/*
Theme Name: PDFBoi
Theme URI: https://pdfboi.com
Author: PDFBoi
Author URI: https://pdfboi.com
Description: A free Bangla ebook library theme with a 3D Bangladesh-flag-inspired design, clickable writer profiles, live search, category filters, and Google Drive download buttons. Edit assets/js/data.js to add books and writers.
Version: 1.0
Requires at least: 5.8
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: pdfboi
*/

/* =========================================================================
   PDFBoi — STYLESHEET
   Design tokens live at the top under :root. Change colors/fonts there.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Hind+Siliguri:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700&display=swap');

:root{
  /* ---- color tokens (soft, Bangladesh-flag inspired) ---- */
  --bg:            #F5FAF7;
  --bg-deep:       #EAF4EE;
  --ink:           #0B2B22;
  --ink-soft:      #4C6960;
  --green-deep:    #01402E;
  --green:         #00794F;
  --green-bright:  #17A874;
  --green-tint:    #E3F3EA;
  --red:           #E63946;
  --red-deep:      #B8202D;
  --red-tint:      #FDEAEC;
  --gold:          #D6A94A;
  --glass:         rgba(255,255,255,0.6);
  --glass-strong:  rgba(255,255,255,0.86);
  --line:          rgba(1,64,46,0.12);
  --shadow-soft:   0 20px 50px -20px rgba(1,64,46,0.25);
  --shadow-card:   0 14px 30px -16px rgba(1,64,46,0.28);

  --font-body: 'Hind Siliguri', 'Outfit', sans-serif;
  --font-ui:   'Outfit', 'Hind Siliguri', sans-serif;

  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background:
    radial-gradient(1200px 500px at 85% -10%, rgba(0,121,79,0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(230,57,70,0.07), transparent 55%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img{ max-width: 100%; display:block; }
a{ color: inherit; text-decoration: none; }
button{ font-family: inherit; cursor: pointer; }

.wrap{
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

:focus-visible{
  outline: 3px solid var(--gold);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------------------------------------------------------------------
   Flag badge — the site's recurring signature motif:
   a green field with an off-center red disc, echoing the national flag
   without literally repeating stripes everywhere.
--------------------------------------------------------------------- */
.flag-badge{
  position: relative;
  border-radius: 30% 70% 65% 35% / 40% 35% 65% 60%;
  background: linear-gradient(155deg, var(--green-bright), var(--green-deep));
  box-shadow: var(--shadow-soft);
}
.flag-badge::after{
  content:"";
  position:absolute;
  top: 26%; left: 30%;
  width: 46%; height: 46%;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #FF6B75, var(--red) 55%, var(--red-deep) 100%);
  box-shadow: 0 6px 16px rgba(184,32,45,0.45), inset 0 -4px 10px rgba(0,0,0,0.15);
}

/* ---------------------------------------------------------------------
   Top navigation
--------------------------------------------------------------------- */
.site-header{
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px) saturate(140%);
  background: rgba(245,250,247,0.78);
  border-bottom: 1px solid var(--line);
}
.nav{
  display:flex;
  align-items:center;
  gap: 20px;
  padding: 14px 0;
}
.logo{
  display:flex;
  align-items:center;
  gap: 10px;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 21px;
  color: var(--green-deep);
  letter-spacing: -0.01em;
  flex-shrink: 0;
}
.logo .flag-badge{ width: 30px; height: 30px; }
.logo b{ color: var(--red); }

.nav-search{
  flex: 1;
  max-width: 480px;
  position: relative;
}
.nav-search input{
  width: 100%;
  border: 1px solid var(--line);
  background: var(--glass-strong);
  border-radius: 999px;
  padding: 11px 44px 11px 18px;
  font-size: 15px;
  color: var(--ink);
  font-family: inherit;
  transition: box-shadow .2s ease, border-color .2s ease;
}
.nav-search input::placeholder{ color: var(--ink-soft); }
.nav-search input:focus{
  border-color: var(--green-bright);
  box-shadow: 0 0 0 4px rgba(23,168,116,0.15);
  outline: none;
}
.nav-search svg{
  position:absolute;
  right: 15px; top: 50%;
  transform: translateY(-50%);
  width: 18px; height: 18px;
  color: var(--green);
  pointer-events: none;
}

.nav-links{
  display:flex;
  gap: 18px;
  align-items:center;
  font-family: var(--font-ui);
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-soft);
  flex-shrink: 0;
}
.nav-links a{ padding: 8px 4px; border-bottom: 2px solid transparent; transition: color .2s, border-color .2s; }
.nav-links a:hover{ color: var(--green-deep); border-color: var(--gold); }

