:root{
  --bg:#f5f2ec; --panel:#ffffff; --line:#1d1d1d; --muted:#777; --accent:#0f5f5c; --soft:#e8e0d2;
}
*{box-sizing:border-box} body{margin:0;font-family:Inter,Arial,"Noto Sans Thai",sans-serif;background:var(--bg);color:#1e1e1e;overflow:hidden}
.app{height:100vh;display:grid;grid-template-columns:98px 1fr 340px;grid-template-rows:64px 1fr;grid-template-areas:"top top top" "tools work panel"}
.topbar{grid-area:top;background:#fff;border-bottom:1px solid #ddd;display:flex;align-items:center;justify-content:space-between;padding:0 14px;gap:12px}
.brand{display:flex;align-items:center;gap:10px}.brand span{display:block;color:var(--muted);font-size:12px}.brand-text{min-width:220px}.project-name-wrap{display:flex;align-items:center;gap:6px}.project-name-input{border:1px solid transparent;background:transparent;border-radius:6px;padding:3px 6px;margin-left:-6px;font-weight:800;font-size:16px;color:#18221f;min-width:160px;max-width:280px}.project-name-input:hover{border-color:#ddd;background:#fafafa}.project-name-input:focus{outline:2px solid rgba(20,33,31,.18);border-color:#14211f;background:#fff}.unsaved-dot.hidden{display:none}.logo{width:38px;height:38px;border-radius:12px;background:#14211f;color:#fff;display:grid;place-items:center;font-weight:800}
button,select,input{font:inherit}button{border:0;background:#eee;border-radius:10px;padding:9px 11px;cursor:pointer}button:hover{background:#ddd}.top-actions{display:flex;gap:8px;flex-wrap:wrap}.top-actions button:last-child,.top-actions button:nth-last-child(2){background:#123d3b;color:white}
.toolbar{grid-area:tools;background:#fff;border-right:1px solid #ddd;padding:10px;display:flex;flex-direction:column;gap:8px}.tool{width:100%;font-size:12px}.tool-group-title{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:#8a8176;margin:3px 0 0;text-align:center}.tool.active{background:var(--accent);color:#fff}.tool.danger{margin-top:auto;background:#fff1f1;color:#a51818}
.workspace-wrap{grid-area:work;position:relative;overflow:hidden;background:linear-gradient(135deg,#f7f2e9,#efebe4)}canvas{width:100%;height:100%;display:block}.hint{position:absolute;left:16px;bottom:16px;background:rgba(255,255,255,.9);border:1px solid #ddd;border-radius:999px;padding:8px 12px;color:#555;font-size:12px;box-shadow:0 8px 24px rgba(0,0,0,.08)}
.panel{grid-area:panel;background:#fff;border-left:1px solid #ddd;padding:12px;overflow:auto}section{border:1px solid #eee;border-radius:16px;padding:12px;margin-bottom:12px;background:#fff}h3{margin:0 0 10px;font-size:14px}label{display:block;font-size:12px;color:#555;margin:9px 0}input,select{width:100%;padding:8px;border:1px solid #ddd;border-radius:9px;background:#fafafa}.row{display:flex;gap:8px}.row button{flex:1}.info{font-size:12px;color:#555;line-height:1.5;background:#f8f8f8;border-radius:10px;padding:8px;min-height:34px;white-space:pre-line}
@media(max-width:900px){.app{grid-template-columns:76px 1fr;grid-template-rows:64px 1fr 260px;grid-template-areas:"top top" "tools work" "panel panel"}.panel{border-left:0;border-top:1px solid #ddd;display:grid;grid-template-columns:repeat(4,1fr);gap:8px}.panel section{margin:0}.topbar{align-items:flex-start;height:64px}.brand span{display:none}.top-actions button{padding:7px;font-size:12px}}

