:root{--bg:#faf9f6;--ink:#292b29;--muted:#6c706a;--line:#dedfd8;--orange:#b64c12;--green:#2a5b4b}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.6 Arial,Helvetica,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}a:focus-visible,button:focus-visible{outline:3px solid #b64c12;outline-offset:5px}button,a{touch-action:manipulation}svg{fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:1.7}.shell{width:min(1120px,calc(100% - 80px));margin:auto}.header{display:flex;justify-content:space-between;align-items:center;height:94px;border-bottom:1px solid var(--line)}.brand{font-size:24px;font-weight:800;letter-spacing:-1.5px;display:inline-block;border-bottom:3px solid #d46b2c;line-height:1.1;padding-bottom:7px}.brand-note{font-size:12px;color:var(--muted)}main{padding:57px 0 54px}.eyebrow{color:var(--orange);font-size:12px;font-weight:700;letter-spacing:.16em;margin:0 0 16px}.intro h1{font-size:clamp(39px,5vw,59px);font-weight:600;letter-spacing:-.055em;line-height:1.08;margin:0}.intro>p:last-child{font-size:15px;color:var(--muted);margin:19px 0 0}.directory-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-top:43px;margin-bottom:17px}.directory-head h2{font-size:12px;font-weight:700;margin:0}.section-count{font-size:12px;color:var(--muted)}.directory{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.tile{border:1px solid var(--line);border-radius:15px;overflow:hidden;background:white;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s;min-width:0}.tile:hover{transform:translateY(-4px);box-shadow:0 15px 35px #24291c0c}.tile-top{position:relative;min-height:180px;padding:27px 29px;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden}.bitcoin .tile-top{background:#f5e6d4;color:#8e3e15}.tools .tile-top{background:#e4ece5;color:#285344}.tile-kicker{font-size:12px;font-weight:700;letter-spacing:.16em;position:relative;z-index:1}.tile-top h3{font-size:38px;letter-spacing:-.045em;line-height:1.1;margin:28px 0 0;z-index:1;max-width:75%;font-weight:600}.mark{position:absolute;right:25px;top:42px;display:grid;place-items:center;width:84px;height:84px;border:1px solid currentColor;border-radius:22px;opacity:.35;transform:rotate(10deg)}.mark.bitcoin-mark{font:64px Georgia,serif}.mark svg{width:46px;height:46px}.tile-body{padding:26px 29px 25px;flex:1;display:flex;flex-direction:column}.tile-body p{font-size:14px;line-height:1.75;color:var(--muted);margin:0 0 20px;max-width:360px}.topics{display:flex;gap:7px;flex-wrap:wrap;margin:0 0 28px}.topics span{font-size:12px;color:#63685f;background:#f5f5f1;border:1px solid #e9e9e2;padding:4px 9px;border-radius:5px}.enter{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:18px;font-size:12px;font-weight:700;margin-top:auto}.bitcoin .enter{color:var(--orange)}.tools .enter{color:var(--green)}.enter svg{width:19px;height:19px}.support{margin-top:25px;display:flex;justify-content:space-between;gap:18px;font-size:12px;color:var(--muted)}.support a{color:var(--ink);text-decoration:underline;text-underline-offset:4px;padding:3px 0}.footer{display:flex;justify-content:space-between;align-items:center;gap:20px;border-top:1px solid var(--line);padding:24px 0;font-size:12px;color:var(--muted)}.footer p{margin:0}.footer nav{display:flex;gap:24px}.footer a{min-height:44px;display:inline-flex;align-items:center}.skip{position:absolute;top:-60px;left:15px;padding:10px;background:#fff}.skip:focus{top:10px;z-index:5}[hidden]{display:none!important}
@media(max-width:650px){.shell{width:calc(100% - 36px)}.header{height:78px}.brand{font-size:22px}.brand-note{font-size:12px}main{padding:38px 0 32px}.intro h1{font-size:41px}.intro>p:last-child{font-size:14px;max-width:310px}.directory-head{margin-top:31px}.directory{grid-template-columns:1fr;gap:18px}.tile-top{min-height:157px;padding:23px 25px}.tile-top h3{font-size:35px}.mark{width:72px;height:72px;top:36px;right:24px}.mark.bitcoin-mark{font-size:54px}.tile-body{padding:23px 25px}.tile-body p{font-size:13px}.topics{margin-bottom:23px}.support{flex-direction:column;gap:4px;font-size:12px}.footer{flex-direction:column;align-items:flex-start;gap:3px;padding:21px 0 12px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}.tile:hover{transform:none}}

