/* library.css */
:root {
    --lib-primary: #1D4ED8;
    --lib-dark: #1E3A8A;
    --lib-bg: #F3F4F6;
    --lib-white: #FFFFFF;
    --lib-text: #1F2937;
    --lib-muted: #6B7280;
    --lib-border: #E5E7EB;
    --lib-radius: 16px;
    --lib-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --lib-shadow-md: 0 10px 25px rgba(0, 0, 0, 0.08);
}

body {
    background-color: var(--lib-bg);
}

.lib-hero {
    background: linear-gradient(135deg, var(--lib-dark) 0%, var(--lib-primary) 60%, #3B82F6 100%);
    border-radius: 28px;
    padding: 60px 40px;
    color: white;
    margin-bottom: 35px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(29, 78, 216, 0.28);
}

.lib-hero::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -80px;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    animation: float-orb 7s ease-in-out infinite;
}

.lib-hero::after {
    content: '';
    position: absolute;
    bottom: -60px;
    left: 5%;
    width: 220px;
    height: 220px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.07) 0%, transparent 70%);
    border-radius: 50%;
    animation: float-orb 9s ease-in-out infinite reverse;
}

.lib-hero-content {
    position: relative;
    z-index: 2;
}

.lib-hero h1 {
    font-size: 40px;
    font-weight: 900;
    margin: 0 0 12px;
    line-height: 1.2;
}

.lib-hero p {
    font-size: 17px;
    opacity: 0.85;
    margin: 0;
    font-weight: 500;
}

.controls-card {
    background: var(--lib-white);
    border-radius: var(--lib-radius);
    padding: 24px 28px;
    margin-bottom: 30px;
    box-shadow: var(--lib-shadow);
    border: 1px solid var(--lib-border);
    display: grid;
    grid-template-columns: 1fr 1fr 1fr auto;
    gap: 18px;
    align-items: end;
}

.ctrl-group label {
    display: block;
    font-weight: 700;
    font-size: 12px;
    color: var(--lib-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.ctrl-group input,
.ctrl-group select {
    width: 100%;
    padding: 11px 16px;
    border: 1.5px solid var(--lib-border);
    border-radius: 12px;
    font-size: 14px;
    font-family: 'Tajawal', sans-serif;
    color: var(--lib-text);
    background: var(--lib-bg);
    transition: border-color .25s, box-shadow .25s;
    outline: none;
}

.ctrl-group input:focus,
.ctrl-group select:focus {
    border-color: var(--lib-primary);
    box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.1);
    background: white;
}

.ctrl-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.btn-search {
    background: linear-gradient(135deg, var(--lib-dark), var(--lib-primary));
    color: white;
    border: none;
    border-radius: 12px;
    padding: 11px 20px;
    font-weight: 700;
    font-size: 14px;
    font-family: 'Tajawal', sans-serif;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all .25s;
    box-shadow: 0 4px 12px rgba(29, 78, 216, 0.2);
}

.btn-search:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(29, 78, 216, 0.3);
}

.btn-reset {
    background: var(--lib-bg);
    color: var(--lib-muted);
    border: 1.5px solid var(--lib-border);
    border-radius: 12px;
    padding: 10px 20px;
    font-weight: 700;
    font-size: 14px;
    font-family: 'Tajawal', sans-serif;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all .25s;
}

.btn-reset:hover {
    border-color: var(--lib-primary);
    color: var(--lib-primary);
}

.stats-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 22px;
    color: var(--lib-muted);
    font-size: 14px;
    font-weight: 600;
}

.stats-bar strong {
    color: var(--lib-primary);
}

.library-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.book-card {
    background: var(--lib-white);
    border-radius: var(--lib-radius);
    border: 1px solid var(--lib-border);
    box-shadow: var(--lib-shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.book-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--lib-dark), var(--lib-primary));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.35s ease;
}

.book-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--lib-shadow-md);
    border-color: rgba(29, 78, 216, 0.2);
}

.book-card:hover::before {
    transform: scaleX(1);
    transform-origin: left;
}

.book-card.book-card--focused {
    border-color: var(--lib-primary);
    box-shadow: 0 0 0 4px rgba(29, 78, 216, 0.14), var(--lib-shadow-md);
    animation: library-share-focus 1.15s ease-in-out 3;
}

.book-card.book-card--focused::before {
    transform: scaleX(1);
    transform-origin: left;
}

@keyframes library-share-focus {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

.book-icon-bar {
    padding: 28px 24px 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.book-icon-wrap {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, #DBEAFE, #EFF6FF);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--lib-primary);
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.book-icon-wrap.cat-model {
    background: linear-gradient(135deg, #DCFCE7, #F0FDF4);
    color: #15803D;
}

.book-icon-wrap.cat-summary {
    background: linear-gradient(135deg, #FFEDD5, #FFF7ED);
    color: #C2410C;
}

.book-icon-wrap.cat-default {
    background: linear-gradient(135deg, #F3E8FF, #FAF5FF);
    color: #7C3AED;
}

.book-card:hover .book-icon-wrap {
    transform: scale(1.1) rotate(-5deg);
}

.book-meta-header {
    flex: 1;
    min-width: 0;
}

.book-title {
    font-size: 16px;
    font-weight: 800;
    color: var(--lib-text);
    margin: 0 0 6px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-author {
    font-size: 13px;
    color: var(--lib-muted);
    display: flex;
    align-items: center;
    gap: 5px;
}

.book-body {
    padding: 0 24px 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.book-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 700;
}

.tag-phase {
    background: #EFF6FF;
    color: #1D4ED8;
    border: 1px solid #DBEAFE;
}

.tag-category {
    background: #F0FDF4;
    color: #15803D;
    border: 1px solid #DCFCE7;
}

.book-note {
    font-size: 13px;
    color: var(--lib-muted);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-date {
    font-size: 12px;
    color: var(--lib-muted);
    display: flex;
    align-items: center;
    gap: 5px;
}

.book-footer {
    padding: 14px 24px;
    border-top: 1px solid var(--lib-border);
    background: var(--lib-bg);
    display: flex;
    gap: 8px;
    align-items: center;
}

.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex: 1;
    padding: 10px;
    background: linear-gradient(135deg, #15803D, #16A34A);
    color: white !important;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: 14px;
    text-decoration: none;
    cursor: pointer;
    transition: all .25s;
    box-shadow: 0 3px 10px rgba(21, 128, 61, 0.2);
    font-family: 'Tajawal', sans-serif;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(21, 128, 61, 0.3);
}

.loading-wrap {
    display: none;
    text-align: center;
    padding: 60px;
    color: var(--lib-muted);
}

.spinner {
    display: inline-block;
    width: 44px;
    height: 44px;
    border: 4px solid var(--lib-border);
    border-top-color: var(--lib-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-bottom: 16px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 70px 30px;
    color: var(--lib-muted);
}

.empty-icon {
    font-size: 4rem;
    opacity: 0.25;
    display: block;
    margin-bottom: 16px;
}

.empty-text {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--lib-text);
}

.error-box {
    background: #FEF2F2;
    color: #B91C1C;
    padding: 16px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    border: 1px solid #FECACA;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

@media (max-width: 768px) {
    .controls-card {
        grid-template-columns: 1fr;
    }

    .ctrl-buttons {
        flex-direction: row;
    }

    .lib-hero {
        padding: 40px 24px;
    }

    .lib-hero h1 {
        font-size: 28px;
    }
}