@font-face{font-family:"BP Serif";src:url(/fonts/BPSerif-var-latin.woff2) format("woff2");font-weight:400 700;font-display:swap}
:root{--bg:#fbfcfd;--surface:#eef3f8;--text:#14202e;--muted:#4a5a6c;--soft:#2f3f52;--accent:#1e5fa8;--accent-dark:#174a84;--accent-ink:#ffffff;--ink:#13263d;--inhale:#a8c3e0;--border:#d5dde8;--rule:#e4e9f0;--radius:8px;--card:12px;--max:43rem;--wide:72rem;--font:-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;--head:"BP Serif",Charter,"Bitstream Charter","Sitka Text",Cambria,Georgia,serif;--ease:cubic-bezier(.23,1,.32,1);color-scheme:light}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:1.1875rem/1.65 var(--font);text-rendering:optimizeLegibility;-webkit-tap-highlight-color:transparent}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-underline-offset:.2em;text-decoration-thickness:1px}
@media (hover:hover) and (pointer:fine){a:hover{color:var(--accent-dark)}}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:4px}
h1,h2,h3{font-family:var(--head);font-weight:600;line-height:1.18;letter-spacing:-.005em;margin:2.25rem 0 .75rem;text-wrap:balance}
h1{font-size:clamp(2rem,5vw,3.25rem);line-height:1.1;margin:.5rem 0 .75rem}
h2{font-size:clamp(1.5rem,3.2vw,1.8rem)}
h3{font-size:1.25rem}
p{text-wrap:pretty}
.bp-skip{position:absolute;left:-999px;top:0;background:var(--accent);color:var(--accent-ink);padding:.75rem 1rem;z-index:10}
.bp-skip:focus{left:0}
.bp-wrap{width:min(100% - 2rem,var(--wide));margin-inline:auto}
.bp-col{width:min(100% - 2rem,var(--max));margin-inline:auto}
.bp-wave{display:block;width:100%;height:30px;overflow:visible}
.bp-wave path{fill:none;stroke:var(--accent);stroke-width:4;stroke-linecap:round;vector-effect:non-scaling-stroke}
.bp-wave .bp-in{stroke:var(--inhale)}
.bp-wave .bp-hold{stroke:var(--border)}
.bp-top{border-bottom:1px solid var(--rule)}
.bp-top .bp-wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;column-gap:2rem}
.bp-mark{display:inline-flex;align-items:center;gap:.7rem;min-height:3.75rem;color:var(--text);text-decoration:none;font:600 1.25rem/1 var(--head)}
.bp-logo{width:2.1rem;height:auto;flex:none;overflow:visible}
.bp-menu{display:flex;gap:1.6rem;font-size:1.0625rem}
.bp-menu a{display:inline-flex;align-items:center;min-height:44px;color:var(--text);text-decoration:none;white-space:nowrap}
.bp-menu a[aria-current]{color:var(--accent);font-weight:600}
@media (max-width:40rem){.bp-top .bp-wrap{width:100%;padding-left:1rem}.bp-menu{width:100%;gap:1.25rem;overflow-x:auto;scrollbar-width:none;padding-right:1rem;margin-top:-.4rem;-webkit-mask-image:linear-gradient(90deg,#000 88%,transparent);mask-image:linear-gradient(90deg,#000 88%,transparent)}.bp-menu::-webkit-scrollbar{display:none}}
.bp-crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:0 .5rem;padding:0;margin:1rem 0 0;font-size:.9rem;color:var(--muted)}
.bp-crumbs li{display:flex;align-items:center}
.bp-crumbs li+li::before{content:"/";margin-right:.5rem}
.bp-crumbs a{color:var(--muted);display:inline-flex;align-items:center;min-height:44px}
.bp-kicker{font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-weight:700;margin:.5rem 0 0}
.bp-kicker a{color:inherit;text-decoration:none;display:inline-flex;align-items:center;min-height:44px}
.bp-lede{font-size:1.25rem;line-height:1.55;color:var(--soft);margin:0 0 1.25rem}
.bp-by{border-block:1px solid var(--rule);padding:.9rem 0;margin:0 0 1.5rem;font-size:.95rem;line-height:1.5}
.bp-by p{margin:0}
.bp-by-1{font-weight:600}
.bp-by-1 a{color:var(--text)}
.bp-by-2{color:var(--muted)}
.bp-by-3{color:var(--text);font-weight:600;margin-top:.3rem!important}
