:root{
  --bg:#F5F0E6; --surface:#FBF8F2; --tint:#ECE5D6; --ink:#14233B; --ink-2:#3C4A5E; --muted:#6B7484;
  --line:#D9D0BE; --teal:#0E6A6F; --teal-2:#0B5559; --sky:#CFDDE6; --navy:#0F1C30;
  --font-display:'Erode','Iowan Old Style',Georgia,serif; --font-body:'General Sans','Inter',system-ui,sans-serif;
  --text-xs:clamp(.75rem,.72rem + .15vw,.8125rem); --text-sm:clamp(.875rem,.85rem + .12vw,.9375rem);
  --text-base:clamp(1rem,.97rem + .15vw,1.0625rem); --text-lg:clamp(1.125rem,1.05rem + .35vw,1.3125rem);
  --text-xl:clamp(1.6rem,1.3rem + 1.4vw,2.4rem); --text-hero:clamp(2.6rem,1.6rem + 4.4vw,5.2rem);
  --radius:10px; --ease:cubic-bezier(.16,1,.3,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:var(--text-base);line-height:1.6;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
button,input,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:4px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--bg);padding:8px 12px;border-radius:6px;z-index:100}
.skip:focus{left:8px}
.wrap{width:min(1200px,100% - 2*clamp(1.25rem,4vw,2.5rem));margin-inline:auto}

/* header */
.header{position:sticky;top:0;z-index:50;background:rgba(245,240,230,.88);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .3s var(--ease)}
.header.is-scrolled{border-color:var(--line)}
.header__in{display:flex;align-items:center;justify-content:space-between;height:68px;gap:1rem}
.mark{display:flex;align-items:baseline;gap:.4rem;text-decoration:none;line-height:1}
.mark__name{font-family:var(--font-display);font-weight:600;font-size:1.45rem;letter-spacing:-.01em}
.mark__sub{font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--teal);font-weight:600}
.mark--light .mark__sub{color:#8FC7C4}
.nav{display:flex;align-items:center;gap:clamp(.75rem,2vw,1.75rem);font-size:var(--text-sm)}
.nav a{text-decoration:none;color:var(--ink-2);transition:color .2s}
.nav a:hover{color:var(--ink)}
.nav__cta{border:1px solid var(--ink);padding:.45rem .9rem;border-radius:999px;color:var(--ink)!important}
.nav__cta:hover{background:var(--ink);color:var(--bg)!important}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.8rem 1.35rem;border-radius:999px;font-size:var(--text-sm);font-weight:500;text-decoration:none;border:1px solid transparent;cursor:pointer;transition:background .2s,color .2s,border-color .2s,transform .2s var(--ease)}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--teal);color:#fff}
.btn--primary:hover{background:var(--teal-2)}
.btn--ghost{border-color:var(--ink);background:transparent}
.btn--ghost:hover{background:var(--ink);color:var(--bg)}

/* type */
.eyebrow{font-size:var(--text-xs);letter-spacing:.16em;text-transform:uppercase;font-weight:600;color:var(--teal);margin-bottom:.9rem}
.eyebrow--light{color:#8FC7C4}
h1,h2{font-family:var(--font-display);font-weight:500;letter-spacing:-.015em;line-height:1.05}
h1{font-size:var(--text-hero)}
h1 em{font-style:italic;color:var(--teal)}
h2{font-size:var(--text-xl);max-width:24ch;line-height:1.12}
h3{font-size:var(--text-lg);font-weight:600;line-height:1.3}
.lede{font-size:var(--text-lg);color:var(--ink-2);max-width:40ch;margin-top:1.5rem;line-height:1.5}
.sub{color:var(--ink-2);max-width:56ch;margin-top:1rem}

/* hero */
.hero{overflow:hidden;border-bottom:1px solid var(--line)}
.hero__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(2rem,5vw,4rem);align-items:center;min-height:min(86vh,820px)}
.hero__copy{padding-block:clamp(3rem,8vw,6rem)}
.hero__actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:2rem}
.stats{display:flex;gap:clamp(1.5rem,4vw,3rem);margin-top:clamp(2.5rem,5vw,3.5rem);padding-top:1.5rem;border-top:1px solid var(--line)}
.stats dt{font-size:var(--text-xs);color:var(--muted);letter-spacing:.04em}
.stats dd{font-family:var(--font-display);font-size:clamp(1.75rem,1.4rem + 1.2vw,2.4rem);font-weight:500;line-height:1.1;font-variant-numeric:tabular-nums}
.wall{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;height:min(86vh,820px);transform:rotate(-6deg) scale(1.12);transform-origin:center;mask-image:linear-gradient(transparent,#000 12%,#000 88%,transparent)}
.wall__col{display:flex;flex-direction:column;gap:14px;animation:drift 70s linear infinite}
.wall__col--rev{animation-direction:reverse;animation-duration:80s}
.wall__col img{border-radius:4px;box-shadow:0 10px 24px -12px rgba(20,35,59,.45);aspect-ratio:2/3;object-fit:cover;width:100%;background:var(--tint)}
@keyframes drift{from{transform:translateY(0)}to{transform:translateY(-50%)}}
@media (prefers-reduced-motion:reduce){.wall__col{animation:none}html{scroll-behavior:auto}}

