/* Book Treehouse: site styles */
:root {
  --teal: #1e8a86;
  --teal-deep: #136763;
  --ink: #173f3a;
  --ink-soft: #46625d;
  --leaf: #6ba368;
  --sun: #f4b942;
  --berry: #c24e6a;
  --sky: #4d86c6;
  --plum: #7a5596;
  --wood: #8a5a3b;
  --wood-dark: #6a4229;
  --page: #f2f8f7;
  --surface: #ffffff;
  --line: #d3e4e1;
  --radius: 14px;
  --max: 1160px;
  --display: "Grandstander", "Trebuchet MS", system-ui, sans-serif;
  --body: "Atkinson Hyperlegible", system-ui, -apple-system, "Segoe UI", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: var(--teal-deep); text-underline-offset: 3px; }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--sun); outline-offset: 3px; border-radius: 4px; }

h1, h2, h3 { font-family: var(--display); font-weight: 700; line-height: 1.15; margin: 0 0 .5em; color: var(--ink); }
h1 { font-size: clamp(2.1rem, 5vw, 3.3rem); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); }
h3 { font-size: 1.3rem; }
p { margin: 0 0 1em; max-width: 68ch; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 28px; } }

.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }

/* ---------- Header ---------- */
.site-header { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 50; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand img { height: 44px; width: auto; }
.brand span { font-family: var(--display); font-size: 1.35rem; font-weight: 700; }
.nav { display: flex; gap: 4px; flex-wrap: wrap; }
.nav a { text-decoration: none; color: var(--ink); font-weight: 700; padding: 8px 12px; border-radius: 999px; }
.nav a:hover { background: var(--page); }
.nav a[aria-current="page"] { background: var(--teal); color: #fff; }
.menu-btn { display: none; background: none; border: 2px solid var(--ink); border-radius: 10px; padding: 6px 12px; font: 700 1rem var(--body); color: var(--ink); cursor: pointer; }
@media (max-width: 900px) {
  .menu-btn { display: inline-block; }
  .nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: var(--surface); border-bottom: 1px solid var(--line); flex-direction: column; padding: 8px 16px 16px; }
  .nav.open { display: flex; }
  .nav a { padding: 12px; border-radius: 10px; }
}

.trade-strip { background: var(--teal); color: #fff; font-size: .95rem; text-align: center; padding: 8px 16px; }
.trade-strip a { color: #fff; font-weight: 700; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; font-family: var(--body); font-weight: 700; font-size: 1rem; text-decoration: none; padding: 12px 22px; border-radius: 999px; border: 2px solid var(--ink); background: var(--ink); color: #fff; cursor: pointer; }
.btn:hover { background: var(--teal-deep); border-color: var(--teal-deep); color: #fff; }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: #fff; }
.btn.sun { background: var(--sun); border-color: var(--sun); color: var(--ink); }
.btn.sun:hover { background: #e6a52a; border-color: #e6a52a; color: var(--ink); }

/* ---------- Hero with the bookshelf ---------- */
.hero { padding: 48px 0 24px; }
.hero .wrap { display: grid; gap: 40px; align-items: end; }
@media (min-width: 960px) { .hero .wrap { grid-template-columns: 5fr 6fr; } }
.hero p.lede { font-size: 1.2rem; color: var(--ink-soft); }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }

