/* ══════════════════════════════════════════════
   style.css — Buku Digital Luqmanulhakim
   Update versi: ubah ?v=XXXX di index.html
   ══════════════════════════════════════════════ */

:root{
  /* Light mode (default) */
  --bg:#f5f0e8;--surface:#fffdf8;--card:#f0ece0;--border:#ddd5be;
  --border-l:#c8b890;--gold:#8a6820;--gold-d:#6a5018;--gold-l:#a07828;
  --text:#2a2218;--dim:#6a5e48;--muted:#a09078;--red:#8a2525;--r:3px;
}
body.dark{
  --bg:#080705;--surface:#100e0b;--card:#161310;--border:#272318;
  --border-l:#332e20;--gold:#c8a84b;--gold-d:#836c30;--gold-l:#e5cc78;
  --text:#ede5d5;--dim:#7a7060;--muted:#3d3830;--red:#7a2525;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Jost',sans-serif;font-weight:300;background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden;-webkit-user-select:none;user-select:none}
img{pointer-events:none;-webkit-user-drag:none}
::selection{background:transparent}
::-webkit-scrollbar{width:5px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--border-l);border-radius:3px}

/* Watermark — dua lapis: halaman utama + overlay di dalam viewer PDF */
#wm{position:fixed;inset:0;pointer-events:none;z-index:8000;overflow:hidden}
#wm-pdf{
  position:absolute;inset:0;pointer-events:none;
  z-index:30;overflow:hidden;
}
.wm-row{position:absolute;white-space:nowrap;font-family:'Playfair Display',serif;font-size:13px;letter-spacing:.12em;color:rgba(200,168,75,1);transform:rotate(-22deg);transform-origin:left center}

/* DEVTOOLS BLOCK */
#dt{display:none;position:fixed;inset:0;background:var(--bg);z-index:99999;flex-direction:column;align-items:center;justify-content:center;gap:14px}
#dt.on{display:flex}
#dt .i{font-size:48px}
#dt h2{font-family:'Playfair Display',serif;font-size:28px;color:var(--gold)}
#dt p{font-size:13px;color:var(--dim);letter-spacing:.06em}

/* HEADER */
header{position:sticky;top:0;z-index:200;height:56px;border-bottom:1px solid var(--border);background:rgba(245,240,232,.93);backdrop-filter:blur(16px);padding:0 clamp(12px,4vw,72px);display:flex;align-items:center;justify-content:space-between;gap:12px}
body.dark header{background:rgba(8,7,5,.93)}
.logo{font-family:'Playfair Display',serif;font-size:18px;color:var(--gold);letter-spacing:.14em;text-transform:uppercase;display:flex;align-items:center;gap:12px;flex-shrink:0;min-width:0}
.logo-div{width:1px;height:22px;background:var(--border-l);flex-shrink:0}
.logo-sub{font-family:'Jost',sans-serif;font-weight:200;font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--dim);white-space:nowrap}
.ip-chip{font-size:10px;letter-spacing:.06em;color:var(--gold-d);border:1px solid var(--border);padding:4px 10px;border-radius:20px;display:flex;align-items:center;gap:6px;white-space:nowrap;flex-shrink:0}
.ip-dot{width:5px;height:5px;border-radius:50%;background:var(--gold);animation:pulse 2s infinite;flex-shrink:0}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.25}}
@media(max-width:420px){.ip-chip{display:none}}

