/* /learn/ hub only. Loads after colors_and_type.css. Same paper-and-ink look as learn.css.
   Mobile first: one column, the two paths side by side from 860px. */

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:72px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--cream);color:var(--ink);font-family:var(--serif)}
a{color:var(--ink)}
.hb-brand,.hb-nav a,.hb-btn,.hb-photo{border-bottom:0}
.hb-nav .hb-signin{border-bottom:1px solid var(--ink)}
a:hover{color:var(--clay)}
img{display:block;max-width:100%;height:auto}

/* Header */
.hb-head{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px;padding-top:max(12px,env(safe-area-inset-top));background:rgba(244,236,223,0.94);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--ink-faint)}
.hb-brand{display:inline-flex;align-items:baseline;gap:10px;text-decoration:none;color:var(--ink)}
.hb-noom{font-style:italic;font-size:22px;letter-spacing:0.04em}
.hb-sub{font-family:var(--sans);font-size:10px;letter-spacing:0.22em;text-transform:uppercase;color:var(--ink-mute)}
.hb-nav{display:flex;align-items:center;gap:2px}
.hb-nav a{font-family:var(--sans);font-size:11px;letter-spacing:0.16em;text-transform:uppercase;text-decoration:none;color:var(--ink);padding:9px 10px}
.hb-nav .hb-signin{border:1px solid var(--ink);border-radius:999px;padding:8px 14px;margin-left:6px}
.hb-nav .hb-signin:hover{background:var(--ink);color:var(--cream)}
@media (max-width:420px){.hb-nav a:not(.hb-signin){display:none}}

main{max-width:1080px;margin:0 auto;padding:0 16px}

/* Type helpers */
.hb-eyebrow{font-family:var(--sans);font-size:11px;letter-spacing:0.24em;text-transform:uppercase;color:var(--clay);margin:0 0 12px}
.hb-small{font-family:var(--sans);font-size:10.5px;letter-spacing:0.2em;text-transform:uppercase;color:var(--ink-mute);margin:0 0 6px}
.hb-lede{font-style:italic;font-weight:300;font-size:clamp(19px,2.6vw,23px);line-height:1.5;color:var(--ink-soft);margin:0 0 10px;max-width:48ch}
.hb-text{font-size:18px;line-height:1.55;color:var(--ink-soft);margin:0 0 16px;max-width:58ch}
h1,h2,h3{font-weight:400;letter-spacing:-0.01em}
h1 em,h2 em{font-style:italic;font-weight:300}

/* Hero */
.hb-hero{padding:44px 0 28px;max-width:760px}
.hb-hero h1{font-size:clamp(42px,8vw,76px);line-height:1.02;margin:0 0 16px}
.hb-steps{list-style:none;display:flex;flex-wrap:wrap;gap:8px 22px;padding:0;margin:22px 0 0}
.hb-steps li{display:flex;align-items:center;gap:9px;font-size:18px;color:var(--ink-soft)}
.hb-steps b{font-weight:500;color:var(--ink)}
.hb-steps span{width:26px;height:26px;border-radius:50%;border:1px solid var(--ink-soft);display:inline-flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:12px;color:var(--ink)}

/* Buttons */
.hb-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;font-family:var(--sans);font-size:12px;font-weight:500;letter-spacing:0.18em;text-transform:uppercase;color:var(--ink);border:1px solid var(--ink);background:transparent;text-decoration:none;text-align:center;transition:background var(--dur-fast),color var(--dur-fast)}
.hb-btn.ink{background:var(--ink);color:var(--cream)}
.hb-btn.ink:hover{background:var(--clay);border-color:var(--clay);color:var(--paper)}
.hb-btn:focus-visible,.hb-quiet:focus-visible,.hb-nav a:focus-visible,summary:focus-visible{outline:2px solid var(--clay);outline-offset:2px}
.hb-quiet{font-style:italic;font-size:17px;color:var(--ink-soft);text-decoration:none;border-bottom:1px solid var(--ink-faint);padding-bottom:1px}
.hb-quiet:hover{border-bottom-color:var(--clay)}

