*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#eef1f5;--panel:#fff;--panel-2:#f8fafc;--border:#e3e8ef;--text:#111827;--muted:#6b7280;--accent:#1473e6;--accent-dark:#136dda;--danger:#dc2626;--radius:14px;--shadow:0 10px 30px rgba(15,23,42,.08);--green:#16803c;--green-bg:#edf8f0;--amber:#a16207;--amber-bg:#fff7df}
html,body{height:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);overflow:hidden}
h1{font-size:18px}h2{font-size:13px;text-transform:uppercase;color:var(--muted)}h3{font-size:12.5px;margin:12px 0 6px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.muted{color:var(--muted)}

#app{display:grid;grid-template-columns:minmax(340px,2fr) 3fr;gap:16px;padding:16px;height:100vh}
#app.chat-max{grid-template-columns:1fr}
#app.chat-max .studio-card{display:none}
#app.studio-max{grid-template-columns:1fr}
#app.studio-max .chat-card{display:none}
.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);display:flex;flex-direction:column;min-width:0;min-height:0;overflow:hidden}

.expand-btn{width:30px;height:30px;flex:0 0 auto;padding:0;display:grid;place-items:center;background:#fff;color:var(--muted);border:1px solid var(--border);border-radius:7px;font-size:13px;line-height:1;text-align:center}
.expand-btn:hover{background:#eef2f7;color:var(--text)}

.card-head{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 14px 12px 18px;border-bottom:1px solid var(--border);flex:0 0 auto}
.card-head-text{display:flex;flex-direction:column;gap:3px;min-width:0}
.card-title{display:flex;align-items:center;gap:9px}
.card-title h1{font-size:15px;font-weight:600}
.card-title .dot{width:8px;height:8px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 3px rgba(34,197,94,.15)}
.card-sub{font-size:12px;color:var(--muted)}

.chat-log{flex:1;min-height:0;overscroll-behavior:contain;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:10px;background:var(--panel-2)}
.msg{flex-shrink:0;max-width:84%;padding:10px 13px;border-radius:14px;font-size:13.5px;line-height:1.45}
.msg p{white-space:pre-wrap;word-break:break-word}
.msg.from-ai{align-self:flex-start;background:#fff;border:1px solid var(--border);border-bottom-left-radius:4px}
.msg.from-user{align-self:flex-end;background:var(--accent);color:#fff;border-bottom-right-radius:4px}
.msg-action{display:inline-block;margin-top:9px;padding:7px 13px;background:var(--accent);color:#fff;border-radius:8px;font-size:12.5px;text-align:center}
.msg-action[hidden]{display:none}
.msg-action:hover:not(:disabled){background:var(--accent-dark)}
.msg-action:disabled{opacity:.55;cursor:default}
.msg-gallery{max-width:100%;align-self:stretch;background:#fff;border:1px solid var(--border);border-radius:14px;padding:12px 14px}
.msg-gallery>p{font-size:13.5px;line-height:1.45}
.gallery-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:10px}
.gallery-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--border);border-radius:8px;overflow:hidden;min-width:0}
.gallery-card-title{padding:6px 9px;font-size:10.5px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);background:var(--panel-2);border-bottom:1px solid var(--border)}
.gallery-card-body{flex:1;min-height:0;padding:6px;display:flex;align-items:center;justify-content:center;background:#fff}
.gallery-card-body .proof-wrap{max-width:100%;box-shadow:none}

.chat-compose{display:flex;gap:8px;padding:12px;border-top:1px solid var(--border);background:var(--panel);flex:0 0 auto}
.chat-compose textarea{flex:1;resize:none;border:1px solid var(--border);border-radius:10px;padding:9px 11px;font:inherit;font-size:13.5px;line-height:1.4;max-height:160px;outline:none}
.chat-compose textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(20,115,230,.12)}
.chat-compose button{align-self:flex-end;padding:9px 16px;border-radius:10px;font-size:13px;text-align:center}

