/* SHM widget: reference circle, spring and x–t graph ([pd_widget name="shm"]) */
/* Shared widget shell. Repeated (identically) in every widget stylesheet so each widget works on its own. */
.pdw-fig{border:1px solid var(--line);border-radius:18px;background:var(--surface);box-shadow:var(--shadow);overflow:hidden;margin:28px 0;min-width:0;max-width:100%;color:var(--ink-2);font-family:var(--f-body);font-size:16px;line-height:1.55;text-align:left;container-type:inline-size}
.pdw-fig *,.pdw-fig *::before,.pdw-fig *::after{box-sizing:border-box}
.pdw-fig p{margin:0}
.pdw-top,.pdw-foot{display:flex;justify-content:space-between;align-items:center;gap:4px 12px;flex-wrap:wrap;padding:11px 16px;font-family:var(--f-mono);font-size:.72rem;line-height:1.5;color:var(--muted)}
.pdw-top{border-bottom:1px solid var(--line)}
.pdw-top b{color:var(--ink);font-weight:500}
.pdw-foot{border-top:1px solid var(--line);font-size:.7rem}
.pdw-cv{position:relative;background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:22px 22px}
.pdw-cv canvas{display:block;width:100%;max-width:100%;margin:0;border:0}
.pdw-ctl{display:grid;gap:6px;min-width:0}
.pdw-ctl label{display:flex;justify-content:space-between;align-items:baseline;gap:8px;font-size:.84rem;font-weight:500;color:var(--ink);margin:0}
.pdw-ctl output{font-family:var(--f-mono);color:var(--accent);font-variant-numeric:tabular-nums;white-space:nowrap}
.pdw-fig input[type=range]{-webkit-appearance:none;appearance:none;display:block;width:100%;height:6px;margin:8px 0;padding:0;border:0;border-radius:99px;background:linear-gradient(90deg,var(--accent) var(--p,50%),var(--line) var(--p,50%));cursor:pointer;box-shadow:none}
.pdw-fig input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--surface);border:2px solid var(--accent);box-shadow:var(--shadow)}
.pdw-fig input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--surface);border:2px solid var(--accent)}
.pdw-fig input[type=range]:focus-visible{outline:2px solid var(--accent);outline-offset:6px}
.pdw-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;margin:0;padding:8px 14px;border-radius:999px;font-family:var(--f-body);font-weight:600;font-size:.85rem;line-height:1.3;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer;white-space:nowrap;text-decoration:none;box-shadow:none;transition:border-color .2s,color .2s,background .2s,transform .2s}
.pdw-btn:hover{border-color:var(--accent);color:var(--accent)}
.pdw-btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);box-shadow:0 6px 18px -8px var(--accent)}
.pdw-btn-primary:hover{color:var(--accent-ink);transform:translateY(-1px)}
.pdw-btn svg{transition:transform .2s}
.pdw-btn:hover svg{transform:translateX(3px)}
.pdw-fig button:focus-visible,.pdw-fig input:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.pdw-reads{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--line)}
.pdw-reads>div{padding:12px 16px;display:grid;gap:0;min-width:0}
.pdw-reads>div+div{border-left:1px solid var(--line)}
.pdw-reads span{font-size:.72rem;line-height:1.4;color:var(--muted)}
.pdw-reads b{font-family:var(--f-mono);font-weight:500;font-size:.98rem;color:var(--ink);font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
@container (max-width:620px){.pdw-reads{grid-template-columns:repeat(2,minmax(0,1fr))}.pdw-reads>div:nth-child(3){border-left:0}.pdw-reads>div:nth-child(n+3){border-top:1px solid var(--line)}}
@media (prefers-reduced-motion:reduce){.pdw-btn,.pdw-btn svg{transition:none}}
.pdw-shm canvas{height:clamp(240px,34vw,320px)}
.pdw-shm-tg{display:flex;gap:6px;flex-wrap:wrap;padding:14px 16px 16px}
.pdw-shm-tg button{font-family:var(--f-mono);font-size:.74rem;line-height:1.4;margin:0;padding:6px 12px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--muted);cursor:pointer;box-shadow:none;transition:color .2s,border-color .2s,background .2s}
.pdw-shm-tg button[aria-pressed="true"]{color:var(--c);border-color:var(--c);background:color-mix(in srgb,var(--c) 10%,transparent)}
.pdw-shm-ctrl{display:grid;grid-template-columns:1fr 1fr auto;gap:16px 22px;padding:16px;border-top:1px solid var(--line);align-items:end}
.pdw-shm-ctrl .pdw-btn{min-width:84px}
@container (max-width:620px){.pdw-shm-ctrl{grid-template-columns:1fr 1fr}.pdw-shm-ctrl .pdw-btn{grid-column:span 2}}
@container (max-width:420px){.pdw-shm-ctrl{grid-template-columns:1fr}.pdw-shm-ctrl .pdw-btn{grid-column:auto}}