/* Two paths */
.hb-paths{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:860px){.hb-paths{grid-template-columns:1fr 1fr;gap:24px}}
.hb-path{display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--shell);border-top:4px solid var(--pc)}
.hb-photo{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--cream-deep)}
.hb-photo img{width:100%;height:100%;object-fit:cover;transition:transform var(--dur-slow) var(--ease-slow)}
.hb-path:hover .hb-photo img{transform:scale(1.03)}
@media (prefers-reduced-motion:reduce){.hb-photo img{transition:none}.hb-path:hover .hb-photo img{transform:none}}
.hb-body{display:flex;flex-direction:column;flex:1;padding:22px 20px 24px}
.hb-path h2{font-size:clamp(34px,4.4vw,46px);line-height:1;margin:0 0 10px}
.hb-meta{font-family:var(--sans);font-size:12.5px;line-height:1.5;color:var(--ink-mute);margin:14px 0 18px}
.hb-ctas{margin-top:auto;display:flex;flex-direction:column;align-items:flex-start;gap:14px}
.hb-ctas .hb-btn{width:100%}

/* Level ladder: free levels solid, book levels quiet with a lock tag */
.hb-ladder{list-style:none;margin:6px 0 0;padding:0;border-top:1px solid var(--shell)}
.hb-ladder li{display:grid;grid-template-columns:30px 1fr auto;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--shell)}
.hb-lv{width:30px;height:30px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:12px}
.hb-lt{font-size:18px;line-height:1.25}
.hb-lt i{display:block;font-size:14.5px;color:var(--ink-mute)}
.hb-tag{font-family:var(--sans);font-size:10px;letter-spacing:0.16em;text-transform:uppercase;padding:4px 9px;border-radius:999px;white-space:nowrap}
.hb-ladder .free .hb-lv{background:var(--pc);color:var(--paper)}
.hb-ladder .free .hb-tag{background:var(--pc);color:var(--paper)}
.hb-ladder .book .hb-lv{border:1px solid var(--ink-faint);color:var(--ink-mute)}
.hb-ladder .book .hb-lt{color:var(--ink-soft)}
.hb-ladder .book .hb-tag{border:1px solid var(--ink-faint);color:var(--ink-mute)}
.hb-ladder .book .hb-tag::before{content:"";display:inline-block;width:7px;height:8px;margin-right:6px;vertical-align:-0.5px;background:currentColor;
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 7 8'%3E%3Cpath d='M1.5 3.5V2.3a2 2 0 0 1 4 0v1.2' fill='none' stroke='black'/%3E%3Crect y='3.5' width='7' height='4.5' rx='.6'/%3E%3C/svg%3E") center/contain no-repeat;
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 7 8'%3E%3Cpath d='M1.5 3.5V2.3a2 2 0 0 1 4 0v1.2' fill='none' stroke='black'/%3E%3Crect y='3.5' width='7' height='4.5' rx='.6'/%3E%3C/svg%3E") center/contain no-repeat}

/* Why free first */
.hb-why{max-width:640px;margin:0 auto;padding:64px 0 8px;text-align:center}
.hb-why h2{font-size:clamp(32px,4.6vw,48px);line-height:1.05;margin:0 0 14px}
.hb-why .hb-text{margin:0 auto}