/* sections */
.section{padding-block:clamp(4rem,9vw,7.5rem)}
.section--ink{background:var(--navy);color:#E9E4D8}
.section--ink h2{color:#F5F0E6}
.section--tint{background:var(--tint)}
.section__head{margin-bottom:clamp(2rem,4vw,3rem)}
.section__head--row{display:flex;justify-content:space-between;align-items:end;gap:1rem;flex-wrap:wrap}
.count{font-size:var(--text-sm);color:var(--muted);font-variant-numeric:tabular-nums}

/* subjects */
.subjects{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.subject{background:var(--surface);padding:1.5rem 1.4rem 1.4rem;text-align:left;border:0;cursor:pointer;display:flex;flex-direction:column;gap:1rem;min-height:220px;transition:background .25s}
.subject:hover{background:#fff}
.subject__covers{display:flex;height:96px;align-items:flex-end}
.subject__covers img{width:58px;aspect-ratio:2/3;object-fit:cover;border-radius:3px;box-shadow:0 6px 14px -8px rgba(20,35,59,.5);transition:transform .35s var(--ease)}
.subject__covers img+img{margin-left:-18px}
.subject:hover .subject__covers img:nth-child(1){transform:translateX(-4px) rotate(-3deg)}
.subject:hover .subject__covers img:nth-child(3){transform:translateX(4px) rotate(3deg)}
.subject__name{font-weight:600;font-size:var(--text-base);line-height:1.3}
.subject__n{font-size:var(--text-xs);color:var(--muted);margin-top:auto;display:flex;justify-content:space-between}
.subject__n span:last-child{color:var(--teal);font-weight:500}

/* approach */
.approach{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(2.5rem,6vw,5rem);align-items:center}
.approach__feature{position:relative;height:clamp(340px,40vw,500px)}
.approach__feature img{position:absolute;width:58%;border-radius:4px;box-shadow:0 30px 50px -20px rgba(0,0,0,.6)}
.approach__feature img:first-child{left:0;top:0;transform:rotate(-4deg)}
.approach__feature img:last-child{right:0;bottom:0;transform:rotate(5deg)}
.pillars{list-style:none;margin-top:2.25rem;display:grid;gap:1.75rem;counter-reset:p}
.pillars li{counter-increment:p;display:grid;grid-template-columns:3rem 1fr;column-gap:1rem;padding-top:1.5rem;border-top:1px solid rgba(233,228,216,.18)}
.pillars li::before{content:"0" counter(p);font-family:var(--font-display);font-size:1.5rem;color:#8FC7C4;grid-row:span 2;line-height:1.1}
.pillars h3{color:#F5F0E6}
.pillars p{color:#BFC4CC;margin-top:.35rem;max-width:52ch}

/* filters */
.filters{display:flex;flex-wrap:wrap;gap:.75rem;align-items:center;margin-bottom:2rem}
.search{display:flex;align-items:center;gap:.5rem;background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:0 1rem;flex:1 1 260px;max-width:360px;color:var(--muted)}
.search:focus-within{border-color:var(--teal)}
.search input{border:0;background:transparent;padding:.7rem 0;width:100%;outline:none;color:var(--ink);font-size:var(--text-sm)}
.chips{display:flex;flex-wrap:wrap;gap:.4rem;flex:1 1 100%;order:3}
.chip{border:1px solid var(--line);background:transparent;border-radius:999px;padding:.4rem .85rem;font-size:var(--text-xs);cursor:pointer;color:var(--ink-2);transition:all .2s}
.chip:hover{border-color:var(--ink)}
.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.select select{appearance:none;background:var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%2314233B' stroke-width='1.6'/%3E%3C/svg%3E") no-repeat right 1rem center;border:1px solid var(--line);border-radius:999px;padding:.7rem 2.5rem .7rem 1rem;font-size:var(--text-sm);cursor:pointer}