button{font:inherit;cursor:pointer;border:none;background:var(--accent);color:#fff;padding:8px 12px;border-radius:8px;font-size:13px;text-align:left}
button:hover{background:var(--accent-dark)}
button.primary{background:#059669;text-align:center}
button.primary:hover{background:#047857}
button.ghost{background:#fff;color:var(--text);border:1px solid var(--border)}
button.ghost:hover{background:#eef2f7}
button.danger{background:var(--danger);text-align:center;margin-top:12px}
button.danger:hover{background:#b91c1c}
input[type="text"],input[type="number"],select,textarea{width:100%;padding:8px 10px;border:1px solid var(--border);border-radius:8px;font:inherit;font-size:13px;background:#fff;color:var(--text)}
input[type="text"]:focus,input[type="number"]:focus,select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(20,115,230,.12)}
input[type="color"]{width:100%;height:32px;padding:2px;border:1px solid var(--border);border-radius:8px;background:#fff;cursor:pointer}
input[type="color"]::-webkit-color-swatch-wrapper{padding:0}
input[type="color"]::-webkit-color-swatch{border:none;border-radius:6px}
input[type="color"]::-moz-color-swatch{border:none;border-radius:6px}

.studio-head{padding:10px 10px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:6px;background:var(--panel);flex:0 0 auto}
.views{display:flex;gap:4px;flex-shrink:0}
button.view{width:auto;padding:5px 7px;font-size:12px;background:transparent;color:#4a5568;border:1px solid #d7dde5;border-radius:999px;text-align:center}
button.view:hover{background:#eef2f7}
button.view.active{background:#1a4f8a;color:#fff;border-color:#1a4f8a}
.history{display:flex;gap:4px;flex-shrink:0}
button.icon-btn{width:30px;height:30px;padding:0;display:grid;place-items:center;background:#fff;color:#4a5568;border:1px solid #d7dde5;border-radius:7px;font-size:15px;line-height:1;text-align:center}
button.icon-btn:hover:not(:disabled){background:#eef2f7;color:var(--text)}
button.icon-btn:disabled{opacity:.4;cursor:default;background:#fff}
#status{font-size:12.5px;color:var(--muted);margin-left:auto;flex:1 1 0;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#export{width:auto;flex-shrink:0;padding:8px}

.studio-body{flex:1;display:flex;min-height:0;overflow:hidden}
.side{position:relative;flex:0 0 auto;width:200px;background:var(--panel);border-right:1px solid var(--border);overflow:hidden;transition:width 160ms ease}
.side.right{border-right:none;border-left:1px solid var(--border)}
.side.collapsed{width:44px}
.side-inner{width:100%;height:100%;overscroll-behavior:contain;overflow-y:auto;padding:14px;display:flex;flex-direction:column;gap:12px}
.side.collapsed .side-inner{display:none}
.side-title{padding-right:34px;margin-bottom:2px}
.rail-toggle{position:absolute;top:10px;right:8px;z-index:5;width:26px;height:26px;padding:0;display:grid;place-items:center;background:transparent;border:1px solid var(--border);border-radius:6px;color:var(--muted);font-size:14px;line-height:1;text-align:center}
.rail-toggle:hover{background:#eef2f7;color:var(--text)}

.group{flex-shrink:0;border:1px solid var(--border);border-radius:10px;background:#fff;overflow:hidden}
.group>summary{list-style:none;cursor:pointer;user-select:none;padding:9px 12px;font-size:11.5px;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);display:flex;align-items:center;justify-content:space-between}
.group>summary::-webkit-details-marker{display:none}
.group>summary::after{content:'›';font-size:14px;line-height:1;transform:rotate(90deg);transition:transform 150ms ease}
.group[open]>summary::after{transform:rotate(-90deg)}
.group>summary:hover{background:var(--panel-2)}
.group-body{padding:10px;border-top:1px solid var(--border);display:flex;flex-direction:column;gap:6px}

.side-inner label,.modal-body label{display:flex;flex-direction:column;gap:5px;font-size:12px;font-weight:500;color:var(--muted);margin-bottom:10px}
#prop-restrictions label{flex-direction:row;align-items:center;gap:8px;margin-bottom:6px;font-weight:400;font-size:13px;color:var(--text)}
#prop-restrictions label input[type="checkbox"]{margin:0}
#props-empty p{font-size:13px}

