/* =====================================================
   Al-Mashreq eBookstore — styles.css (Base layout)
   CHANGES (2026-02-18):
   - Replaces accidental minimal/old styles.css.
   - Adds strong :focus-visible states, better card hierarchy & spacing,
     filter active indicators, and smoother micro-interactions.
   - Keeps existing IDs/data flows for JS filters/search.
   ===================================================== */

/* ========== Fonts (local, fast) ========== */
@font-face{
  font-family:"Cairo";
  src:
    url("../fonts/Cairo-Regular.woff2") format("woff2"),
    url("../fonts/Cairo-Regular.ttf") format("truetype");
  font-weight:400;
  font-style:normal;
  font-display:swap;
}

/* ========== Tokens ========== */
:root{
  --blue:#1769ff;
  --blue-dark:#0b1b33;
  --orange:#ff7a18;
  --orange-dark:#d95f07;

  --bg:#f6f9ff;
  --card:#ffffff;
  --text:#0b1220;
  --muted:#586174;
  --border:#e6e9f2;
  --shadow: 0 10px 24px rgba(11,18,32,.10);
  --radius:16px;

  --brand-blue: var(--blue-dark);
  --ink: var(--text);
  --line: var(--border);

  --container: 1400px;
  --gap: 22px;

  /* A11y */
  --focus: rgba(23,105,255,.55);
  --focusRing: 0 0 0 4px rgba(23,105,255,.16);
}

*{box-sizing:border-box}
html,body{height:100%}
html{scroll-behavior:smooth}
body{
  margin:0;
  padding:0;
  font-family:"Cairo", system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,#ffffff 0%, var(--bg) 100%);
}

a{color:inherit}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit}
::selection{background:rgba(23,105,255,.18)}

/* Visible focus for keyboard users (WCAG) */
:where(a,button,input,select,textarea,[tabindex]):focus-visible{
  outline:none;
  box-shadow: var(--focusRing);
}

/* ========== Layout helpers ========== */
.container{
  max-width: var(--container);
  margin:0 auto;
  padding:18px 20px;
}
.section{padding:18px 0}
.row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.card{
  background:var(--card);
  border:1px solid rgba(2,10,25,.08);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.card-lite{
  background:rgba(255,255,255,.75);
  border:1px solid rgba(2,10,25,.08);
  border-radius:var(--radius);
}

/* Skip link (appears on focus) */
.skip-link{
  position:absolute;
  top:8px;
  right:8px;
  z-index:1000;
  background:#fff;
  color:#0b1220;
  border:1px solid rgba(2,10,25,.14);
  border-radius:12px;
  padding:10px 12px;
  transform: translateY(-140%);
  transition: transform .15s ease;
}
.skip-link:focus{transform: translateY(0)}

/* ========== Header base (theme overrides colors) ========== */
.topbar, .site-header{
  position:sticky;
  top:0;
  z-index:50;
  border-bottom:1px solid var(--border);
}
.topbar .container,
.site-header .container{display:flex}

/* Nav pills (base; theme.css recolors) */
.nav{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:flex-start;
}
.navlink{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:10px 14px;
  border-radius:999px;
  text-decoration:none;
  border:1px solid rgba(2,10,25,.10);
  background:rgba(255,255,255,.72);
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease, border-color .12s ease;
}
.navlink:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(2,10,25,.10)}
.navlink.active{font-weight:900}

.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand-title{font-weight:900}

/* ========== Buttons ========== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:10px 14px;
  border-radius:12px;
  border:1px solid rgba(2,10,25,.12);
  background:#fff;
  font-weight:800;
  cursor:pointer;
  transition:transform .12s ease, box-shadow .12s ease, opacity .12s ease;
}
.btn:hover{transform:translateY(-1px);box-shadow:0 10px 22px rgba(2,10,25,.10)}
.w-100{width:100%}

/* =====================================================
   Desktop Index Layout (keep exactly)
   ===================================================== */
.page-shell{padding-top:14px;padding-bottom:32px}
.content-shell{
  display:grid;
  grid-template-columns: 1fr 340px; /* RTL: sidebar on the RIGHT */
  gap: var(--gap);
  align-items:start;
}
.results-area{min-width:0}