/* Parent homepage: approved section directory and book feature. */
:root{--bg:#fffcf7;--ink:#29261f;--line:#e4ded2;--orange:#b34b10;--green:#315b4c}
.header{height:100px}.brand-note{font-size:12px;font-weight:600;color:#635d52}main{padding-top:58px}.eyebrow{font-size:12px;letter-spacing:.17em}.intro h1{font-family:Georgia,'Times New Roman',serif;font-size:clamp(63px,7.6vw,94px);font-weight:400;line-height:1.01;letter-spacing:-.055em}.intro h1 em{color:var(--orange);font-weight:400}.intro>p:last-child{font-size:16px;line-height:1.8;margin-top:24px}.directory-head{margin-top:49px;margin-bottom:19px}.directory-head h2{font-size:14px}.tile{border-radius:8px}.tile-top{min-height:153px;padding:25px 29px}.tile-top h3{font-size:34px;margin-top:20px}.bitcoin .tile-top{background:#f2dfc5;color:#873d17}.tools .tile-top{background:#e1e9df;color:#2f5243}.mark{top:27px;width:75px;height:75px;border-radius:50%;transform:none}.mark.bitcoin-mark{font-size:54px}.tile-body{padding:24px 29px}.topics span{border-radius:3px}.support{margin-top:23px}.book-feature{display:grid;grid-template-columns:.85fr 1.15fr;gap:65px;background:#f2eade;border:1px solid #e7ddce;margin-top:65px;padding:49px 56px;border-radius:9px;align-items:center}.book-art{position:relative;min-height:360px;display:flex;flex-direction:column;align-items:center;justify-content:center;isolation:isolate}.book-art img{display:block;width:auto;height:300px;max-width:90%;object-fit:contain;transform:rotate(-5deg);filter:drop-shadow(13px 18px 12px #5d432438)}.book-art>span{font-size:12px;letter-spacing:.16em;color:#84715b;margin-top:28px;text-align:center}.book-copy .eyebrow{margin:0 0 19px}.book-copy h2{font:400 clamp(35px,4.1vw,49px)/1.12 Georgia,serif;letter-spacing:-.045em;margin:0 0 21px}.book-copy h2 em{color:var(--orange);font-weight:400}.book-copy>p{font-size:13px;color:#746859;line-height:1.8;max-width:410px}.book-copy p.book-name{font-size:13px;color:#3d342b;font-weight:700;margin:0 0 8px}.book-cta{display:inline-flex;align-items:center;justify-content:space-between;gap:30px;background:#a94812;color:white;border-radius:5px;padding:14px 18px;margin:12px 0 6px;font-size:12px;font-weight:700;min-height:48px}.book-cta:hover{background:#873b11}.book-copy p.book-disclosure{font-size:12px;line-height:1.7;color:#857968;margin-top:12px}.footer{margin-top:0}
@media(max-width:850px){.book-feature{gap:30px;padding:35px}.book-art img{height:270px}.book-art{min-height:325px}.book-copy h2{font-size:36px}}
@media(max-width:650px){.header{height:80px}.brand-note{font-size:12px}main{padding-top:37px}.intro h1{font-size:clamp(53px,12.5vw,72px)}.intro>p:last-child{font-size:14px}.directory-head{margin-top:36px}.directory-head h2{font-size:12px}.section-count{display:none}.tile-top{min-height:145px;padding:23px 25px}.tile-top h3{font-size:33px}.tile-body{padding:23px 25px}.book-feature{grid-template-columns:1fr;gap:30px;padding:29px 25px 33px;margin-top:44px}.book-art{min-height:300px}.book-art img{height:260px}.book-copy h2{font-size:39px}.book-copy>p{font-size:13px}.book-cta{display:flex;gap:15px}.book-copy .eyebrow{font-size:12px}}


/* Landing-page newsletter and book captions, kept with their owning page. */
.home-newsletter{border-top:1px solid #d9d2c6;margin-top:40px;padding:32px 0;display:flex;align-items:center;justify-content:space-between;gap:24px}.home-newsletter h2{font:400 28px Georgia,serif;margin:0 0 10px}.home-newsletter p{font-size:14px;color:#5c645d}.home-newsletter a{color:#315b4c;font-size:14px;font-weight:600;text-decoration:underline;min-height:44px;display:inline-flex;align-items:center}
@media(max-width:650px){.home-newsletter{align-items:flex-start;flex-direction:column}}
.book-art>span,.book-copy p.book-disclosure{color:#625541;font-size:13px}