/* ============================================================
   THE PIXEL ARCHIVE — Retro Game CSS
   Press Start 2P + VT323 (Latin) | Cairo (Arabic)
   Dark + Light themes | LTR + RTL layouts
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&family=VT323&family=Cairo:wght@300;400;600;700&display=swap');

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  /* Dark theme (default) */
  --bg:        #07070f;
  --bg2:       #0e0e1c;
  --bg3:       #141428;
  --card:      #11111e;
  --card-h:    #1a1a2e;

  --green:     #00ff88;
  --green-dim: #00cc6a;
  --orange:    #ff6b00;
  --blue:      #3d9fff;
  --purple:    #9b5de5;
  --red:       #ff4444;
  --yellow:    #ffd700;

  --text:      #e0e0f0;
  --text2:     #9090a8;
  --text3:     #5a5a72;
  --border:    #00ff88;
  --border2:   #1e1e38;

  --shadow-green: 0 0 8px rgba(0,255,136,.35);
  --shadow-box:   0 4px 24px rgba(0,0,0,.6);

  --font-px:   'Press Start 2P', monospace;
  --font-vt:   'VT323', monospace;
  --font-ar:   'Cairo', sans-serif;

  --radius:    2px;
  --gap:       1.5rem;
  --nav-h:     60px;
}

[data-theme="light"] {
  --bg:        #f0ece0;
  --bg2:       #e8e2d0;
  --bg3:       #ddd8c8;
  --card:      #ece7d8;
  --card-h:    #e0dac8;

  --green:     #006640;
  --green-dim: #004d30;
  --orange:    #b84400;
  --blue:      #0055aa;
  --purple:    #6620b0;
  --red:       #cc1100;

  --text:      #1a1428;
  --text2:     #4a4460;
  --text3:     #8a849a;
  --border:    #006640;
  --border2:   #c8c2b0;

  --shadow-green: 0 0 8px rgba(0,102,64,.2);
  --shadow-box:   0 4px 24px rgba(0,0,0,.12);
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-vt);
  font-size: 18px;
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background .3s, color .3s;
}

/* Arabic body font override */
:lang(ar) body,
:lang(ar) .book-card-title,
:lang(ar) .book-card-author,
:lang(ar) .cat-name,
:lang(ar) .subcat-name,
:lang(ar) .book-title,
:lang(ar) .page-title,
:lang(ar) .page-desc,
:lang(ar) .book-desc,
:lang(ar) .book-meta,
:lang(ar) .meta-val,
:lang(ar) .hero-sub,
:lang(ar) p,
:lang(ar) span.meta-val {
  font-family: var(--font-ar);
}

:lang(ar) .hero-tagline,
:lang(ar) .section-title,
:lang(ar) .subsection-title {
  font-family: var(--font-ar);
  font-weight: 700;
  letter-spacing: 0;
}

/* ── Scanline overlay ──────────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,.05) 2px,
    rgba(0,0,0,.05) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

[data-theme="light"] body::before { opacity: .3; }

/* ── Pixel border mixin ─────────────────────────────────────── */
.pixel-box {
  border: 2px solid var(--border);
  background: var(--card);
  box-shadow: 4px 4px 0 var(--border), var(--shadow-green);
  transition: box-shadow .15s, transform .15s;
}
.pixel-box:hover {
  box-shadow: 6px 6px 0 var(--green), 0 0 20px rgba(0,255,136,.25);
  transform: translate(-1px,-1px);
  cursor: pointer;
}

/* ── Scrollbar ──────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 0; }

/* ── Typography ─────────────────────────────────────────────── */
h1,h2,h3 { font-family: var(--font-px); line-height: 1.4; }
:lang(ar) h1,:lang(ar) h2,:lang(ar) h3 { font-family: var(--font-ar); font-weight: 700; }
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Glitch effect ──────────────────────────────────────────── */
.glitch {
  position: relative;
  animation: glitch-anim 4s infinite;
}
.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute;
  left: 0; top: 0;
  width: 100%;
}
.glitch::before {
  color: var(--orange);
  clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
  animation: glitch-top 4s infinite;
}
.glitch::after {
  color: var(--blue);
  clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
  animation: glitch-bot 4s infinite;
}
@keyframes glitch-top  { 0%,95%,100%{offset:0} 97%{left:2px;top:-1px} 98%{left:-2px;top:1px} }
@keyframes glitch-bot  { 0%,95%,100%{offset:0} 96%{left:-2px;top:2px} 99%{left:2px;top:-1px} }
@keyframes glitch-anim { 0%,90%,100%{transform:none} 92%{transform:skewX(1deg)} 94%{transform:skewX(-1deg)} }