/* Books */
.hb-books{padding:56px 0 8px;border-top:1px solid var(--ink-faint);margin-top:56px}
.hb-books h2{font-size:clamp(34px,5vw,56px);line-height:1.04;margin:0 0 12px}
.hb-shelf{display:grid;gap:20px;margin-top:28px}
@media (min-width:860px){.hb-shelf{grid-template-columns:1fr 1fr;gap:24px}}
.hb-book{display:grid;grid-template-columns:118px 1fr;gap:18px;align-items:start;background:var(--paper);border:1px solid var(--shell);padding:20px}
@media (min-width:480px){.hb-book{grid-template-columns:150px 1fr;gap:24px;padding:24px}}
.hb-cover{position:relative;aspect-ratio:210/297;background:var(--cream);border:1px solid var(--shell);box-shadow:var(--shadow-2),inset 6px 0 0 var(--pc);display:flex;flex-direction:column;justify-content:space-between;padding:14px 12px 12px 18px}
.hb-cv-noom{font-style:italic;font-size:15px;color:var(--ink-soft)}
.hb-cv-t{font-size:clamp(15px,2.2vw,19px);line-height:1.1;color:var(--ink)}
.hb-cv-t em{font-weight:300}
.hb-cv-f{font-family:var(--sans);font-size:7.5px;letter-spacing:0.2em;text-transform:uppercase;color:var(--pc)}
.hb-bk h3{font-size:clamp(24px,3vw,30px);line-height:1.1;margin:0 0 10px}
.hb-gets{list-style:none;margin:0 0 14px;padding:0}
.hb-gets li{position:relative;padding:0 0 6px 20px;font-size:16.5px;line-height:1.4;color:var(--ink-soft)}
.hb-gets li::before{content:"";position:absolute;left:2px;top:9px;width:8px;height:8px;border-radius:50%;background:var(--pc)}
.hb-price{font-size:17px;font-style:italic;color:var(--ink-mute);margin:0 0 14px}
.hb-price b{font-style:normal;font-weight:500;font-size:28px;color:var(--ink);margin-right:4px}
.hb-bk .hb-btn{width:100%;margin-bottom:14px}
.hb-bk .hb-quiet{font-size:15.5px}
@media (max-width:479px){.hb-book{grid-template-columns:120px 1fr}.hb-bk{grid-column:1/-1;grid-row:2}.hb-book .hb-cover{grid-row:1;padding:10px 8px 10px 14px}.hb-cv-noom{font-size:13px}.hb-cv-t{font-size:14px}.hb-cv-f{font-size:6.5px}}

.hb-owners{margin:22px 0 0;padding:16px 18px;border-left:4px solid var(--sand);background:var(--cream-soft)}
.hb-owners p{margin:0;font-size:17.5px;line-height:1.5;color:var(--ink-soft)}
.hb-owners b{font-weight:500;color:var(--ink)}

/* FAQ */
.hb-faq{max-width:720px;padding:64px 0 24px}
.hb-faq h2{font-size:clamp(30px,4vw,42px);margin:0 0 12px}
.hb-faq details{border-bottom:1px solid var(--ink-faint)}
.hb-faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:16px;padding:16px 0;font-size:20px;line-height:1.3}
.hb-faq summary::-webkit-details-marker{display:none}
.hb-faq summary::after{content:"+";font-family:var(--sans);font-weight:300;font-size:22px;line-height:1;color:var(--ink-mute)}
.hb-faq details[open] summary::after{content:"\2212"}
.hb-faq details p{margin:0 0 18px;font-size:17.5px;line-height:1.55;color:var(--ink-soft);max-width:60ch}

/* Footer */
.hb-foot{max-width:1080px;margin:40px auto 0;padding:28px 16px calc(36px + env(safe-area-inset-bottom));border-top:1px solid var(--ink-faint);text-align:center}
.hb-foot p{margin:0 0 8px;font-style:italic;color:var(--ink-mute);font-size:17px}
.hb-foot-links{font-family:var(--sans);font-style:normal !important;font-size:12px !important;letter-spacing:0.06em}
.hb-foot-links a{color:var(--ink-mute)}
.nw{white-space:nowrap}

