:root {
    --bg-color: #0d0f14;
    --sidebar-bg: #161a22;
    --card-bg: #1c212b;
    --accent-color: #6366f1;
    --accent-glow: rgba(99, 102, 241, 0.4);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #2e3545;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    padding: 24px;
    transition: var(--transition);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 48px;
    color: var(--accent-color);
}

.logo i {
    width: 32px;
    height: 32px;
}

nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.nav-item {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 12px 16px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
    width: 100%;
    text-align: left;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--accent-color);
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.sidebar-footer {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Main Content */
.main-content {
    flex-grow: 1;
    padding: 40px;
    overflow-y: auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
}

.btn-primary {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--accent-glow);
}

/* Dashboard Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

/* Featured Books (Destaques) */
.featured-books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 420px), 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.featured-card {
    background: linear-gradient(135deg, rgba(28,33,43,1) 0%, rgba(38,44,57,1) 100%);
    border: 1px solid var(--accent-color);
    border-radius: calc(var(--radius) + 4px);
    padding: 30px;
    display: flex;
    gap: 24px;
    align-items: center;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.15);
    position: relative;
    overflow: hidden;
}

.featured-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-color);
}

.featured-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
}

.featured-card-image {
    width: 140px;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 6px 15px rgba(0,0,0,0.4);
    flex-shrink: 0;
}

.featured-card-placeholder {
    width: 140px;
    height: 200px;
    border-radius: 8px;
    background: rgba(255,255,255,0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.featured-card-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-grow: 1;
}

.featured-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--warning);
    margin-bottom: 8px;
    line-height: 1.3;
}

.featured-card-author {
    color: var(--text-secondary);
    font-size: 1rem;
}

.featured-card-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--warning);
    color: #000;
    padding: 4px 12px;
    font-size: 0.8rem;
    font-weight: 800;
    text-transform: uppercase;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.stat-card {
    background: var(--card-bg);
    padding: 24px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.stat-card.clickable {
    cursor: pointer;
    transition: var(--transition);
}

.stat-card.clickable:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.02);
}

.stat-card i {
    width: 40px;
    height: 40px;
    padding: 8px;
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-color);
}

.stat-card.warning i {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.stat-card .value {
    font-size: 2rem;
    font-weight: 700;
}

.stat-card .label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Tables & Lists */
.data-table-container {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

td {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}

tr:hover td {
    background: rgba(255, 255, 255, 0.01);
}

.badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-disponivel {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.badge-emprestado {
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-color);
}

.badge-atrasado {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

/* Forms & Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.modal-overlay:not(.hidden) {
    opacity: 1;
    pointer-events: auto;
}

.modal {
    background: var(--card-bg);
    width: 100%;
    max-width: 600px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex-grow: 1;
}

.close-modal {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
}

/* Detail View Modal Content Styles */
.book-detail-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.book-detail-header {
    display: flex;
    gap: 25px;
}

.detail-cover-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    width: 150px;
    flex-shrink: 0;
}

.detail-cover {
    width: 150px;
    height: 220px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.4);
}

.detail-info {
    flex: 1;
}

.detail-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 5px;
    line-height: 1.2;
}

.detail-author {
    color: var(--text-secondary);
    margin-bottom: 15px;
    font-size: 1rem;
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    font-size: 0.85rem;
}

.detail-item label {
    display: block;
    font-size: 0.65rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.detail-shop-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 15px;
    background: var(--warning);
    color: #000;
    border-radius: var(--radius);
    font-size: 0.8rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    width: 100%;
}

.detail-shop-link:hover {
    transform: translateY(-2px);
    background: var(--warning-hover);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.5);
}

@media (max-width: 480px) {
    .book-detail-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .detail-cover-wrapper {
        width: 120px;
        margin: 0 auto;
    }
    .detail-cover {
        width: 120px;
        height: 180px;
    }
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-row {
    display: flex;
    gap: 15px;
}

.form-row .form-group {
    flex: 1;
}

input,
select {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    transition: var(--transition);
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px var(--accent-glow);
}

.hidden {
    display: none !important;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8rem;
}

.loan-actions {
    display: flex;
    gap: 12px;
}

@media (max-width: 768px) {
    .btn-sm {
        padding: 10px 16px; /* Larger touch target for mobile browsers */
    }
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition);
}

