#app-shell{
display:flex;align-items:center;gap:16px;padding:10px 24px;
background:var(--panel);border-bottom:1px solid var(--line);
position:sticky;top:0;z-index:20;
}
#app-shell .brand{font-family:var(--serif);font-size:20px;font-weight:700;color:var(--ink)}
#app-shell .mode-tabs{display:flex;gap:2px;background:var(--soft);border:none;border-radius:0;padding:2px}
#app-shell .mode-tab{
font-family:var(--sans);font-size:13px;font-weight:600;padding:4px 14px;border-radius:0;
border:none;background:transparent;color:var(--muted);cursor:pointer;
/* identical box for button and anchor tabs: the UA centers button labels
   vertically, anchors sit on the text baseline — without this the Wiki link
   renders a pixel or two off its button siblings */
display:inline-flex;align-items:center;justify-content:center;line-height:1;
}
#app-shell .mode-tab:hover{background:color-mix(in srgb,var(--accent) 10%,transparent);color:var(--ink)}
#app-shell .mode-tab.active{background:var(--accent);color:var(--accent-ink)}
#app-shell .mode-tab.active:hover{background:var(--accent-hi)}
#app-shell a.mode-tab{text-decoration:none}
#app-shell .shell-spacer{flex:1}
#app-shell .shell-btn{font-size:13px;padding:5px 14px}
#app-shell .shell-btn[hidden]{display:none}
#app-shell .shell-icon-btn{
border:none;border-radius:0;background:transparent;cursor:pointer;
font-family:var(--sans);font-size:16px;line-height:1;padding:6px 10px;
color:var(--muted);display:inline-flex;align-items:center;
}
#app-shell .shell-icon-btn:hover{color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,transparent)}

.solve-group{display:inline-flex;align-items:stretch}
.entry-actions .solve-group .solve-config{font-size:18px;line-height:1;padding:8px 12px;background:transparent;color:var(--muted);cursor:pointer;display:inline-flex;align-items:center}
.entry-actions .solve-group .solve-config:hover{color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,transparent)}
.entry-actions .solve-group .solve-config.custom{color:var(--accent)}
.tech-dialog{border:none;border-radius:0;padding:0;max-width:560px;width:min(560px,92vw);box-shadow:0 8px 30px rgba(42,37,32,.18);background:var(--panel);color:var(--ink)}
.tech-dialog form{padding:22px 24px}
.tech-dialog h2{font-family:var(--serif);font-size:19px;margin:0 0 6px}
.tech-dialog-desc{color:var(--muted);font-size:13px;line-height:1.5;margin:0 0 14px}
.tech-dialog code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:12px}
.tech-presets{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
.chip-btn{font-size:12px;padding:4px 10px}
.tech-group{margin-bottom:12px}
.tech-group h3{font-size:12px;color:var(--accent);text-transform:none;border-bottom:1px solid var(--line);padding-bottom:3px;margin:0 0 6px}
.tech-group .tech-items{display:flex;flex-wrap:wrap;gap:6px 14px}
.tech-items label{display:inline-flex;align-items:center;gap:5px;font-size:13px;cursor:pointer;color:var(--ink)}
.tech-items input{accent-color:var(--accent)}
.tech-dialog-actions{display:flex;align-items:center;gap:10px;justify-content:flex-end;margin-top:16px;border-top:1px solid var(--line);padding-top:14px}
.tech-dialog-actions .muted{margin-right:auto;font-size:12px}

#entry-view{padding:24px;display:flex;flex-direction:column;gap:20px}
@media (min-width:900px){
#entry-view{max-width:1040px;margin:0 auto;display:grid;grid-template-columns:280px minmax(0,1fr);grid-template-areas:"examples panel";gap:28px;align-items:start}
#entry-view .example-section{grid-area:examples}
#entry-view .entry-panel{grid-area:panel}
}
.entry-panel{
background:var(--panel);
border:none;border-radius:0;padding:28px;
box-shadow:0 1px 0 rgba(42,37,32,.03);
}
.entry-title{font-family:var(--serif);font-size:24px;margin:0 0 6px;font-weight:700}
.entry-desc{color:var(--muted);font-size:14px;margin:0 0 20px;line-height:1.5}
.entry-controls{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-bottom:20px}
.entry-controls label{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:5px}
.entry-controls select{font-family:var(--sans);font-size:13px;padding:3px 8px;border:none;border-radius:0;background:var(--soft);color:var(--ink)}
.example-section{margin:0}
.example-heading{font-size:13px;color:var(--muted);font-weight:600;margin:0 0 8px}
.example-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}
.example-card{
display:flex;flex-direction:column;gap:6px;text-align:left;align-items:stretch;
font-family:var(--sans);font-size:13px;font-weight:400;padding:10px 12px;border-radius:0;
border:none;background:var(--soft);color:var(--ink);cursor:pointer;
}
.example-card:hover{background:color-mix(in srgb,var(--accent) 12%,var(--soft))}
.example-card.active{background:color-mix(in srgb,var(--accent) 16%,transparent)}
.example-card .ex-card-top{display:flex;justify-content:space-between;align-items:baseline;gap:8px}
.example-card .ex-card-label{font-weight:700;color:var(--ink)}
.example-card .ex-card-size{font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}
.example-card .ex-card-blurb{font-size:12px;color:var(--muted);line-height:1.4}