/* HERO */
.hero{padding:clamp(24px,5vh,110px) clamp(16px,5vw,72px) clamp(16px,3vh,68px);max-width:1340px;margin:0 auto;display:grid;grid-template-columns:1fr auto;gap:40px;align-items:end}
.eyebrow{font-size:10px;letter-spacing:.35em;text-transform:uppercase;color:var(--gold-d);margin-bottom:12px;display:flex;align-items:center;gap:10px}
.eyebrow::before{content:'';display:block;width:22px;height:1px;background:var(--gold-d)}
h1{font-family:'Playfair Display',serif;font-size:clamp(32px,6vw,92px);font-weight:400;line-height:.93;color:var(--text);margin-bottom:14px}
h1 em{color:var(--gold);font-style:italic}
.hero-desc{max-width:460px;font-size:13px;line-height:1.7;color:var(--dim)}
.hero-stat{display:flex;flex-direction:column;gap:2px;align-items:flex-end;border-left:1px solid var(--border);padding-left:32px}
.sn{font-family:'Playfair Display',serif;font-size:clamp(34px,5vw,58px);color:var(--gold)}
.sl{font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--dim)}
@media(max-width:680px){.hero{grid-template-columns:1fr;padding:20px 16px 12px}.hero-stat{display:none}.hero-desc{display:none}}

/* TOOLBAR */
.toolbar{padding:0 clamp(16px,5vw,72px) 20px;max-width:1340px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.search-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.sbox{position:relative;flex:1;min-width:160px;max-width:440px}
.sbox input{width:100%;background:var(--card);border:1px solid var(--border);border-radius:var(--r);color:var(--text);font-family:'Jost',sans-serif;font-size:13px;font-weight:300;padding:9px 38px 9px 13px;outline:none;transition:border-color .2s;-webkit-user-select:text;user-select:text}
.sbox input:focus{border-color:var(--gold-d)}
.sbox input::placeholder{color:var(--muted)}
.si{position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:14px;pointer-events:none}
#rc{font-size:11px;color:var(--muted);letter-spacing:.06em;padding-left:2px}
.cats{display:flex;gap:6px;flex-wrap:wrap}
.cbt{background:transparent;border:1px solid var(--border);color:var(--dim);font-family:'Jost',sans-serif;font-size:10px;font-weight:400;letter-spacing:.12em;text-transform:uppercase;padding:6px 11px;border-radius:var(--r);cursor:pointer;transition:all .2s}
.cbt:hover{border-color:var(--gold-d);color:var(--gold-d)}
.cbt.on{background:var(--gold);border-color:var(--gold);color:var(--bg)}
@media(max-width:480px){.toolbar{padding:0 12px 14px}.cats{gap:5px}.cbt{font-size:9px;padding:5px 9px}}

/* Warna per kategori */
.cbt[data-c="ipas"].on{background:#4a9e8a;border-color:#4a9e8a}
.cbt[data-c="bahasa"].on{background:#7a5eb0;border-color:#7a5eb0}
.cbt[data-c="matematika"].on{background:#3a7abf;border-color:#3a7abf}
.cbt[data-c="tematik"].on{background:#c87830;border-color:#c87830}
.cbt[data-c="agama"].on{background:#8a6a20;border-color:#8a6a20}

/* SECTION */
.sec{padding:0 clamp(12px,4vw,72px) 60px;max-width:1340px;margin:0 auto}
.sec-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--border);margin-bottom:28px}
.sec-lbl{font-family:'Playfair Display',serif;font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--gold-d)}
.sec-meta{font-size:12px;color:var(--muted);letter-spacing:.05em}

/* GRID */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:clamp(12px,2vw,26px)}
@media(max-width:400px){.grid{grid-template-columns:repeat(2,1fr);gap:10px}}