/* Shelf groups: one row per path. The complete sound book gets a dark frame and a flag. */
.hb-shelf-h{grid-column:1/-1;margin:14px 0 -6px;font-family:var(--sans);font-size:11px;letter-spacing:0.2em;text-transform:uppercase;color:var(--ink)}
.hb-shelf-h:first-child{margin-top:0}
.hb-shelf-h span{display:block;margin-top:6px;font-family:var(--serif);font-style:italic;font-size:16px;letter-spacing:0;text-transform:none;color:var(--ink-mute)}
.hb-book{position:relative}
.hb-full{border:1px solid var(--ink)}
.hb-flag{position:absolute;top:-11px;right:16px;margin:0;padding:4px 11px;border-radius:999px;background:var(--ink);color:var(--cream);font-family:var(--sans);font-size:10px;letter-spacing:0.16em;text-transform:uppercase}

/* Always visible: header + promise strip stick together */
.hb-sticky{position:sticky;top:0;z-index:20}
.hb-sticky .hb-head{position:static}
.hb-strip{max-width:none;margin:0;padding:9px 16px;background:var(--ink);color:var(--cream);text-align:center;font-family:var(--sans);font-size:12.5px;line-height:1.45;letter-spacing:0.02em}
.hb-strip b{font-weight:500;color:var(--paper)}
.hb-strip span{color:#E7DAC2}
html{scroll-padding-top:110px}

/* Try free, in the hero (first screen on a phone) */
.hb-try{display:grid;gap:10px;margin:26px 0 0;max-width:620px}
@media (min-width:520px){.hb-try{grid-template-columns:1fr 1fr}}
.hb-btn.sage{background:var(--sage);border-color:var(--sage)}
.hb-try-note{margin:10px 0 0;font-family:var(--sans);font-size:12.5px;color:var(--ink-mute)}

/* "Opens every level" line on each book, the line that sells */
.hb-gets li.hb-key{color:var(--ink);font-weight:500}
.hb-gets li.hb-key::before{background:var(--ink)}
.hb-credit{margin:-6px 0 14px;font-size:15.5px;font-style:italic;color:var(--ink-soft)}

/* What you will learn, under each book */
.hb-learn{grid-column:1/-1;border-top:1px solid var(--shell);padding-top:4px}
.hb-learn summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:baseline;padding:10px 0;font-family:var(--sans);font-size:11px;letter-spacing:0.18em;text-transform:uppercase;color:var(--ink)}
.hb-learn summary::-webkit-details-marker{display:none}
.hb-learn summary span{font-family:var(--serif);font-style:italic;font-size:15px;letter-spacing:0;text-transform:none;color:var(--ink-mute)}
.hb-learn summary::after{content:"+";font-size:18px;font-weight:300;color:var(--ink-mute);margin-left:10px}
.hb-learn[open] summary::after{content:"\2212"}
.hb-learn ol{margin:4px 0 8px;padding-left:22px;counter-reset:none}
.hb-learn li{font-size:16px;line-height:1.45;color:var(--ink-soft);padding:0 0 8px 4px}
.hb-learn li::marker{font-family:var(--mono);font-size:12px;color:var(--pc)}
.hb-learn li b{font-weight:500;color:var(--ink)}

/* Sticky try-free bar on phones, after the hero buttons scroll away */
.hb-dock{display:none}
@media (max-width:859px){
  .hb-dock{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:8px;position:fixed;left:0;right:0;bottom:0;z-index:30;padding:10px 12px calc(10px + env(safe-area-inset-bottom));background:rgba(42,38,34,0.97);transform:translateY(110%);transition:transform var(--dur-med) var(--ease-slow)}
  .hb-dock.on{transform:none}
  .hb-dock p{margin:0;font-family:var(--sans);font-size:12px;line-height:1.3;color:var(--paper);font-weight:500}
  .hb-dock p span{display:block;font-weight:400;color:#E7DAC2;font-size:11px}
  .hb-dock a{border:0;font-family:var(--sans);font-size:11px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;text-decoration:none;color:var(--ink);background:var(--paper);padding:11px 12px;white-space:nowrap}
  .hb-dock a.sage{background:var(--sage);color:var(--paper)}
  .hb-foot{padding-bottom:calc(96px + env(safe-area-inset-bottom))}
}
@media (prefers-reduced-motion:reduce){.hb-dock{transition:none}}