/* Styles for bookshelf.html. Shared styles (menu, icons, progress line) are in assets/css/site.css. */
:root{--theme:#0f6e56;--mut:#828282;--divider:#e8e8e8}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:#fff;color:#000;font-family:"Roboto",-apple-system,"Segoe UI",Helvetica,Arial,sans-serif;font-weight:300;font-size:16px;line-height:1.55}
a{color:var(--theme);text-decoration:none}
a:hover{text-decoration:underline}
a:focus-visible{outline:2px solid var(--theme);outline-offset:2px}
.navbar{position:fixed;top:0;left:0;right:0;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid var(--divider);padding-top:env(safe-area-inset-top,0px)}
.nav-inner{max-width:930px;margin:0 auto;padding:0 15px;height:56px;display:flex;align-items:center;justify-content:space-between}
.brand{font-size:1.25rem;font-weight:300;color:#000}
.brand b{font-weight:700}
.brand:hover{text-decoration:none;color:#000}
.nav-links{display:flex;gap:2px}
.nav-links a{color:#000;padding:8px 9px;font-size:15px;font-weight:400}
.nav-links a:hover{color:var(--theme);text-decoration:none}
.container{max-width:760px;margin:0 auto;padding:calc(88px + env(safe-area-inset-top,0px)) 15px 40px}
.post-title{font-size:2.6rem;font-weight:300;margin:0 0 .4rem;line-height:1.2}
.post-description{color:#444;font-size:1.04rem;margin:0;max-width:40em;line-height:1.65}
h2.sec{font-size:.78rem;font-weight:500;color:var(--mut);letter-spacing:.06em;text-transform:uppercase;margin:2.2rem 0 .6rem;padding-top:.9rem;border-top:1px solid var(--divider)}
ul.tiles{list-style:none;margin:.4rem 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(128px,1fr));gap:22px 18px}
.book{position:relative;display:flex;flex-direction:column;aspect-ratio:2/3;padding:16px 14px 14px 20px;border-radius:2px 4px 4px 2px;color:#fff; background:linear-gradient(90deg,rgba(0,0,0,.28) 0,rgba(0,0,0,.08) 7px,rgba(255,255,255,.06) 9px,rgba(255,255,255,0) 14px),var(--c); box-shadow:0 1px 2px rgba(0,0,0,.12),0 4px 10px rgba(0,0,0,.06);transition:transform .18s ease,box-shadow .18s ease}
.book::after{content:"";position:absolute;inset:7px 7px 7px 13px;border:1px solid rgba(255,255,255,.22);border-radius:1px;pointer-events:none}
.book:hover{transform:translateY(-3px);box-shadow:0 2px 4px rgba(0,0,0,.14),0 10px 20px rgba(0,0,0,.12);text-decoration:none}
.book:focus-visible{outline:2px solid var(--theme);outline-offset:3px}
.book .t{font-size:1rem;font-weight:500;line-height:1.25;letter-spacing:.005em}
.book .rule{display:block;width:22px;height:1px;background:rgba(255,255,255,.55);margin:10px 0 0}
.book .a{margin-top:auto;font-size:.72rem;font-weight:300;line-height:1.35;opacity:.88;letter-spacing:.02em}
@media(prefers-reduced-motion:reduce){
  .book{transition:none}
  .book:hover{transform:none}
}
ul.shelf{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:32px}
ul.shelf li{padding:9px 0 9px 14px;border-left:2px solid #e3ece8;margin:0 0 6px}
ul.shelf li:hover{border-left-color:var(--theme)}
ul.shelf b{font-weight:500;font-size:1.02rem;color:#111}
ul.shelf a:hover b{color:var(--theme)}
ul.shelf a:hover{text-decoration:none}
ul.shelf span{display:block;font-size:.86rem;color:var(--mut)}
.more{margin:2.4rem 0 0;padding-top:1rem;border-top:1px solid var(--divider);font-size:.92rem;color:#555}
footer{border-top:1px solid var(--divider);color:var(--mut);font-size:.8rem;text-align:center;padding:16px 15px calc(16px + env(safe-area-inset-bottom,0px));margin-top:30px}
@media(max-width:760px){
  .nav-links a{display:none}
  .post-title{font-size:2rem}
  ul.shelf{grid-template-columns:1fr}
  ul.tiles{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px 14px}
}

/* ===== Dark mode: dark-theme versions of the colors above ===== */
html[data-theme="dark"] {color-scheme:dark}
html[data-theme="dark"] {--theme:#62dabc;--mut:#888f96;--divider:#35383b}
html[data-theme="dark"] body {background:#121314;color:#e4e6e7}
html[data-theme="dark"] .navbar {background:rgba(18,19,20,0.97)}
html[data-theme="dark"] .brand {color:#e4e6e7}
html[data-theme="dark"] .brand:hover {color:#e4e6e7}
html[data-theme="dark"] .nav-links a {color:#e4e6e7}
html[data-theme="dark"] .post-description {color:#a9aeb2}
html[data-theme="dark"] .book {color:#fff;background:linear-gradient(90deg,rgba(228,230,231,0.28) 0,rgba(228,230,231,0.08) 7px,rgba(18,19,20,0.06) 9px,rgba(18,19,20,0) 14px),var(--c);box-shadow:0 1px 2px rgba(0,0,0,.12),0 4px 10px rgba(0,0,0,.06)}
html[data-theme="dark"] .book::after {border:1px solid rgba(18,19,20,0.22)}
html[data-theme="dark"] .book:hover {box-shadow:0 2px 4px rgba(0,0,0,.14),0 10px 20px rgba(0,0,0,.12)}
html[data-theme="dark"] .book .rule {background:rgba(18,19,20,0.55)}
html[data-theme="dark"] ul.shelf li {border-left:2px solid #385246}
html[data-theme="dark"] ul.shelf b {color:#d5d8da}
html[data-theme="dark"] .more {color:#9aa0a5}