.btn-icon:hover {
    color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.btn-icon.btn-destaque {
    color: var(--text-secondary);
}

.btn-icon.btn-destaque.is-active {
    color: #f59e0b;
}

.btn-icon.btn-destaque:hover {
    color: #f59e0b;
    background: rgba(245, 158, 11, 0.12);
}

.text-danger {
    color: var(--danger);
    font-weight: 600;
}

/* Toast */
#toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 2000;
}

.toast {
    padding: 12px 24px;
    border-radius: 8px;
    background: var(--card-bg);
    color: white;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    border-left: 4px solid var(--accent-color);
    animation: slideIn 0.3s ease-out;
}

.toast-success {
    border-left-color: var(--success);
}

.toast-danger {
    border-left-color: var(--danger);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Pagination */
.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.pagination-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 500;
}

.pagination-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border-color: var(--accent-color);
}

.pagination-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    box-shadow: 0 4px 10px var(--accent-glow);
}

.pagination-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin: 0 10px;
}

.loader {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
    color: var(--text-secondary);
}

/* --- Responsividade (Mobile First/Adjustments) --- */
@media (max-width: 768px) {
    body {
        overflow: auto;
        height: auto;
    }

    .app-container {
        display: block;
        height: auto;
    }

    .main-content {
        padding: 20px 10px !important;
        width: 100% !important;
        margin-left: 0 !important;
    }

    .page-header {
        margin-bottom: 25px !important;
    }

    .page-header h1 {
        font-size: 1.8rem !important;
        text-align: center;
    }

    .page-header p {
        text-align: center;
        font-size: 0.95rem !important;
    }

    /* Transformar Tabela em Cards Compactos */
    .data-table-container {
        background: none;
        border: none;
        overflow-x: visible;
    }

    table, thead, tbody, th, td, tr {
        display: block;
    }

    thead tr {
        position: absolute;
        top: -9999px;
        left: -9999px;
    }

    tr {
        background: var(--card-bg);
        border: 1px solid var(--border-color);
        border-radius: var(--radius);
        margin-bottom: 8px;
        padding: 10px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        display: grid;
        grid-template-areas: 
            "patrimonio status"
            "titulo titulo"
            "autor autor";
        grid-template-columns: 1fr auto;
        gap: 2px 10px;
        cursor: pointer;
        transition: transform 0.1s;
    }

    tr:active {
        transform: scale(0.98);
        background: rgba(255,255,255,0.08);
    }

    td {
        border: none !important;
        padding: 0 !important;
        min-height: auto !important;
        display: block !important;
        text-align: left !important;
        justify-content: flex-start !important;
    }

    td::before {
        display: none !important;
    }

    td[data-label="Patrimônio"] {
        grid-area: patrimonio;
        font-size: 0.65rem;
        color: var(--text-secondary);
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }

    td[data-label="Título"] {
        grid-area: titulo;
        font-size: 0.95rem;
        font-weight: 700;
        line-height: 1.2;
    }

    td[data-label="Capa"] {
        display: none !important; /* Hide covers on mobile as requested */
    }

    td[data-label="Autor"] {
        grid-area: autor;
        font-size: 0.8rem;
        color: var(--text-secondary);
    }

    /* Group minor info */
    td[data-label="Categoria"],
    td[data-label="Idioma"],
    td[data-label="Gênero"],
    td[data-label="Editora"],
    td[data-label="Ano"],
    td[data-label="Condição"],
    td[data-label="Edição"],
    td[data-label="Doador"] {
        display: none !important;
    }
    
    td[data-label="Status"] {
        grid-area: status;
        padding-top: 0 !important;
        display: flex !important;
        align-items: center;
        justify-content: flex-end !important;
    }

    td[data-label="Status"] .badge {
        font-size: 0.6rem !important;
        padding: 2px 6px !important;
    }

    td[data-label="Ação"] {
        display: none !important; /* Hide action button, click on row instead */
    }
    /* Featured Cards on Mobile */
    .featured-books-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    .featured-card {
        flex-direction: row !important;
        text-align: left !important;
        gap: 15px !important;
        padding: 15px !important;
    }
    .featured-card-image {
        width: 80px !important;
        height: 120px !important;
    }
    .featured-card-title {
        font-size: 1.1rem !important;
    }
    .featured-card-badge {
        font-size: 0.7rem !important;
        padding: 2px 8px !important;
    }
}