.nav-toggle{
  display:none;
  background:none;
  border:none;
  padding: 6px;
  color: var(--green-deep);
}

/* ---------------------------------------------------------------------
   Hero
--------------------------------------------------------------------- */
.hero{
  padding: 64px 0 40px;
  perspective: 1400px;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items:center;
}
.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background: var(--green-tint);
  color: var(--green-deep);
  font-family: var(--font-ui);
  font-size: 13.5px;
  font-weight: 600;
  padding: 7px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero-eyebrow .dot{
  width:7px;height:7px;border-radius:50%;
  background: var(--red);
}
.hero h1{
  font-size: clamp(34px, 4.6vw, 54px);
  line-height: 1.18;
  margin: 0 0 18px;
  font-weight: 700;
  color: var(--green-deep);
}
.hero p.lede{
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 46ch;
  margin: 0 0 30px;
}
.hero-stats{
  display:flex;
  gap: 30px;
  margin-bottom: 34px;
}
.hero-stats div b{
  display:block;
  font-family: var(--font-ui);
  font-size: 26px;
  color: var(--red-deep);
  font-weight: 700;
}
.hero-stats div span{
  font-size: 13.5px;
  color: var(--ink-soft);
}
.hero-cta{ display:flex; gap: 14px; flex-wrap: wrap; }
.btn{
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 15px;
  padding: 13px 26px;
  border-radius: 999px;
  border: none;
  display:inline-flex;
  align-items:center;
  gap: 8px;
  transition: transform .18s ease, box-shadow .18s ease;
}
.btn:hover{ transform: translateY(-2px); }
.btn-primary{
  background: linear-gradient(135deg, var(--green-bright), var(--green-deep));
  color: #fff;
  box-shadow: 0 12px 24px -10px rgba(1,64,46,0.55);
}
.btn-ghost{
  background: var(--glass-strong);
  color: var(--green-deep);
  border: 1px solid var(--line);
}

/* hero 3D graphic: floating flag disc + tilted book cards */
.hero-art{
  position: relative;
  height: 420px;
  transform-style: preserve-3d;
}
.hero-art .flag-badge.main{
  position:absolute;
  width: 260px; height: 260px;
  left: 50%; top: 46%;
  transform: translate(-50%,-50%) rotateY(-8deg) rotateX(6deg);
  animation: float-disc 7s ease-in-out infinite;
}
@keyframes float-disc{
  0%,100%{ transform: translate(-50%,-50%) rotateY(-8deg) rotateX(6deg) translateY(0px); }
  50%{ transform: translate(-50%,-50%) rotateY(-8deg) rotateX(6deg) translateY(-14px); }
}
.floating-book{
  position:absolute;
  width: 108px;
  border-radius: 10px 12px 12px 10px;
  padding: 14px 12px;
  color:#fff;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  box-shadow: 0 18px 30px -12px rgba(1,64,46,0.5);
  transform-style: preserve-3d;
}
.floating-book span{ display:block; font-family: var(--font-ui); font-size: 10.5px; font-weight: 500; opacity:.85; margin-top:6px; }
.floating-book.b1{ top: 6%; left: 2%; background: linear-gradient(160deg,#1D6FA5,#0E4C74); transform: rotate(-9deg); animation: float-a 6s ease-in-out infinite; }
.floating-book.b2{ bottom: 8%; left: 12%; background: linear-gradient(160deg,#C1272D,#7E1116); transform: rotate(7deg); animation: float-b 6.5s ease-in-out infinite; }
.floating-book.b3{ top: 12%; right: 0%; background: linear-gradient(160deg,#D6A94A,#9C7622); transform: rotate(10deg); animation: float-a 5.5s ease-in-out infinite reverse; }
.floating-book.b4{ bottom: 2%; right: 8%; background: linear-gradient(160deg,#6B4E9E,#432F68); transform: rotate(-6deg); animation: float-b 7.5s ease-in-out infinite; }
@keyframes float-a{ 0%,100%{ transform: translateY(0) rotate(-9deg);} 50%{ transform: translateY(-10px) rotate(-9deg);} }
@keyframes float-b{ 0%,100%{ transform: translateY(0) rotate(7deg);} 50%{ transform: translateY(10px) rotate(7deg);} }

/* ---------------------------------------------------------------------
   Section shell
--------------------------------------------------------------------- */
.section{ padding: 54px 0; }
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap: 20px;
  margin-bottom: 26px;
}
.section-head h2{
  font-size: clamp(22px, 2.6vw, 30px);
  color: var(--green-deep);
  margin: 0 0 6px;
  font-weight: 700;
}
.section-head p{ margin:0; color: var(--ink-soft); font-size: 15px; }
.see-all{
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  color: var(--red-deep);
  white-space: nowrap;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--red);
}