#entry-grid{display:grid;gap:3px;width:max-content;max-width:100%;overflow:auto;margin:0 auto 20px}
.entry-cell{
width:var(--cell);height:var(--cell);border:1px solid var(--line2);
display:flex;flex-direction:column;background:var(--panel);border-radius:0;overflow:hidden;
}
.entry-half{
flex:1;display:flex;align-items:center;justify-content:center;cursor:text;
font-size:17px;font-weight:700;color:var(--muted);user-select:none;
}
.entry-half.half-letter{border-bottom:1px dashed var(--line)}
.entry-half:focus{outline:2px solid var(--accent);outline-offset:-2px;z-index:1;position:relative}
.entry-half.has-value{color:var(--ink)}

.entry-actions{display:flex;justify-content:center;gap:12px;margin-bottom:4px;flex-wrap:wrap}
.entry-actions button{font-size:16px;padding:8px 32px}
.entry-error{
margin-top:14px;padding:10px 14px;border-radius:0;font-size:14px;
background:color-mix(in srgb,var(--elim) 8%,transparent);
border:none;
color:var(--elim);
}
.placeholder-panel{
max-width:680px;margin:0 auto;background:var(--panel);
border:none;border-radius:0;padding:28px;
box-shadow:0 1px 0 rgba(42,37,32,.03);
}
.placeholder-panel .entry-desc{line-height:1.6}
.placeholder-panel code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px}
.muted{color:var(--muted);font-weight:400}
#solution-view{padding:0}
#solution-content{min-height:100vh}
#generate-view{padding:24px}

/* --- technique picker (shared dialog) -------------------------------------- */
.tech-picker-host{max-height:min(52vh,420px);overflow:auto;margin:2px -4px 0}
.tech-column{display:flex;flex-direction:column;gap:2px}
.tech-row{
display:flex;align-items:center;gap:8px;width:100%;padding:5px 8px;cursor:pointer;text-align:left;
font-size:13px;font-weight:400;border:none;border-radius:0;background:transparent;color:var(--ink);
}
.tech-row:hover{background:var(--soft)}
.tech-row[aria-pressed="true"]{font-weight:600}
.tech-row.is-exclude{background:color-mix(in srgb,var(--elim) 10%,transparent)}
.tech-row.is-require{background:color-mix(in srgb,var(--accent) 12%,transparent)}
.tech-row .tech-name{flex:1}
.tech-row .tech-diff{font-size:11px;color:var(--muted);font-variant-numeric:tabular-nums}
.tech-row .tech-mark{width:16px;text-align:center;font-weight:700}
.tech-row.is-exclude .tech-mark{color:var(--elim)}
.tech-row.is-require .tech-mark{color:var(--accent)}
.tech-legend{display:flex;flex-wrap:wrap;gap:14px;font-size:11px;color:var(--muted);margin-top:10px;border-top:1px dashed var(--line);padding-top:8px}
.tech-legend span{display:inline-flex;align-items:center;gap:4px}
.legend-exclude{color:var(--elim);font-weight:600}
.legend-require{color:var(--accent);font-weight:600}