/* Sticky sidebar (desktop) */
.sidebar{
  position: sticky;
  top: 92px;
  height: fit-content;
  min-width: 0;
}

/* Filter card */
.side-card{
  background:#fff;
  border:1px solid rgba(2,10,25,.08);
  border-radius:18px;
  box-shadow:0 12px 28px rgba(2,10,25,.08);
  padding:16px;
}
.side-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:8px}
.side-head h2{margin:0;font-size:16px;font-weight:900}

.field{display:block;margin-top:12px}
.field-label{display:block;font-size:12px;color:var(--muted);margin-bottom:6px;font-weight:800}
.control{
  width:100%;
  min-height:44px;
  border-radius:14px;
  border:1px solid rgba(2,10,25,.12);
  background:#fff;
  padding:0 12px;
  outline:none;
  transition: border-color .12s ease, box-shadow .12s ease;
}
.control:focus{border-color:var(--focus);box-shadow:var(--focusRing)}

/* Filter active state (JS toggles .is-active on .field) */
.field.is-active .field-label{color:#0b1b33}
.field.is-active .control{border-color:rgba(255,122,24,.55);box-shadow:0 0 0 4px rgba(255,122,24,.14)}

.row-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}

/* Hero */
.hero-main{padding:18px 0 8px}
.hero-card{
  background: linear-gradient(180deg, rgba(11,27,51,.92), rgba(11,27,51,.78));
  border-radius: 22px;
  padding: 18px;
  box-shadow: 0 18px 40px rgba(0,0,0,.14);
  color:#fff;
}
.hero-top{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.hero-title{margin:0;font-size:22px;font-weight:1000;letter-spacing:.2px}
.hero-sub{margin:8px 0 0;opacity:.92;line-height:1.6}
.hero-kpis{display:flex;gap:12px;flex-wrap:wrap}
.hero-kpis .kpi{
  min-width:120px;
  text-align:center;
  background: rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.10);
  border-radius:18px;
  padding:12px 14px;
}
.hero-kpis .num{font-weight:1000;font-size:18px}
.hero-kpis .lbl{opacity:.82;font-size:12px;margin-top:6px}

/* =====================================================
   Grid / Book Cards
   ===================================================== */
.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:10px}
@media (max-width:1200px){.grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:900px){.grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:520px){.grid{grid-template-columns:repeat(1,minmax(0,1fr))}}

.book-card{
  background:#fff;
  border:1px solid rgba(2,10,25,.08);
  border-radius:22px;
  padding:14px;
  box-shadow:0 12px 28px rgba(2,10,25,.10);
  transition: transform .16s ease, box-shadow .16s ease;
  text-align:center;
}
.book-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(2,10,25,.14)}
.book-card:focus-within{box-shadow:0 18px 40px rgba(2,10,25,.14), var(--focusRing)}

.book-cover-wrapper{border-radius:18px;overflow:hidden;border:1px solid rgba(2,10,25,.08);background:#f2f4f9}
.book-cover{width:100%;height:auto}
.cover-fallback{display:flex;align-items:center;justify-content:center;aspect-ratio:3/4;color:rgba(2,10,25,.55);font-weight:900}

.book-card h3{margin:12px 0 6px;font-size:16px;font-weight:1000;line-height:1.4}
.book-author{margin:0 0 8px;color:var(--muted);font-size:13.5px;font-weight:800}
.book-card .meta{display:grid;gap:6px;font-size:13px;color:#2b3649;line-height:1.6}
.meta-k{color:var(--muted);font-weight:900}
.meta-v{color:#0b1220}

.book-links{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px;justify-content:center}
.link-chip{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:8px 12px;
  border-radius:999px;
  text-decoration:none;
  font-weight:900;
  font-size:12px;
  border:1px solid rgba(2,10,25,.10);
  background:#fff;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
}

