/* ═══════════════════════════════════════════════════════════════
   STBB eBOOKS — Main Stylesheet
   Aesthetic: Clean light theme with teal accents
   ═══════════════════════════════════════════════════════════════ */

:root {
    --navy:       #f0f4f8;
    --navy-2:     #e8eef5;
    --navy-3:     #dde5ef;
    --navy-card:  #ffffff;
    --amber:      #0d9488;
    --amber-dark: #0b7a70;
    --amber-glow: rgba(13, 148, 136, 0.12);
    --teal:       #0d9488;
    --red:        #ef4444;
    --text-1:     #0f1f2e;
    --text-2:     #3d5166;
    --text-3:     #7a92a8;
    --border:     rgba(0,0,0,0.09);
    --radius:     14px;
    --radius-sm:  8px;
    --shadow:     0 8px 32px rgba(0,0,0,0.10);
    --shadow-card:0 4px 20px rgba(0,0,0,0.08);
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body:    'DM Sans', sans-serif;
    --transition:   0.22s ease;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    background: var(--navy);
    color: var(--text-1);
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.65;
    min-height: 100vh;
}
a { color: var(--amber); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--amber-dark); }
.brand-logo {
    height: 40px;
    width: auto;
    vertical-align: middle;
}

img { max-width: 100%; display: block; }
input, select, textarea, button { font-family: var(--font-body); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--navy-2); }
::-webkit-scrollbar-thumb { background: var(--navy-3); border-radius: 3px; }

/* ══════════════════════════ NAVBAR ══════════════════════════ */

.navbar {
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 12px rgba(0,0,0,0.06);
}
.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 64px;
    display: flex;
    align-items: center;
    gap: 20px;
}
.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-1);
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    white-space: nowrap;
    flex-shrink: 0;
}
.nav-brand em { color: var(--amber); font-style: italic; }
.brand-icon { font-size: 1.5rem; }
.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-left: auto;
}
.nav-search {
    display: flex;
    background: var(--navy-2);
    border: 1px solid var(--border);
    border-radius: 30px;
    overflow: hidden;
}
.nav-search input {
    background: none;
    border: none;
    outline: none;
    color: var(--text-1);
    padding: 8px 16px;
    width: 220px;
    font-size: 13px;
}
.nav-search input::placeholder { color: var(--text-3); }
.nav-search button {
    background: none;
    border: none;
    padding: 0 14px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-2);
}
.nav-link {
    color: var(--text-2);
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
}
.nav-link:hover { color: var(--amber); }
.hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--text-1);
    font-size: 22px;
    cursor: pointer;
    margin-left: auto;
}
.mobile-menu {
    display: none;
    flex-direction: column;
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    gap: 12px;
    background: #fff;
}
.mobile-menu a {
    color: var(--text-2);
    font-size: 15px;
    padding: 4px 0;
}
.mobile-menu.open { display: flex; }
.mobile-search {
    display: flex;
    gap: 8px;
}
.mobile-search input {
    flex: 1;
    background: var(--navy-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-1);
    padding: 10px 14px;
    outline: none;
    font-size: 14px;
}
.mobile-search button {
    background: var(--amber);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    font-weight: 600;
    cursor: pointer;
}

/* ══════════════════════════ HERO ══════════════════════════ */
.hero {
    background: linear-gradient(135deg, #e0f2f0 0%, #f0f7f6 100%);
    padding: 60px 20px 50px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border);
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(13,148,136,0.10) 0%, transparent 70%);
}
.hero-content { position: relative; z-index: 1; max-width: 680px; margin: 0 auto; }
.hero-badge {
    display: inline-block;
    background: rgba(13,148,136,0.12);
    border: 1px solid rgba(13,148,136,0.3);
    color: var(--amber);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    padding: 5px 14px;
    border-radius: 30px;
    margin-bottom: 20px;
}
.hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 16px;
    color: var(--text-1);
}
.hero h1 span { color: var(--amber); }
.hero p {
    color: var(--text-2);
    font-size: 1rem;
    max-width: 500px;
    margin: 0 auto 28px;
}
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}
.stat { text-align: center; }
.stat-num {
    display: block;
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--amber);
}
.stat-label { font-size: 12px; color: var(--text-3); text-transform: uppercase; letter-spacing: 1px; }

