/* =========================================================
   THƯ VIỆN SỐ · MTTQ xã Phú Hòa Đông
   Định hướng: thư quán số — giấy dó, đỏ sơn mài, vàng son
   ========================================================= */
:root{
  --paper:#F6EEDD; --paper-2:#EFE4CD; --card:#FFFDF8;
  --ink:#2B2016; --ink-soft:#6C5B47; --ink-faint:#9C8A70;
  --line:rgba(43,32,22,.14); --line-2:rgba(43,32,22,.08);
  --red:#B0241A; --red-deep:#8A1710; --red-700:#6E1109;
  --gold:#C69A3A; --gold-deep:#A67C22; --gold-light:#E8C766; --star:#F2B01E;
  --shadow-s:0 2px 10px -4px rgba(43,32,22,.3);
  --shadow-m:0 18px 40px -22px rgba(43,32,22,.5);
  --shadow-book:0 22px 34px -18px rgba(60,20,10,.55);
  --serif:"Lora",Georgia,serif;
  --sans:"Be Vietnam Pro",system-ui,sans-serif;
  --nav-h:70px; --wrap:1120px;
  --ease:cubic-bezier(.22,.75,.2,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--paper);
  -webkit-font-smoothing:antialiased;line-height:1.6;overflow-x:hidden}
/* nền giấy dó: vân mờ + đốm sáng ấm */
body::before{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(1100px 600px at 85% -8%, rgba(198,154,58,.16), transparent 60%),
    radial-gradient(900px 500px at -5% 10%, rgba(176,36,26,.08), transparent 55%);
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
::selection{background:var(--gold-light);color:var(--ink)}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 22px}

/* ===================== NAV ===================== */
.tvs-nav{position:sticky;top:0;z-index:50;height:var(--nav-h);
  background:rgba(246,238,221,.86);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-2);transition:box-shadow .25s,background .25s}
.tvs-nav.scrolled{box-shadow:var(--shadow-s);background:rgba(246,238,221,.95)}
.nav-in{height:100%;display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:44px;height:44px;object-fit:contain;filter:drop-shadow(0 3px 6px rgba(94,10,13,.25))}
.brand-tx{display:flex;flex-direction:column;line-height:1.12}
.brand-tx strong{font-family:var(--serif);font-size:18px;font-weight:700;color:var(--red-deep);letter-spacing:.01em}
.brand-tx em{font-style:normal;font-size:11.5px;color:var(--ink-soft);font-weight:500}
.nav-links{margin-left:auto;display:flex;gap:6px}
.nav-links a{padding:8px 15px;border-radius:9px;font-size:14.5px;font-weight:600;color:var(--ink-soft);
  transition:.16s var(--ease)}
.nav-links a:hover{color:var(--red);background:rgba(176,36,26,.07)}
.nav-links a.active{color:var(--red-deep)}
.nav-cta{padding:9px 18px;border-radius:10px;font-size:14px;font-weight:700;color:#fff;
  background:linear-gradient(120deg,var(--red-deep),var(--red));box-shadow:0 10px 20px -12px rgba(138,23,16,.9);
  transition:.16s var(--ease)}
.nav-cta:hover{filter:brightness(1.07);transform:translateY(-1px)}

/* ===================== HERO ===================== */
.hero{position:relative;padding:64px 0 58px;overflow:hidden}
.hero-in{position:relative;z-index:2;text-align:center;max-width:760px}
.hero-orn{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(circle at 50% 42%, rgba(198,154,58,.14), transparent 46%)}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--gold-deep)}
.eyebrow i{width:26px;height:2px;background:linear-gradient(90deg,transparent,var(--gold-deep))}
.eyebrow::after{content:"";width:26px;height:2px;background:linear-gradient(90deg,var(--gold-deep),transparent)}
.hero-title{font-family:var(--serif);font-weight:700;font-size:clamp(34px,6vw,56px);line-height:1.1;
  margin:16px 0 0;color:var(--red-deep);letter-spacing:.005em}
.hero-title span{display:block;font-size:.5em;font-weight:600;color:var(--ink);margin-top:14px;line-height:1.32;
  font-style:italic}
.hero-sub{max-width:600px;margin:20px auto 0;font-size:16px;color:var(--ink-soft)}

