/* fortress-library web (LIB-2): own CSS, no framework. body.eink = e-ink mode (black and white, big, no motion). */
:root { --bg: #f5f3ee; --fg: #1c1c1a; --muted: #66645e; --line: #d6d2c8; --accent: #2b5a86; --card: #fff; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg);
       font: 16px/1.6 system-ui, "Noto Sans Thai", "Sarabun", sans-serif; }
a { color: var(--accent); }
h1 { font-size: 1.5rem; line-height: 1.3; margin: 0.5rem 0 1rem; overflow-wrap: anywhere; }
h1.small { font-size: 1.1rem; margin: 0.25rem 0; }
h2 { font-size: 1.2rem; margin: 2rem 0 0.75rem; }
main { max-width: 1100px; margin: 0 auto; padding: 16px; }
.muted { color: var(--muted); }

.top { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 8px 16px;
       background: var(--card); border-bottom: 1px solid var(--line); }
.top .home { font-weight: 700; text-decoration: none; margin-right: auto; }
.top form { display: flex; gap: 4px; margin: 0; }
.top .find { flex: 1 1 220px; }
.top .find input { flex: 1; min-width: 0; }

input, button { font: inherit; color: var(--fg); background: var(--card);
                border: 1px solid var(--line); border-radius: 6px; padding: 6px 10px; }
button, .btn { cursor: pointer; }
.btn { display: inline-block; padding: 6px 14px; border: 1px solid var(--accent); border-radius: 6px;
       text-decoration: none; color: var(--accent); background: var(--card); }
.btn.main, button.main { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.off { border-color: var(--line); color: var(--muted); cursor: default; }

.grid { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px;
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
.grid a { display: block; color: var(--fg); text-decoration: none; }
.grid img, .nocover { display: block; width: 100%; aspect-ratio: 2 / 3; object-fit: cover;
                      background: var(--line); border-radius: 4px; }
.nocover { display: flex; align-items: center; justify-content: center; color: var(--muted); font-weight: 700; }
.grid .t { display: block; margin-top: 6px; font-size: 14px; line-height: 1.35; overflow-wrap: anywhere; }
.shelves { list-style: none; margin: 0; padding: 0; columns: 2 240px; }
.shelves li { margin: 4px 0; break-inside: avoid; overflow-wrap: anywhere; }
.crumbs { font-size: 14px; color: var(--muted); overflow-wrap: anywhere; }

.book { display: grid; grid-template-columns: minmax(0, 220px) minmax(0, 1fr); gap: 24px; margin-top: 12px; }
.book .cover img { width: 100%; border-radius: 4px; }
.book .cover .nocover { max-width: 220px; }
.book dl { display: grid; grid-template-columns: auto 1fr; gap: 4px 16px; }
.book dt { color: var(--muted); }
.book dd { margin: 0; overflow-wrap: anywhere; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 16px; }
.resume { width: 100%; margin: 0; font-weight: 700; }
@media (max-width: 560px) { .book { grid-template-columns: 1fr; } .book .cover { max-width: 180px; } }

.pager { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0; }
.pager form { display: flex; gap: 4px; margin: 0; }
.pager input { width: 5.5em; }
.page { overflow-x: auto; text-align: center; }
.page img { max-width: 100%; height: auto; background: #fff; }
.page.z2 img { width: 200%; max-width: none; }
img.pre { display: none; }
.chapter { max-width: 42em; margin: 0 auto; padding: 16px 20px; background: var(--card); border-radius: 6px;
           font-size: 18px; line-height: 1.8; overflow-wrap: anywhere; }
.chapter.z2 { font-size: 24px; }
.chapter img { max-width: 100%; height: auto; }

.login { max-width: 360px; margin: 10vh auto; padding: 24px; background: var(--card);
         border: 1px solid var(--line); border-radius: 8px; }
.login label { display: block; margin: 12px 0 4px; }
.login input[type=text], .login input[type=password] { width: 100%; }
.login .check { display: flex; gap: 8px; align-items: center; }
.login button { width: 100%; margin-top: 16px; padding: 10px; }
.err { color: #a00; font-weight: 700; }

body.eink { --bg: #fff; --fg: #000; --muted: #000; --line: #000; --accent: #000; --card: #fff; font-size: 20px; }
body.eink * { transition: none !important; animation: none !important; box-shadow: none !important; }
body.eink a { color: #000; }
body.eink input, body.eink button, body.eink .btn { font-size: 20px; padding: 12px 18px; border: 2px solid #000;
                                                    color: #000; background: #fff; }
body.eink .btn.main, body.eink button.main { background: #000; color: #fff; }
body.eink .btn.off { border-style: dashed; }
body.eink .grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
body.eink .grid img { filter: grayscale(1); }
body.eink .grid .t { font-size: 18px; }
body.eink .chapter { font-size: 22px; }
body.eink .chapter.z2 { font-size: 28px; }