/* WPS palette: PMS 289 C navy, PMS 200 C red, white. */
.app-header{border-top:4px solid #ba0c2f}.brand-mark{background:#0c2340;color:#fff}.brand-tag{max-width:165px;letter-spacing:1px}.primary{color:#fff}.status-dot{background:var(--orange)}
.intro{font-size:14px;line-height:1.6}.workspace-heading{margin-bottom:20px}.lesson-steps{display:flex;gap:30px;margin:0 0 23px;color:var(--muted);font-size:12px}.lesson-steps span{display:flex;align-items:center;gap:9px}.lesson-steps b{width:25px;height:25px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;color:var(--green);background:var(--panel);font:11px var(--mono)}
.import-zone{background:var(--soft);border-color:#bac9d9}.import-zone:hover,.import-zone.dragging{background:#e9eff7;border-color:#0c2340}.import-icon{background:#e1e9f3;color:#0c2340}.import-zone>span:last-child{color:var(--muted)}.data-table tr.selected,.data-table td:focus-within{background:#edf2f9}.data-table input[type=text]:focus{background:var(--panel)}.data-notice,.fit-error{background:#fbeef1}.graph-index,.tag,.chart-interaction-hint,.workspace-footer{color:var(--muted)}.legend-line.min,.line-sample.min{border-color:#52789e}.legend-line.max,.line-sample.max{border-color:var(--orange)}
.mode-bar{display:flex;align-items:center;gap:6px;padding:14px 20px;background:var(--soft);border-bottom:1px solid var(--line)}.mode-button{display:flex;align-items:center;gap:8px;min-height:39px;padding:8px 13px;border:1px solid transparent;border-radius:6px;background:transparent;color:var(--muted);font-size:12px;font-weight:600}.mode-button>span{font:10px var(--mono);opacity:.7}.mode-button[aria-pressed=true]{background:var(--panel);color:var(--green);border-color:var(--line);box-shadow:0 1px 3px #0c234008}.mode-caption{margin-left:auto;font-size:11px;color:var(--muted)}
.manual-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:12px;padding:14px 21px;border-bottom:1px solid var(--line)}.line-picker{display:flex;gap:5px}.line-picker button{display:flex;align-items:center;gap:7px;min-height:36px;border:1px solid var(--line);border-radius:5px;padding:7px 10px;font-size:11px;background:var(--panel)}.line-picker button[aria-pressed=true]{background:var(--soft);border-color:var(--green);box-shadow:inset 0 0 0 1px var(--green)}.manual-toolbar .check-label{font-size:11px;margin-left:auto;white-space:normal}.manual-toolbar>p{flex-basis:100%;font-size:12px;color:var(--muted);line-height:1.6}.manual-toolbar>.text-btn{font-size:11px;color:var(--green)}
.chart-region{height:370px}.manual-handles{position:absolute;inset:0;pointer-events:none;overflow:hidden}.line-handle{position:absolute;width:38px;height:38px;transform:translate(-50%,-50%);border:0;background:transparent;padding:0;pointer-events:auto;touch-action:none;cursor:ns-resize;border-radius:50%;display:grid;place-items:center;z-index:2}.line-handle::before{content:'';width:13px;height:13px;border:2.5px solid #ba0c2f;background:var(--panel);border-radius:50%;box-shadow:0 0 0 4px #ba0c2f18;transition:transform .15s}.line-handle[data-line=min]::before{border-color:#52789e;box-shadow:0 0 0 4px #52789e20}.line-handle:hover::before,.line-handle:focus-visible::before{transform:scale(1.25)}.line-handle:focus-visible{outline:2px solid var(--green);outline-offset:-1px}.line-handle[data-line=min]{z-index:3}.chart-tooltip{font-size:11px}
.graph-footer{align-items:flex-start}.legend label{font-size:11px;min-height:24px}.legend-line{width:19px}.chart-interaction-hint{padding-top:5px}.plot-title-row h2{font-size:17px}.plot-title-row p{font-size:11px;line-height:1.6}.analysis-heading h2,.manual-panel-heading h2{font-size:15px}.section-no{color:var(--orange)}.equation-block p,.stat small{font-size:10px}.bounds-title strong,.bound-stat>span{font-size:11px}.bounds-title div>span{font-size:10px}.bound-stat strong{font-size:14px}