/* ---------------------------------------------------------------------
   Writer rail
--------------------------------------------------------------------- */
.writer-rail{
  display:flex;
  gap: 20px;
  overflow-x: auto;
  padding: 10px 4px 20px;
  scroll-snap-type: x proximity;
}
.writer-rail::-webkit-scrollbar{ height: 8px; }
.writer-rail::-webkit-scrollbar-thumb{ background: var(--line); border-radius: 8px; }

.writer-card{
  flex: 0 0 auto;
  width: 132px;
  text-align:center;
  scroll-snap-align: start;
  border: none;
  background: none;
  padding: 6px;
  perspective: 800px;
}
.writer-avatar{
  width: 96px; height: 96px;
  margin: 0 auto 12px;
  border-radius: 50%;
  display:flex; align-items:center; justify-content:center;
  color:#fff;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 26px;
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, box-shadow .3s ease;
  position: relative;
}
.writer-avatar::before{
  content:"";
  position:absolute; inset:-5px;
  border-radius: 50%;
  border: 2px solid var(--gold);
  opacity: 0;
  transition: opacity .3s ease, transform .3s ease;
  transform: scale(.9);
}
.writer-card:hover .writer-avatar,
.writer-card.active .writer-avatar{
  transform: rotateY(12deg) rotateX(-6deg) scale(1.05);
  box-shadow: 0 20px 30px -14px rgba(1,64,46,0.5);
}
.writer-card:hover .writer-avatar::before,
.writer-card.active .writer-avatar::before{ opacity: 1; transform: scale(1); }
.writer-avatar img{ width:100%; height:100%; object-fit:cover; border-radius:50%; }
.writer-name{
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  line-height:1.3;
}
.writer-name-en{
  font-family: var(--font-ui);
  font-size: 11px;
  color: var(--ink-soft);
  margin-top:2px;
}

/* ---------------------------------------------------------------------
   Filter chips + result meta
--------------------------------------------------------------------- */
.filter-bar{
  display:flex;
  align-items:center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.chip{
  font-family: var(--font-ui);
  font-size: 13.5px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--glass-strong);
  color: var(--ink-soft);
  transition: all .18s ease;
}
.chip:hover{ border-color: var(--green-bright); color: var(--green-deep); }
.chip.active{
  background: linear-gradient(135deg, var(--green-bright), var(--green-deep));
  color:#fff;
  border-color: transparent;
}
.result-meta{
  margin-left:auto;
  font-size: 13.5px;
  color: var(--ink-soft);
  font-family: var(--font-ui);
}
.active-writer-banner{
  display:none;
  align-items:center;
  gap:14px;
  background: var(--glass-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-card);
}
.active-writer-banner.show{ display:flex; }
.active-writer-banner .writer-avatar{ width:52px; height:52px; font-size:16px; margin:0; }
.active-writer-banner .info{ flex:1; }
.active-writer-banner .info b{ display:block; font-size: 15px; }
.active-writer-banner .info span{ font-size:13px; color: var(--ink-soft); }
.active-writer-banner button{
  background:none; border:1px solid var(--line); border-radius:999px;
  padding:7px 14px; font-family: var(--font-ui); font-size: 13px; color: var(--red-deep);
}

/* ---------------------------------------------------------------------
   Book grid
--------------------------------------------------------------------- */
.book-grid{
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 22px;
}
.book-card{
  background: var(--glass-strong);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 14px;
  box-shadow: var(--shadow-card);
  transition: transform .25s ease, box-shadow .25s ease;
  transform-style: preserve-3d;
  perspective: 700px;
}
.book-card:hover{
  transform: translateY(-6px) rotateX(3deg);
  box-shadow: 0 28px 40px -18px rgba(1,64,46,0.4);
}
.book-cover{
  aspect-ratio: 3/4;
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  padding: 16px;
  display:flex; flex-direction:column; justify-content:space-between;
  color:#fff;
  position: relative;
  overflow:hidden;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.15), 0 10px 18px -8px rgba(0,0,0,0.35);
}
.book-cover::after{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(160deg, rgba(255,255,255,0.22), transparent 55%);
}
.book-cover img{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.book-cover .cat{
  font-family: var(--font-ui);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .02em;
  background: rgba(255,255,255,0.22);
  align-self: flex-start;
  padding: 4px 9px;
  border-radius: 999px;
  position: relative; z-index: 1;
}
.book-cover .title{
  font-size: 16px;
  font-weight: 700;
  line-height: 1.3;
  position: relative; z-index: 1;
}
.book-writer{
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}
.dl-btn{
  width:100%;
  justify-content:center;
  background: var(--green-tint);
  color: var(--green-deep);
  padding: 10px 16px;
  font-size: 14px;
  border-radius: 999px;
  font-family: var(--font-ui);
  font-weight: 600;
  display:flex; align-items:center; gap:7px;
  transition: background .2s ease, color .2s ease, transform .18s ease;
}
.dl-btn:hover{ background: linear-gradient(135deg, var(--green-bright), var(--green-deep)); color:#fff; transform: translateY(-2px); }
.dl-btn svg{ width:15px; height:15px; }