/* CARD */
.card{cursor:pointer;transition:transform .25s}
.card:hover{transform:translateY(-5px)}
.card.h{display:none}
.cw{position:relative;aspect-ratio:2/3;border-radius:var(--r);overflow:hidden;background:var(--card);border:1px solid var(--border);margin-bottom:11px;box-shadow:0 8px 30px rgba(0,0,0,.45),2px 0 0 rgba(0,0,0,.6);transition:box-shadow .25s}
.card:hover .cw{box-shadow:0 18px 50px rgba(0,0,0,.55),2px 0 0 rgba(0,0,0,.6)}
.ci{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px 14px;text-align:center;position:relative}
.ci::before{content:'';position:absolute;left:0;top:0;bottom:0;width:9px;background:linear-gradient(to right,rgba(0,0,0,.4),rgba(0,0,0,.1),transparent)}
.cc{font-size:9px;letter-spacing:.24em;text-transform:uppercase;margin-bottom:12px;opacity:.7}
.ct{font-family:'Playfair Display',serif;font-size:14px;font-weight:400;line-height:1.25;margin-bottom:9px}
.cr{width:26px;height:1px;margin:0 auto 9px}
.ca{font-size:9px;letter-spacing:.1em;text-transform:uppercase;opacity:.45}
/* Cover image dari folder */
.cover-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
.ci.has-img{padding:0}
.ci.has-img .cc,.ci.has-img .ct,.ci.has-img .cr,.ci.has-img .ca{display:none}
/* kelas level/kelas badge */
.bkls{position:absolute;bottom:8px;left:8px;background:rgba(0,0,0,.6);border:1px solid rgba(255,255,255,.15);color:rgba(255,255,255,.7);font-size:8px;font-weight:400;letter-spacing:.1em;text-transform:uppercase;padding:3px 7px;border-radius:2px;backdrop-filter:blur(4px)}
.bf{position:absolute;top:8px;left:8px;background:var(--gold);color:var(--bg);font-size:8px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;padding:3px 7px;border-radius:2px}
.bl{position:absolute;top:8px;right:8px;width:27px;height:27px;border-radius:50%;background:rgba(8,7,5,.82);border:1px solid var(--gold-d);display:flex;align-items:center;justify-content:center;font-size:11px;backdrop-filter:blur(4px);transition:all .2s}
.card:hover .bl{background:var(--gold-d);border-color:var(--gold)}
.bn{position:absolute;top:8px;left:8px;background:var(--red);color:#f0c0b0;font-size:8px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;padding:3px 7px;border-radius:2px}
.bt{font-family:'Playfair Display',serif;font-size:14px;font-weight:400;color:var(--text);line-height:1.25;margin-bottom:4px}
.bau{font-size:11px;color:var(--muted);letter-spacing:.06em;margin-bottom:7px}
.tags{display:flex;gap:4px;flex-wrap:wrap}
.tag{font-size:9px;letter-spacing:.1em;text-transform:uppercase;color:var(--gold-d);border:1px solid var(--border);padding:2px 6px;border-radius:2px}

/* NO RESULTS */
#nr{display:none;padding:72px 20px;text-align:center}
#nr.on{display:block}
#nr p{font-family:'Playfair Display',serif;font-size:24px;color:var(--dim);margin-bottom:6px}
#nr small{font-size:13px;color:var(--muted)}

/* OVERLAYS */
.ov{display:none;position:fixed;inset:0;z-index:1000;background:rgba(0,0,0,.83);backdrop-filter:blur(8px);align-items:center;justify-content:center;padding:14px}
.ov.on{display:flex}

/* PASSWORD MODAL */
#pw .mb{background:var(--surface);border:1px solid var(--border-l);border-radius:6px;padding:clamp(28px,5vw,50px) clamp(24px,5vw,46px);max-width:390px;width:100%;text-align:center;animation:fup .22s ease}
@keyframes fup{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.mi{font-size:36px;margin-bottom:18px}
.mb h2{font-family:'Playfair Display',serif;font-size:24px;font-weight:400;color:var(--gold-l);margin-bottom:9px}
.mb-s{font-size:13px;color:var(--dim);line-height:1.65;margin-bottom:26px}
.pf{width:100%;background:var(--card);border:1px solid var(--border-l);border-radius:var(--r);color:var(--text);font-family:'Jost',sans-serif;font-size:15px;padding:13px;text-align:center;letter-spacing:.22em;outline:none;transition:border-color .2s;margin-bottom:7px;-webkit-user-select:text;user-select:text}
.pf:focus{border-color:var(--gold-d)}
.pf.err{border-color:var(--red);animation:sh .3s}
@keyframes sh{0%,100%{transform:translateX(0)}30%{transform:translateX(-7px)}70%{transform:translateX(7px)}}
.per{font-size:11px;color:#c06060;min-height:16px;margin-bottom:11px;letter-spacing:.04em}
.bp{width:100%;background:var(--gold);color:var(--bg);border:none;padding:13px;border-radius:var(--r);font-family:'Jost',sans-serif;font-size:12px;font-weight:500;letter-spacing:.2em;text-transform:uppercase;cursor:pointer;transition:background .2s;margin-bottom:11px}
.bp:hover{background:var(--gold-l)}
.bg2{background:none;border:none;color:var(--muted);font-family:'Jost',sans-serif;font-size:11px;letter-spacing:.12em;text-transform:uppercase;cursor:pointer;transition:color .2s}
.bg2:hover{color:var(--text)}
.ph2{margin-top:18px;padding-top:16px;border-top:1px solid var(--border);font-size:11px;color:var(--muted);letter-spacing:.04em;line-height:1.6}