.build-flow-panel{border-color:#e3d8c8;background:linear-gradient(180deg,#fff,#fbf8f2)}
.flow-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}
.flow-pill{border:1px solid #e5ddcf;background:#fbf7ef;border-radius:14px;padding:9px 8px;text-align:left;min-height:56px;display:flex;flex-direction:column;gap:3px;box-shadow:0 2px 0 rgba(0,0,0,.02)}
.flow-pill b{font-size:12px;color:#24211d}.flow-pill span{font-size:10px;color:#7b746a;line-height:1.25}.flow-pill.active{background:#153f3d;color:#fff;border-color:#153f3d}.flow-pill.active b,.flow-pill.active span{color:#fff}.mini{font-size:11px;margin-top:8px}
.modal-backdrop{position:fixed;inset:0;background:rgba(20,18,15,.42);display:grid;place-items:center;z-index:20;padding:20px}.modal-backdrop.hidden{display:none}.modal-card{width:min(560px,96vw);background:#fff;border-radius:22px;padding:20px;box-shadow:0 24px 80px rgba(0,0,0,.22);border:1px solid #eee}.modal-card h2{margin:0 0 6px;font-size:21px}.modal-note{margin:0 0 14px;color:#69635b;font-size:13px}.modal-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.modal-grid label:first-child{grid-column:1/-1}.modal-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:16px}.modal-actions button{border-radius:12px}.primary{background:#123d3b;color:#fff}.ghost-danger{background:#fff0ef;color:#aa2b21;border:1px solid #ffd7d2}
.unsaved-dot{display:inline-block;width:7px;height:7px;border-radius:999px;background:#d6812f;margin-left:6px;vertical-align:middle}
@media(max-width:900px){.flow-grid{grid-template-columns:repeat(3,1fr)}.modal-grid{grid-template-columns:1fr}.modal-actions{flex-direction:column-reverse}.modal-actions button{width:100%}}

.context-palette{position:absolute;left:16px;top:16px;z-index:5;background:rgba(255,255,255,.94);border:1px solid #ddd;border-radius:18px;padding:10px;box-shadow:0 12px 32px rgba(0,0,0,.12);max-width:min(720px,calc(100% - 32px));display:flex;gap:8px;flex-wrap:wrap;align-items:center}.context-palette.hidden{display:none}.palette-title{font-size:11px;color:#756f66;font-weight:700;margin-right:4px}.palette-btn{border:1px solid #ddd;background:#fbfaf7;border-radius:999px;padding:7px 10px;font-size:12px}.palette-btn.active{background:#153f3d;color:#fff;border-color:#153f3d}.palette-btn small{opacity:.7}.unsaved-dot{display:inline-block;width:8px;height:8px;background:#d97706;border-radius:50%;margin-left:8px;vertical-align:middle}.top-actions #btnUndo,.top-actions #btnRedo{background:#f2ede5;color:#1f2927}.top-actions #btnUndo:disabled,.top-actions #btnRedo:disabled{opacity:.45;cursor:not-allowed}

.soft-danger{background:#fff0ef;color:#aa2b21;border:1px solid #ffd7d2}.floor-actions button{font-size:12px;padding:8px 6px}

/* Pro patch UI polish */
.top-actions button{white-space:nowrap}
.top-actions button:nth-last-child(2),.top-actions button:nth-last-child(3){background:#123d3b;color:white}
.panel section{box-shadow:0 6px 18px rgba(0,0,0,.035)}
.row button{flex:1}
button:disabled{opacity:.45;cursor:not-allowed}
button.primary{background:#0f5f5c;color:#fff}
.small-modal{max-width:520px}
.check-line{display:flex;align-items:center;gap:8px;background:#fafafa;border:1px solid #eee;border-radius:10px;padding:9px 10px;color:#333}
.check-line input{width:auto;margin:0}
.palette-btn small{opacity:.72}
.resize-note{color:#777;font-size:11px;margin-top:6px}

.context-palette{max-height:min(42vh,320px);overflow:auto}.palette-btn{min-width:140px;line-height:1.25}.palette-title{position:sticky;left:0}

.palette-category-row{display:flex;gap:8px;align-items:center;width:100%;flex-wrap:wrap;margin-bottom:4px}.palette-items-row{display:flex;gap:8px;flex-wrap:wrap}.palette-cat{border:1px solid #ddd;background:#fff;border-radius:999px;padding:7px 10px;font-size:12px}.palette-cat.active{background:#153f3d;color:#fff;border-color:#153f3d}