/* ── Blink ──────────────────────────────────────────────────── */
.blink { animation: blink .8s step-end infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

/* ── Buttons ────────────────────────────────────────────────── */
.btn-pixel {
  font-family: var(--font-px);
  font-size: .6rem;
  color: var(--bg);
  background: var(--green);
  border: 2px solid var(--green);
  padding: .55rem 1.1rem;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: .05em;
  box-shadow: 3px 3px 0 var(--green-dim);
  transition: all .12s;
  display: inline-block;
  text-decoration: none;
}
:lang(ar) .btn-pixel { font-family: var(--font-ar); font-size: .85rem; letter-spacing: 0; }
.btn-pixel:hover  { transform: translate(-1px,-1px); box-shadow: 4px 4px 0 var(--green-dim); }
.btn-pixel:active { transform: translate(1px,1px);   box-shadow: 1px 1px 0 var(--green-dim); }
.btn-pixel:disabled { opacity: .5; cursor: not-allowed; transform: none; }

.btn-pixel.btn-sm { font-size: .5rem; padding: .35rem .7rem; }
.btn-pixel.btn-read {
  font-size: .75rem;
  padding: .8rem 2rem;
  margin-top: 1.5rem;
  background: var(--green);
}

.btn-back {
  font-family: var(--font-px);
  font-size: .55rem;
  color: var(--green);
  background: transparent;
  border: 1px solid var(--green);
  padding: .4rem .8rem;
  cursor: pointer;
  transition: all .12s;
}
:lang(ar) .btn-back { font-family: var(--font-ar); font-size: .85rem; }
.btn-back:hover { background: var(--green); color: var(--bg); }

.btn-link {
  font-family: var(--font-px);
  font-size: .55rem;
  color: var(--green);
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
:lang(ar) .btn-link { font-family: var(--font-ar); font-size: .85rem; }

/* ── Navigation ─────────────────────────────────────────────── */
#navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: var(--bg2);
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  gap: 1rem;
  box-shadow: 0 2px 0 var(--green-dim);
}

#site-name {
  font-family: var(--font-px);
  font-size: .65rem;
  color: var(--green);
  text-shadow: var(--shadow-green);
  cursor: pointer;
  flex-shrink: 0;
  letter-spacing: .05em;
}
:lang(ar) #site-name { font-family: var(--font-ar); font-size: 1rem; font-weight: 700; }

.nav-links {
  display: flex;
  gap: .5rem;
  align-items: center;
  flex: 1;
}

.nav-btn {
  font-family: var(--font-px);
  font-size: .5rem;
  color: var(--text2);
  background: none;
  border: 1px solid transparent;
  padding: .3rem .6rem;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
:lang(ar) .nav-btn { font-family: var(--font-ar); font-size: .8rem; }
.nav-btn:hover { color: var(--green); border-color: var(--green); }

.nav-controls {
  display: flex;
  gap: .5rem;
  align-items: center;
  flex-shrink: 0;
}

#btn-theme, #btn-lang {
  font-family: var(--font-px);
  font-size: .6rem;
  color: var(--text);
  background: var(--bg3);
  border: 1px solid var(--border2);
  padding: .3rem .6rem;
  cursor: pointer;
  transition: all .15s;
}
#btn-theme:hover, #btn-lang:hover { border-color: var(--green); color: var(--green); }

/* ── Search bar in nav ─────────────────────────────────────── */
#search-form {
  display: flex;
  align-items: center;
  flex: 1;
  max-width: 340px;
  gap: .3rem;
}

