/* "Double pendulum" tab. Builds on heat.css (cards, buttons, metrics); ids start with p-. */
.pend .h-mm{font-size:.85em;letter-spacing:0;font-weight:400;color:var(--fg)}
.p-stagewrap{margin:1.2rem 1.4rem .8rem}
.p-stagewrap canvas{width:100%;aspect-ratio:1.25;display:block;background:#152e4c;border-radius:3px;box-shadow:0 2px 8px #0003}
#p-caption{font-size:.8rem;color:var(--muted)}
.pend .h-opts{flex-wrap:wrap}
.pend .h-opts .h-speed{min-width:12rem}
.pend .h-settings .h-field .h-mm{margin-left:.3rem}
.p-ic .p-iclead{margin:1rem 1.4rem 0;color:var(--muted);font-size:.85rem}
.p-tablewrap{margin:1rem 1.4rem;max-height:28rem;overflow:auto;border:1px solid var(--line);border-radius:8px;background:var(--bg)}
.p-table{width:100%;border-collapse:collapse;font-size:.82rem;min-width:36rem}
.p-table th,.p-table td{padding:.45rem .7rem;text-align:left;border-bottom:1px solid var(--line)}
.p-table thead th{position:sticky;top:0;background:var(--bg);color:var(--muted);font-size:.7rem;letter-spacing:.06em;z-index:1}
.p-table tbody th{white-space:nowrap;font-family:var(--mono);color:var(--fg)}
.p-sw{display:inline-block;width:.7rem;height:.7rem;border-radius:50%;margin-right:.5rem;vertical-align:-.05rem}
.p-table td{min-width:8rem}
.pend .p-num{width:100%;font-family:var(--mono);font-size:.82rem;padding:.25rem .4rem}
.pend .p-rng{width:100%;padding:0;margin-top:.35rem;accent-color:var(--accent);display:block}
.p-copybar{display:flex;align-items:flex-end;gap:1rem;flex-wrap:wrap;margin:0 1.4rem 1.3rem}
.p-copybar .h-field{margin:0;width:10rem}
.p-copybar .h-help{flex:1 1 16rem;margin:0!important}
.p-kwrap{margin:0 1.4rem;overflow-x:auto}
.p-ks{width:100%;border-collapse:collapse;font:.78rem var(--mono)}
.p-ks th,.p-ks td{padding:.3rem .5rem;text-align:right;border-bottom:1px solid var(--line)}
.p-ks th:first-child{text-align:left;color:var(--accent)}
.p-ks tr:first-child th{color:var(--muted);font-weight:600}
.p-chartsel{margin:.4rem 1.4rem 0!important;max-width:20rem}
.p-key{display:inline-flex;align-items:center;margin-right:.9rem;font-size:.74rem}
.p-key:before{content:'';display:inline-block;width:1rem;height:2px;margin:0 .4rem 0 0;background:var(--c)}
.p-nokey{font-size:.78rem}
#p-chartkey:empty{display:none}
.pend .h-chartkey span:before{background:var(--accent)}
.pend .h-chartkey .p-key:before{background:var(--c)}
.pend .h-chartwrap canvas{height:240px}
.p-mapwrap{margin:0 1.4rem}
.p-mapwrap canvas{width:100%;aspect-ratio:1;display:block;cursor:crosshair;border-radius:3px;box-shadow:0 2px 8px #0003;background:#0a1022;image-rendering:pixelated}
.p-mapbar{display:grid;grid-template-columns:1fr 1fr;gap:0 .9rem;margin:.9rem 1.4rem 0}
.p-flipgrad{background:linear-gradient(90deg,#c2383c,#f19148,#dfd78d,#34aeb2,#24699b)!important}
.p-order{display:flex;align-items:center;gap:.35rem;white-space:nowrap}
.p-order i{display:inline-block;width:.8rem;height:.8rem;background:#0a1022;border:1px solid var(--line);border-radius:2px}
.pend .h-legend{flex-wrap:wrap}
.pend .h-eq{min-height:0}
@media (max-width:600px){.p-stagewrap{margin:1rem}.p-table td{min-width:6.5rem}}
.p-mtab th,.p-mtab td{text-align:left!important;vertical-align:top}
.p-mtab tr.p-cur th,.p-mtab tr.p-cur td{background:var(--chip)}
.p-mtab tr:first-child th{background:transparent!important}
.pend .p-key.p-dash:before{background:repeating-linear-gradient(90deg,var(--c) 0 5px,transparent 5px 8px)}
.p-exintro{color:var(--muted);font-size:.88rem;margin:.6rem 0 0}
.p-grp{margin:1.6rem 0 .6rem;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent);font-weight:700}
.p-grp:first-child{margin-top:0}
.p-ans{font-size:.88rem;color:var(--muted);line-height:1.75;padding-top:.3rem}
.p-ans p,.p-ans ol,.p-ans ul{margin:.6rem 0}
.p-ans ol,.p-ans ul{padding-left:1.3rem}
.p-ans li{margin:.45rem 0}
.p-ans strong{color:var(--fg)}
.p-ans code{font-size:.85em;background:var(--chip);padding:.05rem .3rem;border-radius:3px}
.p-ans .h-eq{overflow-x:auto;margin:.8rem 0;font-size:.92rem}
.p-ans mjx-container{color:var(--fg)}
.p-course details[open]>summary{margin-bottom:.2rem}
#p-ekey,#p-chartkey{display:flex;flex-wrap:wrap;gap:.2rem .9rem}
.pend .p-key{white-space:nowrap;margin-right:0}

.p-mapzoom{display:flex;flex-wrap:wrap;gap:.4rem;align-items:center;margin:.7rem 1.4rem 0}
.p-mapzoom button{font:inherit;font-weight:600;font-size:.88rem;min-width:2.3rem;padding:.3rem .8rem;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--fg);cursor:pointer}
.p-mapzoom button:hover{border-color:var(--accent)}
.p-mapzoom span{margin-left:.4rem}
.p-mzhint{margin:.3rem 1.4rem 0}
.p-mapwrap canvas{touch-action:none}