:root { --rnl-blue:#149bd7; --rnl-ink:#102131; --rnl-line:#c9dbe6; --rnl-muted:#526c7a; --rnl-green:#157347; --rnl-red:#b4232f; }
* { box-sizing:border-box; }
html,body { min-height:100%; }
body { margin:0; color:var(--rnl-ink); background:#edf5f9; font-family:Arial,Helvetica,sans-serif; }
button,input,select { font:inherit; }
.app { min-height:100vh; display:grid; grid-template-rows:auto minmax(0,1fr); }
.topbar { min-height:72px; display:grid; grid-template-columns:minmax(240px,1fr) auto; align-items:center; gap:16px; padding:11px 18px; color:#fff; background:#071018; }
.brand { min-width:0; display:flex; align-items:center; gap:14px; }.brand-logo { display:inline-flex; border-radius:6px; }.brand h1 { margin:0; color:#fff; font-size:clamp(1.35rem,2vw,2rem); line-height:1.05; }
.top-actions { display:flex; align-items:center; justify-content:flex-end; gap:8px; }.icon-button { width:48px; min-width:48px; min-height:48px; display:inline-grid; place-items:center; padding:0; border:2px solid #263d51; border-radius:8px; color:#fff; background:#122436; cursor:pointer; }.icon-button:hover,.icon-button:focus-visible { border-color:#8fd8f3; color:#06111a; background:var(--rnl-blue); }.icon { width:24px; height:24px; display:block; pointer-events:none; }
.home-button { min-height:48px; display:inline-flex; align-items:center; justify-content:center; padding:0 14px; border:2px solid #263d51; border-radius:8px; color:#fff; background:#122436; font-weight:800; text-decoration:none; }.home-button:hover,.home-button:focus-visible { border-color:#8fd8f3; color:#06111a; background:var(--rnl-blue); }
.rnl-tool { min-height:calc(100vh - 74px); display:grid; grid-template-rows:auto auto minmax(0,1fr); color:var(--rnl-ink); background:#edf5f9; }
.rnl-toolbar { min-height:68px; display:flex; align-items:end; gap:10px; padding:10px 16px; border-bottom:1px solid var(--rnl-line); background:#fff; }
.rnl-toolbar label,.rnl-step label { display:grid; gap:5px; color:var(--rnl-muted); font-size:.82rem; font-weight:800; }
.rnl-toolbar input,.rnl-toolbar select,.rnl-step input { min-width:0; min-height:48px; padding:8px 11px; border:1px solid #9fb8c8; border-radius:8px; color:var(--rnl-ink); background:#fff; font:inherit; font-size:1rem; font-weight:800; }.rnl-step input { width:100%; }
.rnl-toolbar input { width:150px; }.rnl-toolbar select { min-width:150px; }.rnl-toolbar-spacer { flex:1; }
.rnl-menu { position:relative; align-self:flex-end; }
.rnl-menu summary { min-height:48px; display:flex; align-items:center; padding:0 15px; border:1px solid #9fb8c8; border-radius:8px; color:var(--rnl-ink); background:#fff; font-weight:800; cursor:pointer; list-style:none; }
.rnl-menu summary::-webkit-details-marker { display:none; }
.rnl-menu[open] summary,.rnl-menu summary:hover,.rnl-menu summary:focus-visible { border-color:#006b99; box-shadow:0 0 0 3px rgba(20,155,215,.18); outline:0; }
.rnl-menu-panel { position:absolute; z-index:20; top:calc(100% + 6px); right:0; width:min(310px,calc(100vw - 28px)); display:grid; gap:7px; padding:10px; border:1px solid #9fb8c8; border-radius:9px; background:#fff; box-shadow:0 14px 34px rgba(7,32,48,.2); }
.rnl-toolbar .rnl-model-choice { position:relative; display:block; color:var(--rnl-ink); font-size:.92rem; }
.rnl-model-choice input { position:absolute; opacity:0; pointer-events:none; }
.rnl-model-choice span { min-height:48px; display:flex; align-items:center; padding:8px 11px; border:1px solid #c5d5de; border-radius:7px; background:#fff; cursor:pointer; }
.rnl-model-choice input:checked + span { border-color:#087eaf; color:#fff; background:#087eaf; }
.rnl-model-choice input:focus-visible + span { outline:3px solid rgba(20,155,215,.3); outline-offset:2px; }
.rnl-model-choice input:disabled + span { opacity:.48; cursor:not-allowed; }