/* --- puzzle generator ------------------------------------------------------ */
.gen-layout{display:grid;gap:28px;align-items:start;max-width:1120px;margin:0 auto}
#generate-view[data-gen-state="idle"] .gen-form{max-width:560px;margin:0 auto}
#generate-view[data-gen-state="result"] .gen-layout{grid-template-columns:minmax(280px,340px) minmax(0,1fr)}
@media (max-width:860px){
#generate-view[data-gen-state="result"] .gen-layout{grid-template-columns:1fr}
}
.gen-form{
background:var(--panel);padding:24px 28px;box-shadow:0 1px 0 rgba(42,37,32,.03);
}
.gen-form-head .entry-title{margin:0 0 6px}
.gen-form-head .entry-desc{margin:0}
.gen-form-body{padding-top:8px}
.ghost-btn{font-size:12px;padding:4px 10px;background:transparent;color:var(--muted);border:none;cursor:pointer;white-space:nowrap}
.ghost-btn:hover{color:var(--accent);background:var(--soft)}

.gen-field{display:flex;flex-direction:column;gap:5px;margin-bottom:16px}
.gen-field select,.gen-field input[type="number"]{
font-family:var(--sans);font-size:14px;padding:5px 8px;border:none;border-radius:0;background:var(--soft);color:var(--ink);
}
.gen-field input[type="number"]{width:100%}
.gen-field input[type="range"]{width:100%;accent-color:var(--accent);margin:0}
.gen-field-label{display:flex;justify-content:space-between;align-items:baseline;font-size:13px;font-weight:600;color:var(--ink);gap:8px;line-height:1.4}
.gen-field-label output{font-weight:400;color:var(--muted);font-variant-numeric:tabular-nums}
.gen-hint{font-size:12px;color:var(--muted);line-height:1.4}
.gen-field-check{display:grid;grid-template-columns:auto 1fr;gap:4px 8px;align-items:center}
.gen-field-check input{accent-color:var(--accent)}
.gen-check-label{font-size:13px;font-weight:600;color:var(--ink)}
.gen-field-check .gen-hint{grid-column:2}
.gen-tech-line{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink)}
.gen-budget-note{margin:0 0 16px}
.gen-advanced{margin:2px 0 18px}
.gen-advanced summary{cursor:pointer;font-size:13px;font-weight:600;color:var(--ink);user-select:none}
.gen-advanced summary:hover{color:var(--accent)}
.gen-advanced[open] summary{margin-bottom:10px}

.gen-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
#gen-go{font-size:16px;padding:8px 28px}
.gen-progress{flex:1;min-width:180px}
.gen-progress progress{width:100%;accent-color:var(--accent);height:8px;display:block}
.gen-progress-label{display:block;font-size:12px;color:var(--muted);margin-top:4px;line-height:1.5}
.gen-progress-label .gen-pl-seg{white-space:nowrap}

.gen-results{min-width:0}
.gen-result-card{
background:var(--panel);padding:28px;box-shadow:0 1px 0 rgba(42,37,32,.03);
width:100%;
}
.gen-result-title{font-family:var(--serif);font-size:24px;margin:0 0 6px;font-weight:700}
.gen-result-desc{color:var(--muted);font-size:14px;margin:0 0 20px;line-height:1.5}
.gen-result-grid-wrap{max-width:100%;overflow:auto;padding:2px;margin-bottom:20px}
.gen-result-grid{display:grid;gap:3px;width:max-content;margin:0 auto}
.gen-result-grid .entry-cell{pointer-events:none}
.gen-badges{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.gen-meta-line{font-size:12px;color:var(--muted);margin-bottom:12px;font-variant-numeric:tabular-nums}
.gen-chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.gen-histo{display:flex;flex-direction:column;gap:6px}
.hist-row{display:grid;grid-template-columns:minmax(90px,1fr) 1.8fr 24px;align-items:center;gap:8px;font-size:12px}
.hist-name{color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hist-track{background:var(--soft);height:10px}
.hist-bar{display:block;height:100%;background:var(--accent)}
.hist-count{text-align:right;color:var(--muted);font-variant-numeric:tabular-nums}
.gen-searching{font-size:13px;color:var(--accent);margin:8px 0 0;animation:gen-pulse 1.4s ease-in-out infinite}
@keyframes gen-pulse{0%,100%{opacity:.45}50%{opacity:1}}
@media (prefers-reduced-motion:reduce){.gen-searching{animation:none}}
.gen-result-actions{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
@media (max-width:520px){
#generate-view{padding:16px}
.gen-form{padding:20px}
.gen-layout{gap:20px}
.gen-actions{flex-direction:column;align-items:stretch}
#gen-go{width:100%}
.gen-progress{min-width:0}
}
.btn-danger{background:var(--elim);color:#fff}
.btn-danger:hover{background:color-mix(in srgb,var(--elim) 85%,#000)}