#search-input {
  flex: 1;
  font-family: var(--font-vt);
  font-size: 1rem;
  color: var(--text);
  background: var(--bg3);
  border: 1px solid var(--border2);
  padding: .35rem .7rem;
  outline: none;
  transition: border-color .15s;
  border-radius: 0;
}
:lang(ar) #search-input { font-family: var(--font-ar); font-size: .95rem; direction: rtl; }
#search-input:focus { border-color: var(--green); }
#search-input::placeholder { color: var(--text3); }

#search-btn {
  font-family: var(--font-px);
  font-size: .5rem;
  color: var(--bg);
  background: var(--green);
  border: 1px solid var(--green);
  padding: .42rem .7rem;
  cursor: pointer;
  transition: opacity .15s;
}
#search-btn:hover { opacity: .85; }

/* ── Main content ───────────────────────────────────────────── */
#main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  min-height: calc(100vh - var(--nav-h));
}

/* ── Hero ───────────────────────────────────────────────────── */
.hero {
  position: relative;
  text-align: center;
  padding: 4rem 1rem 3rem;
  margin-bottom: 3rem;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 50%, rgba(0,255,136,.06) 0%, transparent 70%),
    repeating-linear-gradient(90deg, transparent, transparent 60px, rgba(0,255,136,.03) 60px, rgba(0,255,136,.03) 61px),
    repeating-linear-gradient(0deg,  transparent, transparent 60px, rgba(0,255,136,.03) 60px, rgba(0,255,136,.03) 61px);
  pointer-events: none;
}

.hero-title {
  font-size: clamp(1rem, 4vw, 2rem);
  color: var(--green);
  text-shadow: 0 0 20px rgba(0,255,136,.5), 2px 2px 0 rgba(0,0,0,.8);
  margin-bottom: 1.2rem;
  letter-spacing: .04em;
}

.hero-tagline {
  font-family: var(--font-px);
  font-size: clamp(.55rem, 1.5vw, .85rem);
  color: var(--orange);
  letter-spacing: .1em;
  text-shadow: 0 0 10px rgba(255,107,0,.4);
  margin-bottom: .8rem;
}

.hero-sub {
  font-family: var(--font-vt);
  font-size: 1.2rem;
  color: var(--text2);
}
:lang(ar) .hero-sub { font-family: var(--font-ar); }

/* ── Sections ───────────────────────────────────────────────── */
.section { margin-bottom: 3rem; }

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.2rem;
  border-bottom: 2px solid var(--border2);
  padding-bottom: .5rem;
}

.section-title {
  font-family: var(--font-px);
  font-size: .75rem;
  color: var(--green);
  letter-spacing: .06em;
}
:lang(ar) .section-title { font-family: var(--font-ar); font-size: 1.1rem; }

.subsection-title {
  font-family: var(--font-px);
  font-size: .65rem;
  color: var(--text2);
  margin: 1.5rem 0 1rem;
  letter-spacing: .05em;
  text-transform: uppercase;
}
:lang(ar) .subsection-title { font-family: var(--font-ar); font-size: 1rem; }

/* ── Category grid ──────────────────────────────────────────── */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
}

.cat-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  padding: 1.5rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: all .15s;
}

.cat-icon { font-size: 2.2rem; line-height: 1; }

.cat-name {
  font-family: var(--font-px);
  font-size: .55rem;
  color: var(--text);
  line-height: 1.6;
}
:lang(ar) .cat-name { font-family: var(--font-ar); font-size: .9rem; }

.cat-count {
  font-family: var(--font-px);
  font-size: .45rem;
  color: var(--green);
}
:lang(ar) .cat-count { font-family: var(--font-ar); font-size: .75rem; }

/* ── Subcategory grid ───────────────────────────────────────── */
.subcats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.subcat-card {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  padding: 1.2rem 1rem;
  cursor: pointer;
}

.subcat-name {
  font-family: var(--font-px);
  font-size: .55rem;
  color: var(--text);
  line-height: 1.6;
}
:lang(ar) .subcat-name { font-family: var(--font-ar); font-size: .95rem; }

.subcat-count {
  font-family: var(--font-px);
  font-size: .45rem;
  color: var(--green);
}
:lang(ar) .subcat-count { font-family: var(--font-ar); font-size: .8rem; }

