:root{color-scheme:light;--ink: #14171c;--ink-soft: #3c434c;--muted: #707984;--line: #edeff2;--line-strong: #dde1e6;--panel: #ffffff;--bg: #f5f6f8;--surface: #f3f4f6;--surface-2: #eceef1;--rail: #1a1d23;--rail-2: #15181d;--rail-line: rgba(255, 255, 255, .07);--rail-ink: #aeb6c0;--rail-ink-dim: #7b838d;--green: #1f7a4d;--gold: #b27a1f;--red: #cc3845;--radius-card: 10px;--radius-ctrl: 8px;--radius-pill: 7px;--s-xs: 4px;--s-s: 8px;--s-m: 16px;--s-l: 24px;--shadow-xs: 0 1px 2px rgba(18, 24, 36, .05);--shadow-sm: 0 1px 2px rgba(18, 24, 36, .04), 0 1px 3px rgba(18, 24, 36, .07);--shadow-md: 0 2px 4px rgba(18, 24, 36, .04), 0 4px 12px rgba(18, 24, 36, .08);--accent: #6f9e6a;--accent-ink: #ffffff}:root[data-theme=sage]{--accent: #6f9e6a;--red: #b56170}:root[data-theme=steel]{--accent: #4f7fe0;--red: #cc3845}:root[data-theme=brass]{--accent: #c0913f;--red: #cc3845}:root[data-theme=violet]{--accent: #9268e0;--red: #d9476b}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:14px;line-height:1.45;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}h1,h2,h3,h4,p{margin:0}h1{font-size:22px;line-height:1.15;letter-spacing:-.02em;font-weight:700}h2{font-size:18px;letter-spacing:-.015em;font-weight:700}h3{font-size:14px;font-weight:650;letter-spacing:-.005em}h4{font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-weight:700}.muted{color:var(--muted)}.small{font-size:12px}.grow{flex:1}code{font:12px ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--muted)}button{min-height:36px;border:1px solid transparent;border-radius:var(--radius-ctrl);background:var(--accent);color:var(--accent-ink);font:inherit;font-weight:600;padding:0 15px;cursor:pointer;box-shadow:var(--shadow-xs);transition:filter .14s ease,box-shadow .14s ease,transform .06s ease,background .14s ease,border-color .14s ease,color .14s ease}button:hover{filter:brightness(1.06);box-shadow:var(--shadow-sm)}button:active{transform:translateY(.5px);filter:brightness(.97)}button:disabled{opacity:.45;cursor:not-allowed;filter:none;box-shadow:none}button.ghost{background:var(--panel);color:var(--ink);border-color:var(--line-strong)}button.ghost:hover{border-color:color-mix(in srgb,var(--accent) 55%,var(--line-strong));filter:none;background:var(--panel)}:focus-visible{outline:2px solid color-mix(in srgb,var(--accent) 55%,transparent);outline-offset:2px}input,select,textarea{font:inherit;border:1px solid var(--line-strong);border-radius:var(--radius-ctrl);padding:8px 11px;background:var(--panel);color:var(--ink);width:100%;transition:border-color .14s ease,box-shadow .14s ease}input::placeholder,textarea::placeholder{color:color-mix(in srgb,var(--muted) 75%,#fff)}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,transparent)}label{display:grid;gap:5px;font-weight:600;font-size:12px;color:var(--ink-soft)}.app-shell{min-height:100vh;display:grid;grid-template-columns:184px minmax(0,1fr)}.boot{padding:40px;color:var(--muted)}.rail{display:flex;flex-direction:column;align-items:stretch;gap:var(--s-l);padding:20px 14px;background:linear-gradient(180deg,var(--rail) 0%,var(--rail-2) 100%);border-right:1px solid var(--rail-line);position:sticky;top:0;height:100vh}.brand{display:flex;align-items:center;gap:10px;min-height:36px;padding:0 6px;color:#f7f8fa;text-decoration:none}.brand:hover{color:#fff}.brand-mark{width:32px;height:32px;border-radius:8px;object-fit:cover;box-shadow:0 1px 2px #00000052}.brand-name{color:#f7f8fa;font-size:15px;font-weight:750;line-height:1}.rail nav{display:grid;gap:2px}.nav-item{background:transparent;border:0;color:var(--rail-ink);text-align:left;padding:9px 12px;border-radius:var(--radius-ctrl);font-weight:550;font-size:13px;min-height:36px;box-shadow:none;transition:background .14s ease,color .14s ease}.nav-item:hover{background:#ffffff12;color:#fff;filter:none;box-shadow:none}.nav-item:active{transform:none}.nav-item.active{background:var(--accent);color:var(--accent-ink);font-weight:600;box-shadow:0 1px 2px #0000002e}.nav-item.active:hover{filter:brightness(1.05)}main{min-width:0;padding:var(--s-l) 28px 56px}.topbar{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--s-m);margin-bottom:var(--s-l)}.topbar p{color:var(--muted);margin-top:4px;font-size:13px}.actions{display:flex;gap:var(--s-s)}.status-strip{display:grid;grid-template-columns:repeat(4,minmax(120px,1fr));gap:var(--s-s);margin-bottom:var(--s-l)}.status-strip div{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-xs);padding:12px 15px;min-width:0}.status-strip span{display:block;color:var(--muted);font-size:11px;font-weight:600;margin-bottom:4px}.status-strip strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:15px;font-weight:650}.stack{display:grid;gap:var(--s-m)}.row{display:flex;gap:var(--s-s);align-items:end;flex-wrap:wrap}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:var(--s-s)}.card{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--panel);padding:var(--s-m) var(--s-l);box-shadow:var(--shadow-sm)}.card-head{display:flex;align-items:center;justify-content:space-between;gap:var(--s-s);margin-bottom:var(--s-s)}.pill{font-size:11px;font-weight:700;padding:3px 9px;border-radius:999px;text-transform:capitalize;letter-spacing:.01em}.pill.ok{background:color-mix(in srgb,var(--green) 13%,#fff);color:var(--green)}.pill.bad{background:color-mix(in srgb,var(--red) 13%,#fff);color:var(--red)}.eyebrow{text-transform:uppercase;letter-spacing:.07em;font-size:10px;color:var(--muted);font-weight:700}.ok{color:var(--green)}.warn{color:var(--gold)}.bad{color:var(--red)}.hero{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--s-m);padding:var(--s-l)}.hero h2{margin:8px 0 6px;font-size:22px}.action-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:var(--s-m)}.action-card{background:var(--panel);color:var(--ink);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-sm);display:grid;gap:5px;padding:16px;text-align:left;min-height:74px;transition:border-color .14s ease,box-shadow .14s ease,transform .1s ease}.action-card:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--line));filter:none;box-shadow:var(--shadow-md);transform:translateY(-1px)}.action-card strong{font-size:14px;font-weight:650}.action-card span{color:var(--muted);font-weight:400;font-size:12px;line-height:1.4}.subtabs{display:flex;align-items:center;margin-bottom:var(--s-m)}.subtabs .grow{flex:1}.subtab{background:var(--surface);color:var(--muted);border:1px solid var(--line-strong);border-left-width:0;border-radius:0;box-shadow:none;min-height:34px;padding:0 16px;font-size:13px;font-weight:600}.subtab:first-of-type{border-left-width:1px;border-radius:var(--radius-ctrl) 0 0 var(--radius-ctrl)}.subtab:last-of-type{border-radius:0 var(--radius-ctrl) var(--radius-ctrl) 0}.subtab:hover{color:var(--ink);filter:none;box-shadow:none;background:var(--panel)}.subtab.active{background:var(--panel);color:var(--accent);border-color:color-mix(in srgb,var(--accent) 45%,var(--line-strong));box-shadow:var(--shadow-xs);position:relative;z-index:1}.subtab.active:hover{filter:none}textarea#raw,#hist-text{min-height:420px;resize:vertical;font:13px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace}.editor-body{display:grid;gap:var(--s-m)}.validation-rail{display:grid;gap:6px}.msg{margin:0;padding:9px 12px;border-radius:var(--radius-ctrl);background:var(--surface);border:1px solid var(--line)}.msg.ok{background:color-mix(in srgb,var(--green) 8%,#fff);border-color:color-mix(in srgb,var(--green) 22%,var(--line))}.msg.bad{background:color-mix(in