.shelf { position: relative; padding-top: 12px; }
.shelf-label { font-size: .95rem; color: var(--ink-soft); margin: 0 0 10px; }
.spines { display: flex; align-items: flex-end; gap: 6px; padding: 0 10px; min-height: 280px; overflow-x: auto; scrollbar-width: thin; }
.spine {
  flex: 0 0 auto; width: 54px; border-radius: 6px 6px 2px 2px; text-decoration: none; color: #fff;
  display: flex; align-items: center; justify-content: center; padding: 14px 0;
  writing-mode: vertical-rl; transform: rotate(180deg);
  font-family: var(--display); font-weight: 700; font-size: 1.05rem; letter-spacing: .01em;
  box-shadow: inset -6px 0 0 rgba(0,0,0,.12), inset 5px 0 0 rgba(255,255,255,.14);
  transition: transform .2s ease;
  position: relative;
}
.spine::after { content: ""; position: absolute; left: 8px; right: 8px; top: 12px; height: 3px; background: rgba(255,255,255,.55); border-radius: 2px; }
.spine:hover, .spine:focus-visible { transform: rotate(180deg) translateY(10px); color: #fff; }
@media (prefers-reduced-motion: reduce) { .spine { transition: none; } }
.spine.c1 { background: var(--teal); height: 250px; }
.spine.c2 { background: var(--berry); height: 222px; }
.spine.c3 { background: var(--sun); color: var(--ink); height: 268px; }
.spine.c3:hover, .spine.c3:focus-visible { color: var(--ink); }
.spine.c4 { background: var(--leaf); height: 236px; width: 60px; }
.spine.c5 { background: var(--sky); height: 258px; }
.spine.c6 { background: var(--plum); height: 214px; width: 48px; }
.spine.c7 { background: var(--ink); height: 244px; }
.plank { height: 18px; background: linear-gradient(var(--wood), var(--wood-dark)); border-radius: 4px; box-shadow: 0 8px 0 -2px rgba(106,66,41,.25); }

/* ---------- Sections ---------- */
section { padding: 48px 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.section-head h2 { margin: 0; }
.panel { background: var(--surface); border-radius: var(--radius); padding: 28px; border: 1px solid var(--line); }
.band { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* ---------- Book grid ---------- */
.book-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 28px 20px; }
@media (min-width: 720px) { .book-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); } }
.book { background: none; border: 0; padding: 0; text-align: left; cursor: pointer; font: inherit; color: inherit; display: flex; flex-direction: column; gap: 10px; }
.book .cover { aspect-ratio: 1 / 1; background: var(--surface); border-radius: 10px; display: flex; align-items: center; justify-content: center; padding: 10px; border: 1px solid var(--line); overflow: hidden; }
.book .cover img { width: 100%; height: 100%; object-fit: contain; transition: transform .25s ease; }
.book:hover .cover img { transform: scale(1.04); }
@media (prefers-reduced-motion: reduce) { .book .cover img { transition: none; } .book:hover .cover img { transform: none; } }
.book .t { font-weight: 700; line-height: 1.3; }
.book .m { font-size: .9rem; color: var(--ink-soft); }
.tag-new { display: inline-block; background: var(--sun); color: var(--ink); font-size: .8rem; font-weight: 700; padding: 2px 10px; border-radius: 999px; margin-bottom: 4px; }

.strip { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(150px, 180px); gap: 20px; overflow-x: auto; padding-bottom: 12px; scroll-snap-type: x proximity; }
.strip .book { scroll-snap-align: start; }

/* ---------- Catalogue filters ---------- */
.filters { display: grid; gap: 14px; margin-bottom: 28px; }
.search { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.search input, .search select { font: inherit; padding: 11px 14px; border: 2px solid var(--line); border-radius: 12px; background: var(--surface); color: var(--ink); min-width: 0; }
.search input { flex: 1 1 260px; }
.search input:focus, .search select:focus { border-color: var(--teal); outline: none; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { font: 700 .95rem var(--body); padding: 8px 14px; border-radius: 999px; border: 2px solid var(--line); background: var(--surface); color: var(--ink); cursor: pointer; }
.chip:hover { border-color: var(--teal); }
.chip[aria-pressed="true"] { background: var(--teal); border-color: var(--teal); color: #fff; }
.count { color: var(--ink-soft); font-size: .95rem; }
.empty { padding: 40px 0; text-align: center; color: var(--ink-soft); }