#var-list,#font-list{list-style:none;display:flex;flex-direction:column;gap:4px;margin-top:2px}
#var-list li,#font-list li{font-size:12.5px;padding:6px 9px;background:var(--panel-2);border:1px solid var(--border);border-radius:7px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.studio-main{flex:1;min-width:0;display:flex;flex-direction:column;overflow:hidden}
.canvas-holder{flex:1;min-height:0;overscroll-behavior:contain;overflow:auto;padding:20px;display:flex;align-items:center;justify-content:center;background:#f6f8fb}
#design-canvas{background:#fff;border:1px solid var(--border);box-shadow:0 4px 12px rgba(0,0,0,.08)}
.canvas-holder>.canvas-container,.canvas-holder>#proof-host{flex-shrink:0}
.canvas-container[hidden]{display:none!important}
#layout-issues{flex-shrink:0;max-height:120px;overscroll-behavior:contain;overflow:auto;padding:8px 12px;background:#fff7ed;border-bottom:1px solid #fed7aa}
#layout-issues[hidden]{display:none}
#layout-issues .issue-row{display:flex;align-items:center;gap:6px;margin:3px 0}
#layout-issues .issue-message{flex:1;min-width:0;background:transparent;color:#9a3412;text-align:left;font-size:12px;padding:4px 6px;border-radius:6px}
#layout-issues .issue-message:hover{background:rgba(154,52,18,.08)}
#layout-issues .issue-dismiss{flex:0 0 auto;width:22px;height:22px;padding:0;display:grid;place-items:center;background:transparent;color:#9a3412;font-size:14px;line-height:1;border-radius:6px;text-align:center}
#layout-issues .issue-dismiss:hover{background:rgba(154,52,18,.12)}
#layout-issues .issue-clear-all{display:block;margin:6px 0 0;padding:3px 8px;background:transparent;color:#9a3412;font-size:11px;text-decoration:underline;text-align:left;border-radius:4px}
#layout-issues .issue-clear-all:hover{background:rgba(154,52,18,.08)}
#proof-host{width:100%;max-width:100%}
#proof-host[hidden]{display:none}
#proof-host .proof-wrap{max-width:none!important}
.proof-wrap{width:100%;margin:0 auto;background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.18)}
.proof-wrap svg{display:block;width:100%;height:auto}

.modal-backdrop{position:fixed;inset:0;z-index:100;background:rgba(15,23,42,.45);display:flex;align-items:center;justify-content:center;padding:24px}
.modal-backdrop[hidden]{display:none}
.modal{width:100%;max-width:400px;background:#fff;border-radius:14px;overflow:hidden;box-shadow:0 24px 60px rgba(15,23,42,.3)}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border)}
.modal-head h2{font-size:14px;font-weight:600;text-transform:none;color:var(--text)}
.modal-close{width:26px;height:26px;padding:0;display:grid;place-items:center;background:transparent;color:var(--muted);border-radius:6px;font-size:18px;line-height:1;text-align:center}
.modal-close:hover{background:#f1f5f9;color:var(--text)}
.modal-body{padding:18px}
.modal-body label:last-child{margin-bottom:0}
.modal-foot{display:flex;justify-content:flex-end;gap:8px;padding:14px 18px;border-top:1px solid var(--border);background:var(--panel-2)}
.modal-foot button{text-align:center}

@media(max-width:1080px){
  body{overflow:auto}
  #app{grid-template-columns:1fr;grid-template-rows:45vh minmax(520px,calc(100vh - 32px));height:auto;min-height:100vh}
  #app.chat-max,#app.studio-max{grid-template-rows:minmax(520px,calc(100vh - 32px))}
}