srgb,var(--red) 8%,#fff);border-color:color-mix(in srgb,var(--red) 22%,var(--line))}.msg.warn{background:color-mix(in srgb,var(--gold) 10%,#fff);border-color:color-mix(in srgb,var(--gold) 24%,var(--line))}.form fieldset{border:1px solid var(--line);border-radius:var(--radius-card);padding:var(--s-m) var(--s-l)}.form legend{font-weight:650;padding:0 8px;font-size:13px;color:var(--ink)}.builder{display:grid;grid-template-columns:256px minmax(0,1fr);gap:var(--s-m);align-items:start}.palette{border:1px solid var(--line);border-radius:var(--radius-card);padding:var(--s-s);background:var(--panel);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:var(--s-s);position:sticky;top:var(--s-l);max-height:calc(100vh - 200px)}.palette-list{overflow:auto;display:grid;gap:var(--s-m);padding-right:2px}.palette-group h4{margin-bottom:7px}.ex-chip{background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius-pill);padding:5px 10px;margin:2px 3px 0 0;font-size:12px;cursor:grab;display:inline-block;transition:border-color .12s ease,background .12s ease,box-shadow .12s ease}.ex-chip:hover{border-color:color-mix(in srgb,var(--accent) 50%,var(--line-strong));background:color-mix(in srgb,var(--accent) 9%,#fff);box-shadow:var(--shadow-xs)}.ex-chip:active{cursor:grabbing}.canvas{min-width:0}.rotation{display:flex;gap:6px;flex-wrap:wrap;margin:var(--s-s) 0}.rot-chip{background:var(--accent);color:var(--accent-ink);padding:6px 13px;border-radius:var(--radius-pill);font-weight:650;font-size:12px;cursor:grab;box-shadow:var(--shadow-xs)}.rot-chip:active{cursor:grabbing}.days{display:flex;gap:6px;flex-wrap:wrap}.day{background:var(--panel);color:var(--muted);text-transform:uppercase;font-size:11px;font-weight:600;padding:0 11px;min-height:30px;border:1px solid var(--line-strong);box-shadow:none}.day:hover{filter:none;box-shadow:none;border-color:color-mix(in srgb,var(--accent) 50%,var(--line-strong));color:var(--ink);background:var(--panel)}.day.on{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);box-shadow:var(--shadow-xs)}.day.on:hover{color:var(--accent-ink);filter:brightness(1.05)}.sessions{display:grid;grid-template-columns:repeat(auto-fill,minmax(248px,1fr));gap:var(--s-m)}.session{padding:var(--s-m)}.session h3{margin-bottom:var(--s-s)}.slot{display:grid;grid-template-columns:34px 1fr;gap:var(--s-s);align-items:start;padding:9px 0;border-top:1px solid var(--line)}.slot:first-of-type{border-top:0;padding-top:2px}.slot .tier{font-size:10px;font-weight:800;letter-spacing:.03em;color:var(--muted);padding-top:9px}.slot.locked .slot-fixed{padding:8px 0;font-weight:600}.slot-drop{border:1.5px dashed var(--line-strong);border-radius:var(--radius-ctrl);padding:9px 11px;color:var(--ink);font-weight:600;transition:border-color .12s ease,background .12s ease}.slot-drop.drag-over,.alt-drop.drag-over,.dropzone.drag-over{border-color:var(--accent);border-style:solid;background:color-mix(in srgb,var(--accent) 9%,#fff);color:var(--ink)}.alts{display:flex;gap:6px;flex-wrap:wrap;margin-top:7px}.alt-chip{display:inline-flex;align-items:center;gap:4px;background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--radius-pill);padding:2px 4px 2px 10px;font-size:12px}.alt-chip .policy,.alt-chip .x{min-height:20px;padding:0 6px;border-radius:5px;background:var(--panel);color:var(--muted);border:1px solid var(--line-strong);font-size:11px;box-shadow:none}.alt-chip .policy.progression_equivalent{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.alt-drop{border:1.5px dashed var(--line-strong);border-radius:var(--radius-pill);padding:3px 11px;font-size:12px;color:var(--muted);transition:border-color .12s ease,color .12s