/* Variáveis CSS */
:root {
    --primary-color: #003366;
    --secondary-color: #0056b3;
    --success-color: #00b050;
    --info-color: #0070c0;
    --danger-color: #c00000;
    --warning-color: #ffc107;
    --light-bg: #f8f9fa;
    --card-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --card-shadow-hover: 0 8px 15px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

/* Reset e base */
* {
    box-sizing: border-box;
}

body {
    background: linear-gradient(135deg, #f4f8fb 0%, #e8f4f8 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
}

/* Navbar */
.navbar {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%) !important;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: var(--transition);
}

.navbar-nav .nav-link:hover {
    transform: translateY(-2px);
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    overflow: hidden;
    background: white;
    margin-bottom: 1.5rem;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--card-shadow-hover);
}

.card-img-top {
    height: 200px;
    object-fit: cover;
    transition: var(--transition);
}

.card:hover .card-img-top {
    transform: scale(1.05);
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.card-text {
    color: #6c757d;
    line-height: 1.6;
}

/* Botões */
.btn {
    border-radius: 8px;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white !important;
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #00d455 100%);
    color: white !important;
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color) 0%, #0099ff 100%);
    color: white !important;
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color) 0%, #ff3333 100%);
    color: white !important;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color) 0%, #ffdb4d 100%);
    color: #212529 !important;
}

.btn-secondary {
    background: linear-gradient(135deg, #6c757d 0%, #5a6268 100%);
    color: white !important;
}

/* Formulários */
.form-control {
    border-radius: 8px;
    border: 2px solid #e9ecef;
    padding: 0.75rem 1rem;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 51, 102, 0.25);
}

.form-label {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* Alertas */
.alert {
    border-radius: var(--border-radius);
    border: none;
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
}

.alert-success {
    background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
    color: #155724;
}

.alert-danger {
    background: linear-gradient(135deg, #f8d7da 0%, #f5c6cb 100%);
    color: #721c24;
}

.alert-warning {
    background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
    color: #856404;
}

.alert-info {
    background: linear-gradient(135deg, #d1ecf1 0%, #bee5eb 100%);
    color: #0c5460;
}

/* Categorias e subcategorias */
.categoria-card, .subcategoria-card, .arquivo-card {
    position: relative;
}

.categoria-card::before, .subcategoria-card::before, .arquivo-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

/* Arquivo cards específicos */
.arquivo-card .card-body {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 200px;
}

.arquivo-info {
    flex-grow: 1;
}

.arquivo-actions {
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Ícones de arquivo */
.file-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Loading spinner */
.spinner-border {
    color: var(--primary-color);
}

/* Paginação */
.pagination {
    justify-content: center;
    margin-top: 2rem;
}

.page-link {
    color: var(--primary-color);
    border-radius: 8px;
    margin: 0 0.25rem;
    border: none;
    padding: 0.75rem 1rem;
}

.page-link:hover {
    background-color: var(--primary-color);
    color: white;
}

.page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Dropdown */
.dropdown-menu {
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    border: none;
    padding: 0.5rem 0;
}

.dropdown-item {
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
}

.dropdown-item:hover {
    background-color: #f8f9fa;
    color: var(--primary-color);
}

/* Responsividade */
@media (max-width: 768px) {
    .card-img-top {
        height: 150px;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .card-body {
        padding: 1rem;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
        margin-bottom: 0.5rem;
    }
    
    .arquivo-actions {
        flex-direction: column;
    }
}

/* Animações */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card {
    animation: fadeIn 0.6s ease-out;
}

/* Tooltips personalizados */
.tooltip {
    font-size: 0.875rem;
}

.tooltip-inner {
    background-color: var(--primary-color);
    border-radius: 6px;
}

/* Breadcrumb */
.breadcrumb {
    background: transparent;
    padding: 0;
    margin-bottom: 1.5rem;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: ">";
    color: var(--primary-color);
}

.breadcrumb-item a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb-item.active {
    color: #6c757d;
}

/* Estatísticas */
.stats-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    margin-bottom: 1.5rem;
}

.stats-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stats-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* Footer */
footer {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    padding: 2rem 0;
    margin-top: 3rem;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}