.msg-tool{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11px;color:var(--muted);background:var(--panel-2);border:1px solid var(--border);border-radius:6px;padding:4px 7px;margin-top:6px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* Assistant "thinking" block: the tool calls the model made this turn, above the reply.
   Open with a pulsing dot while the turn is running, collapsed to "Thought for Ns" when it ends.
   Clicking the header reopens it. */
.thinking{margin-bottom:9px;border:1px solid var(--border);border-radius:9px;background:var(--panel-2);overflow:hidden}
.thinking[hidden]{display:none}
.thinking>summary{list-style:none;cursor:pointer;user-select:none;display:flex;align-items:center;gap:7px;padding:6px 10px;font-size:11.5px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}
.thinking>summary::-webkit-details-marker{display:none}
.thinking>summary:hover{background:#eef2f7}
.thinking>summary::after{content:'›';margin-left:auto;font-size:14px;line-height:1;transform:rotate(90deg);transition:transform 150ms ease}
.thinking[open]>summary::after{transform:rotate(-90deg)}
.thinking:not(.done) .thinking-label::before{content:'';width:7px;height:7px;border-radius:50%;background:var(--accent);animation:thinking-pulse 1s ease-in-out infinite}
@keyframes thinking-pulse{0%,100%{opacity:.25;transform:scale(.75)}50%{opacity:1;transform:scale(1)}}
.thinking-body{display:flex;flex-direction:column;gap:4px;padding:7px 10px 9px;border-top:1px solid var(--border);max-height:180px;overscroll-behavior:contain;overflow:auto}
.thinking-body .msg-tool{margin-top:0}

.mapping-panel{display:none}
.mapping-panel p{margin:8px 0;color:var(--muted)}
#mapping-review>strong{display:none}
#mapping-review label.mapping-row{display:grid;grid-template-columns:16px 70px minmax(0,1fr);align-items:center;gap:9px;padding:11px 12px;border:1px solid var(--border);border-radius:8px;margin:0 0 8px;position:relative;color:var(--text)}
#mapping-review input[type=checkbox]{width:16px;height:16px;accent-color:var(--accent)}
#mapping-review input:not([type=checkbox]){width:100%;min-width:0;border:0;padding:3px 0;font-weight:600;background:transparent;font-size:12px}
#mapping-review span{width:auto;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--muted);font-size:12px}
#mapping-review small{grid-column:2 / 4;grid-row:2;color:var(--amber);font-size:11px}
#mapping-review>button{margin:10px 7px 0 0;font-weight:600;text-align:center}
#mapping-review>button:last-child{background:var(--panel);color:var(--muted);border:1px solid var(--border)}
#font-list li{display:flex;flex-direction:column;align-items:flex-start;gap:3px;padding:0;border:0;background:transparent;white-space:normal}
#font-list li>span:first-child{max-width:100%}
#font-list li>span:first-child{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.font-pill{flex-shrink:0;padding:3px 8px;border-radius:99px;font-size:11px;font-weight:600;color:var(--green);background:var(--green-bg)}
.font-pill.warn{color:var(--amber);background:var(--amber-bg)}
.font-pill.unused{color:var(--muted);background:var(--panel-2)}
#bound-fields{display:flex;flex-direction:column;gap:8px}
.bound-field{display:flex;align-items:center;gap:12px;width:100%;padding:12px;background:var(--green-bg);color:var(--text);border:1px solid var(--border);border-left:3px solid var(--green)}
.bound-field::before{content:"\2713";color:var(--green);font-weight:700}
.bound-field:hover{background:var(--panel-2)}
.bound-field strong{font-size:12px;min-width:70px}
.bound-field span{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#bound-fields[hidden]{display:none}
.mapping-panel>label{display:flex;flex-direction:column;gap:5px;margin:12px 0 8px;color:var(--muted)}
#mapping-brief{width:100%;padding:8px;border:1px solid var(--border);border-radius:8px;font:inherit}