/* PDF VIEWER MODAL */
#pdfv{padding:0}
#pdfv .mb{
  background:var(--surface);border:1px solid var(--border-l);
  border-radius:6px;max-width:960px;width:100%;
  overflow:hidden;animation:fup .22s ease;
  display:flex;flex-direction:column;
  height:90vh;max-height:90vh;
}
.fbh{display:flex;align-items:center;justify-content:space-between;padding:5px 10px;border-bottom:1px solid var(--border);flex-shrink:0;gap:8px}
.fbt{font-family:'Playfair Display',serif;font-size:14px;color:var(--gold-l);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1;min-width:0}
.fbc{background:none;border:none;color:var(--dim);font-size:22px;cursor:pointer;line-height:1;transition:color .2s;padding:4px 8px;flex-shrink:0}
.fbc:hover{color:var(--gold)}
/* Big back button */
.btn-back{
  width:100%;background:var(--card);border:none;border-top:1px solid var(--border);
  color:var(--text);font-family:'Jost',sans-serif;font-size:14px;
  letter-spacing:.06em;padding:8px;cursor:pointer;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;gap:8px;
  transition:background .2s;
}
.btn-back:hover{background:var(--border-l)}
@media(max-width:680px){
  #pdfv .mb{
    max-width:100%;width:100%;border-radius:0;border:none;
    height:100vh;max-height:100vh;
    padding-bottom:env(safe-area-inset-bottom,0px);
  }
  .fbh{padding:8px 10px}
  .fbt{font-size:12px}
  .pdf-controls{padding:5px 6px;gap:4px}
  .pdf-controls button{font-size:11px;padding:5px 10px}
  .fbs{min-height:260px;padding:12px 4px}
  .btn-back{font-size:13px;padding:12px}
}

