.head-row{display:flex;justify-content:space-between;align-items:center;width:100%;text-align:left;background:transparent;border:0;border-bottom:1px solid var(--rule);padding:18px 0;color:var(--ink);font:inherit;cursor:pointer;gap:12px}.head-row strong,.head-row small{display:block}.head-row strong{font-size:var(--type-16);line-height:1.55}.head-row small{font-size:var(--type-14);color:var(--ink-soft);margin:5px 0;line-height:1.6}.head-quote strong{font-weight:400;font-size:var(--type-20)}.head-corner details>summary{padding:20px 0;min-height:48px;cursor:pointer;font-weight:600}.head-support{margin-top:24px;padding-top:12px;border-top:1px solid var(--rule)}.head-support h3{font-size:var(--type-20)}.head-support a,.head-page a{color:var(--amber)}.head-support .fld{max-width:300px}.head-support p{line-height:1.6}.head-modal{position:fixed;inset:0;z-index:12000;overflow:auto;display:block;background:var(--paper);padding:24px 20px calc(32px + env(safe-area-inset-bottom))}.head-page{max-width:640px;margin:0 auto}.head-page>h2{font-size:var(--type-28);line-height:1.2;margin:24px 0}.head-page p{line-height:1.7}.head-page blockquote{font-size:var(--type-28);margin:40px 0 24px;line-height:1.65}.head-meta{font-size:var(--type-14);color:var(--ink-soft)}.head-breath-ring{width:220px;height:220px;border:5px solid var(--amber);border-radius:50%;margin:42px auto 22px;display:grid;place-items:center}.head-breath-ring span{font-variant-numeric:tabular-nums;font-size:var(--type-28)}.head-phase{text-align:center;min-height:48px;font-size:var(--type-20)}.head-page [data-breath-time]{text-align:center}.head-page [data-breath-start],.head-page [data-breath-end]{width:100%;margin-top:10px}.head-caution{border:1px solid var(--rule);border-radius:12px;padding:16px}.head-page button:focus-visible,.head-row:focus-visible{outline:2px solid var(--amber);outline-offset:3px}@media(prefers-reduced-motion:reduce){.head-breath-ring{transition:none;animation:none}}

/* Head uses a full-screen page, not the shared translucent modal backdrop. */
html.vr-app .modal.head-modal{background:var(--paper);color:var(--ink);backdrop-filter:none;-webkit-backdrop-filter:none}
html.vr-app .head-page a{color:color-mix(in srgb,var(--amber) 88%,var(--ink));text-underline-offset:3px}

/* Animate only the outline; the countdown and surrounding layout stay still. */
.head-breath-ring{position:relative;border:0;--breath-scale:.72}
.head-breath-ring::before,.head-breath-ring::after{content:"";position:absolute;inset:0;border-radius:50%;pointer-events:none}
.head-breath-ring::before{border:5px solid var(--amber);transform:scale(var(--breath-scale));transform-origin:center;will-change:transform}
.head-breath-ring::after{border:1px solid var(--rule)}
.head-breath-count{position:relative;z-index:1;display:grid;justify-items:center;gap:4px;line-height:1.2}
.head-breath-count small{font-size:var(--type-14);color:var(--ink-soft)}
@media(prefers-reduced-motion:reduce){.head-breath-ring::before{transform:scale(.86);will-change:auto}}