/* Mapping review that renders inside the chat log as an assistant message. */
.mapping-msg{max-width:100%;align-self:stretch}
.mapping-msg>p{font-size:13.5px;line-height:1.45;margin:0 0 10px;white-space:normal}
.mapping-msg .mapping-list{display:flex;flex-direction:column;gap:6px}
.mapping-msg .mapping-row{display:grid;grid-template-columns:16px 70px minmax(0,1fr);align-items:center;gap:9px;padding:9px 11px;border:1px solid var(--border);border-radius:8px;margin:0;position:relative;color:var(--text);font-size:12px;font-weight:400}
.mapping-msg .mapping-row.uncertain{border-color:var(--amber)}
.mapping-msg .mapping-row>input[type=checkbox]{width:16px;height:16px;accent-color:var(--accent);margin:0}
.mapping-msg .mapping-row>input:not([type=checkbox]){width:100%;min-width:0;border:0;padding:3px 0;font-weight:600;background:transparent;font-size:12px}
.mapping-msg .mapping-row>span{width:auto;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--muted);font-size:12px}
.mapping-msg .mapping-row>small{grid-column:2 / 4;grid-row:2;color:var(--amber);font-size:11px}
.mapping-msg .mapping-actions{display:flex;gap:8px;margin-top:10px}
.mapping-msg .mapping-actions button{text-align:center}
.mapping-msg .mapping-actions button:last-child{background:var(--panel);color:var(--muted);border:1px solid var(--border)}
.mapping-msg .mapping-ai-inline{margin-top:12px;padding-top:10px;border-top:1px solid var(--border)}
.mapping-msg .mapping-ai-inline>summary{list-style:none;cursor:pointer;user-select:none;display:flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;color:var(--accent)}
.mapping-msg .mapping-ai-inline>summary::-webkit-details-marker{display:none}
.mapping-msg .mapping-ai-inline>summary::after{content:'▸';margin-left:auto;font-size:10px;color:var(--muted);transition:transform 120ms ease}
.mapping-msg .mapping-ai-inline[open]>summary::after{transform:rotate(90deg)}
.mapping-msg .mapping-ai-body{display:flex;flex-direction:column;gap:8px;margin-top:10px;padding:10px;background:var(--panel-2);border:1px solid var(--border);border-radius:8px}
.mapping-msg .mapping-ai-body>p{margin:0;font-size:12px;color:var(--muted);white-space:normal;line-height:1.4}
.mapping-msg .mapping-ai-body>input{padding:7px 10px;border:1px solid var(--border);border-radius:7px;font:inherit;font-size:12.5px;background:#fff;width:100%}
.mapping-msg .mapping-ai-body>input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(20,115,230,.12)}
.mapping-msg .mapping-ai-body>button{align-self:flex-start;padding:7px 14px;font-size:12.5px;text-align:center}
.mapping-msg .mapping-ai-error{margin:0;font-size:12px;color:var(--danger);white-space:normal}

.generated-proof-modal{max-width:1100px;max-height:92vh;display:flex;flex-direction:column}
.generated-proof-modal .modal-body{overflow:auto}
.generated-proof-row{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}.generated-proof-row img{width:100%}.generated-proof-row figcaption{font-size:12px;margin-bottom:8px}#generated-test-values{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:12px 0}

.mapping-ai{border:1px solid var(--border);border-radius:8px;padding:10px;margin-top:10px}
.mapping-ai>label{display:flex;flex-direction:column;gap:5px;margin-bottom:8px;color:var(--muted)}
.mapping-ai>strong{font-size:12px}
.view-check{font-size:11px;color:var(--muted);margin-left:8px;align-self:center}
.dropdown-option{border-top:1px solid var(--border);padding-top:8px;margin-top:8px}
.dropdown-option textarea{resize:vertical;min-height:50px}
.dropdown-option-actions{display:flex;flex-wrap:wrap;gap:4px;align-items:center;margin-bottom:8px}
.dropdown-option-actions label{flex-direction:row;align-items:center;margin:0;gap:4px}
.dropdown-option-actions button{padding:5px}
#dropdown-properties>button,#dropdown-variable-editor>button{margin:5px 0;width:100%}
.dropdown-sheet{max-width:880px;max-height:90vh;display:flex;flex-direction:column}
.dropdown-sheet .modal-body{overflow:auto}
.dropdown-sheet label:has(input[type=checkbox]){flex-direction:row;align-items:center}
.dropdown-table-scroll{overflow:auto;max-height:220px;margin:12px 0}
.dropdown-sheet-table{border-collapse:collapse;width:100%;font-size:12px}
.dropdown-sheet-table th,.dropdown-sheet-table td{border:1px solid var(--border);padding:8px;white-space:pre-wrap}
.dropdown-sheet-table th{text-align:left;background:var(--panel)}
.dropdown-column-map{border-top:1px solid var(--border);padding:12px 0;display:grid;gap:8px;
grid-template-columns:minmax(100px,1fr) minmax(150px,1fr) minmax(150px,1fr)}
.dropdown-column-map>label:last-child{grid-column:2 / -1}
.dropdown-values-preview{white-space:pre-wrap;max-height:180px;overflow:auto;font-size:12px}
textarea:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media(max-width:700px){.dropdown-column-map{display:flex;flex-direction:column}}