/* PDF.js VIEWER — single page mode */
.pdf-wrap{flex:1;position:relative;background:#1a1814;display:flex;flex-direction:column;min-height:0;overflow:hidden}
.pdf-canvas-wrap{
  flex:1;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
  position:relative;
}
.pdf-canvas-wrap canvas{
  display:block;
  box-shadow:0 4px 24px rgba(0,0,0,.6);
  transition:opacity .15s ease;
}
.pdf-canvas-wrap canvas.fading{opacity:0}
/* side arrows */
.pdf-arrow{
  position:absolute;top:50%;transform:translateY(-50%);
  background:rgba(0,0,0,.5);border:1px solid rgba(255,255,255,.12);
  color:rgba(255,255,255,.7);font-size:24px;
  width:36px;height:60px;border-radius:4px;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;transition:all .18s;z-index:20;
  -webkit-tap-highlight-color:transparent;
  user-select:none;-webkit-user-select:none;
}
.pdf-arrow:hover,.pdf-arrow:active{background:rgba(200,168,75,.35);color:var(--gold)}
.pdf-arrow:disabled{opacity:.2;cursor:not-allowed}
.pdf-arrow.left{left:0}
.pdf-arrow.right{right:0}
/* controls bar */
.pdf-controls{
  display:flex;align-items:center;justify-content:center;gap:6px;
  padding:7px 8px;background:rgba(8,7,5,.97);
  border-top:1px solid var(--border);flex-shrink:0;flex-wrap:wrap;
}
.pdf-controls button{
  background:var(--card);border:1px solid var(--border);color:var(--text);
  font-family:'Jost',sans-serif;font-size:12px;
  padding:6px 14px;border-radius:var(--r);cursor:pointer;
  transition:all .2s;white-space:nowrap;
}
.pdf-controls button:hover{border-color:var(--gold-d);color:var(--gold)}
.pdf-controls button:disabled{opacity:.3;cursor:not-allowed}
.pdf-pginfo{font-size:13px;color:var(--dim);letter-spacing:.06em;white-space:nowrap}
.pdf-pginput{
  width:44px;background:var(--card);border:1px solid var(--border);
  color:var(--text);font-family:'Jost',sans-serif;font-size:13px;
  padding:5px 4px;border-radius:var(--r);text-align:center;outline:none;
  -webkit-user-select:text;user-select:text;
}
.pdf-pginput:focus{border-color:var(--gold-d)}
/* loading state */
.pdf-loading{
  position:absolute;inset:0;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:14px;
  background:#2a2620;color:var(--dim);font-size:13px;
  letter-spacing:.06em;
}
.pdf-spinner{
  width:36px;height:36px;border:3px solid var(--border);
  border-top-color:var(--gold);border-radius:50%;
  animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.pdf-err{
  position:absolute;inset:0;display:none;flex-direction:column;
  align-items:center;justify-content:center;gap:12px;
  background:#2a2620;color:var(--dim);font-size:13px;text-align:center;padding:24px;
}
.pdf-err.on{display:flex}
.pdf-err span{font-size:36px}

/* Flipbook (fallback jika tidak ada PDF) */
.fbs{background:#0b0a08;padding:26px 10px;display:flex;align-items:center;justify-content:center;gap:10px;min-height:470px}
.fn{background:none;border:1px solid var(--border);color:var(--dim);width:36px;height:36px;border-radius:50%;cursor:pointer;font-size:17px;flex-shrink:0;transition:all .2s;display:flex;align-items:center;justify-content:center}
.fn:hover{border-color:var(--gold);color:var(--gold)}
.fn:disabled{opacity:.18;cursor:not-allowed}
.spread{display:flex;flex:1;max-width:760px;box-shadow:0 26px 72px rgba(0,0,0,.62);border-radius:1px}
.pg{flex:1;min-height:420px;background:#f7f4ed;color:#2a2218;padding:clamp(22px,4vw,42px);position:relative;overflow:hidden}
.pg.pl{border-right:2px solid #ccc3a8;box-shadow:inset -9px 0 22px rgba(0,0,0,.07)}
.pg.pr{box-shadow:inset 9px 0 18px rgba(0,0,0,.04)}
.pg::before{content:'';position:absolute;top:0;bottom:0;pointer-events:none}
.pl::before{right:0;width:7px;background:linear-gradient(to left,rgba(0,0,0,.06),transparent)}
.pr::before{left:0;width:7px;background:linear-gradient(to right,rgba(0,0,0,.04),transparent)}
.pgn{position:absolute;bottom:14px;font-family:'Jost',sans-serif;font-size:10px;color:#9a9080;letter-spacing:.1em}
.pl .pgn{left:clamp(18px,4vw,38px)}
.pr .pgn{right:clamp(18px,4vw,38px)}
.pch{font-family:'Jost',sans-serif;font-size:9px;letter-spacing:.28em;text-transform:uppercase;color:#8a7860;margin-bottom:14px;padding-bottom:11px;border-bottom:1px solid #ddd5be}
.ph3{font-family:'Playfair Display',serif;font-size:clamp(16px,3vw,24px);font-weight:500;color:#1a1208;line-height:1.2;margin-bottom:12px}
.pp{font-family:'Jost',sans-serif;font-size:13px;font-weight:300;line-height:1.85;color:#3a3228;margin-bottom:11px}
.pp.dc::first-letter{font-family:'Playfair Display',serif;font-size:50px;float:left;line-height:.82;margin-right:7px;margin-top:5px;color:#8a6f30}
.pq{border-left:2px solid #c9a050;padding-left:13px;font-style:italic;color:#5a4c38;font-size:13px;line-height:1.7;margin:13px 0;font-family:'Playfair Display',serif}
.pg.fo{animation:flo .28s cubic-bezier(.55,0,.45,1) forwards}
.pg.fi{animation:fli .28s cubic-bezier(.55,0,.45,1) forwards}
@keyframes flo{from{transform:rotateY(0);opacity:1}to{transform:rotateY(-65deg);opacity:0}}
@keyframes fli{from{transform:rotateY(65deg);opacity:0}to{transform:rotateY(0);opacity:1}}
.fbf{padding:11px 20px;border-top:1px solid var(--border);display:flex;align-items:center;gap:14px;flex-shrink:0}
.fpn{font-size:11px;color:var(--muted);letter-spacing:.08em;white-space:nowrap}
.fpr{flex:1;height:2px;background:var(--border);border-radius:2px;overflow:hidden}
.fpb{height:100%;background:var(--gold);border-radius:2px;transition:width .3s}
@media(max-width:560px){.spread{flex-direction:column}.pl{border-right:none;border-bottom:2px solid #ccc3a8}}