/* ══════════════════════════ SECTION ══════════════════════════ */
.section { padding: 48px 20px; max-width: 1200px; margin: 0 auto; }
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 12px;
}
.section-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    position: relative;
    padding-left: 16px;
    color: var(--text-1);
}
.section-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 4px;
    bottom: 4px;
    width: 4px;
    background: var(--amber);
    border-radius: 2px;
}
.view-all {
    font-size: 13px;
    font-weight: 600;
    color: var(--amber);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ══════════════════════════ MEDIUM FILTER ══════════════════════════ */
.medium-filter {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}
.filter-btn {
    background: #fff;
    border: 1px solid var(--border);
    color: var(--text-2);
    padding: 8px 20px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all var(--transition);
    text-decoration: none;
    display: inline-block;
}
.filter-btn:hover, .filter-btn.active {
    background: var(--amber);
    color: #fff;
    border-color: var(--amber);
}

/* ══════════════════════════ CLASS GRID ══════════════════════════ */
.class-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 14px;
}
.class-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 16px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    color: var(--text-1);
    position: relative;
    overflow: hidden;
}
.class-card::before {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 3px;
    background: var(--amber);
    transform: scaleX(0);
    transition: transform var(--transition);
}
.class-card:hover {
    border-color: rgba(13,148,136,0.4);
    transform: translateY(-3px);
    box-shadow: var(--shadow-card);
    color: var(--text-1);
}
.class-card:hover::before { transform: scaleX(1); }
.class-icon { font-size: 2rem; margin-bottom: 10px; }
.class-name {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-1);
}
.class-count { font-size: 11px; color: var(--text-3); margin-top: 4px; }

/* ══════════════════════════ BOOK GRID ══════════════════════════ */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 20px;
}
.book-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all var(--transition);
    cursor: pointer;
    text-decoration: none;
    color: var(--text-1);
    display: flex;
    flex-direction: column;
}
.book-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: rgba(13,148,136,0.35);
    color: var(--text-1);
}
.book-cover-wrap {
    position: relative;
    padding-top: 138%;
    background: var(--navy-3);
    overflow: hidden;
}
.book-cover-wrap img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.book-card:hover .book-cover-wrap img { transform: scale(1.05); }
.book-cover-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--navy-3), var(--navy-2));
}
.book-medium-badge {
    position: absolute;
    top: 8px; right: 8px;
    background: rgba(13,148,136,0.90);
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.book-info {
    padding: 12px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.book-title {
    font-size: 13px;
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    color: var(--text-1);
}
.book-pub {
    font-size: 11px;
    color: var(--text-3);
    margin-top: auto;
}

/* ══════════════════════════ BOOK DETAIL PAGE ══════════════════════════ */
.book-detail {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
}
.book-detail-grid {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 40px;
    align-items: start;
}
.book-detail-cover {
    position: sticky;
    top: 84px;
}
.book-detail-cover img {
    width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}
.book-detail-cover .placeholder-cover {
    width: 100%;
    padding-top: 138%;
    background: linear-gradient(135deg, var(--navy-3), var(--navy-2));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    position: relative;
}
.book-detail-info .breadcrumb {
    font-size: 12px;
    color: var(--text-3);
    margin-bottom: 16px;
    display: flex;
    gap: 6px;
    align-items: center;
    flex-wrap: wrap;
}
.breadcrumb a { color: var(--amber); }
.book-detail-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 12px;
    color: var(--text-1);
}
.book-meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 20px 0 28px;
}
.meta-item {
    background: var(--navy-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
}
.meta-label { font-size: 11px; color: var(--text-3); text-transform: uppercase; letter-spacing: 1px; }
.meta-value { font-size: 14px; font-weight: 600; color: var(--text-1); margin-top: 2px; }
.book-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition);
    text-decoration: none;
}
.btn-primary {
    background: var(--amber);
    color: #fff;
}
.btn-primary:hover {
    background: var(--amber-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(13,148,136,0.25);
    color: #fff;
}
.btn-secondary {
    background: var(--navy-2);
    color: var(--text-1);
    border: 1px solid var(--border);
}
.btn-secondary:hover {
    border-color: var(--amber);
    color: var(--amber);
}
.btn-success {
    background: #059669;
    color: white;
}
.btn-success:hover { background: #047857; transform: translateY(-1px); color: white; }
.btn-danger { background: var(--red); color: white; }