.hero-search{display:flex;align-items:center;gap:8px;max-width:560px;margin:28px auto 0;
  background:var(--card);border:1.5px solid var(--line);border-radius:16px;padding:7px 7px 7px 16px;
  box-shadow:var(--shadow-m);transition:border-color .2s,box-shadow .2s}
.hero-search:focus-within{border-color:var(--red);box-shadow:0 0 0 4px rgba(176,36,26,.1),var(--shadow-m)}
.hero-search>svg{width:21px;height:21px;color:var(--ink-faint);flex:none}
.hero-search input{flex:1;min-width:0;border:none;outline:none;background:none;font-size:15.5px;
  font-family:var(--sans);color:var(--ink);font-weight:500}
.hero-search input::placeholder{color:var(--ink-faint);font-weight:400}
.hero-search button{flex:none;padding:11px 22px;border-radius:11px;font-weight:700;font-size:14.5px;color:#fff;
  background:linear-gradient(120deg,var(--red-deep),var(--red));transition:.15s var(--ease)}
.hero-search button:hover{filter:brightness(1.08)}
.hero-search button:active{transform:scale(.97)}

.hero-stats{display:inline-flex;align-items:center;gap:22px;margin-top:30px;padding:14px 26px;
  background:rgba(255,253,248,.7);border:1px solid var(--line-2);border-radius:14px}
.hero-stats .hs{display:flex;flex-direction:column;align-items:center;line-height:1}
.hero-stats .hs b{font-family:var(--serif);font-size:28px;font-weight:700;color:var(--red-deep)}
.hero-stats .hs span{font-size:12px;color:var(--ink-soft);font-weight:600;margin-top:6px;
  text-transform:uppercase;letter-spacing:.04em}
.hero-stats .sep{width:1px;height:34px;background:var(--line)}

/* ===================== COLLECTION ===================== */
.collection{padding:26px 0 60px}
.sec-head{text-align:center;max-width:620px;margin:0 auto 26px}
.sec-eyebrow{font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--gold-deep)}
.sec-head h2{font-family:var(--serif);font-size:clamp(26px,4vw,34px);font-weight:700;color:var(--red-deep);
  margin:8px 0 8px}
.sec-head p{color:var(--ink-soft);margin:0;font-size:15px}

.cats{display:flex;flex-wrap:wrap;justify-content:center;gap:9px;margin-bottom:34px}
.category-pill{padding:8px 17px;border-radius:999px;font-size:13.5px;font-weight:600;color:var(--ink-soft);
  background:var(--card);border:1.5px solid var(--line);transition:.16s var(--ease);white-space:nowrap}
.category-pill:hover{border-color:var(--gold-deep);color:var(--ink)}
.category-pill.active{color:#fff;border-color:transparent;
  background:linear-gradient(120deg,var(--red-deep),var(--red));box-shadow:0 10px 20px -12px rgba(138,23,16,.8)}

/* Kệ sách */
.shelf{display:grid;grid-template-columns:repeat(4,1fr);gap:34px 26px}
.book-card{display:flex;flex-direction:column;animation:bookin .5s var(--ease) both}
@keyframes bookin{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.book-cover{position:relative;aspect-ratio:3/4.35;border-radius:5px 9px 9px 5px;overflow:hidden;
  background:linear-gradient(135deg,var(--red-deep),var(--red));box-shadow:var(--shadow-book);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
/* gáy sách bên trái */
.book-cover::before{content:"";position:absolute;left:0;top:0;bottom:0;width:9px;z-index:3;
  background:linear-gradient(90deg,rgba(0,0,0,.35),rgba(0,0,0,.05) 60%,rgba(255,255,255,.14));
  border-right:1px solid rgba(0,0,0,.12)}
.book-cover img{width:100%;height:100%;object-fit:cover}
.book-thumb-fallback{position:absolute;inset:0;display:grid;place-items:center;padding:18px;text-align:center}
.book-thumb-title{font-family:var(--serif);color:#fff;font-size:15px;font-weight:600;line-height:1.32;
  text-shadow:0 2px 8px rgba(0,0,0,.35)}
.book-cover .cat-tag{position:absolute;top:10px;right:10px;z-index:4;font-size:10.5px;font-weight:700;
  color:var(--red-deep);background:linear-gradient(150deg,var(--gold-light),var(--gold));
  padding:3px 10px;border-radius:999px;box-shadow:0 4px 10px -4px rgba(0,0,0,.4)}
.book-card:hover .book-cover{transform:translateY(-8px) rotate(-.6deg);box-shadow:0 34px 46px -20px rgba(60,20,10,.62)}
.book-meta{padding:13px 4px 0}
.book-meta h5{font-family:var(--serif);font-size:15.5px;font-weight:600;line-height:1.34;margin:0 0 6px;
  color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.book-card:hover .book-meta h5{color:var(--red-deep)}
.book-foot{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:2px}
.book-foot .reads{display:inline-flex;align-items:center;gap:5px;font-size:12px;color:var(--ink-faint);font-weight:500}
.book-foot .reads svg{width:14px;height:14px}
.book-foot .go{font-size:12.5px;font-weight:700;color:var(--gold-deep)}

