none;user-select:none}.data-table tbody tr:hover{background:var(--color-surface-2)}.data-table__empty{margin:var(--space-3) 0 0;color:var(--color-text-muted)}.pagination{display:flex;align-items:center;gap:var(--space-2);margin-top:var(--space-3)}.pagination__info{color:var(--color-text-muted)}.sidebar-wrap{position:relative;display:flex;flex-direction:column;min-height:0}.sidebar--collapsed{position:relative;display:flex;align-items:flex-start;justify-content:center;padding:var(--space-2);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-1)}.sidebar--collapsed .sidebar__toggle--collapsed:hover:after{content:attr(title);position:absolute;right:calc(100% + var(--space-2));top:50%;transform:translateY(-50%);padding:var(--space-1) var(--space-2);background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border);border-radius:var(--radius-sm);font-size:12px;white-space:nowrap;z-index:10;pointer-events:none;box-shadow:0 2px 8px #00000026}.sidebar__toggle{display:inline-flex;align-items:center;justify-content:center;width:2rem;height:2rem;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-surface);cursor:pointer;color:var(--color-text-muted)}.sidebar__toggle:hover{color:var(--color-text);background:var(--color-bg)}.sidebar__toggle--floating{position:absolute;top:var(--space-2);right:var(--space-2);z-index:2}.sidebar__toggle-icon{display:inline-flex;transform:rotate(0);transition:transform .15s ease}.sidebar__toggle-icon--collapsed{transform:rotate(180deg)}