.bp-when{color:var(--muted);font-size:.875rem;margin-top:.35rem!important}
.bp-cover{margin:0 0 1.5rem}
.bp-cover img{border-radius:var(--radius);width:100%}
.bp-answer{background:var(--surface);border-radius:var(--card);padding:1.25rem 1.25rem 1.1rem;margin:0 0 1.5rem}
.bp-answer p{margin:0}
.bp-label{font-size:.78rem;letter-spacing:.12em;text-transform:uppercase;font-weight:700;color:var(--accent);margin:0 0 .4rem!important}
.bp-answer .bp-wave{margin-top:1rem}
.bp-counts{display:flex;justify-content:space-between;font-size:.85rem;color:var(--muted);margin-top:.35rem!important}
.bp-contents{border:1px solid var(--rule);border-radius:var(--radius);padding:0 1.1rem;margin:0 0 1.75rem}
.bp-contents summary{cursor:pointer;font-weight:600;min-height:48px;display:flex;align-items:center}
.bp-contents ol{margin:0 0 .9rem;padding-left:1.25rem;font-size:1rem}
.bp-contents a{display:block;padding:.35rem 0}
.bp-prose h2{scroll-margin-top:1rem}
.bp-prose li{margin:.45rem 0}
.bp-prose>ol{list-style:none;padding:0;counter-reset:step}
.bp-prose>ol>li{counter-increment:step;position:relative;padding-left:3rem;margin:.95rem 0;min-height:2rem}
.bp-prose>ol>li::before{content:counter(step);position:absolute;left:0;top:-.05rem;width:2rem;height:2rem;border-radius:var(--radius);background:var(--accent);color:var(--accent-ink);font:600 .95rem/2rem var(--font);text-align:center}
.bp-prose table{border-collapse:collapse;width:100%;font-size:.95rem;display:block;overflow-x:auto}
.bp-prose th,.bp-prose td{border-bottom:1px solid var(--rule);padding:.6rem .75rem;text-align:left;vertical-align:top}
@media (max-width:40rem){.bp-prose table{font-size:.875rem;line-height:1.45}.bp-prose th,.bp-prose td{padding:.55rem .5rem;min-width:5.5rem}}
.bp-prose th{background:var(--surface)}
.bp-prose img{border-radius:var(--radius);margin:1.5rem 0}
.bp-prose blockquote{margin:1.5rem 0;padding:0 0 0 1.25rem;font:1.3rem/1.45 var(--head)}
.bp-study{border:1px solid var(--border);border-radius:var(--card);padding:1.25rem 1.4rem;margin:1.5rem 0;display:grid;gap:1rem 1.5rem;grid-template-columns:repeat(auto-fit,minmax(9rem,1fr));align-items:start}
.bp-stat{display:flex;flex-direction:column;gap:.15rem;margin:0}
.bp-stat b{font:600 2.25rem/1 var(--head);color:var(--text)}
.bp-stat span{font-size:.9rem;color:var(--muted);line-height:1.4}
.bp-study-head{display:flex;flex-direction:column;gap:.2rem}
.bp-study-head p{margin:0}
.bp-study-src{font-size:.9rem;color:var(--muted)}
.bp-study-text{font-size:1rem;line-height:1.55;color:var(--soft);margin:0;grid-column:1/-1}
@media (min-width:56rem){.bp-home-study{grid-template-columns:3fr 2fr 2fr 5fr;align-items:center;padding:1.6rem 2rem}.bp-home-study .bp-study-text{grid-column:auto}}
.bp-pattern{background:var(--ink);color:var(--bg);border-radius:var(--card);padding:1.5rem;margin:2.5rem 0}
.bp-pattern .bp-label{color:var(--inhale)}
.bp-pattern-name{font:600 1.6rem/1.2 var(--head);margin:0 0 1.1rem}
.bp-track{position:relative;padding:.4rem 9px}
.bp-track .bp-wave{height:34px}
.bp-track .bp-wave path{stroke:var(--inhale);stroke-width:5}
.bp-track .bp-wave .bp-in{stroke:rgba(168,195,224,.45)}
.bp-track .bp-wave .bp-hold{stroke:rgba(251,252,253,.25)}
.bp-ride{position:absolute;top:.4rem;bottom:.4rem;left:9px;right:9px;pointer-events:none;opacity:0;animation:none}
.bp-lift{position:absolute;left:0;bottom:-5px;animation:none}
.bp-dot{display:block;width:18px;height:18px;margin-left:-9px;border-radius:50%;background:var(--bg);box-shadow:0 0 0 4px rgba(251,252,253,.18)}