.rnl-menu-panel small { color:var(--rnl-muted); line-height:1.35; }
.rnl-generator-panel { width:min(410px,calc(100vw - 28px)); gap:10px; }
.rnl-generator-panel p { margin:0; }
.rnl-generator-scope { color:var(--rnl-ink); font-size:.9rem; font-weight:800; line-height:1.35; }
.rnl-generator-fields { min-width:0; display:grid; gap:10px; margin:0; padding:0; border:0; }
.rnl-generator-fields:disabled { opacity:.55; }
.rnl-generator-range { display:grid; grid-template-columns:1fr 1fr; gap:9px; }
.rnl-generator-panel .rnl-generator-range label,.rnl-generator-panel .rnl-generator-mix-field { min-width:0; color:var(--rnl-muted); font-size:.82rem; font-weight:800; }
.rnl-generator-panel input[type="text"],.rnl-generator-panel select { width:100%; min-width:0; min-height:48px; padding:8px 10px; border:1px solid #9fb8c8; border-radius:8px; color:var(--rnl-ink); background:#fff; font:inherit; font-weight:800; }
.rnl-generator-units { min-width:0; margin:0; padding:0; border:0; }
.rnl-generator-units legend { margin-bottom:6px; color:var(--rnl-muted); font-size:.82rem; font-weight:800; }
.rnl-generator-unit-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:7px; }
.rnl-toolbar .rnl-check-choice { position:relative; display:block; color:var(--rnl-ink); font-size:.86rem; }
.rnl-check-choice input { position:absolute; opacity:0; pointer-events:none; }
.rnl-check-choice span { min-height:48px; display:flex; align-items:center; justify-content:center; padding:7px 8px; border:1px solid #c5d5de; border-radius:7px; background:#fff; cursor:pointer; }
.rnl-check-choice input:checked + span { border-color:#087eaf; color:#fff; background:#087eaf; }
.rnl-check-choice input:focus-visible + span { outline:3px solid rgba(20,155,215,.3); outline-offset:2px; }
.rnl-check-choice input:disabled + span { cursor:not-allowed; }
.rnl-generator-summary { padding:8px 9px; border-radius:7px; color:#164c64; background:#edf8fc; font-size:.82rem; font-weight:800; line-height:1.35; }
.rnl-generator-status { min-height:1.1em; color:var(--rnl-muted); font-size:.84rem; font-weight:800; line-height:1.35; }
.rnl-generator-status:empty { display:none; }
.rnl-generator-status[data-tone="success"] { color:var(--rnl-green); }
.rnl-generator-status[data-tone="error"] { color:var(--rnl-red); }
.rnl-button { min-height:48px; padding:0 15px; border:1px solid #9fb8c8; border-radius:8px; color:var(--rnl-ink); background:#fff; font:inherit; font-weight:800; cursor:pointer; }
.rnl-button:hover,.rnl-button:focus-visible { border-color:#006b99; box-shadow:0 0 0 3px rgba(20,155,215,.18); outline:0; }
.rnl-button.rnl-primary { border-color:#087eaf; color:#fff; background:var(--rnl-blue); }
.rnl-button:disabled { opacity:.48; cursor:not-allowed; }
.rnl-context-card { margin:12px 14px 0; padding:12px 16px; border:1px solid #a9d5e8; border-radius:10px; background:#f7fcfe; }
.rnl-context-card p { margin:0 0 9px; font-weight:800; }.rnl-context-controls { display:flex; align-items:flex-end; flex-wrap:wrap; gap:8px 12px; }.rnl-context-card fieldset { min-width:0; flex:0 1 auto; margin:0; padding:0; border:0; }.rnl-context-card legend { margin-bottom:7px; color:var(--rnl-muted); font-size:.86rem; font-weight:800; }.rnl-context-controls .rnl-choice-row { align-items:center; }.rnl-context-controls > .rnl-button { flex:0 0 auto; }.rnl-context-reason { margin:9px 0 0!important; color:var(--rnl-green); }
.rnl-workspace { min-width:0; min-height:0; display:grid; grid-template-columns:minmax(340px,420px) minmax(0,1fr); gap:14px; padding:14px; }
.rnl-reasoning,.rnl-model-panel { min-width:0; min-height:0; border:1px solid var(--rnl-line); border-radius:12px; background:#fff; box-shadow:0 8px 22px rgba(7,32,48,.07); }