/* ── Books horizontal scroll ────────────────────────────────── */
.books-scroll {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  padding-bottom: .75rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}
.books-scroll::-webkit-scrollbar { height: 4px; }
.books-scroll .book-card {
  flex: 0 0 160px;
  scroll-snap-align: start;
}

/* ── Books grid ─────────────────────────────────────────────── */
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1.2rem;
}

/* ── Book card ──────────────────────────────────────────────── */
.book-card {
  cursor: pointer;
  transition: transform .15s;
  border: 1px solid var(--border2);
  background: var(--card);
}
.book-card:hover {
  transform: translateY(-3px);
  border-color: var(--green);
  box-shadow: 0 6px 20px rgba(0,0,0,.4), 0 0 12px rgba(0,255,136,.15);
}

.book-card-cover {
  position: relative;
  aspect-ratio: 2/3;
  overflow: hidden;
  background: var(--bg3);
}
.book-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .3s;
}
.book-card:hover .book-card-cover img { transform: scale(1.04); }

.book-card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(7,7,15,.75);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .2s;
}
.book-card:hover .book-card-overlay { opacity: 1; }

/* Fallback when no cover */
.book-card-cover.no-cover {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}
.book-card-cover.no-cover::after { content: '📖'; }

.book-card-info {
  padding: .6rem .7rem;
}
.book-card-title {
  font-family: var(--font-px);
  font-size: .5rem;
  color: var(--text);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: .3rem;
}
:lang(ar) .book-card-title { font-family: var(--font-ar); font-size: .85rem; }

.book-card-author {
  font-size: .9rem;
  color: var(--text2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
:lang(ar) .book-card-author { font-family: var(--font-ar); }

.book-card-cat {
  font-size: .85rem;
  color: var(--green);
  opacity: .7;
  margin-top: .1rem;
}
:lang(ar) .book-card-cat { font-family: var(--font-ar); }

.book-card-reads {
  font-size: .85rem;
  color: var(--text3);
  margin-top: .3rem;
  display: flex;
  align-items: center;
  gap: .3rem;
}

/* ── Page headers ───────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border2);
}

.page-title {
  font-family: var(--font-px);
  font-size: clamp(.65rem, 2vw, .9rem);
  color: var(--text);
  line-height: 1.5;
}
:lang(ar) .page-title { font-family: var(--font-ar); font-size: clamp(1rem, 3vw, 1.4rem); }

.page-desc {
  font-size: 1rem;
  color: var(--text2);
  margin-top: .3rem;
}
:lang(ar) .page-desc { font-family: var(--font-ar); }

/* ── Book detail ────────────────────────────────────────────── */
.book-detail {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2.5rem;
  align-items: start;
}

.book-cover-wrap {
  position: relative;
  border: 2px solid var(--border);
  box-shadow: 6px 6px 0 var(--green), var(--shadow-green);
}

.book-cover-lg {
  width: 100%;
  aspect-ratio: 2/3;
  object-fit: cover;
  display: block;
}

.cover-scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg, transparent, transparent 3px,
    rgba(0,0,0,.06) 3px, rgba(0,0,0,.06) 4px
  );
  pointer-events: none;
}

.book-breadcrumb {
  font-size: .9rem;
  color: var(--text2);
  margin-bottom: .8rem;
  display: flex;
  flex-wrap: wrap;
  gap: .3rem;
  align-items: center;
}

.crumb-link { cursor: pointer; color: var(--green); }
.crumb-link:hover { text-decoration: underline; }
.crumb-sep { color: var(--text3); }

.book-title {
  font-family: var(--font-px);
  font-size: clamp(.65rem, 2vw, 1rem);
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 1.2rem;
}
:lang(ar) .book-title { font-family: var(--font-ar); font-size: clamp(1.2rem, 3vw, 1.6rem); }

.book-meta { display: flex; flex-direction: column; gap: .6rem; margin-bottom: 1rem; }
.meta-row {
  display: flex;
  gap: .8rem;
  align-items: baseline;
  border-bottom: 1px solid var(--border2);
  padding-bottom: .4rem;
}
.meta-label {
  font-family: var(--font-px);
  font-size: .5rem;
  color: var(--green);
  min-width: 80px;
  flex-shrink: 0;
}
:lang(ar) .meta-label { font-family: var(--font-ar); font-size: .8rem; min-width: 70px; }