.bp-segs{display:flex;gap:4px;list-style:none;padding:0;margin:.4rem 0 1.25rem;font-size:.85rem;color:#c3cfdd}
.bp-segs li{margin:0;min-width:0}
.bp-segs b{color:var(--bg);font-weight:600}
.bp-go{position:absolute;opacity:0;pointer-events:none}
.bp-go-label,.bp-app{display:inline-flex;align-items:center;min-height:48px;padding:.6rem 1.35rem;border-radius:24px;line-height:1.3;font-weight:600;font-size:1rem;text-decoration:none;cursor:pointer;transition:transform 160ms var(--ease);user-select:none}
.bp-go-label{background:var(--bg);color:var(--ink)}
.bp-go-label::after{content:"Tap to breathe along"}
.bp-go:checked~.bp-acts .bp-go-label::after{content:"Stop"}
.bp-go:focus-visible~.bp-acts .bp-go-label{outline:3px solid var(--inhale);outline-offset:3px}
.bp-go:checked~.bp-track .bp-ride{opacity:1;animation:bp-across var(--cycle) linear infinite}
.bp-go:checked~.bp-track .bp-lift{animation:var(--lift) var(--cycle) cubic-bezier(.42,0,.58,1) infinite}
.bp-hidden .bp-ride,.bp-hidden .bp-lift{animation-play-state:paused!important}
@keyframes bp-across{from{transform:translateX(0)}to{transform:translateX(100%)}}
.bp-acts{display:flex;flex-wrap:wrap;gap:.6rem}
.bp-app{border:1px solid rgba(251,252,253,.4);color:var(--bg)}
.bp-go-label:active,.bp-app:active,.bp-btn:active,.bp-pace-go:active{transform:scale(.97)}
.bp-pattern .bp-note{color:#c3cfdd}
.bp-note{font-size:.85rem;color:var(--muted);margin:.75rem 0 0}
.bp-btn{display:inline-flex;align-items:center;min-height:48px;padding:0 1.35rem;background:var(--accent);color:var(--accent-ink);border-radius:999px;font-weight:600;text-decoration:none;transition:transform 160ms var(--ease)}
@media (hover:hover) and (pointer:fine){.bp-btn:hover,.bp-pace-go:hover{color:var(--accent-ink);background:var(--accent-dark)}}
.bp-faq details{border-bottom:1px solid var(--rule)}
.bp-faq summary{cursor:pointer;font-weight:600;padding:.9rem 0;min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:1rem;list-style:none}
.bp-faq summary::-webkit-details-marker{display:none}
.bp-faq summary::after{content:"+";font:400 1.5rem/1 var(--font);color:var(--accent);flex:none}
.bp-faq details[open] summary::after{content:"\2212"}
.bp-faq details p{margin:0 0 1.1rem}
.bp-sources ol{padding-left:1.25rem;font-size:.95rem}
.bp-sources li{margin:.5rem 0}
.bp-chips,.bp-tags{list-style:none;display:flex;flex-wrap:wrap;gap:.5rem;padding:0;margin:1.5rem 0}
.bp-chips a,.bp-tags a{display:inline-flex;align-items:center;min-height:44px;padding:0 1rem;border-radius:999px;background:var(--surface);color:var(--text);text-decoration:none;font-size:.95rem}
.bp-tags a{border-radius:var(--radius);font-size:.9rem}
.bp-chips a[aria-current]{background:var(--accent);color:var(--accent-ink)}
.bp-disclaimer{border:1px solid var(--border);border-radius:var(--card);padding:1.1rem 1.25rem;font-size:.95rem;line-height:1.6;color:var(--soft);margin:1.5rem 0}
.bp-disclaimer strong{color:var(--text)}
.bp-author{display:flex;gap:1.1rem;align-items:center;background:var(--surface);border-radius:var(--card);padding:1.25rem;margin-top:2rem}
.bp-author p{margin:0;line-height:1.45}
.bp-face{flex:none;width:72px;height:72px;border-radius:50%;object-fit:cover;background:var(--border);box-shadow:0 0 0 3px var(--bg),0 0 0 4px var(--border);display:flex;align-items:center;justify-content:center;font:600 1.3rem/1 var(--head);color:var(--soft)}
.bp-author-small{font-size:.875rem;color:var(--muted)}
.bp-author-name{font:600 1.3rem/1.2 var(--head)}
.bp-author-name a{color:var(--text);text-decoration:none}
.bp-author-role{font-size:.95rem}