.empty-state{
  text-align:center;
  padding: 60px 20px;
  color: var(--ink-soft);
  grid-column: 1/-1;
}
.empty-state .flag-badge{ width:64px; height:64px; margin: 0 auto 18px; }

/* ---------------------------------------------------------------------
   About strip
--------------------------------------------------------------------- */
.about-strip{
  background: linear-gradient(135deg, var(--green-deep), #023a2a 60%, var(--green-deep));
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 42px;
  display:grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items:center;
  position: relative;
  overflow: hidden;
}
.about-strip::before{
  content:"";
  position:absolute; top:-40%; right:-10%;
  width: 320px; height:320px; border-radius:50%;
  background: radial-gradient(circle, rgba(214,169,74,0.35), transparent 70%);
}
.about-strip h3{ font-size: 24px; margin: 0 0 10px; font-weight:700; }
.about-strip p{ margin:0; color: rgba(255,255,255,0.82); max-width: 52ch; font-size:15px; }
.about-strip .btn-primary{ background:#fff; color: var(--green-deep); }
.about-strip .btn-primary:hover{ box-shadow: 0 12px 24px -10px rgba(0,0,0,0.4); }

/* ---------------------------------------------------------------------
   Footer
--------------------------------------------------------------------- */
.site-footer{
  margin-top: 40px;
  background: var(--green-deep);
  color: rgba(255,255,255,0.75);
  position: relative;
}
.footer-wave{
  display:block;
  width:100%;
  height: 46px;
  background: var(--bg);
}
.footer-wave svg{ display:block; width:100%; height:100%; }
.footer-inner{
  padding: 44px 0 30px;
  display:grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 30px;
}
.footer-inner .logo{ color:#fff; }
.footer-inner p{ font-size: 14px; max-width: 40ch; margin-top: 10px; }
.footer-col h4{
  font-family: var(--font-ui);
  font-size: 14px;
  color:#fff;
  margin: 0 0 14px;
  font-weight: 600;
}
.footer-col a{
  display:block;
  font-size: 14px;
  padding: 6px 0;
  color: rgba(255,255,255,0.7);
  transition: color .2s;
}
.footer-col a:hover{ color: var(--gold); }
.footer-bottom{
  border-top: 1px solid rgba(255,255,255,0.12);
  padding: 18px 0 28px;
  font-size: 13px;
  text-align:center;
  color: rgba(255,255,255,0.55);
}

/* ---------------------------------------------------------------------
   Responsive
--------------------------------------------------------------------- */
@media (max-width: 900px){
  .hero-grid{ grid-template-columns: 1fr; }
  .hero-art{ height: 320px; order:-1; }
  .about-strip{ grid-template-columns: 1fr; text-align:left; }
  .footer-inner{ grid-template-columns: 1fr 1fr; }
}

@media (max-width: 680px){
  .wrap{ padding: 0 18px; }
  .nav{ flex-wrap: wrap; }
  .nav-search{ order: 3; max-width: 100%; flex-basis: 100%; }
  .nav-links{
    position: fixed;
    inset: 62px 14px auto 14px;
    background: var(--glass-strong);
    backdrop-filter: blur(16px);
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    flex-direction: column;
    align-items: flex-start;
    padding: 10px 16px;
    box-shadow: var(--shadow-soft);
    display: none;
    z-index: 50;
  }
  .nav-links.open{ display: flex; }
  .nav-toggle{ display:flex; margin-left:auto; order:2; }
  .hero{ padding: 40px 0 24px; }
  .hero-stats{ gap: 20px; }
  .hero-cta .btn{ flex:1; justify-content:center; }
  .section{ padding: 38px 0; }
  .footer-inner{ grid-template-columns: 1fr; }
  .about-strip{ padding: 30px 22px; }
  .book-grid{ grid-template-columns: repeat(auto-fill, minmax(150px,1fr)); gap:14px; }
  .book-cover .title{ font-size: 14px; }
}

@media (max-width: 420px){
  .book-grid{ grid-template-columns: repeat(2, 1fr); }
  .writer-card{ width: 108px; }
  .writer-avatar{ width: 80px; height: 80px; font-size: 20px; }
}