.shelf-empty{grid-column:1/-1;text-align:center;padding:50px 20px;color:var(--ink-faint)}
.shelf-skeleton{grid-column:1/-1;display:grid;grid-template-columns:repeat(4,1fr);gap:34px 26px}
.sk{aspect-ratio:3/4.35;border-radius:8px;background:linear-gradient(100deg,var(--paper-2),#fff6,var(--paper-2));
  background-size:200% 100%;animation:sk 1.3s ease-in-out infinite}
@keyframes sk{0%{background-position:200% 0}100%{background-position:-200% 0}}

.load-wrap{text-align:center;margin-top:44px}
.btn-more{padding:13px 30px;border-radius:12px;font-weight:700;font-size:14.5px;color:var(--red-deep);
  background:var(--card);border:1.5px solid var(--gold);transition:.16s var(--ease)}
.btn-more:hover{background:var(--red-deep);color:#fff;border-color:transparent}
.load-hint{margin-top:12px;font-size:12.5px;color:var(--ink-faint);font-family:var(--serif);font-style:italic}

/* ===================== ABOUT ===================== */
.about{padding:20px 0 70px}
.about-in{display:grid;grid-template-columns:1fr 1.05fr;gap:40px;align-items:center}
.about-card{background:linear-gradient(150deg,var(--red-deep),var(--red-700));border-radius:22px;padding:26px;
  color:#fff;box-shadow:var(--shadow-m);position:relative;overflow:hidden}
.about-card::after{content:"";position:absolute;right:-40px;bottom:-40px;width:180px;height:180px;
  border-radius:50%;background:radial-gradient(circle,rgba(242,176,30,.28),transparent 68%)}
.about-brand{display:flex;align-items:center;gap:14px;padding-bottom:18px;margin-bottom:18px;
  border-bottom:1px solid rgba(255,255,255,.16)}
.about-brand img{width:56px;height:56px;background:#fff;border-radius:12px;padding:5px}
.about-brand strong{display:block;font-family:var(--serif);font-size:18px;font-weight:700}
.about-brand span{font-size:13px;opacity:.85}
.about-contact{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px;position:relative;z-index:2}
.about-contact li{display:flex;flex-direction:column;gap:2px}
.about-contact .k{font-size:11px;text-transform:uppercase;letter-spacing:.1em;opacity:.7;font-weight:600}
.about-contact .v{font-size:14.5px;font-weight:500;line-height:1.4}
a.about-contact .v:hover{text-decoration:underline}
.about-tx .sec-eyebrow{color:var(--gold-deep)}
.about-tx h2{font-family:var(--serif);font-size:clamp(24px,3.4vw,32px);font-weight:700;color:var(--red-deep);margin:8px 0 14px}
.about-tx p{color:var(--ink-soft);font-size:15.5px;margin:0 0 20px}
.about-feats{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.about-feats span{display:flex;align-items:center;gap:9px;font-size:14.5px;font-weight:600;color:var(--ink)}
.about-feats i{width:20px;height:20px;flex:none;border-radius:50%;position:relative;
  background:linear-gradient(150deg,var(--gold-light),var(--gold))}
.about-feats i::after{content:"";position:absolute;left:6px;top:9px;width:4px;height:7px;
  border:2px solid var(--red-deep);border-top:0;border-left:0;transform:rotate(42deg)}