.rnl-reasoning { overflow:auto; padding:14px; }.rnl-model-panel { display:grid; grid-template-rows:minmax(0,1fr) auto; overflow:auto; padding:12px; }
.rnl-prompt { margin-bottom:12px; padding:13px 14px; border-radius:9px; color:#fff; background:#073047; }.rnl-kicker { display:block; margin-bottom:4px; color:#9ee4ff; font-size:.78rem; font-weight:900; letter-spacing:.06em; text-transform:uppercase; }.rnl-prompt strong { font-size:clamp(1.08rem,2vw,1.35rem); }
.rnl-step { margin:0 0 10px; padding:11px; border:1px solid var(--rnl-line); border-radius:9px; }.rnl-step legend { padding:0 5px; font-weight:900; }.rnl-step legend span { width:28px; height:28px; display:inline-grid; place-items:center; margin-right:6px; border-radius:7px; color:#fff; background:#087eaf; }.rnl-step p { margin:0 0 9px; color:var(--rnl-muted); }.rnl-step.is-locked { opacity:.52; background:#f4f7f9; }.rnl-step.is-complete { border-color:#6fb58f; background:#f3fbf6; }
.rnl-pair { display:grid; grid-template-columns:1fr 1fr; gap:8px; }.rnl-step-actions { display:flex; flex-wrap:wrap; gap:8px; margin-top:9px; }
.rnl-choice-row { display:flex; flex-wrap:wrap; gap:8px; }.rnl-choice { position:relative; display:block!important; color:var(--rnl-ink)!important; }.rnl-choice input { position:absolute; opacity:0; pointer-events:none; }.rnl-choice span { min-height:48px; display:inline-flex; align-items:center; justify-content:center; padding:7px 13px; border:1px solid #9fb8c8; border-radius:8px; background:#fff; cursor:pointer; }.rnl-choice input:checked + span { border-color:#006b99; color:#fff; background:#087eaf; }.rnl-choice input:focus-visible + span { outline:3px solid rgba(20,155,215,.3); outline-offset:2px; }
.rnl-decision-choices { gap:12px; }.rnl-step-status { min-height:0; margin:8px 0 0!important; font-size:.88rem; font-weight:800; }.rnl-step-status:empty { display:none; }.rnl-step-status[data-tone="success"] { color:var(--rnl-green); }.rnl-step-status[data-tone="error"] { color:var(--rnl-red); }
.rnl-feedback { min-height:54px; display:flex; align-items:center; margin:4px 0 0; padding:10px 12px; border-left:5px solid #6f8794; border-radius:7px; background:#f2f7fa; font-weight:800; }.rnl-feedback[data-tone="success"] { border-left-color:var(--rnl-green); color:#0b5934; background:#eef9f3; }.rnl-feedback[data-tone="error"] { border-left-color:var(--rnl-red); color:#81202a; background:#fff2f3; }
.rnl-model-host { min-height:360px; display:grid; place-items:stretch; }.rnl-model-host .question-visual { width:100%; height:100%; margin:0; display:grid; grid-template-rows:auto minmax(0,1fr) auto; }.rnl-model-host .diagram-frame,.rnl-model-host svg { width:100%; height:100%; min-height:300px; }.rnl-model-host figcaption { font-size:clamp(1rem,1.4vw,1.25rem); }
.rnl-model-panel:is([data-representation="place-value"],[data-representation="hundred-square"]) { overflow:hidden; }
.rnl-model-panel:is([data-representation="place-value"],[data-representation="hundred-square"]) .rnl-model-host { min-height:0; overflow:hidden; }
.rnl-model-panel:is([data-representation="place-value"],[data-representation="hundred-square"]) .question-visual { min-height:0; grid-template-rows:auto minmax(0,1fr); overflow:hidden; }
.rnl-model-panel:is([data-representation="place-value"],[data-representation="hundred-square"]) .diagram-frame,.rnl-model-panel:is([data-representation="place-value"],[data-representation="hundred-square"]) svg { min-height:0; max-height:100%; }
.rnl-model-panel:is([data-mode="context"],[data-mode="reverse"]) { overflow:hidden; }
.rnl-model-panel:is([data-mode="context"],[data-mode="reverse"]) .rnl-model-host { min-height:0; overflow:hidden; }
.rnl-model-panel:is([data-mode="context"],[data-mode="reverse"]) .question-visual { min-height:0; overflow:hidden; }