ease}.alt-drop:hover{border-color:var(--accent);color:var(--ink)}.patch-row{display:grid;grid-template-columns:44px 1fr 32px;gap:var(--s-s);align-items:start;padding:var(--s-m) 0;border-top:1px solid var(--line)}.patch-row:first-of-type{border-top:0}.patch-text{font:12px ui-monospace,Menlo,monospace;background:var(--surface);padding:9px 11px;border:1px solid var(--line);border-radius:var(--radius-ctrl);white-space:pre-wrap;margin:7px 0 0;color:var(--ink-soft)}.x{background:var(--panel);color:var(--red);border:1px solid var(--line-strong);min-height:28px;padding:0 8px;box-shadow:none}.x:hover{filter:none;box-shadow:none;border-color:var(--red);background:color-mix(in srgb,var(--red) 8%,#fff)}.switch{position:relative;display:inline-block;width:40px;height:24px}.switch input{display:none}.switch span{position:absolute;inset:0;background:var(--line-strong);border-radius:999px;transition:.18s;cursor:pointer}.switch span:after{content:"";position:absolute;width:18px;height:18px;left:3px;top:3px;background:#fff;border-radius:50%;transition:.18s;box-shadow:0 1px 2px #00000038}.switch input:checked+span{background:var(--accent)}.switch input:checked+span:after{transform:translate(16px)}.session-render{display:grid;gap:var(--s-m)}.session-head{display:flex;align-items:baseline;gap:var(--s-s)}.exercise-card{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--panel);padding:var(--s-m) var(--s-l);box-shadow:var(--shadow-sm)}.exercise-card header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--s-s)}.lane{font:11px ui-monospace,Menlo,monospace;color:var(--muted);background:var(--surface);padding:2px 7px;border-radius:6px}.sets{display:grid;gap:5px}.set{display:grid;grid-template-columns:28px 1fr 1fr;gap:var(--s-s);padding:8px 11px;background:var(--surface);border-radius:var(--radius-ctrl)}.set-n{font-weight:700;color:var(--muted)}.rest{color:var(--muted);margin-top:var(--s-s);font-size:12px}.sim-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--s-s)}.sim-stats div{background:var(--panel);border:1px solid var(--line);padding:11px 13px;border-radius:var(--radius-ctrl);box-shadow:var(--shadow-xs)}.sim-stats span{display:block;color:var(--muted);font-size:11px;font-weight:600;margin-bottom:3px}.sim-stats strong{font-size:18px;font-weight:650;text-transform:capitalize}.sim-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:var(--s-m)}.lane-card{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--panel);box-shadow:var(--shadow-sm);padding:12px 14px;display:grid;gap:9px}.lane-card header{display:flex;align-items:center;justify-content:space-between;gap:var(--s-s)}.lane-title{display:flex;align-items:baseline;gap:7px;min-width:0}.lane-title strong{font-size:14px;font-weight:650}.tier-badge{font:10px ui-monospace,Menlo,monospace;font-weight:700;color:var(--muted);background:var(--surface);padding:2px 6px;border-radius:5px;letter-spacing:.02em}.kind-tag{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:2px 7px;border-radius:999px;color:var(--muted);background:var(--surface)}.kind-tag.load{color:var(--green);background:color-mix(in srgb,var(--green) 12%,#fff)}.kind-tag.stage{color:var(--gold);background:color-mix(in srgb,var(--gold) 14%,#fff)}.spark{display:block;width:100%;height:auto}.spark-base{stroke:var(--line-strong);stroke-width:1}.spark-area{stroke:none;fill:color-mix(in srgb,var(--accent) 11%,transparent)}.spark-line{fill:none;stroke:var(--accent);stroke-width:2;stroke-linejoin:round;stroke-linecap:round}.spark-dot{fill:var(--panel);stroke:var(--accent);stroke-width:2}.spark.dir-up .spark-line,.spark.dir-up .spark-dot{stroke:var(--green)}.spark.dir-up .spark-area{fill:color-mix(in srgb,var(--green) 13%,transparent)}.spark.dir-down .spark-line,.spark.dir-down .spark-dot{stroke:var(--red)}.spark.dir-down .spark-area{fill:color-mix(in srgb,var(--red) 13%,transparent)}.spark.dir-step .spark-line,.spark.dir-step .spark-dot{stroke:var(--gold)}.spark.dir-step .spark-area{fill:color-mix(in srgb,var(--gold) 12%,transparent)}.spark.dir-flat .spark-line,.spark.dir-flat .spark-dot{stroke:var(--muted)}.spark.dir-flat .spark-area{fill:color-mix(in srgb,var(--muted) 10%,transparent)}.lane-foot{display:flex;align-items:center;justify-content:space-between;gap:var(--s-s)}.lane-range{font:12px ui-monospace,Menlo,monospace;color:var(--ink-soft)}.lane-range .arrow{color:var(--muted)}.delta{font-size:12px;font-weight:700;padding:2px 8px;border-radius:999px;white-space:nowrap}.delta.up{color:var(--green);background:color-mix(in srgb,var(--green) 12%,#fff)}.delta.down{color:var(--red);background:color-mix(in srgb,var(--red) 12%,#fff)}.delta.flat{color:var(--muted);background:var(--surface)}.delta.step{color:var(--gold);background:color-mix(in srgb,var(--gold) 14%,#fff)}.timeline{display:grid;gap:2px;max-height:360px;overflow:auto}.tl-row{display:grid;grid-template-columns:28px minmax(90px,.8fr) minmax(0,1.7fr);gap:var(--s-s);padding:8px 10px;border-radius:var(--radius-ctrl);align-items:center}.tl-row:nth-child(odd){background:var(--surface)}.tl-n{color:var(--muted);font-weight:700}.tl-effects{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end}.tl-effect{font:11px ui-monospace,Menlo,monospace;color:var(--ink-soft);display:inline-flex;align-items:center;gap:5px}.import-preview{gap:4px}.import-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:var(--s-m);padding:10px 12px;border-radius:var(--radius-ctrl);align-items:center}.import-row:nth-child(odd){background:var(--surface)}.import-main{display:flex;align-items:baseline;gap:var(--s-s);min-width:0}.import-row strong,.import-row span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.import-detail{grid-column:1 / -1;color:var(--ink-soft);font:12px ui-monospace,Menlo,monospace}.kv{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--s-s)}.kv div{background:var(--surface);padding:11px 13px;border-radius:var(--radius-ctrl)}.kv span{display:block;color:var(--muted);font-size:11px;font-weight:600;margin-bottom:3px}.json{font:12px/1.55 ui-monospace,Menlo,monospace;background:var(--surface);padding:var(--s-m);border:1px solid var(--line);border-radius:var(--radius-ctrl);max-height:400px;overflow:auto;white-space:pre-wrap;color:var(--ink-soft)}.dropzone{border:1.5px dashed var(--line-strong);border-radius:var(--radius-card);padding:22px;text-align:center;color:var(--muted);margin-bottom:var(--s-s);transition:border-color .12s ease,background .12s ease}.themes{display:flex;gap:var(--s-s);flex-wrap:wrap}.theme-chip{background:var(--panel);color:var(--ink);display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line-strong)}.theme-chip:hover{filter:none;border-color:color-mix(in srgb,var(--accent) 50%,var(--line-strong))}.theme-chip.active{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 28%,transparent)}.sw{width:14px;height:14px;border-radius:4px;display:inline-block}.sw-sage{background:#6f9e6a}.sw-steel{background:#4f7fe0}.sw-brass{background:#c0913f}.sw-violet{background:#9268e0}@media(max-width:920px){.app-shell{grid-template-columns:1fr}.rail{flex-direction:row;align-items:center;gap:var(--s-s);padding:8px 14px;position:static;height:auto;border-right:0;border-bottom:1px solid var(--rail-line);background:var(--rail)}.brand{padding:0 2px}.brand-mark{width:28px;height:28px}.brand-name{font-size:14px}.rail nav{display:flex;flex-wrap:wrap}main{padding:var(--s-m) var(--s-m) 40px}.status-strip,.builder,.sessions,.grid2,.kv{grid-template-columns:1fr}.sim-stats{grid-template-columns:repeat(2,1fr)}.palette{position:static;max-height:none}}