/* ══════════════════════════ PDF VIEWER ══════════════════════════ */
.pdf-viewer-container {
    background: var(--navy-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-top: 32px;
    box-shadow: var(--shadow-card);
}
.pdf-toolbar {
    background: #fff;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    border-bottom: 1px solid var(--border);
}
.pdf-toolbar button {
    background: var(--navy-2);
    border: 1px solid var(--border);
    color: var(--text-1);
    padding: 6px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    transition: all var(--transition);
}
.pdf-toolbar button:hover { border-color: var(--amber); color: var(--amber); background: var(--amber-glow); }
.pdf-page-info { color: var(--text-2); font-size: 13px; }
#pdf-canvas-container {
    overflow: auto;
    max-height: 75vh;
    background: #e0e0e0;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    gap: 12px;
}
#pdf-canvas-container canvas {
    max-width: 100%;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

/* ── PDF Loader (light theme) ── */
#pdf-loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 40px;
    gap: 18px;
    width: 100%;
}
#pdf-loader .loader-icon {
    font-size: 48px;
    animation: pulse-icon 1.4s ease-in-out infinite;
}
@keyframes pulse-icon {
    0%, 100% { transform: scale(1);   opacity: 1; }
    50%       { transform: scale(1.1); opacity: 0.6; }
}
#pdf-loader .loader-label {
    color: var(--text-1);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: .3px;
}
#pdf-loader .loader-sub {
    color: var(--text-3);
    font-size: 13px;
    margin-top: -10px;
}
#pdf-loader .loader-bar-wrap {
    width: min(420px, 90%);
    background: var(--navy-3);
    border-radius: 999px;
    height: 10px;
    overflow: hidden;
}
#pdf-loader .loader-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #0d9488, #14b8a6, #5eead4);
    background-size: 200% 100%;
    border-radius: 999px;
    transition: width .25s ease;
    animation: shimmer 1.8s linear infinite;
}
@keyframes shimmer {
    0%   { background-position: 200% center; }
    100% { background-position: -200% center; }
}
#pdf-loader .loader-pct {
    font-size: 28px;
    font-weight: 700;
    color: var(--amber);
    line-height: 1;
}
#pdf-loader .loader-detail {
    color: var(--text-3);
    font-size: 12px;
}

/* ══════════════════════════ SEARCH PAGE ══════════════════════════ */
.search-header {
    padding: 40px 20px 0;
    max-width: 1200px;
    margin: 0 auto;
}
.search-bar-large {
    display: flex;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    max-width: 700px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-card);
}
.search-bar-large input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-1);
    padding: 16px 20px;
    font-size: 16px;
}
.search-bar-large input::placeholder { color: var(--text-3); }
.search-bar-large button {
    background: var(--amber);
    color: #fff;
    border: none;
    padding: 0 24px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: background var(--transition);
}
.search-bar-large button:hover { background: var(--amber-dark); }
.search-count { color: var(--text-2); font-size: 14px; margin-bottom: 8px; }

/* ══════════════════════════ ADMIN ══════════════════════════ */
.admin-layout {
    display: flex;
    min-height: 100vh;
}
.admin-sidebar {
    width: 240px;
    background: #fff;
    border-right: 1px solid var(--border);
    padding: 0;
    flex-shrink: 0;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    box-shadow: 2px 0 12px rgba(0,0,0,0.05);
}
.sidebar-brand {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-1);
}
.sidebar-brand em { color: var(--amber); font-style: italic; }
.sidebar-nav { padding: 16px 0; }
.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 20px;
    color: var(--text-2);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition);
    border-left: 3px solid transparent;
}
.sidebar-nav a:hover, .sidebar-nav a.active {
    color: var(--amber);
    background: var(--amber-glow);
    border-left-color: var(--amber);
}
.admin-main {
    margin-left: 240px;
    flex: 1;
    padding: 30px;
    max-width: 100%;
    background: var(--navy);
}
.admin-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 12px;
}
.admin-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-1);
}
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}
.stat-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow-card);
}
.stat-card-icon { font-size: 2rem; }
.stat-card-num { font-family: var(--font-display); font-size: 1.8rem; font-weight: 700; color: var(--amber); line-height: 1; }
.stat-card-label { font-size: 12px; color: var(--text-3); text-transform: uppercase; letter-spacing: 1px; margin-top: 2px; }

/* ── Admin Table ── */
.admin-table-wrap { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
table th {
    background: var(--navy-2);
    color: var(--text-2);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-2);
    vertical-align: middle;
    background: #fff;
}
table tr:hover td { background: var(--navy-2); }
table td:first-child { color: var(--text-1); font-weight: 500; }
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
}
.badge-sindhi  { background: rgba(13,148,136,0.12); color: #0b7a70; }
.badge-urdu    { background: rgba(6,182,212,0.12);  color: #0891b2; }
.badge-english { background: rgba(99,102,241,0.12); color: #6366f1; }