/* FOOTER */
footer{border-top:1px solid var(--border);padding:22px clamp(16px,5vw,72px);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
footer p{font-size:11px;color:var(--muted);letter-spacing:.07em}
.fip{font-size:11px;color:var(--gold-d);letter-spacing:.05em}

/* WA BUTTON */
#wa-btn{
  position:fixed;bottom:20px;right:16px;z-index:9500;
  display:flex;align-items:center;gap:9px;
  background:#25d366;color:#fff;
  border:none;border-radius:50px;
  padding:13px 18px 13px 14px;
  font-family:'Jost',sans-serif;font-size:13px;font-weight:400;letter-spacing:.04em;
  cursor:pointer;text-decoration:none;
  box-shadow:0 4px 20px rgba(37,211,102,.4);
  transition:all .25s;
  -webkit-tap-highlight-color:transparent;
}
#wa-btn:hover{background:#1ebe5d;transform:translateY(-2px)}
#wa-btn svg{width:20px;height:20px;flex-shrink:0}
.wa-label{white-space:nowrap}
@media(max-width:480px){
  .wa-label{display:none}
  #wa-btn{padding:14px;border-radius:50%;bottom:18px;right:14px;box-shadow:0 4px 16px rgba(37,211,102,.5)}
}

/* THEME TOGGLE */
#theme-btn{
  background:var(--card);border:1px solid var(--border-l);color:var(--text);
  font-family:'Jost',sans-serif;font-size:11px;font-weight:400;
  letter-spacing:.1em;text-transform:uppercase;
  padding:6px 14px;border-radius:20px;cursor:pointer;
  display:flex;align-items:center;gap:7px;
  transition:all .25s;flex-shrink:0;white-space:nowrap;
}
#theme-btn:hover{border-color:var(--gold);color:var(--gold)}
#theme-btn .ti{font-size:14px;line-height:1}
@media(max-width:480px){#theme-btn .tl{display:none}#theme-btn{padding:7px 10px}}

/* TOAST */
#toast{position:fixed;bottom:26px;left:50%;transform:translateX(-50%) translateY(12px);background:var(--card);border:1px solid var(--border-l);color:var(--text);font-size:13px;padding:10px 22px;border-radius:30px;opacity:0;pointer-events:none;transition:all .27s;z-index:9999;white-space:nowrap}
#toast.on{opacity:1;transform:translateX(-50%) translateY(0)}