.meta-val { font-size: 1.1rem; color: var(--text); }
:lang(ar) .meta-val { font-family: var(--font-ar); }

.reads-count { color: var(--yellow); }

.book-desc {
  font-size: 1.1rem;
  color: var(--text2);
  line-height: 1.7;
  margin-top: .8rem;
  border-left: 3px solid var(--green);
  padding-left: .8rem;
}
:lang(ar) .book-desc {
  font-family: var(--font-ar);
  border-left: none;
  border-right: 3px solid var(--green);
  padding-left: 0;
  padding-right: .8rem;
}

.access-note {
  font-size: .85rem;
  color: var(--text3);
  margin-top: .5rem;
}
:lang(ar) .access-note { font-family: var(--font-ar); }

/* ── Pagination ─────────────────────────────────────────────── */
.pagination {
  display: flex;
  justify-content: center;
  gap: .4rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.btn-page {
  font-family: var(--font-px);
  font-size: .5rem;
  color: var(--text2);
  background: var(--card);
  border: 1px solid var(--border2);
  padding: .4rem .7rem;
  cursor: pointer;
  transition: all .12s;
}
.btn-page:hover, .btn-page.active {
  border-color: var(--green);
  color: var(--green);
  background: var(--card-h);
}

/* ── Loading screen ─────────────────────────────────────────── */
.loading-screen, .error-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40vh;
}

.pixel-loader {
  font-family: var(--font-px);
  font-size: .65rem;
  color: var(--green);
  display: flex;
  align-items: center;
  gap: .8rem;
  text-shadow: var(--shadow-green);
}
:lang(ar) .pixel-loader { font-family: var(--font-ar); font-size: 1rem; }

.error-box {
  padding: 2rem 2.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

.error-icon { font-size: 2.5rem; }
.error-code { font-family: var(--font-px); font-size: 2rem; color: var(--red); }
.empty-msg { color: var(--text3); font-size: 1rem; padding: 2rem 0; }

/* ── Footer ─────────────────────────────────────────────────── */
#footer {
  border-top: 2px solid var(--border2);
  text-align: center;
  padding: 1.5rem;
  font-family: var(--font-px);
  font-size: .45rem;
  color: var(--text3);
  letter-spacing: .08em;
}
:lang(ar) #footer { font-family: var(--font-ar); font-size: .75rem; }

/* ── Mobile ─────────────────────────────────────────────────── */
@media (max-width: 768px) {
  #navbar { padding: 0 .8rem; gap: .5rem; flex-wrap: wrap; height: auto; min-height: var(--nav-h); }
  #search-form { order: 3; width: 100%; max-width: 100%; padding: .3rem 0 .5rem; }
  .nav-links { gap: .3rem; }

  #main-content { padding: 1.2rem .8rem 3rem; }

  .hero { padding: 2.5rem .5rem 2rem; }
  .hero-title { font-size: clamp(.8rem, 5vw, 1.3rem); }

  .book-detail {
    grid-template-columns: 1fr;
  }
  .book-cover-wrap { max-width: 200px; margin: 0 auto; }

  .categories-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
  .books-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }

  .section-title { font-size: .65rem; }
  .page-title { font-size: .65rem; }
}

@media (max-width: 480px) {
  .categories-grid { grid-template-columns: repeat(2, 1fr); }
  .books-grid { grid-template-columns: repeat(2, 1fr); }
  .book-detail { gap: 1.5rem; }
}

/* ── RTL overrides ──────────────────────────────────────────── */
[dir="rtl"] .meta-row { flex-direction: row-reverse; text-align: right; }
[dir="rtl"] .section-header { flex-direction: row-reverse; }
[dir="rtl"] .page-header { flex-direction: row-reverse; }
[dir="rtl"] .book-card-reads { flex-direction: row-reverse; }
[dir="rtl"] .nav-links { flex-direction: row-reverse; }
[dir="rtl"] #search-form { flex-direction: row-reverse; }
[dir="rtl"] .pagination { flex-direction: row-reverse; }
[dir="rtl"] .pixel-loader { flex-direction: row-reverse; }