.bp-cards{display:grid;gap:1.25rem;grid-template-columns:repeat(auto-fill,minmax(16rem,1fr));margin:1.25rem 0 3rem;padding:0;list-style:none}@media (min-width:56rem){.bp-cards{grid-template-columns:repeat(3,1fr);gap:1.5rem}}
.bp-vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.bp-more{text-align:center;margin:-1.25rem 0 3rem}
.bp-more .bp-btn{min-height:44px;padding:0 3.5rem;font-size:.9375rem}
@media (max-width:40rem){.bp-more .bp-btn{min-height:48px}}
.bp-card{position:relative;display:flex;flex-direction:column;background:var(--surface);border-radius:var(--card);overflow:hidden;margin:0}
.bp-card img{width:100%;aspect-ratio:1200/630;object-fit:cover}
.bp-card-in{padding:1.15rem 1.3rem 1.35rem;display:flex;flex-direction:column;gap:.4rem}
.bp-card-cat{font-size:.85rem;color:var(--muted);margin:0}
.bp-card h3{margin:0;font-size:1.3rem;line-height:1.28}
.bp-card h3 a{color:var(--text);text-decoration:none}
.bp-card h3 a::after{content:"";position:absolute;inset:0;border-radius:var(--card)}
.bp-card-meta{font-size:.85rem;color:var(--muted);margin:0}
@media (hover:hover) and (pointer:fine){.bp-card h3 a:hover{color:var(--accent)}}
.bp-related h2{margin-top:3rem}
.bp-portrait{display:block;width:100%;max-width:20rem;height:auto;border-radius:var(--card);margin:.5rem 0 1.5rem;background:var(--surface)}
@media (min-width:48rem){.bp-portrait{float:right;width:17rem;margin:.4rem 0 1.25rem 2rem}}
.bp-home{display:grid;gap:1.75rem;padding:1.75rem 0 1rem;align-items:start}
.bp-home h1{max-width:15ch}
.bp-home-intro .bp-lede{max-width:36rem}
.bp-teacher{display:flex;align-items:center;gap:.85rem;font-size:1rem;line-height:1.45;color:var(--muted)}
.bp-teacher .bp-face{width:52px;height:52px;font-size:1rem}
.bp-teacher p{margin:0}
.bp-edu{display:inline-block;margin:1.1rem 0 0;font-size:.95rem;line-height:1.4;color:var(--soft);border:1px solid var(--border);border-radius:999px;padding:.45rem 1rem}
.bp-pace{background:var(--surface);border-radius:var(--card);padding:1.5rem 1.4rem}
.bp-pace-title{font:600 1.65rem/1.2 var(--head);margin:0 0 .85rem}
.bp-pace ol{margin:0 0 1.1rem;padding-left:1.35rem;font-size:1.1rem;line-height:1.55}
.bp-pace li{margin:.2rem 0}
.bp-pace .bp-wave{margin:0 0 .9rem}
.bp-pace .bp-note{font-size:.95rem;margin:0 0 1.1rem}
.bp-pace-go{display:inline-flex;align-items:center;justify-content:center;text-align:center;min-height:48px;padding:.6rem 1.35rem;border-radius:24px;line-height:1.3;background:var(--accent);color:var(--accent-ink);font-weight:600;text-decoration:none;transition:transform 160ms var(--ease)}
@media (max-width:40rem){.bp-pace-go{display:flex}}
@media (min-width:56rem){.bp-home{grid-template-columns:7fr 5fr;gap:3rem;padding:4rem 0 1.5rem}.bp-home-intro{padding-top:.5rem}}
.bp-home-study{margin:2.5rem 0 0}
.bp-head-row h2,.bp-need h2{margin:2.75rem 0 0}
.bp-head-row{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;flex-wrap:wrap}
.bp-head-row a{font-size:1.0625rem}
.bp-hero{padding:2.5rem 0 .5rem}
.bp-hero h1{max-width:20ch}
.bp-foot{background:var(--ink);color:var(--bg);margin-top:4rem;padding:2.5rem 0 2rem}
.bp-foot p{margin:0 0 1rem}
.bp-closing{font:400 clamp(1.3rem,3vw,1.55rem)/1.4 var(--head);max-width:32rem}
.bp-foot nav{display:flex;flex-wrap:wrap;gap:0 1.5rem}
.bp-foot nav a{display:inline-flex;align-items:center;min-height:44px;color:var(--bg)}
.bp-legal{font-size:.85rem;color:#c3cfdd}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.bp-go,.bp-go-label,.bp-ride{display:none}}
@media print{.bp-top,.bp-foot,.bp-related,.bp-acts{display:none}.bp-pattern{background:none;color:var(--text);border:1px solid var(--border)}}