.rnl-model-panel:is([data-mode="context"],[data-mode="reverse"]) .diagram-frame,.rnl-model-panel:is([data-mode="context"],[data-mode="reverse"]) svg { min-height:0; max-height:100%; }
.rnl-model-actions { display:flex; justify-content:center; flex-wrap:wrap; gap:8px; margin:8px 0 2px; }
.rnl-model-actions:not(:has(button:not([hidden]))) { display:none; }
.rnl-replay { justify-self:center; }
.rnl-compare { margin-top:10px; border:1px solid var(--rnl-line); border-radius:9px; background:#f8fbfd; }.rnl-compare summary { min-height:48px; display:flex; align-items:center; padding:8px 12px; font-weight:900; cursor:pointer; }.rnl-compare > div { padding:6px 10px 10px; }.rnl-compare .question-visual { margin:0; }.rnl-compare svg { width:100%; max-height:270px; }
.rnl-instructions { width:min(720px,calc(100vw - 28px)); max-height:calc(100vh - 28px); padding:0; border:0; border-radius:11px; color:var(--rnl-ink); box-shadow:0 24px 70px rgba(0,0,0,.35); }.rnl-instructions::backdrop { background:rgba(4,19,29,.62); }.rnl-dialog-header { display:flex; align-items:center; justify-content:space-between; gap:15px; padding:14px 17px; color:#fff; background:#071018; }.rnl-dialog-header h2 { margin:0; }.rnl-dialog-body { padding:17px 20px; line-height:1.52; }.rnl-dialog-body li { margin-bottom:7px; }
@media (prefers-reduced-motion:reduce) { .rnl-tool * { scroll-behavior:auto!important; transition:none!important; animation:none!important; } }
@media (min-width:901px) { .rnl-tool { height:calc(100vh - 72px); overflow:hidden; } }
@media (max-width:900px) { .app { display:block; }.topbar { grid-template-columns:1fr; }.top-actions { justify-content:flex-start; flex-wrap:wrap; }.rnl-toolbar { align-items:stretch; flex-wrap:wrap; }.rnl-toolbar label { flex:1 1 145px; }.rnl-toolbar input,.rnl-toolbar select { width:100%; }.rnl-generator-panel label { flex:auto; }.rnl-generator-menu .rnl-menu-panel { left:0; right:auto; }.rnl-toolbar-spacer { display:none; }.rnl-workspace { grid-template-columns:1fr; }.rnl-model-panel { min-height:420px; }.rnl-model-panel[data-representation="place-value"] { height:clamp(250px,70vw,300px); min-height:0; }.rnl-model-panel[data-mode="context"] { height:clamp(210px,55vw,250px); min-height:0; }.rnl-model-panel[data-mode="reverse"] { height:clamp(240px,65vw,290px); min-height:0; }.rnl-model-panel[data-representation="hundred-square"] { height:clamp(330px,95vw,390px); min-height:0; }.rnl-reasoning { overflow:visible; }.rnl-tool { display:block; }.rnl-pair { grid-template-columns:1fr; } }
@media (max-width:440px) { .rnl-generator-range { grid-template-columns:1fr; }.rnl-generator-unit-grid { grid-template-columns:1fr 1fr; } }
@media print {
  @page { size:A4 landscape; margin:8mm; }
  html,body { width:100%; height:auto!important; overflow:visible!important; background:#fff!important; }
  .topbar,.rnl-toolbar,.rnl-context-card .rnl-button,.rnl-step .rnl-button,.rnl-step-actions,.rnl-feedback,.rnl-instructions,.rnl-model-actions,.classroom-tools-layer,.annotation-toolbar { display:none!important; }
  .app,.rnl-tool,.rnl-workspace { min-height:0!important; height:auto!important; }
  .rnl-tool { display:block; background:#fff; }.rnl-workspace { display:grid; grid-template-columns:92mm 1fr; gap:5mm; padding:0; }.rnl-reasoning,.rnl-model-panel { height:164mm; overflow:hidden; border:1px solid #93a9b7; box-shadow:none; }.rnl-reasoning { padding:4mm; }.rnl-model-panel { padding:4mm; }.rnl-prompt { margin-bottom:2mm; padding:2mm; }.rnl-step { margin-bottom:1mm; padding:1.5mm; }.rnl-step input { min-height:9mm; padding:1mm; }.rnl-choice span { min-height:9mm; padding:1mm; }.rnl-step.is-locked { display:none; }#rnlPlaceStep p { display:none; }.rnl-model-host { min-height:115mm; }.rnl-model-host .diagram-frame,.rnl-model-host svg { min-height:105mm; }.rnl-compare { display:none; }
}