.manual-panel{margin-top:18px;padding:20px 22px;border-top:3px solid #ba0c2f}.manual-panel-heading{display:flex;justify-content:space-between;align-items:center;gap:14px}.manual-panel-heading>div{display:flex;gap:11px;align-items:center}.manual-intro{font-size:12px;line-height:1.75;color:var(--muted);margin:12px 0;max-width:760px}.manual-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:17px}.manual-card{border:1px solid var(--line);padding:15px;border-radius:7px;min-width:0}.manual-card>div{display:flex;align-items:center;justify-content:space-between;gap:12px}.manual-card>div>span{display:flex;gap:7px;align-items:center;font-size:12px}.manual-card output{font:18px var(--mono);overflow-wrap:anywhere;min-width:0}.manual-equation{font:11px/1.7 var(--mono);margin-top:8px;overflow-wrap:anywhere;color:var(--muted)}.manual-feedback{font-size:11px;line-height:1.6;margin-top:7px;color:var(--muted)}.manual-card[data-compatible=true]{border-color:#748ba6;background:var(--soft)}.manual-card[data-compatible=false] .manual-feedback{color:var(--danger)}.manual-range{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:15px 0;margin-top:5px}.manual-range span{font-size:12px;color:var(--muted)}.manual-range b{display:block;font-weight:400;margin-top:4px;font-family:var(--mono);font-size:11px}.manual-range output{font:18px var(--mono);white-space:nowrap}.manual-status{font-size:12px;line-height:1.7;color:var(--muted);padding-bottom:12px}.manual-numbers,.teacher-prompt{border-top:1px solid var(--line);padding-top:13px;margin-top:8px}.manual-numbers summary,.teacher-prompt summary,.advanced-analysis>summary{font-size:12px;cursor:pointer;color:var(--green);line-height:1.6}.manual-numbers p,.teacher-prompt p{font-size:12px;line-height:1.8;color:var(--muted);margin:10px 0}.manual-number-fields{display:grid;grid-template-columns:1.3fr 1fr 1fr auto;gap:10px;align-items:end}.manual-number-fields label{display:flex;flex-direction:column;gap:6px;font-size:11px;color:var(--muted)}.manual-number-fields input{height:36px;padding:0 9px;width:100%;font:12px var(--mono)}.manual-number-fields select{width:100%;font-size:12px}.manual-number-fields .btn{font-size:11px}.advanced-analysis{margin-top:20px}.advanced-analysis>summary{padding:4px 0}.diagnostics{font-size:12px}.insight-panel .text-btn,.prediction-panel .hint{font-size:11px}
body[data-theme=dark] .manual-card[data-compatible=true]{border-color:#627e9f}body[data-theme=dark] .import-zone:hover{background:#203b58}body[data-theme=dark] .line-handle::before{border-color:#ff7895}body[data-theme=dark] .line-handle[data-line=min]::before{border-color:#9fbfe5}
@media(min-width:1600px){.chart-region{height:430px}}
@media(max-width:1250px){.mode-caption{display:none}.manual-panel-heading{align-items:flex-start;flex-wrap:wrap}.manual-number-fields{grid-template-columns:1fr 1fr}.manual-toolbar .check-label{margin-left:0}.legend{gap:12px}.graph-footer{flex-wrap:wrap}.manual-panel{padding:18px}.manual-card>div{align-items:flex-start;flex-direction:column;gap:9px}}
@media(max-width:900px){.lesson-steps{gap:15px;font-size:11px}.mode-bar{padding:10px 12px;gap:4px}.mode-button{font-size:11px;padding:7px 9px}.manual-toolbar{padding:12px 15px}.manual-cards{gap:9px}.manual-card{padding:12px}.manual-panel-heading .btn{font-size:11px}.legend label{font-size:10px}.chart-region{height:350px}}
@media(max-width:680px){.lesson-steps{gap:10px;font-size:10px;align-items:flex-start;justify-content:space-between}.lesson-steps span{gap:6px;max-width:110px;line-height:1.5}.lesson-steps b{flex-shrink:0;width:22px;height:22px}.intro{font-size:12px;max-width:330px}.mode-bar{padding:11px 12px;gap:6px}.mode-button{flex:1;justify-content:center;font-size:11px;min-height:42px}.manual-toolbar{gap:10px}.manual-toolbar .check-label{min-height:30px;font-size:11px}.manual-toolbar>p{font-size:11px}.line-picker{width:100%}.line-picker button{flex:1;min-height:40px;justify-content:center}.manual-toolbar>.text-btn{margin-left:auto}.manual-panel{padding:17px 15px;margin-top:13px}.manual-panel-heading{gap:11px}.manual-panel-heading .btn{width:100%;min-height:40px}.manual-panel-heading h2{font-size:15px}.manual-intro{font-size:12px}.manual-cards{gap:9px}.manual-card{padding:11px}.manual-card>div>span{font-size:11px}.manual-card output{font-size:17px}.manual-equation{font-size:10px}.manual-range output{font-size:16px}.manual-range b{font-size:10px}.manual-number-fields{grid-template-columns:1fr 1fr}.manual-number-fields .btn{height:36px}.chart-region{height:340px}.line-handle{width:44px;height:44px}.legend{justify-content:flex-start;column-gap:14px;row-gap:2px}.legend label{font-size:10px}.plot-title-row p{font-size:10px}.stat small{font-size:9px}.bounds-title div>span{font-size:10px}.bound-stat strong{font-size:13px}}

.manual-live-readout{flex-basis:100%;padding:9px 11px;background:var(--soft);border-left:3px solid var(--orange);font:11px/1.6 var(--mono);color:var(--ink)}.manual-live-readout[data-compatible=true]{border-left-color:var(--green)}

body[data-theme=dark]{--orange:#ff7895}body[data-theme=dark] .legend-line.min,body[data-theme=dark] .line-sample.min{border-color:#9fbfe5}