/* ── Admin Form ── */
.admin-form {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    max-width: 700px;
    box-shadow: var(--shadow-card);
}
.form-group { margin-bottom: 20px; }
.form-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-2);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}
.form-control {
    width: 100%;
    background: var(--navy-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-1);
    padding: 11px 14px;
    font-size: 14px;
    outline: none;
    transition: border-color var(--transition);
}
.form-control:focus { border-color: var(--amber); box-shadow: 0 0 0 3px var(--amber-glow); }
.form-control option { background: #fff; color: var(--text-1); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-hint { font-size: 11px; color: var(--text-3); margin-top: 4px; }

/* ── Alert / Flash ── */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    border: 1px solid;
}
.alert-success { background: rgba(5,150,105,0.08); border-color: rgba(5,150,105,0.3); color: #047857; }
.alert-error   { background: rgba(239,68,68,0.08); border-color: rgba(239,68,68,0.3); color: #dc2626; }
.alert-info    { background: var(--amber-glow); border-color: rgba(13,148,136,0.3); color: var(--amber); }

/* ══════════════════════════ LOGIN ══════════════════════════ */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #e0f2f0 0%, #f0f7f6 100%);
}
.login-box {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow);
}
.login-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 900;
    margin-bottom: 8px;
    text-align: center;
    color: var(--text-1);
}
.login-sub { color: var(--text-3); font-size: 13px; text-align: center; margin-bottom: 28px; }

/* ══════════════════════════ PAGINATION ══════════════════════════ */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 40px;
    flex-wrap: wrap;
}
.page-btn {
    background: #fff;
    border: 1px solid var(--border);
    color: var(--text-2);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
}
.page-btn:hover, .page-btn.active {
    background: var(--amber);
    color: #fff;
    border-color: var(--amber);
}

/* ══════════════════════════ EMPTY STATE ══════════════════════════ */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-3);
}
.empty-state-icon { font-size: 4rem; margin-bottom: 16px; }
.empty-state h3 { font-size: 1.2rem; color: var(--text-2); margin-bottom: 8px; }

/* ══════════════════════════ FOOTER ══════════════════════════ */
.site-footer {
    background: #fff;
    border-top: 1px solid var(--border);
    margin-top: 60px;
    padding: 40px 20px 0;
    box-shadow: 0 -2px 12px rgba(0,0,0,0.04);
}
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer-brand span {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    display: block;
    margin-bottom: 8px;
    color: var(--text-1);
}
.footer-brand p { font-size: 13px; color: var(--text-3); }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links span {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-3);
    margin-bottom: 4px;
}
.footer-links a { font-size: 13px; color: var(--text-2); }
.footer-links a:hover { color: var(--amber); }
.footer-copy {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 0;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-3);
    text-align: center;
}

/* ══════════════════════════ BOOK COVER THUMB ══════════════════════════ */
.thumb-sm {
    width: 40px;
    height: 56px;
    object-fit: cover;
    border-radius: 4px;
    background: var(--navy-3);
}

/* ══════════════════════════ RESPONSIVE ══════════════════════════ */
@media (max-width: 900px) {
    .book-detail-grid { grid-template-columns: 1fr; }
    .book-detail-cover { position: static; max-width: 220px; }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .admin-sidebar { display: none; }
    .admin-main { margin-left: 0; padding: 20px; }
    .form-row { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
    .nav-actions { display: none; }
    .hamburger { display: block; }
    .hero { padding: 40px 16px 36px; }
    .book-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 14px; }
    .class-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 10px; }
    .footer-inner { grid-template-columns: 1fr; gap: 24px; }
    .book-meta-grid { grid-template-columns: 1fr; }
}
@media (max-width: 380px) {
    .book-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ══ RTL Support for Sindhi/Urdu ══ */
[dir="rtl"] body { font-family: 'DM Sans', 'Jameel Noori Nastaleeq', sans-serif; }
[dir="rtl"] .section-title { padding-left: 0; padding-right: 16px; }
[dir="rtl"] .section-title::before { left: auto; right: 0; }
[dir="rtl"] .sidebar-nav a { border-left: none; border-right: 3px solid transparent; }
[dir="rtl"] .sidebar-nav a:hover, [dir="rtl"] .sidebar-nav a.active { border-left: none; border-right-color: var(--amber); }