@media (max-width:480px){
  .book-links{gap:8px}
  .link-chip{flex:1 1 auto}
}
.link-chip:hover{box-shadow:0 10px 18px rgba(2,10,25,.10);transform:translateY(-1px)}
.link-chip:active{transform:translateY(0)}

.page-foot{margin-top:18px;color:var(--muted);font-size:12px}
.empty{background:#fff;border:1px dashed rgba(2,10,25,.18);border-radius:18px;padding:18px;color:var(--muted)}

/* =====================================================
   Mobile Filters: drawer overlay
   ===================================================== */
.filters-fab{display:none}
.filters-close{display:none}

@media (max-width:980px){
  .content-shell{grid-template-columns:1fr}

  .filters-fab{
    display:inline-flex;
    position:fixed;
    left:16px;
    bottom:16px;
    z-index:90;
    min-height:48px;
    padding:10px 16px;
    border-radius:999px;
    background: linear-gradient(90deg, rgba(23,105,255,1) 0%, rgba(255,122,24,1) 100%);
    color:#fff;
    border:none;
    font-weight:1000;
    box-shadow:0 18px 42px rgba(2,10,25,.22);
  }
  .filters-fab .count{
    display:inline-grid;
    place-items:center;
    min-width:28px;
    height:28px;
    padding:0 8px;
    border-radius:999px;
    background: rgba(0,0,0,.22);
    margin-inline-start:10px;
    font-size:12px;
  }

  .sidebar{
    display:none;
    position:fixed;
    inset:0;
    background: rgba(11,27,51,.50);
    backdrop-filter: blur(2px);
    z-index:100;
    padding:18px;
  }
  body.filters-open{overflow:hidden}
  body.filters-open .sidebar{display:block}

  .side-card{
    max-width:560px;
    width:100%;
    margin:0 auto;
    border-radius:22px;
    padding:16px;
    box-shadow:0 22px 60px rgba(0,0,0,.30);
  }

  .filters-close{
    display:inline-flex;
    min-width:44px;
    min-height:44px;
    border-radius:14px;
    border:1px solid rgba(2,10,25,.14);
    background:#fff;
  }

  .row-2{grid-template-columns:1fr}
}

/* =====================================================
   Footer
   ===================================================== */
.site-footer{background:#0b1b33;color:#fff;margin-top:26px}
.site-footer .footer-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;padding:18px 16px}
.foot-brand{display:flex;gap:12px;align-items:center;text-decoration:none}
.foot-logo{width:44px;height:44px;border-radius:14px;background:#fff;padding:4px}
.foot-brand-text{display:grid;gap:4px}
.foot-brand-text span{opacity:.78;font-size:12px}
.foot-nav{display:flex;gap:10px;flex-wrap:wrap}
.foot-link{display:inline-flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:999px;text-decoration:none;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.10)}
.foot-link:hover{background:rgba(255,255,255,.16)}
.foot-copy{opacity:.9;font-size:12px}

/* =====================================================
   PATCH: Filter panel spacing + stronger sticky behavior
   Add this block at the END of styles.css
   ===================================================== */

/* Make the sticky filter panel truly persistent */
@media (min-width: 981px){
  .sidebar{
    position: sticky;
    top: 92px; /* keep as your current header offset */
    max-height: calc(100vh - 110px);
    overflow: auto;
    padding-bottom: 6px;
    overscroll-behavior: contain;
  }
  /* Smooth scrolling inside the filter card if it overflows */
  .side-card{
    padding: 14px;           /* tighter */
  }
}

/* Improve internal spacing (mobile + desktop) */
.side-head{ margin-bottom: 6px; }
.field{ margin-top: 10px; }
.field-label{ margin-bottom: 4px; line-height: 1.35; }

/* Controls: consistent padding + reduce empty look */
.control{
  padding: 0 12px;
}

/* Disabled subcategory looks intentionally disabled */
select.control:disabled{
  opacity: .72;
  cursor: not-allowed;
  background: rgba(2,10,25,.04);
  
  .group { margin-bottom: 18px; }
.group-title{
  margin: 10px 0 8px;
  font-size: 1.05rem;
  font-weight: 700;
  opacity: .9;
}
}