/* ===================== TRANG CHI TIẾT / ĐỌC SÁCH ===================== */
.detail{padding:40px 0 46px}
.detail-in{display:grid;grid-template-columns:290px 1fr;gap:44px;align-items:start}
.detail-cover{position:relative;aspect-ratio:3/4.35;border-radius:5px 11px 11px 5px;overflow:hidden;
  background:linear-gradient(135deg,var(--red-deep),var(--red));box-shadow:var(--shadow-book)}
.detail-cover::before{content:"";position:absolute;left:0;top:0;bottom:0;width:11px;z-index:3;
  background:linear-gradient(90deg,rgba(0,0,0,.35),rgba(0,0,0,.05) 60%,rgba(255,255,255,.14));
  border-right:1px solid rgba(0,0,0,.12)}
.detail-cover img{width:100%;height:100%;object-fit:cover}
.detail-cover .fallback{position:absolute;inset:0;display:grid;place-items:center;padding:22px;text-align:center;
  font-family:var(--serif);color:#fff;font-size:20px;font-weight:600;line-height:1.3}
.detail-info .d-eyebrow{font-size:12px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--gold-deep)}
.detail-info h1{font-family:var(--serif);font-size:clamp(26px,3.6vw,38px);font-weight:700;line-height:1.2;
  color:var(--red-deep);margin:10px 0 14px}
.detail-tags{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:6px}
.detail-tags .cat{font-size:12.5px;font-weight:700;color:var(--red-deep);padding:5px 13px;border-radius:999px;
  background:linear-gradient(150deg,var(--gold-light),var(--gold))}
.meta-chip{display:inline-flex;align-items:center;gap:7px;font-size:13px;font-weight:600;color:var(--ink-soft);
  padding:5px 13px;border-radius:999px;background:var(--card);border:1px solid var(--line)}
.meta-chip svg{width:15px;height:15px}
.detail-desc{font-size:15.5px;line-height:1.7;color:var(--ink-soft);margin:16px 0 24px;max-width:62ch}
.detail-actions{display:flex;flex-wrap:wrap;gap:12px}
.btn-read{display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:13px;font-weight:700;
  font-size:15px;color:#fff;background:linear-gradient(120deg,var(--red-deep),var(--red));
  box-shadow:0 14px 26px -14px rgba(138,23,16,.9);transition:.16s var(--ease)}
.btn-read:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-read svg{width:19px;height:19px}
.btn-back{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:13px;font-weight:600;
  font-size:14.5px;color:var(--ink);background:var(--card);border:1.5px solid var(--line);transition:.16s var(--ease)}
.btn-back:hover{border-color:var(--gold-deep);color:var(--red-deep)}
.btn-read.disabled{opacity:.5;pointer-events:none;filter:grayscale(.3)}
.detail-error{max-width:560px;margin:40px auto;background:var(--card);border:1px solid var(--line);
  border-left:4px solid var(--red);border-radius:14px;padding:24px;box-shadow:var(--shadow-s)}
.detail-error b{font-family:var(--serif);color:var(--red-deep);font-size:18px;display:block;margin-bottom:6px}
.detail-error .code{font-size:13px;color:var(--ink-faint);margin-bottom:16px}
.related{padding:6px 0 60px}
.related-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:24px}
.related-head h4{font-family:var(--serif);font-size:24px;font-weight:700;color:var(--red-deep);margin:0}
.related-head a{font-size:14px;font-weight:700;color:var(--gold-deep)}
.real3dflipbook-book{display:none}

/* ===================== FOOTER ===================== */
.tvs-foot{background:linear-gradient(180deg,#2B2016,#1E160E);color:#EddfC7;padding:38px 0 22px;margin-top:10px}
.foot-in{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  padding-bottom:22px;border-bottom:1px solid rgba(255,255,255,.1)}
.foot-brand{display:flex;align-items:center;gap:13px}
.foot-brand img{width:46px;height:46px;background:#fff;border-radius:11px;padding:4px}
.foot-brand strong{display:block;font-family:var(--serif);font-size:17px;color:#fff}
.foot-brand span{font-size:12.5px;opacity:.72}
.foot-links{display:flex;flex-wrap:wrap;gap:8px 20px}
.foot-links a{font-size:14px;font-weight:500;opacity:.85;transition:.15s}
.foot-links a:hover{opacity:1;color:var(--gold-light)}
.foot-bottom{display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;padding-top:16px;
  font-size:12.5px;opacity:.62}

/* ===================== RESPONSIVE ===================== */
@media (max-width:1000px){ .shelf,.shelf-skeleton{grid-template-columns:repeat(3,1fr)} }
@media (max-width:760px){
  .nav-links{display:none}
  .about-in{grid-template-columns:1fr;gap:26px}
  .shelf,.shelf-skeleton{grid-template-columns:repeat(2,1fr);gap:26px 18px}
  .hero{padding:44px 0 40px}
  .hero-stats{gap:16px;padding:12px 16px}
  .hero-stats .hs b{font-size:23px}
  .foot-in{flex-direction:column;align-items:flex-start}
  /* Trang chi tiết sách: xếp dọc, bìa nhỏ căn giữa */
  .detail{padding:26px 0 34px}
  .detail-in{grid-template-columns:1fr;gap:22px;justify-items:center;text-align:center}
  .detail-cover{width:172px;max-width:60%}
  .detail-info{width:100%}
  .detail-info h1{font-size:24px}
  .detail-tags{justify-content:center}
  .detail-desc{text-align:left;margin-inline:auto}
  .detail-actions{justify-content:center}
  .btn-read,.btn-back{flex:1 1 auto;justify-content:center;min-width:46%}
  .related-head h4{font-size:20px}
}
@media (max-width:400px){ .hero-stats .sep{display:none}.hero-stats{gap:14px} }
@media (prefers-reduced-motion:reduce){*{animation-duration:.001ms!important;transition-duration:.05ms!important}}