/* ---------- Book dialog ---------- */
dialog.book-dialog { border: 0; border-radius: 18px; padding: 0; width: min(760px, calc(100% - 32px)); max-height: calc(100% - 32px); color: var(--ink); background: var(--surface); }
dialog.book-dialog::backdrop { background: rgba(23,63,58,.55); }
.bd { display: grid; gap: 24px; padding: 28px; }
@media (min-width: 640px) { .bd { grid-template-columns: 240px 1fr; } }
.bd img { width: 100%; height: auto; align-self: start; border-radius: 10px; background: var(--page); }
.bd h2 { font-size: 1.6rem; margin-bottom: .3em; }
.bd .brandline { color: var(--ink-soft); margin-bottom: 14px; }
.formats { list-style: none; padding: 0; margin: 0 0 18px; display: grid; gap: 8px; }
.formats li { background: var(--page); border-radius: 10px; padding: 10px 14px; font-size: .95rem; }
.formats li b { display: block; }
.bd .cols { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }
.bd .cols a { font-size: .85rem; background: var(--page); border-radius: 999px; padding: 4px 10px; text-decoration: none; color: var(--ink); }
.close-x { position: absolute; top: 10px; right: 10px; background: var(--surface); border: 2px solid var(--line); border-radius: 999px; width: 40px; height: 40px; font-size: 1.3rem; cursor: pointer; color: var(--ink); }

/* ---------- Brand + info blocks ---------- */
.two { display: grid; gap: 24px; }
@media (min-width: 820px) { .two { grid-template-columns: 1fr 1fr; } }
.brand-card h3 { font-size: 1.6rem; }
.brand-card .stripe { height: 10px; border-radius: 999px; margin-bottom: 18px; }

.stockists { display: grid; gap: 18px; }
@media (min-width: 760px) { .stockists { grid-template-columns: 1fr 1fr; } }
.stockist h3 { margin-bottom: .3em; }
.stockist dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 4px 14px; font-size: .97rem; }
.stockist dt { font-weight: 700; color: var(--ink-soft); }
.stockist dd { margin: 0; }

.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 0 20px; margin-bottom: 10px; }
.faq summary { cursor: pointer; font-weight: 700; padding: 16px 0; list-style-position: outside; }
.faq details[open] summary { color: var(--teal-deep); }
.faq details > div { padding-bottom: 16px; }

.page-head { padding: 44px 0 12px; }
.page-head p { font-size: 1.15rem; color: var(--ink-soft); }

.team { display: flex; gap: 16px; flex-wrap: wrap; }
.person { background: var(--page); border-radius: 12px; padding: 14px 20px; }
.person b { font-family: var(--display); font-size: 1.25rem; display: block; }

.callout { background: var(--ink); color: #fff; border-radius: var(--radius); padding: 32px; display: grid; gap: 16px; align-items: center; }
@media (min-width: 820px) { .callout { grid-template-columns: 1fr auto; } }
.callout h2 { color: #fff; }
.callout p { color: #d8e8e5; margin: 0; }

ul.ticks { padding-left: 1.2em; }
ul.ticks li { margin-bottom: .4em; }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #d8e8e5; padding: 48px 0 28px; margin-top: 40px; }
.site-footer a { color: #fff; }
.foot { display: grid; gap: 28px; }
@media (min-width: 820px) { .foot { grid-template-columns: 2fr 1fr 1fr 1fr; } }
.foot h3 { color: #fff; font-size: 1.1rem; }
.foot ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.foot .small { font-size: .9rem; margin-top: 28px; border-top: 1px solid rgba(255,255,255,.15); padding-top: 18px; }

.visually-hidden { position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

.hero .wrap > * { min-width: 0; }
@media (max-width: 520px) {
  .spines { gap: 4px; padding: 0 6px; min-height: 210px; overflow: visible; }
  .spine { width: 28px !important; font-size: .8rem; padding: 10px 0; }
  .spine.c1 { height: 190px; } .spine.c2 { height: 168px; } .spine.c3 { height: 204px; }
  .spine.c4 { height: 178px; } .spine.c5 { height: 196px; } .spine.c6 { height: 162px; } .spine.c7 { height: 184px; }
  .spines .spine[style] { height: 172px !important; }
}