/* books */
.books{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:clamp(1.25rem,2.5vw,2rem) clamp(1rem,2vw,1.5rem)}
.book a{text-decoration:none;display:flex;flex-direction:column;gap:.75rem;height:100%}
.book__cover{aspect-ratio:2/3;border-radius:4px;overflow:hidden;background:var(--tint);box-shadow:0 12px 24px -16px rgba(20,35,59,.55);transition:transform .35s var(--ease),box-shadow .35s var(--ease)}
.book__cover img{width:100%;height:100%;object-fit:cover}
.book a:hover .book__cover{transform:translateY(-4px);box-shadow:0 20px 32px -16px rgba(20,35,59,.6)}
.book__t{font-weight:600;font-size:var(--text-sm);line-height:1.3;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.book__a{font-size:var(--text-xs);color:var(--muted);margin-top:.2rem}
.book__f{display:flex;flex-wrap:wrap;gap:.3rem;margin-top:auto}
.book__f span{font-size:.6875rem;letter-spacing:.04em;padding:.1rem .45rem;border-radius:4px;background:var(--sky);color:var(--ink)}
.empty{text-align:center;padding:3rem 1rem;color:var(--ink-2);display:grid;gap:1rem;justify-items:center}
.empty[hidden]{display:none}
.more{display:flex;justify-content:center;margin-top:3rem}
.more[hidden]{display:none}

/* authors */
.authorlist{list-style:none;columns:4 200px;column-gap:2rem}
.authorlist li{break-inside:avoid}
.authorlist button{width:100%;display:flex;justify-content:space-between;gap:1rem;background:none;border:0;border-bottom:1px solid var(--line);padding:.8rem 0;text-align:left;cursor:pointer;font-size:var(--text-sm);transition:color .2s}
.authorlist button:hover{color:var(--teal)}
.authorlist span:last-child{color:var(--muted);font-variant-numeric:tabular-nums}

/* buy */
.buy{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,4rem);align-items:center}
.formats{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.formats li{background:var(--surface);padding:1.5rem;display:flex;flex-direction:column;gap:.25rem;font-size:var(--text-sm);color:var(--muted)}
.formats__k{font-family:var(--font-display);font-size:1.5rem;color:var(--ink)}

/* footer */
.footer{background:var(--navy);color:#BFC4CC;padding-block:3rem;font-size:var(--text-sm)}
.footer .mark{color:#F5F0E6;margin-bottom:.6rem}
.footer__in{display:flex;justify-content:space-between;align-items:end;gap:2rem;flex-wrap:wrap}
.footer__legal{font-size:var(--text-xs)}

/* responsive */
@media (max-width:980px){
  .subjects{grid-template-columns:repeat(2,1fr)}
  .hero__grid{grid-template-columns:1fr;min-height:auto}
  .hero__copy{padding-bottom:1rem}
  .wall{height:340px;transform:rotate(-6deg) scale(1.15);margin-bottom:-40px}
  .approach,.buy{grid-template-columns:1fr}
  .approach__feature{max-width:420px;width:100%;margin-inline:auto}
}
@media (max-width:720px){
  .nav a:not(.nav__cta){display:none}
  .stats{gap:1.25rem}
  .subjects{grid-template-columns:1fr 1fr}
  .subject{min-height:190px;padding:1.1rem}
  .subject__covers{height:76px}
  .subject__covers img{width:46px}
  .books{grid-template-columns:repeat(2,1fr)}
  .search{max-width:none}
  .chips{flex-wrap:nowrap;overflow-x:auto;padding-bottom:.4rem;scrollbar-width:none}
  .chip{flex:none}
  .formats{grid-template-columns:1fr 1fr}
  .formats li{padding:1.1rem}
}

/* contact */
.contact{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(2rem,5vw,4rem);align-items:center}
.contact__mail{display:flex;flex-direction:column;gap:.4rem;padding:clamp(1.5rem,3vw,2.25rem);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);text-decoration:none;transition:border-color .2s,transform .3s var(--ease)}
.contact__mail:hover{border-color:var(--teal);transform:translateY(-2px)}
.contact__k{font-size:var(--text-xs);letter-spacing:.16em;text-transform:uppercase;font-weight:600;color:var(--teal)}
.contact__v{font-family:var(--font-display);font-size:clamp(1.25rem,1rem + 1.2vw,1.9rem);overflow-wrap:anywhere;line-height:1.2}
.footer__mail{color:#F5F0E6;text-underline-offset:3px}
@media (max-width:980px){.contact{grid-template-columns:1fr}}